| 摘要 |
PROBLEM TO BE SOLVED: To provide an antivibration device which damps vibrations in different frequency regions by two kinds of orifice passages without increasing the number of components.SOLUTION: An antivibration device 1 includes: an insulator 30; and a partition member 40 and a diaphragm 50 which are attached to the insulator 30. The partition member 40 includes: a lower holder 41 attached to the insulator 30; and an elastic membrane member 43 attached to the lower holder 41. A first orifice passage 45 is formed in the lower holder 41 and a second orifice passage 46 is formed in a gap between the elastic membrane member 43 and a displacement restriction part 41g of the lower holder 41. When vibration is larger than a predetermined amplitude, the elastic membrane member 43 is elastically deformed to close the gap between the elastic membrane member 43 and the displacement restriction part 41g.SELECTED DRAWING: Figure 1 |
