| 摘要 |
<p>A linear motion guide unit is disclosed wherein rolling elements(7) are allowed to run smoothly through a turnaround(15) and less subject to wear. Separators (22) connected to elongated coupler members(23,28) are allowed to travel ahead together with the rolling elements(7) through a recirculating passage(21), which is composed of a load raceway(16), a return passage(12) and turnarounds(15). The separator(22) are each made unchanged in thickness at a limited zone over which a sliding contact point thereof with the associated rolling element(7) changes place from S1 to S12 when the separator(22) moves through the turnaround(15). The coupler member(23,28) is made in the form of a flexible strip kept substantially constant in cross section throughout the overall length to bend uniformly with a fixed radius(RB) of curvature when moving in the turnaround(15). The coupler member(23,28) in the turnaround(15) travels along a curve having a radius(RB) of curvature, which is less than a radius(RO) of curvature of a locus of the center of the rolling element(7), but larger than a radius(RS) of curvature of a locus of the sliding contact point between the separator(22) and the associated rolling element(7), which will change place from S1 to S12 when the separator(22) moves through the turnaround(15). <IMAGE></p> |
