Axial field motor and method of assembling

• Main Authors: GAN KE, VISKOCHIL STEPHEN RALPH, LIN MING CHOU, ONG ENG TEO, WONG CHIEW LEONG, LIN WUZHONG, LIU MENGJUN
• Format: Patent
• Language: English
• Published: 23.12.2015
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; WEAPONS

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.