Linear motion guide unit with separators interposed between adjoining rolling elements

Abstract

More than two roller rows are arranged on only a closed or looped circuit. A separator is arranged on one roller row out of phase relative to a separator on the other roller row, thereby making less any variation in posture of the slider, which would otherwise occur when the rollers transfer from or into the load-carrying race, and vice versa, eventually improving any travelling accuracy of the slider. The separator interposed between the adjoining rollers lying in the adjoining roller rows is composed of an isolation wall coming into sliding contact with the end surfaces of the rollers lying side by side in the roller rows juxtaposed with each other, a pair of first separator wing extending sidewise from one side of the isolation wall to embrace the circular rolling surface of the roller in one roller row from both sides thereof, and a second separator wing extending from another side of the isolation wall on the opposite side of the first separator wing to lie between circular rolling surfaces of two adjacent rollers in another roller row.