(19)
(11)EP 3 504 371 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
24.03.2021 Bulletin 2021/12

(21)Application number: 17872523.0

(22)Date of filing:  15.11.2017
(51)International Patent Classification (IPC): 
D06F 37/24(2006.01)
D06F 37/12(2006.01)
D06F 37/42(2006.01)
(86)International application number:
PCT/KR2017/012929
(87)International publication number:
WO 2018/093139 (24.05.2018 Gazette  2018/21)

(54)

WASHING MACHINE

WASCHMASCHINE

MACHINE À LAVER


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 21.11.2016 KR 20160155231
12.04.2017 KR 20170047447

(43)Date of publication of application:
03.07.2019 Bulletin 2019/27

(73)Proprietor: Samsung Electronics Co., Ltd.
Suwon-si, Gyeonggi-do 16677 (KR)

(72)Inventors:
  • HAN, Ju Bum
    Seoul 04733 (KR)
  • JUNG, Dong Ha
    Yongin-si Gyeonggi-do 16953 (KR)
  • KANG, Jeong Hoon
    Seoul 05504 (KR)
  • HONG, Kwan Woo
    Suwon-si Gyeonggi-do 16698 (KR)

(74)Representative: Gulde & Partner 
Patent- und Rechtsanwaltskanzlei mbB Wallstraße 58/59
10179 Berlin
10179 Berlin (DE)


(56)References cited: : 
WO-A1-2014/030961
KR-Y1- 200 320 745
US-A1- 2007 256 458
US-A1- 2015 020 551
US-A1- 2015 184 325
KR-Y1- 0 117 588
US-A1- 2007 039 359
US-A1- 2012 056 517
US-A1- 2015 020 551
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    [Technical Field]



    [0001] Embodiments of the present disclosure relate to a washing machine capable of limiting movements of a tub and preventing vibrations of the tub from being transferred to a cabinet.

    [Background Art]



    [0002] In general, a washing machine includes a cabinet forming an outer appearance of the washing machine, a tub disposed in the inside of the cabinet and storing water, and a washing drum disposed in the inside of the tub and accommodating laundry to wash the laundry by a water current generated according to rotations of a pulsator installed on the bottom of the washing drum. The washing machine performs a washing course to separate dirt from laundry, a rinsing course to rinse washed laundry, and a dehydration course to dehydrate wet laundry.

    [0003] Particularly, during the dehydration course, the washing drum rotates at high speed, and may perform precession according to a distribution of laundry contained in the washing drum. Since the precession of the washing drum causes vibrations of the tub, a suspension apparatus is generally installed between the tub and the cabinet in order to prevent vibrations of the tub from being transferred to the cabinet.

    [0004] However, if laundry contained in the washing drum is abnormally distributed to one side to be excessively unsymmetrical, the precession of the washing drum deviates from a normal level to cause excessive vibrations of the tub. In this case, due to a great displacement of the tub, the tub may collide with the cabinet despite cushioning of the suspension apparatus. Accordingly, in order to prevent the tub from colliding with the cabinet due to vibrations, a method of disposing the tub with a sufficient distance from the cabinet, or a method of attaching a cushion member such as sponge and the like on the inner surface of the cabinet has been used.

    [0005] US 2015/020551 A1 describes a washing machine with a piston and a cylinder, wherein the piston and the cylinder are arranged in such a way, that the vibration of the outer tub leads to friction between the piston and the cylinder, which results in a reduction of the vibration of the outer tub.

    [0006] However, the method of widening the distance between the tub and the cabinet increases the size of the washing machine, and the method of attaching the cushion member on the inner wall of the cabinet requires a separate work process and increases the cost of materials.

    [Disclosure]


    [Technical Problem]



    [0007] Therefore, it is an aspect of the present disclosure to provide a washing machine having a structure capable of limiting a movement range of a tub according to vibrations, and preventing vibrations of the tub from being transferred to a cabinet.

    [0008] Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

    [Technical Solution]



    [0009] In accordance with one aspect of the present disclosure, a washing machine includes a cabinet; a tub disposed in the inside of the cabinet; at least one suspension apparatus configured to reduce vibrations of the tub, and to connect the tub to the cabinet such that the tub is supported on the cabinet; and a position guide apparatus having one end connected to the at least one suspension apparatus, and the other end connected to the tub, and configured to limit a movement range in horizontal direction of the tub.The position guide apparatus includes a cylinder having an inside space; and a stopper having at least one portion located in the inside space of the cylinder, and the remaining portion located outside the cylinder.A catching portion is formed at an end of the at least one portion of the stopper located in the inside space of the cylinder, and a suspension bar coupling portion is formed at one end of the remaining portion of the stopper located outside the cylinder, wherein the suspension bar coupling portion is connected to a suspension bar included in the suspension apparatus. The stopper includes a first absorption member disposed adjacent to the catching portion, and a second absorption member disposed adjacent to the suspension bar coupling portion, or the stopper includes a first absorption member disposed on one surface with respect to the catching portion, and a second absorption member disposed on the opposite surface with respect to the catching portion.

    [0010] One end of the cylinder may further include a stopper inserting hole along which a stopper moves, and the other end of the cylinder may further include a tub fixing hole, wherein a tub fixing portion may be inserted into the tub fixing hole such that both ends of the tub fixing portion may be rotatably coupled with a position guide apparatus coupling portion formed in the outer surface of the tub.

    [0011] The tub fixing portion may be inserted into the cylinder such that the cylinder may be rotatable on the tub fixing portion as a rotation shaft.

    [0012] The cylinder may be movable between a first position at which the cylinder contacts the first absorption member, and a second position at which the cylinder contacts the second absorption member.

    [0013] The suspension bar coupling portion may include a first member having a first accommodating space into which the stopper may be inserted, and a second member having a second accommodating space into which the suspension bar may be inserted.

    [0014] The second member may further include a protrusion, and the first member may further include a groove into which the protrusion of the second member may be inserted so that the second member may be coupled with the first member to be rotatable with respect to the first member using the protrusion as a rotation shaft.

    [0015] The second accommodating space may be movable along the suspension bar.

    [0016] The position guide apparatus may limit a distance between the suspension apparatus and the tub to a predetermined distance.

    [Advantageous Effects]



    [0017] The washing machine according to an embodiment of the present disclosure, which includes the cabinet, the tub disposed in the inside of the cabinet, the at least one suspension apparatus configured to reduce vibrations of the tub and connecting the tub to the cabinet such that the tub is supported on the cabinet, and the position guide apparatus whose one end is connected to the at least one suspension apparatus and whose other end is connected to the tub to limit a movement range of the tub, can limit movements of the tub, and prevent vibrations generated from the tub from being transferred to the cabinet.

    [Description of Drawings]



    [0018] These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

    FIG. 1 is a perspective view of a washing machine according to an embodiment of the present disclosure.

    FIG. 2 is a cross-sectional view of the washing machine according to the embodiment of the present disclosure.

    FIG. 3 is a perspective view showing a tub, a suspension apparatus, and a position guide apparatus of the washing machine according to the embodiment of the present disclosure.

    FIG. 4 is a top view showing the tub, the suspension apparatus, and the position guide apparatus of the washing machine according to the embodiment of the present disclosure.

    FIG. 5 shows the position guide apparatus of the washing machine according to the embodiment of the present disclosure.

    FIG. 6 is a cross-sectional view of the position guide apparatus of the washing machine according to the embodiment of the present disclosure.

    FIGS. 7A, 7B, 8A, and 8B are views for describing a situation in which the position guide apparatus lengthens according to a movement of the tub generated in the washing machine according to the embodiment of the present disclosure.

    FIGS. 9A, 9B, 10A, and 10B are views for describing a situation in which the position guide apparatus shortens according to a movement of the tub generated in the washing machine according to the embodiment of the present disclosure.

    FIG. 11 is a graph for comparing a case in which the washing machine according to the embodiment includes the position guide apparatus to a case in which the washing machine includes no position guide apparatus.

    FIGS. 12A and 12B are views for describing a situation in which the position guide apparatus prevents vibrations of the tub from being transferred to the cabinet in the washing machine according to the embodiment of the present disclosure.

    FIG. 13 is a graph for comparing a case in which the washing machine according to the embodiment includes the position guide apparatus to a case in which the washing machine includes no position guide apparatus.

    FIG. 14 is a perspective view showing another embodiment of a position guide apparatus included in a washing machine according to an embodiment of the present disclosure.

    FIGS. 15A and 15B show a tub, a suspension apparatus, and a position guide apparatus of a washing machine according to another embodiment of the present disclosure.

    FIGS. 16A and 16B show a position guide apparatus according to an embodiment of the present disclosure.

    FIGS. 17A, 17B, 17C, and 17D are views for describing movements of the tub when the washing machine according to the embodiment of the present disclosure performs a washing course.

    FIGS. 18A, 18B, 18C, 18D, and 18E are views for describing a process in which a position guide apparatus according to an embodiment of the present disclosure reduces a movement distance of the tub.

    FIGS. 19A and 19B are graphs for comparing a case in which the position guide apparatus according to the embodiment is installed in the washing machine to a case in which no position guide apparatus is installed in the washing machine.

    FIG. 20 is a view for describing a situation in which the position guide apparatus prevents vibrations of the tub from being transferred to the cabinet in the washing machine according to the embodiment of the present disclosure.

    FIG. 21 is a graph for comparing a case in which the position guide apparatus is installed in the washing machine according to the embodiment to a case in which no position guide apparatus is installed in the washing machine.

    FIG. 22 is a perspective view showing another embodiment of a transversely moving portion included in the position guide apparatus according to the embodiment.

    FIGS. 23A and 23B show another embodiment of a longitudinally moving portion included in the position guide apparatus according to the embodiment.


