Browse Prior Art Database

O-Ring Clamping Spindle Motor

IP.com Disclosure Number: IPCOM000111388D
Original Publication Date: 1994-Feb-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Sugiiura, A: AUTHOR [+2]

Abstract

Disclosed is a clamping device for a spindle motor disk stack in a storage device (such as a magnetic hard disk). Clamping force provided by the O-ring has some advantages over traditional screw fasteners. This disclosed O-ring provides an uniform clamping force and simple assembling and disassembling of the component on manufacturing line.

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O-Ring Clamping Spindle Motor

      Disclosed is a clamping device for a spindle motor disk stack
in a storage device (such as a magnetic hard disk).  Clamping force
provided by the O-ring has some advantages over traditional screw
fasteners.  This disclosed O-ring provides an uniform clamping force
and simple assembling and disassembling of the component on
manufacturing line.

      The Figure shows an isometric cut view of one example of the
O-ring clamping spindle motor.  This device comprises a hub shaft #1
for a spindle motor, an O-ring #2 having a radial directional
contracted force, which is mounted on a slanting surface for
converting the radial directional force of O-ring #2 to the axial
directional force.  A disk #3 is positioned between the hub #1 and
the O-ring #2.

      Conventional clamping devices usually include multiple screw
fasteners for providing clamping force.  Then, unbalancing the and
concentration of pressing force occurs particularly around each screw
axis.  Further, the thickness of the device equipment must be enough
to mount the screws.  On the other hand, the O-ring has a symmetric
clamping force in geometry, so it provides an uniform clamping force,
and it can be mounted in a thin space.