(19)
(11)EP 3 342 615 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
13.05.2020 Bulletin 2020/20

(21)Application number: 17208830.4

(22)Date of filing:  20.12.2017
(51)Int. Cl.: 
B60K 7/00  (2006.01)
B62D 51/00  (2006.01)
B60K 17/04  (2006.01)

(54)

SPEED REDUCING DEVICE FOR CARRIAGE AND DRIVING DEVICE FOR CARRIAGE

GESCHWINDIGKEITSVERRINGERUNGSVORRICHTUNG FÜR WAGEN UND ANTRIEBSVORRICHTUNG FÜR WAGEN

DISPOSITIF DE RÉDUCTION DE VITESSE POUR CHARIOT ET DISPOSITIF D'ENTRAÎNEMENT DE CHARIOT


(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: 27.12.2016 JP 2016253897

(43)Date of publication of application:
04.07.2018 Bulletin 2018/27

(73)Proprietor: NABTESCO CORPORATION
Chiyoda-ku Tokyo (JP)

(72)Inventors:
  • WATANABE, Koji
    Tsu-shi, Mie (JP)
  • DOZAKI, Ryutaro
    Mie, Mie (JP)

(74)Representative: Grünecker Patent- und Rechtsanwälte PartG mbB 
Leopoldstraße 4
80802 München
80802 München (DE)


(56)References cited: : 
EP-A2- 1 403 118
GB-A- 1 455 069
US-A- 3 704 759
WO-A1-2012/042806
JP-A- 2010 078 131
  
      
    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] The present invention relates to a speed reducing device for a carriage in which wheels can be detachably attached.

    BACKGROUND



    [0002] Carriages propelled by motors are widely used in various applications. Not only manned controlled carriages but also unmanned carriages such as Rail Guided Vehicles (RGVs) and Automatic Guided Vehicles (AGVs) are known. Outputs of motors in these carriages are transmitted to wheels via reducers and the carriages travel.

    [0003] For example, Patent Literature 1 discloses a driving device for wheels using a planetary gear mechanism. In this driving device, a speed reducer is provided in the wheel to downsize and simplify the device. Patent Literature 2 discloses a special planetary gear reducer. In this reducer, a space for storing a pin for an external gear is reduced, and the speed reducer as a whole is downsized. Patent Literature 3 discloses a driving wheel mechanism for an unmanned vehicle. With this driving wheel mechanism, drive wheels are reduced in size while ensuring sufficient load bearing performance, and the height and width of the unmanned vehicle are reduced.

    [0004] Furthermore, JP 2010 078131 A discloses a driving wheel comprising a transmission in a wheel, and that the wheel connects an electric motor to the transmission. The electric motor and a brake are coaxially connected to the transmission. In addition, a pressure removing can which is connected to a case body of the transmission through a pipe. The pressure removing is provided with a transparent hole exposed to atmospheric air.

    [0005] GB 1 455 069 A discloses a hub and tyre, forming a wheel of a forklift truck, are driven by an electric motor secured to a steerable flange. The sun gear is formed by teeth on the motor shaft and drives double planet gears, each mounted on a fixed stud. The gears mesh with further gears each mounted on a stud and driving the hub by means of a ring gear. Discs shaped to engage studs are interleaved with discs engaging the teeth. The brake is applied by counter-clockwise pivoting of a bell crank acting through a pin and thrust member.

    [0006] EP 1 403 118 A2 discloses a compact wheel motor drive arrangement for applications on such construction equipment as scissor lifts and other similar scaffolding equipment where hydraulically driven systems have historically been used to provide power to the wheels to move the equipment is disclosed. The invention of EP 1 403 118 A2 includes an electric motor mounted to a spindle bracket which is pivotably connected to the frame of the equipment to allow the unit to be pivoted around a vertical axis for steering purposes. A gear reducing planetary gear system is mounted around the drive shaft of the motor is positioned within the rotating wheel hub. The output ring gear of the planetary gear system is integrally formed to the interior of the wheel hub so that there is a direct application through the planetary gear system to the wheel hub to provide greater efficiency.

