DE102020117630A1 - Brake pad and brake pad device of a rail vehicle - Google Patents

Abstract

A brake pad (3) of a rail vehicle that 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, and a pad holder (32) on a friction lining ( 31) arranged on the side facing away, the driving bridge (33) having a plurality of supporting legs (34) 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 driving bridge (33 ) in the area 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, with one edge of the recess (35 ) an insertion tongue (37) extending in the longitudinal direction (x) of the pad holder (32) protrudes. Furthermore, a brake pad device (1) of a rail vehicle is described.

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 further 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. A driving bridge is also attached to the lining carrier, which is inserted into a recess in the brake pad holder provided for this purpose when the brake pad is mounted on the brake pad holder.

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

The spring latch, in its capacity as a bending beam, 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 bolt, it is supported on the brake pad holder and clamps the brake pad tightly to the brake pad by means of a bending spring effect through contact in the driver bridge.

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

The problem with the brake pads and brake pad holders known from the prior art is that the introduction of the spring bolt into the driving bridge is sometimes difficult because the threading point for the spring bolt is difficult or impossible to see.

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

Here, when inserting the spring bolt, the respective recesses of the driving bridges must be made at the same time for the implementation of the spring bolt.

In addition, tolerances of the driving bridge and the brake block holder mean that at least one end of such a spring bolt takes a position that is unfavorable for threading in relation to the respective driving bridge, which makes it more difficult to mount the brake pads on the brake block 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 bolt can be carried out simply and quickly.

Another object of the invention is to improve a brake pad device of a rail vehicle in such a way 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 that can be fastened to a brake pad holder and has the features of claim 1 and by a brake pad device of a rail vehicle with the features of claim 9.

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

The driving bridge has several support legs which are connected to one another by a web and 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 bolt with which the brake pad can be fixed on the brake pad holder under spring tension.

An insertion tongue extending in the longitudinal direction of the lining holder protrudes from one edge of the recess.

By providing such an insertion tongue, the end of a spring bolt can be safely inserted into the recess of the driving bridge when the spring bolt is inserted into the brake block holder and the driving bridge.

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

Advantageous variant embodiments of the invention are the subject matter of the subclaims.

According to an advantageous embodiment variant, the insertion tongue extends as an extension of the web.

This enables such a driving bridge to be produced in a simple manner, in particular as a stamped sheet metal bent part, in which the recess can be punched out in a simple manner and the driving bridge can then be bent into the desired shape.

According to a preferred embodiment variant, the insertion tongue is bent, starting from the web, in a direction away from the friction lining.

This makes it possible for the tip of the spring bolt to be guided reliably into the recess of the drive bridge along the underside of the insertion tongue facing the friction lining if the tip of the spring bolt is incorrectly applied.

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 driving bridge. In principle, however, it is also conceivable to push the spring bolt forward into the driving bridge, for example up to the inside of the support leg of the driving bridge arranged opposite the recess.

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

This enables the use of such a driving 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 orientation of the driving 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 bounding by an edge of the support leg.

Such a preferably additional insertion tongue also facilitates the insertion of the free end of the spring bolt when the recess of the driving bridge initially misses sideways.

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

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 fastened to the brake pad holder and a spring clip lockable 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 bolt are provided in the inner walls of the brake block holder that delimit 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 receiving the driving bridge of one brake pad each, for the formation of a so-called double pad unit.

According to a preferred embodiment, the brake pads are held on the brake pad holder by means of a single spring bolt, which enables the two ends of the spring bolt to be threaded in easily through the inventive insertion tongues of the driving bridge of the respective brake pad.

According to a preferred embodiment variant, the spring latch itself is chamfered at 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 before it is fixed by the spring latch,
• 2 an isometric representation of a variant embodiment of a brake pad according to the invention,
• 3 an enlarged section of the area marked III in 1 with in the Aus taking the driving bridge slightly protruding spring latch and
• 4th an enlarged view of the in 1 with IV designated section, in which a free end of the spring bolt does not protrude into the recess of the driving bridge.

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

These terms are not to be understood as restrictive, i.e. these references may change as a result of different working positions or the mirror-symmetrical design or the like.

In 1 is denoted by the reference numeral 1 as a whole, a variant 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 fastened 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 lockable spring clip 4 that can be locked on the brake pad holder 2 is used to fix the brake pads 3.

The spring clip 4 shown here has two free ends 41 aligned in a longitudinal direction x of the brake pad 3, which are provided for fixing the brake pads 3 on the brake pad holder 2 through recesses 21 in the brake pad holder 2 and through a respective driving bridge 33 of the brake pad 3. or to be pushed through and so fix 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 in this case in a section through the brake pad device 1 viewed in an XZ plane, as shown in FIG 1 is shown, designed 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 is shown in 2 is characterized by the direction Y, opposing openings 23 are provided in these inner walls, through which the ends 49 of the spring bolt 4 can be passed.

