| 摘要 |
PURPOSE:To sufficiently restrict increase in a dynamic spring constant within a high-frequency band in a liquid-containing vibro-isolation unit by communicating a plurality of liquid chambers with each other by throttle passages differing in length or cross section and resonating the columns of liquid in the passages at various frequencies. CONSTITUTION:A resilient member 3 chiefly made of rubber or similar resilient mate rial is disposed between an internal cylinder 1 and an external cylinder 2. Said resilient chamber 3 has a cylindrical member 4 on the external face thereof. As one example of the conjunction of the resilient member 3 to the internal cylinder 1 and the external cylinder 2, the internal face of the resilient member 3 is brought in vulcanized contact with the internal cylinder 1 and the external cylinder 2 is fixed by caulking on the external face thereof via an O-ring. Plural pairs of liquids chambers 5 and 6 which are in the side positions with respect to the axial direction of the resilient member 3 and opposted to each other in the diametral direction of on and one plane containing the axis are formed separately in the axial or radial direction. In addition, the liquid chambers 5 and 6 are communicated with each other by throttle passages 7 and 8 differing in at least one factor of cross section and lengths for example, the cross section. |
