PROBLEM TO BE SOLVED: To provide an engine cooling device of a combine harvester that hardly malfunctions.SOLUTION: A first drive path (D1) for driving a fan support shaft (3) and a generator input shaft (2) from an engine output shaft (1) is provided. A second drive path (D2) for driving from the engine output shaft (1) an auger drive shaft (4) linked with a grain discharge device (93) provided in a grain tank (90) for discharging grains is provided. A normal rotation transmission path (D3) for driving a fan (5) for normal rotation from the engine output shaft (1) is provided, the fan (5) being journaled to the fan support shaft (3) in an idle state. A reverse rotation transmission path (D4) for branching by means of a reverse gear case (6) the rotating power transmitted from the second drive path (D2) to the auger drive shaft (4) and for driving the fan (5) for reverse rotation from the reverse gear case (6) is provided. The transmission of a driving force by the normal rotation transmission path (D3) is shut off and the transmission of the driving force by the reverse rotation transmission path (D4) is connected so as to drive the fan (5) for reverse rotation.COPYRIGHT: (C)2012,JPO&INPIT【課題】作動不良の少ないコンバインのエンジン冷却装置を実現する。【解決手段】エンジン出力軸(1)からファン支持軸(3)及び発電機入力軸(2)を駆動する第一駆動経路(D1)を設け、エンジン出力軸(1)からグレンタンク(90)に備えた穀粒排出用の排出装置(93)に連動したオーガ駆動軸(4)を駆動する第二駆動経路(D2)を設け、エンジン出力軸(1)からファン支持軸(3)に遊転状態で軸支されたファン(5)を正転駆動する正転伝動経路(D3)を設け、第二駆動経路(D2)からオーガ駆動軸(4)へ伝動した回転動力を逆転ギヤケース(6)で分岐させ、逆転ギヤケース(6)からファン(5)を逆転駆動する逆転伝動経路(D4)を設け、正転伝動経路(D3)による駆動力の伝動を遮断して逆転伝動経路(D4)による駆動力の伝動を接続することでファン(5)を逆転駆動する構成とする。【選択図】図1
