| 摘要 |
<p>A slide-rail suspension system for the drive track of a snowmobile is coupled to the chassis by a linking arm unit pivotally attached to a forward anchor axle to follow an arc prescribed by the linking arm unit. A pair of rear spring and shock absorbing units, each includes a bell crank pivotally connected to an aft portion of the slide rail unit with a relatively long arm connected to a fixed rear axle by a slot coupling. The short arms of the bell crank unit are connected by a piston-cylinder shock absorber to the slide rail unit. A preload coil spring encircles the shock absorber. A bump engagement initiates a sliding movement of the long bell crank with the resulting increase in the shock and spring rate to increase the impact absorbing ability. The short crank arm pivots with the force axis becoming perpendicular to shock absorber to increase the spring and shock rates. A front shock assembly includes a bell-crank and shock absorber unit and a pair of separate torsion spring means which also create a variable shock rate and spring rate. The long arm of the bell crank is connected by a sliding coupling to the front pivot axle. The short arm extends upwardly and is coupled to a shock absorber which is secured at the opposite end to the front end of the slide rail unit. The torsion springs are wound about the front axle with a lower spring arm slidably engaging the slide rail unit and an upper spring arm engaging the chassis.</p> |
