CN215673077U

CN215673077U - Combined expansion screw

Info

Publication number: CN215673077U
Application number: CN202122427927.1U
Authority: CN
Inventors: 韩斌
Original assignee: Henan Ronghui Building Materials Technology Co ltd
Current assignee: Henan Ronghui Building Materials Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-01-28
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses a combined type expansion screw which comprises a threaded shaft structure, wherein the threaded shaft structure comprises a rod piece, a screw thread and an upper inclined triangular body, the screw thread is arranged on the outer surface of the rod piece, the upper inclined triangular body is arranged on the lower side surface of the screw thread, the upper end of the rod piece is in threaded connection with a conical structure, the conical structure comprises a conical body, a conical body thread and a lower inclined triangular body, the conical body thread is arranged on the inner surface of the conical body, the lower inclined triangular body is arranged on the lower side surface of the conical body thread, and the outer surface of the conical structure is in matched connection with an expansion pipe. In the utility model, the upper inclined triangular body and the lower inclined triangular body are arranged in the threaded shaft structure and the conical structure, so that the combined expansion screw can only be rotated positively and cannot be rotated reversely, the fastening effect of the combined expansion screw is ensured when in use, and the phenomenon of screw slipping of the combined expansion screw is avoided.

Description

Combined expansion screw

Technical Field

The utility model relates to the field of fastening parts, in particular to a combined expansion 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. One end of the screw is provided with threads, and the other end of the screw is provided with conicity. The outer surface of the wall is covered by an iron sheet (some steel pipes), a half of an iron sheet cylinder (steel pipe) is provided with a plurality of notches, the iron sheet cylinder (steel pipe) and the notches are plugged into a hole drilled on the wall together, then a nut is locked, the nut pulls a screw outwards to pull the taper into the iron sheet cylinder, the iron sheet cylinder is expanded and then is tightly fixed on the wall, and the wall is generally used for fastening protective guards, rain awnings, air conditioners and the like on materials such as cement, bricks and the like. However, it is not very reliable in its fixation and may come loose if the load is subjected to large shocks, so that it is not recommended to install ceiling fans and the like.

The existing combined expansion screw has the common defects of common screws, namely, the phenomenon of screw slipping is easy to occur, and the screws with the slipping screws cannot play a good fastening effect and are easy to loosen.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a combined expansion screw.

In order to achieve the purpose, the utility model adopts the following technical scheme: a combined type expansion screw comprises a threaded shaft structure, wherein the threaded shaft structure comprises a rod piece, a screw thread and an upper inclined triangular body, the screw thread is arranged on the outer surface of the rod piece, and the upper inclined triangular body is arranged on the lower side surface of the screw thread;

the upper end threaded connection of member has the toper structure, the toper structure includes conical body, conical body screw thread and triangle body to one side down, the internal surface of conical body is provided with the conical body screw thread, the downside of conical body screw thread is provided with down the triangle body to one side, the surface cooperation of toper structure is connected with the expansion pipe.

As a further description of the above technical solution:

the expansion pipe is connected with the threaded shaft in a structure matching mode.

As a further description of the above technical solution:

the lower end of the threaded shaft structure is in threaded connection with a nut, and a gasket is arranged on the upper side of the nut.

As a further description of the above technical solution:

the lower surface of the expansion pipe and the upper surface of the gasket are positioned in the same plane.

The utility model has the following beneficial effects:

compared with the prior art, the combined expansion screw has the advantages that the upper inclined triangular body and the lower inclined triangular body are arranged in the threaded shaft structure and the conical structure, so that the combined expansion screw can only rotate positively and cannot rotate reversely, the fastening effect of the combined expansion screw is ensured when the combined expansion screw is used, and the phenomenon of screw slippage of the combined expansion screw is avoided.

Drawings

FIG. 1 is a schematic structural view of a combined expansion screw according to the present invention;

FIG. 2 is a front view of a combination expansion screw according to the present invention;

FIG. 3 is a schematic view of a threaded shaft of a combined expansion screw according to the present invention;

fig. 4 is a schematic view of a tapered structure of a combined expansion screw according to the present invention.

