| 摘要 |
<P>PROBLEM TO BE SOLVED: To miniaturize a hydraulic accumulator capable of accumulating the oil pressure of two or more systems. <P>SOLUTION: When oil pressure is applied from a first oil passage 11a to a first oil chamber 21, a first piston 15 is moved against the resilient force of a return spring 18 to accumulate oil pressure in the first oil chamber 21. When oil pressure is applied from a second oil passage 11b to a second oil chamber 22, a second piston 16 is moved integral with the first piston 15 against the resilient force of the return spring 18 to accumulate oil pressure in the second oil chamber 22. Since moving routes of the first and second pistons 15, 16 overlap each other, the axial dimension can be reduced as compared with the case that two hydraulic accumulators are simply connected back to back. When oil pressure is accumulated in the second oil chamber 22, the first and second pistons 15, 16 are moved in a state of abutting on each other, so that the first and second pistons 15, 16 are integrated to each other to hardly be tilted. Thus, the generation of a twist can be prevented. <P>COPYRIGHT: (C)2011,JPO&INPIT |
