Patent ID: 6269917
Filing Date: 2001-08-07
Classification: F16D

Abstract:
An electromagnetically actuated brake, having a high stopping moment and short braking paths and consisting of a cam disc (3) which is guided in a torsion-proof manner, a spring (4) which presses the cam disc axially into the locking position, and an electromagnet (5, 6, 7) which unlocks the cam disc against the spring (4), characterized in that the axially movable cam disc (3) is ferromagnetic and has a number of cams (31) which engage, in a form-locking manner, in the recesses (11) in the rotatable part (1) to be braked, that the cams (31) and recesses have flanks standing perpendicularly to the direction of rotation, and that the spring is constructed as a leaf spring (4) with three bending arms which act upon the face of the cam disc (3) at an equal distance from one another, characterized in that the electromagnet (5, 6, 7) includes a stationary coil body (5) which includes guide slots (51) for the cam disc (3), the stationary coil body (5) performs an axial lifting movement, and at the same time, carries an electric winding of the electromagnet, further characterized in that the cams (31) are injection-molded onto a ferromagnetic plate (32) as plastic parts, and the cams and the stationary coil body (5) with the guide slots (51 ) consist of a combination of plastics which can be subjected to high stresses and has good elastic properties.