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Disc drive spindle motor having tuned stator with adhesive grooves
| Details |
Inventors: Pelstring, Robert M.;
Assignee: Seagate Technology, Inc. (Scotts Valley, CA)
Primary Examiner: Evans; Jefferson
Assistant Examiner:
Attorney, Agent or Firm: Westman, Champlin & Kelly, P.A.
A disc drive spindle motor includes a central axis, a stationary member, a rotatable member which is rotatable with respect to the stationary member and a bearing interconnecting the rotatable member with the stationary member. A data storage disc is attached to the rotatable member. A stator is supported by the stationary member at an interface for rotating the rotatable member about the central axis with a driving force frequency. The stator has a resonant vibrational frequency. The interface has a plurality of recesses which are spaced axially from one another with respect to the central axis. An adhesive is applied within a selected set of the plurality of recesses and forms a bond between the stator and the stationary member. The set of recesses is selected such that the resonant vibrational frequency is different than the driving force frequency. |
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DETAILED DESCRIPTION One aspect of the present invention relates to a method of mounting a stator, which has a resonant vibrational frequency, to a stationary member in a disc drive spindle motor.
The method includes: providing a plurality of recesses in an interface between the stator and the stationary member; selecting a set of the plurality of recesses as a function of the resonant vibrational frequency; and placing an adhesive in the selected set of recesses to form a bond between the stator and the stationary member.
Another aspect of the present invention relates to a method of mounting the stator to the stationary member, which includes bonding the stator to the stationary member with a selected bond geometry such that the stator and the stationary member have a selected vibrational resonant frequency.
Another aspect of the present invention relates to a disc drive spindle motor.
The spindle motor includes a central axis, a stationary member, a rotatable member which is rotatable with respect to the e stationary member and a bearing interconnecting the rotatable member with the stationary member.
A data storage disc is attached to the rotatable member.
A stator is supported by the stationary member at an interface.
The stator rotates the rotatable member about the central axis with a driving force frequency and has a resonant vibrational frequency.
The interface has a plurality of recesses which are spaced axially from one another with respect to the central axis.
An adhesive is applied within a selected set of the plurality of recesses and forms a bond between the stator and the stationary member.
The set of recesses is selected such that the resonant vibrational frequency is different than the driving force frequency.
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