To form a constitution of a speed change mechanism compact, to lighten weight and to reduce the number of part items and the amount of lubricating oil, by constituting the speed change mechanism with a small number of shafts.
An HST12 is additionally provided in a transmission case side surface of a cultivator, an output shaft 52 of the HST12 is inserted in a transmission case, a reduction output shaft 53 is relatively rotatably mounted on the HST output shaft, also a pipeshaped reduction final shaft 70 is loosely fitted onto the reduction output shaft 53, gears 53a, 67 are fixedly provided respectively in the reduction output shaft 53 and the reduction final shaft, the gears 53a, 67 are meshed with two gears 66, 65a fixedly provided in a reduction intermediate shaft 6 rotatably laterally mounted in the transmission case, power is transmitted from the reduction output shaft 53 through the reduction intermediate shaft 65 to the final reduction shaft 70, so as to drive a running wheel 1.
TANJI MITSUHIKO
NAKANO MASANORI
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