| 摘要 |
PROBLEM TO BE SOLVED: To establish a satisfactory vibration absorbing performance required of a resilient body as a main body to make isolation of vibrations and also ozone resistance required of a resilient film to serve as a bulkhead of a differential aux. liquid chamber. SOLUTION: A vibration isolating device includes a diaphragm 30 to constitute part of a bulkhead for a differential aux. liquid chamber with the inner capacity expanded and contracted in cooperation with the relative displacement of an inner cylinder metal fitting 22 with an outer cylinder metal fitting 12 and a resilient body to constitute part of the inner wall of a main liquid chamber, wherein the diaphragm 30 and resilient body are formed separately from different sorts of rubber material. For example, the diaphragm 30 is made from a rubber material of EPDM (ethylene propylene rubber) type having a high ozone resistance while the resilient body 24 is made from a rubber material of NR(natural rubber) family having a small dynamic magnification, which enables suppression of ozone deterioration of the diaphragm 30 whose external surface is exposed to the air and allows enlargement of the vibration absorbing ability of the resilient body as a main body to perform vibratory absorption. |
