Self-tapping screw

Abstract

The invention relates to a screw, in particular to a self-tapping screw. According to the technical scheme, the self-tapping screw comprises a screw body. The screw body comprises a nut and a screw rod located at the bottom end of the nut. The screw rod is provided with threads, and a self-tapping end in a pointed cone shape is arranged at the tail end of the screw rod. A tapered cylindrical section is arranged between the nut and the screw rod. The small end diameter of the tapered cylindrical section is the same as the diameter of the screw rod, and the large end diameter of the tapered cylindrical section is smaller than the diameter of the nut. A plurality of long bar-shaped convex teeth are arranged on the circumferential face of the tapered cylindrical section. All the long bar-shaped convex teeth are arranged at intervals. A groove is formed between two threads of the screw rod and located close to the self-tapping end. The self-tapping screw has the advantages that machining and assembling are simple, the antiskid effect is obvious, an exposed part can be effectively prevented from being rusted, the service life of the screw is prolonged, and possible harm to human bodies by the exposed part can be avoided or reduced.

Description

Technical field [0001] The invention relates to a screw, in particular to a self-tapping screw. Background technique [0002] Screws are fasteners used to fix objects, and they are widely used. Usually, the screws are installed in the fixed object and the screw holes of the object connected with the fixed object to perform the fixing. Screws often appear in the process of use. Because the screws are too long, the ends of the screws are exposed to the outside. This will not only rust the screws and affect the service life, but also have safety hazards. In addition, the existing screws are being When the connecting piece is fastened and connected, because the screw is not provided with an anti-skid structure, it is necessary to use a washer for anti-skid. However, the screw uses this method for anti-skid, not only the assembly is complicated, the work efficiency is reduced, but the cost is high, and the cost is increased. . Therefore, a new technical solution should be provided t...

AI Technical Summary

Problems solved by technology

During the use of screws, it often happens that the end of the screw is exposed because the screw is too long, so that not only the screw will rust and affect the service life, but also there will be safety hazards; When the connecting parts are fastened and connected, since there is no anti-slip structure on the screw, it is necessary to use a washer to prevent the slip. However, the anti-slip method of the screw is not only complicated to assemble, but also reduces the work efficiency, and the cost is high, which increases the cost.

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