EP0584182B1 - Apparatus for controlling lateral movement of vehicle bodies - Google Patents

Apparatus for controlling lateral movement of vehicle bodies Download PDF

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Publication number
EP0584182B1
EP0584182B1 EP92910538A EP92910538A EP0584182B1 EP 0584182 B1 EP0584182 B1 EP 0584182B1 EP 92910538 A EP92910538 A EP 92910538A EP 92910538 A EP92910538 A EP 92910538A EP 0584182 B1 EP0584182 B1 EP 0584182B1
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EP
European Patent Office
Prior art keywords
abutment
bodies
fluid
movement
piston
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.)
Expired - Lifetime
Application number
EP92910538A
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German (de)
French (fr)
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EP0584182A1 (en
Inventor
David Henry Brel Limited Allen
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.)
Bombardier Transportation UK Ltd
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ABB Transportation Ltd
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Publication date
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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
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/22—Guiding of the vehicle underframes with respect to the bogies
    • B61F5/24—Means for damping or minimising the canting, skewing, pitching, or plunging movements of the underframes
    • B61F5/245—Means for damping or minimising the canting, skewing, pitching, or plunging movements of the underframes by active damping, i.e. with means to vary the damping characteristics in accordance with track or vehicle induced reactions, especially in high speed mode

Definitions

  • This invention relates to apparatus for use in controlling relative displacement of interconnected bodies, and is particularly concerned with the control of the lateral suspension of a vehicle body on its chassis.
  • bump stops have been provided on the bogie for engagement by a body part when the body moves laterally to a respective side of the bogie.
  • Such bump stops are generally formed of a resilient flexible material such as rubber on a metal mounting. Initial lateral movement of the body is accommodated by secondary suspension members but once the body engages against a bump stop, the dynamic stiffness of the rubber increases progressively with increased movement of the body until eventually there is little flexibility. Normally the body moves laterally through a nominal air gap before engaging the rubber, and subsequently the metal, of the bump stop.
  • the increasing dynamic stiffness of the rubber of the bump stop increasingly transmits vibrations from the bogie to the body, to the discomfort of passengers, while it is the shock of the engagement with the metal which is most uncomfortably felt by passengers in the vehicle body.
  • apparatus for use in controlling relative displacement of interconnected bodies, the apparatus comprising actuator means providing a movable abutment externally thereof, means for mounting the actuator means on one of the bodies whereby the abutment is movable between an in-use first position in engagement with a part of the other of the bodies, and an out-of-use second position removed from the body part, means for accumulating fluid and moving fluid to and from the actuator means, and means for monitoring relative displacement of the bodies and controlling the movement of fluid to and from the accumulator means and the actuator means, to thereby selectively move the abutment to said first position engaging the body part, and also provide for continuous adjustment of the resistance to relative displacement of the bodies when the latter are operatively connected by the engagement of the abutment.
  • the actuator means is a piston and cylinder arrangement, a piston rod of which mounts the abutment on an outer end thereof.
  • the abutment may provide a low friction surface and may be formed of a resiliently flexible material such as rubber.
  • the accumulator means comprises a first accumulator providing hydraulic fluid to one side of the piston, and a second accumulator providing hydraulic fluid to the other side of the piston.
  • the monitoring means may be a control valve, the characteristics of which may be designed to limit movement of fluid within certain parameters when further relative displacement occurs after the abutment engages with the body part.
  • the present invention also provides a vehicle having interconnected bodies, one of which comprises at least one frame assembly with wheels, and the other of which is mounted on the frame assembly, and apparatus according to any of the four preceding paragraphs for use in controlling lateral movement of said other body relative to the frame assembly.
