| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an actuator driving hydraulic circuit for preventing the occurrence of cavitation and generating output required for an actuator while reducing its size and saving energy. <P>SOLUTION: In a third oil path P5 via which the actuator 31 is connected to an oil tank 54, check valves 60, 61 are provided for allowing the movement of operating oil from the oil tank 54 to the actuator 31. When the actuator 31 is driven in one direction by an external load on an alternating component, the operating oil is supplied from the oil tank 54 via check valves 60, 61 to the actuator 31, thus preventing the occurrence of cavitation without reducing pressure in the actuator 31. Still, the actuator 31 can be operated without the need for the operation oil from the oil pump 56, therefore reducing the size of the oil pump 56 and saving driving energy, accordingly. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
