Brake pad holder for a rail vehicle

Abstract

A brake pad holder (2) for a brake pad bracket (1) of a rail vehicle has a pressure plate (21) with a guide channel (23) extending in the longitudinal direction of the brake pad holder (2), in which a brake pad (3) can be slidably and positively locked perpendicular to the normal of the pressure plate (21), a locking bolt (4) movably mounted on the pressure plate (21) for locking the brake pad (3) in the longitudinal direction of the brake pad holder (2), which projects into the guide channel (23) in a locking position fixing the brake pad (3) in its functional position and is removed from the guide channel (23) in a release position,wherein the locking bolt (4) has a locking piece (42) which, in its release position, projects beyond a side edge (28) of the pressure plate (21) and, in the locked position of the locking bolt (4), does not project beyond the side edge (27) of the pressure plate (21) beyond the underside (28). Furthermore, a brake pad holder (1) with a pad holder (2) is described.

Description

[0001] The present invention relates to a pad holder for a brake pad holder of a rail vehicle according to the preamble of claim 1.

[0002] The invention further relates to a brake pad holder for a rail vehicle.

[0003] Brake pads for disc brakes of rail vehicles are usually held by a pad holder which has a generally dovetail-shaped guide channel on its pressure plate facing the brake pad, the brake pad being held in the guide channel by a dovetail-shaped guide rib molded onto it.

[0004] To lock the brake pad, a locking bolt is pivotably held on the pad holder in the longitudinal direction of the pad holder, which protrudes into this guide channel in a locking position and is removed from the guide channel in a release position, thus enabling easy installation and removal of the brake pad.

[0005] Such a generic brake pad holder with a generic pad holder is known, for example, from DE 10 2019 118 297 A1.

[0006] During braking, the brake pad is typically pressed either towards the locking bolt or towards a stop molded at the other end of the guide channel, depending on the direction of travel, caused by the friction between the brake disc and the brake pad.

[0007] When installing the brake pads into the dovetail guide of the pad holder, it is important to insert them in the correct orientation. The friction surfaces of the brake pads typically have a convex and a concave edge to maximize contact with the brake disc's annular braking surface. Incorrect insertion of the brake pads results in part of the friction surface being outside the contact area of ​​the brake disc, leading to reduced braking performance.

[0008] To prevent incorrect insertion of the brake pads, a control stop is molded onto the pad holder of the brake pad holder known from JP 2022 - 178 525 A. However, there is a risk that this control stop can be partially destroyed by the brake disc if the brake pads wear down significantly. This can lead to incorrect pad installation if the control stop is damaged, especially if at least partially worn away, due to its reduced height.

[0009] The object of the present invention is to further develop a pad holder and a brake pad holder in such a way that incorrect mounting of the brake pads on the pad holder is prevented by simple means if the brake pads are misaligned.

[0010] The problem is solved by a pad holder for a brake pad holder of a rail vehicle with the features of claim 1 and by a brake pad holder with the features of claim 6.

[0011] The pad holder according to the invention for a brake pad holder of a rail vehicle has a pressure plate with a guide channel extending in the longitudinal direction of the pad holder, in which a brake pad can be slidably and positively locked perpendicular to the normal of the pressure plate.

[0012] The pad holder also features a locking bolt mounted on the pressure plate for locking the brake pad in the longitudinal direction of the pad holder.

[0013] The locking bolt is positioned in the guide channel in a locking position that secures the brake pad in a functional position. In a release position, the locking bolt is removed from the guide channel.

[0014] The locking bolt has a locking piece that, in its release position, projects beyond a side edge of the pressure plate on its underside, and in the locking position of the locking bolt does not project beyond the side edge of the pressure plate on its underside.

[0015] With such a locking piece, incorrect mounting of the brake pad on the pad holder is reliably prevented mechanically.

[0016] Advantageous embodiments of the invention are the subject of the dependent claims.

[0017] According to an advantageous embodiment, the locking piece is designed as a locking lug molded onto the locking bolt.

