| 摘要 |
A hydraulic-driven working vehicle, wherein a pressure oil is fed from a hydraulic pump (30) to both hydraulic motors (21A, 21B) through piping to perform forward and backward runnings and the rotating directions of the hydraulic motors are changed to switch a running mode between a forward running and a reverse running, the speed of an engine (25) and a hydraulic pressure (oil flow rate) from the hydraulic pumps are controlled to vary the speeds of the hydraulic motors in order to control the speed of the vehicle and, when the vehicle performs a stationary turning (Z) by a turning (pivot turn), either of valve means (37A, 37B) is switched to the state of ON, whereby the pressure oil can be fed from the hydraulic pump to the other port of the right and left hydraulic motors so as to rotate the right and left hydraulic motors in the directions reverse to each other in order to perform a stationary turning, and the reverse rotation of the right and left front wheels (3A, 3B) for the stationary turning can be performed by one hydraulic pump only so that it is advantageous in cost and mountability.
|
