Browse Prior Art Database

Pivot Bearing Assembly

IP.com Disclosure Number: IPCOM000076960D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Bosier, MH: AUTHOR [+3]

Abstract

The pivot bearing shown in the figures has negligible radial and axial clearance and is adjustable in the axial direction.

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Pivot Bearing Assembly

The pivot bearing shown in the figures has negligible radial and axial clearance and is adjustable in the axial direction.

The rotatable shaft 1, carrying an arm 2 to be rotated, is supported at each end by two needle roller cages 3 pressed into housing 4. Radial clearance of the bearing is eliminated by an insert 5 in shaft 1, loaded in a direction normal to the shaft by spring 6. The preload force is chosen to exceed the externally applied forces on the bearing. By limiting the width of the insert 5 to approximately half the length of the needle rollers 7, a smooth transition of rollers from shaft 1 to insert 5 is achieved. The arrangement of this part of the bearing is clearly shown in the enlarged section, along line A-A.

An adjusting screw 8 in housing 4 enables axial adjustment of the shaft 1. A low-friction pad 9 on the end of screw 8 bears against one end of shaft 1. Contact between shaft 1 and pad 9 is maintained by a further pad 10 on the end of rod 11. This rod is slidably mounted in housing 4 and loaded against the other end of the shaft 1 by spring 12, to eliminate axial clearance. As before, the preload force is chosen to exceed externally applied forces on the bearing in an axial direction.

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