CN215409635U

CN215409635U - Fastening screw convenient to lock

Info

Publication number: CN215409635U
Application number: CN202121497546.4U
Authority: CN
Inventors: 戴元本
Original assignee: Dongtai Qb Stainless Steel Co ltd
Current assignee: Dongtai Qb Stainless Steel Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2022-01-04
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a fastening screw convenient to lock, which comprises a threaded column and a conical expansion main body, wherein a hexagonal nut is fixedly installed at the center of the top of the threaded column, a circular through hole is formed in the center of the hexagonal nut, an external thread is formed on the outer surface of the threaded column, the interior of the threaded column is hollow, an internal thread is formed in the hollow position of the interior of the threaded column, the conical expansion main body is fixedly connected to the bottom of the threaded column, and an extrusion main body is installed in the threaded column. According to the utility model, the conical expansion main body and the extrusion main body are arranged, the extrusion main body rotates downwards in the threaded column, and at the moment, the conical trapezoidal column arranged at the bottom of the extrusion main body begins to downwards extrude the inner side wall of the expansion component, so that the bottom of the expansion component uniformly expands outwards, the conical expansion main body is firmly clamped in the device, and further the fastening screw is fixedly arranged in the device and cannot be loosened, and the mounting stability of the fastening screw is improved.

Description

Fastening screw convenient to lock

Technical Field

The utility model relates to the technical field of fastening screw locking, in particular to a fastening screw convenient to lock.

Background

The screw is a common fastener and is widely used in machinery, electrical appliances and buildings. Generally, the material is metal or plastic, and is cylindrical, and the grooves with the concave and convex surfaces are called as screw threads.

The existing screw is often withdrawn from the screw hole due to external factors after being installed in the screw hole, so that a fixed object can not be completely fixed, and even greater potential safety hazards can exist when the screw is used in special occasions.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a fastening screw which is easy to lock, and solves the above problems of the related art.

In order to achieve the purpose, the utility model provides the following technical scheme: a fastening screw convenient to lock comprises a threaded column and a conical expansion main body, wherein a hexagonal nut is fixedly installed at the center of the top of the threaded column, a circular through hole is formed in the center of the hexagonal nut, an external thread is formed on the outer surface of the threaded column, the interior of the threaded column is hollow, an internal thread is formed in the hollow position of the interior of the threaded column, the conical expansion main body is fixedly connected to the bottom of the threaded column, and an extrusion main body is installed in the threaded column;

the conical expansion main body comprises four expansion components, conical holes and conical threads, the conical holes are formed in the middle of the conical expansion main body surrounded by the four expansion components, and the conical threads are continuously formed in the outer surface of each expansion component;

the extrusion main body comprises a conical trapezoidal column, surface threads, an extrusion column and a cross groove, the surface threads are formed in the side face of the extrusion column, the cross groove is formed in the top of the extrusion column, and the conical trapezoidal column is fixedly installed at the bottom of the extrusion column.

Preferably, the diameter of the circular through hole is larger than that of the internal thread.

Preferably, the surface thread is matched with the internal thread.

Preferably, the top of the expansion assembly is fixedly welded to the bottom of the threaded column.

Preferably, the top of the threaded column is fixedly welded and installed in the middle of the bottom of the hexagonal nut.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the conical expansion main body and the extrusion main body are arranged, the extrusion main body rotates downwards in the threaded column, and then the conical trapezoidal column arranged at the bottom of the extrusion main body begins to extrude the inner side wall of the expansion component downwards, so that the bottom of the expansion component uniformly expands outwards, and further the outer side wall of the expansion component begins to extrude the inner wall of the device, so that the conical expansion main body is firmly clamped in the device, and further the fastening screw is fixedly arranged in the device and cannot be loosened, and the mounting stability of the fastening screw is improved.

2. According to the utility model, the surface threads and the internal threads are arranged in a matched manner through the internal threads and the surface threads, so that the extrusion main body can be stably lifted in the threaded column, the inner side wall of the expansion component can be stably extruded by the conical trapezoidal column, the bottom of the expansion component can be stably and uniformly expanded outwards, the expansion component is prevented from being deformed due to overlarge extrusion force, and the beneficial effect of improving the installation stability is achieved.

Drawings

FIG. 1 is an exploded view of a body of the present invention;

FIG. 2 is an assembled view of the body of the present invention;

fig. 3 is a schematic view of the locking structure of the present invention.

In the figure: the device comprises a 1-hexagonal nut, a 2-circular through hole, a 3-internal thread, a 4-threaded column, a 5-external thread, a 6-conical expansion body, a 7-expansion component, an 8-conical hole, a 9-conical thread, a 10-conical trapezoidal column, a 11-surface thread, a 12-extrusion column, a 13-cross groove and a 14-extrusion 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.

