(19)
(11)EP 3 470 623 B1

(12)EUROPEAN PATENT SPECIFICATION

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

(21)Application number: 17815759.0

(22)Date of filing:  25.06.2017
(51)Int. Cl.: 
F01C 1/344  (2006.01)
F01C 21/08  (2006.01)
(86)International application number:
PCT/KR2017/006675
(87)International publication number:
WO 2017/222347 (28.12.2017 Gazette  2017/52)

(54)

VANE-TYPE COMPRESSED AIR MOTOR

DRUCKLUFTMOTOR IN SCHAUFELFORM

MOTEUR À AIR COMPRIMÉ DU TYPE À AUBES


(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: 24.06.2016 KR 20160078952

(43)Date of publication of application:
17.04.2019 Bulletin 2019/16

(73)Proprietors:
  • GONG, SHUIMING
    Badaling Town, Yanqing District, Beijing City, China 102102 (CN)
  • Kim, Jae-Ho
    Beijing City, China 102102 (KR)

(72)Inventor:
  • KIM, Jae-Ho
    Beijing City China 102102 (CN)

(74)Representative: Berkkam, Ayfer 
Berkkam Patent Consulting Büklüm Sokak, No. 5/16-3
06680 Kavaklidere Ankara
06680 Kavaklidere Ankara (TR)


(56)References cited: : 
WO-A1-02/101203
FR-A1- 2 458 675
JP-A- S5 359 902
JP-A- H03 185 289
JP-A- 2015 017 612
US-A1- 2009 223 480
FR-A- 641 155
GB-A- 508 199
JP-A- H01 224 490
JP-A- 2008 223 731
JP-A- 2015 222 077
US-B2- 9 200 631
  
      
    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 belongs to the field of vane-type compressed air motors, and in particularly relates to the innovative technology involving a vane-type compressed air motor which can not only reduce wear of vanes but also improve the power of the motor when the motor is used under high pressure.

    Background Art



    [0002] As shown in Figs. 1 and 2, a typical vane-type compressed air motor is a device that, after high-pressure air A is injected, uses an expansion force from the air A to obtain a rotational force. Referring to Fig. 1, such a vane-type compressed air motor 1 is composed of a casing 10 with an air inlet 11 for injecting air A and an air outlet 13 for discharging the injected air A, and a cylindrical rotor 20 which is supported inside the casing 10 and rotates, the rotor 20 supporting a central shaft 30 which passes through the rotor so as to ensure smooth rotation of the casing 10. Further, an outer peripheral surface 23 of the rotor 20 is provided with grooves 25 which are formed in a lengthwise direction of the central shaft 30 and arranged in a direction towards the cylinder, and plate-shaped fins 40 which are inserted into the grooves 25 to reciprocate along the grooves 25, with a cylindrical surface (a surface formed in the direction towards the cylinder) being formed on an inner surface 15, in contact with outer distal end portions 41 of the fins 40, of the casing 10.

    [0003] In addition, the center of the rotor 20 is of an eccentric structure with respect to the center of the inner surface 15. The air inlet 11 is formed in the casing 10 in a gradually enlarged manner in a state where the outer peripheral surface 23 of the rotor 20 is closest to the inner surface 15 of the casing 10, and the air outlet 13 is formed at a position where the outer peripheral surface 23 is furthest from the inner surface 15 or at a position closest to the supporting point. Operational embodiments of the vane-type compressed air motor 1 are described below.

    [0004] Firstly, when high-pressure air A is injected into the air inlet 11, the air A enters a space between the fins 40 on two sides and between the inner surface 15 of the casing 10 and the outer peripheral surface 23 of the rotor 20. Therefore, the rotor 20 starts to rotate as the sealed air A expands.

