| 摘要 |
An electric fan includes a fan base ( 10 ), a bearing ( 40 ), a rotor assembly ( 20 ), and an oil-retaining structure. The fan base forms a center tube ( 11 ) receiving the bearing therein. The rotor assembly includes a fan hub ( 22 ), and a pivot axle ( 23 ) joined to the fan hub. The pivot axle pivotably extends into the bearing. The oil-retaining structure can be pivoted with the rotor assembly. The oil-retaining structure defines an oil slot ( 25 ) surrounding the pivot axle. At least one oil guide rib ( 26 ) is formed in the oil slot. As the fan is operated, the lubricant oil is thrown into the oil slot, and then thrown out of the oil slot along the oil guide rib.
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