  • the present invention further provides a method of controlling relative displacement of interconnected bodies, the method comprising monitoring relative movement of the bodies and moving fluid to and from fluid accumulator means and actuator means, the latter providing a movable abutment externally thereof, selectively moving the abutment by way of the fluid relative to one of the bodies, towards and away from a part of the other of the bodies to be engageable therewith, and adjusting the quasi-static resistance to movement of the abutment when engaged by the body part.
  • a railway vehicle has a passenger carrying body 10 mounted in a bogie which has a frame 12 and wheelsets 14.
  • a bump stop arrangement is provided towards each end of the vehicle, each arrangement providing an abutment 18 on an outer end of a piston rod 20 of an hydraulic piston and cylinder assembly, where the piston 22 is movable within a cylinder 24.
  • the abutment is in the form of a low shear stiffness component, formed for example of rubber, each arrangement having a pair of the abutments 18 each operatively associated with a respective upwardly extending part 26 on the bogie frame 12, and each being located on a downwardly extending part of the vehicle body 10.
  • each of the cylinders 24, to the side of the piston 22 remote from the piston rod 20, is in communication with a respective hydraulic fluid accumulator 28, while the other interior space of each of the cylinders 24 is in communication with an accumulator 30.
  • the cylinder 24 and the accumulators 28, 30 are suitably positioned on the vehicle body 10.
  • Control of the movement of the hydraulic fluid supply to and from the circuit defined by the cylinder 24 and the accumulators 28 is effected by way of a valve controller 32 which is mounted on the vehicle body 10 and is designed to monitor lateral movement of the latter.
  • the controller 32 is operatively connected with the accumulators 28 in any suitable way.
  • the accumulator 30 provides the piston 22 with an hydraulic reaction spring force.
  • the use of the hydraulic accumulator 28 does provide the necessary flexibility to allow subsequent high frequency lateral movement between the bogie 12 and the body 10, but without significantly increasing the dynamic stiffness of the bump stop arrangement, because feedback to the controller 32 can enable the latter to control movement of hydraulic fluid to and away from the accumulator 28 and the cylinder 24.
  • the characteristics of the valve of controller 32 are such as to effect the movement of fluid in the circuit only within certain parameters, in order to regulate the movement and the applied force of the abutment 18 and the transmission of vibrations from the bogie to the vehicle body.
  • the bump stop arrangement of each pair is effective when the vehicle body initiates lateral movement in that direction, and that control of the bump stop arrangements is only effected when curving during the journey of the vehicle.
  • the prevention of the bump stops from becoming dynamically stiff minimises the transmission of vibrations to the body, and the minimising of movement of the body before engagement with the metal of a respective bump stop also mitigates the unwelcome impacts between the body and the bogie, resulting in a much smoother ride for the passengers.
  • the bump stop arrangements may be provided on the bogie frame for engagement with respective parts on the body.
  • control of movement of the hydraulic fluid in the circuit may be effected by other than a mechanically controlled valve, for example by way of a microcomputer and acceleration measurement, or other predictive methods.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Handcart (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A railway vehicle has a passenger carrying body (10) mounted on a bogie comprising a frame (12) and wheelsets (14). To accommodate lateral movement of the body (10) relative to the bogie frame (12), subsequent to the movement accommodated by conventional shear rubber mounts (16), a bump stop arrangement is provided towards each end of the vehicle. Each arrangement is mounted on a body part and has a pair of piston and cylinder assemblies providing rubber abutments (18) towards respective sides of the body part for engagement with the bogie frame (12). The spaces in each cylinder (24) on respective sides of the piston (22) communicate with respective fluid accumulators (28, 30), a valve controller (32) monitoring lateral movement of the vehicle body (10), and controlling movement of fluid supply between the cylinders and the accumulators. Movement of a respective abutment (18) into contact with the bogie frame (12) only when necessary, and subsequent continuous adjustment of the resistance provided by the abutment (18), prevents significant increase in the dynamic stiffness of the bump stop arrangement and mitigates unwelcome impact between the body (10) and the bogie frame (12), resulting in a relatively smoother ride for passengers.

