| 摘要 |
<p>A suspension unit, for example for a track-laying vehicle, comprises an oil-filled cylinder (4) within which a piston (8), connected to a piston rod (26), is provided. The cylinder (4) is oil-filled, and communicates with an upper region (14) of a spring chamber (6), the lower region (46) of which contains gas under pressure. The piston rod (26) has a hollow interior (24) filled with gas under pressure. The piston 8 is connected by a connecting rod (20) to a secondary piston (22) which is slidable within the piston rod (26). On rebound (Figure 1) the piston rod (26) and the piston 8 move relatively to each other between a retracted end position and an extended end position. During this movement and the return movement, oil is transferred, via apertures (40, 42), between damping chambers (38, 44) which serve to damp the relative movement of the piston (8) and the piston rod (26) so avoiding shock loading at the end positions of the movement.</p> |
