| 摘要 |
The invention relates to a ball screw mechanism (10) having a nut (20) screwing along a worm spindle (12) with at least one set of balls (18) lodged therebetween. The nut is preferably an elongate cuboid block and has gripping jaws (26, 28) for retaining a recirculator (30) that includes an inner face (32) having S-shaped curved transition grooves (34) for returning balls that circulate within the nut, by one flight each of the worm tap. Unilaterally along the axial worm-tap hole (22) in the nut (20), there is a radial recess (24) matching the shape of the recirculator (30) which is a shoe fitting into a slot adjacent the worm-tap hole (22). A straining bolt (36) may be provided on the nut (20) for adjusting the clear width (w) of its jaws (26, 28) which may be prestressed. Fixing means may be provided on the nut (20) for mounting subassemblies, engaging means, etc. |
