Patent ID: 6622843
Filing Date: 2003-09-23
Classification: F16D

Abstract:
An electromagnetic clutch for transmitting and interrupting a driving force of a driving source to a driven device, the electromagnetic clutch comprising:a driving-side rotation member disposed to be rotated by the driving source; a driven-side rotation member disposed rotatably to be connected to a side of the driven device; an electromagnetic coil for generating an electromagnetic force when being supplied with power; an armature connected to one of the driving-side rotation member and the driven-side rotation member, the armature having a friction surface that contacts the other one of the driving-side rotation member and the driven-side rotation member by the electromagnetic force generated from the electromagnetic coil, to transmit the driving force from the driving-side rotation member to the driven-side rotation member, wherein the driving-side rotation member, the driven-side rotation member and the armature are disposed so that a rotation axis of the armature is substantially horizontal; a bearing member located between the driven-side rotation member and the driving-side rotation member; a circular recess portion recessed in an approximate U-shape in cross section in a rotation axial direction of both the driving-side rotation member and the driven-side rotation member, to enclose the armature at an outer radial side of the armature; and a cylinder member disposed to cover an outer peripheral side of the armature, wherein the circular recess portion is provided at an axial end surface of the cylinder member in the axial direction.