    Mode for the Invention



    [0019] Hereinafter, various embodiments of the present disclosure will be described with reference to the accompanying drawings. The embodiments and terms used in the embodiments are not for the purpose of limiting technology disclosed in the present disclosure to specific embodiments, and it should be understood that all modifications, equivalents, and substitutes can be made on the embodiments. In regard of descriptions of the drawings, similar components will be referred to as similar reference numerals. Also, it is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. In the present disclosure, the term 'A or B' or 'at least one of A or/and B' may cover all possible combinations of enumerated items. The expressions 'first' or 'second' may modify the names of various components irrespective of sequence and/or importance, not limiting the components. These expressions may be used to distinguish one component from another component. For example, when it is said that a component (e.g., a first component) is 'operatively or communicatively coupled with/to' or 'connected to' another component (e.g., a second component), it should be understood that the one component is connected to the other component directly or through any other component (e.g., a third component).

    [0020] The term 'configured to' as used herein may be replaced with, for example, the term 'suitable for' 'having the capacity to', 'designed to', 'adapted to', 'made to', or 'capable of under circumstances. The term 'configured to' may not necessarily mean 'specifically designed to' in hardware. Instead, the term 'configured to' may mean that a device may mean 'capable of with another device or part. For example, 'a processor configured to execute A, B, and C' may mean a dedicated processor (e.g., an embedded processor) for performing the corresponding operations or a generic-purpose processor (e.g., a central processing unit (CPU) or an application processor (AP)) for performing the corresponding operations.

    [0021] FIG. 1 is a perspective view of a washing machine according to an embodiment of the present disclosure.

    [0022] Referring to FIG. 1, a cabinet 12 forming an outer appearance of a washing machine 1 may be in the shape of a nearly rectangular parallelepiped having an open top portion and an open bottom portion, and may include left and right side panels 12b and 12d, a front panel 12a, and a rear panel 12c. The upper portion of the cabinet 12 may be coupled with a top cover 14 having an opening to enable a user to put laundry into a washing drum (not shown), and a door 10 for opening or closing the opening may be coupled with the top cover 14. Also, a control panel 11 for enabling the user to input operation and control settings of the washing machine 1 may be mounted on one side of the top cover 14. In the following description, for convenience of description, a portion indicated by an arrow direction of FIG. 1 is assumed to be a front portion of the cabinet 12.

    [0023] FIG. 2 is a cross-sectional view of the washing machine according to the embodiment of the present disclosure.

    [0024] Referring to FIG. 2, in the inside of the cabinet 12 forming the outer appearance of the washing machine 1, a tub 21 in which washing water is stored, a washing drum 22 rotatably disposed in the inside of the tub 21, and a pulsator 23 disposed in the inside of the washing drum 22 to generate a water current may be installed.

    [0025] In the upper portion of the cabinet 12, an opening 24 may be formed to enable a user to put laundry into the washing drum 22. The opening 24 may be opened or closed by the door 10 mounted on the upper portion of the cabinet 12. The tub 21 may be supported on the cabinet 12 by a suspension apparatus 50.

    [0026] In the upper portion of the tub 21, a water-supply pipe 25 may be installed to supply washing water into the tub 21. One end of the water-supply pipe 25 may be connected to an external water-supply source, and the other end of the water-supply pipe 25 may be connected to a detergent supply apparatus 26. Water supplied through the water-supply pipe 25 may be supplied into the tub 21 together with a detergent via the detergent supply apparatus 26. The water-supply pipe 25 may include a water-supply valve 27 to control supply of water.

    [0027] The washing drum 22 may be in the shape of a cylinder whose top portion opens, and a plurality of dehydrating holes may be formed in the side of the washing drum 22. On the top of the washing drum 22, a balancer 29 may be disposed so that the washing drum 22 can stably rotate upon high-speed rotation.

    [0028] Below the tub 21, a motor 30 to generate a driving force for rotating the washing drum 22 and the pulsator 23, and a power transfer apparatus 31 to transfer the driving force generated by the motor 30 to both or one of the washing drum 22 and the pulsator 23 may be disposed.

    [0029] The washing drum 22 may be connected to a hollow dehydrating shaft 32, and a washing shaft 33 installed in the cavity of the dehydrating shaft 32 may be connected to the pulsator 23 through a washing shaft connecting element (not shown). The motor 30 may transfer a driving force to all or one of the washing drum 22 and the pulsator 23 according to elevating operation of the power transfer apparatus 31.

    [0030] The power transfer apparatus 31 may include an actuator 34 to generate a driving force for transferring power, a rod portion 35 to move linearly according to operation of the actuator 34, and a clutch portion 36 connected to the rod portion 35 to rotate according to operation of the rod portion 35.

    [0031] In a bottom of the tub 21, a drain outlet 37 may be formed to discharge washing water stored in the tub 21, and the drain outlet 37 may be connected to a first drain pipe 38. In the first drain pipe 38, a drain valve 39 for controlling drainage may be installed. An outlet of the drain valve 39 may be connected to a second drain pipe 40 for discharging washing water to the outside.

    [0032] FIG. 3 is a perspective view showing a tub, a suspension apparatus, and a position guide apparatus of the washing machine according to the embodiment of the present disclosure, and FIG. 4 is a top view showing the tub, the suspension apparatus, and the position guide apparatus of the washing machine according to the embodiment of the present disclosure.

    [0033] Referring to FIGS. 3 and 4, the suspension apparatus 50 is disposed in the inside of the cabinet (for example, the cabinet 12 of FIG. 1) in order to reduce vibrations of the tub 21. More specifically, the suspension apparatus 50 may be coupled with a first holder 51 disposed on an inner upper surface of the cabinet 12 and a second holder 52 disposed on an outer lower surface of the tub 21 to cushion vibrations and impacts transferred from the tub 21. The first holder 51 and the second holder 52 may be disposed at different positions.

    [0034] The suspension apparatus 50 may include a suspension cap 53, a suspension bar 54, and a spring 55, although not limited to these. The suspension apparatus 50 may add other components or omit some components in order to improve an effect of cushioning vibrations or impacts transferred from the tub 21.

    [0035] The spring 55 may be disposed in a lower portion of the suspension bar 54, and contracted or relaxed by vibrations and impacts transferred from the tub 21, thereby cushioning and reducing the vibrations and impacts.

    [0036] The suspension apparatus 50 may function to reduce all of vibrations generated in a vertical direction (Z-axis) and vibrations generated in a horizontal direction (XY plane) according to an installation angle. Since vector components in the vertical direction are generally greater than in the horizontal direction, the suspension apparatus 50 may have an effect of mainly reducing vibrations generated in the vertical direction.

    [0037] One end of the position guide apparatus 100 may be installed on the tub 21, and the other end of the position guide apparatus 100 may be connected to an area of the suspension bar 54.

    [0038] Since the position guide apparatus 100 limits movements in horizontal direction of the tub 21, the suspension apparatus 50 may be installed nearly vertically to increase the capacity of the tub 21 in the inside of the cabinet 12. Thereby, a range of movement on the XY plane can be reduced even when the tub 21 becomes close to the cabinet 12, so that the position guide apparatus 100 can prevent the tub 21 from contacting the cabinet 12 or prevent the generation of noise.

    [0039] FIG. 5 shows the position guide apparatus of the washing machine according to the embodiment of the present disclosure, and FIG. 6 is a cross-sectional view of the position guide apparatus of the washing machine according to the embodiment of the present disclosure.

    [0040] Referring to FIGS. 5 and 6, the position guide apparatus 100 may include a tub fixing portion 110, a cylinder 120, an absorption member 140, and a suspension bar coupling portion 150.

    [0041] The tub fixing portion 110 may connect the cylinder 120 of the position guide apparatus 100 to the tub 21. In the state in which one end of the tub fixing portion 110 is coupled with a position guide apparatus coupling portion (not shown) formed in the outer surface of the tub 21, the tub fixing portion 110 may be inserted in a tub fixing portion inserting hole 121 formed in one end of the cylinder 120. If the tub fixing portion 110 is inserted in the cylinder 120, the cylinder 120 can rotate on the tub fixing portion 110 as a rotation shaft.

    [0042] In one end of the cylinder 120, the tub fixing portion inserting hole 121 into which the tub fixing portion 110 can be inserted may be formed, and in the other end of the cylinder 120, a stopper inserting hole 122 into which a stopper 130 can be inserted may be formed. The tub fixing portion inserting hole 121 may be formed along the Z axis, and the stopper inserting hole 122 may be formed on the XY plane that is vertical to the Z axis. However, the positions of the tub fixing portion inserting hole 121 and the stopper inserting hole 122 are not limited to these, and the tub fixing portion inserting hole 121 and the stopper inserting hole 122 may be formed at any other positions. The cylinder 120 has a space 123 in which at least one portion of the stopper 130 is can be located. The space 123 in which at least one portion of the stopper 130 is located may extend along an X-axis.

    [0043] At least one portion of the stopper 130 is located in the inside of the cylinder 120, and the remaining portion of the stopper 130 is located outside the cylinder 120. The stopper 130 may move linearly along the inside space 123 of the cylinder 120.

    [0044] In an end of the portion of the stopper (130) located in the inside of the cylinder 120, a catching portion 131 is formed. The catching portion 131 prevents the stopper 130 from getting out of the cylinder 120, when the stopper 130 moves back and forth in the inside space 123 of the cylinder 120.

    [0045] An end of the remaining portion of the stopper 120 located outside the cylinder 120 is connected to the suspension bar coupling portion 150. The suspension bar coupling portion 150 may include a first member 151 having a first accommodating space 152 into which the stopper 130 can be inserted, and a second member 155 having a second accommodating space 156 into which the suspension bar 54 can be inserted.

    [0046] The end of the stopper 130 located outside the cylinder 120 may be inserted in the first accommodating space 152 of the first member 151 of the suspension bar coupling portion 150. The first member 151 may include a hole 153 into which the second member 155 can be inserted. A protrusion 157 of the second member 155 may be coupled with the hole 153 of the first member 151. In this case, the second member 155 may rotate on the protrusion 157. The second member 155 may form the second accommodating space 156. The suspension bar 54 may be inserted into the second accommodating space 156. In the state in which the suspension bar 54 is inserted in the second accommodating space 156, the suspension bar 54 may move along the Z-axis direction.

