| 摘要 |
A casing mounted on a track rail makes linear motion through a series of rollers circulating endlessly. A circulating path for the rollers is constructed by a load track, return hole and direction changing path. The load track and return hole are straight, parallel to each other and approximately square shape in cross section. The center of the return hole does not lie in the horizontal bisecting plane of the right angle V groove of the load track. The return hole is symmetric to the load track w.r.t. the perpendicular bisector of the segment line joining the centers of the rollers in the return hole and the load track. The direction changing path is a cylindrical surface of revolution which is approximately square shape in cross section and which is formed by revolving 180 deg. between the load track and the return hole.
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