Transmission and vehicle provided therewith

摘要

A transmission includes an input shaft which rotates synchronously with a crankshaft, an output shaft, which rotates synchronously with a driving wheel, a shift drum of a rotary type which engages with a shift fork to drive at least one slide gear, and a rotary stopper mechanism including a friction spring frictionally engaged in a circumferential recessed groove provided in an outer periphery of the output shaft, a rocker arm biased by the friction spring toward the shift drum in accordance with rotation of the output shaft, and an engagement recessed portion provided in an outer periphery of the shift drum to restrict rotation of the shift drum through engagement with the rocker arm. Accordingly, cost is reduced as compared to a conventional transmission, and heat generation of the friction spring is minimized.

主权项

1. A transmission comprising:
an input shaft that rotates synchronously with a crankshaft of an engine through an intermediate clutch; an output shaft that rotates synchronously with a driving wheel; a rotary shift drum that engages with a shift fork to drive at least one of a slide gear fitted on the input shaft and a slide gear fitted on the output shaft; and a rotary stopper mechanism including:
a friction spring frictionally engaged in a circumferential recessed groove provided in an outer periphery of the output shaft;a rocker arm biased by the friction spring toward the rotary shift drum in accordance with a rotation of the output shaft; andan engagement recessed portion provided in an outer periphery of the rotary shift drum to restrict rotation of the rotary shift drum through engagement with the rocker arm.