| 摘要 |
PROBLEM TO BE SOLVED: To facilitate adjustment of a damping characteristic with respect to an input vibration frequency. SOLUTION: A buffer unit is equipped with a first passage 3 and second passages 4a, 4b which connect the operation chambers R1, R2, a pressure chamber R3 which is prepared in the middle of the second passages 4a and 4b, a free piston 5 which is inserted into the pressure chamber R3 and the spring element 6 which generates the bias power in proportion to an amount of displacement of the free piston 5 and controls the displacement of the free piston 5, The break point frequency in the gain characteristic of the frequency transfer function of a differential pressure between the operation chambers R1 and R2 for a flow Q from one side of the operation chamber R1 to another side of the operation chamber R2 and the pressure chamber R3 is set based on the relation of at least a differential pressure between the operation chambers R1, R2 and the flow Q1 of the first passage 3, the relation of each differential pressure between the pressure chamber R3 and the operation chambers R1, R2 and the flow Q2 of the second passage 4, the spring constant of the spring element 6, and the pressured area of the free piston 5. A pressure chamber R3 is formed by the housing to fix a partition member 2 to be screwed and fitted to the piston rod to the piston rod. COPYRIGHT: (C)2011,JPO&INPIT
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