Spindle motor having overmolded stator
AssigneeSeagate Technology LLC
InventorsJohn Charles Dunfield, Gunter Karl Heine
Life of this patent
Estimating the term…
Abstract
A disc drive spindle motor for rotating at least one disc in a data storage device includes a base, a shaft, a rotor and a stator. A bearing interconnects the rotor with the shaft and allows the rotor to rotate about the shaft. An overmold encapsulates at least a portion of the stator and provides the stator with a smooth external surface. The overmold mechanically isolates the stator from the base and damps sympathetic vibrations in the stator structure to reduce the generation of acoustic noise in the storage device.
Claims31
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;
- a resilient, acoustic vibration damping overmold which encapsulates at least a portion of the stator;
- and
- wherein the stator is attached to the base through the resilient, vibration damping overmold such that the overmold inhibits transfer of vibrations between the stator and the base.
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;
- and
- a resilient, acoustic vibration damping material overmolded around at least a portion of the stator and wherein the stator is attached to the base through the overmold such that the overmold inhibits transfer of vibrations between the stator and the base.
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;
- an acoustic vibration damping overmold which encapsulates at least a portion of the stator;
- a film having upper and lower surfaces carrying a pressure sensitive adhesive, wherein the lower surface is adhered to the base;
- and
- wherein the overmold has a lower surface which is adhered to the upper surface of the film.
Dependencies are inferred from the claim text.