| 摘要 |
A twin-pipe shock absorber comprises a disc (7) which is fitted between the piston (4) and the bottom plate (6) inside the working cylinder and which is provided with one or more bores (17), a non-return upflow valve (19) for regulation of the upgoing flow through the bores (17) in the disc (7), a central pipe (8) extending through the piston (4) in the hollow piston rod (5) and through the disc (7), a regulated first damper valve (34) fitted at the bottom end of the working cylinder, and a regulating mechanism fitted below the first damper valve (34) in order to regulate the flow resistance caused by the above-mentioned first damper valve. In order to let the shock absorber function well at very high piston speeds without limitations regarding the dimension of piston and piston rod, the first damper valve (34) is intended purely for damping of the inward stroke of the piston rod (5), whereas a regulated second damper valve (12, 12a) is fitted in the piston (4) for the purpose of damping the outward stroke of the piston rod (5), and the regulating pressure for the second damper valve (12, 12a) is governed by means of the central pipe (8) of low cross-sectional area by the regulating mechanism. |
