DE102020117630B4 - Brake pad and brake pad device of a rail vehicle - Google Patents

Abstract

Brake pad (3) of a rail vehicle which can be fastened to a brake pad holder (2), has a friction lining (31), a lining holder (32) to which the friction lining (31) is fastened, a brake pad on the lining holder (32) on one of the friction lining (31) entrainment bridge (33) arranged on the side facing away, the entrainment bridge (33) having a plurality of support legs (34) which are connected to one another by a web (36) and spaced apart from one another in the longitudinal direction (x) of the pad holder (32), the entrainment bridge (33) being in the region the support leg (34) has at least one recess (35) for receiving a section of a spring latch (4) with which the brake block (3) can be fixed to the brake block holder (2) under spring pretension, characterized in that one edge of the recess (35) an insertion tongue (37) extending in the longitudinal direction (x) of the pad holder (32) protrudes, the insertion tongue (37) extending as an extension of the web (36) and starting from the web (36) in an R direction is bent away from the friction lining (31).

Description

The present invention relates to a brake pad of a rail vehicle that can be fastened to a brake pad holder according to the preamble of claim 1. The invention also relates to a brake pad device of a rail vehicle.

Such brake pads are mounted in so-called brake pad holders of pad brake units by means of spring latches.

Such a brake pad has a friction lining and a lining carrier to which the friction lining is attached. Furthermore, a carrier bridge is fastened to the pad carrier and is inserted into a recess of the brake pad holder provided for this purpose when the brake pad is installed on the brake pad holder.

Thereafter, the spring latch mentioned above is pushed through a recess in the brake pad holder and a recess in the driving bridge of the brake pad.

In its capacity as a bending beam, the spring latch builds up a spring preload which holds the brake pad in its contact position on the brake pad holder.

In the assembly position of the spring latch, it is supported on the brake pad holder and clamps the brake pad by contact with the driver bridge on the brake pad using the bending spring effect.

In the assembled state, the braking force generated as the frictional force between the brake pad and the rail wheel can then be positively transmitted to the brake pad holder via the carrier bridge of the brake pad.

From the U.S. 1,117,366 A discloses a brake pad holder with a brake pad attached thereto, in which a pad holder is designed in two parts, the pad holder parts being connected to one another via a hinge in the region of one half of a carrier bridge formed on the respective pad holder part. The driver bridge halves each have a recess through which a bolt can be pushed, which is used to attach the pad holder to the brake pad holder. In order to prevent damage to the hinge, the sheet metal pieces cut out to produce the recesses are bent over into the interior of the carrier bridge towards the hinge.

From the DE 602 00 083 T2 Another brake pad holder with a brake pad attached thereto is known, in which the pad holder has a carrier bridge with a recess through which a pin for attaching the pad holder to the brake pad holder can be guided. The carrier bridge has a concavely curved web in the middle.

From the DE 33 03 772 A1 a brake pad shoe is known, with a brake pad holder, a brake pad attached thereto and a spring latch that can be locked on the brake pad holder for fixing the brake pad. Here, too, the spring latch is pushed through recesses in a driver bridge of the brake pad to fix the brake pad.

The problem with the brake pads and brake pad holders known from the prior art is that it is sometimes difficult to insert the spring bar into the carrier bridge, since the threading point for the spring bar is difficult or impossible to see.

This problem occurs particularly in so-called double pad units, in which two brake pads are to be attached to a brake pad holder in the manner described above.

Here, when inserting the spring bolt, the respective recesses of the carrier bridges must be hit at the same time for the spring bolt to pass through.

In addition, tolerances of the carrier bridge and the brake pad holder mean that at least one end of such a spring latch assumes an unfavorable position relative to the respective carrier bridge for threading, making it difficult to mount the brake pads on the brake pad holder.

The object of the present invention is to further develop a brake pad for such a brake pad holder in such a way that the introduction of the spring latch can be carried out easily and quickly

is, and to improve a brake pad device of a rail vehicle to the effect that the assembly of the brake pad or the brake pads on the brake pad holder is simplified.

This object is achieved by a brake pad which can be fastened to a brake pad holder and which has the features of claim 1 and by a brake pad device of a rail vehicle which has the features of claim 7 .

