| 摘要 |
The invention concerns a ball screw and nut mechanism comprising a screw (14) and a nut (12) with threads, the nut cooperating with the screw (14) via balls (28) that can circulate in a raceway (26) formed by the opposing threads (22, 24) of the screw and of the nut, the nut being further provided with at least one recirculation insert (32) inserted from an outer face (18) of the nut, into at least one cylindrical housing (30), passing through the nut from the outer face (18) of the nut (12) to the thread (22) of the nut, the recirculation insert (32) having a first end (34) with a ball transfer groove (36) turned towards the screw (14). According to the invention: the mechanism comprises a holding body for holding the recirculation insert (32), configured to hold the recirculation insert in the housing, the recirculation insert (32) having a second end with a shoulder bearing on a bearing region of the nut (12), the second end of the recirculation insert (32) comprising an orientation lug (38) having an angular position predetermined and fixed relative to the ball transfer groove (36), the orientation lug cooperating with at least one guide relief (44) of the holding body to fix an orientation of the recirculation insert (32) in the housing, the orientation of the insert being fixed such that the transfer groove (36) is adjusted to the raceway. |
