| 摘要 |
PURPOSE:To have a compatibility of the vibration restricting performance and anti-vibrative performance by providing an elastic stopper which is to block the specified ones of those orifices furnished in a partition wall to divide the lower chamber when the insulator rubber makes deformation in the vibration restricting range. CONSTITUTION:The upper 1 and lower 2 flanges are connected by a cylindrical insulator rubber 3, the space in which is divided into the upper 6 and lower 7 chambers by a partition wall 4 provided with two or more orifices 5a, 5b, and the chambers 6, 7 are filled with fluid 8 fully but a certain void 6a at a part of the upper chamber 6. The orifice 5a at the center of partition wall 4 is given a larger diameter, and an elastic stopper 20 is installed solidly with the insulator rubber 3, projecting from the bottom of the lower chamber 7 in such an arrangement that the stopper 20 blocks said major orifice 5a when the insulator rubber 3 has made deformation to a certain specific extent. This construction ensures that the tip of the stopper 20 blocks the orifice 5a and the vibration restricting performance is stabilized. Provision of void 6a also will lessen the spring constant to give an excellent anti-vibration performance. |