The brake pad holder according to the invention has a friction lining, a lining holder to which the friction lining is attached and to the lining Holder on a driving bridge arranged on a side facing away from the friction lining.

The carrier bridge has a plurality of support legs which are connected to one another by a web and are spaced apart from one another in the longitudinal direction of the lining holder.

The driving bridge in the area of the support legs has at least one recess for receiving a section of a spring latch with which the brake pad can be fixed to the brake pad holder under spring preload.

In this case, an insertion tongue extending in the longitudinal direction of the pad holder protrudes from an edge of the recess.

The insertion tongue extends as an extension of the web and, starting from the web, is bent in a direction away from the friction lining.

By providing such an insertion tab, the end of a spring bar can be securely inserted into the recess of the cleat when the spring bar is inserted into the brake pad holder and the cleat.

The insertion tongue ensures that the end of the spring latch does not miss the recess in the carrier bridge or effectively prevents a collision with an edge of the carrier bridge that delimits the recess, even in the case of unfavorable tolerance combinations of the components.

The extension of the insertion tongue as an extension of the web enables simple production of such a carrier bridge, in particular as a stamped and bent sheet metal part, in which the recess can be punched out in a simple manner and the carrier bridge can then be bent into the desired shape.

The bending of the insertion tongue starting from the web in a direction away from the friction lining makes it possible for the tip of the spring bolt to be guided reliably and slidably into the recess of the carrier bridge along the underside of the insertion tongue facing the friction lining if the tip of the spring bolt is not applied precisely.

Advantageous variants of the invention are the subject matter of the dependent claims.

In a further preferred embodiment variant, viewed in the longitudinal direction of the pad holder, a recess is formed on both sides of the web.

This enables the spring bolt to be pushed through the carrier bridge. In principle, however, it is also conceivable for the spring bolt to be advanced into the carrier bridge, for example up to the inside of the support leg of the carrier bridge arranged opposite the recess.

According to a further preferred embodiment variant, such an insertion tongue is formed on both sides of the web of the carrier bridge, viewed in the longitudinal direction of the lining holder.

This allows the use of such a carrier bridge for mounting on the pad holder of the brake pad regardless of the alignment of the brake pad on the brake pad holder or the alignment of the carrier bridge relative to the pad holder.

According to a further preferred embodiment variant, the insertion tongue or a further insertion tongue extends from a lateral edge of the recess delimited by an edge of the support leg.

Such a preferably additional insertion tongue also facilitates the insertion of the free end of the spring latch when the recess of the carrier bridge is initially missed laterally.

According to a further preferred embodiment variant, the web of the carrier bridge is bent concavely towards the friction lining, viewed in the longitudinal direction of the lining holder.

This further improves the preload of the brake pad on the pad holder.

The brake pad device according to the invention of a rail vehicle has a brake pad holder and at least one brake pad attached to the brake pad holder and a spring latch that can be locked on the brake pad holder for fixing the at least one brake pad.

The brake pad holder has at least one recess for receiving a driving bridge of the brake pad.

Openings for inserting the spring latch are provided in the inner walls of the brake pad holder delimiting the recess. The brake pad is designed as described above.

According to a preferred embodiment of such a brake pad device, the brake pad holder has two such recesses for accommodating the carrier bridge, one in each case Brake pad to form a so-called double pad unit.

According to a preferred embodiment, the brake pads are held by a single spring bar on the brake pad holder, which allows the insertion tongues of the driving bridge of the respective brake pad in a simple manner the threading of the two ends of the spring bar.

According to a preferred embodiment variant, the spring latch itself is chamfered on at least one of its free ends, which further promotes sliding along the insertion tongue.

• 1 eine Schnittansicht durch eine Ausführungsvariante einer erfindungsgemäßen Bremsklotzeinrichtung mit daran befestigten Bremsklötzen vor der Festlegung durch den Federriegel,
• 2 eine isometrische Darstellung eines Ausführungsvariante eines erfindungsgemäßen Bremsklotzes,
• 3 eine Ausschnittvergrößerung des mit III bezeichneten Bereichs in 1 mit in die Ausnehmung der Mitnahmebrücke geringfügig vorstehendem Federriegel und
• 4 eine vergrößerte Darstellung des in 1 mit IV bezeichneten Ausschnitts, bei dem ein freies Ende des Federriegels noch nicht in die Ausnehmung der Mitnahmebrücke vorsteht.

