| 摘要 |
PROBLEM TO BE SOLVED: To improve the vibration control effect based on the flowing effect of a fluid by providing, on the wall part of one of divided cambers formed of a body rubber elastic body, at least one thin wall part that is thinned so as to be easily elastically deformable. SOLUTION: A fluid chamber 46 is partitioned by a shade member 22 into two divided chambers 70, 72 mutually communicating through a contracted passage 64. A body rubber elastic body 15, which constitutes a part of the wall part of one divided chamber 70, has a substantially thick wall tapered annular form or cylindrical form. A pocket-like recessed part 31 with a prescribed depth opened toward the fluid chamber 46 is formed on the body rubber elastic body 15. The body rubber elastic body 15 is thinned in the forming part of the pocket-like recessed part 31 to the thickness corresponding to the thickness of only the bottom wall part 33 of the pocket-like recessed part 31. The bottom wall part 33 of the pocket-like recessed part 31 has a substantially fixed wall thickness corresponding to a thickness dimension of about 1/4-1/3 of the wall thickness of the cylindrical wall part of the body rubber elastic body 15. |
