| 摘要 |
PURPOSE:To heighten a vibration suppressing effect, by providing recesses on the peripheral surface of an inner cylinder, on which an outer cylinder is fitted, and by providing means in the recesses to change the capacity of each recess depending on the change in the volume of the opening between the inner and the outer cylinders to keep the pressure of a fluid constant. CONSTITUTION:An inner cylinder 1 is coupled at both the ends to the ends 5 of shafts. An outer cylinder 2 is fitted on the inner cylinder 1. One or more recesses 7 are provided on the peripheral surface of the inner cylinder 1. A piston 8 is housed in each recess 7 and supported by an elastic member 9. Sealing members 10 are provided on the piston 8. A communication hole 11 for the atmosphere is provided near the bottom of the recess 7. A fluid is sealed in the opening 3 between the inner cylinder 1 and the outer cylinder 2. As a result, pressure acts to the piston 8 depending on the change in the pressure or volume of the fluid in the opening 3 to deform the elastic member 9 to move the piston to keep the pressure of the fluid constant. A vibration suppressing effect is thus heightened. |
