| 摘要 |
The adjustable suspension system (20) for cargo vehicles (T) of this invention includes of a caro bed (22), at least two coaxial wheels (26) and an adjustable suspension member (24) equipped wit h a pneumatic system (50). The adjustable suspension member (24) includes a pivotal axle (40) parallel to the wheel axis (A), a rigid plate (46) mounted under to the cargo bed (22), a movable support (42) attached to the pivotal axle (40), an actuating member (44) located between the movable support (42) and the plate (46), lateral arms (32) substantially perpendicular to the axle (40) and attached at one (36) of their extremities to a respective end of the axle (40) and at the other extremity (34) to a spindle (38) connected to each wheel (26). The basic mechanism of these components allows for controlled change of the air pressure in the actuating member (44) to position the cargo bed (22) in a transport or a loading position with greater efficiency and maneuverability while leaving the greatest clearance possible under the cargo bed (22). This adjustable suspension system (20) also enables the pivotal axle (40) to also act as a torsion bar in order to provide greater suspension to the cargo bed (22) and its load.
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