F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
308/30
F16C 19/02 (2006.01) B64G 1/44 (2006.01) F16C 19/18 (2006.01) F16C 27/04 (2006.01)
Patent
CA 1054200
ABSTRACT A bearing and drive mechanism to rotate precisely spacecraft components, in particular, an array of solar panels. A drive shaft in such a mechanism designed for long-life capability is required to have high stiffness in addition to axial and radial constraints for precise rotation relative to a fixed housing. A preloaded pair of duplex, coacting angular contact ball bearings mounted between the shaft and housing provides axial and radial shaft constraint. A single bearing, mounted on an axially compliant diaphragm, is preloaded by resiliently flexing the diaphragm. The preloaded single bearing provides a radial constraint and thus shaft support at the mounting of the single bearing, this additional support increasing the stiffness of the shaft against moments and forces imposed on the shaft. The compliant diaphragm permits axial thermal deflections of the shaft relative to the housing, such deflections caused, under temperature changes, by the difference in thermal expansion properties of the shaft and housing.
250789
Na
Rca Corporation
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