| 摘要 |
PROBLEM TO BE SOLVED: To provide an output shaft reversely rotating means in a hydrostatic continuously variable transmission including: a hydraulic pump formed of a plurality of plungers provided in cylinders, and a hydraulic motor respectively provided between two swash plates; a hydraulic circuit provided between the plunger of the hydraulic pump and the plunger of the hydraulic motor and including a high-pressure oil passage feeding an operating fluid from the hydraulic pump to a hydraulic motor side, a low-pressure oil passage feeding the operating fluid from the hydraulic motor side to a hydraulic pump side, and a hydraulic selector valve, which switches the plunger to the high-pressure oil passage or the low-pressure oil passage by abutting on the inner peripheral surface of an eccentric cam ring and reciprocating in the radial direction of a valve body; and a lock-up mechanism, which changes a speed ratio by tilting at least one of the swash plates and which closes the hydraulic circuit by displacing the eccentric cam ring by the actuator.SOLUTION: The actuator further drives the eccentric cam ring to displace it in a direction reverse to the direction in the normal operation to rotate an output shaft in a direction reverse to the inputting rotating direction. |