    [0047] The stopper 130 may include a first absorption member 140a and a second absorption member 140b. The first absorption member 140a may be disposed adjacent to the catching portion 131, and the second absorption member 140b may be disposed adjacent to the suspension bar coupling portion 150. The absorption member 140 may be made of, for example, rubber or silicon. The absorption member 140 may reduce noise that is generated when the cylinder 120 moves linearly to contact the catching portion 131 located at one end of the stopper 130 or the suspension bar coupling portion 150 located at the other end of the stopper 130.

    [0048] A situation in which the first absorption member 140a contacts the inner wall of the cylinder 120 may be a case in which the portion of the stopper 130 located inside the cylinder 120 is drawn outside the cylinder 120 so that the position guide apparatus control apparatus 100 lengthens. A situation in which the second absorption member 140b contacts the outer wall of the cylinder 120 may be a case in which the other portion of the stopper 130 located outside the cylinder 120 is pushed into the inside of the cylinder 120 so that the position guide apparatus 100 shortens. The cylinder 120 may move between a first position at which the position guide apparatus 100 lengthens and a second position at which the position guide apparatus 100 shortens.

    [0049] According to an embodiment, a length to which the cylinder 120 can move according to a movement of the tub 21 may be decided according to the inside space 123 of the cylinder 120 and a distance between the absorption members 140a and 140b disposed at both ends of the stopper 130.

    [0050] FIGS. 7A, 7B, 8A, and 8B are views for describing a situation in which the position guide apparatus lengthens according to a movement of the tub generated in the washing machine according to the embodiment of the present disclosure.

    [0051] According to an embodiment, the tub 21 may include at least one position guide apparatus 100 on the outer surface.

    [0052] Referring to FIG. 7A, the washing machine (for example, the washing machine 1 of FIG. 1) may include four position guide apparatuses 100a, 100b, 100c, and 100d. The four position guide apparatuses 100a, 100b, 100c, and 100d may be installed at intervals of about 90 degrees on the outer surface of the tub 21. As described above with reference to FIGS. 5 and 6, one end of each position guide apparatus 100 may be coupled with the tub 21 in such a way to be rotatable on the Z-axis, and the other end of the position guide apparatus 100 may be coupled with the suspension bar 54 in such a way to be movable along the suspension bar 54.

    [0053] According to an embodiment, in order to efficiently correct a position, the position guide apparatus 100 may be positioned in a direction that is similar to a tangential direction on the outer side surface of the tub 21.

    [0054] In this state, if the washing drum (for example, the washing drum 22 of FIG. 2) starts rotating, the tub 21 may move in left and right directions (on the XY plane), or roll on the Z-axis.

    [0055] More specifically, if the washing machine 1 starts a dehydration course, the washing machine 1 may rotate the washing drum 22. The washing machine 1 may increase revolution per minute (RPM) of the washing drum 22 gradually. For example, the washing machine 1 may increase the RPM of the washing drum 22 from 0rpm to 800rpm. However, the RPM of the washing drum 22 is not limited to these, and the RPM of the washing drum 22 may be greater or smaller than 800 rpm according to the type of the washing machine 1. A section for which the washing machine 1 gradually increases the RPM of the washing drum 22 may be defined as a transient section.

    [0056] According to an embodiment, if the washing drum 22 rotates, the tub 21 may perform six motions. The six motions may include motions in the X-axis, Y-axis, and Z-axis directions and rotational motions on the X-axis, Y-axis, and Z-axis.

    [0057] If the RPM of the washing drum 22 reaches about 100rpm, the tub 21 may perform left-right motions moving in the left and right directions on the XY plane. Also, if the RPM of the washing drum 22 reaches about 250rpm, the tub 21 may perform rolling on the Z-axis. However, the motions of the tub 21 generated according to the rotation of the washing drum 22 are not limited to these, and the tub 21 may perform various motions during the transient section.

    [0058] Referring to FIG. 7B, the tub 21 may move in a positive (+) X-axis direction. In this case, the position guide apparatuses 100a, 100b, 100c, and 100d may lengthen or shorten according to their positions.

    [0059] For example, if the tub 21 moves in the positive (+) X-axis direction, the first position guide apparatus 100a may lengthen, and the third position guide apparatus 100c may shorten. Also, the second position guide apparatus 100b and the fourth position guide apparatus 100d may be maintained at their positions similarly to the state shown in FIG. 7A. However, lengths to which the position guide apparatuses 100a and 100c lengthen and shorten may vary according to the moving direction of the tub 21.

    [0060] Referring to FIG. 8A, the position guide apparatus 100a may lengthen according to a movement of the tub 21. That is, if the cylinder 120 moves in the positive (+) X-axis direction, a portion of the stopper 130 located in the inside of the cylinder 120 may be drawn to the outside of the cylinder 120.

    [0061] Referring to FIG. 8B, if the cylinder 120 further moves in the positive (+) X-axis direction, the first absorption member 140a may contact the inner side surface of the cylinder 120. Accordingly, the cylinder 120 cannot move any longer. The first absorption member 140a may reduce noise due to an impact that is generated when the stopper 130 contacts the inner side surface of the cylinder 120.

    [0062] If the first absorption member 140a contacts the inner side surface of the cylinder 120, the tub 21 cannot move in the positive (+) X-axis direction any longer. As such, the movement of the tub 21 on the XY plane may be limited by the position guide apparatus 100.

    [0063] FIGS. 9A, 9B, 10A, and 10B are views for describing a situation in which the position guide apparatus shortens according to a movement of the tub generated in the washing machine according to the embodiment of the present disclosure.

    [0064] Referring to FIG. 9A, the washing machine (for example, the washing machine 1 of FIG. 1) may include four position guide apparatuses 100a, 100b, 100c, and 100d. The four position guide apparatuses 100a, 100b, 100c, and 100d may be installed at intervals of about 90 degrees on the outer surface of the tub 21. One end of each position guide apparatus 100 may be coupled with the tub 21 in such a way to be rotatable on the Z-axis, and the other end of the position guide apparatus 100 may be coupled with the suspension bar 54 in such a way to be movable along the suspension bar 54.

    [0065] In this state, if the washing drum (for example, the washing drum 22 of FIG. 2) starts rotating, the tub 21 may move in left and right directions (on the XY plane), or roll on the Z-axis.

    [0066] More specifically, if the washing machine (for example, the washing machine 1 of FIG. 1) starts a dehydration course, the washing machine 1 may rotate the washing drum 22. If the washing drum 22 rotates, the tub 21 may perform six motions. The six motions may include motions in the X-axis, Y-axis, and Z-axis directions and rotational motions on the X-axis, Y-axis, and Z-axis.

    [0067] If the RPM of the washing drum 22 reaches about 100rpm, the tub 21 may perform left-right motions moving in the left and right directions on the XY plane. Also, if the RPM of the washing drum 22 reaches about 250rpm, the tub 21 may roll on the Z-axis.

    [0068] Referring to FIG. 9B, the tub 21 may move in a negative (-) X-axis direction. In this case, the position guide apparatuses 100a to 100d may lengthen or shorten according to their positions.

    [0069] For example, if the tub 21 moves in the negative (-) X-axis direction, the first position guide apparatus 100a may shorten, and the third position guide apparatus 100c may lengthen. Also, the second position guide apparatus 100b and the fourth position guide apparatus 100d may be maintained at their positions similarly to the state shown in FIG. 9A. That is, the position guide apparatuses 100a and 100c may lengthen or shorten according to the moving direction of the tub 21.

    [0070] Referring to FIG. 10A, the position guide apparatus 100a may shorten according to a movement of the tub 21. That is, if the cylinder 120 moves in the negative (-) X-axis direction, a portion of the stopper 130 located outside the cylinder 120 may be pushed into the inside of the cylinder 120.

    [0071] Referring to FIG. 10B, if the cylinder 120 further moves in the negative (-) X-axis direction, the second absorption member 140b may contact the outer side surface of the cylinder 120. Accordingly, the cylinder 120 cannot move any longer. The second absorption member 140b can reduce noise due to an impact that is generated when the stopper 130 contacts the outer side surface of the cylinder 120.

    [0072] If the second absorption member 140b contacts the outer side surface of the cylinder 120, the tub 21 cannot move in the negative (-) X-axis direction any longer. In this way, the movement of the tub 21 on the XY plane may be limited by the position guide apparatus 100.

    [0073] So far, movements in X-axis direction of the tub 21 have been described. Also, movements in Y-axis direction of the tub 21 may be limited by the position guide apparatus 100 to be reduced.

    [0074] FIG. 11 is a graph for comparing a case in which the washing machine according to the embodiment includes the position guide apparatus to a case in which the washing machine includes no position guide apparatus.

    [0075] Referring to FIG. 11, in a graph 1100, the X-axis represents a case 1110 in which the position guide apparatus is installed and a case 1120 in which no position guide apparatus is installed, and the Y-axis represents displacements of the tub (for example, the tub 21 of FIG. 2). The graph 1100 shows results of measurement through an experiment of increasing the RPM of the washing drum 22 from 0rpm to 800rpm after installing a weight of 1.0kg inside the washing drum 22.

    [0076] According to an embodiment, in the case 1120 in which no position guide apparatus is installed, the tub 21 may move to a distance of 31.80mm in the left and right directions. In the case 1110 in which the position guide apparatus is installed, the tub 21 may move to a distance of 24.06mm in the left and right directions. Compared to the case 1120 in which no position guide apparatus is installed, the movement distance of the tub 21 may be shortened by 7.74mm in the left and right directions, resulting in a reduction rate of movement of 24.3%.

    [0077] As such, the movement of the tub 21 according to the rotation of the washing machine 22 can be reduced by the position guide apparatus 100 described above.

    [0078] FIGS. 12A and 12B are views for describing a situation in which the position guide apparatus prevents vibrations of the tub from being transferred to the cabinet in the washing machine according to the embodiment of the present disclosure.

