Browse Prior Art Database

Elimination of Radial Play in Bearings

IP.com Disclosure Number: IPCOM000083276D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Lipscombe, JD: AUTHOR [+2]

Abstract

It is often found necessary in precision mechanisms to eliminate the axial and radial clearance present in ball bearing assemblies. This is conventionally achieved by the arrangement shown in Fig. 1.

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Elimination of Radial Play in Bearings

It is often found necessary in precision mechanisms to eliminate the axial and radial clearance present in ball bearing assemblies. This is conventionally achieved by the arrangement shown in Fig. 1.

Here spindle 1 is supported for rotation in housing 2 by two bearings 3 and 4. One bearing 3 is a press fit in the bore of the housing 2 and is pushed home until it is located against the projecting ring 5. The other bearing 4 is a relatively loose fit to enable an axial preload to be applied. The preloading of the bearings is achieved by compression spring 6 disposed between bearing 4 and a further projecting ring 7. The disadvantage with this arrangement is that the clearance between bearing 4 and the housing results in undesirable radial play of the assembly.

The problem is overcome by employing the additional support member for bearing 4 shown in Fig. 2. This member consists of a rigid annular ring 8 into which the bearing 4 is press-fitted. The ring 8 is provided with two projections 9 extending axially along the outer surface of the ring 8 and spaced 120 degrees apart. These projections 9 serve to locate the ring 8 in the bore of the housing 2 in a unique position, whilst still permitting axial movement to take place.

Spaced 120 degrees from the two projections 9 is a slot 10, into which a plug 11 of plastic or other low-friction material extends from a corresponding hole 12 in the bore of the housing 2. After the axial lo...