| 摘要 |
PROBLEM TO BE SOLVED: To provide a supporting structure of a rotor shaft of a simple structure designed to effectively prevent penetration of dust such as soil into an installation space of a bearing member and an oil-sealing member for liquidtightly supporting the rotor shaft. SOLUTION: The supporting structure 100 of the rotor shaft 110 equipped with a tillage final shaft 111 having a shaft body 111a and a connecting flange 111b and a tillage tine shaft 112 is provided with a first dust cover 130 for shielding and closing the installation space P of the bearing member 410 and the oil-sealing member 420 from the exterior and a second dust cover 140 for shielding and closing the first dust cover 130 from the exterior in such a state in which a space Q is present around the first dust cover 130. A hole 140a for communicating the exterior and interior is formed in the second dust cover 140. COPYRIGHT: (C)2008,JPO&INPIT
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