| 摘要 |
An oil-impregnated bearing combination includes an axle tube whose upper end has an upper cap having an opening is secured in a tight fit manner inside the axle tube hole. After a rotor shaft extends through the opening of the upper cap, a retainer is snapped on the shaft. The retainer is provided with an annular wall protruding outward from the opening of the upper cap and rested on a shaft seat. The outer peripheral of the shaft under the retainer is sleeved with an oil-impregnated bearing, and the oil-impregnated bearing is placed in the inner hole of the axle tube in a non-tight fit manner. The lower end of the axle tube is sealed by a lower cap, so that the oil-impregnated bearing is retained between the upper cap and the lower cap, for supporting rotation of the rotor shaft.
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