Ball screw with backflow component

Abstract

By modifying the generally known profile of a mounting groove formed on a nut, the invention solves the problem that teeth breaking is caused when the mounting groove is formed on the nut with a low lead (namely, a lower lead angle) or more than two rolling ditches. To process and form the mounting groove, all that is needed is to use a facing mill, so as to reduce the manufacturing cost. All backflow channels in the invention are arranged in a backflow component, so as to improve the fitting accuracy between a backflow hole formed on the nut and a load path. Therefore, the operation of a rolling element can be smoother, and the noise can be reduced.

Description

technical field [0001] The invention relates to a return assembly of a linear transmission assembly, in particular to the arrangement of the return assembly and a nut of a ball screw. Background technique [0002] see figure 1 As shown in the figure, it is a configuration method of the return component and the nut of the ball screw in the known technology. The return component 2 is installed on the nut 1 with low lead (small lead angle) or more than two rolling grooves 11 , due to the limitations of the above two conditions, the thickness D between the rolling grooves 11 of the nut 1 is relatively thin, and in order to install the return assembly 2, an installation groove must be provided on the nut 1, and the contour of the installation groove must match the The shape of the return component 2, and the shape of the return component 2 is generally rectangular as shown in the figure, so it is impossible to set the installation groove with the same outline as the return compo...

AI Technical Summary

Problems solved by technology

[0002] see figure 1 As shown in the figure, it is a configuration method of the return component and the nut of the ball screw in the known technology. The return component 2 is installed on the nut 1 with low lead (small lead angle) or more than two rolling grooves 11 , due to the limitations of the above two conditions, the thickness D between the rolling grooves 11 of the nut 1 is relatively thin, and in order to install the return assembly 2, an installation groove must be provided on the nut 1, and the contour of the installation groove must match the The shape of the return component 2, and the shape of the return component 2 is generally rectangular as shown in the figure, so it is impossible to set the installation groove with the same outline as the return component 2 on the nut 1, if it is set, it will be as shown in the figure The same causes damage to the rolling groove 11 X, and relatively, the rolling elements cannot run in the rolling groove 11, so the return assembly 2 cannot be installed in a low lead (smaller lead angle) or more than two rolling grooves 11 Nut 1

[0003] However, in order to improve the above-mentioned known problems, the return assembly is installed on a nut with a low lead (smaller lead angle) or more than two rolling grooves. Japanese Patent Publication No. JP2005-233238 has a through nut The return holes at the two ends of the axial direction are provided with two return components at both ends of the return hole. Smaller lead or multiple spiral raceways lead to thinner flesh between the spiral raceways. In order to smoothly install the return component on the nut, a part of the return channel of the return component is designed on the nut, and The return channel on the nut has a curved structure and the surface is a curved surface, so it is not easy to process, and the processing time is relatively long, and the relative manufacturing cost will also increase

And even if the processing is completed, it may not match the return channel on the return component, and because the return channel is a curved structure, the rolling parts running here will definitely collide with the surface of the return channel, and part of the return channel is made of metal , so the noise generated by its impact is also relatively high, so the patented technology still cannot completely overcome the problems caused by installing the return component on a nut with a low lead (small lead angle) or more than two rolling grooves

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