    [0005] In this way, in a state where the fins 40 protrude outwards under a centrifugal force, the fins gradually protrude more towards the inner surface 15. Therefore, the injected air A serves to make the volume become larger and larger. Reference is made to Fig. 2 for the principle of rotating the rotor 20 by means of the injected air A. In the inner side surfaces L, K of the two corresponding fins 40, the area of the inner side surface K in the rotation direction is larger than that of the other inner surface. This is a normal phenomenon caused by the eccentric structure of the rotor 20 in the casing 10. Therefore, the expansion force of the air will apply a side thrust F to the inner surface K in the rotation direction. Strictly, the side thrust F is a difference between side thrusts acting on the inner side surfaces L, K, and the expansion force of the air A acts on the inner surface 15 and the outer peripheral surface 23 at the same time, such that the inner surface 15 between the two fins 40 is of course wider than the outer peripheral surface 23 between the two fins 40. Therefore, the thrust P acts in a direction towards the casing 10. At this time, the thrust P pushes the inner surface 15, and cannot act as a rotational force for rotating the rotor 20 together with the side thrust F since the casing 10 is fixed instead of being rotatable.

    [0006] Therefore, the rotor 20 can only be rotated by the side thrust F. Of course, since the high-pressure air A is injected into spaces between most of the fins 40, the force for rotating the rotor 20 is a multiple of the side thrust F, and in this way, the expanded air A is impelled by the rotating fins 40 and is then discharged via the air outlet 13.

    [0007] Further, the fins 40 are inserted into the grooves 25 of the rotor 20 while moving towards the inner surface 15 of the casing 10 as the rotor 20 rotates.

    [0008] With such cycle, the air A continuously and repeatedly enters the spaces between the fins 40 such that the rotor 20 rotates continuously, and the rotational forces are finally used as power.

    [0009] However, in the above conventional technologies, since the fins rub due to the high-speed rotation thereof, the output is reduced, and the durability of the fins is reduced due to the wear.

    [0010] Following documents show a conventional motor:

    D1: GB 508 199 A (Henry Garvin Johnson; Cedric John Gerrard Lonsdale) published on 27 June 1939.

    D2: FR 641 155 A (Annen Robert) published on 30 July 1928.

    D3: FR 2 458 675 A1 (Etienne Charles) published on 2 January 1981.

    D4: WO 02/101203 A1 (Simonds Edward L) published on 19 December 2002.

    D5: JP H01 224490 A (Seiko Seiki KK) published on 7 September 1989.

    D6: JP H03 185289 A (Hitachi LTD) published on 13 August 1991.


    Summary of the Invention



    [0011] In order to solve the problems in the conventional technologies, an object of the present invention is to provide a vane-type compressed air motor which can reduce the wear caused by the rubbing of vanes even when used under high pressure, thereby prolonging its service life. Moreover, it is to provide a novel vane-type compressed air motor which can maximally prevent air leakage and thus increase the power.

    [0012] In order to achieve the objects of the present invention, the following technical solutions of the vane-type compressed air motor according to the present invention are provided.

    [0013] A vane-type compressed air motor, comprising a casing, a rotor, vanes, vane stoppers, an inner retainer ring, stop bearings and a kit. The casing is provided with an air inlet and an air outlet, a plurality of vanes are inserted into the rotor, and the rotor is disposed inside the casing to form a rotating body. The vane stoppers are respectively disposed on two sides of an inner end side of the vane to form a protruding limit stop. The inner retainer ring is connected to the upper central portion of the rotor, with an outer ring thereof pushing the limit stop of the vane outwards. The stop bearings are respectively disposed at upper and lower portions of the rotor to restrict the vane stopper from moving outwards. The kit is composed of an upper cover and a lower cover respectively disposed at two ends of the rotor, with inner side surfaces of the upper cover and the lower cover being provided with guide grooves, the vanes being movable within the guide grooves. An insertion groove is provided in the head of an outer end of the vane, and a vane roller is inserted into the insertion groove.

    [0014] A solution different in the stop bearings is further provided, that is, an inner groove is provided inside the casing, the stop bearings are hinged with the limit stop of the vane stopper and inserted into the inner groove, and the plurality of vanes in the rotor are circumferentially rotated along the inner groove.

    Effects of the Invention



    [0015] According to the present invention, the wear caused by rubbing of the vane can be minimized even under high pressure conditions, and therefore, not only the service life of the vane can be prolonged, but also the present invention can be used in various tools in which air is used, exhibiting a significant effect of saving the consumption and cost, thereby having a broad market prospect.

    [0016] In addition, according to the present invention, air leakage can also be prevented, and insertion grooves are formed in an outer peripheral surface of the rotor, thereby having the effect of improving the power of the motor.