    [0079] Referring to FIG. 12A, the washing machine (for example, the washing machine 1 of FIG. 1) may include four position guide apparatuses 100a, 100b, 100c, and 100d. The four position guide apparatuses 100a, 100b, 100c, and 100d may be installed at intervals of about 90 degrees on the outer surface of the tub 21. As described above with reference to FIGS. 5 and 6, one end of each position guide apparatus 100 may be coupled with the tub 21 in such a way to be rotatable on the Z-axis, and the other end of the position guide apparatus 100 may be coupled with the suspension bar 54 in such a way to be movable along the suspension bar 54.

    [0080] As described above with reference to FIGS. 7A to 10B, if the washing drum (for example, the washing drum 22 of FIG. 2) starts rotating in this state, the tub 21 may move in the left and right directions, or roll on the Z-axis.

    [0081] Also, according to an embodiment, if the RPM of the washing drum 22 is maintained at 800rpm, the movement of the tub 21 may be reduced. A section for which the washing drum 22 is maintained at constant RPM after a transient section elapses may be defined as, for example, a steady section. During the steady section, a phenomenon in which the tub 21 moves in the left and right directions may be reduced, however, vibrations generated from the tub 21 may be transferred to the cabinet (for example, the cabinet 12 of FIG. 1) so that the cabinet 12 may vibrate.

    [0082] The position guide apparatus 100 may move the stopper 130 located in the inside of the cylinder 120 to prevent vibrations generated from the tub 21 from being transferred to the cabinet 12.

    [0083] Referring to FIG. 12B, if the stopper 130 moves linearly in the inside of the cylinder 120 according to a movement of the cylinder 120, no member for adding a friction force for limiting the movement of the stopper 130 may exist in the inside space 123 of the cylinder 120. Accordingly, during the steady section, the cylinder 120 may move along the X-axis without contacting either the first absorption member 140a or the second absorption member 140b so as not to transfer vibrations generated from the tub 21 to the suspension bar 54. Accordingly, the position guide apparatus 100 may not transfer vibrations generated from the tub 21 to the cabinet 12 connected to the suspension bar 54.

    [0084] FIG. 13 is a graph for comparing a case in which the washing machine according to the embodiment includes the position guide apparatus to a case in which the washing machine includes no position guide apparatus.

    [0085] Referring to FIG. 13, in a graph 1310, the X-axis represents cases 1320, 1340, and 1360 in which the position guide apparatus is installed according to locations of the cabinet (for example, the cabinet 12 of FIG. 1) at which vibrations are measured and cases 1330, 1350, and 1370 in which no position guide apparatus is installed, and the Y-axis represents displacements of the cabinet 12. The graph 1310 shows results of measurement through an experiment of rotating the washing drum (for example, the washing drum 22 of FIG. 2) at 800rpm after installing a weight of 1.0kg inside the washing drum 22.

    [0086] According to an embodiment, with respect to an upper center portion of the cabinet 22, in the case 1330 in which no position guide apparatus is installed, the cabinet 12 may vibrate to 0.46mm in the left and right directions. In the case 1320 in which the position guide apparatus is installed, the cabinet 12 may vibrate to 0.37mm in the left and right directions. Compared to the case 1330 in which no position guide apparatus is installed, the vibrations of the cabinet 12 may be reduced by 19%.

    [0087] With respect to a left center portion of the cabinet 12, in the case 1350 in which no position guide apparatus is installed, the cabinet 12 may vibrate to 0.25mm in the left and right directions. In the case 1340 in which the position guide apparatus is installed, the cabinet 12 may vibrate to 0.28mm in the left and right directions. Compared to the case 1350 in which no position guide apparatus is installed, the vibrations of the cabinet 12 may increase by 12%.

    [0088] With respect to a left upper portion of the cabinet 12, in the case 1370 in which no position guide apparatus is installed, the cabinet 12 may vibrate to 0.19mm in the left and right directions. In the case 1360 in which the position guide apparatus is installed, the cabinet 12 may vibrate to 0.17mm in the left and right directions. Compared to the case 1370 in which no position guide apparatus is installed, the vibrations of the cabinet 12 may be reduced by 10%.

    [0089] Comparing the cases 1320, 1340, and 1360 in which the position guide apparatus is installed at various locations of the cabinet 12 to the cases 1330, 1350, and 1370 in which no position guide apparatus is installed, it can be seen that the vibration of the cabinet 12 increases or decreases after the position guide apparatus 100 is installed. However, the vibration of the cabinet 12 may have no great difference from a typical level of vibration. That is, installing the position guide apparatus 100 may have no great influence on the vibration of the cabinet 12.

    [0090] As such, during the steady section, the position guide apparatus 100 may not transfer vibrations generated from the tub 21 to the suspension bar 54, and accordingly, the position guide apparatus 100 may not transfer vibrations generated from the tub 21 to the cabinet 12 connected to the suspension bar 54.

    [0091] FIG. 14 is a perspective view showing another embodiment of a position guide apparatus included in a washing machine according to an embodiment of the present disclosure.

    [0092] The basic configuration of the position guide apparatus has been described above with reference to FIGS. 5 and 6. Accordingly, redundant descriptions will be omitted, and differences between the position guide apparatus and the above-described position guide apparatus will be described.

    [0093] According to an embodiment, the stopper 130 may include a first absorption member 1410 and a second absorption member 1420. Both the first absorption member 1410 and the second absorption member 1420 may be located in the inside of the cylinder 120. The first absorption member 1410 and the second absorption member 1420 may be respectively located before and behind the catching portion 131.

    [0094] According to an embodiment, since both the absorption members 1410 and 1420 are located in the inside of the cylinder 120, it is possible to prevent cases in which the performance of the absorption members 1410 and 1420 deteriorates or the absorption members 1410 and 1420 are damaged due to outside moisture, etc. The absorption members 1410 and 1420 may be made of, for example, rubber or silicon. The absorption members 1410 and 1420 may reduce impact noise generated when the stopper 130 moves linearly along the stopper inserting hole 122 to contact the cylinder 120

    [0095] A situation in which the first absorption member 140 approaches close to a first inner wall 1430 of the cylinder 120 may be a case in which the position guide apparatus 100 lengthens, and a situation in which the second absorption member 1420 approaches close to a second inner wall 1440 of the cylinder 120 may be a case in which the position guide apparatus 100 shortens.

    [0096] FIGS. 15A and 15B show a tub, a suspension apparatus, and a position guide apparatus of a washing machine according to another embodiment of the present disclosure.

    [0097] The tub and the suspension apparatus shown in FIG. 15A are the same as the tub 21 and the suspension apparatus 50 described above with reference to FIG. 3, and accordingly, detailed descriptions thereof will be omitted.

    [0098] Referring to FIG. 15A, a position guide apparatus 1500 may be installed at a location that is similar to that of the position guide apparatus 100 described above with reference to FIG. 3. At least one position guide apparatus 1500 may be installed on the outer surface of the tub 21.

    [0099] One end of the position guide apparatus 1500 may be installed on the tub 21, and the other end of the position guide apparatus 1500 may be connected to an area of the suspension bar 54 included in the suspension apparatus 50.

    [0100] FIG. 15B is a side view showing the tub 21, the suspension apparatus 50, and the position guide apparatus 1500 of the washing machine (for example, the washing machine 1 of FIG. 1).

    [0101] Referring to FIG. 15B, the position guide apparatus 1500 may be coupled with the tub 21 using a tub coupling rod 1540. For example, the position guide apparatus 1500 may be coupled with the tub 21 by inserting the tub coupling rod 1540 into a tub coupling rod inserting hole 1520 formed in one end of the position guide apparatus 1500 at a position guide apparatus coupling portion 1590.

    [0102] More specifically, the position guide apparatus coupling portion 1590 may include a first member 1591 and a second member 1592 respectively having holes into which the tub coupling rod 1540 can be inserted. The tub coupling rod inserting hole 1520 of the position guide apparatus 1500 may be located between the first member 1591 and the second member 1592 of the position guide apparatus coupling portion 1590, and the tub coupling rod 1540 may be inserted into the first member 1591, the tub coupling rod inserting hole 1520, and the second member 1592 so that the position guide apparatus 1500 can be coupled with the tub 21.

    [0103] The first member 1591 and the second member 1592 may be coupled with the outer surface of the tub 21 at an angle of 20 degrees to 40 degrees on the XY plane. Accordingly, the position guide apparatus 1500 inserted between the first member 1591 and the second member 1592 and coupled with the position guide apparatus coupling apparatus 1590 may also be coupled with the tub 21 at the angle of 20 degrees to 40 degrees on the XY plane.

    [0104] FIGS. 16A and 16B show a position guide apparatus according to an embodiment of the present disclosure.

    [0105] FIG. 16A is a perspective view of the position guide apparatus 1500. FIG. 16B is a cross-sectional view of the position guide apparatus 1500.

    [0106] Referring to FIG. 16A, the position guide apparatus 1500 may include a transversely moving portion 1510 and a longitudinally moving portion 1530.

    [0107] According to an embodiment, one end of the transversely moving portion 1510 may include a pair of arms 1512. The pair of arms 1512 may include openings 1514, respectively. The openings 1514 may extend in a direction toward the arms 1512 from a center of the transversely moving portion 1510.

    [0108] The longitudinally moving portion 1530 may be coupled with the transversely moving portion 1510 through the openings 1514 formed in the arms 1512. For example, by inserting a pair of protrusions 1533 formed on the outer surface of the longitudinally moving portion 1530 into the openings 1514 of the transversely moving portion 1510, the longitudinally moving portion 1510 can be coupled with the transversely moving portion 1510.

    [0109] The other end of the transversely moving portion 1510 may include a tub coupling rod inserting hole 1520 for coupling with the tub 21. According to an embodiment, the transversely moving portion 1510 may have a thinner thickness or a narrower width at an area in which the tub coupling rod inserting hole 1520 of the transversely moving portion 1510 is formed, than the other area.

