PROBLEM TO BE SOLVED: To provide a harvester capable of compactly arranging at a low cost therein a PTO clutch mechanism functioning to drive a farm-working section at a vehicle speed-synchronous speed and a constant-rotating clutch mechanism functioning to drive the farm-working section at a constant rotating speed.SOLUTION: The harvester has the following construction: a transmission case 26 is arranged with a first variable-speed means 88 for putting engine output to speed variation, a second variable-speed means 89 for putting the output of the first variable-speed means 88, and a third variable-speed means 102 for putting the output of the second variable-speed means 89 so as to transmit the output of an engine 20 via the PTO shaft 94 on the output side of the second variable-speed means 89 to a farm-working section. The inside of the transmission case 26 is installed with a PTO clutch mechanism 110 functioning to drive the farm-working section at a vehicle speed-synchronous speed, and a constant-rotating clutch mechanism 111 functioning to drive the farm-working section at a constant rotating speed, wherein the PTO clutch mechanism 110 is arranged in between the output side of the second variable-speed means 89 and the PTO shaft 94, and the constant-rotating clutch mechanism 111 is arranged in between the input side of the first variable-speed means 88 and the PTO shaft 94.COPYRIGHT: (C)2009,JPO&INPIT【課題】車速同調速度で農作業部を駆動するPTOクラッチ機構と、一定回転速度で農作業部を駆動する一定回転クラッチ機構とを、コンパクトに且つ低コストに配置できる収穫機を提供する。【解決手段】ミッションケース26に、エンジン出力を変速する第1変速手段88と、第1変速手段88の出力を変速する第2変速手段89と、第2変速手段89の出力を変速する第3変速手段102とを配置し、第2変速手段89の出力側のPTO軸94を介して農作業部にエンジン20の出力を伝達し、ミッションケース26の内部に、車速同調速度で前記農作業部を駆動するPTOクラッチ機構110と、一定回転速度で前記農作業部を駆動する一定回転クラッチ機構111とを設け、第2変速手段89の出力側とPTO軸94との間にPTOクラッチ機構110を配置し、第1変速手段88の入力側とPTO軸94との間に前記一定回転クラッチ機構111を配置したものである。【選択図】図4