    Brief Description of the Drawings



    [0017] 

    Fig. 1 is a cross-sectional view of a vane-type air motor according to the conventional technologies.

    Fig. 2 is an enlarged partial view of Fig. 1.

    Fig. 3 is a transparent oblique view of a vane-type compressed air motor according to an embodiment of the present invention.

    Fig. 4 is a perspective view of a vane-type compressed air motor according to an embodiment of the present invention.

    Fig. 5 is a perspective view of a vane-type compressed air motor according to an embodiment of the present invention when installed with a kit.

    Fig. 6 is a perspective view showing a relationship between a vane and a vane stopper of a vane-type compressed air motor according to the present invention.

    Fig. 7 is a perspective view showing an action relationship between a vane stopper and a stop bearing of a vane-type compressed air motor according to the present invention.

    Fig. 8 is a perspective view showing an assembled state of a vane-type compressed air motor according to an embodiment of the present invention.

    Fig. 9 is a perspective view of a vane-type compressed air motor according to another embodiment of the present invention.


    Reference numerals in Figs.3 to 9



    [0018] 

    100. vane-type compressed air motor

    106. casing

    102. air inlet

    104. air outlet

    110. rotor

    120. inner retainer ring

    130. vane roller

    135. guide groove

    140. vane stopper

    145. vane

    145a. insertion groove

    150. kit

    150a. upper cover

    150b. lower cover

    160. stop bearing

    170. inner groove


    Detailed Description of Embodiments



    [0019] An embodiment of a vane-type compressed air motor 100 according to the present invention will be described in detail below according to Figs. 3 to 9.

    [0020] Referring to Figs. 3 to 6, a vane-type compressed air motor (100) provided by an embodiment of the present invention, which is a device that, after high-pressure air is injected, use a thrust force of the air to obtain a rotational force, comprises a casing 106, a rotor 110 and vanes 145, the casing 106 being provided with an air inlet 102 and an air outlet 104, eight vanes 145 being inserted into the rotor 110, and the rotor being disposed inside the casing 106 to form a rotating body. The difference from the conventional technologies is: the present embodiment further comprises vane stoppers 140, an inner retainer ring 120, stop bearings 160 and a kit 150.

    [0021] The vane stoppers 140 are respectively disposed on two sides of an inner end side of the vane 145 to form a projecting limit stop, and the stop bearings 160 are respectively mounted on upper and lower portions of the rotor 110 to restrict movement of the vane, so as to achieve the purpose of restricting the vanes 145 from moving outwards. The vane stopper 140 may be formed in the shape of a bearing to minimize contact and wear with the stop bearings 160.

    [0022] The inner retainer ring 120 is connected to an upper central portion of the rotor 110 for pushing the limit stop of the vane 145 outwards, so as to prevent the vanes and the casing 106 from coming into contact as the motor rotates. The rotor 110 supports a central shaft which passes therethrough, so as to ensure smooth rotation in the casing 106.

    [0023] The stop bearings 160 are respectively disposed at upper and lower portions of the rotor 110 to restrict the vane stopper 140 from moving outwards, such that the vane stoppers 140 rotate only in a certain trajectory to prevent the vanes 145 from moving outwards and coming into contact with the inner wall of the casing 106.

    [0024] The kit 150 is composed of an upper cover 150a and a lower cover 150b respectively disposed at both ends of the rotor 110, and the kit 150 functions to prevent air leakage when the motor operates. The inner side surfaces of the upper cover 150a and the lower cover 150b are provided with guide grooves 135, and the vanes 145 are movable within the guide grooves 135.

    [0025] In the driving process of the compressed air motor 100, the vane 145 will tend to be drawn inwards due to the air pressure supplied by the high pressure when the vane 145 rotates at a high speed, and at this time, the high-pressure air may leak out through a gap between the end portion of the vane 145 and the inner wall of the casing 106, which will result in reducing the power. So in this embodiment, an insertion groove 145a is provided at the head of an outer end of the vanes 145, and the function of the groove 145a is to effectively prevent the vanes 145 from being drawn inwards due to the air pressure in the driving process of the compressed air motor 100.

    [0026] Vane rollers 130 may also be inserted into the insertion groove 145a to reduce the wear of vanes due to contact between the vanes 145 and the casing 106 as the motor rotates. The vane rollers 130 may be of various shapes, such as a cylindrical shape and a square column shape.