    [0007] WO 2012/042806 A1 relates to a drive wheel structure for a transportation carriage which travels by the rotational drive of an electric motor. The drive wheel structure is provided with a frame body which supports the vehicle body of the transportation carriage and enables the transportation carriage to perform transportation, and the frame body is provided with a rotation body which is rotationally driven in the advance direction. The rotation body incorporates a reduction gear into which the rotation of the electric motor is inputted and which is covered with a case body. The input side of the reduction gear is disposed at one end of the frame body and is supported by a bearing provided with a seal. The output side which protrudes from the reduction gear is disposed at the other end of the frame body and is supported by a bearing provided with a seal. The drive wheel structure is characterized in that a wheel is fitted over the outer peripheral surface of the rotation body, a tire is formed on the outer periphery of the wheel to enable the vehicle body to travel, and seal members are provided to the bearings, which are located at the one end and the other end, so as to be located on the side from which oil flows to the outside

    [0008] US 3 704 759 A discloses that the outer rotor of a statorless electric drive motor and the drive wheel of an electric fork-lift truck or similar vehicle to be powered thereby are each directly connected to the outer motor case or housing. The housing is mounted for rotation with respect to the vehicle body. The central gear of a speed-reducing planetary gear set is affixed to the shaft of the inner rotor. The satellite or, alternatively, the annular ring gear of the set is directly connected to the rotatable motor housing, while the other of such annular or satellite gears is affixed to the body of the vehicle to immobilize such latter gear against rotation. Such an arrangement avoids the necessity of separate rotational connections among the inner and outer rotors and the drive wheel.

    RELEVANT REFERENCES


    LIST OF RELEVANT PATENT LITERATURE



    [0009] 

    Patent Literature 1: Japanese Utility Model Application Publication No. Sho 62-59348

    Patent Literature 2: Japanese Utility Model Application Publication No. Hei 1-65969

    Patent Literature 3: Japanese Patent Application Publication No. 2000-233649


    SUMMARY



    [0010] In the above-described carriages, a wheel is attached to a turning portion of the reducer. In order to replace wheels of such a carriage, it was necessary to detach the entire drive unit that includes the wheels and the speed reducers from the carriage body, or to disassemble the speed reducer. Moreover, when replacing a brake unit of the carriage, it was necessary to detach the entire drive unit that includes the wheels and the speed reducers from the carriage body. Thus, removal and replacement of the wheels and the brake unit in the conventional carriages were extremely time consuming tasks.

    [0011] For example, in the driving device described in Patent Literature 1, an internal gear of the speed reducer and the like are disposed between an inner cover and an outer cover of a wheel. Accordingly, it is not possible for this driving device to remove only the wheel. To remove the wheel, it is necessary to disassemble the speed reducer. Moreover, to remove the wheel and a turning annulus (or a tire), it is necessary to remove a part or the whole of the frame that surrounds the wheel and the turning annulus. When a part or the whole of this frame is removed, a bearing provided on the outer side of the wheel (especially an outer cover) are exposed, which is not desirable. Furthermore, unless the bearing is removed, the wheel and the turning annulus cannot be removed.

    [0012] As for the speed reducer described in Patent Literature 2, since the turning portion (i.e., the case) of the reducer and the wheel are integrally formed, it is structurally impossible to separate only the wheel from the reducer. Even if the tire can be separated from the wheel, in order to remove the tire, it is necessary to further remove a housing and a side plate that surround the tire. However, since components of the reducer such as pins are supported by the side plate, it is structurally inevitable that the reducer is disassembled when the side plate is removed. It is not practical to replace only the tire while the wheel is attached to the carriage body. The tire is usually removed together with the wheel to replace the tire.

    [0013] As for the mechanism described in Patent Literature 3, a disk-shaped transmission plate is attached to an output portion of the reducer with a bolt, a wheel is attached to the outer peripheral edge of the transmission plate by bolts, and a holder ring is attached to the wheel. Therefore, in order to detach the wheel, these bolts have to be removed to detach the transmission plate and separate the wheel from the holder ring, which is time-consuming and troublesome. Moreover, when the wheel is removed, the bearing provided between a main bracket and the wheel is exposed, which is undesirable. Further, in the mechanism of Patent Literature 3, since the transmission plate is provided so as to cover the reducer on the outside of the carriage body and rotates together with the output portion of the reducer, it is impossible to attach a device such as a brake unit to the transmission plate, which is inconvenient.

    [0014] In view of the above, one object of the invention is to provide a speed reducing device for carriage and a driving device for a carriage in which wheels can be easily detached. Another object of the invention is to provide a speed reducing device for carriage and a driving device for a carriage in which a brake unit can be easily detached.

    [0015] One aspect of the invention relates to a driving device for a carriage. The driving device includes a speed reducing device that is supported by a carriage body, reduces a speed of rotation input thereto and outputs the rotation from an output element; a wheel detachably attached to the output element of the speed reducing device; a flange directly or indirectly supported by the carriage body; and characterized in that a brake unit retained by the flange for braking the wheel. The brake unit and the wheel are detachable from the output element by moving the brake unit and the wheel toward one side along a rotation axis of the output element while the speed reducing device is retained on the output element.

    [0016] The speed reducing device includes a carrier supported in a stationary state with respect to the carriage body; a case to which a wheel is detachably attached and which serves as the output element; a reducer that is supported by the carrier, reduces a speed of rotation input thereto and transmits the rotation to the case to rotate the case. The case may be situated on the outer side of the carrier and the reducer in the radial direction perpendicular to the rotation axis. The wheel may be situated outside the case in the radial direction.

