| 摘要 |
PROBLEM TO BE SOLVED: To provide a tilling shaft supporting structure which can effectively prevent dusts such as soil from entering into a space where a bearing member for supporting a tilling shaft and a seal member are disposed. SOLUTION: The transmission direction downstream side of a bearing portion having the bearing member and the seal member disposed therein is projected outward than a transmission case for accommodating a transmission mechanism for transmitting a power to the tilling shaft. An extension portion extended in the direction approaching the transmission case is arranged in a connection flange of a tilling final shaft of the tilling shaft supported by the bearing portion through the bearing member and the seal member. A first labyrinth is formed with the outer peripheral surface of the projected portion on the transmission direction downward side in the bearing portion and with the inner peripheral surface of the extension portion. COPYRIGHT: (C)2008,JPO&INPIT
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