| 摘要 |
<p>PURPOSE: To enable a plurality of hydraulic actuators to operate without receiving a mutual influence when those hydraulic actuators are operated at the same time. CONSTITUTION: In a hydraulic circuit of a height working vehicle equipped with right and left driving motors 24L, 24R for driving a vehicle, an elevating cylinder 26 for boom rising and falling and an elastic cylinder 25 for expanding and contracting the boom, the oil pressure circuit is separated into a first group having a first oil pressure pump driven by an engine 21 and a second group having a second oil pressure pump 23. Then, a direction control valve 28 controlling a driving motor 24L of a left wheel and a direction control valve 29 controlling the elastic cylinder 25 of the boom are disposed in the circuit A of the first group, and a direction control valve 30 controlling a driving motor 24R of a right wheel and a direction control valve 31 controlling the elevating cylinder 26 of the boom are arranged in a circuit B of the second group.</p> |
