DE-102025112943-A1 - Friction braking system for a motor vehicle

Abstract

The invention relates to a friction brake device (14) for a motor vehicle, comprising a housing device (62, 74), with at least one friction disc (16) rotationally fixed to the housing device (62, 74), in which a cooling plate (88) is integrated, which has a plurality of annular cooling fins (90) and annular grooves (92) formed by the cooling fins (90) with groove bases (94) in which a plurality of protrusions (96) and depressions (98) are formed, wherein, with respect to a circumference of the cooling plate (88), at least one of the cooling fins (90) has an interruption (100) at at least one location (ST1).

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 (4)

1. Friction brake device (14) for a motor vehicle, comprising a housing device (62, 74), with at least one friction disc (16) rotationally fixed to the housing device (62, 74), in which a cooling plate (88) is integrated, which has a plurality of annular cooling fins (90) and annular grooves (92) formed by the cooling fins (90) with groove bases (94) in which a plurality of protrusions (96) and depressions (98) are formed, wherein, with respect to a circumference of the cooling plate (88), at least one of the cooling fins (90) has an interruption (100) at at least one location (ST1).
2. Friction brake device (14) according to Claim 1 , characterized in that the cooling plate (88) is made of an aluminum alloy.
3. Friction brake device (14) according to Claim 1 or 2 , characterized by a coolant which can be introduced into the annular grooves (92), wherein the coolant is or comprises water.
4. Friction brake device (14) according to one of the preceding claims, characterized in that, with respect to the circumference of the cooling plate (88), the at least one cooling fin (90) has a second interruption (100) at at least a second location (ST2), wherein the locations (ST1, ST2) are spaced apart from each other by 180 degrees with respect to the circumference.

Description

The invention relates to a friction brake device for a motor vehicle. The EP 1 996 828 B1 A liquid-cooled brake disc is known to exist. 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 simply referred to as a brake, braking device, or friction brake, for a motor vehicle, also simply referred to as a vehicle. In particular, the friction brake device is integrated into a housing of the motor vehicle, especially an axle drive unit of the motor vehicle. When the braking device is mentioned before and after, unless otherwise specified, this refers to the friction brake device according to the invention. The braking device comprises a housing assembly, which is, for example, part of the housing. The braking device comprises a friction disc, which is rotationally fixed to the housing assembly. For example, the friction disc is arranged at least partially, and in particular at least predominantly or completely, within the housing assembly. It is conceivable that the friction brake device comprises at least one counter-rotating disc corresponding to the friction disc, which is rotatable, for example, about an axis of rotation relative to the housing assembly and relative to the friction disc. The friction disc is also referred to as the first friction disc. When the friction disc is mentioned before and after, unless otherwise specified, this refers to the first friction disc. For example, the counter-rotating disc is or forms a second friction disc of the braking device. In principle, it would be conceivable that the friction disc is axially movable, i.e., displaceable, relative to the housing and, for example, relative to the counter-rotating disc, in the axial direction of the friction braking device, whose radial direction is perpendicular to the axis of rotation and thus perpendicular to the axial direction of the friction braking device. Alternatively, it is possible that the friction disc is axially fixed to the housing and therefore not displaceable relative to the housing in the axial direction of the friction braking device. For example, the counter-rotating disc is displaceable, i.e., displaceable, relative to the housing and, for example, also relative to the first friction disc, in the axial direction of the friction braking device. The axial direction of the friction braking device coincides with the axis of rotation. When the axial direction is mentioned before and after, it refers, unless otherwise specified, to the axial direction of the friction braking device. When the radial direction is mentioned before and below, this refers, unless otherwise specified, to the radial direction of the friction braking device. "Axial" refers to the axial direction, and "radial" refers to the radial direction. The friction disc has, for example, a first friction surface. The counter-rotating disc has, for example, a second friction surface. For example, the first friction surface and the second friction surface are axially oriented towards each other. By actuating the braking device, particularly hydraulically, the friction disc and/or the counter-rotating disc can be axially displaced relative to the housing assembly in such a way that the friction disc and the counter-rotating disc, and thus the first friction surface and the second friction surface, can be moved axially towards each other, thereby bringing the first friction surface and the second friction surface into mutual, particularly direct, frictional contact, which is also referred to as frictional contact. This allows, for example, the counter-rotating disc to be braked with respect to a rotation about the axis of rotation and relative to the housing assembly and relative to the friction disc, thus at least slowing it down, thereby allowing, for example, the vehicle as a whole to be braked. For example, in its fully manufactured state, a motor vehicle has at least one wheel, which is also referred to as a wheel. This wheel may, for instance, be a ground contact element by which the motor vehicle can be supported or is supported downwards against a ground in the vehicle's vertical direction. It is conceivable that the counter-rotating disc is connected to the vehicle wheel in a torque-transmitting manner, and in particular, in a rotationally fixed manner. The vehicle wheel is rotatable about a wheel axis relative to the housing assembly. Thus, for example, when the vehicle wheel rotates about the wheel axis relative to the housing assembly, the counter-rotating disc can rotate with the vehicle wheel and is therefore rotatable about the axis of rotation relative to the housing assembly and relative to the friction disc. By actuating