Clutch apparatus

A clutch apparatus comprising:

• an outer ring;
• an inner ring arranged radially inside said outer ring and coaxially with a center axis of said outer ring and rotatably relative to said outer ring;
• a torque transmitting portion having a plurality of torque transmitting members arranged for transmitting torque having the center axis as the center between said outer ring and said inner ring;
• and
• a restricting mechanism for restricting input torque that exceeds a predetermined value from being input from an input torque transmitting member to a driving ring of said outer ring and said inner ring and inverse torque that is input to a driven ring of said outer ring and said inner ring and exceeds the predetermined value from being input to said input torque transmitting member;
• wherein said input torque transmitting member is disposed radially inside said inner ring and coaxially with said inner ring and has an outer peripheral surface opposed radially to an inner peripheral surface of said inner ring;
• said restricting mechanism comprises a tolerance ring disposed in contact with the inner peripheral surface of said inner ring and the outer peripheral surface of said input torque transmitting member;
• said tolerance ring is integrally formed with a plurality of projections that are equidistantly apart from each other in a circumferential direction and projected radially outwardly;
• and
• each of said plurality of projections is arc-shaped in cross section taken along a plane perpendicular to the center axis and disposed to be in pressure contact with the inner peripheral surface of said inner ring.