| 摘要 |
PURPOSE:To prevent a vehicle from generating enveloped noise and shake by constituting a power unit mounting device in such a way that those brackets enclosing resilient members are brought in contact with each other through eack resilient member and fiuid a compressive space, one being able to slide into the other, and thereby the compressive fluid is fed into the fluid space. CONSTITUTION:A high pressure air is fed from a tank 22 to an air space 35. And, thereby, the weight of a power unit is supported directly at peripheral parts of the lower surface of the second resilient member 28 by the first resilient member 31 and also supported by upper parts of the first resilient member 31, which do not touch the second resilient member 28, through the high-pressure air in the air space 35. Against an oscillation of low frequency and large amplitude, a receiving table 13 moves until a stopper 39 abuts on a flange 16 to release the tightness of the air space 35 to reduce the air pressure, lower the supporting power and decrease the amplitude. High frequency oscillation is dumped through the first and second resilient members 28, 31 and the air space 35 and, thereby, it is not conveyed directly to a bracket 30. Thus, shake and enyeloped noise can be prevented. |
