Steering apparatus for four-wheeled vehicle

Abstract

A steering apparatus for a four-wheeled vehicle transmits a steering force through a steering shaft, a spur gear type reduction gear mechanism, a steering lever and right and left tie rods to right and left knuckles. The reduction gear mechanism includes a pinion gear formed integrally with a pinion shaft, a steering gear mounted on a lever shaft which is combined with the steering lever, and a gear case housing the pinion gear and the steering gear. The steering gear has internal teeth which are engaged with the pinion gear. The lever shaft has a first end portion supported in a bearing held on the gear case. The bearing permits the lever shaft to be turned therein. The lever shaft also has a second end portion supported in a bearing hole. The bearing hole is elongated along the back-and-forth direction so that the second end portion of the lever shaft is able to be shifted along the back-and-forth direction. The second end portion of the lever shaft is biased by a spring so as to press the internal teeth against the pinion gear so that backlash between the pinion gear and the steering gear is eliminated.

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