| 摘要 |
PURPOSE:To improve the damping performance with a compact structure by providing a main and a sub-fluid chambers partitioned vertically by the side walls and partition wall of rubber elastic bodies provided between an inner and an outer cylinders, communicating both fluid chambers by an orifice, providing the connecting band of the rubber elastic body between the side walls in the main fluid chamber, and substituting a part of the connecting band with a mass body. CONSTITUTION:A main fluid chamber 16 and a sub-fluid chamber 18 are partitioned vertically in relation to a partition wall 14 by the side walls 12 of two rubber elastic bodies interposed at a right angle with a space apart between an inner and an outer cylinders 10, 22 and by the partition wall 14 of a rubber elastic body cross-linked between the side walls 12 so as to be parallel to a cylinder shaft, and both fluid chambers 16, 18 are communicated with each other by orifice structure 36. The connecting band 24 of the elastic body cross-linked between the side walls 12 so as to be parallel to the cylinder shaft is provided in the main liquid chamber 16, and a part of the connecting band 24 is substituted with a mass body 26. At the contracted time of the main liquid chamber 16, the outward expansion of the side walls 12 is thereby suppressed, and the rigidity of the remaining rubber elastic part after substitution in the connecting band 24 is relatively enhanced to further heighten the expansion suppressing effect of the side walls 12. As a result, the volume change of the fluid chamber during oscillation is accelerated to display high damping performance. |
