| 摘要 |
<p>PURPOSE: To provide a travelling control device of a working vehicle which favorably carries out car speed command operation while maintaining a straight forwarding state even when output rotating speed of an engine changes. CONSTITUTION: Target speed-change positions of a pair of non-stage transmissions 11R, 11L to separately change respective travelling speed of a pair of left and right travelling devices in non-stage, a pair of hydraulic cylinders 33R, 33L to operate to change speed of them and a pair of operated bodies 29 corresponding to a command position of a main speed-change lever 24 are set, a pair of the hydraulic cylinders 33R, 33L is actuated so as to be at the target speed-change position, and a pair of the hydraulic cylinders 33R, 33L is actuated so that output speed of a pair of the non-stage transmissions 11R, 11L becomes target speed for synchronization when a speed-change position of either one of the operated bodies 29 becomes the target speed-change position.</p> |
