Cross thread arranged inside the nut and its production process

Abstract

The invention discloses cross threads arranged in a nut. The wall surface of a through hole sinks towards the outer wall of a nut body to respectively form left-hand threads and right-hand threads, the crest of any circle of left-hand thread in the left-hand threads is correspondingly intersected with the root of a circle of right-hand thread in the right-hand threads, adjacent longitudinal cross points are connected with a transverse cross section between the adjacent longitudinal cross points to form a pyramid structure, the pyramid top faces the outer wall of the nut body, the left-hand threads and the right-hand threads are machined on the inner wall of the through hole, the crest line of each circle of left-hand thread is intersected with the root line of the right-hand thread on the same height as the left-hand thread to form a plurality of rhombuses, and the two inclined surfaces of the left-hand threads cut the two inclined surfaces of the right-hand threads to form four through prismatic sides to form the pyramid structure with cross threads. According to the cross threads, the left threads and the right threads on a screw stem can be conveniently screwed into a hinge ball threaded hole through the added pyramid structure, the application range is widened, and the stress of the threads meets the requirements on mounting.

Description

technical field [0001] The invention relates to a cross thread arranged inside a nut and its production process, which is used for the connection of structures or machine parts, and is specifically a light steel truss or steel grid structure. Background technique [0002] In the conventional steel truss or steel grid structure, there are a large number of spherical joint structures, such as figure 1 Shown: There are mainly hollow hinge balls, the middle section of the rod and the bolted joints at both ends of the rod. The overall rod and the ball joint are generally connected by bolts. The screw rods (external threads) of the bolts are arranged on the joints at both ends of the rods, and the nuts (internal threads) corresponding to them are arranged on the hollow balls at the joint joints. Moreover, the bolt is basically a right-handed or left-handed thread with a single head, a standard pitch t, ​​and a standard 60° tooth profile, such as image 3 , Figure 4 shown. In ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of complex connection structure of the existing spherical hinge truss and cumbersome thread screwing process during installation, or the need to choose right or left, and the labor intensity of the operator is high. And its production process, the cross thread can make the right and left threads of the rod through the set rhombic structure, can be screwed into the ball screw hole without selection and convenience, which simplifies the connection structure and improves the installation efficiency. Reduce the labor intensity of the operator

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