Electromechanically actuatable brake e.g. floating caliper disk brake, for motor car, has shifting device inhibiting mechanical efficiency of motor drive when predefined brake application force is exceeded in tensioned state

摘要

The brake has an actuating element formed as a gear box for converting a rotational motion of a rotation direction-reversible electric motor into a translational movement. A shifting device (33) is provided in different switching positions by flow of power from a gear motor drive such that mechanical efficiency of the motor drive is not interfered by the shifting device in a released state of the brake. The shifting device inhibits the mechanical efficiency of the motor drive when predefined brake application force is exceeded in a tensioned state of the brake. The shifting device is formed as a mechanically movable shifting device, an automated self-actuated shifting device, an electroless shifting device and a force-dependant shifting device. An independent claim is also included for an operation method for an electromechanically actuatable brake for a motor car.