| 摘要 |
The cylinder of a shock absorber is spacedly enveloped by a coaxial, axially substantially coextensive cylindrical outer shell. A piston in the cylinder carries a piston rod which passes in sealing engagement through an annular first axial end wall of the cylinder and the shell. The cylinder cavity and the annular chamber between shell and cylinder are connected near the second imperforate axial end wall of the shock absorber which is below the annular wall in the normal operating position. A resilient sleeve in the chamber seals the cylinder to the first end wall and serves as a check valve on bore, in the cylinder for radially outward flow of gas. A compressed gas cushion occupies the upper portion of the chamber. The remainder of the chamber, the cylinder cavity, and axial throttling passages in the piston are filled with liquid. Gas reaching the cylinder cavity is quickly returned to the chamber through the check valve during operation of the shock absorber. |
