EP1493644A1 - Reibungskeil zum Dämpfen mit elastischen Elementen - Google Patents

Reibungskeil zum Dämpfen mit elastischen Elementen Download PDF

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Publication number
EP1493644A1
EP1493644A1 EP04253105A EP04253105A EP1493644A1 EP 1493644 A1 EP1493644 A1 EP 1493644A1 EP 04253105 A EP04253105 A EP 04253105A EP 04253105 A EP04253105 A EP 04253105A EP 1493644 A1 EP1493644 A1 EP 1493644A1
Authority
EP
European Patent Office
Prior art keywords
component
vehicle
friction wedge
resiliently deformable
arrangement according
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.)
Granted
Application number
EP04253105A
Other languages
English (en)
French (fr)
Other versions
EP1493644B1 (de
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
Powell Duffryn Rail 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 Powell Duffryn Rail Ltd filed Critical Powell Duffryn Rail Ltd
Priority to PL04253105T priority Critical patent/PL1493644T3/pl
Publication of EP1493644A1 publication Critical patent/EP1493644A1/de
Application granted granted Critical
Publication of EP1493644B1 publication Critical patent/EP1493644B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B61F5/308—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating damping devices
    • 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
    • B61F5/32—Guides, e.g. plates, for axle-boxes
    • B61F5/34—Wedge mechanisms for adjusting clearance between underframes and axles

Definitions

  • the invention relates to a friction wedge for use on a railway vehicle.
  • a number of vehicle designs include a pair of spaced apart side frames and a bolster that extends transversely between the side frames.
  • Each side frame includes a pair of pedestals, each of which is supported, through suspension springs, upon an associated saddle.
  • Friction wedges are used to dampen movement of each pedestal with respect to the associated saddle.
  • Friction wedges are often generally triangular-shaped such that the friction wedge can act as a wedge between an inclined surface of the pedestal and a generally vertical wear plate on a column of the saddle.
  • the friction wedge is wedged into engagement between the pedestal and the column of the saddle by a suspension spring. Resistance to sliding movement of the friction wedge with respect to the pedestal and the saddle, which in turn provides dampening of movement, is provided by the frictional forces generated between the friction wedge and the pedestal and saddle.
  • a friction damping arrangement for a railway vehicle comprising first and second relatively moveable vehicle components, a friction wedge having a surface arranged to co-operate with a surface of the second vehicle component, and resiliently urged towards the first vehicle component, and a resiliently deformable component located between the first vehicle component and the friction wedge, the resiliently deformable component being deformable to allow relative movement between the first vehicle component and the friction wedge.
  • the railway vehicle is of the type comprising a pedestal supported by a saddle through suspension springs
  • the pedestal may form the first vehicle component and the saddle may form the second vehicle component.
  • the resiliently deformable component may be secured to the first vehicle component.
  • the resiliently deformable component may be arranged such that all relative movement of the friction wedge requires deformation of the resiliently deformable component, or alternatively a limited amount of movement of the friction wedge may be permitted before such deformation occurs.
  • the provision of the resiliently deformable component ensures that, regardless as to weather or atmospheric conditions, the resistance to relative movement between the friction wedge and the first vehicle component falls within a predetermined acceptable range, and thus acceptable predictable damping of movement between the first and second vehicle components takes place.
  • the truck 12 includes two side frames 14 (only part of one of which is shown) which are spaced apart and generally parallel to one another.
  • Each side frame 14 includes a pair of pedestals 15, each pedestal 15 including a pair of inclined surfaces 24 defining therebetween a cavity into which part of a saddle 16 extends.
  • Suspension springs 22 are carried by the saddle 16 and support the pedestal 15.
  • Each saddle 16 co-operates with a wheelset of the vehicle, for example through appropriate rocker assemblies.
  • a friction wedge 18 is associated with each inclined surface 24, the friction wedge 18 being urged towards the associated surface 24 by at least some of the suspension springs 22.
  • the motion wedge 18 includes a body 30. As best shown in Figure 2, the body 30 is generally triangular or wedge-shaped.
  • the body 30 includes a base 34 having a generally horizontal bottom wall 36.
  • the bottom wall 36 is adapted to engage the top end of one of the suspension springs 22.
  • the body 30 also includes a generally vertical front wall 37 including a front face 38, upon which a wear pad 39 is mounted.
  • the body 30 also includes an inclined wall 40 that extends at an inclined angle of approximately 30° between the wall 36 of the base 34 and the front wall 37.
  • the inclined wall 40 includes a generally planar surface 42.
  • the body 30 includes a hollow chamber 44 and an aperture 46 in each side wall 47 of the body 30 that is in communication with the chamber 44.
  • the component 48 comprises a metallic, for example steel, mounting plate 50 to which is bonded a layer 52 of a resiliently deformable, rubber-like material.
  • a reinforcing layer 54 is bonded to the layer 52, and a further layer 56 of resiliently deformable material is bonded to the reinforcing layer 54.
  • the layer 56 is further bonded to a second mounting plate 58 to which is secured a block 60.
  • the block 60 projects through an opening 62 formed in the inclined wall 40 of the friction wedge 18.
  • the friction wedge 18 is installed in a truck 12 as shown in Figure 1 such that a suspension spring 22 engages the wall 36 of the base 34, and such that the component 48 is located between the inclined surface 24 of the pedestal 15 and the surface 42 of the inclined wall 40 of the body 30.
  • the spring 22 and the inclined surface 24 of the pedestal 15 thereby force the wear pad 39 into abutting engagement with a wear plate 17 mounted upon the saddle 16.
  • the wear pad 39 of the friction wedge 18 slides generally upwardly and downwardly in engagement with the wear plate 17 conjointly with and in response to upward and/or downward movement of the pedestal 15 relative to the saddle 16.
  • the frictional force generated between the wear pad 39 and the wear plate 17 dampens the movement of the pedestal 15 relative to the saddle 16.
  • the saddle 16 In use, in order to allow the movement of the axle which occurs, for example, when the vehicle passes around a curve, the saddle 16 is permitted to move longitudinally relative to the pedestal 15. Such movement requires the friction wedges 18 associated with the saddle 16 to move laterally, such movement requiring deformation of the associated components 48 and hence is damped in a reliable, predictable manner.
  • the resilient layers 52, 56 will apply a predictable biassing force to the friction wedge 18 against which such movement occurs.
  • the component 48 is not provided and the friction wedge bears directly against the pedestal, there is a risk of ice crystals forming on the pedestal which may reduce the friction between the components, or in other contaminants achieving a similar effect, which may impair the damping operation of the friction wedge.
  • the component 48 is preferably designed to be of high stiffness in the vertical direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Vibration Prevention Devices (AREA)
  • Dowels (AREA)
  • Clamps And Clips (AREA)
  • Braking Arrangements (AREA)
EP04253105A 2003-05-29 2004-05-26 Reibungskeil zum Dämpfen mit elastischen Elementen Expired - Lifetime EP1493644B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04253105T PL1493644T3 (pl) 2003-05-29 2004-05-26 Sprężysty tłumiący klin cierny

