| 摘要 |
PURPOSE:To make the direction of motion of a belt in a belt type continuously variable transmission unaltered between forward and backward running phases and as well to aim at enhancing the durability of the belt, by providing a double-planetary gear mechanism in the power transmission path of the engine on the drive wheel side of the belt type continuously variable transmission. CONSTITUTION:A fluid coupling 10 is provided coaxially with the crank shaft of an engine, and a belt type continuously variable transmission is provided with an input shaft 16 coaxial with the fluid coupling 10 and an output shaft 18 extending in parallel with the input shaft 16. Further, a planetary gear mechanism 40 including a double-planetary gear type planetary gear device, is provided coaxially with the output shaft 18. The transmission of engine power to drive wheels is caried out through axles 70, 72 which extends from a differential gear unit 60 in parallel with the output shaft 18. With this arrangement, the planetary gear mechanism for reversing rotation is arranged in the rear stage side of the continuously variable transmission, and therefore, the direction of motion of the belt will not alter between the forward and backward running phases. |
