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 to actuate the brake piston 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 to move between a first stop and a second stop in a thread of the spindle nut,
• a spring element arranged between the rolling elements and the first stop, 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, and wherein a flange of the screw spindle is received by a stepped bore in the brake housing and supported by a first axial bearing on the brake housing, whilst a second axial bearing is arranged between the flange of the screw spindle and a canister that is connected to the brake housing, and suppresses any axial movement of the screw spindle along a longitudinal axis of the brake piston, wherein the canister is pressed into the stepped bore in the brake housing, and wherein the canister forms the first stop of the spindle nut.