[0018] Such a locking lug reliably prevents the brake pad from being pushed forward into the functional position if the brake pad is incorrectly aligned by striking the convexly shaped edge of the friction surface of the brake pad.

[0019] According to an advantageous embodiment, in the release position of the locking bolt, the locking piece protrudes by a projection of between 2mm and 10mm beyond the underside of the pressure plate and at a distance of 1mm to 6mm laterally from the side edge of the pressure plate.

[0020] The slight distance of the locking piece from the side edge of the pressure plate reliably prevents the forward movement of a brake pad that is to be inserted in the correct orientation.

[0021] The overhang of 2mm to 10mm beyond the underside of the pressure plate ensures that the locking piece extends far enough under the pressure plate to effectively prevent a misaligned brake pad from being pushed forward.

[0022] The locking bolt is preferably pivotably mounted on a rotary bearing of the lining holder via a bearing bolt received in a bearing receptacle.

[0023] This ensures that the brake pad can be easily locked in its functional position, while at the same time the locking piece can be easily moved into the locking position by pivoting it into the release position.

[0024] According to a further advantageous embodiment, the pivoting movement of the locking bolt is limited by a bracket received in a bracket receptacle between the locking position and the release position, wherein the bracket is pivotably mounted on a second rotary bearing of the lining holder.

[0025] Limiting the pivoting movement of the locking bolt by the bracket enables a clearly defined locking position as well as a clearly defined release position of the locking bolt.

[0026] The brake pad holder according to the invention for a rail vehicle has a pad holder and a brake pad held in place by the pad holder, wherein the pad holder is designed as described above.

[0027] In an advantageous further development, the brake pad has a friction lining and a guide rib arranged on a surface of the friction lining facing the pressure plate for positive locking of the brake pad in the guide channel of the pad holder.

[0028] The maximum projection of a convexly shaped lateral edge of the friction lining from a lateral edge of the guide bar perpendicular to the longitudinal extent of the guide bar is greater than the distance of the locking piece in the release position of the locking bolt from the lateral edge of the guide bar.

[0029] Preferred embodiments are explained in more detail below with reference to the accompanying drawings. They show:

[0030] They show: Fig. 1 A schematic isometric view of a brake pad holder with the brake pad inserted a portion into the pad holder and the locking bolt positioned in the release position, Fig. 2 A front view of the brake pad holder with the brake pad fully inserted into the pad holder and the locking bolt in the locked position, Fig. 3 one of the Fig. 2. Corresponding illustration with locking bolt in the release position and correctly aligned brake pad, Fig. 4 A view from below of the brake pad holder with the brake pad correctly aligned and mounted on the pad holder. Fig. 5 a side view of a single representation of the locking bolt, Fig. 6 one of the Fig. 1. Corresponding illustration of a brake pad holder with a misaligned brake pad in the maximum possible insertion position of the misaligned brake pad on the pad holder and Fig. 7 a front view of the brake pad holder according to Fig. 6 to illustrate the blockage of the brake pad in the in Fig. Position 6 shown through the locking piece.

[0031] In the following figure descriptions, terms such as top, bottom, left, right, front, back, etc., refer exclusively to the exemplary representation and position of the pad holder, brake pad holder, pressure plate, locking bolt, locking piece, and the like as chosen in the respective figures. These terms are not to be understood as restrictive; that is, these references may change due to different working positions, mirror-symmetrical design, or similar factors.

[0032] In Fig. Reference numeral 1 designates a variant embodiment of a brake pad holder according to the invention for a rail vehicle. The brake pad holder 1 comprises a pad holder 2 and a brake pad 3 that can be attached to the pad holder 2.

[0033] The brake pad 3 has a friction lining 31 and a guide rib 32, which is arranged, in particular formed, on a side of the friction lining 31 facing the pad holder 2.

[0034] The pad holder 2 has a pressure plate 21 with a guide channel 23 extending longitudinally along the pad holder 2. The guide rib 32 of the brake pad 3 is slidably positioned in this guide channel 23 and can be positively locked in place perpendicular to the normal of the pressure plate 21.

