| 摘要 |
The chassis of a snowmobile is supported at either side thereof by endless tread assemblies which are connected to each other such that as one track assembly is raised, the other lowers and vice versa, thus allowing the chassis to remain vertical while traversing a slope or to permit the chassis to be leaned into a turn for better weight distribution or placement of the center of gravity of the vehicle and to incline the endless tread devices correspondingly inwardly with respect to the turn to obtain a better bite on the snow surface. The suspension mechanism also operates to couple the prime mover which is mounted on the chassis to the drive sprockets of the endless tread devices. Each track assembly includes an elongate frame mounting a drive sprocket at its rear end and an idler sprocket at its forward end, over which sprocket an endless tread member is trained and each further includes a forward extension projecting beyond the endless track member and which carries a ski at its forward extremity, the skis "feeling" the terrain ahead of the endless treads tending to "telegraph" variations in terrain to the tread assemblies while also accommodating for steering action of the vehicle.
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