DE-102025112935-A1 - Braking system for a motor vehicle and motor vehicle

Abstract

The invention relates to a braking device (14) for a motor vehicle, comprising a friction disc (20) which is arranged axially between a first counter-rotating disc (42) and a second counter-rotating disc (16) of the braking device (14), wherein the friction disc (20) has internal teeth which engage in a counter-tooth (46) provided on a connecting element (90) which is rotationally fixed to an output shaft (24) and is designed as external teeth; an annular cup-shaped return spring (85) is arranged on an inner circumferential region of the connecting element (90), which partially surrounds the connecting element (90) and is connected to the connecting element (90) via an interference fit and is in operative contact with the friction disc (20); the connecting element (90) has a machined surface (FL) on which the return spring (85) bears in an interference fit; and an axial extent of the machined area (FL) is greater than an overlap length over which the return spring (85) overlaps the connecting element (90).

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. A braking device (14) for a motor vehicle, comprising a friction disc (20) arranged axially between a first counter-rotating disc (42) and a second counter-rotating disc (16) of the braking device (14), wherein: - the friction disc (20) has internal teeth which engage with external teeth (46) provided on a connecting element (90) which is non-rotatably connected to an output shaft (24); - an annular cup-shaped return spring (85) is arranged on an inner circumferential region of the connecting element (90), which partially surrounds the connecting element (90) and is connected to the connecting element (90) via an interference fit and is in operative contact with the friction disc (20); - the connecting element (90) has a machined surface (FL) against which the return spring (85) bears in an interference fit; and - an axial extent of the machined area (FL) is greater than an overlap length over which the return spring (85) overlaps the connecting element (90).
2. Braking device (14) after Claim 1 , characterized in that: - a housing device (62, 74) is provided in which the friction disc (20) and the counter-running discs (16, 42) are arranged; - the first counter-running disc (42) is connected to the housing device (62, 74) in a rotationally fixed and axially fixed manner; and - the second counter-running disc (16) is connected to the housing device (62, 74) in a rotationally fixed manner and is axially displaceable relative to the housing device (62, 74), relative to the friction disc (20) and relative to the first counter-running disc (42).
3. Braking device (14) after Claim 1 or 2 , characterized in that the return spring (85) extends radially outside the external toothing and in an axial direction along a partial area (L1) of the connecting element (90).
4. Motor vehicle, with at least one braking device (14) according to one of the preceding claims.

Description

The invention relates to a braking device for a motor vehicle. The invention also relates to a motor vehicle with at least one such braking device. The DE 10 2019 118 503 A1 A brake device for a wheel hub drive arrangement is known to include a housing section for arranging the brake device on the wheel hub drive arrangement. The object of the present invention is to provide a braking device for a motor vehicle and a motor vehicle with such a braking device, in such a way that a particularly advantageous resetting of the braking device can be realized. This problem is solved by a braking device with the features of claim 1 and by a motor vehicle with the features of claim 4. Advantageous embodiments with expedient further developments of the invention are specified in the remaining claims. A first aspect of the invention relates to a braking device, also simply referred to as a brake or friction brake, for a motor vehicle, also simply referred to as a vehicle. This means that the motor vehicle, preferably designed as a car, in particular a passenger car, has the braking device in its fully manufactured state. In particular, the braking device is designed as a friction disc brake device, which is also simply referred to as a disc brake device or disc brake. As will be explained in more detail below, the braking device is a friction brake device, i.e., a friction brake. For example, the motor vehicle, in its fully manufactured state, has at least one vehicle wheel, also simply referred to as a wheel, which is a ground contact element. The motor vehicle can be supported or is supported downwards against the ground by means of the ground contact element. If the motor vehicle is driven along the ground while it is supported downwards against the ground by means of the ground contact element in its vertical direction, the ground contact element rolls, in particular directly, along the ground. The vehicle wheel is rotatable about a wheel axis relative to a reference element of the motor vehicle, in particular the braking system, such that the vehicle wheel rotates about the wheel axis relative to the reference element, especially when it rolls, particularly directly, on the ground. For example, the vehicle wheel can be braked, i.e., slowed down, with respect to a rotation about the wheel axis and relative to the reference element by means of the braking system, thereby braking the motor vehicle as a whole. In particular, the braking system is or constitutes a service brake of the motor vehicle. The braking device has a friction disc which is arranged axially between a first counter-running disc and a second counter-running disc of the braking device. It is conceivable that the braking system includes a housing in which, for example, the friction disc and the counter-rotating disc can each be at least partially arranged. This housing is also simply referred to as the housing. Thus, the vehicle wheel can rotate around the wheel axis relative to the housing. For example, the friction disc is rotatable about an axis of rotation relative to the counter-rotating discs and preferably also relative to the housing assembly. For example, the friction disc is torque-transmitting, and in particular rotationally fixed, coupled or coupling to the vehicle wheel, whereby, for example, when the vehicle wheel rotates about the wheel's axis of rotation and relative to the reference element, the friction disc can rotate with the vehicle wheel and thus about the axis of rotation relative to the counter-rotating discs and, in particular, relative to the housing assembly. By actuating the braking device, in particular hydraulically, the friction disc can, for example, be brought into, in particular, direct, mutual frictional contact with the counter-rotating discs, whereby the friction disc can be braked, i.e., slowed down and thus at least decelerated, during a rotation about the axis of rotation and relative to the counter-rotating discs. This means, for example, that because the friction disc is torque-transmitting, and in particular rotationally fixed, and can be coupled to the vehicle wheel, the vehicle wheel can be braked for rotation about the wheel axis and relative to the reference element, i.e., it can be braked, thus making the vehicle as a whole brakeable, i.e., capable of being braked. By actuating the braking device, particularly hydraulically, braking can therefore be effected, by which the friction disc can be braked or is braked with respect to its rotation about the axis of rotation and relative to the counter-rotating discs and preferably relative to the housing assembly, thereby, for example, The vehicle wheel can be braked with respect to its rotation about the wheel axis and relative to the reference element, and in particular relative to the housing. This allows, for example, the overall braking of the vehicle. For example, the friction disc has a first friction surface and a second friction surface. The first cou