Preferred exemplary embodiments are explained in more detail below with reference to the accompanying drawings. Show it:

• 1 a sectional view through an embodiment variant of a brake pad device according to the invention with brake pads attached to it before it is fixed by the spring latch,
• 2 an isometric representation of an embodiment of a brake pad according to the invention,
• 3 an enlargement of the area marked III in 1 with the spring latch protruding slightly into the recess of the carrier bridge and
• 4 an enlarged view of the in 1 Section designated IV, in which a free end of the spring latch does not yet protrude into the recess of the carrier bridge.

In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the brake pad holder, brake pad, friction lining, pad holder, spring latch, carrier bridge, recess and the like selected in the respective figures.

These terms are not to be understood as limiting, i.e. these references can change due to different working positions or the mirror-symmetrical design or the like.

In 1 is denoted by the reference numeral 1 overall an embodiment of a brake pad device according to the invention of a rail vehicle.

The brake pad device 1 has a brake pad holder 2 to which two brake pads 3 are attached in the exemplary embodiment shown here.

It is also conceivable to design the brake pad holder 2 in such a way that only one such brake pad 3 can be fastened to it.

It is also conceivable to design a brake pad holder 2 in such a way that more than two such brake pads 3 can be fastened to it.

In the exemplary embodiment shown, a spring latch 4 that can be locked on the brake pad holder 2 is used to fix the brake pads 3 in place.

The spring latch 4 shown here has two aligned in a longitudinal direction x of the brake pad 3 free ends 41, which are provided to fix the brake pads 3 on the brake pad holder 2 by recesses 21 of the brake pad holder 2 and by a respective driving bridge 33 of the brake pad 3 or to be pushed through and thus set the brake pads 3 on the brake pad holder 2 under spring tension.

The recesses 21 provided on the underside of the brake pad holder 2 facing the brake pads 3 are shown in a section through the brake pad device 1 viewed in an XZ plane, as shown in FIG 1 is shown, as a U-shaped open recesses 21 delimited towards the brake pad by inner walls 22 .

Central to the width of the brake pad holder 2, which in 2 characterized by the direction Y, opposite openings 23 are provided in these inner walls, through which the ends 49 of the spring latch 4 can be passed.

Next are in 1 two brake pads 3 are shown, each of which protrudes into one of the recesses 21 of the brake pad holder 2 with their driving bridges 33 .

An embodiment variant of a brake pad 3 according to the invention is in 2 shown.

The brake pad 3 has a friction lining 31 , a lining holder 32 to which the friction lining 31 is fastened, and a carrier bridge 33 arranged on the lining holder 32 on a side facing away from the friction lining 31 .

The driving bridge 33 is viewed in the longitudinal direction x of the pad holder 32, as shown in 1 is shown adapted to the groove-shaped recess 21 of the brake pad holder 2 approximately U-shaped forms, with a central web 36, from which four support legs 34 extend in the embodiment shown here.

The free ends of these support legs 34 are connected to the pad holder 32 in a force-, form- or material-locking manner.

A recess 35 is provided between the support legs 34 on each side of the U-shaped carrier bridge 33 and serves to accommodate a section of the spring latch 4 .

As in 2 shown further, insertion tongues 37 extending in the longitudinal direction x of the pad holder 32 protrude from the edge of the recess 35 .

The insertion tongues 37 extend here as an extension of the web 36 between the respective support legs 34.

In addition to the embodiment variant shown here, it is also conceivable to form only one such insertion tongue 37 on the carrier bridge 33 .

How further in 2 As can be seen, the two insertion tongues 37 shown here are bent in a direction away from the friction lining 31 , starting from the web 36 .

The web 36 of the driving bridge 33 is also bent concavely towards the friction lining in the embodiment variant shown here, viewed in the longitudinal direction of the pad holder 32 . This bend is preferably maintained in the insertion tabs 37.

However, it is also conceivable to design the bending radius of the insertion tongues 37 differently relative to the bending radius of the web 36 of the carrier bridge 33 .

