Two-way differential clutch

摘要

A two-way differential clutch is provided which can prevent the resilient ring for biasing a friction plate from expanding radially outwardly and getting out of the mounting position due to centrifugal force during high-speed rotation. Two retainers having different diameters are mounted between a rotary shaft and an input gear. The large-diameter retainer is fixed to the input gear. Sprags are mounted in pockets formed in the large-diameter retainer and the small-diameter retainer. A flange and a ring groove are formed at one end of the small-diameter retainer. A friction plate arranged on one side of the flange is pressed against the flange by a resilient ring mounted in the ring groove. A restricting portion for restricting the amount of radial expansion of the resilient ring is formed on the friction plate to prevent the resilient ring from radially expanding too much due to centrifugal force during high-speed rotation.