Stator ring mass/stiffener for improved acoustics
AssigneeSeagate Technology LLC
InventorsTroy M. Herndon, Jeffry A. LeBlanc, Robert A. Nottingham
Life of this patent
Estimating the term…
Abstract
A disc drive spindle motor having improved acoustic properties for use in a disc drive data storage system is provided. In one embodiment, the disc drive spindle motor a base, a stationary member, a rotor and a stator. A bearing interconnects the rotor with the stationary member and allows the rotor to rotate about the stationary member. The stator includes a plurality of teeth extending from a back iron. At least one stiffening member is coupled to the stator, joining the teeth at an end opposite the back iron. The stiffening member substantially reduces vibrations in the stator thereby reducing acoustic noise generated by the motor.
Claims24
A disc drive spindle motor for rotating at least one disc about a central axis in a storage device, comprising:
- a base;
- a stationary member attached to the base;
- a hub comprising a rotor and a disc carrying member, wherein the hub is rotatable about the central axis with respect to the stationary member;
- a bearing interconnecting the hub with the stationary member;
- a stator coaxial with the rotor and including an annular support member and a plurality of teeth extending from the annular support member to an end;
- and
- at least one rigid stiffening member coupling the ends of two or more of the teeth and supported by the teeth independent of the base and stationary member of the disc drive.
A disc drive spindle, comprising:
- a base;
- a stationary member attached to the base;
- a hub comprising a rotor and a disc carrying member, wherein the hub is rotatable about the central axis with respect to the stationary member;
- a bearing interconnecting the hub with the stationary member;
- a stator coaxial with the rotor and including an annular support member and a plurality of teeth extending from the annular support member to an end;
- a winding disposed on each of the teeth;
- and
- a stiffening means coupled between the ends of two or more of the teeth for tuning the teeth against vibration-induced acoustics.
A disc drive data storage system, comprising:
- a housing having a base;
- a central axis;
- a stationary member attached to the base and coaxial with the central axis;
- a rotatable member which is rotatable with respect to the stationary member;
- a bearing interconnecting the rotatable member with the stationary member;
- at least one data storage disc attached to and coaxial with the rotatable member;
- a stator coaxial with the rotatable member;
- the stator including an annular support member and a plurality of teeth extending from the annular support member to an end;
- and
- at least a first annular stiffening member independent of the base and the stationary members bonded between the ends of at least two or more of the teeth.
Dependencies are inferred from the claim text.