It is also conceivable to form such an insertion tongue 37 on a support leg 34 that extends essentially perpendicularly to the longitudinal extension of the pad holder 32, which then also extend in the longitudinal direction of the pad holder 32 and thus prevents the free end 41 of the spring latch 4 from deviating when it is threaded into the recess 35 facilitate.

It is also conceivable to mold several such tongues onto the carrier bridge 33 in order to create a type of funnel opening that facilitates the threading in of the free ends 41 of the spring bar 4 .

Instead of the in 1 For the single spring bar 4 shown as an example with two free ends 41 for threading into the recesses 35 of the respective driving bridges 33 of the two brake pads 3, it is also conceivable to provide a separate spring bar 4 for each of the brake pads 3.

In 4 a position of a first free end 41 of the spring bolt 4 before it enters the recesses 35 of the carrier bridge 33 is shown.

It can already be clearly seen here that the design of the recess 35 with the insertion tongue 37 extending therefrom means that the free end 41 of the spring bar 4 can be inserted into the recess 35 without any problems.

The position of the free end 41 of the spring latch 4 protruding into the recess 35 of the carrier bridge 33 is in 3 shown, in which it is easy to see that trouble-free assembly is made possible here in a simple manner.

reference list

1

brake pad device

2

brake pad holder

21

recess

22

inner wall

23

opening

3

brake pad

31

friction lining

32

pad holder

33

take-along bridge

34

support leg

35

recess

36

web

37

insertion tongue

4

spring latch

41

free end

x

longitudinal direction

y

Direction

e.g

Direction

Claims (10)

Brake pad (3) of a rail vehicle, which can be fastened to a brake pad holder (2), has a friction lining (31), a lining holder (32), to which the friction lining (31) is fastened, a pad holder (32) on a friction lining (31 ) remote side arranged mitnah measuring bridge (33), wherein the carrier bridge (33) has a plurality of support legs (34) which are connected to one another by a web (36) and are spaced apart from one another in the longitudinal direction (x) of the pad holder (32), the carrier bridge (33) being in the region of the support legs ( 34) has at least one recess (35) for receiving a section of a spring latch (4) with which the brake pad (3) can be fixed to the brake pad holder (2) under spring pretension, characterized in that from one edge of the recess (35) there is a in the longitudinal direction (x) of the pad holder (32), the insertion tongue (37) extending as an extension of the web (36) and, starting from the web (36), bent in a direction away from the friction lining (31). is. Brake pad (3) after claim 1 , characterized in that viewed in the longitudinal direction (x) of the lining holder (32), a recess (35) is formed on each side of the web (36). Brake pad (3) after claim 2 , characterized in that viewed in the longitudinal direction (x) of the pad holder (32), an insertion tongue (37) is formed on both sides of the web (36). Brake block (3) according to one of the preceding claims, characterized in that the insertion tongue (37) or another insertion tongue (37) extends from a lateral edge of the recess (35) delimited by an edge of the support leg (34). Brake block (3) according to one of the preceding claims, characterized in that the driving bridge (33) is designed as a stamped and bent sheet metal part which is fixed to the pad holder (32) with the free ends of the support legs (34). Brake block (3) according to one of the preceding claims, characterized in that the web (36) of the driving bridge (33) viewed in the longitudinal direction (x) of the lining holder (32) is bent concavely towards the friction lining. Brake block device (1) of a rail vehicle, having a brake block holder (2), at least one brake block (3) fastened to the brake block holder (2), a spring latch (4) which can be locked on the brake block holder (2) for fixing the at least one brake block (3), wherein the brake pad holder (2) has at least one recess (21) for receiving a carrier bridge (33) of the brake pad (3), with openings (23) in the inner walls (22) of the brake pad holder (2) delimiting the recess (21) for inserting the Spring bolt (4) are provided, characterized in that the brake block (3) is designed according to one of the preceding claims. Brake pad device (1) after claim 7 , characterized in that the brake pad holder (2) has two recesses (21) for receiving the driving bridge (33) each having a brake pad (3). Brake pad device (1) after claim 8 , characterized in that the brake pads (3) are held on the brake pad holder (2) by means of a single spring bar (4). Brake pad device (1) according to one of Claims 7 until 9 , characterized in that at least one of the free ends (41) of the spring bar (4) are chamfered.

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