| 摘要 |
An alignment positioning mechanism for correcting and compensating for misalignment of structures to be coupled thereby. The mechanism comprises a power screw 12 with a base portion 13 and a threaded shank portion 14. A mounting fixture 18 is provided for rigidly coupling said base portion to the mounting interface of a supporting structure with the axis of the screw perpendicular thereto. A traveling ball nut 40 threaded on the power screw 12 is formed with an external annular arcuate surface 41 configured in the form of a spherical segment and enclosed by a ball nut housing 50 with a conforming arcuate surface 51 for permitting gimballed motion thereon. The ball nut housing 50 is provided with a mounting surface 53a which is positionable in cooperable engagement with the mounting interface of a primary structure to be coupled to said supporting structure. Cooperative means (66,70) are provided on the ball nut 40 and ball nut housing 50, respectively, for positioning the ball nut and ball nut housing in relative gimballed position within a predetermined range of relative angular relationship whereby severe structural stresses due to unequal loadings and undesirable bending moments on said mechanism are avoided.
|