[0035] The guide web 32 and the guide channel 23 are preferably shaped in the form of a dovetail guide, so that the brake pad 3 can be inserted into the guide channel 23 in the longitudinal direction of the guide channel 23 with the guide web 32 and is positively fixed by the dovetail guide perpendicular to the normal of the pressure plate 21.

[0036] To fix the brake pad 3 in the direction of the longitudinal axis of the guide channel 23, the guide channel 23 ends at one end with a stop against which a corresponding end face of the guide rib 32 of the brake pad 3 can be pressed.

[0037] In the area of ​​the other, in Fig. At the end of the guide channel 23 shown in 2, where the brake pad 3 can be inserted into the guide channel 23, a locking bolt 4 is arranged which is pivotably mounted on the pressure plate 21 to lock the brake pad 3 in the longitudinal direction of the pad holder 2.

[0038] The pad holder 2 also has brake lever bearing points 22 arranged, in particular integrally formed, on its side of the pressure plate 21 facing away from the guide channel 23, which serve for connection to a brake lever (not shown).

[0039] The locking bolt 4, as shown in particular in the detailed illustration in Fig. Figure 5 shows a bearing receptacle 45 in which a bearing bolt 26 is received, which is further received in a rotary bearing 25 of the lining holder 2 and thus pivotably supports the locking bolt 4 on the lining holder 2.

[0040] Furthermore, the locking bolt 4 has a locking bar 41 which, in the locked position of the locking bolt 4, as shown in Fig. 2 is shown, protruding into the guide channel 23. In the release position, as exemplified in the Fig. 1, Fig. 3 and Fig. 6 and Fig. As shown in Figure 7, the locking strip 41 is removed from the guide channel 23, thus enabling the brake pad 3 to be inserted or pushed out of the pad holder 2.

[0041] What's next in Fig. As shown in Figures 1 to 3 and 5 to 7, the locking bolt 4 has a locking piece 42 at one end near the bearing receptacle 45 in the illustrated embodiment.

[0042] In the preferred embodiment shown here, the locking piece 42 is designed as a locking lug integrally formed on the locking bolt 4. This locking piece 42 is in the release position of the locking bolt 4, as shown in the Fig. 1, Fig. 3, Fig. 6 and Fig. 7 shows, over a bottom surface 28 outside a side edge 27 of the pressure plate 21.

[0043] In the locked position of the locking bolt 4, shown in Fig. 2, the locking bolt 4 does not protrude beyond the underside 28 outside the side edge 27 of the pressure plate 21, but is located laterally above the underside 28 of the pressure plate 21 and thus prevents possible damage to the brake disc.

[0044] A in Fig. The overhang dimension b of the locking piece 42 shown in the release position of the locking bolt 4 beyond the underside 28 of the pressure plate 21 is preferably between 2mm and 10mm.

[0045] Furthermore, the distance a between the inner side of the locking piece 42 near the pressure plate 21 and the pressure plate 21 is preferably between 1 mm and 6 mm.

[0046] The overhang dimension b and the distance a thus enable, on the one hand, a correctly aligned brake pad 3 to be inserted into the guide channel 23 of the pad holder 2 without any problems.

[0047] Secondly, the locking piece 42, in the release position of the locking bolt 4, which the locking bolt 4 must always assume for mounting a brake pad on the pad holder 2, prevents the insertion of a brake pad 3 rotated 180° relative to its correct orientation, as is the case in the Fig. 6 and Fig. As shown in Figure 7, this is prevented. Here, the brake pad 3 can only be inserted a partial distance into the pad holder 2 until a portion of a convexly shaped side edge 33 of the friction lining 31 projects outwards perpendicular to the direction of movement to such an extent that the side edge 33 abuts the locking piece 42. Further insertion of the brake pad 3 into the functional position is effectively prevented by the locking action of the locking piece 42 of the locking bolt 4.

[0048] A maximum projection c of a convexly shaped lateral edge 33 of the friction lining 31 from a lateral edge of the guide rib 32 perpendicular to the longitudinal extent of the guide rib 32 is, as in Fig. 6 shown to represent an amount d, shown in Fig. 7, greater than the distance of the locking piece 42 in the release position of the locking bolt 4 from the lateral edge of the guide web 32.

