PROBLEM TO BE SOLVED: To provide an inexpensive and high-performance combine harvester easy to undergo maintenance and designed to efficiently make a grain culm charging operation continuously without decreasing the speed of the operation for charging grain culms into a threshing unit or without pausing the operation.SOLUTION: This combine harvester is so designed as to be provided with a reaping treatment speed tuning path 32 functioning to input mechanical power via a transmission unit M into a power transmission path 30 through which mechanical power from a prime mover unit E is transmitted to a reaping unit 4 to change the reaping treatment speed of the reaping unit 4 by tuning with a traveling speed and a path 34 for constant-speed treatment functioning to input mechanical power from the prime mover unit E to make a reaping treatment at a specified reaping treatment speed wherein the path 34 is disposed at a feed chain 14 side and an input unit 72 for inputting mechanical power from the path 34 into the reaping unit 72 is set up inside the feed chain 14.COPYRIGHT: (C)2002,JPO【課題】穀稈の脱穀部への流し込み作業の処理速度を低下させたり、また、流し込み作業を中断させたりすることなく、継続して効率良く穀稈流し込み作業を行え、なおかつメンテナンスが容易な高機能のコンバインを安価に提供する。【解決手段】原動機部Eからの動力を刈取部4へ伝達する動力伝達経路30中にミッション部Mを介して動力を入力し、走行速度に同調させて刈取部4の刈取処理速度を変化させる刈取処理速度同調経路32と、原動機部Eから動力を入力し、所定の刈取処理速度で刈取処理を行う定速処理用経路34を設け、同定速処理用経路34を、フィードチェン14側に配置するとともに、同定速処理用経路34からの動力を刈取部4へ入力する入力部72を、フィードチェン14の内側に配設した。