    [0027] As shown in Figs. 8 and 9, another embodiment of the present invention is provided, different in that an inner groove 170 is provided inside the casing 106, the stop bearings 160 are hinged with the limit stop of the vane stopper 140 and inserted into the inner groove 170, and the plurality of vanes in the rotor 110 are circumferentially rotated along the inner groove 170. In this embodiment, an outer side of the vane stopper 140 is directly connected to the stop bearings 160, and an inner groove 170 having the same shape as the stop bearings in the foregoing embodiment is formed at an inner side of the casing 106 so as to prevent the vanes 145 from moving outwards and coming into contact with the inner wall of the casing 106. The inner portion of the casing 106 may be oval in shape, and an air inlet 102 and an air outlet 104 may be mounted on two sides.

    [0028] According to the embodiment of present invention, when the inner ring 120 is inserted and the driving is initiated, the inner ring has the function to push the vane stopper 140 outwards so as to ensure the vane 145 to move outwards to achieve the purpose of an initial activation. That is, the inner ring 120 has an eccentric structure, and when the driving is initiated, a pressure is applied outwards on the vane stopper 140 so that the inwardly-drawn vane 145 protrudes outwards to achieve a successful driving of the vane-type compressed air motor 100 according to the present invention.

    [0029] In addition, another shaft may be mounted on the side of the air outlet 104, and the two shafts may be connected by gears or belts to form an internal gear.

    [0030] The outer peripheral surface of the rotor 110 may be formed in a lengthwise direction toward the central shaft in a way of protruding in the cylindrical direction. In addition, in order to increase the power of the motor, insertion grooves are preferably formed on the outer peripheral surface of the rotor 110.

    [0031] The present invention is not limited to the preferred embodiments with aforementioned features, and changes may be made to the present invention by those skilled in the art without departing from the scope of the appended claims. Therefore, various changes made to these embodiments will fall within the scope of protection of the present invention.

    Industrial applicability



    [0032] The present invention relates to the field of vane-type compressed air motors, and in particularly to the innovative technology involving a vane-type compressed air motor which can not only reduce wear of a vane and also improve the power of the motor when the motor is used under high pressure.


    Claims

    1. A vane-type compressed air motor (100), comprising a casing (106), a rotor (110) and vanes (145), the casing (106) being provided with an air inlet (102) and an air outlet (104), and a plurality of vanes (145) being inserted into the rotor (110) which is disposed inside the casing (106) to form a rotating body, wherein the vane-type compressed air motor (100) further comprises: vane stoppers (140), an inner retainer ring (120), stop bearings (160) and a kit (150),
    the vane stoppers (140) are respectively disposed on two sides of an inner end side of the vane (145) to form a protruding limit stop; the inner retainer ring (120) is connected to an upper central portion of the rotor (110) for pushing the limit stop of the vane (145) outwards; the stop bearings (160) are respectively disposed at upper and lower portions of the rotor (110) to restrict the vane stopper (140) from moving outwards; characterised in that the kit (150) is composed of an upper cover (150a) and a lower cover (150b) respectively disposed at two ends of the rotor (110), with inner side surfaces of the upper cover (150a) and the lower cover (150b) being provided with guide grooves (135), the vanes (145) being movable within the guide grooves (135).
     
    2. The vane-type compressed air motor (100) according to claim 1, characterized in that an insertion groove (145a) is provided in the head of an outer end of the vane (145), and a vane roller (130) is inserted into the insertion groove (145a).
     
    3. The vane-type compressed air motor (100) according to claim 1 or 2, characterized in that an inner groove (170) is provided inside the casing (106), the stop bearings (160) are hinged with the limit stop of the vane stopper (140) and inserted into the inner groove (170), and the plurality of vanes in the rotor (110) are circumferentially rotated along the inner groove.
     


