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DE-102025112944-A1 - Friction disc brake system for a motor vehicle

DE102025112944A1DE 102025112944 A1DE102025112944 A1DE 102025112944A1DE-102025112944-A1

Abstract

The invention relates to a friction disc brake device (28) for a motor vehicle, comprising a lining disc (34) arranged coaxially to at least a part (20) of an output shaft (16) and axially between a first brake disc (30) and a second brake disc (32) of the friction disc brake device (28), wherein an interior space (44) of the friction disc brake device (28) is surrounded by a housing (36) through which the output shaft (16) penetrates. The first brake disc (30) and the second brake disc (32) are rotationally fixed to the housing (36) at their respective outer circumferences. The lining disc (34) is rotationally fixed to the output shaft (16) via a support element (51) and thereby indirectly. The support element (51) has several air passage openings (66) on its circumference, through which a first sub-space (T1) of the interior (44), in whose first sub-space (T1) the first brake disc (30) is arranged, and a second sub-space (T2) of the interior (44), in whose second sub-space (T2) the second brake disc (32) is arranged, are fluidically connected to each other.

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 disc brake device (28) for a motor vehicle, comprising a lining disc (34) arranged coaxially to at least a part (20) of an output shaft (16) and axially between a first brake disc (30) and a second brake disc (32) of the friction disc brake device (28), wherein: - an interior space (44) of the friction disc brake device (28) is surrounded by a housing device (36) through which the output shaft (16) penetrates; - the first brake disc (30) and the second brake disc (32) are rotationally fixed to the housing device (36) at their respective outer circumferences; - the lining disc (34) is rotationally fixed to the output shaft (16) via a support element (51) and thereby indirectly; and - the support element (51) has several air passage openings (66) on its circumference, through which a first sub-space (T1) of the interior (44), in whose first sub-space (T1) the first brake disc (30) is arranged, and a second sub-space (T2) of the interior (44), in whose second sub-space (T2) the second brake disc (32) is arranged, are fluidically connected to each other.
  2. Friction disc brake device (28) according to Claim 1 , characterized in that the brake discs (30, 32) each have at least one air guide channel (L1, L2) which extends from a respective inner circumference to a respective outer circumference of the respective brake disc (30, 32).
  3. Friction disc brake device (28) according to Claim 2 , characterized in that the air guide channels (L1, L2) extend radially from a respective inner circumference to a respective outer circumference of the respective brake disc (30, 32).
  4. Friction disc brake device (28) according to one of the preceding claims, characterized in that the brake discs (30, 32) are connected to the housing device (36) in a rotationally fixed manner at their respective outer circumference via a respective splined connection.

Description

The invention relates to a friction disc brake device for a motor vehicle. The state of the art includes the DE 198 23 025 A1 . The object of the present invention is to create a particularly advantageous friction disc brake device for a motor vehicle. This problem is solved by a friction disc brake 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 disc brake system, also referred to simply as a brake, braking device, friction brake, friction brake assembly, or disc brake system, for a motor vehicle, also referred to simply as a vehicle. In particular, the friction disc brake system is integrated into a housing of the motor vehicle, especially an axle component of the motor vehicle. The axle component is, for example, an axle drive unit, in particular an electric axle drive unit, or an axle transmission, also referred to as a differential or differential gear, or a chassis component such as an axle carrier. When the braking device is mentioned above and below, unless otherwise specified, this refers to the friction disc brake system according to the invention. In particular, the friction disc brake system is or forms a service brake of the motor vehicle. For example, the friction disc brake system is integrated into the axle component by being at least partially arranged in the housing of the axle component and thus integrated into the housing. The braking device (friction disc brake system) has a housing assembly, which can, for example, be part of the housing. The friction disc brake assembly has a coaxially arranged output shaft of the motor vehicle, in particular the axle component, and a friction disc, also referred to as a counter-rotating disc, arranged axially between a first brake disc and a second brake disc of the friction disc brake assembly. In particular, the brake discs and the friction disc are each at least partially arranged within the housing assembly. An interior space of the friction disc brake assembly, also referred to as a receiving space, is surrounded by the housing assembly and thereby, in particular directly, bounded by the housing assembly, especially by an inner circumferential surface of the housing assembly. The housing assembly, in particular the interior space, is penetrated by the output shaft, which is also referred to as a shaft, side shaft, or drive shaft. At least the portion of the output shaft is rotatable about an axis of rotation relative to the housing assembly of the friction disc brake assembly, the axial direction of which coincides with the axis of rotation. When the axial direction is mentioned before and after, unless otherwise specified, this refers to the axial direction of the friction disc brake assembly. The term "axial" refers to the axial direction of the friction disc brake assembly, whose radial direction is perpendicular to the axial direction and thus perpendicular to the axis of rotation. When the radial direction is mentioned before and below, it refers, unless otherwise specified, to the radial direction of the friction disc brake assembly. The term "radial" refers to the radial direction of the friction disc brake assembly, whose circumferential direction extends around the axis of rotation and lies in an imaginary plane that is perpendicular to the axis of rotation and thus perpendicular to the axial direction. The first brake disc and the second brake disc are non-rotatably connected to the housing assembly at their respective outer circumferences, so that the brake pad (also referred to as the pad carrier disc) and at least part of the output shaft are rotatable about the axis of rotation relative to the housing assembly and relative to the brake discs. In particular, part of the output shaft is or forms a shaft section of the output shaft and/or a joint section of the output shaft. The brake pad is indirectly connected to the output shaft, i.e., at least to part of the output shaft, via a carrier element and is rotatable with at least part of the output shaft about the axis of rotation relative to the brake discs and relative to the housing assembly. The carrier element has several air passages on its outer circumference, through which a first and a second compartment of the interior are fluidically connected. The first brake disc is arranged in the first compartment, and the second brake disc is arranged in the second compartment. In particular, the sub-spaces are separated from each other by the supporting element, especially by a wall of the supporting element, so that, for example, the interior space is divided into sub-spaces by the supporting element, especially by the wall of the supporting element. The air passage openings, designed as through-openings, are arranged in the wall, which is penetrated, in particular completely, by the air passage openings. At least when the friction disc brake ass