CN215409632U

CN215409632U - Novel expansion screw capable of reducing construction failure rate

Info

Publication number: CN215409632U
Application number: CN202121462453.8U
Authority: CN
Inventors: 李彬
Original assignee: Tianjin Tianyu Tongtian Precision Fastener Co ltd
Current assignee: Tianjin Tianyu Tongtian Precision Fastener Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-01-04
Anticipated expiration: 2031-06-28

Abstract

The utility model discloses a novel expansion screw capable of reducing construction failure rate, which comprises an expansion pipe, a main body component and a resistance-increasing component, wherein the main body component comprises a pull rod and a first conical seat, the first conical seat is arranged at the lower end of the pull rod and is in contact with the inner edge of the expansion pipe, the expansion pipe can be preliminarily deformed and friction force can be increased by matching with the first conical seat, a nut is connected to the surface of the pull rod through threads, and a gasket is arranged between the nut and the expansion pipe. The utility model discloses a through setting up the rib, turn that tight nut cooperates No. one conical seat to make the expand tube lower extreme when to outside bulging deformation, through the clearance between increase expand tube that the rib can be further and the mounting hole inner wall, increase frictional force simultaneously improves the stability of expansion screw when installing in the mounting hole is inside from this to difficult not hard up, the shape of cross section is oval-shaped rib, can not lead to the fact the hindrance in the inside process of mounting hole to expansion screw whole.

Description

Novel expansion screw capable of reducing construction failure rate

Technical Field

The utility model belongs to the technical field of expansion screws, and particularly relates to a novel expansion screw capable of reducing the construction failure rate.

Background

At present, expansion screws in the hardware field are all mechanical structures, so that the shell is stressed to expand, and the expansion screws are fixed in mounting holes.

Through retrieval, chinese patent discloses a novel expansion screw (publication number CN103452980 a3), and this patent technology increases stability through the bulge contacts with the interior bulge to increase the expansion point of the expand tube, but expand tube and mounting hole inner wall frictional force is less, if external force is great when the construction, the expansion screw is very easily become flexible and drop, stability is relatively poor, therefore, technical staff in the field provides a novel expansion screw that can reduce the construction failure rate to solve the problem that proposes in the above-mentioned background art.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a novel expansion screw capable of reducing the construction failure rate, which increases the stability of the expansion screw when the expansion screw is installed in an installation hole by increasing the friction force between an expansion pipe and the inner wall of the installation hole, and improves the installation power.

In order to achieve the purpose, the utility model provides the following technical scheme:

a novel expansion screw capable of reducing construction failure rate comprises an expansion pipe, a main body assembly and a resistance increasing assembly, wherein the main body assembly comprises a pull rod and a first conical seat, the first conical seat is arranged at the lower end of the pull rod and is in contact with the inner edge of the expansion pipe, the expansion pipe can be preliminarily deformed and friction force can be increased by matching with the first conical seat, a nut is connected to the surface of the pull rod through threads, a gasket is arranged between the nut and the expansion pipe, and the gasket can prevent a worker from applying excessive pressure to the expansion pipe through the nut;

the resistance increasing assembly comprises a supporting piece, ribs and resistance increasing blocks, the supporting piece is arranged on the inner wall of the expansion pipe, the resistance increasing blocks are arranged on the surface of the supporting piece, and the stability of the expansion screw in installation on the inner wall of the installation hole can be improved through the ribs and the resistance increasing blocks.

Furthermore, four openings which are distributed annularly are formed in the surface of the expansion pipe, and the ribs are arranged on the surface of the expansion pipe and located between two adjacent openings;

through above-mentioned technical scheme, when turning that tight nut cooperates a conical seat to make the expand tube lower extreme to outside bulging deformation, increase the clearance between expand tube and the mounting hole inner wall that can step forward through the rib, increase frictional force simultaneously, improve the stability of expansion screw when installing in the mounting hole inside from this.

Furthermore, the number of the ribs is two, and the cross sections of the ribs and the resistance increasing blocks are oval;

through above-mentioned technical scheme, the cross sectional shape is oval rib, can not cause the hindrance in the inside process of mounting hole to the whole placing of expansion screw to can make the expand tube when the deformation inflation and the mounting hole inner wall between frictional force bigger through the rib that quantity is two.

Furthermore, a second conical seat is arranged on the surface of the pull rod, and an inner convex ring capable of contacting with the second conical seat is arranged on the inner edge of the supporting sheet;

through above-mentioned technical scheme, when turning the lock nut and making the pull rod move up in the mounting hole is inside, No. two taper seats can contact with interior cam, and under the effect of pressure, the brace piece can be to the upset of expand tube outside low-angle, and the cooperation increases the piece that hinders, can increase frictional force between expand tube and the mounting hole once more and the area of contact of expand tube and mounting hole inner wall, makes the inflation screw better at the inside steadiness of mounting hole.

