| 摘要 |
A double deck trailer comprises a base 2 and a movable upper deck 8. The upper deck 8 is lifted by a plurality of lifting mechanisms 6, 7 such as hydraulic or pneumatic cylinders 15, 18 each comprising a plurality of actuators. Each actuator comprises a rod 14, 20 extendible from a barrel 16. The barrels are arranged side by side and the rods extend in opposite directions to push the upper deck 8 upwards. The lifting mechanism can be compact because the hydraulic cylinders 15, 18 are placed side-by-side. The total extension of the lifting mechanism is at least equal to the retracted length and can be 1.5 times that retracted length. A slide mechanism can be provided where the lift mechanism is coupled to the upper deck to allow the deck to be moved for unbalanced loads. The lifting mechanism can be provided in the trailer legs and used to lift the trailer roof. |
