Thread screw joint structure

Abstract

The invention relates to a thread screw joint structure. The thread screw joint structure is used for solving the problem that traditional thread screw joint is not tight enough. The thread screw joint structure comprises an internally threaded piece and an externally threaded piece. The thread pitch specifications of internal threads of the internally threaded piece and external threads of the externally threaded piece are made to have slight difference, so that the internal threads and the external threads can conduct mutual interference, and therefore the screw joint tightness degree is improved.

Description

Technical field [0001] The invention relates to a threaded screwing structure, in particular to a threaded screwing structure that can improve the tightness of screwing when screwing components with threads are screwed together. Background technique [0002] Common internally threaded parts and externally threaded parts that can be screwed together include nuts and screws, internal pipe joints and external pipe joints, etc.; take nuts and screws as examples, please refer to figure 1 , Which is an existing nut 91 and screw 92. The inner peripheral surface of the nut 91 has a plurality of internal threads 911 connected in a spiral shape, and the outer peripheral surface of the screw 92 has a plurality of outer threads connected in a spiral shape. Threads 921, and the thread specifications of each internal thread 911 and each external thread 921 match. Accordingly, when the existing nut 91 and the screw 92 are screwed together, the central axis S1 of the nut 91 and the central axis ...

AI Technical Summary

Problems solved by technology

[0003] However, when the external thread 921 of the screw 92 is screwed with the internal thread 911 of the nut 91, between the crest of the external thread 921 and the valley of the internal thread 911, and between the internal thread 911 The same small gap will be formed between the screw crest and the screw valley of the external thread 921, so the existing nut 91 and screw 92 are easy to loosen gradually due to vibration after being locked.

[0004] For this reason, the present practice all is after locking this existing nut 91 and screw 92, additionally uses tool to clamp this nut 91, makes this nut 91 produce slight deformation, to narrow this nut 91 and screw 92. The clearance of the screw 92 delays the gradual loosening of the nut 91 and the screw 92 due to vibration, but it is still necessary to re-examine and improve the loosening of the two after a period of time, making it difficult to reduce maintenance for a long time. The required manpower and time costs; and once the maintenance is neglected, unnecessary accidents may occur due to the loosening of the nut 91 and the screw 92, so it is really necessary to improve

[0005] Similarly, when the inner threaded pipe joint and the outer threaded pipe joint are screwed together, there will also be the aforementioned small gap, so it is necessary to wrap items such as leak-proof tape to ensure the tightness of the two to prevent leakage, so the construction steps are more complicated. Complicated and expensive

In addition, items such as leak-proof tape will deteriorate and age with time, so that the leak-proof effect will gradually deteriorate, and regular maintenance needs to be arranged, so the cost of manpower, time and consumables required for maintenance is difficult to reduce

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