A continuously variable transmission with a centrifugal clutch and a plate clutch

摘要

A transmission system comprises a belt type continuously variable transmission 23, a gearshift transmission 3 and a centrifugal clutch 6 mounted on a first end 221 of an output shaft 22 of the continuously variable transmission 2. A plate clutch 4 is mounted on a second end 222 of the output shaft 22 and is engaged to transfer rotary motion from the output shaft 22 to power output shaft 32 by a gearshift speed-change procedure. When engine speed reaches a certain level the centrifugal clutch 6 engages and power is transferred from the continuously variable transmission 2 to the gearshift transmission 3 and then to rear wheels 11 via the power output shaft 32. If a manual gear-change is required the plate clutch 4 is disengaged and gears in the gearshift transmission 3 are shifted by a gearlever which moves gears 351-354 or gears 361-364 to alter the gear ratio. In another embodiment the plate clutch 4 may be on the same end of the output shaft 22 as the centrifugal clutch 6.