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DE-102025105840-B3 - Brake pad holder for a rail vehicle

DE102025105840B3DE 102025105840 B3DE102025105840 B3DE 102025105840B3DE-102025105840-B3

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 longitudinally in 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) longitudinally in 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) projects beyond a side edge (27) of the pressure plate (21) in its release position and does not project beyond the side edge (28) in the locking position of the locking bolt (4). (27) has a locking piece (42) projecting from the pressure plate (21). Furthermore, a brake pad holder (1) with a pad holder (2) is described.

Inventors

  • Ferenc Müllek

Assignees

  • Knorr-Bremse Systeme für Schienenfahrzeuge GmbH

Dates

Publication Date
20260513
Application Date
20250217

Claims (7)

  1. A brake pad holder (2) for a brake pad bracket (1) of a rail vehicle, comprising a pressure plate (21) with a guide channel (23) extending longitudinally in 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) longitudinally in the brake pad holder (2), which in a locking position fixing the brake pad (3) in its functional position projects into the guide channel (23) and in a release position is removed from the guide channel (23), characterized in that the locking bolt (4) has a projection in its release position over an underside (28) outside a side edge (27) of the pressure plate (21) and in its locking position does not project over the underside (28) outside the has a protruding locking piece (42) on the side edge (27) of the pressure plate (21).
  2. Lining holder (2) according Claim 1 , characterized in that the locking piece (42) is designed as a locking lug molded onto the locking bolt (4).
  3. Lining holder (2) according 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).
  4. 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).
  5. 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).
  6. Brake pad holder (1) for a rail vehicle, comprising a pad holder (2), a brake pad (3) held in place on the pad holder (2), characterized in that the pad holder (2) is designed according to one of the above Claims 1 until 5 is trained.
  7. 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).

Description

The present invention relates to a pad holder for a brake pad holder of a rail vehicle according to the preamble of claim 1. The invention further relates to a brake pad holder for a rail vehicle. 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. 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. Such a generic brake pad holder with a generic pad holder is, for example, made from the DE 10 2019 118 297 A1 known. 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. 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. To prevent incorrect insertion of the brake pads as much as possible, when using a brake pad from the JP 2022 - 178 525 A The familiar brake pad holder has a built-in control stop. However, there is a risk that this control stop can be partially destroyed by the brake disc if the brake pad wears heavily. 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. 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. 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. 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. 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. 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. 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. With such a locking piece, incorrect mounting of the brake pad on the pad holder is reliably prevented mechanically. Advantageous embodiments of the invention are the subject of the dependent claims. According to an advantageous embodiment, the locking piece is designed as a locking lug molded onto the locking bolt. 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. 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. 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. 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. The locking bolt is preferably pivotably mounted on a rotary bearing of the lining holder via a bearing bolt received in a bearing receptacle. This ensures that the brake pad can be easily locked in its functional position, while at the same time allowing the locking piece to be easily moved into the locking position by pivoting it into the release position. According to a further advantageous embodiment, the pivoting mov