| 摘要 |
A shock absorber adapted to be mounted between a body and a wheel shaft in a vehicle such as a car or a motorcycle for reducing shocks and vibrations derived from a road. The shock absorber includes a subcylinder mounted in a cylinder at one end thereof, a rebound cushion mounted in the sub-cylinder at one end thereof, and an oil-lock piston mounted on a piston rod of the cylinder in confronting relation to the interior of the sub-cylinder. As the piston approaches the end of the expanding stroke, the oil-lock piston is fitted in the sub cylinder, at which time oil in the sub-cylinder is compressed and then flows into an oil chamber below the oil-lock piston via an annular gap around a periphery of the oil-lock piston and a small-diameter hole in the oillock piston. Due to the flow resistance of the small-diameter hole, an oil-lock load can be obtained. As the piston arrives at the end of the expanding stroke, the oil-lock piston abuts against the rebound cushion so as to keep a bearing at a head of the cylinder from violent impacts. |
