| 摘要 |
A switchable liquid-filled vibration absorbing mount which is caused to cope with the shaking vibrations and the idle vibrations by opening/closing orifices and which is enabled to hold the stable characteristics for a long time without being troubled by the slackness of the closed state even after the opening/closing actions are repeated. For this vibration absorbing mount, a first mounting fixture (1) and a second mounting fixture (2) are jointed by a vibration absorbing base (3). In this internal space, there are arranged a partition member (4), a first diaphragm (5) and a second diaphragm (6). A main liquid chamber (7) and an auxiliary liquid chamber (8) are caused to communicate by two inner and outer orifices (14) and (13). A balance chamber (9) is defined between the first and second two diaphragms (5) and (6), and a switching chamber (10), into which the atmospheric pressure and a vacuum can be introduced, is defined between the second diaphragm (6) and the second mounting fixture (2). The inner orifice (14) is formed with an opening. At the central portion of the first diaphragm (5), there is provided a valve member (15) which has a protrusion (17) to be fitted in the inner orifice (14). This inner orifice (14) can be opened/closed with the protrusion (17) being fitted in the inner orifice (14).
|
