CN214788461U - Conical head self-tapping screw - Google Patents

Abstract

The utility model discloses a conical head self tapping screw, including nail point, nail pole and nail cap, the nail point set firmly in the one end of nail point, the nail cap set firmly in the nail pole is kept away from the one end of nail point, be equipped with on the nail point and cut the tail, the nail pole include certainly the nail point to first polished rod section, screw thread section and the second polished rod section that nail cap direction set gradually, the screw thread in the screw thread section is equipped with the sawtooth groove, the nail cap is kept away from set up heavy groove on the terminal surface of nail pole. By adopting the structure, the centering performance of the screw is improved through the first polished rod section, and meanwhile, wood is conveniently cut and attacked.

Description

Conical head self-tapping screw

Technical Field

The utility model relates to a screw technical field, concretely relates to conical head self-tapping screw.

Background

A wood screw used for fastening a wooden material generally has a screw (shaft portion) of a predetermined length required for fastening, a screw head (head portion) provided at one end of the screw for receiving rotation, and a tip portion provided at the other end of the screw, and a drill thread is provided from the tip portion to the shaft portion. When such a wood screw is directly screwed into a wood material without a pre-drilled hole, the screw is inserted by the self-tapping function of the drilled thread, and at this time, the inserted screw is expanded from the inside of the wood material and is fixed by a pressing force due to the toughness of the wood material itself.

Application number is CN 201822135821.2's patent document discloses a multi-functional wood screw, including nut, stationary blade and screw rod, the stationary blade is located the nut with between the screw rod, just nut, stationary blade and screw rod structure as an organic whole, follow the circumferencial direction on the screw rod and spread all over the external screw thread, just the afterbody of screw rod is the tip form, a chip groove has been seted up on the external screw thread along the screw rod afterbody. In this way, the utility model discloses can adapt to the operation of various instruments, have drilling, auto-lock, difficult mashed head, difficult fracture, need not beat effects such as pre-hole tightening, can reduction in production cost simultaneously, reduce the loss. However, the structure has poor centering performance, and the connection strength between the screw and the wood board is not high, so that the screw is easy to loosen.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a conical head self tapping screw, including nail point, nail pole and nail cap, the nail point set firmly in the one end of nail point, the nail cap set firmly in the nail pole is kept away from the one end of nail point, be equipped with on the nail point and cut the tail, the nail pole include certainly the nail point to first polished rod section, screw thread section and the second polished rod section that the nail cap direction set gradually, the screw thread in the screw thread section is equipped with the sawtooth groove, the nail cap is kept away from set up heavy groove on the terminal surface of nail pole.

On the basis of the above scheme and as a preferable scheme of the scheme: the nail cap comprises a nail cap body and an extension part, the nail cap body is fixedly connected with the nail rod through the extension part, and cutting ribs are arranged on the extension part.

On the basis of the above scheme and as a preferable scheme of the scheme: the section radius of the extension part is gradually reduced from one end far away from the nail rod to one end close to the nail rod.

On the basis of the above scheme and as a preferable scheme of the scheme: the number of the cutting ribs is four, and the cutting ribs are uniformly arranged around the axis of the extension part at intervals in the circumferential direction.

On the basis of the above scheme and as a preferable scheme of the scheme: the number of the cutting tails is three, and the cutting tails are uniformly arranged along the circumferential direction of the axis of the nail tip at intervals.

On the basis of the above scheme and as a preferable scheme of the scheme: the sink groove is a cross groove.

On the basis of the above scheme and as a preferable scheme of the scheme: and barbs are fixedly arranged on the outer surface of the second polished rod section.

On the basis of the above scheme and as a preferable scheme of the scheme: the outer surfaces of the first polished rod section, the threaded section and the second polished rod section are coated with reinforcing coatings.

On the basis of the above scheme and as a preferable scheme of the scheme: the reinforcing coating is acrylate.

The utility model discloses compare prior art protrusion and profitable technological effect and be:

1. the first polish rod section is arranged, before the screw is driven into the wood board, the screw tip and the first polish rod section are driven into the wood board through a hammer, and then the screw is screwed in and fixed. Make the screw have better centering nature through first polished rod section, avoid the screw slant to get into the plank and lead to the connection stability to receive the influence.

2. The thread on the thread section is provided with the sawtooth groove, so that the thread can conveniently cut wood and can be conveniently attacked.

3. The surface of second polished rod section has set firmly the barb, gets into the plank at the screw and realizes fixed in-process, and the barb receives the extrusion and pastes the surface in second polished rod section tightly, and when the screw outwards moved, the barb received the effort and can outwards open in order to hinder the screw outwards movement, improved with the plank between be connected stability, connect firmly, difficult not hard up.

Drawings

Fig. 1 is a schematic structural view of a cone head tapping screw according to the present invention;

FIG. 2 is a schematic structural view of the nut;

fig. 3 is an enlarged schematic view of a structure in fig. 1.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "lateral", "longitudinal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, and are used merely for convenience of description and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

The utility model discloses a conical head self-tapping screw, below combine the attached drawing, further describe utility model's structure principle and theory of operation.

