Patent ID: 7780569

Claim:
A traction drive type continuously variable transmission characterized by comprising a first input/output shaft rotatably supported by a casing, a second input/output shaft rotatably supported by the casing, a V-pulley consisting of a pair of pulley members supported by the first input/output shaft and forming a V-shaped groove whose groove width is variable, a ring engaging the V-pulley and supported at the outer periphery, a mechanism for moving the ring around the second input/output shaft, the mechanism for moving the ring including an arm supported turnably around the second input/output shaft, at least three guide rollers disposed around the outer periphery of the ring, the guide rollers being rotatably supported by the arm, and a pair of face cams, movable and fixed, supported coaxially with the first input/output shaft, the movable face cam being movable axially of the first input/output shaft and being in direct or indirect contact with the V-pulley, the other face cam being fixed to the casing, the arrangement being such that when the movable face cam rotates, it moves toward or away from the fixed face cam, the movable face cam rotating in operative association with the turning of the arm.