Electromagnetic clutch having a structure for reducing torsion

Details Electromagnetic clutch having a structure for reducing torsion Electromagnetic clutch having a structure for reducing torsion

F - Mech Eng,Light,Heat,Weapons

16

D

192/6

F16D 27/10 (2006.01) F16D 27/112 (2006.01) F16D 27/14 (2006.01)

Patent

CA 1311200

ELECTROMAGNETIC CLUTCH HAVING A STRUCTURE FOR REDUCING TORSION ABSTRACT OF THE DISCLOSURE An electromagnetic clutch according to the present invention includes a first rotatable member made of magnetic material and a second rotatable member connected to a driven member. An annular magnetic member is slidably connected to the second rotatable member so that the annular magnetic member can be capable of axial move- ment within a limited range. The annular magnetic member faces the axial end surface of the first rotatable member with an axial air gap therebetween. An electromagnet is associated with the first rotatable member to attract the annular magnetic member to the axial end sur- face of the first rotatable member so that the rotational force of the first rotatable member is transmitted to the second rotatable member through the annular magnetic member by pulling the annular magnetic member into full contact with the axial end surface. The first rotatable member comprises an annular main body and an annular pul- ley member. The annular pulley member surrounds the annular main body with an annular gap therebetween. An annular elastic member for reducing torsional forces and vibration in the second rotatable member is disposed in the annular gap between the annular main body and the annular pulley member.

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