MITTELS KUGELUMLAUFSPINDEL ANGETRIEBENE, WAELZKOERPERGELAGERTE LINEARFUEHRUNGSEINHEIT

摘要

A ball screw driven linear motion rolling contact guide unit includes a rail having a generally U-shaped cross section and a ball screw shaft and a slider received in the rail and operatively coupled to the ball screw shaft. A plurality of rolling members are interposed between the slider and the rail. The rail has a bottom wall formed with a trench in which a quantity of damping oil is reserved. The slider is provided with a projection which projects into the trench to thereby define a squeeze film damper mechanism. The slider is also provided with an endless circulating path, including a load path section, a return path section and a pair of curved connecting path sections, each connecting the corresponding ends of the load and return path sections, whereby the return path section is located lower in level than the load path section.