    [0017] The speed reducing device may be fixed to the carriage body and may further include the base coupled to the carrier from the other side along the rotation axis.

    [0018] Further included may be a motor disposed on the other side along the rotation axis with respect to the speed reducing device, and an input shaft that transmits rotation of the motor to the reducer, penetrates the carrier and reaches to the brake unit.

    [0019] Another aspect of the invention relates to a speed reducing device for a carriage. The speed reducing device includes: a base fixed to a carriage body; a carrier fixed to the base; a case to which a wheel is detachably attached; a reducer that is supported by the carrier, decelerates power input thereto, and transmits the power to the case to rotate the case; and a flange fixed to the base or the carriage body and separately provided from the carrier. The flange supports a brake unit that is for braking the power input to the reducer.

    [0020] The flange may be provided such that it does not hold the case.

    [0021] The flange may be formed separately from the case.

    [0022] The speed reducing device for a carriage may further include a first bearing disposed between the carrier and the case, and a seal portion for sealing a space surrounded by the base and the case. The reducer, the carrier and the first bearing may be disposed in the space sealed by the seal portion.

    [0023] The speed reducing device for a carriage may further include an input shaft for inputting power to the reducer. The input shaft is provided so as to penetrate the space in a rotation axis direction in which a rotation axis of the case extends. The speed reducing device may further include a second bearing disposed between the input shaft and the case, and a third bearing disposed between the input shaft and the base. The second bearing and the third bearing are disposed in the space sealed by the seal portion. The seal portion may include a first seal element for sealing between the base or the carrier and the case, a second seal element for sealing between the case and the input shaft, and a third seal element for sealing between the base and the input shaft.

    [0024] The brake unit may be provided at a portion of the input shaft that protrudes out from the space sealed by the seal portion toward one side, and a motor may be provided at a portion of the input shaft that protrudes out from the space sealed by the seal portion toward the other side.

    [0025] The flange may be detachably provided on the base or the carriage body on one side of the reducer in a rotation axis direction in which a rotation axis of the case extends. The case may have an attachment portion that projects in a direction perpendicular to the rotation axis. A part of the wheel located on the one side in the rotation axis direction compared to the attachment portion may be attached on the attachment portion. Only the attachment portion of the case may overlap the wheel with respect to the rotation axis direction.

    [0026] According to the aspects of the invention, it is possible to easily detach the wheel. Moreover, it is possible to easily replace the brake unit according to the aspects of the invention.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0027] Fig. 1 illustrates a carriage according to an embodiment of the invention.

    DESCRIPTION OF THE EMBODIMENTS



    [0028] With reference to the accompanying drawings, the following describes one embodiment of the invention. The accompanying drawings are schematically illustrated and the components of the drawings are not necessarily drawn to scale, and the dimensional ratio between the elements and shapes of the components may be different from the actual ones. However, with the schematic drawings accompanied with the specification, the embodiment described below and other embodiments of the invention would be sufficiently understood by one of ordinary skill in the art.

    [0029] Fig. 1 illustrates a carriage 10 according to an embodiment of the invention. Fig. 1 partially illustrates the carriage 10 as viewed from the side and cross-sections of some components of the carriage 10 are shown.

    [0030] The carriage 10 includes a carriage body 15 and a driving device 12 supported by the carriage body 15. The driving device 12 includes a speed reducing device 11 and a motor 19. The motor 19 is coupled to the speed reducing device 11. A power output by the motor 19 is transmitted to a wheel 16 via the speed reducing device 11, which rotationally drives a tire 17 retained on the wheel 16.

    [0031] The speed reducing device 11 includes a base 21 fixed to the carriage body 15 by a fixing member 51 such as a bolt, a carrier 22 fixed to the base 21 by a fixing member 57, and a reducer 24 supported by the carrier 22. The carrier 22 is supported unrotatably with respect to the carriage body 15, and is supported in a stationary state with respect to the carriage body 15.

    [0032] The reducer 24 reduces a rotational speed of a power that is input from an input shaft 27 and transmits the power with an increased torque to a case 23, which rotates the case 23. In the speed reducing device 11, the case 23 serves as an output element that outputs decelerated rotation. The reducer 24 may be typically configured as a planetary gear speed reducer or an eccentric oscillating type speed reducer, the configuration of the reducer 24 is not particularly limited. The reducer 24 may be constituted by a deceleration structure in which the planetary gear speed reducer and the eccentric oscillating type speed reducer are combined, or the reducer 24 may be constituted by any other type of deceleration mechanism.

