| 摘要 |
PURPOSE:To absorb vibrations certainly by furnishing a resilient body between an inner and an outer cylinder, forming a pressure receiving liquid chamber in a part of this resilient body, providing an aux. liquid chamber isolated from the liquid chamber. forming an air chamber with a resilient film which constitutes part of the aux. liquid chamber, and by making part of the bulkhead of the pressure receiving liquid chamber from No.2 rigid film having a higher rigidity in the central part than the perimeter. CONSTITUTION:A resilient body 34 is provided between an outer cylinder 16 and an inner cylinder 31, and the outer cylinder 16 is partitioned into a pressure receiving liquid chamber 48 and an aux. liquid chamber 44 by a bulkhead as a part of the resilient body 34, wherein the aux. liquid chamber 44 is formed part of the bulkhead with No.1 diaphragm 26. The pressure receiving liquid chamber 48 and aux. liquid chamber 44 are put in communication through a restrictive passage 54, and part of the bulkhead of the pressure receiving liquid chamber 48 is formed with No.2 diaphragm 24. This diaphragm 24 has a higher rigidity in the central part than at the perimeter, and therein a communication hole 56 is formed whose one side is coupled directly with the air chamber 52 and the other side connected to a negative pressure means. Another air chamber 27 is formed between the diaphragm 26 and the outer cylinder 16, while the first named air chamber 52 is bounded by the diaphragm 24 and outer cylinder 16. Thereby both shake vibrations and idling vibration can be absorbed effectively. |
