PURPOSE: To perform soil tillage well without dashing and slipping. ;CONSTITUTION: An inclined tilling nail drums 14 are arranged on both sides of the center drive case 7 and horizontal tilling nail drums 13 are set on both sides to the extension of tilling shaft 9 fitted to the center driving case. The horizontal tilling nail drums 13 are driven by the positively driving system connected to the main transmission comprising the receiving sprocket and chain 11, while the inclined nail drums 14 are driven by negatively driving system interlocked to the main driving system. In this machine system, a switching gear 17 is set so that the negatively driving system can be made idle and connected to the receiving sprocket 10 and the gear 17 is selectively switched to allow the inclined nail drum 14 to revolve in the reverse direction to that of the horizontal nail drum 13 or in the same direction.;COPYRIGHT: (C)1994,JPO
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