Backflow assembly of ball screw

Abstract

The invention discloses a backflow assembly of a ball screw. The ball screw comprises a nut seat, multiple rolling pieces and a rolling groove which is formed in the inner side of the nut seat to allow the rolling pieces to roll circularly. The rolling groove is provided with an outflow section and an inflow section. The backflow assembly comprises a backflow piece, a rotation groove, a mounting groove and a sensing module, the backflow piece is arranged on the nut seat, the rotation groove penetrates through the backflow piece, and the two opposite ends of the rotation groove correspond to the outflow section and the inflow section correspondingly. The rotation groove comprises a rotation section which communicates with the outflow section and rotates around a reference point and a leading-out section which is connected with the rotation section and the inflow section. The mounting groove is formed in the backflow piece and relatively located on the outer side of the rotation section, the sensing module is arranged in the mounting groove and can output a warning signal when the backflow piece bears force to deform and the two opposite sides are pressed, and a safety protection effect can be achieved.

Description

technical field [0001] The invention relates to a ball screw, in particular to a return assembly of the ball screw. Background technique [0002] An existing recirculating ball screw comprises a screw shaft, a nut seat sheathed on the screw shaft, two return end caps respectively arranged at two opposite ends of the nut seat, and a plurality of return caps which can be mounted on the nut seat. The rolling element that circulates between the seat and the return end cover. [0003] After the ball screw is used for a long time, wear will occur, which in turn will lead to the problem that the rolling element flows unsmoothly. The situation of bead squeezing is caused, and then pressure is applied to the return end cover in the return flow channel. Once the pressure is too large, the return end cover made of plastic material will be damaged, causing the rolling parts to flow out, and then the return end cover will be damaged. The screw shaft and the nut seat cannot operate in a...

AI Technical Summary

Problems solved by technology

[0003] After the ball screw is used for a long time, wear will occur, which in turn will lead to the problem that the rolling element flows unsmoothly. The situation of bead squeezing is caused, and then pressure is applied to the return end cover in the return flow channel. Once the pressure is too large, the return end cover made of plastic material will be damaged, causing the rolling parts to flow out, and then the return end cover will be damaged. The screw shaft and the nut seat cannot operate in a normal manner and must be shut down for maintenance. On the other hand, when the screw shaft is of the type extending up and down, the outflow of the rolling elements will cause the nut seat to be unrestricted. Dropping along the screw shaft will not only damage the recirculating ball screw further, but also damage the surrounding machines or other materials

[0004] Another type of recirculating ball screw will install a metal safety cover on the outside of the return end cover, so that when the return end cover is damaged, the rolling parts will not flow out. However, this method will cause the circulation The stroke of the type ball screw is shortened, and there are many procedures for replacing the return end cover, which has the problem of inconvenient maintenance.

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