    [0110] The transversely moving portion 1510 may be coupled with the tub 21 using the tub coupling rod 1540. For example, referring to FIG. 15B, the tub coupling rod inserting hole 1520 of the transversely moving portion 1510 may be positioned between the first member 1591 and the second member 1592 of the position guide apparatus coupling portion 1590. In this state, the tub coupling rod 1540 may be inserted in the order of the first member 1591 of the position guide apparatus coupling portion 1590, the tub coupling rod inserting hole 1520, and the second member 1592 of the position guide apparatus coupling portion 1590. Thereby, the transversely moving portion 1510 may be coupled with the tub 21 in such a way to be rotatable on the tub coupling rod 1540.

    [0111] According to an embodiment, a rubber bearing 1522 may be disposed between the tub coupling rob 1540 and the tub coupling rob inserting hole 1520. The rubber bearing 1522 may reduce a friction force that is generated when the transversely moving portion 1510 rotates on the tub coupling rod 1540.

    [0112] Referring to FIG. 16B, a friction member 1534 may be included in the inside of the transversely moving portion 1530. The transversely moving portion 1530 may provide a suspension bar inserting passage 1535 into which the suspension bar 54 can be inserted through coupling of a first member 1531 and a second member 1532. Thereby, the transversely moving portion 1530 may move along the suspension bar 54.

    [0113] According to an embodiment, the transversely moving portion 1530 may provide a friction member inserting space 1536 surrounding an area of the suspension bar inserting passage 1535. For example, the friction member inserting space 1536 may be formed in the inside of the transversely moving portion 1530 such that the diameter of the friction member inserting space 1536 is greater than that of the suspension bar inserting passage 1535 having a circular cross section.

    [0114] The friction member 1534 may be filled in at least one area of the friction member inserting space 1536. The friction member 1534 may be disposed in the friction member inserting space 1536 in such a way to surround a part of the suspension bar 54. If the suspension bar 54 is inserted into the longitudinally moving portion 1530, the friction member 1534 may contact the suspension bar 54. Thereby, when the longitudinally moving portion 1530 moves along the suspension bar 54, kinetic energy of the longitudinally moving portion 1530 can be reduced by a friction force that is generated between the friction member 1534 and the suspension bar 54. That is, a movement distance of the longitudinally moving portion 1530 can be reduced compared to when no friction member 1534 exists.

    [0115] According to an embodiment, the friction member 1534 may be filled in the friction member insertion space 1536 without being fixed. Also, the friction member 1534 may be filled in an area of the friction member inserting portion 1536.

    [0116] In this case, for example, when the longitudinally moving portion 1530 moves downward along the suspension bar 54, the friction member 1534 may contact the suspension bar 54 so as not to move in the friction member inserting space 1536. In this case, the longitudinally moving portion 1530 can move without any limitation due to a friction force of the friction member 1534.

    [0117] If the longitudinally moving portion 1530 continues to move downward along the suspension bar 54 until the friction member 1534 contacts an inner end of the friction member inserting space 1536, the friction member 1534 may move together with the longitudinally moving portion 1530. In this case, the longitudinally moving portion 1530 may be limited in moving due to a friction force generated between the friction member 1534 and the suspension bar 54. As a result, a movement distance of the longitudinally moving portion 1530 may be reduced compared to when no friction member 1534 exists. A distance to which the longitudinally moving portion 1530 can move without any limitation due to a friction force between the friction member 1534 and the suspension bar 54 may depend on a length of an area in which the friction member 1534 is not filled in the friction member inserting space 1536.

    [0118] FIGS. 17A, 17B, 17C, and 17D are views for describing movements of the tub when the washing machine according to the embodiment of the present disclosure performs a washing course.

    [0119] If a washing course starts, the tub 21 may move in the left and right directions (in X- and Y-axis directions).

    [0120] More specifically, if the washing machine (for example, the washing machine 1 of FIG. 1) starts a dehydration course, the washing machine 1 may rotate the washing drum (for example, the washing drum 22 of FIG. 2). The washing machine 1 may increase the RPM of the washing drum 22 gradually. For example, the washing machine 1 may increase the RMP of the washing drum 22 from 0rpm to 800rpm. A section for which the washing machine 1 gradually increases the RPM of the washing drum 22 may be defined as, for example, a transient section.

    [0121] If the RPM of the washing drum 22 reaches about 100rpm, the tub 21 may move in the left and right directions on the XY plane.

    [0122] FIG. 17A shows positions of the tub 21, the position guide apparatus (that is, a first position guide apparatus 1500a and a second position guide apparatus 1500b) 1500, and the suspension apparatus 50 before a movement occurs. Hereinafter, movements of the position guide apparatus 1500 will be described using the first position guide apparatus 1500a and the second position guide apparatus 1500b.

    [0123] FIG. 17B shows a case in which the tub 21 moves in the positive (+) X-axis direction.

    [0124] Referring to FIGS. 17A and 17B, if the tub 21 moves, the first position guide apparatus 1500a and the second position guide apparatus 1500b coupled with the tub 21 may move. For example, if a transversely moving portion 1510a included in the first position guide apparatus 1500a may move in the positive (+) X-axis direction, and a longitudinally moving portion 1530a included in the first position guide apparatus 1500a may move downward (a negative (-) Z-axis direction) along the suspension bar 54.

    [0125] Also, a transversely moving portion 1510b included in the second position guide apparatus 1500b may move in the positive (+) X-axis direction, and a longitudinally moving portion 1530b included in the second position guide apparatus 1500b may move upward (a positive (+) Z-axis direction) along the suspension bar 54.

    [0126] During a washing course, the tub 21 may move up and down so that a rolling phenomenon in which the tub 21 rotates on the Z-axis can occur.

    [0127] If the washing drum 22 starts rotating, the tub 21 may roll. For example, if the RPM of the washing drum 22 reaches about 250rpm, the tub 21 may move up and down so that the tub 21 rotates on the Z-axis, and accordingly, a rolling phenomenon in which the upper portion of the tub 21 is tilted may occur. As a result, the tub 21 may move in the left and right directions (XY plane) and in the up and down directions (Z-axis).

    [0128] FIG. 17C shows positions of the tub 21, the position guide apparatus 1500, and the suspension bar 54 before a movement occurs.

    [0129] FIG. 17D shows a case in which the upper portion of the tub 21 is tilted to the left on the Z-axis.

    [0130] Referring to FIGS. 17C and 17D, if the upper portion of the tub 21 is tilted, the first position guide apparatus 1500a and the second position guide apparatus 1500b coupled with the tub 21 may also move. For example, the transversely moving portion 1510a included in the first position guide apparatus 1500a may move in the negative (-) X-axis direction, and the longitudinally moving portion 1530a may move upward (positive (+) Z-axis direction) along the suspension bar 54.

    [0131] Also, the transversely moving portion 1510b included in the second position guide apparatus 1500b may move in the negative (-) X-axis direction, and the longitudinally moving portion 1530b may move downward (negative (-) Z-axis direction) along the suspension bar 54.

    [0132] As described above with reference to FIGS. 17A to 17D, the longitudinally moving portion 1530 included in the position guide apparatus 1500 may move along the suspension bar 54 according to a movement of the tub 21. At this time, a movement distance of the tub 21 may be reduced by the friction member 1534 included in the longitudinally moving portion 1530. That is, kinetic energy due to a movement of the tub 21 may be reduced by the position guide apparatus 1500. As a result, during the washing course, the tub 21 can be prevented from colliding with the cabinet 12 surrounding the tub 21.

    [0133] Hereinafter, details about movements of the position guide apparatus 1500 for reducing movements of the tub 21 will be described.

    [0134] FIGS. 18A, 18B, 18C, 18D, and 18E are views for describing a process in which a position guide apparatus according to an embodiment of the present disclosure reduces a movement distance of the tub.

    [0135] Referring to FIG. 18A, an angle α formed between the transversely moving portion 1510 coupled with the tub (for example, the tub 21 of FIG. 15) and the longitudinally moving portion 1530 coupled with the suspension bar 54 may exceed 90 degrees. For example, the angle α formed between the transversely moving portion 1510 and the longitudinally moving portion 1530 may be an angle between about 120 degrees and about 140 degrees.

    [0136] If the transversely moving portion 1510 moves (for example, in the left and right directions), the longitudinally moving portion 1530 can easily move toward the upper or lower portion of the suspension bar 54 along the suspension bar 54 since the transversely moving portion 1510 and the longitudinally moving portion 1530 form an obtuse angle. That is, since the transversely moving portion 1510 and the longitudinally moving portion 1530 form an obtuse angle, it is possible to reduce a probability that the suspension bar 54 gets bent by the longitudinally moving portion 1530 when the transversely moving portion 1510 moves so that the longitudinally moving portion 1530 becomes immovable.

    [0137] In order to cause the transversely moving portion 1510 and the longitudinally moving portion 1530 to form an obtuse angle, as described above with reference to FIGS. 15A and 15B, the first member 1591 and the second member 1592 of the position guide apparatus coupling portion 1590 between which the tub coupling rod inserting hole 1520 of the position guide apparatus 1500 is positioned may form an angle of 20 degrees to 40 degrees with respect to the X-axis.

    [0138] FIG. 18A shows a state in which the tub 21 is immovable, like FIG. 17A. In this case, the protrusions 1533 formed on the outer surface of the longitudinally moving portion 1530 and inserted into the openings 1514 of the transversely moving portion 1510 may be positioned in the center of the openings 1514. That is, the protrusions 1533 may be in non-contact with one ends or the other ends of the inner surfaces of the openings 1514.

    [0139] According to an embodiment, if the tub 21 moves in the positive (+) X-axis direction, the position guide apparatus 1500 may also move in the positive (+) X-axis direction.

    [0140] Referring to FIG. 18B, if the transversely moving portion 1510 of the position guide apparatus 1500 moves in the positive (+) X-axis direction, the protrusions 1533 formed on the outer surface of the longitudinally moving portion 1530 may contact one ends of the openings 1514 formed in the arms 1512 of the transversely moving portion 1510.

    [0141] Referring to FIG. 18C, if the transversely moving portion 1510 of the position guide apparatus 1500 continues to move in the positive (+) X-axis direction, one ends of the openings 1414 may transfer kinetic energy generated by a movement of the tub 21 to the protrusions 1533. Due to the kinetic energy transferred to the protrusions 1533, the longitudinally moving portion 1530 may move to the upper portion of the suspension bar 54 along the suspension bar 54.

