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Integral Retainer/Seal/Labyrinth Design for Spindle Bearing Cartridge

IP.com Disclosure Number: IPCOM000113127D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 84K

Publishing Venue

IBM

Related People

Boutaghou, ZE: AUTHOR

Abstract

Disclosed is a concept for an integral retainer/seal/labyrinth for the disk spindle bearing in disk drives.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 55% of the total text.

Integral Retainer/Seal/Labyrinth Design for Spindle Bearing Cartridge

      Disclosed is a concept for an integral retainer/seal/labyrinth
for the disk spindle bearing in disk drives.

      In order to maximize the ball size in a ball bearing of a
spindle or actuator in a miniature disk drive, it is necessary to
integrate the ball retainer and the seal into one integral
retainer/seal/labyrinth design.  In miniature disk drives, the low
peripheral velocity of the ball and the small size of the ball tends
to create low grease perturbation and low pressure differential
between the lower and upper cavities of the bearing yielding a
contamination free environment.  The goal is to maximize the width of
a ball bearing assembly to increase its static load capacity while
matching the sealing performance of a labyrinth seal.

      Typically the width of a ball bearing is determined by the ball
size, the ball retainer size and materials, the seal design and
materials, the attachment wire for the seal onto the outer race, the
groove size to locate the seal onto the outer race, and the clearance
between seal and retainer (Fig. 1).

      The present solution combines the function of a retainer, a
seal and a labyrinth into one integral retainer/seal/labyrinth
design.  The retainer/seal/labyrinth design eliminates three parts in
the bearing design, the attachment wire for the seal to the outer
race, the groove to attach the seal to the outer race, and the
clearance be...