SEMI-CRAWLER TYPE WORKING VEHICLE

PROBLEM TO BE SOLVED: To provide a semi-crawler type working vehicle capable of simply realizing a constitution for dynamically changing a shape of a crawler part according to the running direction. SOLUTION: A semi-crawler type tractor comprises an output shaft 71, a driving sprocket 52, a supporting case 56, and a transmission gear 53. The output shaft 71 is arranged so as to be projected in the right-to-left direction of a vehicle body in a vicinity of a crawler part 15, and outputs the driving force on an engine side. The supporting case 56 supports the driving sprocket 52 and turnable around the axis of the output shaft 71. The rotation of the output shaft 71 is transmitted to the transmission gear 53, and the driving force is transmitted to the driving sprocket 52 via the transmission gear 53. The crawler part 15 is constituted in a triangular shape with a driving sprocket 52 being an apex in side view. In the advancing mode, the driving sprocket 52 is moved forwardly by using the rotational force of the output shaft 71, and in the retracting mode, the driving sprocket is moved backwardly by using the rotational force of the output shaft 71. COPYRIGHT: (C)2010,JPO&INPIT