| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic motion control device adaptable to the expansion-contraction of oil due to variation in temperature without degrading the function of maintaining the motion stop state of an object to be controlled. <P>SOLUTION: This hydraulic motion control device includes: a fifth compartment 25 capable of storing oil; a piston 80 installed in the fifth compartment 25; a spring 90 for biasing the piston 80; a first check valve 71 which is installed in a fifth passage 51 and which prevents the oil from flowing out of a fourth chamber 24 into the fifth compartment 25 and allows the oil to flow out of the first and fifth compartment 21, 25 to flow into the fifth compartment 24; and a second check valve 72 which is installed in a third passage 53 and which prevents the oil from flowing out of the third compartment 23 into the fifth compartment 25 and allows the oil flowing out of the second and fifth compartments 22, 25 to flow into the third compartment 23. The spring 90 has a biasing force for obstructing the movement of the piston 80 so that the oil does not flow into the fifth compartment 25 when the oil is not expanded. <P>COPYRIGHT: (C)2009,JPO&INPIT |
