Screw drives for machine building and automation

摘要

Ballscrew drives comprise a threaded spindle and threaded nut. Due to the rotation of the spindle, the nut moves in a linear manner along the spindle, converting the rotary motion of the drive into linear motion. By rigidly connecting to an adjacent construction, the ballscrew drive provides axial displacement or positioning of the component. The threaded shaft can be driven by direct or indirect means and is supported on one or both sides, typically by locatingon-locating bearings. The load is transmitted from the spindle by means of precision, hardened steel balls to the nut. The nut (cylindrical or flanged) has a return system for recirculating the rolling elements.