Patent ID: 7090063
Filing Date: 2006-08-15
Classification: F16D

Abstract:
1. An electromagnetic clutch comprising: an exciting coil; a rotor that is rotationally driven by a motive power source; an armature plate facing opposite said rotor along the axial direction, which is attracted to said rotor by an electromagnetic force generated as power is supplied to said exciting coil; a hub having an axial center matching the axial center of said armature plate; an outer plate connected to said armature plate; an inner plate connected to said hub; and an elastic member held at an annular gap formed as said outer plate and said inner plate are assembled together and bonded onto both said outer plate and said inner plate, characterized in: that a portion of said elastic member on the inner plate side includes a projected part made to project outward along the axial direction so as to achieve contact with said armature plate when no power is supplied, with a surface of said projected part, which achieves contact with said armature plate when no power is supplied, having no coating applied thereto; that holding portions of said outer plate and said inner plate used to hold said elastic member face opposite each other over said annular gap; that the measurement of said holding portion at said outer plate taken along the axial direction is greater compared to the measurement of said holding portion at said inner plate taken along the axial direction; and that said outer plate includes a passing hole at which a member used to fasten said outer plate to said armature plate is inserted and a projected part made to project from the circumferential edge of said passing hole toward said armature plate.