To provide a PTO gear shift mechanism of simple structure by using an input shaft and a traveling output distributor shaft to be axially installed in a transmission case.
An input shaft 62, a gear shift shaft 66 linked to the input shaft 62, a traveling output distributor shaft 68 which is linked to the gear shaft 66 and drives front/rear wheels 12 and 14 through front/rear output shafts 58 and 60 and a working machine output shaft 54 which is linked to the traveling output distributor shaft 68 or an input shaft 62 and outputs the driving force of a sprinkling apparatus 30 are rotatably and axially installed in a transmission case 28. The working machine output shaft 54 is equipped with a clutch mechanism 72, a slip gear 73 linked to the input shaft 62 and a slip gear 75 linked to the traveling output distributor shaft 68. The working machine output shaft 54 is engaged with either the slip gear 73 or 75 by the clutch mechanism 72 so that the working machine shaft 54 can be rotated in the number of revolutions proportional to the number of revolutions of an engine or wheels.
MISHIMA TOMOTAKA
TANAKA SHUJI
