Patent ID: 8708110

Claim:
A brake device for reducing the speed of a moving brake body by pressing a brake element onto the brake body, a conversion means for converting a rotational movement of a brake drive shaft into a translation movement of the brake element in the direction towards the brake body being provided, wherein a rotary impact mechanism is fitted between the brake drive shaft and the conversion means, said rotary impact mechanism including an impact armature and an elastic member which is directly supported by the impact armature and configured to apply an elastic force by which the impact armature is urged in a direction of the brake element, wherein the rotary impact mechanism comprises a driving wheel, said impact armature and the driving wheel being pressed against one another by the elastic force so that the impact armature and the driving wheel are in engagement with one another via axially projecting drivers while transferring a torque from the brake drive shaft to the conversion means, in the course of which, by overcoming the elastic force and by separating the engaged impact armature from the driving wheel by shifting the brake drive shaft into the axial direction a transfer of the impact armature occurs, so that a rotary impact impulse is exerted on the driving wheel when rotation continues and wherein the impact armature engages with a helical control groove of the brake drive shaft via a driving pin.