CN218787231U

CN218787231U - Expansion screw

Info

Publication number: CN218787231U
Application number: CN202223112811.XU
Authority: CN
Inventors: 林明水
Original assignee: Guangdong Jiehao Hardware Technology Co ltd
Current assignee: Guangdong Jiehao Hardware Technology Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-04-04
Anticipated expiration: 2032-11-21

Abstract

The utility model discloses an expansion screw, the electric iron comprises a screw rod, the surface cover of screw rod is equipped with first expansion pipe, the fixed surface of screw rod is connected with rhombus piece, the surface cover of screw rod is equipped with the second expansion pipe, the inside of first expansion pipe is equipped with fixing device. The utility model discloses when using, this inflation screw can effectually prevent to drop between screw rod and first expansion pipe, the second expansion pipe through setting up fixing device, can increase the area of contact between first expansion pipe and the second expansion pipe and the drilling through fin, water chestnut type piece, fixed block and first loop type board, prevents that first expansion pipe and second expansion pipe from droing, easy operation, and the practicality is high.

Description

Expansion screw

Technical Field

The utility model relates to a screw technical field especially relates to an 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, the other end of the screw is provided with a taper, an iron sheet (or a steel pipe) covers the screw, a plurality of notches are arranged on one half of an iron sheet cylinder (the steel pipe), the iron sheet cylinder (the steel pipe) and the screw are plugged into a hole drilled on a wall, then a nut is locked, the screw is pulled outwards by the nut, the taper is pulled into the iron sheet cylinder, and the iron sheet cylinder is expanded and then is tightly fixed on the wall, and the screw is generally used for fastening protective guards, rain awnings, air conditioners and other materials on cement, bricks and the like.

The expansion screw is characterized in that the expansion screw is arranged on the base, the expansion screw is arranged on the expansion screw, and the expansion screw is arranged on the base.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an expansion screw.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the expansion screw comprises a screw rod, wherein a first expansion pipe is sleeved on the outer surface of the screw rod, a diamond-shaped block is fixedly connected to the surface of the screw rod, a second expansion pipe is sleeved on the outer surface of the screw rod, and a fixing device is arranged inside the first expansion pipe.

Furthermore, the fixing device comprises first holes symmetrically formed in the first expansion pipe, ladder-shaped blocks are connected to the inner portions of the two first holes in a sliding mode, springs are arranged on the surfaces of the ladder-shaped blocks, two ends of each spring are fixedly connected with the ladder-shaped blocks and the inner walls of the first holes respectively, and the diamond-shaped blocks correspond to the ladder-shaped blocks.

Furthermore, second openings are formed in two sides of the outer surface of the first expansion pipe, a fin is fixedly and movably connected to the outer surface of the first expansion pipe, fixing blocks corresponding to the second openings are symmetrically and fixedly connected to the outer surface of the diamond-shaped block, and a second annular plate is fixedly connected to the outer surface of the first expansion pipe.

Furthermore, the outer surface of the second expansion pipe is fixedly connected with a first annular plate, and the outer surface of the second expansion pipe is provided with a crack.

Furthermore, the outer surface of the screw rod is in threaded connection with a first nut and a second nut, and a spring washer is arranged between the first nut and the second nut.

Furthermore, a flat washer is arranged between the second nut and the first expansion pipe.

Furthermore, the lower surface of the screw rod is fixedly connected with a conical block.

The utility model has the advantages that:

the utility model discloses when using, this inflation screw can effectually prevent to drop between screw rod and first expansion pipe, the second expansion pipe through setting up fixing device, can increase the area of contact between first expansion pipe and second expansion pipe and the drilling through fin, water chestnut type piece, fixed block and first loop type board, prevents that first expansion pipe and second expansion pipe from droing, easy operation, and the practicality is high.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2 according to the present invention.

Illustration of the drawings:

1. a screw; 2. a first expansion tube; 3. a rhombus-shaped block; 4. a second expansion tube; 5. a first opening; 6. a ladder-shaped block; 7. a spring; 8. a second annular plate; 9. a second opening; 10. a fin; 11. a fixed block; 12. a first ring-shaped plate; 13. a breach; 14. a first nut; 15. a second nut; 16. a spring washer; 17. a flat washer; 18. and (5) square blocks.

Detailed Description

Referring to fig. 1 to 3, an expansion screw is provided, which includes a screw rod 1, and is characterized in that: the outer surface cover of screw rod 1 is equipped with first expansion pipe 2, and the fixed surface of screw rod 1 is connected with rhombus piece 3, and the outer surface cover of screw rod 1 is equipped with second expansion pipe 4, and the inside of first expansion pipe 2 is equipped with fixing device.

