| 摘要 |
<p>PURPOSE:To enable the connection of a hydraulic pump, idling at a composite operation time, to a desired actuator, by a method wherein at least one of a plurality of actuators is connected to a plurality of variable discharge capacity pumps via a ON-OFF switch valve. CONSTITUTION:A hydraulic circuit for a hydraulic shovel consists of variable discharge capacity hydraulic pumps 1-4, and hydraulic actuators for an arm cylinder 6, boom cylinders 7A, 7B, a removing motor 8, and travelling motors 9, 10. Each hydraulic actuator is connected to each hydraulic via ON-OFF electromagnetic switch valves 11A-11C, 12A-12C, 13A-13D, and 14A-14D, and each electromagnetic valve is switched ON or OFF according to a timing and a chart on the priority order previously determined.</p> |
