Motor cycle gear change mechanism - has selector forks mounted on mainshaft together with fixed and sliding gearwheels

摘要

In mesh with the fixed gearwheels are gear change wheels that select the particular clutch for the output shaft drive required. The output shaft has a series of smooth bearing surfaces and the rims have small forks to contact the sliding wheels to move axially along the bearing surfaces. The wheels can be coupled and acted on by a double fork, fixed by a special mounting to the kick start cross shaft. The input shaft is designed as a step wheel shaft. The radial profile of the forks on the output shaft is an involute curve.