PROBLEM TO BE SOLVED: To solve problem that a mission case greatly spreads out in the front side of a rear axle housing to restrict the installation space of a mid mower deck, when rear wheel interlock is carried out by communicatingly connecting a main transmission shaft to the mission case of the mid mower, therefore, the wheel base becomes large to easily become to have an above-ground floor.;SOLUTION: The main transmission shaft 6 is installed along the longitudinal direction under the step floor 2 of a vehicle body 1 ranging from an engine shaft 3 mounted in the front part to the rear case 5 above one rear side through above the rear axle housing 4, and a rear output shaft 7 pendant from the rear case 5 is interlocked with an input shaft 9 above an HST case 8 arranged in the one rear side of the rear axle housing 4 by putting a belt 10, while a belt 12 is put between the rear central part of the main transmission shaft 6 and a PTO shaft 11 in front of the rear axle housing 4 to interlock the input shaft 15 on a blade shaft 14 in the same side of a mid mower deck 13.;COPYRIGHT: (C)2010,JPO&INPIT
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