| 摘要 |
PURPOSE:To increase the range of the speed reduction ratio for drivings at a high speed and at a low speed, by transmitting rotation of a drive shaft to a driven shaft after reducing the speed by a sun gear and a planetary gear and then by a V-belt type automatic transmission, and transmitting rotation of the driven shaft to an internal gear. CONSTITUTION:At the time of low-speed driving of an engine 2, a driven shaft 34 is turned by reducing the speed at a high speed reduction ratio of a planetary gear means 22 and also a high speed rection ratio of a V-belt type automatic transmission 100. At the time of high-speed operation of the engine 2, on the other hand, the driven shaft 34 can be turned at a speed substantially equal to the engine speed since the speed reduction ratio of the planetary gear means 22 is decreased, and in addition thereto, the speed reduction ratio of the V-belt type automatic transmission 100 is also decreased. Therefore, it is enabled to extremely increase the range of the speed reduction ratio for operating an engine at a high speed and at a low speed. |
