Patent ID: 9194428
Filing Date: 2015-11-24
Classification: F16C

Abstract:
1. A linear motion guide unit comprising; an elongated guide rail having a first raceway surface extending lengthwise on each side of the guide rail, and a slider having a second raceway surface extending in opposition to the first raceway surface on the guide rail to define a load-carrying race between the first raceway surface and the second raceway surface, the slider that fits over or conforms to the elongated rail for movement in a sliding manner relative to the guide rail through a roller rolling through the load-carrying race, and the slider including a carriage having a return passage extending in parallel with the second raceway surface, and end caps secured on lengthwise opposite ends of the carriage and provided with turnaround passages to communicate the load-carrying race with the return passage to provide only a closed or looped circuit; wherein a plurality of roller rows are arranged on the closed or looped circuit and a separator is interposed between any two rollers to roll together with the rollers through the closed or looped circuit which is made up of the load-carrying race, the return passage and the turnaround passages; and wherein the separator is composed of an isolation wall lying between any two adjacent roller rows to come into sliding contact with axially opposite ends of the rollers juxtaposed each other in the two adjacent roller rows to guide or lead the rollers, first separator wings extending from the isolation wall in a sidewise direction to embrace on both sides of a circular rolling surface of the roller in one row of the two adjacent roller rows, and a-second separator wings extending from the isolation wall in a sidewise direction opposite to the sidewise direction to lie between circular rolling surfaces of the rollers in another row of the two adjacent roller rows.