    [0033] The case 23 rotatably engages with an output portion 24a of the reducer 24 and is rotated around a rotation axis Ax in accordance with the power transmitted from the output portion 24a of the reducer 24. The wheel 16 is detachably attached to the case 23, and the case 23 rotates in conjunction with the wheel 16 and the tire 17. The case 23 has an attachment portion 35, and a protruding portion of the wheel 16 is fixed to the attachment portion 35 by a fixing member 55. The attachment portion 35 is provided so as to project in a radial direction D2 which is perpendicular to the rotation axis Ax in the case 23. The wheel 16 is disposed on one side S1 (that is, the side toward the outer side of the carriage body) of the attachment portion 35 with respect to the rotation axis direction D1 and the wheel 16 is fixed to the attachment portion 35. Specifically, a part of the wheel 16 located on the one side S1 in the rotation axis direction compared to the attachment portion 35 is attached on the attachment portion 35. The case 23 is situated on the outer side of the carrier 22 and the reducer 24 in the radial direction D2, that is, the case 23 is situated at a longer distance from the rotation axis Ax in the radial direction D2 compared to the carrier 22 and the reducer 24. The wheel 16 is situated outside the case 23 in the radial direction D2. The rotation axis direction D1 here is the direction in which the rotation axis Ax of the case 23 extends. In the embodiment, a motor output shaft 20, the input shaft 27, the case 23, the wheel 16 and the tire 17 are rotated about the common rotation axis Ax.

    [0034] Only the attachment portion 35 of the case 23 overlaps the wheel 16 with respect to the rotation axis direction D1. Therefore, when the wheel 16 is detached from the attachment portion 35 and moved it to the one side S1 for replacement of the wheel 16 and the tire 17, the case 23 does not inhibit the movement of the wheel 16 and the tire 17 so that the wheel 16 and the tire 17 can be smoothly removed from the carriage 10. The wheel 16 and the tire 17 shown in Fig. 1 are overlapped with only a flange 25 and the fixing member 55 when the wheel 16 and the tire 17 are attached to the case 23 on the one side S1 (that is, the outer side of the carriage body) in the rotation axis direction D1. When the flange 25 and the fixing member 55 are removed, the wheel 16 and the tire 17 do not overlap with other components of the carriage 10. Therefore, after the flange 25 is detached from the carriage body 15 together with a brake unit 18 which will be later described, it is possible to detach the wheel 16 from the speed reducing device 11 by moving the wheel to the one side in the rotation axis direction D1 while the case 23 that serves as the output element remains attached to the speed reducing device 11.

    [0035] The base 21 fixed to the carriage body 15 is coupled to the carrier 22 from the other side in the rotation axis direction D1. Further, the motor 19 is also disposed on the other side in the rotation axis direction D1 with respect to the speed reducing device 11. Therefore, when the wheel 16 is removed from the case 23 by moving the wheel 16 to the one side in the rotation axis direction D1, the motor 19 and the base 21 do not interfere with the wheel 16.

    [0036] The case 23 of the embodiment is formed by coupling a cylindrical member 23a that extends mainly in the rotation axis direction D1 with a disk-shaped member 23b that extends mainly in the radial direction D2 by using a fixing member 56. As shown in Fig. 1, a through hole 37 extending in the rotation axis direction D1 is formed in the central portion of the disk-shaped member 23b as viewed in the radial direction D2. The input shaft 27 penetrates the through hole 37. The case 23 with the above-described configuration defines an internal space S together with the base 21. Referring to Fig. 1, the right side (that is, the one side S1), the upper side and the lower side of the internal space S are defined by the case 23, and the left side (that is, the other side S2) of the internal space S is defined by the base 21.

    [0037] The internal space S surrounded by the base 21 and the case 23 is sealed by a seal portion 40. The seal portion 40 in the embodiment includes a first seal element 41 that seals between the base 21 or the carrier 22 and the case 23, a second seal element 42 that seals between the case 23 and the input shaft 27, and a third sealing element 43 that seals between the base 21 and the input shaft 27. The reducer 24, the carrier 22, and the bearings (a first bearing 31, a second bearing 32 and a third bearing 33 which will be described later) are disposed within the internal space S that is sealed and enclosed by the seal portion 40. The reducer 24, the carrier 22, and the bearings are not exposed to the outside of the case 23 and the outside of the base 21.

    [0038] The first bearing 31 is disposed between the carrier 22 and the case 23. In the speed reducing device shown in Fig. 1, two pairs of the first bearings 31 are provided, and the first bearings 31 are arranged so as to be separated from each other with respect to the rotation axis direction D1. In this way, the case 23 (in particular, the cylindrical member 23a) is supported by the carrier 22 in the radial direction D2 and the case can rotate independently from the carrier 22 that remains stationary.

