Electromagnetic clutch

摘要

An electromagnetic clutch includes a first rotation transmission portion, annular field core, rotation stop member, second rotation transmission portion, armature, and spring member. The annular field core is supported by the first rotation transmission portion via a first bearing. The first bearing is housed in a hollow portion of the field core and fitted on an inner circumferential surface of the field core. The rotation stop member includes a flat portion which is fixed to an end of the field core on a side opposite to the armature. The flat portion is formed integrally with a retaining piece which projects toward the hollow portion of the field core and faces the first bearing when viewed from the axial direction of the field core.

主权项

1. An electromagnetic clutch comprising:
a first rotation transmission portion including a rotor in which an annular groove is formed; an annular field core which is inserted in the annular groove to allow a magnetic flux pass through the rotor, and is supported by said first rotation transmission portion via a first bearing; a rotation stop member which regulates rotation of said field core; a second rotation transmission portion which is arranged at a position where the rotor is sandwiched between said second rotation transmission portion and said field core, and is rotatably supported by said first rotation transmission portion via a second bearing; an armature which is arranged to face the rotor at an air gap and is supported by said second rotation transmission portion to be movable in an axial direction; and a spring member which biases said armature in a direction in which said armature is spaced apart from the rotor, wherein the first bearing is housed in a hollow portion of said field core and fitted on an inner circumferential surface of said field core, said rotation stop member includes a flat portion which is fixed to an end of said field core on a side opposite to said armature, and the flat portion is formed integrally with a retaining piece which projects toward the hollow portion of said field core and faces the first bearing when viewed from the axial direction of said field core.