| 摘要 |
PURPOSE:To make it possible to enlarge a sectional area of a restriction passage for communicating a plurality of liquid chambers defined in a hollow chamber, by forming the restriction passage outside of the hollow chamber. CONSTITUTION:A bed plate 24 on an engine side and a cylindrical member 10 on a vehicle body side are connected with each other by rubber 22. A hollow chamber defined by the cylindrical member 10 and the rubber 22, etc. is designed to form a liquid chamber 28. The liquid chamber 28 is divided into an upper liquid chamber 28A and a lower liquid chamber 28B by a partition board 30. There is provided a restriction passage forming an orifice 42 at the outer circumferential portion of the cylindrical member 10. The upper liquid chamber 28A and the lower liquid chamber 28B are connected with each other by communication passages 44 and 46. Accordingly, a sectional area of the orifice 42 may be enlarged to increase a frequency at which the orifice 42 is blocked. |
