| 摘要 |
A cross-linear slide bearing unit for use at an intersection of, for example, a column and a cross rail in a machine tool includes a bearing body having a pair of recesses formed in orthogonal relation to each other with a solid portion interposed therebetween. The bearing body further has loaded ball guide grooves respectively formed in the inner walls of ridges which face the corresponding recesses, and non-loaded ball guide bores formed through the ridges in parallel to the corresponding loaded ball guide grooves and with a necessary distance therefrom. End plates are respectively mounted to end portions of the bearing body. Each end plate is provided in the inner surface thereof with a ball guiding U-groove for providing communication between the non-loaded ball guide bores and the corresponding loaded ball guide grooves. The cross-linear slide bearing unit further includes track rails slidably fitted in the recesses, respectively, of the bearing body through balls. Each track rail is provided in the lateral outer walls thereof with loaded ball raceway grooves which are parallel to the corresponding loaded ball guide grooves. The bearing body may have in its approximately central portion a through hole of any desired shape, while the track rails may be respectively formed with windows which communicate with the through hole.
|
