HYDRAULIC VEHICLE BRAKE HAVING AN INTEGRATED ELECTROMECHANICALLY ACTUABLE PARKING BRAKE

摘要

A hydraulic vehicle brake with a parking brake device, in particular for motor vehicles, includes a brake housing in which a hydraulic service pressure chamber is delimited by a brake piston, wherein hydraulic pressure fluid can be applied to the hydraulic service pressure chamber for carrying out service brake operations so that the brake piston is actuatable along a longitudinal piston axis in order to achieve a braking effect. The parking brake device acts on the brake piston with an actuating device, which actuates a rolling-element ramp-type gear with an electromechanical actuator. In order to achieve a higher rate of overall efficiency as well as a reduced electric energy consumption, a two-step gear is interposed between the electromechanical actuator ( 7 ) and the actuating device ( 4 ), wherein the first gear step ( 11, 21, 31 ) on the inlet side is connected to an output shaft ( 8 ) of the electromechanical actuator ( 7 ) and the second gear step ( 12, 22, 32 ) on the outlet side is connected to the rolling-element ramp-type gear ( 1, 2, 3 ).