Fixing device sets up first trompil 5 inside first expansion pipe 2 including the symmetry, the equal sliding connection in inside of two first trompils 5 has trapezoidal piece 6, the surface of trapezoidal piece 6 is equipped with spring 7, spring 7's both ends respectively with the inner wall fixed connection of trapezoidal piece 6 and first trompil 5, diamond piece 3 is corresponding with trapezoidal piece 6, it can drive trapezoidal piece 6 and remove to remove through 3 removals of diamond piece, increase screw rod 1 and outside contact, prevent simultaneously that first expansion pipe 2 from droing.

Second trompil 9 has been seted up to the surface both sides of first expansion pipe 2, the solid swing joint of surface of first expansion pipe 2 has fin 10, the fixed block 11 corresponding with second trompil 9 of the outer surface symmetry fixedly connected with of diamond-shaped piece 3, the outer fixed surface of first expansion pipe 2 is connected with second circular template 8, diamond-shaped piece 3 and fixed block 11 can be fixed first expansion pipe 2, prevent that first expansion pipe 2 from rocking and droing.

The outer surface of the second expansion pipe 4 is fixedly connected with a first annular plate 12, the outer surface of the second expansion pipe 4 is provided with a split 13, the first annular plate 12 and the split 13 can increase the friction force between the second expansion pipe 4 and a drill hole,

the outer surface of the screw rod 1 is connected with a first nut 14 and a second nut 15 in a threaded mode, a spring washer 16 is arranged between the first nut 14 and the second nut 15, and the spring washer 16 increases friction force between the first nut 14 and the screw rod 1, between the second nut 15 and the screw rod 1.

A flat washer 17 is arranged between the second nut 15 and the first expansion pipe 2, and the flat washer 17 prevents the second nut 15 and the first expansion pipe 2 from falling off.

The lower surface of the screw 1 is fixedly connected with a square block 18, and the area contact of the second expansion pipe 4 and the drilled hole is increased.

Using the inflation screw, when needs use the inflation screw, through putting into the drilling with the inflation screw in, through rotating first nut 14 and second nut 15, make screw rod 1 rebound, diamond piece 3 drives trapezoidal piece 6 and removes simultaneously, and then realized preventing that screw rod 1 from droing with first expansion pipe 2 and second expansion pipe 4, fin 10 moves simultaneously, make fixed block 11 and second trompil 9 joint, square 18 makes breach 13 move simultaneously, and then increased the contact between inflation screw and the drilling, make difficult the droing, and the operation is simple, and the practicality is high.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An expansion screw, comprising a screw (1), characterized in that: the outer surface cover of screw rod (1) is equipped with first expansion pipe (2), the fixed surface of screw rod (1) is connected with rhombus piece (3), the outer surface cover of screw rod (1) is equipped with second expansion pipe (4), the inside of first expansion pipe (2) is equipped with fixing device.

2. An expansion screw according to claim 1, wherein: fixing device sets up first trompil (5) inside first expansion pipe (2) including the symmetry, two equal sliding connection in inside of first trompil (5) has trapezoidal piece (6), the surface of trapezoidal piece (6) is equipped with spring (7), the both ends of spring (7) respectively with the inner wall fixed connection of trapezoidal piece (6) and first trompil (5), rhombus piece (3) are corresponding with trapezoidal piece (6).

3. An expansion screw according to claim 1, characterized in that: second trompil (9) have been seted up to the surface both sides of first expansion pipe (2), the surface swing joint of first expansion pipe (2) has fin (10), the surface symmetry fixedly connected with of rhombus piece (3) and second trompil (9) corresponding fixed block (11), the surface fixed connection of first expansion pipe (2) has second circular template (8).

4. An expansion screw according to claim 1, characterized in that: the outer surface of the second expansion pipe (4) is fixedly connected with a first annular plate (12), and the outer surface of the second expansion pipe (4) is provided with a split (13).

5. An expansion screw according to claim 1, characterized in that: the outer surface of the screw rod (1) is in threaded connection with a first nut (14) and a second nut (15), and a spring washer (16) is arranged between the first nut (14) and the second nut (15).

6. An expansion screw according to claim 5, wherein: and a flat washer (17) is arranged between the second nut (15) and the first expansion pipe (2).

7. An expansion screw according to claim 1, wherein: the lower surface of the screw rod (1) is fixedly connected with a square block (18).