| 摘要 |
<p>PURPOSE:To relieve the shock at the time of a start of an actuator, by providing a double-acting piston type accumulator in parallel with an actuator and switching a passage, which is connected to a normal-direction/reverse direction chamber of the accumulator, in a manner linked with the operating direction of the actuator. CONSTITUTION:An actuator 7 is connected with a double-acting piston type accumulator 11, which is placed parallel to the actuator 7. Connecting system-paths 5a and 5b, which connect the actuator 7 and the accumulator 11, are interposed with switching valves 12 and 13, which are connected to a normal direction/reverse direction operating chambers 11a and 11b of the accumulator 11, respectively, and moreover which are able to switch the operating direction of the accumulator 11. A 3-position switching valve 4 is provided with sensors F and R, which can detect the normal/reverse position, while the accumulator 11 is provided with sensors X and Y, which can detect the normal/reverse end position. When the actuator 7 is started, both switching valves 12 and 13 are operated by the output from each sensor, thereby shifting a piston 11c of the accumulator 11 toward the opposite end. As a result, the shock at the time of a start of the actuator 7 can be relieved.</p> |