    [0039] The second bearing 32 is disposed between the input shaft 27 and the case 23, and the third bearing 33 is disposed between the input shaft 27 and the base 21. Accordingly, the input shaft 27 is supported by the base 21 and the case 23 in the radial direction D2, and the input shaft 27 can rotate irrespective of states of the base 21 and the case 23.

    [0040] The flange 25 provided separately from the carrier 22 is fixed to the base 21 by a fixing member 52. The flange 25 of this embodiment is detachably provided on the base 21, and is disposed on the outer side of the carriage body (that is, the one side S1) rather than at the reducer 24 and the case 23 in the rotation axis direction D1. The flange 25 is provided separately from the case 23 as a separate body, and does not hold the case 23. Moreover, the flange 25 is provided so as to support the brake unit 18 that is for braking the power input to the reducer 24 from the input shaft 27. The brake unit 18 shown in Fig. 1 is attached to the flange 25 by a fixing member 53.

    [0041] The input shaft 27 that serves as an input gear for inputting the power to the reducer 24 is provided so as to penetrate the internal space S in the rotation axis direction D1 and pass through the through hole 37 formed in the case 23 and a through hole 38 formed in the base 21. An end portion of the input shaft 27 on the one side S1 (that is, on the outer side of the carriage body) penetrates the flange 25 and penetrates at least a part of the brake unit 18. On the other hand, an end portion of the input shaft 27 on the other side S2 reaches to a position where it can be coupled to a motor output shaft 20. In the embodiment, the brake unit 18 hampers the rotation of the input shaft 27, and eventually the wheel 16 can be stopped.

    [0042] Configuration of the brake unit 18 is not specifically limited, but the brake unit 18 may typically have an electromagnetic brake structure. For example, a brake disc is fixed to the input shaft 27 so as to rotate in conjunction with the input shaft 27. The position of an armature that is biased toward the brake disc by a spring is changed by ON/OFF of energization of an electromagnetic coil. Such an electromagnetic brake structure capable of turning ON/OFF of a frictional engagement between the armature and the brake disc. The brake unit 18 can adopt this electromagnetic brake structure. The brake unit 18 shown in Fig. 1 is configured by combining two sections, and these sections are fixed together by a fixing member 54.

    [0043] The motor 19 is detachably attached to the base 21 by a fixing member (not shown). Further, the motor output shaft 20 is detachably attached to one end of the input shaft 27 (the end on the other side S2 in Fig. 1). Therefore, the motor 19 and the motor output shaft 20 can be replaced when necessary. The motor output shaft 20 and the input shaft 27 coupled to each other rotate together around the rotation axis Ax, and the rotational power output from the motor 19 is transmitted to the input shaft 27.

    [0044] According to the carriage 10 and the speed reducing device 11 that have the above-described configuration, the wheel 16 is cantilever-supported via the speed reducing device 11 so that it is easy to replace the wheel 16 and the tire 17 by removing them from the outer side of the carriage body (from the one side S1). Moreover, the brake unit 18 is provided at the portion of the input shaft 27 where protrudes out from the internal space S that is sealed by the seal portion 40 toward the one side S1. The motor 19 is provided at the portion of the input shaft 27 that protrudes out from the internal space S that is sealed by the seal portion 40 toward the other side S2. By using the input shaft 27 having such a structure, it is possible to realize both the "cantilever mechanism of the wheel 16" and the "mechanism in which the brake unit 18 is disposed on the outer side of the carriage body (that is, the one side S1)." Further, by adopting the structure in which a braking force is directly applied from the brake unit 18 to the input shaft 27, it is possible to stop the input shaft 27 with a relatively small brake torque and to put a brake on the wheel 16.

    [0045] Since the bearing is not disposed between the case 23 and the flange 25, it is possible to detach the flange 25 together with the brake unit 18 from the base 21 without disassembling the speed reducing device 11 and while the wheel remains attached to the speed reducing device 11. By further removing the flange 25 from the base 21, an operator is able to attach or detach the wheel 16 and the tire 17 from/to the outer side of the carriage body S1. Therefore the operator can easily replace the wheel 16 and the tire 17.

    [0046] Moreover, since the brake unit 18 is attached to the flange 25, the brake unit 18 can be easily installed or removed to/from the outer side of the carriage body S1, which is highly convenient.

    [0047] Further, the internal space S surrounded by the base 21 and the case 23 is sealed from the outside by the seal portion 40 (that is, the first seal element 41, the second seal element 42, and the third seal element 43). This prevents the outside air and foreign substances from entering into the internal space S and prevents oil or the like from flowing out from the internal space S to the outside. Therefore, it is possible to protect the carrier 22, the reducer 24 and the bearings (the first bearing 31, the second bearing 32, and the third bearing 33) disposed in the inner space S from the outside air, and it is also possible to protect the components disposed outside such as the wheel 16 and the tire 17 from oil and the like in the internal space S. In particular, even when the flange 25 is detached from the base 21, since the carrier 22, the reducer 24 and the bearings are not exposed to the outside, attachment and detachment of the wheel 16 and the tire 17 to/from the case 23 can be performed without contaminating each component with oil or the like.

