PROBLEM TO BE SOLVED: To simplify a mechanism for interlocking and connecting a main shift lever and a steering wheel to an HST mechanism for linear advancement and turning in a traveling vehicle such as a combine capable of performing driving (operation) by operation feeling similar to that of a four-wheel automobile.SOLUTION: A single control body turnable around two axes perpendicular to each other is built-in in a storage box. The control body is constituted so as to be turned around a vertical axis by the operation of the steering wheel and turned around a lateral axis by the operation of the main shift lever. In the storage box, a turning conversion shaft and a linear advancement conversion shaft are pivotally supported so as to be turnable in a state that mutual axes are substantially positioned on the same plane. Furthermore, the body is provided with turning angle sensors 140, 180 for detecting turning amounts of the respective conversion shafts electric motors 141, 181 associated with control shafts of the respective HST mechanisms and a controller 200 for driving the respective electric motors 141, 181 using the detection information of the respective turning angle sensors 140, 180.COPYRIGHT: (C)2010,JPO&INPIT【課題】四輪自動車と同じような操作感覚で運転(操縦)可能なコンバイン等の走行車両において、主変速レバーと操向ハンドルとを直進用及び旋回用HST機構に連動連結するための機構を簡素化する。【解決手段】互いに直交する2つの軸線回りに回動可能な単一の制御体を収容ボックスに内蔵する。制御体は、操向ハンドルの操作にて縦軸線回りに回動し、且つ、主変速レバーの操作にて横軸線回りに回動するように構成する。収容ボックスには、旋回用変換軸と直進用変換軸とを、互いの軸線が実質的に同一平面上に位置した状態で回動可能に軸支する。更に、各変換軸の回動量を検出する回動角センサ140,180と、各HST機構の制御軸に関連させた電動モータ141,181と、各回動角センサ140,180の検出情報を用いて各電動モータ141,181を駆動させるコントローラ200とを備える。【選択図】図20
