| 摘要 |
Towing apparatus comprising a towing vehicle and a lifting frame that supports one end of a towed vehicle off the ground and is connected to the towing vehicle through a thrust reversal system, comprising one or more thrust reversal mechanisms, each having a rear lever arm fixed at its rear end portion to the lifting frame, a front lever arm fixed to the main frame of the towing apparatus only at a position forward of a rear wheel axle of the towing vehicle and intermeshing gears, fixed to the rear end portion of the front lever arm and the front end portion of the rear lever arm, respectively. A bracket resting on but not directly connected to the main frame of the towing vehicle near its rear wheel axle holds two pivot rods about which the intermeshing gears are rotatably mounted for simultaneous opposite rotation. This relatively simple structure overcomes the tendency of the load of a wrecked vehicle on the lifting frame to lift the front end of the towing vehicle about a pivot axis defined by a pair of rear wheels mounted on the rear wheel axle of the towing vehicle.
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