EP0594057B1 - Dispositif pour le mouvement parallèle d'un sabot de frein - Google Patents

Dispositif pour le mouvement parallèle d'un sabot de frein Download PDF

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Publication number
EP0594057B1
EP0594057B1 EP93116624A EP93116624A EP0594057B1 EP 0594057 B1 EP0594057 B1 EP 0594057B1 EP 93116624 A EP93116624 A EP 93116624A EP 93116624 A EP93116624 A EP 93116624A EP 0594057 B1 EP0594057 B1 EP 0594057B1
Authority
EP
European Patent Office
Prior art keywords
parallel
brake
parallel rod
friction element
sleeve
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
EP93116624A
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German (de)
English (en)
Other versions
EP0594057A1 (fr
Inventor
Manfred Bartlechner
Erich Fuderer
Josef Staltmeir
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.)
Knorr Bremse AG
Original Assignee
Knorr Bremse AG
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 Knorr Bremse AG filed Critical Knorr Bremse AG
Publication of EP0594057A1 publication Critical patent/EP0594057A1/fr
Application granted granted Critical
Publication of EP0594057B1 publication Critical patent/EP0594057B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H1/00—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like
    • B61H1/003—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like with an actuator directly acting on a brake head

Definitions

  • the present invention relates to a device for parallel guiding of the brake shoe of a vehicle brake, which is particularly suitable for rail vehicles, with a hanging tab with one end of the vehicle frame and the other end is rotatably attached to the brake shoe of the brake block so that the braking forces be transferred to the vehicle frame by means of this hanging bracket.
  • this friction element is suitable for one-piece brake pads on the brake shoe to ensure satisfactory guidance of the brake pad, it is not able to with two-piece Brake pads, which enclose a larger circular arc on the impeller, to ensure exact parallel guidance at all points of the impeller. In extreme cases it can happen that the tip of the brake pad actually still touches the tread of the wheel to be braked when the brake is released, while the rest of the brake pad has already reached a sufficient distance from the tread of the wheel. This results in unwanted uneven wear profiles of the brake pads. Furthermore, it is felt to be disadvantageous in the known construction of the brake pad brake that when the friction elements between the shoe and the spindle are in place an additional bending load on the spindle occurs, which at least promotes the wear of the spindle.
  • the device for parallel guidance of the brake shoe of a brake shoe brake of a vehicle in particular a rail vehicle with a hanging bracket, which is rotatably fastened at one end to the vehicle frame and at the other end rotatably attached to the braking shoe, is characterized by an additional parallel link which is arranged parallel to the hanging bracket is so that its pivot points together with the pivot points of the hanging bracket describe a geometric figure in which at least two opposite sides are parallel, and the other two ends of the parallel link are coupled via a friction element.
  • the parallel link is particularly advantageous to fasten the parallel link with its one end rotatably to the vehicle frame and with its other end to the brake shoe so that the longitudinal axis of the parallel link is arranged parallel to the longitudinal axis of the hanging bracket. It is also advantageous that the parallel link is approximately as long as the hanging bracket and the distance between the two longitudinal axes is not chosen too large.
  • the friction element according to the invention is accommodated in the sleeve of the parallel link and is embedded in a dustproof manner by a cover part in the sleeve.
  • the friction element can consist of a tensioning sleeve or a wrap spring which, according to the invention, frictionally fits around the shaft of a bolt projecting into the sleeve.
  • the frictional force exerted by the friction element on the bolt is only overcome according to the invention if the position of the brake shoe moves due to a vertical or horizontal axis movement of the impeller when the brake is braked. This also changes the length of the parallel link and thus ensures that the entire brake pad runs parallel when the brake is released.
  • a block brake is shown schematically with its essential parts.
  • the entire drive mechanism, which mechanically operates the brake pad unit, is located in the housing 1.
  • a ball head 6 which transmits the force of the actuating mechanism 1 to the brake shoe 2.
  • the ball head 6 is seated in a bearing shell which, due to a special mechanism in the ball head, allows only two degrees of freedom of movement of the brake pad, which are necessary when braking.