    [0048] It should be noted that the above-described carriage 10 is applicable to all kinds of carriages in which power from the motor 19 is transmitted to the wheel 16 via the speed reducing device 11. For example, the speed reducing device 11 and the carriage 10 of the invention can be applied not only to carriages that require assistance by an operator when traveling but also to carriages (i.e., an unmanned conveyance vehicle) such as AGVs or RGVs that do not require assistance by an operator when travelling.


    Claims

    1. A speed reducing device (11) for a carriage (10), comprising:

    a base (21) fixed to a carriage body (15);

    a carrier (22) fixed to the base (21);

    a case (23) to which a wheel (16) is detachably attached;

    a reducer (24) supported by the carrier (22), the reducer (24) decelerating power input thereto and transmitting the power to the case (23) to rotate the case (23); and

    a flange (25) fixed to the base (21) or the carriage body (15) and separately provided from the carrier (22),

    characterized in that
    the flange (25) (25) supports a brake unit (18) that is for braking the power input to the reducer (24).
     
    2. The speed reducing device (11) for a carriage (10) according to claim 1, wherein
    the flange (25) is provided such that it does not hold the case (23).
     
    3. The speed reducing device (11) for a carriage (10) according to claim 1 or 2, wherein the flange (25) is provided separately from the case (23).
     
    4. The speed reducing device (11) for a carriage (10) according to any one of claims 1 to 3, further comprising:

    a first bearing (31) disposed between the carrier (22) and the case (23); and

    a seal portion (40) for sealing a space surrounded by the base (21) and the case (23), wherein

    the reducer (24), the carrier (22) and the first bearing (31) are disposed in the space sealed by the seal portion (40).


     
    5. The speed reducing device(11) for a carriage (10) according to claim 4, further comprising:

    an input shaft (27) for inputting power to the reducer (24), the input shaft (27) being provided so as to penetrate the space in a rotation axis direction in which a rotation axis (Ax) of the case (23) extends;

    a second bearing (32) disposed between the input shaft (27) and the case (23); and

    a third bearing (33) disposed between the input shaft (27) and the base (21), wherein

    the second bearing (32) and the third bearing (33) are disposed in the space sealed by the seal portion (40), and

    the seal portion (40) includes a first seal element (41) for sealing between the base (21) or the carrier (22) and the case (23), a second seal element (42) for sealing between the case (23) and the input shaft (27), and a third seal element (43) for sealing between the base (21) and the input shaft (27).


     
    6. The speed reducing device (11) for a carriage (10) according to claim 5, wherein
    the brake unit (18) is provided at a portion of the input shaft (27) that protrudes out from the space sealed by the seal portion (40) toward one side (S1), and a motor (19) is provided at a portion of the input shaft (27) that protrudes out from the space sealed by the seal portion (40) toward the other side (S2).
     
    7. The speed reducing device (11) for a carriage (10) according to any one of claims 1 to 6, wherein
    the flange (25) is detachably provided on the base (21) or the carriage body (15) on one side (S1) of the reducer (24) in a rotation axis direction in which a rotation axis (Ax) of the case (23) extends,
    the case (23) has an attachment portion (35) that projects in a direction perpendicular to the rotation axis (Ax),
    a part of the wheel (16) located on the one side (S1) in the rotation axis direction compared to the attachment portion (35) is attached on the attachment portion (35), and
    only the attachment portion (35) of the case (23) overlaps the wheel (16) with respect to the rotation axis direction.
     
    8. The speed reducing device (11) for a carriage (10) according to claim 1, wherein
    the speed reducing device(11) is supported by the carriage body (15),wherein
    the brake unit (18) and the wheel (16) are detachable from the case (23) by moving the brake unit (18) and the wheel (16) toward one side (S1) along the rotation axis (Ax) of the case (23) while the speed reducing device (11) is retained on the case (23).
     


    Ansprüche

    1. Untersetzungsvorrichtung (11) für einen Wagen (10), umfassend:

    einen Untersatz (21), der an einem Wagen-Körper (15) befestigt ist;

    einen Träger (22), der an dem Untersatz (21) befestigt ist;

    ein Gehäuse (23), an dem ein Rad (16) abnehmbar angebracht ist;

    ein Untersetzungsgetriebe (24), das von dem Träger (22) getragen wird, wobei das Untersetzungsgetriebe (24) die ihm zugeführte Kraft verlangsamt und die Kraft auf das Gehäuse (23) überträgt, um das Gehäuse (23) zu drehen; sowie

    einen Flansch (25), der an dem Untersatz (21) oder dem Wagen-Körper (15) befestigt und separat von dem Träger (22) vorhanden ist,

    dadurch gekennzeichnet, dass

    der Flansch (25) eine Brems-Einheit (18) trägt, die zum Abbremsen der dem Untersetzungsgetriebe (24) zugeführten Kraft dient.