Furthermore, the diameter of the upper end of the first conical seat is longer than that of the lower end of the second conical seat;

through above-mentioned technical scheme, when the pull rod cooperation nut moved up, No. two awl seats only can make the stay plate warp and the upset, can not make the expand tube take place to deform at the in-process that moves up.

Furthermore, the number of the support pieces is four, the support pieces are annularly distributed on the inner wall of the expansion pipe, and the diameter of the overlooking cross section of each support piece is smaller than the diameter of the outer edge of the expansion pipe;

through above-mentioned technical scheme, quantity is four and for the support piece that the annular distributes, can make area of contact and frictional force better between expand tube and the mounting hole inner wall, more difficult the inside not hard up of mounting hole, further promotes the holistic fixity of expansion screw.

In conclusion, the utility model has the following beneficial effects:

1. through setting up the rib, turn that tight nut cooperates No. one conical seat to make the expand tube lower extreme when to outside bulging deformation, through the clearance between increase expand tube that the rib can be further and the mounting hole inner wall, increase frictional force simultaneously improves the stability of expansion screw when installing in the mounting hole inside from this to be difficult not hard up, the cross sectional shape is oval-shaped rib, can not lead to the fact the hindrance in the inside process of mounting hole to expansion screw whole placement.

2. Through setting up the stay chip, when turning tight nut and making the pull rod move up in the mounting hole is inside, No. two taper seats can contact with interior cam, and under the effect of pressure, the stay chip can be to the upset of expand tube outside low-angle, and the cooperation increases the piece that hinders, can increase frictional force between expand tube and the mounting hole once more and the area of contact of expand tube and mounting hole inner wall, makes the inflation screw better at the inside steadiness of mounting hole.

Drawings

FIG. 1 is a perspective view of the present embodiment;

FIG. 2 is a perspective view of the present embodiment;

fig. 3 is a perspective view of the tube expansion of the present embodiment.

Description of reference numerals: 1. expanding the tube; 2. a body assembly; 201. a pull rod; 202. a first conical seat; 203. a second cone base; 3. a nut; 4. a gasket; 5. a resistance increasing component; 501. supporting the sheet; 502. ribs; 503. a resistance increasing block; 6. an inner collar.

Detailed Description

Example (b):

the present invention is described in further detail below with reference to figures 1-3.

A can reduce the new expansion screw of the failure rate of construction, including the expand tube 1, the body module 2 and increase and hinder the assembly 5, the body module 2 includes tie rod 201 and a conical seat 202, a conical seat 202 sets up in the lower extreme of tie rod 201 and contacts with inner edge of expand tube 1, when the expand tube 1 locates in the mounting hole, and the tie rod 201 moves up under the exogenic action constantly, cooperate a conical seat 202 can make the expand tube 1 take place deformation tentatively, and increase the frictional force between the inner wall of mounting hole and the expand tube 1 tentatively, the surface threaded connection of the tie rod 201 has nuts 3, there are gaskets 4 between 1 and the expand tube 3, the gasket 4 can avoid the staff to give the expand tube 1 the excessive pressure through the nut 3, lead to the expand tube 1 to deform and damage, influence the fixed effect;

the resistance-increasing component 5 comprises a supporting sheet 501, a rib 502 and a resistance-increasing block 503, the supporting sheet 501 is arranged on the inner wall of the expansion pipe 1, the resistance-increasing block 503 is arranged on the surface of the supporting sheet 501, the friction force between the expansion pipe 1 and the inner wall of the mounting hole can be increased through the rib 502 and the resistance-increasing block 503, the stability of the expansion screw when the expansion screw is mounted on the inner wall of the mounting hole is improved, and the expansion screw is not easy to loosen;

