| 摘要 |
A cargo hauling system is dimensioned to fit a truck bed or SUV cargo space. The bin moves forwardly and rearwardly relative to the truck bed or cargo space, selectively pivots for dumping the load contents of the bin from the rear of the vehicle, or is selectively removed from the vehicle to leave at a job site, and/or allow the vehicle to be used without the removable bin. A pivot arm assembly advantageously mounted to a conventional trailer hitch receiver installed on vehicles of this type. The pivot arm assembly includes a support bar received within the trailer hitch receiver. A generally U-shaped support structure includes a transverse arm and first and second upright arms extending therefrom having first, lower ends secured to the transverse arm. Rollers are rotatably secured adjacent outer terminal ends of the first and second upright arms, respectively. The rollers cooperate with first and second guide rails secured to an underside of the bin. In addition, roller members are preferably provided along an undersurface of the bin to facilitate rolling movement of relative to the truck bed/cargo space. A loading, unloading ramp assembly is independently and conveniently secured to the pivot arm assembly. Wheels provided adjacent an outer terminal end of a ramp cooperate with a closed loop assembly for selectively loading and unloading the bin from the vehicle along the ramp. By using the motive power of the vehicle, one end of the bin is urged by the closed loop chain along the ramp as driven by the force supplied by the wheels at the terminal end of the ramp. A self-tightening mounting assembly is preferably used to secure the pivot arm assembly to the receiver of the trailer hitch.
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