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0312276.9A GB0312276D0 (en) 2003-05-29 2003-05-29 Resilient damping friction wedge
GB0312276 2003-05-29

Publications (2)

Publication Number Publication Date
EP1493644A1 true EP1493644A1 (de) 2005-01-05
EP1493644B1 EP1493644B1 (de) 2007-01-31

Family

ID=9958922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04253105A Expired - Lifetime EP1493644B1 (de) 2003-05-29 2004-05-26 Reibungskeil zum Dämpfen mit elastischen Elementen

Country Status (5)

Country Link
EP (1) EP1493644B1 (de)
AT (1) ATE353072T1 (de)
DE (1) DE602004004567T2 (de)
GB (2) GB0312276D0 (de)
PL (1) PL1493644T3 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207848A (en) * 1934-07-18 1940-07-16 Symington Gould Corp Railway truck
US3517620A (en) * 1966-11-16 1970-06-30 Midland Ross Corp Railway car truck with friction dampened axles
US3835789A (en) * 1971-07-28 1974-09-17 Gloucester Railway Carriage Snubbed railway bogies
US4953471A (en) * 1989-08-04 1990-09-04 Amsted Industries Incorporated Friction shoe assembly for repair of worn railway truck

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1240914A (en) * 1969-10-30 1971-07-28 Midland Ross Corp Railway car truck
SU1030227A1 (ru) * 1980-12-29 1983-07-23 Предприятие П/Я В-2207 Центральное пружинное подвешивание тележки грузового вагона
US4915031A (en) * 1981-06-29 1990-04-10 Hansen, Inc. Railway truck damping assembly
SE446708B (sv) * 1984-11-22 1986-10-06 Asea Ab Dempningsanordning vid boggi for relsgaende fordon

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207848A (en) * 1934-07-18 1940-07-16 Symington Gould Corp Railway truck
US3517620A (en) * 1966-11-16 1970-06-30 Midland Ross Corp Railway car truck with friction dampened axles
US3835789A (en) * 1971-07-28 1974-09-17 Gloucester Railway Carriage Snubbed railway bogies
US4953471A (en) * 1989-08-04 1990-09-04 Amsted Industries Incorporated Friction shoe assembly for repair of worn railway truck

Also Published As

Publication number Publication date
DE602004004567T2 (de) 2007-11-15
GB2402198B (en) 2005-10-19
EP1493644B1 (de) 2007-01-31
ATE353072T1 (de) 2007-02-15
GB0312276D0 (en) 2003-07-02
GB0411722D0 (en) 2004-06-30
DE602004004567D1 (de) 2007-03-22
PL1493644T3 (pl) 2007-07-31
GB2402198A (en) 2004-12-01

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