| 摘要 |
An all-terrain vehicle driven by endless propulsion tracks. The wheels are sufficiently bouyant to maintain the upper section of the endless track above the water line when the vehicle is fully loaded. A series of generally linear cleat segments project from the outer surface of the endless track and extend substantially across the width of the track. The cleat segments are arranged in a zig-zag pattern about the length of the endless track in order to provide a combination of forward and lateral thrust components as the endless track is rotated about the wheels. The generally longitudinal character of the cleat pattern reduces the chance of mud and loose soil being carried on the cleats to the top portion of the endless track. In one embodiment of the invention, four pneumatic tire wheel assemblies are provided in longitudinally spaced relation along each side of the vehicle and a pair of endless tracks, each trained around two adjacent wheel assemblies, are provided on each side of the vehicle. The endless tracks include a rib along the inner periphery of the track which guides in a circumferential groove in the pneumatic tires of the wheel assemblies. The tension of the endless belts is adjusted by selectively varying the pressure of the pneumatic tires and the belts are precluded from moving laterally on the wheel assemblies by the described groove and rib engagement. A wheel motor drives each endless belt so that the vehicle may continue to be driven even in the event of failure of one of the endless track assemblies on either side of the vehicle.
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