PROBLEM TO BE SOLVED: To solve the problem of a conventional combine harvester in which, although the powered rotation of a reaping input shaft is limited in one direction with a pawl type one-way clutch to avoid the trouble of tines or the like by their reverse rotations, the one-way clutch has low durability because of being built in a pulley or the like, and further to solve the problem of the conventional combine harvester whose engine is fixed to a chassis through vibration-proof elastomer members to reduce vibrations and noises but is contrarily largely vibrated or makes large noises in dependence on the direction of outer loads applied to the output shaft of the engine.SOLUTION: This combine harvester having a counter case 64 for changing and controlling a power from the engine 35 or the like and transmitting the power to the treating systems of a reaping section and the like, respectively, and having a vehicle speed-synchronizing input shaft portion 62 in the counter case 64 is characterized by disposing the pawl type one-way clutch 159 in the vehicle speed-synchronizing input shaft portion 62 and further more enhancing the elastic constant of vibration-proof members 89, 90 on the side of a fly wheel 59 disposed in the belt-driving portion of the engine 35 than that of the vibration-proof members 87, 88 on the side of a drive shaft 63.COPYRIGHT: (C)2003,JPO【課題】 従来のコンバインでは、刈取入力軸への動力の回転は、タイン等の逆転駆動によるトラブルを回避すべく、爪式のワンウェイクラッチで一方向に規制されているが、プーリ等に内蔵されていたため耐久性が低い、という問題があった。又、エンジンは、弾性体の防振部材を介して車台上に固設することで振動や騒音を低減しているが、エンジンの出力軸にかかる外部からの荷重方向如何によっては、かえって振動や騒音が大きくなる、という問題があった。【解決手段】 エンジン35等からの動力を変速・制御して刈取部等の各処理系に伝達するカウンターケース64を具備し、該カウンターケース64に設けた車速同調入力軸部62に爪式のワンウェイクラッチ159を設け、更にエンジン35のベルト駆動部を設けたフライホイール59側の防振部材89・90の弾性定数を、ドライブシャフト63側の防振部材87・88よりも高く構成した。
