| 摘要 |
In a hydraulic shock absorber, a first oil chamber (R1) around the piston rod (2) and a second oil chamber (R2) on the opposite side are separated by a piston (3). A communicating passage (L) is disposed on the outside of the cylinder (1) to connect the first oil chamber (R1) and the second oil chamber (R2). An elongation damping valve (4) is installed in the communicating passage (L). When the piston (3) performs an elongation stroke, the entire amount of working oil that has flowed out from the first oil chamber (R1) is supplied to the second oil chamber (R2) via the elongation damping valve (4). As a result, the second oil chamber (R2) does not suffer a shortage of working oil and when the piston (3) shifts to the contraction stroke, a response in generation of damping force can be improved.
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