PROBLEM TO BE SOLVED: To provide a combine harvester decreased in irregularity of control accuracy in reaping on low speed travelling, and decreased in hunting and delayed following in reaping on high speed travelling.SOLUTION: A travelling hydrostatic continuously variable transmission 12, and a reaping transferring hydrostatic continuously variable transmission 21 controlling and driving a reaping device 4 synchronized with travelling speed, are equipped. The combine harvester has a controller 60 which outputs the rotation control of the reaping transferring hydrostatic continuously variable transmission 21, when the travelling speed is lower than a predetermined travelling speed, to change the speed of a reaping device 4 synchronized with the travelling speed as the low speed mode, and, when the travelling speed is higher than the predetermined travelling speed, to change the speed of the reaping device 4 synchronized with the travelling speed as the high speed mode.COPYRIGHT: (C)2011,JPO&INPIT【課題】低速走行での刈取作業における制御精度のばらつき低減、高速走行での刈取作業におけるハンチング・追従遅れの低減。【解決手段】走行用静油圧式無段変速装置12と走行速度に同調して刈取装置4を変速駆動する刈取搬送用静油圧式無段変速装置21を設ける。刈取搬送用静油圧式無段変速装置21の回転制御は、車速が所定走行速度より低速のときには、低速モードとして刈取装置4を走行速度に同調させて変速し、車速が所定走行速度より高速のときには、高速モードとして刈取装置4を走行速度に同調させて変速するように制御出力するコントローラ60を設けたことを特徴とするコンバイン。【選択図】図5