    [0142] In this case, as described above with reference to FIG. 16B, the longitudinally moving portion 153 may include the friction member 1534 therein. The friction member 1534 may reduce the kinetic energy generated from the tub 21 and transferred to the longitudinally moving portion 1530. Accordingly, a movement distance of the tub 21 can be reduced compared to when no friction member 1534 exists, and the tub 21 can be prevented from colliding with the cabinet (for example, the cabinet 12 of FIG. 1) outside the tub 21.

    [0143] According to another embodiment, if the tub 21 moves in the negative (-) X-axis direction, the position guide apparatus 1500 may also move in the negative (-) X-axis direction.

    [0144] Referring to FIG. 18D, if the transversely moving portion 1510 of the position guide apparatus 1500 moves in the negative (-) X-axis direction, the protrusions 1533 formed on the outer surfaces of the longitudinally moving portion 1530 may contact the other ends of the openings 1514 formed in the arms 1512 of the transversely moving portion 1510.

    [0145] Referring to FIG. 18E, if the transversely moving portion 1510 of the position guide apparatus 1500 continues to move in the negative (-) X-axis direction, the other ends of the openings 1514 may transfer kinetic energy generated by the movement of the tub 21 to the protrusions 1533. Due to the kinetic energy transferred to the protrusions 1533, the longitudinally moving portion 1530 may move to the lower portion of the suspension bar 54 along the suspension bar 54.

    [0146] In this case, as described above, the friction member 1534 may function to reduce the kinetic energy generated by the tub 21 and transferred to the longitudinally moving portion 1530. Accordingly, a movement distance of the tub 21 can be reduced compared to when no friction member 1534 exists, and the tub 21 can be prevented from colliding with the cabinet 12 outside the tub 21.

    [0147] FIGS. 19A and 19B are graphs for comparing a case in which the position guide apparatus according to the embodiment is installed in the washing machine to a case in which no position guide apparatus is installed in the washing machine.

    [0148] FIG. 19A is a graph for comparing movements in the X- and Y-axis directions, and FIG. 19B is a graph for comparing movements in the Z-axis direction.

    [0149] In the graph of FIG. 19A, the X-axis represents a case 1910 in which the position guide apparatus is installed and a case 1920 in which no position guide apparatus is installed, and the Y-axis represents an amount of movement of the tub (for example, the tub 21 of FIG. 2). The graph of FIG. 19A shows results of measurement through an experiment of increasing the RPM of the washing drum (for example, the washing drum 22 of FIG. 2) from 0rpm to 800rpm after installing a weight of 1.2kg inside the washing drum 22.

    [0150] Referring to FIG. 19A, in the case 1920 in which no position guide apparatus is installed, the tub 21 may move to a distance of 32.5mm in the left and right directions. In the case 1910 in which the position guide apparatus is installed, the tub 21 may move to a distance of 17.7mm in the left and right directions. Compared to the case 1920 in which no position guide apparatus is installed, the movement distance of the tub 21 may be shortened by 14.8mm in the left and right directions, resulting in a reduction rate of movement of 46%.

    [0151] Referring to FIG. 19A, in the case 1940 in which no position guide apparatus is installed, the tub 21 may move to a distance of 20.2mm in the front and back directions. In the case 1930 in which the position guide apparatus is installed, the tub 21 may move to a distance of 16.7 mm in the front and back directions. Compared to the case 1940 in which no position guide apparatus is installed, the movement distance of the tub 21 may be shortened by 3.5mm in the front and back directions, resulting in a reduction rate of movement of 17%.

    [0152] Referring to FIG. 19B, in a case 1960 in which no position guide apparatus is installed, the tub 21 may move to a distance of 6.3mm in the up and down directions. In the case 1950 in which the position guide apparatus is installed, the tub 21 may move to a distance of 4.8mm in the up and down directions. Compared to the case 1960 in which no position guide apparatus is installed, the movement distance of the tub 21 may be shortened by 1.5mm in the up and down directions, resulting in a reduction rate of movement of 24%.

    [0153] FIG. 20 is a view for describing a situation in which the position guide apparatus prevents vibrations of the tub from being transferred to the cabinet in the washing machine according to the embodiment of the present disclosure.

    [0154] During a washing course, if the washing drum (for example, the washing machine 22 of FIG. 2) is maintained at 800rpm, the movement of the tub 21 may be reduced. A section for which the washing drum 22 is maintained at constant RPM after a transient section elapses may be defined as a steady section.

    [0155] During the steady section, a phenomenon in which the tub 21 moves in the left and right directions may be reduced, however, vibrations generated from the tub 21 may be transferred to the cabinet (for example, the cabinet 12 of FIG. 1) so that the cabinet 12 may vibrate.

    [0156] At this time, the position guide apparatus 1500 may prevent vibrations of the tub 21 from being transferred to the cabinet 12.

    [0157] Referring to FIG. 20, if the RPM of the washing machine 22 reaches 800rpm, the protrusions 1533 of the longitudinally moving portion 1530 may move in the openings 1514 of the transversely moving portion 1510 without contacting one ends or the other ends of the openings 1514. In the insides of the openings 1514, no friction member for limiting the movements of the protrusions 1533 may exist. Accordingly, during the steady section, vibrations of the tub 21 may be not transferred to the longitudinally moving portion 1530. As a result, the position guide apparatus 1500 may not transfer vibrations of the tub 21 to the cabinet 12 connected to the suspension bar 54.

    [0158] FIG. 21 is a graph for comparing a case in which the position guide apparatus is installed in the washing machine according to the embodiment to a case in which no position guide apparatus is installed in the washing machine.

    [0159] Referring to FIG. 21, in a graph 2100, the X-axis represents a case in which the position guide apparatus is installed, and a case in which no position guide apparatus is installed, according to positions of the cabinet (for example, the cabinet 12 of FIG. 1) from which vibrations are measured, and the Y-axis represents movement distances of the cabinet 12. The graph 2100 shows results of measurement through an experiment of rotating the washing drum (for example, the washing drum 22 of FIG. 2) at 800rpm after installing a weight of 1.2kg inside the washing drum 22.

    [0160] According to an embodiment, in a case 2110 in which no position guide apparatus is installed, the cabinet 12 may vibrate to a distance of 0.84mm in the left and right directions, with respect to a right center portion of the cabinet 12. In a case 2120 in which the position guide apparatus is installed, the cabinet 12 may vibrate to a distance to 0.73mm in the left and right directions. Compared to the case 2110 in which no position guide apparatus is installed, vibrations of the cabinet 12 may be reduced by 13%.

    [0161] In a case 2150 in which no position guide apparatus is installed, the cabinet 12 may vibrate to a distance of 0.16mm in the left and right directions, with respect to a left upper corner of the cabinet 12. In a case 2160 in which the position guide apparatus is installed, the cabinet 12 may vibrate to a distance of 0.15mm in the left and right directions. Compared to the case 2170 in which no position guide apparatus is installed, vibrations of the cabinet 12 may be reduced by 6%.

    [0162] With respect to a left center portion of the cabinet 12, the same level of vibrations may be generated in both a case 2130 in which no position guide apparatus is installed and a case 2140 in which the position guide apparatus is installed.

    [0163] As such, during the steady section, the position guide apparatus 1500 may not transfer vibrations generated from the tub 21 to the suspension bar 54, and accordingly, the position guide apparatus 1500 may also not transfer the vibrations generated from the tub 21 to the cabinet 12 connected to the suspension bar 54.

    [0164] FIG. 22 is a perspective view showing another embodiment of a transversely moving portion included in the position guide apparatus according to the embodiment.

    [0165] The basic configuration of a position guide apparatus 1501 according to another embodiment is the same as that of the position guide apparatus 1500 of FIG. 15, and accordingly, in the following description, differences between the position guide apparatus 1501 and the position guide apparatus 1500 will be described.

    [0166] According to an embodiment, a first absorption member 2221 and a second absorption member 2222 may be disposed in one ends and the other ends of openings 2220 formed in a transversely moving portion 2210. The first absorption member 2221 and the second absorption member 2222 may be formed of, for example, rubber or silicon. The first absorption member 2221 and the second absorption member 2222 may cushion an impact that is generated when protrusions 2230 move along the openings 2220 to contact one ends and the other ends of the openings 2220.

    [0167] FIGS. 23A and 23B show another embodiment of a longitudinally moving portion included in the position guide apparatus according to the embodiment.

    [0168] Referring to FIGS. 23A and 23B, a longitudinally moving portion 2330 according to another embodiment may have a structure configured by coupling a first member 2331 with a second member 2335 to form an insertion passage into which the suspension bar 54 can be inserted.

    [0169] According to another embodiment, the first member 2331 may include a pair of arms 2334, and in the pair of arms 2334, a pair of catching grooves 2332 may be formed to be coupled with a pair of protrusions 2336 formed in the second member 2335.

    [0170] The second member 2335 may be inserted between the pair of arms 2334 included in the first member 2331 so that the protrusions 2336 of the second member 2335 are coupled with the catching grooves 2332 of the first member 2331, and the first member 2331 is coupled with the second member 2335 to function as the longitudinally moving portion 2330.

    [0171] A pair of protrusions 2333 may be formed on the outer surface of the second member 2335. The protrusions 2333 may be inserted into openings 2314 formed in a transversely moving portion 2310 to couple the longitudinally moving portion 2330 with the transversely moving portion 2310.

    [0172] The longitudinally moving portion 2330 may include a friction member inserting space 2340 surrounding an area of a suspension bar inserting passage 2339 formed therein. That is, the friction member inserting space 2340 may be formed in the inside of the longitudinally moving portion 2330 such that the friction member inserting space 2340 has a diameter that is greater than that of the suspension bar inserting passage 2339 having a circular cross-section.

