PROBLEM TO BE SOLVED: To improve the straight advancement of a traveling vehicle by a simple structure, to improve the accuracy of the elevation control of a working part by a simple structure, and to stabilize an attitude of the traveling vehicle by a simple structure.SOLUTION: There is provided a traveling vehicle in which right and left front wheels (6) and right and left rear wheels (7) making a vehicle body travel by being grounded are provided, treads of the right and the left front wheels (6) and treads of the right and the left rear wheels (7) are made to be the same, the front wheels (6) are driven at a circumferential speed higher than the circumferential speed of the rear wheels (7), and a groove forming device is constituted that forms grooves in advance on the ground where the rear wheels (7) pass by making the front wheels (6) slip.COPYRIGHT: (C)2013,JPO&INPIT【課題】 本発明は、簡単な構成で走行車両の直進性を向上させることを課題とする。また、簡単な構成で作業部の昇降制御の精度を向上させることを課題とする。また、簡単な構成で走行車両の姿勢を安定させることを課題とする。【解決手段】 接地して機体を走行させる左右の前輪(6)と左右の後輪(7)を設け、左右の前輪(6)のトレッドと左右の後輪(7)のトレッドを同一にすると共に、後輪(7)の周速度よりも速い周速度で前輪(6)を駆動し、前輪(6)をスリップさせて後輪(7)が通過する地面に予め溝を形成する溝形成装置を構成した走行車両とした。【選択図】図1
