Claims
- 1. A disc drive spindle motor for reducing acoustic noise generated during idle operation of a disc drive, the spindle motor including a rotating hub adapted to support a storage disc and a magnet attached to the rotating hub to form a rotor, the spindle motor comprising:
a stator having a plurality of windings for generating an electromagnetic force to drive the rotor, the stator defining a first cylindrical surface having a predetermined surface area; and a motor mount defining a second cylindrical surface, the second cylindrical surface of the motor mount engaging only a portion of the predetermined surface area of the first cylindrical surface of the stator.
- 2. The spindle motor of claim 1 wherein the second cylindrical surface of the motor mount engages between approximately 50 and 80 percent of the predetermined surface area of the first cylindrical surface of the stator.
- 3. The spindle motor of claim 1 wherein the second cylindrical surface of the motor mount engages between approximately 20 and 50 percent of the predetermined surface area of the first cylindrical surface of the stator.
- 4. The spindle motor of claim 1 wherein the second cylindrical surface of the motor mount engages approximately 50 percent of the predetermined surface area of the first cylindrical surface of the stator.
- 5. The spindle motor of claim 1 wherein:
the rotor extends radially outward from the stator; the first cylindrical surface constitutes an inner surface of the stator; and the second cylindrical surface constitutes an outer surface of the motor mount.
- 6. The spindle motor of claim 5 wherein the motor mount is formed integrally with a base plate of the disc drive.
- 7. The spindle motor of claim 6 wherein an inner cylindrical surface of the motor mount engages a sleeve of a fluid dynamic bearing.
- 8. The spindle motor of claim 1 wherein:
the stator extends radially outside the rotor; the first cylindrical surface constitutes an outer surface of the stator; and the second cylindrical surface constitutes an inner surface of the motor mount.
- 9. The spindle motor of claim 8 wherein the motor mount is formed integrally with a base plate of the disc drive.
- 10. A disc drive comprising:
a base plate; a storage disc; and a spindle motor comprising:
a rotating hub supporting the storage disc, the rotating hub including a magnet to form a rotor for the spindle motor; a stator having a plurality of windings for generating an electromagnetic force to drive the rotor, the stator defining a first cylindrical surface having a predetermined surface area; and a motor mount defining a second cylindrical surface, the second cylindrical surface of the motor mount engaging only a portion of the predetermined surface area of the first cylindrical surface of the stator.
- 11. The disc drive of claim 10 wherein the second cylindrical surface of the motor mount engages between approximately 50 and 80 percent of the predetermined surface area of the first cylindrical surface of the stator.
- 12. The disc drive of claim 10 wherein the second cylindrical surface of the motor mount engages between approximately 20 and 50 percent of the predetermined surface area of the first cylindrical surface of the stator.
- 13. The disc drive of claim 10 wherein the second cylindrical surface of the motor mount engages approximately 50 percent of the predetermined surface area of the first cylindrical surface of the stator.
- 14. The disc drive of claim 10 wherein:
the rotor extends radially outward from the stator; the first cylindrical surface constitutes an inner surface of the stator; and the second cylindrical surface constitutes an outer surface of the motor mount.
- 15. The disc drive of claim 14 wherein the motor mount is formed integrally with the base plate of the disc drive.
- 16. The disc drive of claim 15 wherein:
the spindle motor includes a fluid dynamic bearing that supports the hub for rotation; and an inner cylindrical surface of the motor mount engages a sleeve of the fluid dynamic bearing.
- 17. The disc drive of claim 10 wherein:
the stator extends radially outside the rotor; the first cylindrical surface constitutes an outer surface of the stator; and the second cylindrical surface constitutes an inner surface of the motor mount.
- 18. The disc drive of claim 17 wherein the motor mount is formed integrally with the base plate of the disc drive.
- 19. A disc drive comprising:
a spindle motor having a stator for generating an electromagnetic force to drive a hub that supports a storage disc; and means for reducing transmission of vibrations from the stator to a base plate of the disc drive to reduce acoustic noise during idle operation of the disc drive.
- 20. The disc drive of claim 19 wherein the base plate includes a motor mount having a cylindrical outer surface and the stator defines a cylindrical inner surface for contacting the cylindrical outer surface of the motor mount.
- 21. The disc drive of claim 19 wherein the base plate includes a motor mount having a cylindrical inner surface and the stator defines a cylindrical outer surface for contacting the cylindrical inner surface of the motor mount.
RELATED APPLICATIONS
[0001] This application claims the benefit of priority of U.S. Provisional Patent Application Serial No. 60/237,630 entitled “Methods For Reduction of Drive Idle Sound” filed Oct. 3, 2000.
Provisional Applications (1)
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Number |
Date |
Country |
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60237630 |
Oct 2000 |
US |