| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To increase an operating speed during shrinking a hydraulic actuator. <P>SOLUTION: When the hydraulic actuator 1 for hydraulic equipment is shrunk, a first accumulator oil path 21 between an accumulator 20 and an elongation side oil path 6 is communicated therewith and a second accumulator oil path 22 between the accumulator 20 and a shrinkage side oil path 5 is closed so that operating oil discharged from an elongation side oil chamber 3 of the hydraulic accumulator 1 to the elongation side oil path 6 is sucked into the accumulator 20. When the hydraulic actuator is elongated, the first accumulator oil path 21 between the accumulator 20 and the elongation side oil path 6 is closed and the second accumulator oil path 22 between the accumulator 20 and the shrinkage side oil path 5 is communicated therewith so that the operating oil in the accumulator 20 is discharged from the second accumulator oil path 22 to the shrinkage side oil path 5. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
