EP1481870B1 - Rocker arrangement - Google Patents

Rocker arrangement Download PDF

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Publication number
EP1481870B1
EP1481870B1 EP04253146A EP04253146A EP1481870B1 EP 1481870 B1 EP1481870 B1 EP 1481870B1 EP 04253146 A EP04253146 A EP 04253146A EP 04253146 A EP04253146 A EP 04253146A EP 1481870 B1 EP1481870 B1 EP 1481870B1
Authority
EP
European Patent Office
Prior art keywords
rocker
arrangement according
saddle
adaptor
adaptor member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04253146A
Other languages
German (de)
French (fr)
Other versions
EP1481870A1 (en
Inventor
Paul c/o Powell Duffryn Rail Limited Hewitt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
English Welsh & Scottish Railway Holdings Limi
Original Assignee
English Welsh & Scottish Railway Holdings Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by English Welsh & Scottish Railway Holdings Ltd filed Critical English Welsh & Scottish Railway Holdings Ltd
Publication of EP1481870A1 publication Critical patent/EP1481870A1/en
Application granted granted Critical
Publication of EP1481870B1 publication Critical patent/EP1481870B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
    • B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
    • B61F5/305—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating rubber springs

Definitions

  • This invention relates to a rocker arrangement suitable for use in a railway vehicle.
  • One design of railway vehicle includes a pair of side frames each of which defines a pair of pedestals.
  • a saddle is associated with each pedestal, the pedestal being supported by the associated saddle through a number of suspension springs. Relative vertical and horizontal movement between the saddle and the associated pedestal is damped by means of friction wedges which are urged against angled surfaces of the pedestal by some of the suspension springs and bear against generally vertically extending surfaces of the saddle.
  • Each saddle is carried by an axle and wheel set through a rocker arrangement which typically comprises a component having a part-spherical surface mounted within the saddle, and an adaptor member arranged to co-operate with the axle or bearing of the wheelset and having a dished surface into which the said component extends and against which the part-spherical surface bears to allow the saddle and its associated springs to articulate relative to the adaptor member and wheelset. It is thought that it may be desirable to damp the operation of the rocker arrangement.
  • a rocker arrangement for use in a railway vehicle.
  • the arrangement comprise an adaptor member, a rocker member and at least one resiliently deformable component.
  • the adaptor member is arranged to cooperate with an axle or bearing of a wheel set of the railway vehicle.
  • the rocker member and the adaptor member have co-operating surfaces which bear against each other to allow the rocker member to tilt relative to the adaptor member.
  • the at least one resiliently deformable component is located on the adaptor member at a position laterally spaced to one side of the co-operating surfaces and is arranged to act on the adaptor member to apply a restoring force in the event of tilting of the rocker member relative to the adaptor member.
  • the resiliently deformable component conveniently includes first and second deformable elements located on opposing sides of the co-operating surfaces.
  • the deformable elements may be interconnected, for example by being mounted upon a common support plate.
  • the elements are conveniently blocks of rubber or rubber-like material.
  • the rocker member is conveniently shaped to define a part-spherical projection arranged to extend into a dished part of the adaptor member.
  • the railway vehicle illustrated in Figure 1 comprises a pair of side frames 10, part of only one of which is illustrated, each side frame 10 being shaped to include a pair of pedestals 12.
  • Each pedestal includes a pair of inclined surfaces 14 defining therebetween a cavity into which part of a saddle 16 extends.
  • Suspension springs 18 are provided between the saddle 16 and the pedestal 12 to support the pedestal 12 the suspension springs 18 allowing some vertical and horizontal movement of the pedestal 12 relative to the saddle 16.
  • a pair of friction wedges 20 are provided, each wedge 20 being urged by some of the suspension springs 18 into engagement with the angled surfaces 14 of the pedestal 12, the arrangement being such that the friction wedges 20 are urged into engagement with substantially vertical surfaces 22 of the saddle 16, the friction wedges 20 serving to damp vertical and horizontal movement between the pedestal 12 and the saddle 16.
  • the saddle 16 is carried by an axle 24 of a wheelset of the vehicle through a rocker arrangement 26.
  • the rocker arrangement 26 comprises an adaptor member 28 arranged to co-operate with the axle 24 in the usual manner.
  • the upper surface of the adaptor member 28 is shaped to define a dished region 30.
  • a rocker member 32 is bolted or otherwise rigidly secured to the saddle 16, the rocker member 32 including, on its underside, a projection 34 having a part-spherical surface 36 located, at least in part, within the dished region 30 of the adaptor member 28.
  • the rocker arrangement 26 thus allows a degree of articulation between the saddle 16 and the axle 24.
  • resiliently deformable components 38 in the form of blocks of a rubber or rubber-like material are located on opposite sides of the rocker member 32, the resiliently deformable components being located between the saddle 16 and the adaptor member 28 and arranged such that in the event of relative tilting occurring between the saddle 16 and the adaptor member 28, as permitted by the rocker arrangement 26, at least part of at least one or the other of the components 38 will be compressed, such compression serving to damp the relative tilting motion and further serving to apply a restoring force urging the saddle 16 and adaptor member 28 towards their original positions.
  • the components 38 are mounted upon respective support plates 40 which are interconnected by a cross-member 42 so as to adopt an H configuration.
  • retainer members 44 are secured to the saddle 16 in order to securely retain the components 38 in position, in use.
  • rocker member 32 may be modified to include flanges with which the components 38 engage rather than the components 38 co-operating directly against the saddle 16. It may further be possible to modify the shape of the components 38, or possible to include, for example, a greater number of components 38 in the rocker arrangement 26.

