| 摘要 |
A three-wheeled motorcycle for use on rough terrain has a main frame and a front guide wheel pivotally mounted thereto. A pair of linkage arms are pivotally mounted at front ends to an intermediate point on the main frame. Rear ends of these arms pivotally support a wheel support frame including a pair of parallel spaced-apart bolsters. Two rear wheels are tandem mounted between the bolsters, the axle carrying the forward wheel of the pair forming the pivot for the connection between the arms and the bolsters, and the axle for the rear wheel of the pair being carried in bearings at rear ends of the bolsters. A pair of parallel, substantially vertical main frame support links are pivotally mounted to the wheel support frame at the bolsters one-third of the bolster length from the rear thereof and are pivotally mounted to the main frame substantially directly above the connection to the wheel support frame. A positive chain drive is provided from sprockets pivotally mounted concentrically with the mounting point of the linkage arms to the main frame to sprockets driving on said wheel axles. Means is provided for limiting downward pivotal movement of the linkage arms during steep hill climbing use of the vehicle on rough terrain.
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