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US 2002/0171302 A1Published application
Spindle motor and bearing assembly
OwnerShin-ichi Takayanagiinventor
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OwnerShin-ichi Takayanagiinventor
Estimating the term…
The fixed shaft type spindle motor of the invention has a fixed shaft vertically installed on a base and a rotor hub supported to freely rotate by the fixed shaft through a bearing. The bearing is composed of a compound ball bearing, and a larger diameter portion of a stepped top-form connection member having the larger diameter portion and a smaller diameter portion is fixedly engaged with the upper end of the outer ring of the compound ball bearing. And, the smaller diameter portion of the connection member is fastened to the rotor hub. The rotary shaft type spindle motor has a rotary shaft vertically installed on the rotor hub, in which the rotary shaft is supported to freely rotate on the base through the bearing. The bearing is composed of a compound ball bearing, and the larger diameter portion of the stepped top-form connection member having the larger diameter portion and the smaller diameter portion is fixedly engaged with the lower end of the outer ring of the compound ball bearing. And, the smaller diameter portion of the connection member is fastened to the base. The compound ball bearing, the shaft (the fixed shaft, the rotary shaft), and the connection member may be assembled in advance integrally in one unit, and the compound ball bearing may be replaced by a fluid bearing. The above configuration will enhance the reliability of the run-out accuracy/NRRO, the noises, the acoustic life, and the rigidity etc., of the spindle motor, and reduce the manufacturing cost.
A fixed shaft type spindle motor in which a fixed shaft is vertically installed on a base and a rotor hub is supported to freely rotate by the fixed shaft through a bearing, wherein:
A fixed shaft type spindle motor in which a fixed shaft is vertically installed on a base and a rotor hub is supported to freely rotate by the fixed shaft through a bearing, wherein:
A rotary shaft type spindle motor in which a rotary shaft is vertically installed on a rotor hub and said rotary shaft is supported to freely rotate on a base through a bearing, wherein:
A rotary shaft type spindle motor in which a rotary shaft is vertically installed on a rotor hub and said rotary shaft is supported to freely rotate on a base through a bearing, wherein:
A bearing assembly in which an inner ring of a compound ball bearing with a pressurization applied is fixedly engaged with a shaft, and a larger diameter portion of a stepped top-form connection member having the larger diameter portion and a smaller diameter portion is fixedly engaged with any of ends of an outer ring of said compound ball bearing.
A bearing assembly in which a sleeve of a fluid bearing sheathes a shaft, and a larger diameter portion of a stepped top-form connection member having the larger diameter portion and a smaller diameter portion is fixedly engaged with any of ends of said sleeve.
Dependencies are inferred from the claim text.