Browse Prior Art Database

Disk Stack Clamping Means

IP.com Disclosure Number: IPCOM000100713D
Original Publication Date: 1990-May-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 3 page(s) / 80K

Publishing Venue

IBM

Related People

Reidenbach, JR: AUTHOR

Abstract

The figures illustrate an inversion of a usual method of clamping a stack of disks to a spindle hub of a disk drive. Resilient spacer rings provide necessary axial loading for disk clamping. This is in marked contrast to a conventional method where a stack of disks are axially clamped by use of a resilient top clamping ring and then spaced apart by use of rigid spacer rings.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 57% of the total text.

Disk Stack Clamping Means

       The figures illustrate an inversion of a usual method of
clamping a stack of disks to a spindle hub of a disk drive. Resilient
spacer rings provide necessary axial loading for disk clamping.  This
is in marked contrast to a conventional method where a stack of disks
are axially clamped by use of a resilient top clamping ring and then
spaced apart by use of rigid spacer rings.

      Fig. 1A illustrates an elastomeric material, such as a properly
formulated and configured O-ring for example, that is fitted between
a pair of grooved rings to form a compressible spacer ring.  When
placed between adjacent disks and sufficiently compressed within a
stack assembly, as shown in Fig. 1B, such spacer rings provide axial
loading for disk clamping.  Any number of materials, configurations,
or geometrical shapes could be shown to be satisfactory as long as a
sufficient and consistent load is maintained against each pair of
disks to restrict any relative motion between the hub and the disks.

      Two hub configurations are illustrated in Figs. 2 and 3 to
demonstrate the application of compressible spacer rings. Fig. 2A
shows a flanged hub that is segmented into four identical and
symmetrical parts.  The segments are mated to a set of disks and
rings that are initially stacked and compressed.  Insertions of the
first three segments are trivial; however, insertion of the fourth
segment is accomplished by first butting the outer two segm...