Browse Prior Art Database

Rotary Actuator Comb with Removable Arms

IP.com Disclosure Number: IPCOM000109984D
Original Publication Date: 1992-Oct-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 2 page(s) / 76K

Publishing Venue

IBM

Related People

Reidenbach, JR: AUTHOR

Abstract

A method is described for configuring a rotary actuator, as used in hard disk drives, with individually removable arms. Two different means are shown for clamping the arms to a central hub.

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This is the abbreviated version, containing approximately 80% of the total text.

Rotary Actuator Comb with Removable Arms

       A method is described for configuring a rotary actuator,
as used in hard disk drives, with individually removable arms.  Two
different means are shown for clamping the arms to a central hub.

      Fig. 1 depicts the basic concepts of this device.  A central
hub 1 contains a precision bore 2 to accommodate a bearing assembly 3
and a series of horizontal slots 4 that are cut part way into the hub
to accept a number of arms 5.  Normally each arm is fitted with one
or a pair of data read/write heads, but are not shown herein.
Optional projections 6 extending from the hub provide support for a
coil (also not shown) which is part of a voice coil motor that is
typically used to actuate a disk drive comb assembly.

      Three locating features 7 integral with each arm mate with the
bearing assembly and serve to laterally position each arm relative to
the axis of rotation.  When properly positioned, holes 8 in the arms
align vertically with corresponding holes 9 in the hub.

      Two different means are shown to rigidly fix the arms to the
hub.  Fig. 2 illustrates a long bolt 10 inserted through the aligned
holes provided in the hub and arms. When adequately tightened, the
bolt and corresponding nut 11 clamp the arm stack to the hub.  Fig. 3
illustrates an alternative clamping means.  An elastomeric cylinder
or sleeve 12 is shown fitted over a long bolt and inserted through
the aligned holes.  When the bolt...