| 摘要 |
The recirculating element having a turning track corresponding to helical track of a ball screw and corresponding to returning hole of nut. And the turning track comprises a tangential direction changing position and a screw thread departing position being adjacent to an entrance of the turning track. And the entrance of the turning track has an upper wall surface and a lower wall face, which form a first inclined angle and a second inclined angle with the horizontal direction respectively. The first angle of the upper wall surface is smaller or equal to a minimum lead angle of the ball screw and the second inclined angle of the lower wall surface is smaller or equal to a maximum lead angle of the ball screw. So it is suitable for ball screws with different leads.
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