  • the housing 1 is firmly connected to the vehicle frame 4.
  • On the brake shoe 2 are the brake pads 2 ', which are formed in two parts in the present case.
  • a hanging bracket 3 connects the vehicle frame 4 to the brake shoe 2, wherein the upper end of the hanging bracket 3 is rotatably connected to the vehicle frame 4 on a bolt 14 and the lower end of the hanging bracket 3 is rotatably connected to the brake shoe 2 on a bolt 15.
  • the hanging bracket 3 transmits the braking force from the brake pad 2 to the chassis 4.
  • the parallel link 5 according to the invention is arranged in the immediate vicinity of the hanging bracket so that the central axis of the parallel link 5 is arranged parallel to the central axis of the hanging bracket 3.
  • the parallel link 5 according to the invention consists in principle of two parts which are arranged displaceably against one another.
  • the upper part 10 is rotatably connected to the vehicle frame 4, while the lower part 15 of the parallel link 5 is rotatably connected to the brake shoe 2.
  • the upper part 10 of the parallel link 5 has a bore at the upper end into which the retaining bolt engages.
  • the lower part of this part 10 is designed in a sense as a sleeve. In this lower part there is a bore 9 into which the bolt shaft 8 of the second part 15 of the parallel link 5 projects.
  • Friction element made of a wrap spring 7, which fits frictionally around the bolt 8.
  • This wrap spring 7 can also be replaced by another friction element such as an adapter sleeve.
  • the friction element 7 is secured dust-tight against displacement by a cover 11.
  • the cover element 11 has a threaded pin 20, the thread of which engages in the internal thread 13 of the sleeve 10.
  • a sealing ring 12 is provided in the cover part 11.
  • the operation of the device according to the invention is as follows.
  • This movement is effected by the parallel link 5 according to the invention, because the brake shoe 2 is guided by the parallel guidance of the suspension bracket 3 on the one hand and by the parallel link 5 on the other hand at a certain height during a horizontal movement of the brake block. This is of particular importance when releasing the brake, since otherwise a tip of the brake block 2 'could still touch the tread of the wheel after releasing the brake, so that uniform wear of the lining 2' would not be guaranteed if the brake was not parallel.
  • the parallel link 5 ensures parallel guidance when releasing the brake at any possible height of the brake shoe 2.
  • the adjustment of the brake shoe 2 relative to the tread of the vehicle wheel takes place during the Brake pads 2 'are pressed against the tread of the vehicle wheel.
  • the frictional forces between the friction element for example a clamping ring and the friction surface of the bolt 8
  • This new position of the parallel link is held by the said frictional forces until a new adjustment has occurred either by braking or by shifting the axle position of the vehicle wheel. This always results in a uniform lifting of the brake pad from the tread of the vehicle wheel.
  • FIG. 1 A further exemplary embodiment of a parallel link 5 according to the invention is shown in FIG.
  • This parallel link 5 also consists of an upper 23 and a lower 24 part, which can be moved against each other when the prevailing frictional forces are overcome.
  • a new length of the parallel link 5 is also set here.
  • Two friction surfaces 17, 18 of the upper part 23 and of the lower part 22 are pressed together with two clamping screws 19. Between the two friction surfaces 17, 18 there is a friction lining 20, which has a different thickness depending on the abrasion.
  • the clamping screws 19 are pre-tensioned by suitable disc springs 21, so that an approximately uniform pressure always acts on the friction surfaces of the friction elements.
  • the lower part 22 of the parallel link 5 has two threaded bores 25 into which the thread of the tensioning screws 19 engages.
  • the upper part 23 of the parallel link 5 has two elongated holes 24, within the limits of which the two parts 22 and 23 can move against each other.
  • this embodiment also represents a suitable means for parallel guidance of the brake shoe 2.
  • the present invention presents a device which allows the brake pad of a vehicle brake to be lifted evenly from the braking surface of the vehicle wheel to be braked, particularly when the brake is released. This ensures uniform wear of the brake pads (2 ').
  • the parallel guidance of the brake shoe (2) is caused by a parallel link (5) according to the invention, the length of which, after overcoming a certain frictional force, is set continuously depending on the position of the vehicle wheel and is held in this position until a new adjustment is made.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Claims (11)