Description

  • This invention relates to apparatus for use in controlling relative displacement of interconnected bodies, and is particularly concerned with the control of the lateral suspension of a vehicle body on its chassis.
  • When a railway vehicle moves around a track curve, the centrifugal force causes the vehicle body to move laterally on the vehicle bogie. Heretofore, fixed bump stops have been provided on the bogie for engagement by a body part when the body moves laterally to a respective side of the bogie. Such bump stops are generally formed of a resilient flexible material such as rubber on a metal mounting. Initial lateral movement of the body is accommodated by secondary suspension members but once the body engages against a bump stop, the dynamic stiffness of the rubber increases progressively with increased movement of the body until eventually there is little flexibility. Normally the body moves laterally through a nominal air gap before engaging the rubber, and subsequently the metal, of the bump stop. The increasing dynamic stiffness of the rubber of the bump stop increasingly transmits vibrations from the bogie to the body, to the discomfort of passengers, while it is the shock of the engagement with the metal which is most uncomfortably felt by passengers in the vehicle body.
  • According to the present invention there is provided apparatus for use in controlling relative displacement of interconnected bodies, the apparatus comprising actuator means providing a movable abutment externally thereof, means for mounting the actuator means on one of the bodies whereby the abutment is movable between an in-use first position in engagement with a part of the other of the bodies, and an out-of-use second position removed from the body part, means for accumulating fluid and moving fluid to and from the actuator means, and means for monitoring relative displacement of the bodies and controlling the movement of fluid to and from the accumulator means and the actuator means, to thereby selectively move the abutment to said first position engaging the body part, and also provide for continuous adjustment of the resistance to relative displacement of the bodies when the latter are operatively connected by the engagement of the abutment.
  • Preferably the actuator means is a piston and cylinder arrangement, a piston rod of which mounts the abutment on an outer end thereof. The abutment may provide a low friction surface and may be formed of a resiliently flexible material such as rubber.
  • Preferably also the accumulator means comprises a first accumulator providing hydraulic fluid to one side of the piston, and a second accumulator providing hydraulic fluid to the other side of the piston.
  • The monitoring means may be a control valve, the characteristics of which may be designed to limit movement of fluid within certain parameters when further relative displacement occurs after the abutment engages with the body part.
  • The present invention also provides a vehicle having interconnected bodies, one of which comprises at least one frame assembly with wheels, and the other of which is mounted on the frame assembly, and apparatus according to any of the four preceding paragraphs for use in controlling lateral movement of said other body relative to the frame assembly.
  • The present invention further provides a method of controlling relative displacement of interconnected bodies, the method comprising monitoring relative movement of the bodies and moving fluid to and from fluid accumulator means and actuator means, the latter providing a movable abutment externally thereof, selectively moving the abutment by way of the fluid relative to one of the bodies, towards and away from a part of the other of the bodies to be engageable therewith, and adjusting the quasi-static resistance to movement of the abutment when engaged by the body part.
  • An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:-
    • Fig. 1 is a schematic view of part of the vehicle with the lateral suspension apparatus between a vehicle body and bogie; and
    • Fig. 2 is a diagrammatic illustration of the lateral suspension apparatus of Fig. 1.
  • Referring to the drawings, a railway vehicle has a passenger carrying body 10 mounted in a bogie which has a frame 12 and wheelsets 14. Initial lateral movement of the body 10 relative to the bogie frame 12, for example due to the effect of centrifugal forces when the vehicle moves around a track curve, is accommodated by a suspension arrangement of shear rubber mounts 16.
  • To accommodate subsequent lateral movement of the body 10 relative to the bogie frame 12, a bump stop arrangement is provided towards each end of the vehicle, each arrangement providing an abutment 18 on an outer end of a piston rod 20 of an hydraulic piston and cylinder assembly, where the piston 22 is movable within a cylinder 24. The abutment is in the form of a low shear stiffness component, formed for example of rubber, each arrangement having a pair of the abutments 18 each operatively associated with a respective upwardly extending part 26 on the bogie frame 12, and each being located on a downwardly extending part of the vehicle body 10.
  • The interior space of each of the cylinders 24, to the side of the piston 22 remote from the piston rod 20, is in communication with a respective hydraulic fluid accumulator 28, while the other interior space of each of the cylinders 24 is in communication with an accumulator 30. The cylinder 24 and the accumulators 28, 30 are suitably positioned on the vehicle body 10.
  • Control of the movement of the hydraulic fluid supply to and from the circuit defined by the cylinder 24 and the accumulators 28 is effected by way of a valve controller 32 which is mounted on the vehicle body 10 and is designed to monitor lateral movement of the latter. The controller 32 is operatively connected with the accumulators 28 in any suitable way. The accumulator 30 provides the piston 22 with an hydraulic reaction spring force.
  • In use, when the controller 32 monitors the commencement of lateral movement of the vehicle body 10 under centrifugal forces, effective when the vehicle moves on to a curve in the track, movement of additional hydraulic fluid into a respective one of the accumulators 28 and the cylinder 24 to the side of the piston 22 remote from the piston rod 20 is effective to move the latter further out of the cylinder 24, and thus the respective abutment 18 towards the respective bogie part 26. The abutment 18 moves smoothly into contact with the bogie part 26. The abutment 18 is continuously forced towards the bogie part 26 to reduce the lateral movement thereof as far as possible. The use of the hydraulic accumulator 28 does provide the necessary flexibility to allow subsequent high frequency lateral movement between the bogie 12 and the body 10, but without significantly increasing the dynamic stiffness of the bump stop arrangement, because feedback to the controller 32 can enable the latter to control movement of hydraulic fluid to and away from the accumulator 28 and the cylinder 24. The characteristics of the valve of controller 32 are such as to effect the movement of fluid in the circuit only within certain parameters, in order to regulate the movement and the applied force of the abutment 18 and the transmission of vibrations from the bogie to the vehicle body.
  • It will be appreciated that the bump stop arrangement of each pair is effective when the vehicle body initiates lateral movement in that direction, and that control of the bump stop arrangements is only effected when curving during the journey of the vehicle. The prevention of the bump stops from becoming dynamically stiff minimises the transmission of vibrations to the body, and the minimising of movement of the body before engagement with the metal of a respective bump stop also mitigates the unwelcome impacts between the body and the bogie, resulting in a much smoother ride for the passengers.
  • Modifications may be made as follows: For example, the bump stop arrangements may be provided on the bogie frame for engagement with respective parts on the body. Also, control of movement of the hydraulic fluid in the circuit may be effected by other than a mechanically controlled valve, for example by way of a microcomputer and acceleration measurement, or other predictive methods.

