FUL TOROIDAL STEPLESS TRANSMISSION

PROBLEM TO BE SOLVED: To provide a toroidal stepless transmission equipped with a transmission ratio control mechanism which feedbacks an inclined angle of a power roller by a mechanical system. SOLUTION: The transmission ratio control mechanism 201 is equipped with an arm member 21 including a first coupling section 21a for coupling an actuator 22, a second coupling section 21b for coupling the spool 23s of a ratio control valve 23, and a third coupling section 21c for coupling a piston 26p of a hydraulic servo 26 and the power roller 4. When starting to drive the actuator 22, the arm member 21 swings centering around the third coupling section 21c to move the spool 23s, controlling hydraulically the hydraulic servo 26. When the piston 26p and the power roller 4 start to move, the arm member 21 swings centering around the first coupling section 21a to move the spool 23s, thus allowing the feedback control to be carried out. COPYRIGHT: (C)2009,JPO&INPIT