Combined Vehicle Brake With Electromechanically Operable Parking Brake and Gear For Converting A Rotary Movement Into A Translational Movement

A combined vehicle brake, which comprises:

• a hydraulically actuated service brake and an electromechanically actuated parking brake device,
• a hydraulic operating pressure chamber in a brake housing defined by a brake piston, which for performing service braking actions is configured to be acted upon by hydraulic pressure fluid, so that the brake piston can be actuated along a piston longitudinal axis in order to produce a braking action,
• the parking brake device acting on the brake piston by means of a transmission, wherein the transmission translates a rotary motion of an electromechanical actuator into a translational motion and actuates the brake piston in order to perform parking brake actions and to keep the brake piston in an actuated position,
• the transmission comprising a screw spindle and a spindle nut, which are in contact with one another by way of multiple rolling elements, wherein the rolling elements are arranged so that they can move between two stops in a thread of the spindle nut, and
• a spring element arranged between the rolling elements and one of the stops, said spring element allowing the rolling elements to slide in no-load actuation of the transmission and allowing the rolling elements to roll when the transmission is actuated under load.