| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of noises by lowering a dynamic spring constant in a range of a high frequency caused by the resonance of rubberlike elastic bodies. SOLUTION: A mass fitting 3 is interposed between an inner cylinder 1 and an outer cylinder 2, rubberlike elastic bodies 4 and 5 are provided for a space between the inner cylinder 1 and the mass fitting 3, and a space between the outer cylinder 2 and the mass fitting 3 respectively, the mass fitting 3 is formed into a cylindrical shape, void portions 6 and 7 are vertically provided while the inner cylinder 1 is being held in the rubberlike elastic body 4 between the inner cylinder 1 and the mass fitting 3, and the spring constant ratio of the rubberlike elastic body 4 between the inner cylinder 1 and the mass fitting 3 to the rubberlike elastic body 5 between the mass fitting 3 and the outer cylinder 2, is equal to or more than 1:2. |
