PROBLEM TO BE SOLVED: To provide a combine harvester which prevents the abrasion of a belt for rotating a cooling fan, the non-change of the rotation rate of the cooling fan, and the deterioration in the cooling efficiency of the cooling fan.SOLUTION: The combine harvester is characterized by disposing a cooling fan 28 between a radiator 29 and an engine 11, disposing a radiator cover 15 having a dust-preventing net 37 on the outside of the radiator 29, wherein the cooling fan 28 can normally or reversely be rotated by the driving force of the engine 11 through a fan stepless speed variator 33 the fan stepless speed variator 33 is disposed on the outside of the air-blasting range of the cooling fan 28 and the fan stepless speed variator 33 can be switched into a cooling state wherein the cooling fan 28 is normally rotated to blast air from the outside of the machine to the inside of the machine, or a dust-removing state wherein the cooling fan 28 is reversely rotated to blast the air from the inside of the machine to the outside of the machine.COPYRIGHT: (C)2013,JPO&INPIT【課題】冷却用ファンを回転させるベルトの摩耗、冷却用ファンの回転速度の変速ができず、冷却用ファンによる冷却効率が悪化する。【解決手段】ラジエーター29とエンジン11との間に冷却用ファン28を設け、前記ラジエーター29の外側に防塵ネット37を有するラジエーターカバー15を設け、前記冷却用ファン28はエンジン11の駆動力によりファン無段変速装置33を介して正逆可能な構成とし、該ファン無段変速装置33は、前記冷却用ファン28の送風範囲外に設けると共に、該ファン無段変速装置33は、前記冷却用ファン28を機体外部から機体内部方向へ送風するべく正回転駆動する冷却状態と、前記冷却用ファン28を機体内部から機体外部方向へ送風するべく逆回転駆動する除塵状態とに切替自在な構成としたコンバイン。【選択図】図8
