Patent ID: 7578620
Filing Date: 2009-08-25
Classification: F16C

Abstract:
1. A linear guide device including a rail having a lateral left face and a lateral right face, a slider having a front end face and a rear end face in the longitudinal direction of the rail and having slider-side raceway surfaces opposing to rail-side raceway surfaces formed on the lateral left face and the lateral right face of the rail, end caps each attached to the front end face and the rear end face of the slider, a plurality of rollers that roll along with the relative linear motion of the slider though circulation channels formed of rolling element rolling channels formed between the rail-side raceway surfaces and the slider-side raceway surfaces, rolling element returning channels formed in the slider along the longitudinal direction of the rail and direction changing channels for rolling elements formed in the end caps, and a plurality of retaining pieces each disposed between the rollers, in which the retaining pieces have a retaining piece body having a lateral left face and a lateral right face, a first arm portion extending from the lateral left face of the retaining piece body toward end faces of the two adjacent rollers and fitting a first guide groove formed to one of wall surface portions of the circulation channels, and a second arm portion disposed in parallel with the first arm portion on the lateral right face of the retaining piece body and fitting a second guide groove formed to the other of the wall surface portion of the circulation channels, wherein the height of the retaining piece body and the height of the arm portions are defined to such a height that satisfies the conditional relations: (H the height of the first and the second arm portions in the direction crossing the axial direction of the roller is defined as a height that satisfies the conditional relation: 0.2<H