Browse Prior Art Database

Spring-Loaded Bearing Housing

IP.com Disclosure Number: IPCOM000043616D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

McNutt, RD: AUTHOR

Abstract

In precision rotating mechanisms mounted on bearings, one bearing is generally preloaded to provide radial stiffness. Preloading of the outer race requires the free movement axially of that race in its housing. Because of machining tolerances on the bearing face and housing, the bearing face can move radially in the housing. A mechanical design that fits the housing to the bearing in such a manner that radial play is reduced to zero is described below and shown in Figs. 1-4. The bearing 10 is placed in a subhousing 11 that is machined to a close but clearance fit to the bearing outer race. The subhousing 11, which is ring shaped in design, is slotted radially across one side 12 and has a reduction 13 in cross section on the opposite side, thus forming a stiff hinge point on that side.

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Spring-Loaded Bearing Housing

In precision rotating mechanisms mounted on bearings, one bearing is generally preloaded to provide radial stiffness. Preloading of the outer race requires the free movement axially of that race in its housing. Because of machining tolerances on the bearing face and housing, the bearing face can move radially in the housing. A mechanical design that fits the housing to the bearing in such a manner that radial play is reduced to zero is described below and shown in Figs. 1-4. The bearing 10 is placed in a subhousing 11 that is machined to a close but clearance fit to the bearing outer race. The subhousing 11, which is ring shaped in design, is slotted radially across one side 12 and has a reduction 13 in cross section on the opposite side, thus forming a stiff hinge point on that side. The area on each side of the split 14 is to provide surfaces that a specially designed spring 15 will act on. Spring 15 is made of flat stock and with a "C" shape and formed to dimensions that, when clipped onto the subhousing 11, will cause the subhousing diameter to close in slightly. The stiff hinge resists the pressure of the spring so that although the subhousing 11 closes around the outer bearing race 10, reducing clearance to zero, the subhousing 11 does not clamp tightly onto the bearing race 10, allowing it to move freely axially. The bearing 10 with its subhousing 11 is mounted in the supporting mechanism. Since mechanisms such as rotor/motors...