Abstract

The arrangement has an adaptor unit (28) defining a dished region and a rocker unit (32) that is rigidly secured to a saddle of a railway vehicle. The rocker unit allows a degree of articulation between the saddle and an axle (24). Rubber blocks (38) are located between saddle and adaptor unit for being compressed in an event of tilting between the saddle and the adaptor unit, as permitted by the rocker unit.

Description

  • This invention relates to a rocker arrangement suitable for use in a railway vehicle.
  • One design of railway vehicle includes a pair of side frames each of which defines a pair of pedestals. A saddle is associated with each pedestal, the pedestal being supported by the associated saddle through a number of suspension springs. Relative vertical and horizontal movement between the saddle and the associated pedestal is damped by means of friction wedges which are urged against angled surfaces of the pedestal by some of the suspension springs and bear against generally vertically extending surfaces of the saddle.
  • Each saddle is carried by an axle and wheel set through a rocker arrangement which typically comprises a component having a part-spherical surface mounted within the saddle, and an adaptor member arranged to co-operate with the axle or bearing of the wheelset and having a dished surface into which the said component extends and against which the part-spherical surface bears to allow the saddle and its associated springs to articulate relative to the adaptor member and wheelset. It is thought that it may be desirable to damp the operation of the rocker arrangement.
  • US 6142081 and GB 823090 disclose examples of alternate rocker arrangements in which a resilient component is located between the rocker member and adaptor member. Such arrangements can however be improved.
  • According to the present invention there is provided a rocker arrangement for use in a railway vehicle. The arrangement comprise an adaptor member, a rocker member and at least one resiliently deformable component. The adaptor member is arranged to cooperate with an axle or bearing of a wheel set of the railway vehicle. The rocker member and the adaptor member have co-operating surfaces which bear against each other to allow the rocker member to tilt relative to the adaptor member. The at least one resiliently deformable component is located on the adaptor member at a position laterally spaced to one side of the co-operating surfaces and is arranged to act on the adaptor member to apply a restoring force in the event of tilting of the rocker member relative to the adaptor member.
  • By this means lateral accelerations of the wheel set of the railway vehicle are better reacted by the tilting operation of the rocker and saddle.
  • The resiliently deformable component conveniently includes first and second deformable elements located on opposing sides of the co-operating surfaces. The deformable elements may be interconnected, for example by being mounted upon a common support plate. The elements are conveniently blocks of rubber or rubber-like material.
  • The rocker member is conveniently shaped to define a part-spherical projection arranged to extend into a dished part of the adaptor member.
  • The invention will further be described, by way of example, with reference to the accompanying drawings, in which:
    • Figure 1 is a view illustrating part of a railway vehicle incorporating a rocker arrangement in accordance with an embodiment of the invention; and
    • Figures 2 and 3 are sectional and side views illustrating the rocker arrangement of the vehicle of Figure 1.
  • The railway vehicle illustrated in Figure 1 comprises a pair of side frames 10, part of only one of which is illustrated, each side frame 10 being shaped to include a pair of pedestals 12. Each pedestal includes a pair of inclined surfaces 14 defining therebetween a cavity into which part of a saddle 16 extends. Suspension springs 18 are provided between the saddle 16 and the pedestal 12 to support the pedestal 12 the suspension springs 18 allowing some vertical and horizontal movement of the pedestal 12 relative to the saddle 16.
  • A pair of friction wedges 20 are provided, each wedge 20 being urged by some of the suspension springs 18 into engagement with the angled surfaces 14 of the pedestal 12, the arrangement being such that the friction wedges 20 are urged into engagement with substantially vertical surfaces 22 of the saddle 16, the friction wedges 20 serving to damp vertical and horizontal movement between the pedestal 12 and the saddle 16.
  • The saddle 16 is carried by an axle 24 of a wheelset of the vehicle through a rocker arrangement 26.
  • As shown most clearly in Figures 2 and 3, the rocker arrangement 26 comprises an adaptor member 28 arranged to co-operate with the axle 24 in the usual manner. The upper surface of the adaptor member 28 is shaped to define a dished region 30. A rocker member 32 is bolted or otherwise rigidly secured to the saddle 16, the rocker member 32 including, on its underside, a projection 34 having a part-spherical surface 36 located, at least in part, within the dished region 30 of the adaptor member 28. The rocker arrangement 26 thus allows a degree of articulation between the saddle 16 and the axle 24.
  • In accordance with the invention, resiliently deformable components 38 in the form of blocks of a rubber or rubber-like material are located on opposite sides of the rocker member 32, the resiliently deformable components being located between the saddle 16 and the adaptor member 28 and arranged such that in the event of relative tilting occurring between the saddle 16 and the adaptor member 28, as permitted by the rocker arrangement 26, at least part of at least one or the other of the components 38 will be compressed, such compression serving to damp the relative tilting motion and further serving to apply a restoring force urging the saddle 16 and adaptor member 28 towards their original positions. In the arrangement illustrated in the accompanying drawings, the components 38 are mounted upon respective support plates 40 which are interconnected by a cross-member 42 so as to adopt an H configuration. However, it will be appreciated that other configurations may be used, if desired. Further, retainer members 44 are secured to the saddle 16 in order to securely retain the components 38 in position, in use.
  • Although one specific embodiment of the invention has been described herein, it will be appreciated that the invention may be modified in numerous ways without departing from the scope of the invention. For example, the rocker member 32 may be modified to include flanges with which the components 38 engage rather than the components 38 co-operating directly against the saddle 16. It may further be possible to modify the shape of the components 38, or possible to include, for example, a greater number of components 38 in the rocker arrangement 26.

