| 摘要 |
The present invention relates to a linear unit comprising at least one guide rail 12 , at least one substantially U shaped carriage 40 displaceable on the guide rail 12 , and a transverse support segment 42 and two lateral leg segments 44 , where the segments 42, 44 partly enclose the guide rail 12 , further a playfree bearing configured between the guide rail 12 and the carriage 40 and at least two bearing elements and at least two bearing surfaces 14 constituted at the guide rail 12 to brace and guide the bearing elements, and means to adjust the bearing in playfree manner. In the invention, the bearing elements are designed in a manner that they are rotatable relative to the guide rail 12 and the carriage 40 to adjust the bearing in playfree manner. The rotatable design of the bearing elements of the invention assures that they automatically align themselves with respect to the corresponding bearing surfaces when the bearing is being adjusted.
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