(19)
(11)EP 2 826 691 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 12871524.0

(22)Date of filing:  13.03.2012
(51)International Patent Classification (IPC): 
B61G 7/08(2006.01)
B61G 11/18(2006.01)
B61G 9/20(2006.01)
(86)International application number:
PCT/CN2012/072228
(87)International publication number:
WO 2013/134917 (19.09.2013 Gazette  2013/38)

(54)

TELESCOPIC HITCH BUFFER DEVICE HAVING A TELESCOPIC MECHANISM FOR USE IN HIGH SPEED ELECTRIC MULTIPLE UNITS

TELESKOPISCHE KUPPLUNGSPUFFERVORRICHTUNG MIT EINEM TELESKOPMECHANISMUS ZUR VERWENDUNG IN EINEM TRIEBWAGEN FÜR HOCHGESCHWINDIGKEIT

DISPOSITIF TAMPON D'ATTELAGE TÉLESCOPIQUE AVEC UN MÉCANISME TÉLESCOPIQUE DESTINÉ À ÊTRE UTILISÉ DANS DES UNITÉS ÉLECTRIQUES MULTIPLES À GRANDE VITESSE


(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

(43)Date of publication of application:
21.01.2015 Bulletin 2015/04

(73)Proprietor: CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd.
Qingdao (CN)

(72)Inventors:
  • LV, Xiaozhong
    Qingdao, Shandong 266031 (CN)
  • LIU, Hui
    Qingdao, Shandong 266031 (CN)
  • CHEN, Kai
    Qingdao, Shandong 266031 (CN)

(74)Representative: J A Kemp LLP 
14 South Square Gray's Inn
London WC1R 5JJ
London WC1R 5JJ (GB)


(56)References cited: : 
CN-A- 1 771 157
DE-A1- 10 162 515
JP-B1- S4 815 482
US-A- 4 773 667
US-A- 5 687 860
CN-Y- 2 547 553
GB-A- 191 103 631
US-A- 3 922 007
US-A- 5 188 385
  
      
    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


    [0001] The invention relates to a railway vehicle telescopic hitch buffer device for use in high speed electric multiple unit, EMU, trains, the device comprising a telescopic mechanism, and is installed at the head or tail of an EMU.

    [0002] As one of basic components of a railway vehicle, the coupling buffer has the advantages of rapidly connecting and disconnecting railway vehicles, transmitting vehicle tractive force, and improving vehicle safety and comfortability.

    [0003] The telescopic hitch buffer device is positioned inside an air guide sleeve of the first carriage of a high-speed EMU to reduce air resistance during running when it does not work, and stretches out of the air guide sleeve for connecting trains if necessary. At present, all telescopic hitch buffer devices used in high-speed EMUs are foreign products, higher in price and longer in delivery period, in particular to supply of spare parts; it is necessary to develop and manufacture telescopic hitch buffer devices in order to solve the current situation that telescopic hitch buffer devices depend on importing from foreign countries and to fill in domestic blanks. Key technologies in manufacturing telescopic hitch buffer devices are extension driving, extension in place and locking, and unlocking functions.

    [0004] Currently two kinds of telescopic hitch buffer devices in use are as below: one is a manual-operated telescopic hitch buffer device used in an EMU comprising 16 carriages, and the other is a pneumatic-driven automatic telescopic hitch buffer device used in an EMU comprising 8 carriages, both are foreign products. The extension driving of the foreign manual-operated telescopic hitch buffer device adopts an external gear and rack transmission, the unlocking mechanism is also an external one, the buffer system is relatively weak in absorbing impact energy, the overall structure takes up large space, and the extension driving structure is complex.

    [0005] JP S4815482 B1 discloses a telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains, wherein the telescopic mechanism comprises a compression rod located inside a movable housing of said hitch buffer device, one end said compression rod being connected to the movable housing, and a bearing connector encasing the compression rod, and one end of the compression rod is connected to the movable housing via a torsion spring, keeping the compression rod and the bearing connector in a locked state.

    [0006] An aim of the invention is to provide a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains, which is installed at the head or tail of an EMU, positioned inside the streamline air guide sleeve, and used for connection of EMUs or rescue. The hitch buffer device is retracted and locked if no train requires for reconnection; the air guide sleeve is firstly opened and then the telescopic mechanism is operated to stretch the coupling out if the train requires for reconnection; coupling up is available once the coupling stretches in place and is locked; after disconnection of the train, the telescopic mechanism is operated to retract the coupling, then the coupling is locked, and finally the air guide sleeve is closed. In the above-mentioned process, stretching, locking, retraction and locking functions of the coupling are completed by the telescopic mechanism of the hitch buffer device. In the running process of trains reconnected, the telescopic mechanism bears larger tension load and compression load.

