Electromechanically operatable parking brake for use as duo-servo drum brake in motor vehicle, has back-closure allowing elements allowing back-closure by adjustment of brake shoes based on position of brake shoes in released condition

摘要

The brake has a brake actuation device that is operated by an electromechanical actuator. The brake actuation device is formed as an expansion mechanism and acts upon two brake shoes (10). Back-closure allowing elements allow back-closure by adjustment of brake shoes based on the position of the brake shoes in a released condition. A system sensor detects the position of the brake shoes related to front surfaces (21) of the brake actuation device or related to contact surfaces connected with the brake actuation device in the released condition.