Illustration of the drawings:

1. a threaded shaft structure; 2. a tapered structure; 3. an expansion tube; 4. a gasket; 5. a nut; 101. a rod member; 102. screw threads; 103. an upper oblique triangle body; 201. a conical body; 202. a conical thread; 203. a downward inclined triangle body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of 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 thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, one embodiment of the present invention is provided: a combined type expansion screw comprises a threaded shaft structure 1, wherein the threaded shaft structure 1 comprises a rod piece 101, a screw thread 102 and an upper inclined triangular body 103, the screw thread 102 is arranged on the outer surface of the rod piece 101, and the upper inclined triangular body 103 is arranged on the lower side surface of the screw thread 102;

the upper end of the rod member 101 is in threaded connection with a conical structure 2, the conical structure 2 comprises a conical body 201, conical body threads 202 and a downward-inclined triangular body 203, the conical body threads 202 are arranged on the inner surface of the conical body 201, the downward-inclined triangular body 203 is arranged on the lower side surface of the conical body threads 202, an expansion pipe 3 is connected to the outer surface of the conical structure 2 in a matched mode, the expansion pipe 3 is connected with a threaded shaft structure 1 in a matched mode, a nut 5 is connected to the lower end of the threaded shaft structure 1 in a threaded mode, a gasket 4 is arranged on the upper side of the nut 5, the lower surface of the expansion pipe 3 and the upper surface of the gasket 4 are located in the same plane, and the gasket 4 has a blocking effect on the expansion pipe 3, the upper inclined triangular body 103 and the lower inclined triangular body 203 are arranged in the threaded shaft structure 1 and the conical structure 2, so that the combined expansion screw can only be rotated positively and can not be rotated reversely, the fastening effect of the combined expansion screw is ensured when the combined expansion screw is used, and the phenomenon of screw slipping of the combined expansion screw is avoided.

The working principle is as follows: the conical structure 2 is in threaded connection with the threaded shaft structure 1, the lower surface of the upper oblique triangular body 103 is an inclined plane, the right side surface of the upper oblique triangular body is a vertical plane, the upper surface of the lower oblique triangular body 203 is an only inclined plane, the left side surface of the upper oblique triangular body is a vertical plane, when the upper oblique triangular body 103 is rotated forwardly, the inclined plane of the lower oblique triangular body 203 is contacted with the inclined plane of the upper oblique triangular body 103, namely, the rotation forwardly can be realized, when the upper oblique triangular body 103 is rotated reversely, the vertical plane box of the lower oblique triangular body 203 is contacted, so that the reverse rotation is blocked, the combined type expansion screw is prevented from sliding, and the combined type expansion screw cannot be loosened even if the high-frequency vibration occurs.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. A modular inflation screw, includes threaded shaft structure (1), its characterized in that: the threaded shaft structure (1) comprises a rod piece (101), a screw thread (102) and an upper inclined triangular body (103), the screw thread (102) is arranged on the outer surface of the rod piece (101), and the upper inclined triangular body (103) is arranged on the lower side surface of the screw thread (102);

the upper end threaded connection of member (101) has toper structure (2), toper structure (2) are including conical body (201), conical body screw thread (202) and triangle body (203) to one side down, the internal surface of conical body (201) is provided with conical body screw thread (202), the downside of conical body screw thread (202) is provided with triangle body (203) to one side down, the surface cooperation of toper structure (2) is connected with expansion pipe (3).

2. The modular expansion screw of claim 1, further comprising: the expansion pipe (3) is connected with the threaded shaft structure (1) in a matched mode.

3. The modular expansion screw of claim 1, further comprising: the lower end of the threaded shaft structure (1) is in threaded connection with a nut (5), and a gasket (4) is arranged on the upper side of the nut (5).

4. The modular expansion screw of claim 1, further comprising: the lower surface of the expansion pipe (3) and the upper surface of the gasket (4) are positioned in the same plane.