| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration isolator capable of reducing rigid body resonance while keeping a low spring characteristic in a low frequency range.SOLUTION: A first bushing 10 and a second bushing 20 have a relation of series-connected springs under inputting of vibration in a low frequency region. Since the first bushing 10 has a dynamic spring constant that is set to be lower than a dynamic spring constant of the second bushing 20, it is possible to make a vibration isolator 1 of a low spring type by the first bushing 10. In turn, the first bushing 10 and the second bushing 20 become a relation of parallel-connected springs with a connecting member 30 being applied as a mass component. Since the second bushing 20 is set to have a larger attenuation coefficient than that of the first bushing 10, it is possible to set the vibration isolator 1 to have a high attenuation state. Accordingly, a rigid body resonance can be reduced. |