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

A variant of a brake pad 3 according to the invention is shown in FIG 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 FIG 1 is shown, adapted to the groove-shaped recess 21 of the brake pad holder 2, approximately U-shaped, with a central web 36, from which four support legs 34 extend in the embodiment variant shown here.

The free ends of these support legs 34 are non-positively, positively or cohesively connected to the lining holder 32.

A recess 35 is provided between the support legs 34 on each side of the U-shaped driver bridge 33, which recess 35 serves to receive a section of the spring bolt 4.

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

The insertion tongues 37 extend here as an extension of the web 36 between 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.

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

In the embodiment variant shown here, the web 36 of the driving bridge 33 is also curved concavely towards the friction lining when viewed in the longitudinal direction of the lining holder 32. This bend is preferably retained in the insertion tongues 37.

It is also conceivable, however, to design the bending radius of the insertion tongues 37 differently relative to the bending radius of the web 36 of the driving bridge 33.

It is also conceivable to form such an insertion tongue 37 on a substantially perpendicular to the longitudinal extent of the pad holder 32 extending support legs 34, which then also extend in the longitudinal direction of the pad holder 32 and thus a deviation of the free end 41 of the spring bolt 4 when threading into the recess 35 facilitate.

It is also conceivable to form a plurality of such tongues on the driving bridge 33 in order to create a kind of funnel opening which makes it easier to thread the free ends 41 of the spring bolt 4.

Instead of the in 1 The single spring bolt 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 bolt 4 for each of the brake pads 3.

In 4th a position of a first free end 41 of the spring bolt 4 is shown in front of the entry into the recesses 35 of the driving bridge 33.

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

The position of the free end 41 of the spring bolt 4 protruding into the recess 35 of the driving bridge 33 is shown in FIG 3 shown, in which it can be clearly seen that a trouble-free assembly is made possible here in a simple manner.

List of reference symbols

1

Brake pad device

2

Brake pad holder

21

Recess

22nd

Inner wall

23

opening

3

Brake pad

31

Friction lining

32

Pad holder

33

Transport bridge

34

Support legs

35

Recess

36

web

37

Insertion tongue

4th

Spring latch

41

free end

x

Longitudinal direction

y

direction

z

direction

Claims (12)

Brake block (3) of a rail vehicle, which can be fastened to a brake block holder (2) and has a friction lining (31), a lining holder (32) to which the friction lining (31) is attached, one on the lining holder (32) on one of the friction lining (31) ) facing away from the driving bridge (33) The area of the support legs (34) has at least one recess (35) for receiving a section of a spring bolt (4) with which the brake pad (3) can be fixed on the brake pad holder (2) under spring tension, characterized in that from one edge of the recess ( 35) an insertion tongue (37) extending in the longitudinal direction (x) of the lining holder (32) protrudes. Brake pad (3) Claim 1 , characterized in that the insertion tongue (37) extends as an extension of the web (36). Brake pad (3) Claim 2 , characterized in that the insertion tongue (37) is bent starting from the web (36) in a direction away from the friction lining (31). Brake pad (3) according to one of the preceding claims, 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) Claim 4 , characterized in that, viewed in the longitudinal direction (x) of the lining holder (32), an insertion tongue (37) is formed on both sides of the web (36). Brake pad (3) according to one of the preceding claims, characterized in that the insertion tongue (37) or a further insertion tongue (37) extends from a lateral edge of the recess (35) bounding by an edge of the support leg (34). Brake pad (3) according to one of the preceding claims, characterized in that the driving bridge (33) is designed as a stamped sheet metal part which is fixed with the free ends of the support legs (34) on the lining holder (32). Brake pad (3) according to one of the preceding claims, characterized in that the web (36) of the driving bridge (33) is curved concavely towards the friction lining when viewed in the longitudinal direction (x) of the lining holder (32). Brake pad device (1) of a rail vehicle, comprising a brake pad holder (2), at least one brake pad (3) fastened to the brake pad holder (2), a spring clip (4) which can be locked on the brake pad holder (2) for fixing the at least one brake pad (3), wherein the brake pad holder (2) has at least one recess (21) for receiving a driving bridge (33) of the brake pad (3), wherein in the recess (21) delimiting inner walls (22) of the brake pad holder (2) openings (23) for introducing the Spring latch (4) are provided, characterized in that the brake pad (3) is designed according to one of the preceding claims. Brake pad device (1) Claim 9 , characterized in that the brake pad holder (2) has two recesses (21) for receiving the driving bridge (33) each with a brake pad (3). Brake pad device (1) Claim 10 , characterized in that the brake pads (3) are held on the brake pad holder (2) by means of a single spring bolt (4). Brake pad device (1) according to one of the Claims 9 until 11th , characterized in that at least one of the free ends (41) of the spring bolt (4) are chamfered.

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