Referring to fig. 1-3, an embodiment of the present invention is shown: a fastening screw convenient to lock comprises a threaded column 4 and a conical expansion main body 6, wherein a hexagonal nut 1 is fixedly installed at the center of the top of the threaded column 4, a circular through hole 2 is formed in the center of the hexagonal nut 1, an external thread 5 is formed in the outer surface of the threaded column 4, the interior of the threaded column 4 is hollow, an internal thread 3 is formed in the hollow position of the interior of the threaded column 4, the conical expansion main body 6 is fixedly connected to the bottom of the threaded column 4, and an extrusion main body 14 is installed in the threaded column 4;

the conical expansion main body 6 comprises four expansion components 7, conical holes 8 and conical threads 9, the conical expansion main body 6 is surrounded by the four expansion components 7, the conical holes 8 are formed in the middle of the conical expansion main body 6, and the conical threads 9 are continuously formed in the outer surface of each expansion component 7;

the extrusion main body 14 comprises a conical trapezoidal column 10, surface threads 11, an extrusion column 12 and a cross groove 13, the surface threads 11 are formed in the side surface of the extrusion column 12, the cross groove 13 is formed in the top of the extrusion column 12, and the conical trapezoidal column 10 is fixedly installed at the bottom of the extrusion column 12;

the diameter of the circular through hole 2 is larger than that of the internal thread 3, so that the extrusion main body 14 can be conveniently installed into the internal thread 3 through the circular through hole 2; the surface thread 11 and the internal thread 3 are installed in a matched mode, the surface thread 11 and the internal thread 3 are installed in a matched mode through threads, the extrusion main body 14 can be stably lifted in the threaded column 4, the inner side wall of the expansion component 7 can be stably extruded by the conical trapezoidal column 10, and the bottom of the expansion component 7 is stably and uniformly expanded outwards; the top of the expansion component 7 is fixedly welded and installed at the bottom of the threaded column 4, so that the threaded column 4 and the conical expansion main body 6 are integrally formed, and the threaded column 4 and the conical expansion main body 6 can conveniently rotate synchronously to advance and retreat; the top fixed welding of screw thread post 4 installs in the bottom intermediate position of hexagon nut 1, is convenient for drive screw thread post 4 synchronous revolution through revolving wrong hexagon nut 1.

The working principle is as follows: as shown in fig. 1-3, in use, a user first presses the bottom of the conical expansion body 6 of the fastening screw against the surface of the device to be installed with the fastening screw, covers the periphery of the hexagon nut 1 with an external hexagon wrench, starts to screw the external hexagon wrench to drive the hexagon nut 1 to rotate, and applies a pressing force to the top of the hexagon nut 1 while screwing so that the bottom of the conical expansion body 6 of the fastening screw is rotatably drilled into the surface of the device until the fastening screw is installed into the device;

then, the bottom of the extrusion main body 14 penetrates through the circular through hole 2 and extends into the internal thread 3, so that the surface threads 11 are installed in the internal thread 3 in a matching mode, a cross screwdriver is inserted into the cross groove 13 to drive the extrusion main body 14 to rotate downwards in the threaded column 4 until the conical trapezoidal column 10 installed at the bottom of the extrusion main body 14 is inserted into the tapered hole 8, the cross screwdriver is continuously used for screwing to drive the extrusion main body 14 to rotate downwards in the threaded column 4, at this time, the conical trapezoidal column 10 installed at the bottom of the extrusion main body 14 starts to downwards extrude the inner side wall of the expansion component 7, the bottom of the expansion component 7 is uniformly expanded outwards, the outer side wall of the expansion component 7 starts to extrude the inner wall of the device, and the conical expansion main body 6 is firmly clamped in the device, so that the fastening screw is fixedly installed in the device and cannot be loosened.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A fastening screw facilitating locking, comprising a threaded post (4) and a conical expansion body (6), characterized in that: a hexagonal nut (1) is fixedly installed at the center of the top of the threaded column (4), a circular through hole (2) is formed in the center of the hexagonal nut (1), an external thread (5) is formed in the outer surface of the threaded column (4), the threaded column (4) is hollow, an internal thread (3) is formed in the hollow position of the interior of the threaded column (4), a conical expansion main body (6) is fixedly connected to the bottom of the threaded column (4), and an extrusion main body (14) is installed in the threaded column (4);

the conical expansion main body (6) comprises four expansion components (7), conical holes (8) and conical threads (9), the conical expansion main body (6) is surrounded by the four expansion components (7), the conical holes (8) are formed in the middle of the conical expansion main body (6), and the conical threads (9) are continuously formed on the outer surface of each expansion component (7);

the extrusion main body (14) comprises a conical trapezoidal column (10), surface threads (11), an extrusion column (12) and a cross groove (13), the surface threads (11) are formed in the side face of the extrusion column (12), the cross groove (13) is formed in the top of the extrusion column (12), and the conical trapezoidal column (10) is fixedly installed at the bottom of the extrusion column (12).

2. A fastening screw for facilitating locking according to claim 1, wherein: the diameter of the circular through hole (2) is larger than that of the internal thread (3).

3. A fastening screw facilitating locking according to claim 2, wherein: the surface thread (11) is matched with the internal thread (3) for installation.

4. A fastening screw facilitating locking according to claim 3, wherein: the top of the expansion component (7) is fixedly welded and installed at the bottom of the threaded column (4).

5. A fastening screw facilitating locking according to claim 4, wherein: the top of the threaded column (4) is fixedly welded and installed in the middle of the bottom of the hexagonal nut (1).