| 摘要 |
PCT No. PCT/GB95/02841 Sec. 371 Date Aug. 12, 1997 Sec. 102(e) Date Aug. 12, 1997 PCT Filed Dec. 5, 1995 PCT Pub. No. WO96/18045 PCT Pub. Date Jun. 13, 1996Several improvements relating to hexapods are described. The improvements relate to universal joints and ball and socket joints where two struts meet at a common focal point, two axis gimbals which are used for ballscrew drives in universal joints and a micro positioning device incorporating a hexapod structure. The universal joint (1) includes two part spheres (13, 14) connected to one strut (12) and a rotatable ring (15) connected to another strut (11). The two part spheres (13, 14) are secured together by fasteners (25) with the ring (15) secured therebetween so as to form a sphere. The ring (15) is preloaded and rotatable about a common axis (17) of the sphere. |
