| 摘要 |
PURPOSE:To improve the vibration-proof performance by interposing a rubber elastic body between an inner fitting and an outer fitting, and forming a pressure-receiver chamber and a balance chamber communicated with each other by an orifice passage, and arranging a partitioning frame member in the partitioning wall of the elastic body to form a vibration cut-off part, and providing a fluid pressure absorbing mechanism in the vibration cut-off part. CONSTITUTION:An inner fitting 12 and an outer fitting 14 are bonded integrally with each other by a rubber elastic body 16. A fitting 20 consists of a thin cylindrical part 26 having a large diameter and a belt-like part 28 projecting from the cylindrical part 26 to the axial direction and curved into U-shape. In the belt-like part 28, a partitioning frame part 32, of which projection tip is curved inward so as to enter a rectangular frame part, is provided. The rubber elastic body 16 is also filled inside of the partitioning frame part 32, and deformation of the rubber part 16 of a main frame is cut-off to form a vibration cut-off part 46. A communication hole 47 for communicating both pocket parts 34, 36 is provided in the cut-off part 46, and a movable member 48 is inserted to the communication hole 47 loosely. Consequently, difference of the inner pressure of a pressure-receiver chamber and a balance chamber 54, 56 in both sides of the movable member 48 is reduced. |