     
    2. Untersetzungsvorrichtung (11) für einen Wagen (10) nach Anspruch 1, wobei der Flansch (25) so eingerichtet ist, dass er das Gehäuse (23) nicht hält.
     
    3. Untersetzungsvorrichtung (11) für einen Wagen (10) nach Anspruch 1 oder 2, wobei der Flansch (25) separat von dem Gehäuse (23) vorhanden ist.
     
    4. Untersetzungsvorrichtung (11) für einen Wagen (10) nach einem der Ansprüche 1 bis 3, die des Weiteren umfasst:

    ein erstes Lager (31), das zwischen dem Träger (22) und dem Gehäuse (23) angeordnet ist; sowie

    einen Dichtungsabschnitt (40) zum Abdichten eines von dem Untersatz (21) und dem Gehäuse (23) umgebenen Raums, wobei

    das Untersetzungsgetriebe (24), der Träger (22) und das erste Lager (31) in dem durch den Dichtungsabschnitt (40) abgedichteten Raum angeordnet sind.


     
    5. Untersetzungsvorrichtung (11) für einen Wagen (10) nach Anspruch 4, die des Weiteren umfasst:

    eine Eingangswelle (27) zum Zuführen von Kraft zu dem Untersetzungsgetriebe (24), wobei die Eingangswelle (27) so eingerichtet ist, dass sie in einer Drehachsen-Richtung, in der sich eine Drehachse (Ax) des Gehäuses (23) erstreckt, in den Raum eindringt;

    ein zweites Lager (32), das zwischen der Eingangswelle (27) und dem Gehäuse (23) angeordnet ist; sowie

    ein drittes Lager (33), das zwischen der Eingangswelle (27) und Dem Untersatz (21) angeordnet ist, wobei das zweite Lager (32) und das dritte Lager (33) in dem durch den Dichtungsabschnitt (40) abgedichteten Raum angeordnet sind, und

    der Dichtungsabschnitt (40) ein erstes Dichtungselement (41) zum Abdichten zwischen dem Untersatz (21) oder dem Träger (22) und dem Gehäuse (23), ein zweites Dichtungselement (42) zum Abdichten zwischen dem Gehäuse (23) und der Eingangswelle (27) sowie ein drittes Dichtungselement (43) zum Abdichten zwischen dem Untersatz (21) und der Eingangswelle (27) einschließt.


     
    6. Untersetzungsvorrichtung (11) für einen Wagen (10) nach Anspruch 5, wobei
    die Brems-Einheit (18) an einem Abschnitt der Eingangswelle (27) vorhanden ist, der aus dem durch den Dichtungsabschnitt (40) abgedichteten Raum zu einer Seite (S1) hin nach außen vorsteht, und ein Motor (19) an einem Abschnitt der Eingangswelle (27) vorhanden ist, der aus dem durch den Dichtungsabschnitt (40) abgedichteten Raum zu der anderen Seite (S2) hin vorsteht.
     
    7. Untersetzungsvorrichtung (11) für einen Wagen (10) nach einem der Ansprüche 1 bis 6, wobei
    der Flansch (25) an dem Untersatz (21) oder dem Wagen-Körper (15) an einer Seite (S1) des Untersetzungsgetriebes (24) in einer Drehachsen-Richtung abnehmbar vorhanden ist, in der sich eine Drehachse (Ax) des Gehäuses (23) erstreckt,
    das Gehäuse (23) einen Anbringungs-Abschnitt (35) aufweist, der in einer Richtung senkrecht zu der Drehachse (Ax) vorsteht,
    ein Teil des Rades (16), der sich im Verhältnis zu dem Anbringungs-Abschnitt (35) an der einen Seite (S1) in der Drehachsen-Richtung befindet, an dem Anbringungs-Abschnitt (35) angebracht ist, und
    nur der Anbringungs-Abschnitt (35) des Gehäuses (23) das Rad (16) in Bezug auf die Drehachsen-Richtung überlappt.
     
    8. Untersetzungsvorrichtung (11) für einen Wagen (10) nach Anspruch 1, wobei die Untersetzungsvorrichtung (11) von dem Wagen-Körper (15) getragen wird, und
    die Brems-Einheit (18) sowie das Rad (16) von dem Gehäuse (23) abgenommen werden können, indem die Brems-Einheit (18) und das Rad (16) entlang der Drehachse (Ax) des Gehäuses (23) zu einer Seite (S1) hin bewegt werden und dabei die Untersetzungsvorrichtung (11) an dem Gehäuse (23) gehalten wird.
     


