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Roller Element Bearing Retention Device

IP.com Disclosure Number: IPCOM000060438D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Blaylock, CH: AUTHOR [+3]

Abstract

Positive engagement of shaft to the inner races of rolling element bearings is provided, allowing a slip fit of the bearing to the shaft, for assembly ease. Spring thrust washers eliminate slipping of the shaft to the inside races of the rolling element bearings, thereby precluding shaft wear and fretting corrosion on the shaft of a copier's drive assembly. As shown in the figure, both bearings 10 and 11 are pressed on their outer races, per normal industry practice. Prior to assembly of housing 12 to plate 13, shaft 14 is assembled to bearing 10's inner race by compressing two Belleville spring washers 15 and installing snap ring 16. An axial force of approximately 360 pounds is applied between the Belleville spring washers and the snap ring.

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Roller Element Bearing Retention Device

Positive engagement of shaft to the inner races of rolling element bearings is provided, allowing a slip fit of the bearing to the shaft, for assembly ease. Spring thrust washers eliminate slipping of the shaft to the inside races of the rolling element bearings, thereby precluding shaft wear and fretting corrosion on the shaft of a copier's drive assembly. As shown in the figure, both bearings 10 and 11 are pressed on their outer races, per normal industry practice. Prior to assembly of housing 12 to plate 13, shaft 14 is assembled to bearing 10's inner race by compressing two Belleville spring washers 15 and installing snap ring 16. An axial force of approximately 360 pounds is applied between the Belleville spring washers and the snap ring. Since this force is applied to the bearing's inner race, the friction between the snap ring and inner race, and between the Belleville spring washer and the inner race, act to prevent rotation of the inner race relative to the shaft. This principle is also applied to sleeve 17 which is installed in bearing 11. The shaft is designed such that its outside diameter is a slip fit with the inside diameter of the bearing 10 and inside diameter of sleeve 17, for assembly ease. A pin 20 is provided in the flange of the sleeve. This pin engages a hole in the hub of gear 21. This provides positive rotation of the sleeve with the gear hub such that no slippage occurs between the shaft and sleeve...