| 摘要 |
PURPOSE:To eliminate the necessity for providing a dynamic damper, by limiting external expansion of a rubber mount through a limit ring, arranging the limit ring in an intermediate part extension-contraction directioally of the rubber mount and arranging the characteristic frequency, of a device comprising both the mount and the ring, to 50-400Hz. CONSTITUTION:A limit ring 21, limiting expansion of a rubber mount 4 to the outside, is arranged in an intermediate part extension-contraction directionally of the rubber mount 4, especially in the central portion between both base plates 1, 2. Peripheral surfaces of the limit ring 21 are disclosed from a surface of the rubber mount while the other surface is adhesively vulcanized to the rubber mount 4, when assumed W for weight of the ring, k for the extension-contraction directional spring constant of the rubber mount 4, g for the gravitational acceleration and f for the characteristic frequency of a device consisting of the rubber mount 4 and the limit ring 21, the condition as shown by an expression is satisfied, further W and k are set to obtain relation of 50Hz<=f<= 400Hz. |