    [0007] According to the present invention there is provided a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains, as defined in the independent claim.

    [0008] Optionally, the extension/retraction driving mechanism comprises a telescopic tooth gear positioned on the movable housing, and a telescopic gear rack fixed to the guiding barrel.

    [0009] Optionally, the unlocking driving mechanism comprises a steel wire rope fixed to the compression rod and driving the compression rod to rotate.

    [0010] Optionally, the protrusions and grooves are distributed equidistantly.

    [0011] Optionally, the protrusions are of the same shape.

    [0012] Optionally, the grooves are of the same shape.

    [0013] Optionally, the bearing connector is provided with two limit stops at the grooves.

    [0014] The beneficial effects of the invention are as below: since relevant components of the invention are arranged inside the movable housing, volume is reduced, good protection is provided for respective components, and the telescopic mechanism and the locking mechanism are relatively simple in structure, labor-saving, reliable in operation, and can bear relatively large longitudinal loads, besides, the capacity of a buffer system for absorbing impact energy is relatively larger. Upon application of the invention, the telescopic hitch buffer device is available for realization of localization and perfect substitution of imported products.

    Fig. 1 is a section view of the invention.

    Fig.2 is an outside view of the invention.

    Fig.3 is a structure diagram of the compression rod in the invention.

    Fig.4 is a side view of Fig.3.

    Fig.5 is a structure diagram of the bearing connector in the invention.

    Fig.6 is a side view of Fig.5.



    [0015] Description of embodiments of the invention is made in combination with the accompanying drawings.

    [0016] Disclosed is a telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains. The telescopic mechanism comprises a compression rod 2 located inside a movable housing 1 of said hitch buffer device, one end of said compression rod 2 being connected to the movable housing 1, and a bearing connector 3 encasing the compression rod 2; a guiding barrel 4 is fixedly mounted outside the bearing connector 3; an extension/retraction driving mechanism 9 is provided between the guiding barrel 4 and the movable housing 1, and the extension/retraction driving mechanism comprises a telescopic tooth gear 10 positioned on the movable housing 1 and a telescopic gear rack 11 fixed to the guiding barrel 4; one end of the compression rod 2 is connected to the movable housing 1 via a torsion spring 5, keeping the compression rod 2 and the bearing connector 3 in a locked state; a locking mechanism comprises protrusions 6 distributed at the other end of the compression rod 2, and grooves 7 in engagement with protrusions 6 on the inner wall of the bearing connector 3; the protrusions 6 and grooves 7 are distributed equidistantly, and the protrusions 6 and the grooves 7 are of the same shape. It is in an unlocked state when the protrusions 6 face the grooves 7, both of which can slide relative to each other; an unlocking driving mechanism 8 is provided on the outside of the movable housing 1; the unlocking driving mechanism comprising a steel wire rope fixed to the compression rod 2 and driving the compression rod 2 to rotate. The bearing connector 3 is provided with two limit stops 12 at the grooves 7.

    [0017] The working process of the invention is as below:

    From the retraction state to the stretching state:



    [0018] The unlocking driving mechanism 8 actuates and drives the compression rod 2 to rotate counterclockwise at a preset angle until the limit stops 12 are unlocked, at this moment, both the compression rod 2 and the bearing connector 3 are in an unlocked state→the extension/retraction driving mechanism 9 starts and drives the compression rod 2 to move ahead until the whole set of extension/retraction driving mechanism stretches out, in this process the action of the unlocking driving mechanism 8 is released→the torsion spring 5 actuates and drives the compression rod 2 to rotate clockwise to the limit stops 12 until the extension/retraction driving mechanism 9 stretches out and is automatically locked, and then the action of the extension/retraction driving mechanism 9 is released, at this moment, both the compression rod 2 and the bearing connector 3 enter into a locked state→ the process of stretching is completed.

    From the stretching state to the retraction state:



    [0019] The unlocking driving mechanism 8 actuates and drives the compression rod 2 to rotate counterclockwise at a preset angle until the limit stops 12 are unlocked, at this moment, both the compression rod 2 and the bearing connector 3 are in an unlocked state→the extension/retraction driving mechanism 9 starts and drives the compression rod 2 to move back until the whole set of extension/retraction driving mechanism retracts, in this process the action of the unlocking driving mechanism 8 is released→the torsion spring 5 actuates and drives the compression rod 2 to rotate clockwise to the limit stops 12 until the extension/retraction driving mechanism 9 retracts and is automatically locked, and then the action of the extension/retraction driving mechanism 9 is released, at this moment, both the compression rod 2 and the bearing connector 3 enter into a locked state→ the process of retraction is completed.


