| 摘要 |
PURPOSE:To absorb vibrations over a wide frequency range by furnishing No.2 aux. liquid chamber in a partitioning member which is to bound a main liquid chamber from an aux. liquid chamber, partitioning the aux. liquid chamber by No.1 diaphragm into a liquid chamber and air chamber, and forming an air chamber also in No.2 aux. liquid chamber by No.2 diaphragm. CONSTITUTION:A liquid chamber 28 is formed with an outer cylinder 16, resilient body 22, and diaphragm 18 and partitioned by an upper and a lower partition plate 30A, 30B into a main liquid chamber 32 and No.1 aux. liquid chamber 34, which are put in communication through No.1 restrictive passage 52. Between the upper and lower partition plates 30A, 30B, No.2 diaphragm 68 is installed to bound No.2 aux. liquid chamber 70 from an air chamber 74, while No.1 air chamber 20 is formed in the No.1 aux. liquid chamber 34 by No.1 diaphragm 18, wherein the main liquid chamber 32 and No.2 aux. liquid chamber 70 are put in communication through another restrictive passage 46. When the air chamber 74 is put in a negative pressure, the diaphragm 68 is put in tight attachment to the recess in the upper partition plate 30A to cause stop of the flow of liquid 29 in the restrictive passage 46, while liquid flow remains only in the No.1 restrictive passage 52 so as to absorb shake vibrations effectively. |
