| 摘要 |
PURPOSE:To form a bearing in a small width, by forming both a return hole in a casing to an upper inner side from the position of loaded balls and direction- change paths on the internal surfaces of side plates in a laterally symmetrical position with the paths serving as the center. CONSTITUTION:Loaded balls 3 are guided between a track groove 1a formed in a track rail 1 and a track groove 2a formed in a casing 2. And the casing 2 forms in its inside a return hole 2b in an upper inner side from the position of the loaded ball 3. While a direction-change 4a is formed on the internal surface of a side plate so that the path may be formed for its center line M-M in a laterally symmetrical shape.
|
