| 摘要 |
An automatic cover system for open top containers includes a pair of tubular base frames fixedly connected to the truck frame having a main arm pivotally connected thereto. The main arm includes an extension extending into the base frame. A lower hydraulic actuator is disposed in the interior of the base unit and pivotally connected to the extension. The main arm is pivotal between a forward stop position and a rearward stop position. During movement between the stop positions, a relatively constant lever arm is established minimizing load fluctuations at the pivot connection. The upper end of the main arm is pivotally connected to the lower end of an extension arm. The extension arm includes an extension projecting below the main arm. An upper hydraulic actuator is mounted below the main arm and connected to the extension. The upper ends of the extension arms are operatively connected with a cover rolling system normally disposed on standards mounted at the forward end of the chassis in front of the container. By selectively actuating the cylinders, the arms may be cojointly moved above the front end of containers of varying heights, and rearwardly traversed to the rear of the container of varying lengths for overlying the open end of the container.
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