| 摘要 |
PURPOSE:To miniaturize a speed changing shift device and also a driving direction selecting shift device, by composing a driving device in a way of installing a main clutch at the transmission upper side of a driving direction selecting mechanism at the transmission lower side of a power transmission interlocked with an engine. CONSTITUTION:The power of an engine E is made up so as to be transmitted to a main speed change gear mechanism 1, a hydraulic multiple disc clutch 2, an auxiliary speed change gear mechanism 3 and a super reduction gear mechanism 4 in a transmission case M in order as their setup, and also inside the transmission case M, power out of the upper side of the main speed change gear mechanism 1 is made up so as to be transmitted to an operating gear device and a PTO shaft 12 via a PTO speed change gear mechanism 10 and a hydraulic multiple disc clutch 11. And, two sets of synchromesh type shift devices 17a and 17b are solidly coupled with a PTO system driven shaft S7 and composed of making its four-speed changes performable. With this, not only shift force can be made smaller but also a shift device for speed change and driving direction selection can be miniaturized. |
