| 摘要 |
PROBLEM TO BE SOLVED: To absorb a rotating speed difference between respective wheels when the respective wheels are steered at longitudinal travel time and lateral travel time in a laterally travelable vehicle having front and rear and left and right wheels driven in rotation by two HST pumps. SOLUTION: A right front wheel 3 is driven by a first hydraulic motor 23, and a left front wheel 4 is driven by a second hydraulic motor 24, and a right rear wheel 5 is driven by a third hydraulic motor 25, and a left rear wheel 6 is driven by a fourth hydraulic motor 26. At longitudinal travel X time, pressure oil is supplied to the first and the second hydraulic motors 23 and 24 by one HST pump 30, and pressure oil is supplied to the third and the fourth hydrulic motors 25 and 26 by the other HST pump 31, and at lateral travel Y time, pressure oil is supplied to the first and the third hydraulic motors 23 and 25 by one HST pump 30, and pressure oil is supplied to the second and the fourth hydraulic motors 24 and 26 by the other HST pump 31. |
