US 2010/0246349 A1Published application

Method for manufacturing a storage disk drive motor, motor for driving a storage disk and storage disk drive apparatus provided with the motor

AssigneeNidec Corporation

InventorsHitoshi Takaki, Tatsuya Tatara, Hiroaki Inamori

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Abstract

A storage disk drive motor 12 includes a stator unit 2, a rotor unit 3, a shaft 41 arranged in a coaxial relationship with a center axis 9, a sleeve unit 22 including a flange portion 223, and a base member 21, having a through-hole, fixed to the sleeve unit 22 by caulking. The flange portion 223 includes a flange lower surface 223b making contact with an upper surface 21a of the base member 21 and a jut 24 protruding downwards from a radial inner side of the flange lower surface 223b. The jut 24 includes a first outer circumferential surface 241 opposed to the inner circumferential surface 21c of the base member 21, a second outer circumferential surface 242 positioned below the first outer circumferential surface 241, and a groove 243 radially inwardly indented from the first outer circumferential surface 241 and the second outer circumferential surface 242.

Claims20

Dependent claims

A method for manufacturing a storage disk drive motor, comprising:

providing a base member comprising:
an upper surface;
a lower surface;
and
a through-hole communicating with the upper surface and the lower surface, the through-hole having a circumferential lower corner at a lower end of the through hole;
providing a sleeve unit comprising a flange lower surface and a jut locating at a radially inward side of the flange lower surface, the jut protruding downwards beyond the flange lower surface, wherein the jut has a radially outer circumferential surface comprising:
a first outer circumferential surface;
a second outer circumferential surface positioned below the first outer circumferential surface;
and
a groove positioned between the first outer circumferential surface and the second outer circumferential surface;
inserting the sleeve unit into the through-hole;
contacting the upper surface with the flange lower surface, the jut positioning lower than the circumferential lower corner;
and
plastically deforming the jut radially outwards to contact the lower surface and/or the circumferential lower corner.

11 more elements

A storage disk drive motor, which comprises:

a stator unit;
a rotor unit rotatable with respect to the stator unit, the rotor unit comprising a disk support portion arranged to support a storage disk thereon;
a shaft having a central axis extending vertically;
a sleeve unit comprising a flange lower surface and a jut locating at a radially inward of the flange lower surface, the jut protruding downwards beyond the flange lower surface, wherein the jut has a radially outer circumferential surface comprising:
a first outer circumferential surface;
a second outer circumferential surface positioned below the first outer circumferential surface;
and
a groove positioned between the first outer circumferential surface and the second outer circumferential surface;
a base member comprising an upper surface, a lower surface, a through-hole communicating between the upper surface and the lower surface, and a circumferential lower corner at a lower end of the through-hole,
wherein the jut is inserted into the through-hole,
wherein the flange lower surface contacts the upper surface of the base member,
wherein the jut plastically deformed radially outwards contacts the lower surface and/or the circumferential lower corner of the base member.

9 more elements

Dependencies are inferred from the claim text.