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DE-102025112927-A1 - Axle drive device for a motor vehicle, in particular for a motor car

DE102025112927A1DE 102025112927 A1DE102025112927 A1DE 102025112927A1DE-102025112927-A1

Abstract

The invention relates to an axle drive device (10) for a motor vehicle, with at least one integrated friction brake device (14) which is arranged in an interior space (68) of an intermediate cover (62) closing a drive compartment (70), and with a final cover (74) which closes the interior space (68) of the intermediate cover (62), wherein, in the installed position of the axle drive device (10), a pressure relief valve device (88) is provided in an upper area (B) of the intermediate cover (62) or the final cover (74) in the direction of the vehicle height, and wherein a ventilation function is additionally provided for the interior space (68).

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 (6)

  1. Axle drive device (10) for a motor vehicle, comprising at least one integrated friction brake device (14) arranged in an interior space (68) of an intermediate cover (62) closing a drive compartment (70), and a final cover (74) closing the interior space (68) of the intermediate cover (62), wherein: - in the installed position of the axle drive device (10), a pressure relief valve device (88) is provided in an upper area (B) of the intermediate cover (62) or the final cover (74) in the upward direction of the vehicle; and - a ventilation function is additionally provided for the interior space (68).
  2. Axle drive unit (10) according Claim 1 , characterized in that an output shaft (24) is provided.
  3. Axle drive unit (10) according Claim 2 , characterized in that the intermediate cover (62) is arranged coaxially to the output shaft (24) and has a first shaft seal (102) by which the drive chamber (70) of the axle drive device (10) is sealed against the interior (68).
  4. Axle drive unit (10) according Claim 2 or 3 , characterized in that the end cover (74) is arranged coaxially to the output shaft (24) and has a second shaft seal (100) by means of which at least a partial area of the interior (68) is sealed against an external environment (72).
  5. Axle drive device (10) according to one of the preceding claims, characterized in that the ventilation function is integrated into the pressure relief valve (88).
  6. Axle drive device (10) according to one of the preceding claims, characterized in that the overpressure valve device (88) has a further weighing surface and a further spring for realizing the ventilation function.

Description

The invention relates to an axle drive device for a motor vehicle, in particular for a motor car, according to the preamble of claim 1. The DE 10 2020 216 358 A1 An electric drive device for a motor vehicle is known. The object of the present invention is to create a particularly advantageous axle drive device for a motor vehicle, in particular for a motor car. This problem is solved by an axle drive 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 an axle drive device for a motor vehicle, also referred to simply as a vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state, has the axle drive device and can be driven by means of the axle drive device. The axle drive device has at least one integrated friction brake device, which is also referred to simply as a brake device. The friction brake device is arranged in an interior space of an intermediate cover that closes off a drive compartment of the axle drive device. The axle drive device has, for example, a housing comprising a first housing part and a second housing part. The first housing part and the second housing part are, for example, designed separately from one another and thus indirectly, in particular directly, connected to each other. For example, the second housing part is the intermediate cover, also referred to as a side cover. In particular, the drive compartment is bounded, in particular directly, by the first housing part, in particular by an inner circumferential surface of the first housing part. The interior space of the intermediate cover, also referred to as the first interior space, is bounded by the intermediate cover, in particular by an inner circumferential surface of the intermediate cover, and especially directly bounded. Thus, the friction braking device is arranged radially within the intermediate cover and axially overlapping it. A final cover is also provided, which is, for example, a third housing part of the housing. The third housing part is designed separately from the first housing part and separately from the second housing part, and is connected to both, at least indirectly. The final cover closes the interior space of the intermediate cover. Considering only the first housing part, the first housing part has, for example, a first through-opening that opens at one end into the drive chamber and at the other end into the surrounding environment. By means of the intermediate cover, the first through-opening, and thus the drive chamber, is at least partially closed, particularly towards the surrounding environment. Looking at the intermediate cover alone, it has a second opening that leads at one end into the interior of the intermediate cover and at the other into the aforementioned surroundings. The end cover at least partially closes this second opening and thus the interior of the intermediate cover, particularly towards the surroundings. For example, an output shaft, also referred to as a shaft, is provided, which is rotatable about its axis of rotation relative to the housing, and thus relative to the end cover and the intermediate cover. This means that at least part of the output shaft is rotatable about its axis of rotation relative to the end cover, the intermediate cover, and the first housing part. By driving the output shaft, it can be rotated about its axis of rotation relative to the housing. For example, the axle drive unit has a drive motor by means of which the output shaft can be driven and thus rotated about its axis of rotation relative to the housing. The drive motor is, for example, an electric motor. For example, the drive motor is located, at least partially, in the drive compartment. Alternatively or additionally, a gearbox is located in the drive compartment, via which, for example, the output shaft can be driven, particularly by the drive motor. For example, in its fully manufactured state, the motor vehicle has at least one wheel, also simply referred to as a wheel, which is a ground contact element of the motor vehicle. The motor vehicle can be supported or is supported downwards against a ground via this ground contact element. For example, the output shaft is coupled or can be coupled to the vehicle wheel in a torque-transmitting manner, so that, for example, the vehicle wheel can be driven by driving the output shaft. The friction brake device is integrated into the axle drive device, in particular by the fact that the friction brake device is arranged in the interior of the intermediate cover. The vehicle wheel is supported by a The wheel axis is rotatable relative to the housing. For example, by means of a friction brake device, which is designed, for instance, as a disc brake, the output shaft can be braked, i.e., slowed down, with respect to rotations occurring ab