  1. Dispositif pour le guidage parallèle de la mâchoire de sabot de freinage (2) d'un frein à sabot de freinage d'un véhicule, en particulier d'un véhicule sur rails comportant une attache de suspension (3), qui, avec l'une de ses extrémités, est fixée à pivotement au châssis (4) du véhicule, et, avec son autre extrémité, est fixée à pivotement à la mâchoire de sabot de freinage (2), caractérisé par
    - un élément de direction additionnel (5) parallèle, qui est agencé parallèle à l'attache de suspension (3), de sorte que ses points de pivotement décrivent, ensemble avec les points de pivotement de l'attache de suspension (3), une figure géométrique, dans laquelle au moins deux côtés opposés se trouvent parallèles; et
    - les deux autres extrémités de l'élément de direction (5) parallèle sont couplées par l'intermédiaire d'un élément de friction.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément de direction (5) parallèle est, avec l'une de ses extrémités, fixé à pivotement au châssis (4) du véhicule, et est, avec son autre extrémité, fixé à pivotement à la mâchoire de sabot de freinage (2).
  3. Dispositif selon la revendication 1, caractérisé en ce que l'axe longitudinal de l'élément de direction (5) parallèle est agencé parallèle à l'axe longitudinal de l'attache de suspension (3).
  4. Dispositif selon la revendication 1, caractérisé en ce que l'élément de direction (5) parallèle est approximativement aussi long que l'attache de suspension (3).
  5. Dispositif selon la revendication 1, caractérisé en ce que l'élément de friction est constitué par une douille de contrainte.
  6. Dispositif selon la revendication 1, caractérisé en ce que l'élément de friction est constitué par un ressort enroulé (7).
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'élément de friction (7) est mis en place sur un axe-tige (8) de la partie de l'élément de direction (5) parallèle, qui fait saillie dans l'alésage (9) d'un manchon (10) entourant l'axe-tige (8).
  8. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'alésage (9) dans le manchon (10) est obturé par une partie de recouvrement (11) munie d'une bague d'étanchéité (12), la partie de recouvrement (11) présentant une partie filetée (20), qui vient en prise dans le filetage intérieur (13) du manchon (10).
  9. Dispositif selon la revendication 1, caractérisé en ce que l'élément de direction (5) parallèle présente un élément de friction dont la garniture de friction (14) est agencée entre deux surfaces (17, 18), pressées l'une contre l'autre par des vis (19), de l'élément de direction (5) parallèle divisé en deux sections.
  10. Dispositif selon la revendication 9, caractérisé en ce que les vis (19) sont précontraintes par des rondelles-ressorts (21).
  11. Dispositif selon la revendication 9, caractérisé en ce qu'une section de l'élément de direction (5) parallèle présente des trous oblongs (24), à travers lesquels s'engagent les vis de contrainte (19).
EP93116624A 1992-10-20 1993-10-14 Dispositif pour le mouvement parallèle d'un sabot de frein Expired - Lifetime EP0594057B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4235310A DE4235310C2 (de) 1992-10-20 1992-10-20 Vorrichtung zur Parallelführung des Bremsklotzschuhs einer Klotzbremse
DE4235310 1992-10-20

Publications (2)

Publication Number Publication Date
EP0594057A1 EP0594057A1 (fr) 1994-04-27
EP0594057B1 true EP0594057B1 (fr) 1995-07-19

Family

ID=6470870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93116624A Expired - Lifetime EP0594057B1 (fr) 1992-10-20 1993-10-14 Dispositif pour le mouvement parallèle d'un sabot de frein

Country Status (4)

Country Link
EP (1) EP0594057B1 (fr)
AT (1) ATE125215T1 (fr)
DE (2) DE4235310C2 (fr)
ES (1) ES2074377T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103693069B (zh) * 2013-12-30 2016-05-18 常州南车铁马科技实业有限公司 踏面制动装置
CN108869582A (zh) * 2018-06-08 2018-11-23 滁州市外星人装备科技有限公司 一种汽车底盘制动器支架
JP7133380B2 (ja) * 2018-07-26 2022-09-08 ナブテスコ株式会社 姿勢制御装置及びブレーキ装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2150631A (en) * 1937-07-21 1939-03-14 Transit Res Corp Brake shoe linkage
FR67332E (fr) * 1954-12-18 1958-02-20 Westinghouse Freins & Signaux Frein à sabots perfectionné
FR2044623A1 (fr) * 1969-02-25 1971-02-26 Westinghouse Freins & Signaux
US3696892A (en) * 1971-02-08 1972-10-10 Gen Signal Corp Brake head-centering device for railway brake apparatus
US4241396A (en) * 1978-10-23 1980-12-23 International Business Machines Corporation Tagged pointer handling apparatus
DE3336983A1 (de) * 1983-10-11 1985-04-25 Knorr-Bremse GmbH, 8000 München Klotzbremse fuer schienenfahrzeuge

Also Published As

Publication number Publication date
ES2074377T3 (es) 1995-09-01
DE4235310A1 (de) 1994-04-21
ATE125215T1 (de) 1995-08-15
DE59300377D1 (de) 1995-08-24
EP0594057A1 (fr) 1994-04-27
DE4235310C2 (de) 1996-07-11

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