Armature assembly for an electromagnetic coupling

摘要

An armature assembly for an electromagnetic clutch includes a plastic spider having a central sleeve which is joined to a central driven hub by insert molding. A circular web is molded integrally with and extends radially from the sleeve and carries an annular armature disc which is adapted to coact with the electromagnetic rotor of the clutch. When the clutch is energized, the web flexes adjacent the sleeve in the manner of a living hinge to enable the armature disc to move axially into engagement with the rotor. Upon de-energization of the clutch, the resilient memory of the plastic retracts the armature disc from the rotor. In addition to eliminating the need for separate springs and other components, the plastic spider provides torsional and acoustical dampening.