CN201372995Y - Self drilling screw structure - Google Patents

Abstract

The utility model discloses a bore tail screw structure, it mainly has a screw body, the top of screw body is formed with a cap head, the bottom of cap head connects and is equipped with a pole body, the end of pole body is formed with a apex angle and is 120 conical surface, the central authorities department protrusion 15 of conical surface and be formed with a summit portion, and seted up corresponding chip groove respectively in the both sides of pole body second section, the outside edge of chip groove is formed with a cutting edge respectively, and in each chip groove outside and summit portion, the department's of meeting of conical surface border is formed with first respectively, the second bores the cutting edge. The utility model discloses usable summit portion drills in advance and forms a hole on the article for summit portion card is gone into in the hole and is helped the location of screw body.

Description

Drilling screw structure

technical field

The utility model relates to a drill tail screw structure, in particular to a drill tail screw structure with an apex, which is helpful for the positioning of the screw body during drilling.

Background technique

Drilling screw is a screw that integrates drilling, tapping, and tightening in one operation. Because the drilling screw has an additional drilling function, the surface hardness and core hardness of the drilling screw must be higher than that of ordinary self-tapping screws. In addition, the drilling screw still needs to do a penetration test to test that the screw can be drilled and tapped into the thread within the specified time.

The above-mentioned drilling screw, please refer to Figure 6, the drilling screw mainly includes a screw body 2, the end of the shaft 21 of the screw body 2 forms a conical surface 22, and the two sides of the lower half of the shaft 21 are respectively provided with Corresponding chip flutes 23 are provided. A cutting edge 24 is formed on the outer edge of each chip flute 23 , and a drill cutting edge 25 is formed on the outer edge of each chip flute 23 where it meets the conical surface 22 .

However, when the above-mentioned end-drilling screw is actually used, due to poor positioning, it often slips when drilling and tapping the screw hole, resulting in poor positioning, which causes confusion and inconvenience to users.

Utility model content

The purpose of this utility model is to provide a drill tail screw structure to overcome the above-mentioned shortcomings. The drill tail screw structure has an apex, which can be drilled on the object to form a hole, so that the apex is stuck in the hole and Helps locate the screw body.

In order to achieve the above purpose, the utility model proposes a drill tail screw structure, which has a screw body. The end of the shaft of the screw body is formed with a conical surface, and the center of the conical surface is provided with an apex. Chip flutes, cutting edges are formed on the outer edges of the chip flutes, and first and second drilling cutting edges are respectively formed on the outer edges of each chip flute at the junction of the apex and the conical surface.

The apex angle of the conical surface is 120°.

The conical surface protrudes by 15° to form the apex.

It can be seen from the above-mentioned component composition and implementation description that the utility model has the following advantages compared with the existing structure:

1. The end of the screw body of the present invention is formed with a vertex, which can be drilled on the object to form a hole, so that the vertex can be inserted into the hole to facilitate the positioning of the screw body.

2. The two sides of the screw body of the utility model are provided with corresponding chip removal grooves, so that the chips generated during the drilling process will move upward along the chip removal grooves to avoid overheating of chips during locking drilling In order to achieve the purpose of stable locking and positioning, it can prevent the overheating of card chips and cause the screw body to become blunt or even broken due to high temperature tempering.

Description of drawings

The following drawings are only intended to illustrate and explain the utility model schematically, and do not limit the scope of the utility model. in,

Fig. 1 is a side view of the utility model;

Fig. 2 is the enlarged side view of the utility model;

Fig. 3 is the enlarged view of the apex of the utility model;

Fig. 4 is the first use step figure of the utility model;

Fig. 5 is the second use step figure of the utility model;

Fig. 6 is an enlarged side view of the prior art.

Explanation of reference signs:

1-screw body; 11-cap head; 12-shaft; 13-conical surface; 14-vertex;

15-chip flute; 16-cutting edge; 17-first drilling cutting edge; 18-second drilling cutting edge;

2-screw body; 21-shaft; 22-conical surface; 23-chip groove; 24-cutting edge; 25-drilling cutting edge.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is now described with reference to the accompanying drawings.

First, please refer to Figures 1 to 3, the drill tail screw structure of the present invention has a screw body 1, the top of the screw body 1 is formed with a cap head 11, and the bottom end of the cap head 11 is provided with a shaft 12, The end of the shaft 12 is formed with a conical surface 13 with an apex angle of 120°. The center of the conical surface 13 protrudes 15° to form an apex 14, and there are corresponding holes on both sides of the lower half of the shaft 12. The chip flutes 15, the outer edges of the chip flutes 15 are respectively formed with a cutting edge 16, and the outer edges of each chip flute 15 are respectively formed with first and second Drill cutting edge 17,18.

When using it, please refer to Figure 4 and Figure 5, the apex portion 14 of the screw body 1 can be pressed against the appropriate position on the object, and then the first drilling and cutting edge 17 of the screw body 1 can be used to advance on the object. Drilling to form a hole, so that the apex 14 is stuck in the hole to help the positioning of the screw body 1, and the object is continuously drilled with the second drilling cutting edge 18 and the cutting edge 16, and the guide screw body 1 is gradually locked in In the object, at the same time, the chips generated during the drilling process will move up and be discharged along the chip flute 15, so as to avoid the overheating of chips during locking drilling, so as to achieve the purpose of stable locking and positioning, and It can prevent the overheating of the chippings from causing the screw body 1 to become blunt or even broken due to high temperature tempering.

However, the aforementioned embodiments or the drawings in the description do not limit the product appearance, actual size or usage method of the present utility model, and any appropriate changes or modifications by those with ordinary knowledge in the technical field shall be regarded as not departing from the scope of the present utility model. patent category.

To sum up, the embodiments of the present utility model can indeed achieve the expected use effect, and the specific structure disclosed by it has not only never been seen in similar products, nor has it been disclosed before the application, which fully complies with the provisions of the Patent Law According to the requirements, the utility model patent application is now filed according to law.

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the protection scope of the present invention.

Claims (3)

1. A drill tail screw structure, characterized in that: the drill tail screw structure has a screw body, the end of the shaft of the screw body is formed with a conical surface, and the central part of the conical surface is convexly provided with an apex, and on the shaft A chip flute is provided, and a cutting edge is formed on the outer edge of the chip flute, and first and second drilling cutting edges are respectively formed on the outer edge of each chip flute at the junction of the apex and the conical surface. 2. The drill end screw structure according to claim 1, wherein the apex angle of the conical surface is 120°. 3. The drill end screw structure according to claim 1, wherein the conical surface protrudes 15° to form the apex.

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