Spindle motor and disk drive apparatus
AssigneeNidec Corporation
InventorsTomohiro Yoneda, Takeshi Ohiro, Takayuki Ishino
Life of this patent
Estimating the term…
Abstract
In a spindle motor, a cup portion of a base member includes a cylindrical portion coaxial or substantially coaxial with a central axis extending in a vertical direction and a bottom plate portion defined integrally with the cylindrical portion, and located to close a lower portion of the cylindrical portion. The bearing mechanism is inside of the cup portion and an outer circumferential surface of the bearing mechanism and an inner circumferential surface of the cylindrical portion include a first adhesive layer located therebetween. The base member includes a communicating hole that passes through the bottom plate portion in an axial direction. The communicating hole includes a second adhesive layer located therein.
Claims18
A spindle motor comprising:
- a base;
- a bearing fixed to the base;
- and
- a rotating portion rotatably supported by the bearing;
- wherein
- the base includes a cup portion including:
- a cylindrical portion coaxial or substantially coaxial with a central axis extending in a vertical direction;
- and
- a bottom plate portion defined integrally with the cylindrical portion, and located to close a lower portion of the cylindrical portion;
- the bearing is inside of the cup portion;
- an outer circumferential surface of the bearing and an inner circumferential surface of the cylindrical portion include a first adhesive layer therebetween;
- the base includes a communicating hole that passes through the bottom plate portion in an axial direction;
- and
- the communicating hole includes only a second adhesive layer therein.
A spindle motor comprising:
- a base;
- a bearing fixed to the base;
- and
- a rotating portion rotatably supported by the bearing;
- wherein
- the base includes a cup portion including:
- a cylindrical portion coaxial or substantially coaxial with a central axis extending in a vertical direction;
- and
- a bottom plate portion defined integrally with the cylindrical portion, and located to close a lower portion of the cylindrical portion;
- the bearing is inside of the cup portion;
- an outer circumferential surface of the bearing and an inner circumferential surface of the cylindrical portion include a first adhesive layer therebetween;
- the base includes a plurality of communicating holes that pass through the bottom plate portion in an axial direction;
- and
- the plurality of communicating holes include a second adhesive layer therein.
A spindle motor comprising:
- a base;
- a bearing fixed to the base, the bearing including a sleeve;
- and
- a rotating portion rotatably supported by the bearing;
- wherein
- the base includes a cup portion including:
- a cylindrical portion coaxial or substantially coaxial with a central axis extending in a vertical direction;
- and
- a bottom plate portion defined integrally with the cylindrical portion, and located to close a lower portion of the cylindrical portion;
- the bearing is inside of the cup portion;
- an outer circumferential surface of the bearing and an inner circumferential surface of the cylindrical portion include a first adhesive layer therebetween;
- the base includes a communicating hole that passes through the bottom plate portion in an axial direction at a location radially inward from a radially outer surface of the sleeve;
- and
- the communicating hole includes a second adhesive layer therein.
Dependencies are inferred from the claim text.