| 摘要 |
PROBLEM TO BE SOLVED: To improve a damper which is interposed between a vehicle body and wheels, and attenuates road face vibration inputted to the wheels.SOLUTION: A damper comprises: a damper main body in which a wheel-side tube 2 is inserted into a vehicle body side tube 1 via a pair of vertical bearings 30, 31, the upper-side bearing 30 is attached to an external periphery of the wheel-side tube 2 and the lower-side bearing 31 is attached to an internal periphery of the vehicle body side tube 1, and a lubrication gap 3 is formed between the bearings 30, 31; an air chamber G and a working fluid chamber R which are formed between the damper 4 which is accommodated in the damper main body and the damper main body; a rod guide 6 for partitioning the working fluid chamber R to up-and-down directions (R1, R2); a flow passage L having a check valve 6 which permits only the movement of a working fluid to the lower-side working fluid chamber R2 from the upper-side working fluid chamber R1; and a communication passage 2a which makes the lower-side working fluid chamber R2 and the lubrication gap 3 communicate with each other. The movement of the working fluid to the upper-side working fluid chamber R1 from the lower-side working fluid chamber R2 is prohibited, and a cross section area of the lubrication gap 3 is larger than a cross section area X of a rod 42 of the damper 4. |