    Claims

    1. A telescopic hitch buffer device for use in high speed electric multiple unit, EMU, trains, the device comprising a telescopic mechanism, wherein the telescopic mechanism comprises a compression rod (2) located inside a movable housing (1) of said hitch buffer device, one end of said compression rod (2) being connected to the movable housing (1), and a bearing connector (3) encasing the compression rod (2); wherein one end of the compression rod (2) is connected to the movable housing (1) via a torsion spring (5), keeping the compression rod (2) and the bearing connector (3) in a locked state;
    characterised in that:
    a guiding barrel (4) is fixedly mounted outside the bearing connector (3); an extension/retraction driving mechanism (9) is provided between the guiding barrel (4) and the movable housing (1); a locking mechanism comprises protrusions (6) distributed at the other end of the compression rod (2), and grooves (7) in engagement with protrusions (6) on the inner wall of the bearing connector (3); the locking mechanism is in an unlocked state when the protrusions (6) face the grooves (7), both the compression rod (2) and the bearing connector (3) can slide relative to each other; an unlocking driving mechanism (8) is provided on the outside of the movable housing (1).
     
    2. The telescopic hitch buffer device for use in high speed EMU trains according to claim 1, wherein the telescopic mechanism comprises a telescopic tooth gear (10) positioned on the movable housing (1), and a telescopic gear rack (11) fixed to the guiding barrel (4).
     
    3. The telescopic hitch buffer device for use in high speed EMU trains according to claim 1, wherein the unlocking driving mechanism comprises a steel wire rope fixed to the compression rod (2) and driving the compression rod (2) to rotate.
     
    4. The telescopic mechanism in a telescopic hitch buffer device for use in high speed EMU trains according to claim 1, wherein the protrusions (6) and grooves (7) are distributed equidistantly.
     
    5. The telescopic hitch buffer device for use in high speed EMU trains according to claim 1, wherein the protrusions (6) are of the same shape.
     
    6. The telescopic hitch buffer device for use in high speed EMU trains according to claim 1, wherein the grooves (7) are of the same shape.
     
    7. The telescopic hitch buffer device for use in high speed EMU trains according to any one of claims 1-6, wherein the bearing connector (3) is provided with two limit stops (12) at the grooves.
     
    8. The telescopic hitch buffer device for use in a high speed EMU trains according to claim 2, wherein:

    the unlocking driving mechanism comprises a steel wire rope fixed to the compression rod (2) and driving the compression rod (2) to rotate;

    the protrusions (6) and grooves (7) are distributed equidistantly;

    the protrusions (6) are of the same shape;

    the grooves (7) are of the same shape; and

    the bearing connector (3) is provided with two limit stops (12) at the grooves.


     


    Ansprüche

    1. Teleskopische Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-Elektrotriebzügen (Electric Multiple Unit, EMU), wobei die Vorrichtung einen Teleskopmechanismus umfasst, wobei der Teleskopmechanismus eine Druckstange (2) umfasst, die sich in einem beweglichen Gehäuse (1) der Kupplungspuffervorrichtung befindet, wobei ein Ende der Druckstange (2) mit dem beweglichen Gehäuse (1) verbunden ist und eine Lagerverbindung (3) die Druckstange (2) umschließt; wobei ein Ende der Druckstange (2) mit dem beweglichen Gehäuse (1) über eine Torsionsfeder (5) verbunden ist, wodurch die Druckstange (2) und die Lagerverbindung (3) in einem Verriegelungszustand gehalten werden;
    dadurch gekennzeichnet, dass:
    ein Führungszylinder (4) außerhalb der Lagerverbindung (3) fest angebracht ist; ein Ausfahr/Einfahr-Antriebsmechanismus (9) zwischen dem Führungszylinder (4) und dem beweglichen Gehäuse (1) bereitgestellt ist; ein Verriegelungsmechanismus Vorsprünge (6), die an dem anderen Ende der Druckstange (2) verteilt sind, und Nuten (7) im Eingriff mit Vorsprüngen (6) an der Innenwand der Lagerverbindung (3) umfasst; der Verriegelungsmechanismus in einem entriegelten Zustand ist, wenn die Vorsprünge (6) den Nuten (7) zugewandt sind, sowohl die Druckstange (2) als auch die Lagerverbindung (3) sich relativ zueinander verschieben können; ein Entriegelungsantriebsmechanismus (8) an der Außenseite des beweglichen Gehäuses (1) bereitgestellt ist.
     
    2. Teleskopische Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-EMU-Zügen nach Anspruch 1, wobei der Teleskopmechanismus ein Teleskopzahnrad (10), das an dem beweglichen Gehäuse (1) positioniert ist, und eine Teleskopzahnstange (11) umfasst, die an dem Führungszylinder (4) befestigt ist.
     
    3. Teleskopische Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-EMU-Zügen nach Anspruch 1, wobei der Entriegelungsantriebsmechanismus ein Stahldrahtseil umfasst, das an der Druckstange (2) befestigt ist und die Druckstange (2) antreibt, sodass sie sich dreht.
     
