| 摘要 |
A reverse gear device of a combined variable transmission system includes a housing which is mounted on the rear wheel axle of a motor scooter for housing a drive bevel gear, a driven bevel gear, an idle bevel gear, an idle gear shaft, shifting forks, and a sector plate cam. The drive bevel gear and the driven bevel gear are identical in specification to each other and are mounted at two sides of the rear wheel axle on the basis of a toothed cone center. The drive bevel gear and the driven bevel gear are provided with a groove facing the toothed cone center. The drive bevel gear is disposed with the axle by a spline hole. The driven bevel gear is disposed with the axle by a round hole for the power transmission in the forward motion.
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