| 摘要 |
PROBLEM TO BE SOLVED: To make an auxiliary wheel effectively function in relation to a crawler besides the machine body tilt prevention function, in a farm field travel work vehicle for respectively providing the auxiliary wheel on the left-right outsides of the crawler, by using the crawler of only one row in a substantially central position of the work vehicle as a travel device.SOLUTION: A crawler 12 of only one row is used as a travel device of a work vehicle, and left-right auxiliary wheels 61 and 61 are provided on the left-right outsides of the crawler 12, and while, the respective auxiliary wheels 61, a grounding wheel 62 contacting with the ground surface in an axial directional outside position and a band body sliding contact wheel 63 slidingly contacting with an upper surface 13a of an under surface travel part of an elastic band body 13 of the crawler in an axial directional inside position, are installed on a common shaft 64 in a corotation state of both wheels 62 and 63, and the respective auxiliary wheels 61 and 61 are made to effectively function by making the grounding wheel 62 corotate with the band body sliding contact wheel 63 when the band body sliding contact wheel 63 rotates by slidingly contacting with the upper surface 13a of the under surface travel part of the elastic band body 13. |