[0049] In contrast, the maximum projection of the friction lining 31 on the concave side of the friction lining 31 is less than the distance of the locking piece 42 in the release position of the locking bolt 4 from the lateral edge of the guide rib 32, so that with correct alignment of the brake lining 3 for mounting on the lining holder 2, as in Fig. As shown in 3, it can easily be pushed past the locking piece 42.

[0050] The pivoting movement of the locking bolt 4 is, as a comparison of the Fig. 1 and Fig.Figure 2 shows that the locking position and the release position are limited by a bracket 5 which is held in a bracket receptacle 44.

[0051] The bracket 5 is pivotably mounted on a second pivot bearing 24 of the pad holder 2. REFERENCE MARK LIST 1 brake pad holder 2 coating holders 21 Pressure plate 22 Brake lever bearing point 23 Guide channel 24 warehouses 25 swivel bearings 26 bearing bolts 27 side margin 28 Underside 3 brake pads 31 friction lining 32 Guide bridge 33 side margin 4 locking bolts 41 Locking strip 42 Locking piece 43 hooks 44 Ironing board 45 Bearing intake 5 hangers a distance from side edge to locking piece b Overhang dimension Locking piece c maximum overhang d Amount of the overhang to the blocking piece

Claims

Brake pad holder (2) for a brake pad holder (1) of a rail vehicle, comprising a pressure plate (21) with a guide channel (23) extending in the longitudinal direction of the brake pad holder (2), in which a brake pad (3) can be slidably and positively locked perpendicular to the normal of the pressure plate (21), a locking bolt (4) movably mounted on the pressure plate (21) for locking the brake pad (3) in the longitudinal direction of the brake pad holder (2), which projects into the guide channel (23) in a locking position fixing the brake pad (3) in its functional position and is removed from the guide channel (23) in a release position, characterized in thatthat the locking bolt (4) has a locking piece (42) which, in its release position, projects beyond a bottom surface (28) outside a side edge (27) of the pressure plate (21) and, in the locking position of the locking bolt (4), does not project beyond the bottom surface (28) outside the side edge (27) of the pressure plate (21). Pad holder (2) according to claim 1, characterized in that the locking piece (42) is designed as a locking lug formed on the locking bolt (4). Pad holder (2) according to claim 1 or 2, characterized in that the locking piece (42) in the release position of the locking bolt (4) projects by a projection dimension (b) of between 2mm and 10mm beyond the underside (28) of the pressure plate (21) and at a distance (a) of 1mm to 6mm laterally from the side edge (27) of the pressure plate (21). Pad holder (2) according to one of the preceding claims, characterized in that the locking bolt (4) is pivotably mounted on a rotary bearing (25) of the pad holder (2) via a bearing bolt (26) received in a bearing receptacle (45). Pad holder (2) according to one of the preceding claims, characterized in that the pivoting movement of the locking bolt (4) is limited by a bracket (5) received in a bracket receptacle (44) between the locking position and the release position, wherein the bracket (5) is pivotably mounted on a second pivot bearing (24) of the pad holder (2). Brake pad holder (1) for a rail vehicle, comprising a pad holder (2), a brake pad (3) held locked to the pad holder (2), characterized in that the pad holder (2) is designed according to one of the preceding claims 1 to 5. Brake pad holder (1) according to one of the preceding claims, characterized in that the brake pad (3) has a friction lining (31) and a guide rib (32) arranged on a surface of the friction lining (31) facing the pressure plate (21) for positive locking of the brake pad (3) in the guide channel (23) of the pad holder (2), wherein a maximum projection (c) of a convexly shaped lateral edge (33) of the friction lining (31) from a lateral edge of the guide rib (32) perpendicular to the longitudinal extent of the guide rib (32) is greater than the distance of the locking piece (42) in the release position of the locking bolt (4) from the lateral edge of the guide rib (32).

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