ELECTROMECHANICALLY ACTUATABLE BRAKE AND METHOD FOR OPERATING AN ELECTROMECHANICALLY ACTUATABLE BRAKE

摘要

The invention relates to an electromechanically actuatable brake (2), comprising an electrically actuatable actuator (30) for applying the brake (2) in an application direction (42), which actuator converts a rotary movement of a spindle (20) into a translatory movement of an application element (26), especially a piston, wherein the spindle (20) is driven by an electric motor (8), wherein a mechanical store for energy storage by twisting is provided, the first end of the store being coupled to the spindle (20) and the second end thereof being coupled to a counter-bearing (80), wherein the store takes up energy during rotation of the spindle (20) in the application direction (42), by means of which energy, in a de-energized state of the electric motor (8), the spindle (20) is rotated back opposite the application direction (42), whereby the brake (2) is released. Independently of the total rotational angle covered by the spindle, the brake should rotate said spindle back by a certain angular amount in the event of a fault, without the torque generated by the energy store becoming too large or the drive motor having to be dimensioned too large. To this end, the counter-bearing (80) is rotatably mounted and can be fixed in a plurality of discrete or continuously arranged fixing positions. The invention further relates to an operating method for such an electromechanically actuatable brake.