four openings are formed in the surface of the expansion pipe 1 and are distributed in an annular mode, the ribs 502 are arranged on the surface of the expansion pipe 1 and located between two adjacent openings, when the lower end of the expansion pipe 1 expands and deforms outwards by matching the tightening nut 3 with the one-number conical seat 202, the gap between the expansion pipe 1 and the inner wall of the mounting hole can be further increased through the ribs 502, and meanwhile, the friction force is increased, so that the stability of the expansion screw when the expansion screw is mounted in the mounting hole is improved, the number of the ribs 502 is two, the cross sections of the ribs 502 and the resistance increasing block 503 are both oval, the ribs 502 with the oval cross sections do not obstruct the whole process that the expansion screw is placed in the mounting hole, the friction force between the expansion pipe 1 and the inner wall of the mounting hole during deformation and expansion can be larger through the two ribs 502, the second-number conical seat 203 is arranged on the surface of the pull rod 201, the inner edge of the supporting sheet 501 is provided with an inner convex ring 6 which can be contacted with the second conical seat 203, when the nut 3 is turned tightly and the pull rod 201 moves upwards in the mounting hole, the second conical seat 203 can be contacted with the inner convex ring 6, the supporting sheet 501 can turn over towards the outer side of the expansion pipe 1 at a small angle under the action of pressure, and the friction force between the expansion pipe 1 and the mounting hole and the contact area between the expansion pipe 1 and the inner wall of the mounting hole can be increased again by matching with the resistance increasing block 503, so that the stability of the expansion screw in the mounting hole is better;

the upper end diameter of a awl seat 202 is longer than the lower extreme diameter of No. two awl seats 203, when pull rod 201 cooperation nut 3 moves up, No. two awl seats 203 only can make the stay piece 501 warp and upset, can not make the expand tube 1 take place deformation at the in-process that shifts up, the quantity of stay piece 501 is four and for the annular distribution at the inner wall of expand tube 1, the outer fringe diameter that the cross section diameter is less than expand tube 1 is overlooked to the stay piece 501, quantity is four and for the stay piece 501 of annular distribution, can make area of contact and frictional force better between expand tube 1 and the mounting hole inner wall, more difficult in the inside not hard up of mounting hole, further promote the holistic fixity of expansion screw.

The working principle is as follows: firstly, the whole expansion screw is placed in a mounting hole which is drilled in advance, then the nut 3 is rotated by means of a tool, when the nut 3 is rotated and tightened and is matched with a conical seat 202 to ensure that the lower end of the expansion pipe 1 is expanded and deformed outwards, the gap between the expanding pipe 1 and the inner wall of the mounting hole can be further increased through the ribs 502, meanwhile, the friction force is increased, thereby improving the stability when the expansion screw is arranged in the mounting hole, the friction force between the expansion pipe 1 and the inner wall of the mounting hole can be larger when the expansion pipe is deformed and expanded through the two ribs 502, meanwhile, the second-order taper seat 203 can be contacted with the inner convex ring 6, under the effect of pressure, the support piece 501 can overturn towards the small angle of the outer side of the expansion pipe 1, and the friction force between the expansion pipe 1 and the mounting hole and the contact area between the expansion pipe 1 and the inner wall of the mounting hole can be increased by matching the resistance increasing block 503, so that the stability of the expansion screw in the mounting hole is better.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a can reduce construction failure rate's novel expansion screw, includes expand tube (1), main part subassembly (2) and resistance-increasing subassembly (5), its characterized in that: the main body component (2) comprises a pull rod (201) and a first conical seat (202), the first conical seat (202) is arranged at the lower end of the pull rod (201) and is in contact with the inner edge of the expansion pipe (1), a nut (3) is in threaded connection with the surface of the pull rod (201), and a gasket (4) is arranged between the nut (3) and the expansion pipe (1);

the resistance-increasing component (5) comprises a supporting sheet (501), ribs (502) and resistance-increasing blocks (503), wherein the supporting sheet (501) is arranged on the inner wall of the expansion pipe (1), and the resistance-increasing blocks (503) are arranged on the surface of the supporting sheet (501).

2. The new expansion screw capable of reducing the failure rate of construction according to claim 1, characterized in that: the surface of the expanding tube (1) is provided with four openings which are distributed annularly, and the ribs (502) are arranged on the surface of the expanding tube (1) and positioned between two adjacent openings.

3. The new expansion screw capable of reducing the failure rate of construction according to claim 2, characterized in that: the number of the ribs (502) is two, and the cross sections of the ribs (502) and the resistance-increasing blocks (503) are oval.

4. The new expansion screw capable of reducing the failure rate of construction according to claim 1, characterized in that: the surface of the pull rod (201) is provided with a second-size cone seat (203), and the inner edge of the support sheet (501) is provided with an inner convex ring (6) capable of contacting with the second-size cone seat (203).

5. The novel expansion screw capable of reducing the failure rate of construction according to claim 4, characterized in that: the diameter of the upper end of the first conical seat (202) is longer than that of the lower end of the second conical seat (203).

6. The novel expansion screw capable of reducing the failure rate of construction according to claim 4, characterized in that: the number of the support pieces (501) is four, the support pieces are annularly distributed on the inner wall of the expansion pipe (1), and the overlooking cross section diameter of each support piece (501) is smaller than the outer edge diameter of the expansion pipe (1).