| 摘要 |
PURPOSE:To improve vibrationproof characteristic by having an inside inner cylinder member and a connection member worked as weight materials, so as to achieve vibrationproof of a high frequency region, and by reducing the diameter of the connection member, so as to increase the resonance frequency of a bracket on an engine side. CONSTITUTION:A cylinder member 2 is fixed to a bracket 1 on an engine side, and a ringged elastic body 4 is fixed to the inner surface of the cylinder member 2, while the central hole of the ringged elastic body 4 is fixed to a connection member 6, and is press-fitted into the cyilnder member 2. Inside inner cylinder members (inner cylinders) 10a, 10b are inserted into and fixed to both sides of the connection member 6, and ringed elastic members 8a, 8b are fixed to the outer peripheral suface thereof, while outer cylinders 11a, 11b are fixed to the outer peripheral surafce thereof. Since the inner cylinders 10a 10b as well as the connection member 6 are worked as weight materials, and are resonated at a low frequency, the vibrationproofing effect in a high frequency region is improved. Since the diameters of the connection member 6 and of the cylinder member 2 are small, the swing resonance frequency of the bracket 1 is increased, while a vibration transmission level is reduced, and a vibrationproofing characteristic is thus improved. |
