| 摘要 |
PROBLEM TO BE SOLVED: To make a compact driving transmission for an agricultural vehicle by linking the center gear through a steering clutch to the driving unit drive gear, and by operating the steering clutch with hydraulic pistons. SOLUTION: A shaft 28 of a center gear 26 is linked so that it rotates as an integrated unit with the center gear 26. A steering clutch 30a is configured by clutch bodies 31, 32. The clutch body 31 is provided in the shaft portion, positioned at the opposite side of the center gear 26 with respect to the driving unit drive gear 12a of the shaft 28. The clutch body 32a is provided at the end part of a transmission gear body 32 which envelops and slides freely with respect to the shaft 28 while engaged with the driving unit drive gear 12a. A hydraulic piston Pa, which is positioned on the opposite side of the center gear 26 with respect to the driving unit drive gear 12a, is slidably operated, thereby a transmission gear body 32 is engaged and disengaged by the steering clutch 30a.
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