Browse Prior Art Database

Disk Pack Clamping Ring

IP.com Disclosure Number: IPCOM000060511D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Brooks, PE: AUTHOR [+4]

Abstract

An annular clamping ring for a disk pack assembly is shrink-fitted over a spindle of the disk pack. The ring has a plurality of feet annularly located on the outer portions of the bottom surface of the ring to contact the disk pack. A preload force applied to the inner portions of the upper surface of the ring creates a clamping force due to the elasticity of the ring. A thermally fit ring in Fig. 1 is indicated at 10. The ring is annular in shape and has a plurality of feet 12 spaced about the bottom of its lower surface which contact the disk pack after assembly. A cross section of one of the feet 12 is shown in Fig. 2. When fitting the ring to a disk pack, the ring is heated to a point where its inner diameter is greater than the diameter of the hub of the disk pack.

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Disk Pack Clamping Ring

An annular clamping ring for a disk pack assembly is shrink-fitted over a spindle of the disk pack. The ring has a plurality of feet annularly located on the outer portions of the bottom surface of the ring to contact the disk pack. A preload force applied to the inner portions of the upper surface of the ring creates a clamping force due to the elasticity of the ring. A thermally fit ring in Fig. 1 is indicated at 10. The ring is annular in shape and has a plurality of feet 12 spaced about the bottom of its lower surface which contact the disk pack after assembly. A cross section of one of the feet 12 is shown in Fig. 2. When fitting the ring to a disk pack, the ring is heated to a point where its inner diameter is greater than the diameter of the hub of the disk pack. The ring is placed feet down over the hub on a disk pack assembly and allowed to rest on the top surface of the upper disk. A compliant press applies a concentric circular load to the top surface of the ring 12 close to the inner diameter, as indicated at 16 in Fig. 2. The load causes the ring to be elastically preloaded having an internal moment indicated at 18, which provides a clamping force. The load is allowed to dwell until the ring has shrunk to an interference fit with the hub. The ring 10 provides a consistent uniform clamping force with spring qualities which compensate for minor thermal changes in the pack.

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