| 摘要 |
PROBLEM TO BE SOLVED: To prevent a degree of freedom at a tuning of an orifice passage from being decreased by a leak valve when the leak valve is installed at a side of the orifice passage.SOLUTION: An insulator 16 for connecting an inner cylinder 12 with an outer cylinder 14 is provided with the first liquid chamber 30 and the second liquid chamber 32 and they are defined by the first partition wall 20 and the second partition wall 22 formed at the opposite side of the inner cylinder 12. Both the first orifice forming member 34 and the second orifice forming member 36 are bridged between the first partition wall 20 and the second partition wall 22, and then an orifice passage 24 is formed by the first orifice groove 35 and the second orifice groove 37 formed at the outer peripheral parts. The liquid chamber side ends 35a and 37a of the first orifice groove 35 and the second orifice groove 37 are formed to be spaced apart from end portions 34a, 36a. The end portion 34a and the end portion 36a are connected by the first partition wall 20. Both axial sides of this connecting part are provided with the first leak groove 26 and the second leak groove 28 and each of them is provided with the first leak valve 25 and the second leak valve 27 acting as one-way valve in a reversing direction.SELECTED DRAWING: Figure 8 |