    [0173] In at least one area of the friction member inserting space 2340, a friction member 2341 may be filled. The friction member 2341 may be disposed in the friction member inserting space 2340 to surround a part of the suspension bar 54. If the suspension bar 54 is inserted into the longitudinally moving portion 2330, the friction member 2341 may contact the suspension bar 54. Accordingly, when the longitudinally moving portion 2330 moves along the suspension bar 54, kinetic energy of the longitudinally moving portion 2330 can be reduced by a friction force of the friction member 2341. That is, a movement distance of the longitudinally moving portion 1530 can be reduced compared to when no friction member 2341 exists.

    [0174] According to an embodiment, the friction member 2341 may be filled in the friction member inserting space 2340 without being fixed. Also, the friction member 2341 may be filled in an area of the friction member inserting space 2340.

    [0175] In this case, for example, when the longitudinally moving portion 2330 moves downward along the suspension bar 54, the friction member 2341 may contact the suspension bar 54 so as not to move in the friction member inserting space 2340. In this case, the longitudinally moving portion 2330 can move without any limitation due to a friction force of the friction member 2341.

    [0176] If the longitudinally moving portion 2330 continues to move downward along the suspension bar 54 until the friction member 2341 contacts an inner end of the friction member inserting space 2340, the friction member 2341 may move together with the longitudinally moving portion 2330. In this case, the longitudinally moving portion 2330 may be limited in moving due to a friction force generated between the friction member 2341 and the suspension bar 54. As a result, a movement distance of the longitudinally moving portion 2330 may be reduced compared to when no friction member 2341 exists.

    [0177] Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles of the disclosure, the scope of which is defined in the claims and their equivalents.


    Claims

    1. A washing machine (1) comprising:

    a cabinet (12);

    a tub (21) disposed in the inside of the cabinet;

    at least one suspension apparatus (50) configured to reduce vibrations of the tub (21), and to connect the tub (21) to the cabinet (12) such that the tub (21) is supported by the cabinet (12); and

    a position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) having one end connected to the at least one suspension apparatus (50), and another end of the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) connected to the tub (21), the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) being configured to limit a movement range of the tub (21) in a horizontal direction,

    wherein the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) comprises:

    a cylinder (120) having an inside space (123); and

    a stopper (130) having at least one portion located in the inside space of the cylinder, and a remaining portion of the stopper (130) being located outside the cylinder,

    wherein the stopper (130) includes a catching portion (131) at one end of the at least one portion of the stopper (130) located in the inside space of the cylinder (120), wherein the catching portion (131) prevents the stopper from getting out of the cylinder (120), when the stopper (130) moves back and forth in the inside space (123) of the cylinder (120),

    the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) includes a suspension bar coupling portion (150) provided at one end of the remaining portion of the stopper (130) located outside the cylinder (120), and

    the suspension bar coupling portion (150) is connected to a suspension bar (54) included in the at least one suspension apparatus (50),

    characterized in that

    the stopper (130) further includes a first absorption member (140a) disposed adjacent to the catching portion (131), and

    the stopper (130) further includes a second absorption member (140b) disposed adjacent to the suspension bar coupling portion (150).
    [


     
    2. The washing machine (1) according to claim 1, wherein
    one end of the cylinder (120) includes a stopper inserting hole into which the at least one portion of the stopper (130) is inserted,
    another end of the cylinder (120) includes a tub fixing hole, and
    the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) further includes a tub fixing portion that is configured to be inserted into the tub fixing hole such that both ends of the tub fixing portion are rotatably coupled with a position guide apparatus coupling portion formed in an outer surface of the tub (21).
     
    3.  The washing machine (1) according to claim 2, wherein the tub fixing portion is configured to be inserted into the cylinder (120) such that the cylinder (120) is rotatable on the tub fixing portion as a rotation shaft.
     
    4. The washing machine (1) according to claim 1, wherein the cylinder (120) is movable between a first position at which the cylinder (120) contacts the first absorption member (2221) and a second position at which the cylinder (120) contacts the second absorption member (2222).
     
    5. The washing machine (1) according to claim 1, wherein
    the suspension bar coupling portion includes a first member having a first accommodating space (152) into which the stopper (130) is configured to be inserted, and
    the suspension bar coupling portion further includes a second member having a second accommodating space (156) into which the suspension bar is configured to be inserted.
     
    6. The washing machine (1) according to claim 5, wherein the second member (155) further includes a protrusion (157), and the first member (151) further includes a hole (153) into which the protrusion of the second member is configured to be inserted so that the second member (155) is coupled with the first member (151) to be rotatable with respect to the first member using the protrusion as a rotation shaft.
     
    7.  The washing machine (1) according to claim 5, wherein the second accommodating space (156) is movable along the suspension bar.
     
    8. A washing machine (1) comprising:

    a cabinet (12);

    a tub (21) disposed in the inside of the cabinet;

    at least one suspension apparatus (50) configured to reduce vibrations of the tub (21), and to connect the tub (21) to the cabinet (12) such that the tub (21) is supported by the cabinet (12); and

    a position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) having one end connected to the at least one suspension apparatus (50), and another end of the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) connected to the tub (21), the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) being configured to limit a movement range of the tub (21) in a horizontal direction,

    wherein the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) comprises:

    a cylinder (120) having an inside space; and

    a stopper (130) having at least one portion located in the inside space of the cylinder, and a remaining portion of the stopper (130) being located outside the cylinder,

    wherein the stopper (130) includes a catching portion (131) at one end of the at least one portion of the stopper (130) located in the inside space of the cylinder (120), wherein the catching portion (131) prevents the stopper (130) from getting out of the cylinder (120), when the stopper (130) moves back and forth in the inside space (123) of the cylinder (120),

    the position guide apparatus (100, 100a, 100b, 100c, 100d, 1500, 1501) includes a suspension bar coupling portion (150) provided at one end of the remaining portion of the stopper (130) located outside the cylinder (120), and

    the suspension bar coupling portion (150) is connected to a suspension bar (54) included in the at least one suspension apparatus (50),

    characterized in that

    the stopper (130) further includes a first absorption member (1410) disposed on one surface with respect to the catching portion (131), and

    the stopper (130) further includes a second absorption member (1420) disposed on a surface opposite the one surface with respect to the catching portion (131).


     
    9. The washing machine (1) according to claim 1, wherein the position guide apparatus (1500, 1501) is configured to limit a distance between the at least one suspension apparatus and the tub (21) to a predetermined distance.
     


    Ansprüche

    1. Waschmaschine (1), umfassend:

    ein Gehäuse°(12);

    eine innerhalb des Gehäuses angeordnete Wanne (21);

    mindestens eine Aufhängungsvorrichtung (50), die dazu ausgestaltet ist, Vibrationen der Wanne (21) zu reduzieren und die Wanne (21) so mit dem Gehäuse (12) zu verbinden, dass die Wanne (21) von dem Gehäuse (12) getragen wird; und

    eine Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) mit einem mit der mindestens einen Aufhängungsvorrichtung (50) verbundenen Ende und einem weiteren mit der Wanne (21) verbundenen Ende der Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501), wobei die Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) dazu ausgestaltet ist, einen Bewegungsbereich der Wanne (21) in einer horizontalen Richtung zu beschränken,

    wobei die Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) Folgendes umfasst:

    einen Zylinder (120) mit einem Innenraum (123); und

    einen Anschlag (130) mit mindestens einem in dem Innenraum des Zylinders befindlichen Abschnitt und einem verbleibenden außerhalb des Zylinders befindlichen Abschnitt des Anschlags (130), wobei der Anschlag (130) einen Eingriffsabschnitt (131) an einem Ende des mindestens einen in dem Innenraum des Zylinders (120) befindlichen Abschnitt des Anschlags (130) umfasst, wobei der Eingriffsabschnitt (131) den Anschlag daran hindert, aus dem Zylinder (120) auszutreten, wenn der Anschlag (130) sich in dem Innenraum (123) des Zylinders (120) vor und zurück bewegt,

    die Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) einen Aufhängestangenkopplungsabschnitt (150) umfasst, der an einem Ende des verbleibenden außerhalb des Zylinders (120) befindlichen Abschnitts des Anschlags (130) vorgesehen ist, und

    der Aufhängestangenkopplungsabschnitt (150) mit einer in der mindestens einen Aufhängungsvorrichtung (50) enthaltenen Aufhängestange (54) verbunden ist,

    dadurch gekennzeichnet, dass

    der Anschlag (130) ferner ein erstes Absorptionsteil (140a) umfasst, das dem Eingriffsabschnitt (131) benachbart angeordnet ist, und

    der Anschlag (130) ferner ein zweites Absorptionsteil (140b) umfasst, das dem Aufhängestangenkopplungsabschnitt (150) benachbart angeordnet ist.


     
    2. Waschmaschine (1) nach Anspruch 1, wobei
    ein Ende des Zylinders (120) ein Anschlageinsetzloch umfasst, in das der mindestens eine Abschnitt des Anschlags (130) eingesetzt wird,
    ein weiteres Ende des Zylinders (120) ein Wannenbefestigungsloch umfasst und
    die Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) ferner einen Wannenbefestigungsabschnitt umfasst, der dazu ausgestaltet ist, so in das Wannenbefestigungsloch eingesetzt zu werden, dass beide Enden des Wannenbefestigungsabschnittes drehbar mit einem in einer Außenfläche der Wanne (21) ausgebildeten Positionierungsvorrichtungskopplungsabschnitt gekoppelt werden.
     
    3. Waschmaschine (1) nach Anspruch 2, wobei der Wannenbefestigungsabschnitt dazu ausgestaltet ist, so in den Zylinder (120) eingesetzt zu werden, dass der Zylinder (120) auf dem Wannenbefestigungsabschnitt als eine Drehwelle drehbar ist.
     
    4. Waschmaschine (1) nach Anspruch 1, wobei der Zylinder (120) zwischen einer ersten Position, in der der Zylinder (120) mit dem ersten Absorptionsteil (2221) in Kontakt steht, und einer zweiten Position, in der der Zylinder (120) mit dem zweiten Absorptionsteil (2222) in Kontakt steht, bewegbar ist.
     