Claims (10)

  1. A rocker arrangement (26) for use in a railway vehicle, the arrangement (26) comprising:-
    an adaptor member (28) arranged to cooperate with an axle or bearing of a wheel set of the railway vehicle,
    a rocker member (32), the rocker member (32) and the adaptor member (28) having co-operating surfaces (36,30) which bear against each other to allow the rocker member (32) to tilt relative to the adaptor member (28), and
    at least one resiliently deformable component (38) located on the adaptor member (28) at a position laterally spaced to one side of the co-operating surfaces (36,30) and arranged to act on the adaptor member (28) to apply a restoring force in the event of tilting of the rocker member (32) relative to the adaptor member (28).
  2. An arrangement according to Claim 1, wherein the resiliently deformable component (38) includes first and second deformable elements (38) located on opposing sides of the co-operating surfaces (36,30).
  3. An arrangement according to Claim 2, wherein the deformable elements (3 8) are connected.
  4. An arrangement according to Claim 3, wherein the deformable elements (3 8) are mounted on a common support plate (40).
  5. An arrangement according to any of Claims 2 to 4, wherein the deformable elements (38) are blocks of rubber or rubber-like material.
  6. An arrangement according to any of the preceding claims, wherein the rocker member (32) is shaped to define a projection(34) having a part-spherical co-operating surface (36) arranged to extend into a dished part (30) of the adaptor member (28) having a dish shaped co-operating surface.
  7. An arrangement according to any of Claims 2 to 6, further comprising retainer members (44) to retain the deformable elements (38) in position.
  8. An arrangement according to any of the preceding claims, wherein the rocker member (32) is arranged to be secured to a saddle (16) of the railway vehicle.
  9. An arrangement according to claim 8 wherein the at least one resiliently deformable component (38) is located between the adaptor member (28) and saddle (16).
  10. An arrangement according to any one of claims 1 to 8, wherein the at least one resiliently deformable component (38) is located between the adaptor member (28) and the rocker member (32).
EP04253146A 2003-05-30 2004-05-27 Rocker arrangement Not-in-force EP1481870B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0312390.8A GB0312390D0 (en) 2003-05-30 2003-05-30 Rocker arrangement
GB0312390 2003-05-30

Publications (2)

Publication Number Publication Date
EP1481870A1 EP1481870A1 (en) 2004-12-01
EP1481870B1 true EP1481870B1 (en) 2007-12-12

Family

ID=9959010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04253146A Not-in-force EP1481870B1 (en) 2003-05-30 2004-05-27 Rocker arrangement

Country Status (5)

Country Link
EP (1) EP1481870B1 (en)
AT (1) ATE380731T1 (en)
DE (1) DE602004010570T2 (en)
ES (1) ES2295782T3 (en)
GB (2) GB0312390D0 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB823090A (en) * 1956-10-02 1959-11-04 Vickers Electrical Co Ltd Improvements in and relating to railway bogies
US3286653A (en) * 1963-09-03 1966-11-22 Midland Ross Corp Tracking truck
GB2035238B (en) * 1978-11-14 1983-03-23 British Steel Corp Railway wagon suspension units
US5463964A (en) * 1994-05-12 1995-11-07 National Castings Incorporated Rocker seat connection
US6142081A (en) * 1998-05-07 2000-11-07 Naco, Inc. Pedestal rocker seat for providing passive axle steering to a rigid railway truck

Also Published As

Publication number Publication date
GB2402117A (en) 2004-12-01
DE602004010570D1 (en) 2008-01-24
EP1481870A1 (en) 2004-12-01
ES2295782T3 (en) 2008-04-16
GB0411853D0 (en) 2004-06-30
GB2402117B (en) 2006-07-19
GB0312390D0 (en) 2003-07-02
DE602004010570T2 (en) 2008-04-17
ATE380731T1 (en) 2007-12-15

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