Browse Prior Art Database

Contamination Cover of Spindle Motor

IP.com Disclosure Number: IPCOM000112592D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Aoyagi, A: AUTHOR [+3]

Abstract

Disclosed is a structure for spindle motors used in Hard Disk Drives (HDDs). The spindle motor is often supported on both ends to increase the stiffness. The top end of the motor is fixed to a cover by a screw (Fig. 1). The design disclosed here is provided with a cover on the shaft of the spindle motor which protects the bearing and ferro-fluid seal from contamination caused by the screw (Figs. 2 and 3). Particles from the screw will not directly contaminate the ferro-fluid seal or bearing. Particles may be vacuumed or blown away from this contamination cover.

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Contamination Cover of Spindle Motor

      Disclosed is a structure for spindle motors used in Hard Disk
Drives (HDDs).  The spindle motor is often supported on both ends to
increase the stiffness.  The top end of the motor is fixed to a cover
by a screw (Fig. 1).  The design disclosed here is provided with a
cover on the shaft of the spindle motor which protects the bearing
and ferro-fluid seal from contamination caused by the screw (Figs. 2
and 3).  Particles from the screw will not directly contaminate the
ferro-fluid seal or bearing.  Particles may be vacuumed or blown away
from this contamination cover.

      In the usual design, the ferro-fluid seal and bearing are
susceptible to contamination.  Therefore, in assembling or
disassembling the HDD, there is a risk of damaging the spindle motor,
which is one of the most expensive parts in a HDD.  The quality of
the spindle motor will not degrade due to assembling, and salvage
yield can be improved by this structure also.