    5. Waschmaschine (1) nach Anspruch 1, wobei
    der Aufhängestangenkopplungsabschnitt ein erstes Teil umfasst, das einen ersten Aufnahmeraum (152) aufweist, wobei der Anschlag (130) zum Einsetzen in diesen ausgestaltet ist, und
    der Aufhängestangenkopplungsabschnitt ferner ein zweites Teil umfasst, das einen zweiten Aufnahmeraum (156) aufweist, wobei die Aufhängestange zum Einsetzen in diesen ausgestaltet ist.
     
    6. Waschmaschine (1) nach Anspruch 5, wobei das zweite Teil (155) ferner einen Vorsprung (157) umfasst und das erste Teil (151) ferner ein Loch (153) umfasst, wobei der Vorsprung des zweiten Teiles dazu ausgestaltet ist, so in dieses eingesetzt zu werden, dass das zweite Teil (155) mit dem ersten Teil (151) gekoppelt ist, um in Bezug auf das erste Teil unter Verwendung des Vorsprungs als eine Drehwelle drehbar zu sein.
     
    7. Waschmaschine (1) nach Anspruch 5, wobei der zweite Aufnahmeraum (156) entlang der Aufhängestange bewegbar ist.
     
    8.  Waschmaschine (1), umfassend:

    ein Gehäuse°(12);

    eine innerhalb des Gehäuses angeordnete Wanne (21);

    mindestens eine Aufhängungsvorrichtung (50), die dazu ausgestaltet ist, Vibrationen der Wanne (21) zu reduzieren und die Wanne (21) so mit dem Gehäuse (12) zu verbinden, dass die Wanne (21) von dem Gehäuse (12) getragen wird; und

    eine Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) mit einem mit der mindestens einen Aufhängungsvorrichtung (50) verbundenen Ende und einem weiteren mit der Wanne (21) verbundenen Ende der Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501),

    wobei die Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) dazu ausgestaltet ist, einen Bewegungsbereich der Wanne (21) in einer horizontalen Richtung zu beschränken,

    wobei die Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) Folgendes umfasst:

    einen Zylinder (120) mit einem Innenraum; und

    einen Anschlag (130) mit mindestens einem in dem Innenraum des Zylinders befindlichen Abschnitt und einem verbleibenden außerhalb des Zylinders befindlichen Abschnitt des Anschlags (130),

    wobei der Anschlag (130) einen Eingriffsabschnitt (131) an einem Ende des mindestens einen in dem Innenraum des Zylinders (120) befindlichen Abschnitt des Anschlags (130) umfasst, wobei der Eingriffsabschnitt (131) den Anschlag (130) daran hindert, aus dem Zylinder (120) auszutreten, wenn der Anschlag (130) sich in dem Innenraum (123) des Zylinders (120) vor und zurück bewegt,

    die Positionierungsvorrichtung (100, 100a, 100b, 100c, 100d, 1500, 1501) einen Aufhängestangenkopplungsabschnitt (150) umfasst, der an einem Ende des verbleibenden außerhalb des Zylinders (120) befindlichen Abschnitts des Anschlags (130) vorgesehen ist, und

    der Aufhängestangenkopplungsabschnitt (150) mit einer in der mindestens einen Aufhängungsvorrichtung (50) enthaltenen Aufhängestange (54) verbunden ist,

    dadurch gekennzeichnet, dass

    der Anschlag (130) ferner ein auf einer Oberfläche in Bezug zu dem Eingriffsabschnitt (131) angeordnetes erstes Absorptionsteil (1410) umfasst und

    der Anschlag (130) ferner ein auf einer der einen Oberfläche in Bezug zu dem Eingriffsabschnitt (131) gegenüberliegenden Oberfläche angeordnetes zweites Absorptionsteil (1420) umfasst.


     
    9.  Waschmaschine (1) nach Anspruch 1, wobei die Positionierungsvorrichtung (1500, 1501) dazu ausgestaltet ist, einen Abstand zwischen der mindestens einen Aufhängungsvorrichtung und der Wanne (21) auf einen vorbestimmten Abstand zu beschränken.
     


    Revendications

    1. Machine à laver (1) comprenant :

    une armoire (12) ;

    une cuve (21) disposée à l'intérieur de l'armoire ;

    au moins un dispositif de suspension (50) conçu pour réduire les vibrations de la cuve (21), et pour relier la cuve (21) à l'armoire (12) de telle sorte que la cuve (21) est soutenue par l'armoire (12) ; et

    un dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) comportant une extrémité reliée à au moins un dispositif de suspension (50), et une autre extrémité du dispositif de guidage de position (100, 100a, 100b, 1000, 100d, 1500, 1501) reliée à la cuve (21), le dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) étant conçu pour limiter l'amplitude de mouvement de la cuve (21) dans le sens horizontal,

    où le dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) comprend :

    un cylindre (120) comportant un espace intérieur (123) ; et

    un butoir (130) comportant au moins une partie située dans l'espace intérieur du cylindre, et une partie restante du butoir (130) située à l'extérieur du cylindre,

    où le butoir (130) comprend une partie de retenue (131) à l'extrémité d'au moins une partie du butoir (130) située dans l'espace intérieur du cylindre (120), où la partie de retenue (131) empêche le butoir de sortir du cylindre (120), lorsque le butoir (130) se déplace d'avant en arrière dans l'espace intérieur (123) du cylindre (120),

    le dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) comprend une partie de couplage de la barre de suspension (150) prévue à une extrémité de la partie restante du butoir (130) située à l'extérieur du cylindre (120), et

    la partie de couplage de la barre de suspension (150) est reliée à une barre de suspension (54) comprise dans au moins un dispositif de suspension (50),

    caractérisée en ce que

    le butoir (130) comprend en outre un premier élément d'absorption (140a) disposé à côté de la partie de retenue (131), et

    le butoir (130) comprend en outre un second élément d'absorption (140b) disposé à côté de la partie de couplage de la barre de suspension (150).


     
    2. Machine à laver (1) selon la revendication 1, où
    une extrémité du cylindre (120) comprend un trou d'insertion du butoir dans lequel au moins une partie du butoir (130) est insérée,
    une autre extrémité du cylindre (120) comprend un trou de fixation de la cuve, et
    le dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) comprend en outre une partie de fixation de la cuve qui est conçue pour être insérée dans le trou de fixation de la cuve de telle sorte que les deux extrémités de la partie de fixation de la cuve sont couplées de manière rotative à une partie de couplage du dispositif de guidage de position formée sur une surface extérieure de la cuve (21).
     
    3. Machine à laver (1) selon la revendication 2, où la partie de fixation de la cuve
    est conçue pour être insérée dans le cylindre (120) de telle sorte que le cylindre (120) tourne sur la partie de fixation de la cuve comme un arbre de rotation.
     
    4. Machine à laver (1) selon la revendication 1, où le cylindre (120) est
    mobile entre une première position dans laquelle le cylindre (120) est en contact avec le premier élément d'absorption (2221) et une seconde position dans laquelle le cylindre (120) est en contact avec le second élément d'absorption (2222).
     
    5. Machine à laver (1) selon la revendication 1, où
    la partie de couplage de la barre de suspension comprend un premier élément comportant un premier espace de réception (152) dans lequel le butoir (130) est conçu pour être inséré, et
    la partie de couplage de la barre de suspension comprend en outre un second élément comportant un second espace de réception (156) dans lequel la barre de suspension est conçue pour être insérée.
     
    6. Machine à laver (1) selon la revendication 5, où le second élément (155) comprend en outre une protubérance (157), et le premier élément (151) comprend en outre
    un trou (153) dans lequel la protubérance du second élément est conçue pour être insérée de sorte que le second élément (155) est couplé au premier élément (151) pour tourner par rapport au premier élément en utilisant la protubérance comme un arbre de rotation.
     
    7. Machine à laver (1) selon la revendication 5, où le second espace de réception (156) est mobile le long de la barre de suspension.
     
    8. Machine à laver (1) comprenant :

    une armoire (12) ;

    une cuve (21) disposée à l'intérieur de l'armoire ;

    au moins un dispositif de suspension (50) conçu pour réduire les vibrations de la cuve (21), et pour relier la cuve (21) à l'armoire (12) de telle sorte que la cuve (21) est soutenue par l'armoire (12) ; et

    un dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) comportant une extrémité reliée à au moins un dispositif de suspension (50), et une autre extrémité du dispositif de guidage de position (100, 100a, 100b, 1000, 100d, 1500, 1501) reliée à la cuve (21), le dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) étant conçu pour limiter l'amplitude de mouvement de la cuve (21) dans le sens horizontal,

    où le dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) comprend :

    un cylindre (120) comportant un espace intérieur ; et

    un butoir (130) comportant au moins une partie située dans l'espace intérieur du cylindre, et une partie restante du butoir (130) située à l'extérieur du cylindre,

    où le butoir (130) comprend une partie de retenue (131) à l'extrémité d'au moins une partie du butoir (130) située dans l'espace intérieur du cylindre (120), où la partie de retenue (131) empêche le butoir (130) de sortir du cylindre (120), lorsque le butoir (130) se déplace d'avant en arrière dans l'espace intérieur (123) du cylindre (120),

    le dispositif de guidage de position (100, 100a, 100b, 100c, 100d, 1500, 1501) comprend une partie de couplage de la barre de suspension (150) prévue à une extrémité de la partie restante du butoir (130) située à l'extérieur du cylindre (120), et

    la partie de couplage de la barre de suspension (150) est reliée à une barre de suspension (54) comprise dans au moins un dispositif de suspension (50),

    caractérisée en ce que

    le butoir (130) comprend en outre un premier élément d'absorption (1410) disposé sur une première surface par rapport à la partie de retenue (131), et

    le butoir (130) comprend en outre un second élément d'absorption (1420) disposé sur une surface opposée à la première surface par rapport à la partie de retenue (131).


     
    9. Machine à laver (1) selon la revendication 1, où le dispositif de guidage de position (1500, 1501) est conçu pour limiter une distance entre au moins un dispositif de suspension et la cuve (21) à une distance prédéterminée.
     




    Drawing













































































    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description