    4. Teleskopmechanismus in einer teleskopischen Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-EMU-Zügen nach Anspruch 1, wobei die Vorsprünge (6) und Nuten (7) gleich weit entfernt verteilt sind.
     
    5. Teleskopische Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-EMU-Zügen nach Anspruch 1, wobei die Vorsprünge (6) die gleiche Form haben.
     
    6. Teleskopische Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-EMU-Zügen nach Anspruch 1, wobei die Nuten (7) die gleiche Form haben.
     
    7. Teleskopische Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-EMU-Zügen nach einem der Ansprüche 1-6, wobei die Lagerverbindung (3) mit zwei Anschlägen (12) an den Nuten bereitgestellt ist.
     
    8. Teleskopische Kupplungspuffervorrichtung zur Verwendung bei Hochgeschwindigkeits-EMU-Zügen nach Anspruch 2, wobei:

    der Entriegelungsantriebsmechanismus ein Stahldrahtseil umfasst, das an der Druckstange (2) befestigt ist und die Druckstange (2) antreibt, sodass sie sich dreht;

    die Vorsprünge (6) und Nuten (7) gleich weit entfernt verteilt sind;

    die Vorsprünge (6) die gleiche Form haben;

    die Nuten (7) die gleiche Form haben; und

    die Lagerverbindung (3) mit zwei Anschlägen (12) an den Nuten bereitgestellt ist.


     


    Revendications

    1. Dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains à unités multiples électriques à haute vitesse (Electric Multiple Unit, EMU), le dispositif comprenant un mécanisme télescopique, dans lequel le mécanisme télescopique comprend une tige de compression (2) située à l'intérieur d'un boîtier mobile (1) dudit dispositif de tampon d'attelage, une extrémité de ladite tige de compression (2) étant connectée au boîtier mobile (1), et un connecteur de palier (3) enfermant la tige de compression (2) ; dans lequel une extrémité de la tige de compression (2) est connectée au boîtier mobile (1) via un ressort de torsion (5), maintenant la tige de compression (2) et le connecteur de palier (3) dans un état verrouillé ;
    caractérisé en ce que :
    un cylindre de guidage (4) est monté fixement à l'extérieur du connecteur de palier (3) ; un mécanisme d'entraînement d'extension / de rétraction (9) est prévu entre le cylindre de guidage (4) et le boîtier mobile (1) ; un mécanisme de verrouillage comprend des saillies (6) réparties à l'autre extrémité de la tige de compression (2) et des rainures (7) en contact avec des saillies (6) sur la paroi intérieure du connecteur de palier (3) ; le mécanisme de verrouillage est dans un état déverrouillé lorsque les saillies (6) font face aux rainures (7), à la fois la tige de compression (2) et le connecteur de palier (3) peuvent coulisser l'un par rapport à l'autre ; un mécanisme d'entraînement de déverrouillage (8) est prévu à l'extérieur du boîtier mobile (1).
     
    2. Dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains EMU à grande vitesse selon la revendication 1, dans lequel le mécanisme télescopique comprend un engrenage à dents télescopiques (10) positionné sur le boîtier mobile (1), et une crémaillère télescopique (11) fixée au cylindre de guidage (4).
     
    3. Dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains EMU à grande vitesse selon la revendication 1, dans lequel le mécanisme d'entraînement de déverrouillage comprend un câble métallique en acier fixé à la tige de compression (2) et entraînant la tige de compression (2) en rotation.
     
    4. Mécanisme télescopique dans un dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains EMU à grande vitesse selon la revendication 1, dans lequel les saillies (6) et les rainures (7) sont réparties de manière équidistante.
     
    5. Dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains EMU à grande vitesse selon la revendication 1, dans lequel les saillies (6) ont la même forme.
     
    6. Dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains EMU à grande vitesse selon la revendication 1, dans lequel les rainures (7) ont la même forme.
     
    7. Dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains EMU à grande vitesse selon l'une quelconque des revendications 1 à 6, dans lequel le connecteur de palier (3) est pourvu de deux butées de fin de course (12) au niveau des rainures.
     
    8. Dispositif de tampon d'attelage télescopique destiné à être utilisé dans des trains EMU à grande vitesse selon la revendication 2, dans lequel :

    le mécanisme d'entraînement de déverrouillage comprend un câble en acier fixé à la tige de compression (2) et entraînant la tige de compression (2) en rotation ;

    les saillies (6) et les rainures (7) sont réparties de manière équidistante ;

    les saillies (6) ont la même forme ;

    les rainures (7) ont la même forme ; et

    le connecteur de palier (3) est pourvu de deux butées de fin de course (12) au niveau des rainures.


     




    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