    Revendications

    1. Dispositif de réduction de vitesse (11) pour chariot (10), comprenant:

    une base (21) fixée sur une caisse de chariot (15);

    un support (22) fixé à la base (21);

    un boîtier (23) auquel une roue (16) est fixée de manière amovible;

    un réducteur (24) supporté par le support (22), le réducteur (24) décélérant la puissance qui lui est appliquée et transmettant la puissance au boîtier (23) pour faire tourner le boîtier (23); et

    une bride (25) fixée à la base (21) ou à la caisse du chariot (15) et prévue séparément du support (22), caractérisée en ce que

    la bride (25) supporte une unité de freinage (18) qui sert à freiner la puissance absorbée par le réducteur (24).


     
    2. Dispositif de réduction de vitesse (11) pour chariot (10) selon la revendication 1, dans lequel la bride (25) est prévue de telle sorte qu'elle ne retient pas le boîtier (23).
     
    3. Dispositif de réduction de vitesse (11) pour chariot (10) selon les revendications 1 ou 2, dans lequel la bride (25) est prévue séparément du boîtier (23).
     
    4. Dispositif de réduction de vitesse (11) pour chariot (10) selon l'une quelconque des revendications 1 à 3, comprenant en outre:

    un premier palier (31) disposé entre le support (22) et la caisse (23); et

    une partie scellement (40) pour sceller un espace entouré par la base (21) et le boîtier (23), dans lequel

    le réducteur (24), le support (22) et le premier palier (31) sont disposés dans l'espace rendu étanche par la partie scellée (40).


     
    5. Dispositif de réduction de vitesse (11) pour chariot (10) selon la revendication 4, comprenant en outre:

    un arbre d'entrée (27) pour l'entrée de la puissance au réducteur (24), l'arbre d'entrée (27) étant prévu de manière à pénétrer dans l'espace dans une direction d'axe de rotation dans laquelle s'étend un axe de rotation (Ax) du boîtier (23);

    un deuxième palier (32) disposé entre l'arbre d'entrée (27) et le boîtier (23); et

    un troisième palier (33) disposé entre l'arbre d'entrée (27) et la base (21), dans lequel

    le deuxième palier (32) et le troisième palier (33) sont disposés dans l'espace rendu étanche par la partie scellée (40), et

    la partie scellement (40) comprend un premier élément de joint (41) pour l'étanchéité entre la base (21) ou le support (22) et le boîtier (23), un deuxième élément de joint (42) pour l'étanchéité entre le boîtier (23) et l'arbre d'entrée (27), et un troisième élément de joint (43) pour l'étanchéité entre la base (21) et l'arbre d'entrée (27).


     
    6. Dispositif de réduction de vitesse (11) pour chariot (10) selon la revendication 5, dans lequel l'unité de freinage (18) est prévue sur une partie de l'arbre d'entrée (27) qui fait saillie de l'espace rendu étanche par la partie scellement (40) vers un côté (S1), et un moteur (19) est prévu sur une partie de l'arbre d'entrée (27) qui fait saillie de l'espace rendu étanche par la partie scellement (40) vers l'autre côté (S2).
     
    7. Dispositif de réduction de vitesse (11) pour un chariot (10) selon l'une quelconque des revendications 1 à 6 dans lequel
    la bride (25) est prévue de manière amovible sur la base (21) ou la caisse (15) d'un côté (S1) du réducteur (24) dans une direction d'axe de rotation dans laquelle s'étend un axe de rotation (Ax) de la caisse (23),
    le cas (23) a une partie fixation (35) qui dépasse dans une direction perpendiculaire à l'axe de rotation (Ax),
    une partie de la roue (16) située d'un côté (S1) dans la direction de l'axe de rotation par rapport à la partie fixation (35) est fixée sur la partie fixation (35), et
    seule la partie fixation (35) du boîtier (23) chevauche la roue (16) par rapport à la direction de l'axe de rotation.
     
    8. Dispositif de réduction de vitesse (11) pour chariot (10) selon la revendication 1, dans lequel le dispositif de réduction de vitesse (11) est supporté par la caisse du chariot (15), dans lequel
    l'unité de freinage (18) et la roue (16) sont détachables du boîtier (23) en déplaçant l'unité de freinage (18) et la roue (16) vers un côté (S1) le long de l'axe de rotation (Ax) du boîtier (23) tandis que le dispositif de réduction de la vitesse (11) est retenu sur le boîtier (23).
     




    Drawing






    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