| 摘要 |
A reversible drive system for a conveyor includes a belt, a drive wheel, and an idler wheel, where the drive wheel and the idler wheel are mounted for rotation on spaced apart axes to define a nip between the drive wheel and the idler wheel, with the belt being pulled through the nip by the rotation of the drive wheel. A first arm extending toward a first direction of travel of the belt is mounted for rotation about a first hinge point and linked to the drive wheel so that rotation of the first arm causes the drive wheel and the idler wheel to move closer to each other, thereby increasing the pinching on the belt passing through the nip, wherein increased tension on the belt causes rotation of the first arm which moves the drive wheel and the idler wheel closer to each other to increase the pinch on the belt. A second arm extends toward a second direction of travel of the belt and is mounted for rotation about a second hinge point and is linked to the drive wheel so that rotation of the second arm causes the drive wheel and the idler wheel to move closer to each other, thereby increasing the pinching on the belt passing through the nip. The first arm acts to prevent slippage of the belt when the belt is traveling in a first direction, and the second arm acts to prevent slippage of the belt when the belt is traveling in a second direction.
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