| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the degree of freedom in equipment layout by miniaturizing an operating oil tank, to reduce the passage resistance of a pump suction pipe and oil level change caused by the inclination of a vehicle and to eliminate anxiety about overflow. SOLUTION: This hydraulic device has a plurality of actuators 29, 30 and a plurality of hydraulic pumps 25, 26 in one system. Operating oil tanks 27, 28 are provided in proximity for the respective dispersedly installed hydraulic pumps 25, 26, and the respective operating oil tanks 27, 28 are hermetically sealed and communicated by a communicating pipe 36. One operating oil tank 27 is formed in such a size as to be able to cope with the oil level change caused by all the actuators, and the operating oil tank 27 is provided with a pressure mechanism 31 for pressurizing the interior of the tank with air, and a check valve 38 for making air escape with the rise of the oil level. The other operating oil tank 28 is provided with an oil level fall detecting mechanism 39 and an air vent plug 40 to fill the tank 28 with operating oil.</p> |
