Elektromagnetisch betaetigbare Reibungskupplung

摘要

A friction clutch is provided with clutch discs each of which is comprised of a plurality of rings of magnetic material magnetically isolated from each other so that flux follows a sinuous path back and forth between the discs via a plurality of pairs of pole faces. Accordingly, a plurality of areas of magnetic attraction between pole faces is afforded to effect strong engagement between discs, both of which are rotary, when a flux is provided by means of a stationary electromagnet. The arrangement minimizes flux leakage and provides for increased ability to transmit torque. The construction is simple and compact, one such disc being manufactured by providing a composite of concentric magnetic and non-magnetic members which after being formed in an integrated assembly can have material removed to effect a plurality of pole faces. The other disc is effected by mounting spaced magnetic rings on a spring member which serves to maintain separation of the discs when the electromagnet is not energized.