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DE-102025112942-A1 - Friction brake for a motor vehicle

DE102025112942A1DE 102025112942 A1DE102025112942 A1DE 102025112942A1DE-102025112942-A1

Abstract

The invention relates to a friction brake device (14) for a motor vehicle, with a friction pad carrier disc (20) which is connected at least indirectly to a drive shaft (24) in a torque-transmitting manner, by means of which a vehicle wheel of the motor vehicle can be driven, wherein the friction pad carrier disc (20) has a profile (100) on its outer circumference (98) into which a locking bolt (102) of a parking lock module (105) can be inserted.

Inventors

  • Alexander von Gaisberg-Helfenberg
  • Jochen Haefner
  • Thomas Stolk

Assignees

  • Mercedes-Benz Group AG

Dates

Publication Date
20260513
Application Date
20250402
Priority Date
20241108

Claims (5)

  1. Friction brake device (14) for a motor vehicle, comprising a friction lining carrier disc (20) which is connected at least indirectly to a drive shaft (24) by means of which a vehicle wheel of the motor vehicle can be driven, wherein the friction lining carrier disc (20) has a profile (100) on its outer circumference (98) into which a locking bolt (102) of a parking lock module (105) can be inserted.
  2. Friction brake device (14) according to Claim 1 , characterized in that the friction lining carrier disc (20) has an inner rim (106) from which radial webs (108) extend from radially inside to radially outside over a circumference in an even distribution, between which friction lining segments (90) are arranged.
  3. Friction brake device (14) according to Claim 1 or 2 , characterized in that the friction brake device (14) has a brake disc (16, 42) which has a plug-in toothing on its outer circumference which engages in a corresponding plug-in toothing (48) arranged on an inner circumferential side of a cover (62, 74) of a housing (62, 84) of the friction brake device (14), whereby the brake disc (16, 42) is connected to the cover (62, 74) in a rotationally fixed manner.
  4. Friction brake device (14) according to one of the preceding claims, characterized in that the friction pad carrier disc (20) has a splined connection (96) on its inner circumference (94) by means of which the friction pad carrier disc (20) is connected in a rotationally fixed manner to a joint part (38) of a tripod joint (40) of the drive shaft (24), whereby the friction pad carrier disc (20) is connected to the drive shaft (24) in a torque-transmitting manner.
  5. Friction brake device (14) according to one of the preceding claims, characterized in that at least the friction pad carrier disc (20) is enclosed by a housing (62, 74) through which the locking bolt (102) is passed.

Description

The invention relates to a friction brake for a motor vehicle. The DE 10 2006 046 712 A1 A parking lock device for a motor vehicle is to be taken as known. The object of the present invention is to create a particularly advantageous friction braking device for a motor vehicle. This problem is solved by a friction braking device with the features of claim 1. Advantageous embodiments with expedient further developments of the invention are specified in the remaining claims. The invention relates to a friction brake device, also referred to simply as a brake, braking system, or friction brake, for a motor vehicle, also referred to simply as a vehicle. Most preferably, the friction brake device, which is also referred to simply as a braking system, is or forms a service brake of the motor vehicle. In particular, the friction brake device is integrated into a housing assembly of the motor vehicle, especially an axle drive assembly of the motor vehicle. When the braking system is mentioned before and below, unless otherwise specified, this refers to the friction brake device according to the invention. The friction brake assembly comprises a friction pad carrier disc, also simply referred to as a pad carrier disc, friction disc, or carrier disc. The friction pad carrier disc is connected, at least indirectly, and in particular directly, to a drive shaft, also simply referred to as a shaft or side shaft, in particular the axle drive assembly, thereby transmitting torque. A vehicle wheel of the motor vehicle can be driven by means of the drive shaft. For this purpose, the axle drive assembly, for example, comprises a drive motor, in particular an electric motor, by means of which the drive shaft and, via the drive shaft, the vehicle wheel can be driven. The friction lining carrier disc has a profile on its outer circumference, designed in particular as a toothed section, into which a locking bolt, also referred to as a locking pin, of a parking lock module, especially of an axle drive unit, can be inserted. This allows the locking bolt to engage positively with the friction lining carrier disc and, via the disc, with the drive shaft, thereby securing the drive shaft against unwanted rotation relative to the housing. This prevents, for example, the vehicle from rolling away when parked on an incline or decline. In an advantageous embodiment of the invention, the friction lining carrier disc has an inner rim from which radial webs extend evenly distributed from radially inside to radially outside over a circumference, between which friction lining segments are arranged. In an advantageous embodiment of the invention, the friction brake device has a brake disc which has a plug-in toothing on its outer circumference which engages in a corresponding plug-in toothing arranged on an inner circumferential side of a cover of a housing of the friction brake device, whereby the brake disc is connected to the cover in a rotationally fixed manner. In an advantageous embodiment of the invention, it is provided that the friction lining carrier disc has a splined connection on its inner circumference, by means of which the friction lining carrier disc is rotationally fixed to a joint part of a tripod joint of the drive shaft, whereby the friction lining carrier disc is connected to the drive shaft in a torque-transmitting manner. In an advantageous embodiment of the invention, it is provided that at least the friction lining carrier disc is enclosed by a housing through which the locking bolt is passed. Further advantages, features, and details of the invention will become apparent from the following description of a preferred embodiment and from the drawing. The features and combinations of features mentioned above in the description, as well as those mentioned below in the figure description and/or shown in the figures alone, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention. The drawing shows in: 1 a partial schematic sectional view of an electric axle drive unit of a motor vehicle, wherein a friction disc brake unit is integrated into the electric axle drive unit; and 2 Partially a schematic longitudinal section view of the friction disc brake assembly; 3 a further schematic longitudinal section view of the friction disc brake device; 4 a schematic perspective view of a brake disc element; and 5 A schematic perspective view of a parking lock module of the axle drive unit. In the figures, identical or functionally equivalent elements are provided with the same reference symbols. 1 Figure 1 shows a schematic longitudinal sectional view of an electric axle drive unit 10 of a motor vehicle, which is also referred to simply as the vehicle and can be driven, in particular purely electrically, by means of the electric axle drive unit 10. For example, the electric axle drive unit 10, also referred to as the electric drive module, has a