PROBLEM TO BE SOLVED: To provide a pre-processing part driving structure of a combine in which a pre-processing part HST, a pre-processing part transmission and a trunnion shaft driving mechanism can be placed in the compact manner at the front of a front side wall of a thresher part so as to secure a wide maintenance space.SOLUTION: In the combine in which the pre-processing part 11 and the thresher part 3 are provided in the front and rear direction of a driving machine table 10 having a driving device 1a, a manipulation part 13 and an engine 14 are arranged on the other side so that the driving device 1a and the pre- processing part 11 is well as the thresher part 3 are driven from the engine 14, the pre-processing part HST 20 for driving the pre-processing part 11 capable of transmission and a pre-processing transmission 2a are arranged close to the side of the front side wall 36 of the thresher part 3 within a space part H formed between the preprocessing part 11 and the thresher part 3, and a trunnion shaft driving mechanism 5 for operating a trunnion shaft 53 of the pre-processing part HST 20 is made into a pre-processing part driving structure of the combine placed at the front of the pre-processing part HST 20.COPYRIGHT: (C)2003,JPO【課題】 脱穀部の前側壁の前側に、前処理部HSTと前処理部トランスミッション及びトラニオン軸駆動機構をコンパクト纏めて設置でき、広いメンテナンスペースを確保することができるコンバインの前処理部駆動構造を提供する。【解決手段】 走行装置1aを有する走行機台10に前処理部11と脱穀部3を前後方向に設け、他側に操縦部13及びエンジン14を配置し、エンジン14から走行装置1a及び前処理部11並びに脱穀部3を駆動するようにしたコンバインにおいて、前記前処理部11を変速可能に駆動する前処理部HST20と前処理部トランスミッション2aを、前処理部11と脱穀部3間に形成される空間部H内で、脱穀部3の前側壁36側に近接させて配設すると共に、前処理部HST20のトラニオン軸53を作動せしめるトラニオン軸駆動機構5を、前処理部HST20の前側に設置したコンバインの前処理部駆動構造にしている。
