PROBLEM TO BE SOLVED: To provide a support constitution, even when a moment is applied to a radiator fan shaft, suppressing occurrence of vibrations and preventing durability from being impaired, by rationalizing the support constitution of the radiator fan.SOLUTION: A combine-harvester includes a forward belt transmission mechanism 42 forward rotating a radiator fan 60, and a reverse belt transmission mechanism 43 for reversely rotating the radiator fan 60. A plurality of frames, for example, a pair of frames 122a and 122b is disposed. A forward driven pulley 421 of the forward belt transmission mechanism 42, and a reverse driven pulley 431 of the reverse belt transmission mechanism 43 are provided at a drive shaft 60a supported by the pair of frames 122a and 122b. A forward-rotation transmission belt 422 to be laid across the forward driven pulley 421 and a reverse-rotation transmission belt 432 to be laid across the reverse-rotation driven pulley 431 are so disposed that the arrangement directions thereof extend in a longitudinal direction of the pair of frames 122a and 122b.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2019,JPO&INPIT【課題】ラジエータファンの支持構成を合理化してラジエータファン軸にモーメントがかかっても、振動発生を抑制し耐久性を損なわない支持構成を具現化する。【解決手段】 ラジエータファン60を正転させる正転ベルト伝動機構42と、前記ラジエータファン60を逆転させる逆転ベルト伝動機構43とを備え、複数のフレーム、例えば一対のフレーム122a,122bを配置し、前記正転ベルト伝動機構42の正転用被動プーリ421と前記逆転ベルト伝動機構43の逆転用被動プーリ431とを前記一対のフレーム122a,122bに支持された駆動軸60aに設け、前記正転用被動プーリ421に掛け回される正転用伝動ベルト422と、前記逆転用被動プーリ431に掛け回される逆転用伝動ベルト432とを、これらの配置方向が前記一対のフレーム122a,122bの長手方向に沿うよう配置する。【選択図】 図6
