PROBLEM TO BE SOLVED: To enhance the operability of linear advancement and turning traveling in a traveling vehicle provided with a shift operation unit of a linear advancement traveling shift device for transmitting motive power to right and left traveling parts for supporting a traveling machine body and a turning operation unit of a turning traveling shift device for transmitting motive power to the right and left traveling parts in reverse rotation.SOLUTION: A control body 81 provided with a circular cam 84 with a turning input shaft as a center on the turning input shaft 72 rotated by the turning operation unit 10 is provided so that it is freely inclination-rotated around an axis of the turning input shaft and a perpendicular axis S extending at a right angle, and the control body is inclination-rotated around the perpendicular axis S while being interlocked with the shift operation unit 13. The linear advancement traveling shift device 25 is shift-operated by a shift slide element member 97 slidably engaged with a portion on a linear line W extending perpendicular to the perpendicular axis S of the circular cum, whereby, the turning traveling shift device is shift-operated by a turning slide element member 106 slidably engaged on a portion on the perpendicular axis S of the circular cam.COPYRIGHT: (C)2009,JPO&INPIT【課題】走行機体を支持する左右の走行部に動力伝達する直進走行用変速装置の変速用操作具と,前記左右の走行部に動力を逆回転伝達する旋回走行用変速装置と旋回用操作具を備えて成る走行車両において,直進及び旋回走行の操作性を向上する。【解決手段】旋回用操作具10にて回転する旋回入力軸72に,当該旋回入力軸を中心とする円形カム84を備えた制御体81を,前記旋回入力軸の軸線と直角に延びる直交軸線Sの回りに自在に傾き回転するように設け,この制御体を前記変速用操作具13に連動して前記直交軸線Sの回りに傾き回転するように構成し,前記円形カムのうち前記直交軸線Sと直角に延びる直線W上の部分に摺動自在に係合する変速用滑り子部材97にて前記直進走行用変速装置25を変速作動する一方,前記円形カムのうち前記直交軸線S上の部分に摺動自在に係合する旋回用滑り子部材106にて前記旋回走行用変速装置を変速作動する。【選択図】図4
