| 摘要 |
PROBLEM TO BE SOLVED: To realize a structure capable of reducing trembling in gear change caused by the fluctuation of the torque of the transmitted motive power, and preventing a driver from having incongruity. SOLUTION: The opening and closing of a control valve for controlling the feeding and discharging of the pressure oil to hydraulic actuators 17, 17 is controlled by a precess cam 23 mounted on a trunnion 7 for controlling the gear change. The axial load of pivots 6, 6 is added to the trunnion 7 from a power roller 9 frictionally engaged with both input and output side-discs in transmitting the power. The precess cam 23 is mounted at a rear part with respect to the acting direction of the load. According to this constitution, the displacement from a normal position of the precess cam 23 can be reduced even when the large torque is transmitted, and the problem can be solved.
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