Claims (8)

  1. Apparatus for use in controlling relative displacement of interconnected bodies, characterised in that the apparatus comprises actuator means providing a movable abutment (18) externally thereof, means for mounting the actuator means on one of the bodies (10) whereby the abutment is movable between an in-use first position in engagement with a part of the other of the bodies (12), and an out-of-use second position removed from the body part (12), means (28, 30) for accumulating fluid and moving fluid to and from the actuator means, and means (32) for monitoring relative displacement of the bodies (10, 12) and controlling the movement of fluid to and from the accumulator (28,30) means and the actuator means, to thereby selectively move the abutment (18) said first position engaging the body part, and also provide for continuous adjustment of the resistance to relative displacement of the bodies (10, 12) when the latter are operatively connected by the engagement of the abutment (18).
  2. Apparatus according to Claim 1, characterised in that the actuator means is a piston and cylinder arrangement (22, 24), a piston rod of which mounts the abutment on an outer end thereof.
  3. Apparatus according to Claim 1 or 2, characterised in that the abutment (18) provides a low friction surface.
  4. Apparatus according to Claim 3, characterised in that the abutment (18) is formed of rubber.
  5. Apparatus according to any of the preceding Claims, characterised in that the accumulator means (28, 30) comprises a first accumulator (28) providing hydraulic fluid to one side of the piston, and a second accumulator (30) providing hydraulic fluid to the other side of the piston.
  6. Apparatus according to any of the preceding Claims, characterised in that the monitoring means (32) is a control valve, the characteristics of which are designed to limit displacement of fluid within certain parameters when further relative movement occurs after the abutment (18) engages with the body part (12).
  7. A vehicle having interconnected bodies (10, 12), one of which comprises at least one frame assembly with wheels, and the other of which is mounted on the frame assembly, and characterised by apparatus according to any of the preceding Claims for use in controlling lateral movement of said other body relative to the frame assembly.
  8. A method of controlling relative movement of interconnected bodies (10, 12), the method being characterised by monitoring relative displacement of the bodies and moving fluid to and from fluid accumulator means (28, 30) and actuator means, the latter providing a movable abutment (18) externally thereof, selectively moving the abutment by way of the fluid relative to one of the bodies (10), towards and away from a part of the other of the bodies (12) to be engageable therewith, and adjusting the quasi-static resistance to movement of the abutment (18) when engaged by the body part.
EP92910538A 1991-05-21 1992-05-21 Apparatus for controlling lateral movement of vehicle bodies Expired - Lifetime EP0584182B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB919110978A GB9110978D0 (en) 1991-05-21 1991-05-21 Apparatus for controlling lateral movement of vehicle bodies
GB9110978 1991-05-21
PCT/GB1992/000926 WO1992020559A1 (en) 1991-05-21 1992-05-21 Apparatus for controlling lateral movement of vehicle bodies