As shown in fig. 1 to 3, the utility model relates to a cone head self-tapping screw, which comprises a nail point 1, a nail rod 2 and a nail cap 3, wherein the nail point 1 is fixedly arranged at one end of the nail point 1, the nail cap 3 is fixedly arranged at one end of the nail rod 2 far away from the nail point 1, and the nail point 1 is provided with a tail cutting part 4, specifically, the number of the tail cutting parts 4 is three, and the tail cutting parts 4 are uniformly arranged along the circumferential direction of the axis of the nail point 1 at intervals, so that the nail point 1 can conveniently drill into a wood board, and the generated wood chips can be effectively removed by the tail cutting part 4; the nail rod 2 comprises a first polished rod section 5, a threaded section 6 and a second polished rod section 7 which are sequentially arranged from the nail tip 1 to the nail cap 3, before a screw is driven into a wood board, the nail tip 1 and the first polished rod section 5 are firstly knocked into the wood board through a hammer, then the screw is screwed in and fixed, the screw has better centering performance through the first polished rod section 5, and the problem that the connection stability is influenced because the screw obliquely enters the wood board is avoided; the thread 8 on the thread section 6 is provided with the sawtooth groove 9, so that the thread 8 can conveniently cut wood and can conveniently tap the wood; the nail cap 3 includes nail cap body 10 and extension 11, the cross-section radius of extension 11 reduces gradually from the one end of keeping away from nail pole 2 to the one end that is close to nail pole 2, nail cap body 10 passes through extension 11 fixed connection with nail pole 2, cutting muscle 12 has been seted up on the extension 11, specifically, the quantity of cutting muscle 12 is four and cutting muscle 12 evenly sets up around the axis circumference interval of extension 11, set up the counter sink 13 on the terminal surface of nail pole 2 is kept away from to nail cap body 10, specifically, counter sink 13 is the cross recess in this embodiment, of course, the cross recess can also be the counter sink of a font, interior triangle-shaped or interior hexagon.

Further, the surface of second polished rod section 7 has set firmly barb 14, gets into the in-process that the plank was realized fixing at the screw, and barb 14 receives the extrusion and pastes in the surface of second polished rod section 7 tightly, and when the screw outwards moved, barb 14 received the effort and can outwards open in order to hinder the screw outwards movement, improved with the plank between be connected stability, connect firmly, difficult not hard up.

Consider that there is comparatively violent friction between nail pole 2 and the plank, in order to avoid nail pole 2 because of receiving damage screw thread such as friction and saw-dust, influence the connection effect, first polished rod section 5 in this embodiment, the surface of screw thread section 6 and second polished rod section 7 all scribbles reinforced coating 15, specifically, reinforced coating 15's material is acrylic ester, of course, reinforced coating 15's material can also be the silicate material, can effectively strengthen first polished rod section 5, the intensity of screw thread section 6 and second polished rod section 7.

The specific working principle is as follows: nail point 1 into plank until first polished rod section 5 gets into with the hammer earlier, set up like this because first polished rod section 5 is cylindrical, so the screw at this moment has better centering nature, then with screw in plank, receive the extrusion at screw in-process barb 14 and paste the surface in second polished rod section 7, when the screw outwards moves, barb 14 receives the effort and can outwards open in order to hinder the screw outwards move, improved and the plank between the stability of being connected, it is firm to connect, difficult not hard up.

It will be apparent to those skilled in the art that modifications and variations can be made in the above-described embodiments, or some features of the invention may be substituted or omitted, and any modification, substitution, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (4)

1. The utility model provides a conical head self tapping screw, includes nail point, nail pole and head of a nail, the nail point set firmly in the one end of nail point, the head of a nail set firmly in the nail pole is kept away from the one end of nail point, its characterized in that: the nail head is provided with a tail cutting part, the nail rod comprises a first polished rod section, a threaded section and a second polished rod section which are sequentially arranged from the nail head to the nail cap, threads on the threaded section are provided with sawtooth grooves, and the end face of the nail cap far away from the nail rod is provided with a sunk groove;

the nail cap comprises a nail cap body and an extension part, the nail cap body is fixedly connected with the nail rod through the extension part, and the extension part is provided with a cutting rib;

the section radius of the extension part is gradually reduced from one end far away from the nail rod to one end close to the nail rod;

the number of the cutting ribs is four, and the cutting ribs are uniformly arranged around the axis of the extension part at intervals in the circumferential direction;

the number of the cutting tails is three, and the cutting tails are uniformly arranged along the circumferential direction of the axis of the nail tip at intervals;

and barbs are fixedly arranged on the outer surface of the second polished rod section.

2. A tap screw with a conical head according to claim 1, wherein: the sink groove is a cross groove.

3. A tap screw with a conical head according to claim 1, wherein: the outer surfaces of the first polished rod section, the threaded section and the second polished rod section are coated with reinforcing coatings.

4. A tap screw with a conical head according to claim 3, characterized in that: the reinforcing coating is acrylate.

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