| 摘要 |
A tow truck of the wheel-lift type is provided. In a first embodiment, a telescopic boom is supported by parallelogram linkage which is actuated by a hydraulic motor which is slightly inclined to the horizontal, the inner end of the boom, is its travel position being above and somewhat forwardly of the ring gear housing of the rear axle of the tow truck. The parallelogram linkage supports the boom through a boom support structure which permits it to be swung in a substantially horizontal plane, about substantially vertical pinions. The grid, which engages the wheels, includes a movable member which engages a wheel and raises it relative to the boom and grid, without movement of the boom. In a second embodiment, a substantially vertical post supports a parallelogram linkage which in turn supports a substantially horizontal extensible boom having a wheel grid at its outer end.
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