| 摘要 |
A roller screw comprises a screw shaft (1) externally formed with a spiral roller rolling groove (1a), a nut member (2) internally formed with a spiral load roller rolling groove (2a) opposed to the roller rolling groove (1a), and a plurality of rollers (6) received between the roller rolling groove (1a) and the load roller rolling groove (2a). The plurality of rollers (6) are cross-arranged, and their diameter (D) is oversized, being greater than specified dimension. According to such a screw, it is possible to pre-load to an optimum degree according to the construction of the roller screw, and therefore, the rigidity of the roller screw can be improved. |
