CN212337835U

CN212337835U - Self-tapping expansion screw

Info

Publication number: CN212337835U
Application number: CN202020879767.7U
Authority: CN
Inventors: 张杰专
Original assignee: Ningbo Zhunte Metal Products Co ltd
Current assignee: Ningbo Zhunte Metal Products Co ltd
Priority date: 2020-05-23
Filing date: 2020-05-23
Publication date: 2021-01-12
Anticipated expiration: 2030-05-23

Abstract

The utility model discloses a self-tapping expansion screw, which comprises a screw rod (1) and an expansion pipe (2), wherein the expansion pipe (2) is sleeved on the screw rod (1), the front end of the expansion pipe (2) is provided with an opening structure, the front end of the screw rod (1) is provided with a spiral drill bit (3), and the rear part of the spiral drill bit (3) is provided with a conical head (4); the rear end of the screw rod (1) is provided with a connector for connecting with an electric drill; the tail part of the screw rod (1) is also provided with a section of thread (5); a nut (7) is arranged on the thread (5) in a matching way; the method is characterized in that: the tail end of the expansion pipe (2) is fixedly connected with a hexagonal head (6), and a through hole for penetrating through the screw rod (1) is formed in the middle of the hexagonal head (6); an external thread (8) is also arranged on the expansion pipe (2). The self-tapping expansion screw has the beneficial effects of smoother installation and better stability.

Description

Self-tapping expansion screw

Technical Field

The utility model relates to a screw technical field specifically indicates a self tapping inflation screw.

Background

The expansion screw is generally a metal expansion screw, and the expansion screw is fixed by utilizing the wedge-shaped slope to promote expansion to generate friction bond force so as to achieve the fixing effect. The expansion screw generally comprises a screw and a nut, an expansion pipe is wrapped outside the screw, a notch is formed in the front end of the expansion pipe, the screw and the nut are plugged into a hole formed in a wall, the nut is locked, the screw is pulled outwards by the nut, the taper is pulled into the iron sheet cylinder, the expansion pipe is expanded, and then the expansion pipe is tightly fixed on the wall and is generally used for fastening protective guards, awnings, air conditioners and the like on materials such as cement, bricks and the like.

Most inflation screw at present usually drills on the wall with impact electric drill earlier during the use, squeezes into the screw and bores downthehole on the wall body again, and operating procedure is comparatively loaded down with trivial details, uses comparatively inconveniently, has researched and developed a self tapping inflation screw for this reason, for example patent application number is: 201020644045.X discloses the name: patent of self-tapping expansion screw. Further referring to fig. 1, it comprises a screw 01, an expansion tube 02 and a helical bit 03; the spiral drill bit 03 is arranged at the front end of the screw rod 01, a conical head 04 matched with the expansion pipe 02 is arranged at the tail part of the spiral drill bit 03, a section of thread 05 is arranged at the tail part of the screw rod 01, and an electric drill connector is arranged at the tail end of the screw rod 01; a gasket 06 and a nut 07 are sequentially arranged on the thread section at the tail part of the screw rod 01; during actual use, the electric drill is sleeved at the tail end of the screw rod 01, then the expansion screw is directly driven into the installation body, the nut 07 is further screwed, and the conical head 04 is pulled outwards to be extruded into the expansion pipe 02 to form fastening pressure.

The inventor of the present patent application has found through practice that the expansion screw of the above-described structure, although quickly installed, still has a space that can be further optimized. The method specifically comprises the following points: 1. when the nut is locked, the spiral drill bit 03 is clamped in the installation body and is difficult to move outwards, and only the expansion pipe 02 can be forcibly pushed to move inwards, so that fastening is realized, and the installation process is not smooth. 2. When drilling, the expansion pipe 02 is carried into the wall body, the front end of the expansion pipe 02 is easily damaged in the high-speed rotation process of the auger bit 03 at the position where the front end of the expansion pipe 02 is contacted with the conical head 04, and drilling residues are easily clamped in. In summary, the existing self-tapping expansion screw has the defects of being not smooth enough in installation and easy to damage.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an installation is more smooth and easy, and the better self tapping inflation screw of stability.

In order to solve the technical problem, the utility model provides a technical scheme does: a self-tapping expansion screw comprises a screw rod and an expansion pipe, wherein the expansion pipe is sleeved on the screw rod, the front end of the expansion pipe is provided with an opening structure, the front end of the screw rod is provided with a spiral drill bit, and the rear part of the spiral drill bit is provided with a conical head; the rear end of the screw rod is provided with a connector for connecting with an electric drill; the tail part of the screw rod is also provided with a section of thread; a nut is arranged on the thread in a matching way; the tail end of the expansion pipe is fixedly connected with a hexagonal head, and a through hole for penetrating through the screw is formed in the middle of the hexagonal head; the expansion pipe is also provided with external threads.

Preferably, a gasket is further arranged between the hexagonal head and the nut.

