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Head Suspension With Separated Pitch and Roll Axes

IP.com Disclosure Number: IPCOM000039674D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Knappe, LF: AUTHOR

Abstract

The head suspension design illustrated in the figures separates the pitch and roll axes of the head. The roll axis is placed through or slightly below the center of gravity of the head. The pitch axis is placed through or slightly below the head/disk interface. (Image Omitted) The assembled head suspension structure is shown in Figs. 1 and 2. The suspension has only three components: a pitch flexure element 5, a roll flexure element 6 and a load beam 7. As shown in Fig. 3, the roll and pitch axes are separated by the use of two load points 8 on the roll flexure 6. The position of these two load points determines the location of the roll axis. The roll flexure 6 is located relative to the head so that the roll axis passes through or slightly below the center of gravity of the head.

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Head Suspension With Separated Pitch and Roll Axes

The head suspension design illustrated in the figures separates the pitch and roll axes of the head. The roll axis is placed through or slightly below the center of gravity of the head. The pitch axis is placed through or slightly below the head/disk interface.

(Image Omitted)

The assembled head suspension structure is shown in Figs. 1 and 2. The suspension has only three components: a pitch flexure element 5, a roll flexure element 6 and a load beam 7. As shown in Fig. 3, the roll and pitch axes are separated by the use of two load points 8 on the roll flexure 6. The position of these two load points determines the location of the roll axis. The roll flexure 6 is located relative to the head so that the roll axis passes through or slightly below the center of gravity of the head. Roll flexure 6 is attached to the load beam 7. The load beam 7 applies the head preload through the two load points 8. The load beam 7, as seen in Fig. 3, includes two arms 10 extending from the distal end which engage the roll flexure load points 8. The pitch flexure element 5 is attached to the top of head 9 and the top of roll flexure 6, as shown in the side view of Fig. 1 and the top view of Fig. 2. Conceptually, the pitch flexure element 5 consists of two identical four bar linkages; one on each side of the head, the head being the coupler link. The pivot points are in the form of elastic hinges. By the proper selection of link lengths and attachment points, the center of pitch rotation can be located at the head/disk interface or below as desired (see Fig.
1). Present head suspension designs have the pitch axis of the head above the head/disk interface. During the takeoffs and landings of these heads, the contact pressure distribution on the air bearing surface has a very high pressure along the leading edge and an approximate...