Hard disk drive spindle motor including a base and a base insert formed from different materials
US9472234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2013 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Oct 14, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An axial field motor and a method of assembling the motor are provided. The hard disk drive includes a spindle motor having a fluid dynamic bearing (FDB) motor hub, a hard disk drive housing and a base insert. The hard disk drive housing houses the spindle motor therewithin and has an upper housing and a base, the base including a first material. The base insert has ferromagnetic properties, includes a second material and has a flat circular bottom portion and an outer circumferential vertical portion. The flat circular bottom portion of the base insert is located between the FDB motor hub and the base to enhance yield strength therebetween and a bottom portion of the FDB motor hub is surrounded by the outer circumferential vertical portion of the base insert to generate preload for the FDB motor hub.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.