Preferably, the hexagonal head and the nut are in a hexagonal structure with the same size.

After the structure is adopted, the utility model discloses following beneficial effect has: the tail end fixedly connected with hexagonal head of expansion pipe, still be equipped with the external screw thread on the expansion pipe, when using, squeeze into the installation internal back with the electric drill for the screw rod earlier, sheathe the expansion pipe again, if there is resistance at the sleeve pipe in-process, direct rotatory hexagonal head can drive the expansion pipe and screw in to the installation together, until it is tight with the toper headgear, the nut has continued to have kept simultaneously, after the hexagonal head is screwed, nut 7 of screwing again can carry out the secondary fastening, increase the gasket between the two, can prevent to vibrate in the use and cause both synchronous rotation and not hard up, and adopt the hexagonal structure of equidimension, during the assembly, only need with a hexagonal sleeve or spanner can. In the whole installation process, the screw rod does not need to be pulled to move outwards by screwing the nut 7, the tight connection between the auger bit and the installation body can not be damaged, and the installation stability is better.

To sum up, the utility model provides an installation is more smooth and easy, and the better self tapping inflation screw of stability.

Drawings

Fig. 1 is a schematic view showing a structure of a self-tapping expandable screw in the prior art.

Fig. 2 is a schematic structural view of the self-tapping expansion screw of the present invention.

Fig. 3 is an enlarged schematic view of the expansion tube and the hexagonal head.

As shown in the figure: the device comprises a screw rod 01, an expansion pipe 02, a spiral drill bit 03, a conical head 04, threads 05, a gasket 06, a nut 07, a screw rod 1, an expansion pipe 2, a spiral drill bit 3, a conical head 4, threads 5, a hexagonal head 6, a nut 7 and external threads 8.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With the combination of the attached

drawings

2 and 3, the self-tapping expansion screw comprises a screw rod 1 and an expansion pipe 2, wherein the expansion pipe 2 is sleeved on the screw rod 1, the front end of the expansion pipe 2 is provided with an opening structure, the front end of the screw rod 1 is provided with a spiral drill bit 3, and the rear part of the spiral drill bit 3 is provided with a conical head 4; the rear end of the screw rod 1 is provided with a connector for connecting with an electric drill; the tail part of the screw rod 1 is also provided with a section of thread 5; a nut 7 is arranged on the thread 5 in a matching way; the tail end of the expansion pipe 2 is fixedly connected with a hexagonal head 6, and a through hole for penetrating through the screw rod 1 is formed in the middle of the hexagonal head 6; the expansion pipe 2 is also provided with an external thread 8.

Preferably, a gasket is further arranged between the hexagonal head 6 and the nut 7.

Preferably, the hexagonal head 6 and the nut 7 are in a hexagonal structure with the same size.

After the structure is adopted, the utility model discloses following beneficial effect has: the tail end fixedly connected with hexagonal head 6 of expansion pipe 2, still be equipped with external screw thread 8 on the expansion pipe 2, when using, earlier squeeze into the installation internal back with the electric drill for the screw rod, sheathe the expansion pipe again, if there is resistance at the sleeve pipe in-process, directly rotatory hexagonal head 6 can drive expansion pipe 2 together to the installation internal precession, until tightly cover with conical head 04, continue to remain nut 7 simultaneously, after hexagonal head 6 screws, nut 7 screws again can carry out the secondary fastening, increase the gasket between the two, can prevent to vibrate in the use and cause both synchronous rotation and not hard up, and adopt the hexagonal structure of equidimension, during the assembly, only need with a hexagonal sleeve or spanner can. In the whole installation process, the screw rod 1 does not need to be pulled to move outwards by screwing the nut 7, the tight connection between the spiral drill bit 3 and the installation body is not damaged, and the installation stability is better.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. A self-tapping expansion screw comprises a screw rod (1) and an expansion pipe (2), wherein the expansion pipe (2) is sleeved on the screw rod (1), the front end of the expansion pipe (2) is provided with an opening structure, the front end of the screw rod (1) is provided with a spiral drill bit (3), and the rear part of the spiral drill bit (3) is provided with a conical head (4); the rear end of the screw rod (1) is provided with a connector for connecting with an electric drill; the tail part of the screw rod (1) is also provided with a section of thread (5); a nut (7) is arranged on the thread (5) in a matching way; the method is characterized in that: the tail end of the expansion pipe (2) is fixedly connected with a hexagonal head (6), and a through hole for penetrating through the screw rod (1) is formed in the middle of the hexagonal head (6); an external thread (8) is also arranged on the expansion pipe (2).

2. A self-tapping expandable screw as defined in claim 1, wherein: and a gasket is arranged between the hexagonal head (6) and the nut (7).

3. A self-tapping expandable screw as defined in claim 1, wherein: the hexagonal head (6) and the nut (7) are of hexagonal structures with the same size.