A friction brake for a vehicle power shift transmission is disclosed. The friction brake includes a load gear that is rotatably driveable about a centre longitudinal. A friction braking device is provided for decelerating and/or fixing the load gear. An actuating device for actuating the friction braking device, the actuating device includes an moveable spreading piston. The moveable spreading piston while performing a spread along the centre longitudinal axis automatically materialising as a function of a load torque provided on the load gear, provides a braking force for actuating the friction braking device.

A wheel hub has an axle device and a braking device. The axle device has an axle and a hub body. The hub body is mounted rotatably around the axle. The braking device is connected to the axle device and has a driving sleeve, a braking sleeve, a pressing jacket, and a fixing member. The fixing member is mounted in the hub body, is mounted around an end of the axle, and has a first end and an elongated engaging protrusion. The elongated engaging protrusion is formed on and protrudes from the first end of the fixing member.

A wheel hub has an axle device and a braking device. The axle device has an axle and a hub body. The hub body is mounted rotatably around the axle. The braking device is connected to the axle device and has a driving sleeve, a braking sleeve, a pressing jacket, and a fixing member. The fixing member is mounted in the hub body, is mounted around an end of the axle, and has a first end and an elongated engaging protrusion. The elongated engaging protrusion is formed on and protrudes from the first end of the fixing member.

A wheel hub has an axle device and a braking device. The axle device has an axle and a hub body. The hub body is mounted rotatably around the axle. The braking device is connected to the axle device and has a driving sleeve, a braking sleeve, a pressing jacket, and a fixing member. The fixing member is mounted in the hub body, is mounted around an end of the axle, and has a first end and an elongated engaging protrusion. The elongated engaging protrusion is formed on and protrudes from the first end of the fixing member.