    Ansprüche

    1. Druckluftmotor (100) vom Flügeltyp umfassend ein Gehäuse (106), einen Rotor (110) und Flügel (145), das Gehäuse (106) mit einem Lufteinlass (102) und einem Luftauslass (104) versehen ist, und eine Vielzahl von Flügeln (145) in den Rotor (110) eingesetzt ist, der innerhalb des Gehäuses (106) angeordnet ist, um einen rotierenden Körper zu bilden, wobei
    Druckluftmotor (100) vom Flügeltyp umfasst ferner: Flügelanschläge (140), einen inneren Haltering (120), Anschlaglager (160) und ein Kit (150),
    die Flügelanschläge (140) sind jeweils auf zwei Seiten einer inneren Endseite des Flügels (145) angeordnet, um einen vorstehenden Grenzanschlag zu bilden; der innere Haltering (120) ist mit einem oberen Mittelteil des Rotors (110) verbunden, um den Grenzanschlag des Flügels (145) nach außen zu drücken; die Anschlaglager (160) sind jeweils am oberen und unteren Teil des Rotors (110) angeordnet, um die Bewegung des Flügelanschlages (140) nach außen zu begrenzen; dadurch gekennzeichnet, dass der Kit (150) aus einer oberen Abdeckung (150a) und einer unteren Abdeckung (150b) besteht, die jeweils an zwei Enden des Rotors (110) angeordnet sind, mit inneren Seitenflächen der oberen Abdeckung (150a) und der unteren Abdeckung (150b), die mit Führungsnuten (135) versehen sind, die Flügel (145) innerhalb der Führungsnuten (135) beweglich sind.
     
    2. Druckluftmotor (100) vom Flügeltyp nach Anspruch 1, dadurch gekennzeichnet, dass eine Einführungsnut (145a) im Kopf eines äußeren Endes des Flügels (145) vorgesehen ist und eine Flügelrolle (130) in die Einführungsnut (145a) eingesetzt ist.
     
    3. Druckluftmotor (100) vom Flügeltyp nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine innere Nut (170) im Inneren des Gehäuses (106) vorgesehen ist, die Anschlaglager (160) mit dem Grenzanschlag des Flügelanschlages (140) angelenkt und in die innere Nut (170) eingesetzt sind, und die Vielzahl von Flügeln im Rotor (110) in Umfangsrichtung entlang der inneren Nut gedreht werden.
     


    Revendications

    1. Moteur à air comprimé de type à palettes (100), comprenant un boîtier (106), un rotor (110) et des palettes (145), le boîtier (106) étant pourvu d'une entrée d'air (102) et d'une sortie d'air (104), et une pluralité de palettes (145) étant insérées dans le rotor (110) qui est disposé à l'intérieur du boîtier (106) pour former un corps rotatif, dans lequel le moteur à air comprimé de type à palettes (100) comprend en outre : des butées de palette (140), une bague de retenue intérieure (120), des paliers d'arrêt (160) et un kit (150),
    les butées de palette (140) sont respectivement disposées sur deux côtés d'une face d'extrémité intérieure de la palette (145) pour former une butée saillante ; la bague de retenue intérieure (120) est reliée à une partie centrale supérieure du rotor (110) pour pousser la butée de palette (145) vers l'extérieur ; les paliers d'arrêt (160) sont respectivement disposés aux parties supérieure et inférieure du rotor (110) pour empêcher la butée de palette (140) de se déplacer vers l'extérieur ; caractérisé en ce que le kit (150) est composé d'un couvercle supérieur (150a) et d'un couvercle inférieur (150b) disposés respectivement aux deux extrémités du rotor (110), avec les surfaces latérales intérieures du couvercle supérieur (150a) et du couvercle inférieur (150b) étant pourvues de rainures de guidage (135), les palettes (145) étant mobiles dans les rainures de guidage (135).
     
    2. Moteur à air comprimé de type à palettes (100) selon la revendication 1, caractérisé en ce qu'une rainure d'insertion (145a) est prévue dans la tête d'une extrémité extérieure de la palette (145), et un rouleau de palette (130) est inséré dans la rainure d'insertion (145a).
     
    3. Moteur à air comprimé de type à palettes (100) selon la revendication 1 ou 2, caractérisé en ce qu'une rainure intérieure (170) est prévue à l'intérieur du boîtier (106), les paliers d'arrêt (160) sont articulés avec la butée de palette (140) et inséré dans la rainure intérieure (170), et la pluralité de palettes dans le rotor (110) sont tournées circonférentiellement le long de la rainure intérieure.
     




    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