Vehicle brake for use as e.g. parking brake, has free wheel nut connected to auxiliary piston of blocking installation so that nut rotates around screw when piston is moved in axial direction, where nut has threads in opposite directions

摘要

The brake has an integrated blocking installation with a pressure chamber (9) between a brake piston (2) and an auxiliary piston (4). A spring unit prestresses the piston (4) in the piston`s (2) direction. A screw installation has a free wheel nut (6) connected to the piston (4) so that the nut (6) rotates around a screw when the piston (4) is moved in an axial direction. A locking installation locks or liberates the nut`s movement. The nut has a thread (11), in contact with the screw, in opposite direction to that of a thread (12) in contact with a wear compensating unit (3). An independent claim is also included for a method for mechanical locking of a blocking position of a blocking installation of a vehicle brake.