Publications (2)

Publication Number Publication Date
EP0584182A1 EP0584182A1 (en) 1994-03-02
EP0584182B1 true EP0584182B1 (en) 1995-11-02

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EP92910538A Expired - Lifetime EP0584182B1 (en) 1991-05-21 1992-05-21 Apparatus for controlling lateral movement of vehicle bodies

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EP (1) EP0584182B1 (en)
JP (1) JPH06510718A (en)
AT (1) ATE129673T1 (en)
AU (1) AU1787092A (en)
CA (1) CA2109607A1 (en)
CZ (1) CZ249893A3 (en)
DE (1) DE69205826T2 (en)
ES (1) ES2081109T3 (en)
GB (1) GB9110978D0 (en)
HU (1) HUT66338A (en)
SK (1) SK129793A3 (en)
WO (1) WO1992020559A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1261281B (en) * 1993-03-19 1996-05-09 Fiat Ferroviaria Spa ANTI-CENTRIFUGAL ACTIVE LATERAL SUSPENSION FOR RAILWAY ROLLS
DE4420367C1 (en) * 1994-06-10 1995-08-17 Talbot Waggonfab Cross suspension for a rail vehicle and method for controlling it
DE19512437A1 (en) * 1995-04-03 1996-10-10 Rexroth Mannesmann Gmbh Device for compensating the lateral force acting on a rail vehicle
CH691462A5 (en) * 1995-10-05 2001-07-31 Sig Schweiz Industrieges Method for passive centring of railway coach wagon; involves using speed-dependent transverse spring element connected between coach wagon and bogie, to centre wagon in its central bearing
ES2638874T3 (en) * 2009-03-06 2017-10-24 Construcciones Y Auxiliar De Ferrocarriles, S.A. Tilt control system for rail vehicles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826202A (en) * 1973-03-12 1974-07-30 Budd Co Pneumatically sprung railway car truck
US3889607A (en) * 1974-07-05 1975-06-17 Evans Prod Co Car rock and roll hydraulic side bearing stabilizing arrangement
DE2850878C2 (en) * 1978-11-24 1983-09-15 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Weighing beam-less bogie with air suspension for rail vehicles
IT1159021B (en) * 1983-06-01 1987-02-25 Fiat Ferroviaria Savigliano TRANSVERSAL SUSPENSION WITH VARIABLE CHARACTERISTICS FOR RAILWAY VEHICLES

Also Published As

Publication number Publication date
HUT66338A (en) 1994-11-28
ATE129673T1 (en) 1995-11-15
ES2081109T3 (en) 1996-02-16
CA2109607A1 (en) 1992-12-26
SK129793A3 (en) 1994-07-06
WO1992020559A1 (en) 1992-11-26
DE69205826T2 (en) 1996-05-15
AU1787092A (en) 1992-12-30
JPH06510718A (en) 1994-12-01
EP0584182A1 (en) 1994-03-02
DE69205826D1 (en) 1995-12-07
CZ249893A3 (en) 1994-03-16
GB9110978D0 (en) 1991-07-10

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