Spindle motor and bearing assembly
AssigneeMinebea Co., Ltd.
InventorShin-ichi Takayanagi
Life of this patent
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Abstract
The fixed shaft type spindle motor of the invention has a fixed shaft extending from a base and a rotor hub rotatably supported thereon through a bearing. Where the bearing is a compound ball bearing, a larger diameter portion of a stepped connection member is fixed within the upper end of the outer ring of the compound ball bearing and a smaller diameter portion of the connection member is fixed to the rotor hub. The rotary shaft type spindle motor has a rotary shaft extending within the rotor hub, and the rotary shaft is rotatably supported through the bearing, with the larger diameter portion of the connection member fixed within the lower end of the outer ring of the compound ball bearing and the smaller diameter portion of the connection member fixed to the base.
Claims9
A fluid bearing assembly comprising:
- a sleeve sheathing a shaft;
- a cylindrical connector having an outer cylindrical surface which is stepped to form a first diameter portion and a second diameter portion having a diameter smaller than said first diameter portion, one of said first and second diameter portions being fixed to said sleeve;
- and
- a member having an aperture receiving and fixing the other of said first and second diameter portions, to provide for relative rotation between said member and said shaft.
Dependencies are inferred from the claim text.