Brake device and electrically operatable axle drivetrain of a motor vehicle

A brake device for an electrically operatable axle drivetrain of a motor vehicle, the brake device comprising:

• a hydraulic disengaging system comprising a central disengaging element configured to actuate a friction device such that the friction device can be converted into a braking and non-braking operating state, wherein the central disengaging element includes a central disengaging element housing comprising an annular central disengaging element piston chamber in which a central disengaging element piston is received in an axially movable manner by a hydraulic liquid supplied to the central disengaging element piston chamber, wherein the central disengaging element includes at least one central disengaging element piston seal configured to seal off the central disengaging element piston from the central disengaging element piston chamber,
• wherein the central disengaging element and the friction device are received in a brake housing,
• wherein the brake housing comprises a first pot-shaped housing part and a second lid-shaped housing part at least partly covering the first pot-shaped housing part,
• wherein the first pot-shaped housing part forms the central disengaging element housing of the central disengaging element,
• wherein the second lid-shaped second housing part is formed by a motor housing of an electric machine;
• and
• a shaft, wherein the shaft passes through the brake housing and is connected to the friction device of the brake device in a torque-transmitting manner, wherein the shaft is mounted relative to the first pot-shaped housing part by a first rolling bearing and a first bearing seat of the first rolling bearing is formed on the first pot-shaped housing part.

An electrically operatable axle drivetrain of a motor vehicle comprising:

• an electric machine including a stator and a rotor for driving at least one vehicle wheel of the motor vehicle, and
• a brake device coupled to the vehicle wheel of the motor vehicle such that actuation of the brake device brakes the vehicle wheel,
• wherein the brake device comprises:
• a hydraulic disengaging system comprising a central disengaging element configured to actuate a friction device such that the friction device can be converted into a braking and non-braking operating state, wherein the central disengaging element includes a central disengaging element housing comprising an annular central disengaging element piston chamber in which a central disengaging element piston is received in an axially movable manner by a hydraulic liquid supplied to the central disengaging element piston chamber, wherein the central disengaging element includes at least one central disengaging element piston seal configured to seal off the central disengaging element piston from the central disengaging element piston chamber, wherein the central disengaging element and the friction device are received in a brake housing, wherein the brake housing comprises a first pot-shaped housing part and a second lid-shaped housing part at least partly covering the first pot-shaped housing part, wherein the first pot-shaped housing part forms the central disengaging element housing of the central disengaging element, wherein the second lid-shaped second housing part is formed by a motor housing of an electric machine;
• and
• a shaft, wherein the shaft passes through the brake housing and is connected to the friction device of the brake device in a torque-transmitting manner, wherein the shaft is mounted relative to the first pot-shaped housing part by a first rolling bearing and a first bearing seat of the first rolling bearing is formed on the first pot-shaped housing part.