| 摘要 |
PURPOSE:To make a high speed securable even in making an engine have its speed in reserve without rotating the engine at high speed, by installing built-in overdrive mechanism, which secures such a speed as corresponding to a total engine speed, in a driving system transmission. CONSTITUTION:Speed power in an engine 1 is free of speed shift in a driving system transmission 3 and a PTO system transmission 4 via a clutch 2. The driving system transmission 3 consists of a main transmission mechanism 5 capable of four-step speed gears and back gears, an auxiliary transmission mechanism 6 being free of high-low selection and a creep transmission mechanism 7 being free of high-low selection as well, and an output shaft of this transmission mechanism 7 is interlocked with a rear wheel differential mechanism 8. Furthermore, an overdrive mechanism 26 is installed, making full use of an intermediate shaft 15 and a drive shaft 20, whereby such a speed as corresponding to a total engine speed of the engine is securable at a speed range excellent in fuel consumption efficiency and lower than the total engine speed as somewhere around idling revolution. |
