| 摘要 |
PURPOSE:To improve overall operation efficiency and to obtain high transmission efficiency by disposing a V-belt stepless speed change gear and an interlocking type transmission gear side by side between an input shaft and an output shaft, and operating these gears alternatively. CONSTITUTION:The revolution of a crankshaft 1 caused by an engine E of a motorcycle is transmitted to an input shaft 2 of a speed change gear T through a primary speed reducer Rp, and a rear wheel Wr is rotated by rotation of an output shaft 3 suitably changed in speed. In this case, the speed change gear T comprises a V-belt stepless speed change gear Ta and an interlocking type transmission gear Tb which are disposed side by side, wherein either of these gears is operated by an operation selection device comprising clutches C1, C2 to transmit turning torque from the input shaft 2 to the output shaft 3. The stepless speed change gear Ta is adapted to change the speed change ratio between both V-pulleys 8, 9 steplessly by operations of speed change control mechanisms 11, 12, and the transmission gear Tb comprises sprockets 13, 14 coupled to each other by a chain 15. |
