ONE-WAY CLUTCH

摘要

PROBLEM TO BE SOLVED: To provide a one-way clutch exerting a torque limiter function certainly in accordance with the size of the input torque in the transmitting direction and free of the risk that dint is generated on the raceway surface by any of sprags. SOLUTION: The one-way clutch is equipped with a plurality of sprags 4 installed in the circumferential arrangement in an annular space 3 between an inner 1 and an outer raceway ring 2, retainers 5 and 6 to hold the sprags 4, and springs 7 for energizing the sprags 4 in the direction of rising within the annular space 3, wherein the sprags 4 are furnished at the outside and inside surfaces with cam faces 41 and 42 contacting with the raceway rings 1 and 2, and one of the cam faces, outer or inner, 42 is composed of a curved surface 42a and a flat surface 42b continued on its lock side to the curved surface 42a. The sprag height Hc when sprag 4 comes into contacts with the corresponding raceway ring 2 at the inflection point 42c between the curved surface 42a and the flat surface 42b is set in J