CN217814381U

CN217814381U - High-strength expansion screw

Info

Publication number: CN217814381U
Application number: CN202222197986.9U
Authority: CN
Inventors: 王赛雄; 王艺博
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-11-15
Anticipated expiration: 2032-08-19

Abstract

The utility model relates to the technical field of expansion screws, and provides a high-strength expansion screw, which comprises a screw rod, wherein one end of the screw rod is a threaded part, the other end of the screw rod is a polished rod part, and the polished rod part is connected with an end cap; the first expansion pipe is sleeved on the polished rod part, and one end of the first expansion pipe is in contact with the plug; a nut disposed on the threaded portion; the second expansion pipe is sleeved on the light rod part and the threaded part and is positioned between the first expansion pipe and the screw cap; the first expansion pipe and the second expansion pipe are provided with barb rings, and the barb rings are positioned at one end close to the screw cap; through above-mentioned technical scheme, can take place pivoted problem among the prior art for a long time between expansion bolts and the building.

Description

High-strength expansion screw

Technical Field

The utility model relates to an expansion screw technical field, it is specific, relate to a high-strength expansion screw.

Background

The fastener is a mechanical part which is used for fastening connection and has wide application, can be widely applied to various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical engineering, instruments, supplies and the like, can see various fasteners, and has large demand. Common fasteners are bolts, studs, screws, nuts, self-tapping screws, expansion screws, and the like.

However, in the prior art, a hole is usually punched in a building, an expansion pipe is sleeved on a polished rod portion of a screw rod with one end serving as a conical plug, the expansion pipe and the polished rod portion are hammered into the hole, a fastener to be fastened is sleeved on a threaded portion of the screw rod, a nut is screwed to move the screw rod, so that the conical plug presses the expansion pipe, the expansion pipe is expanded, connection and fastening are completed, and after the expansion pipe is used for a long time, the expansion bolt and the building can rotate, and fastening effect is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high-strength expansion screw has solved and has used for a long time among the correlation technique expansion bolts and the building between can take place the pivoted problem.

The technical scheme of the utility model as follows:

a high-strength expansion screw comprises

One end of the screw rod is a threaded part, the other end of the screw rod is a polished rod part, and the polished rod part is connected with a plug;

the first expansion pipe is sleeved on the light rod part, and one end of the first expansion pipe is in contact with the plug;

a nut disposed on the threaded portion;

also comprises

The second expansion pipe is sleeved on the polished rod part and the threaded part and is positioned between the first expansion pipe and the screw cap;

the first expansion pipe with the second expansion pipe all has the barb circle, the barb circle is located and is close to the one end of nut.

According to a further technical scheme, the plug is of a conical structure, friction spines are arranged on the first expansion pipe and the second expansion pipe, and the friction spines are of a polygonal structure.

The further technical proposal also comprises

And the middle explosion ring is sleeved on the screw rod and is positioned between the first expansion pipe and the second expansion pipe, and the diameter of the outer surface of the middle explosion ring is gradually reduced from the middle to two ends.

According to a further technical scheme, the first expansion pipe and the second expansion pipe are provided with expansion grooves, the length direction of each expansion groove is the same as the length direction of the corresponding screw, the expansion grooves are provided with a plurality of expansion grooves, and the expansion grooves are arrayed along the circumferential direction of the first expansion pipe or the second expansion pipe.

Make further technical scheme, the barb circle is the toper structure, the conical surface of barb circle with the conical surface of end cap sets up relatively, just the barb circle comprises a plurality of triangle-shaped's barb.

According to a further technical scheme, a gasket is further arranged between the second expansion pipe and the nut, the first expansion pipe and the second expansion pipe are provided with notches, and the notches are communicated with the expansion grooves.

The utility model discloses a theory of operation and beneficial effect do:

1. the utility model discloses it sets up into first expansion pipe and second expansion pipe to be single expansion pipe components of a whole that can function independently, first expansion pipe is the expansion pipe of fixed length, the second expansion pipe has a plurality of kinds of length, when the fastening of the part of the thickness of carrying out the difference, it can to change corresponding second expansion pipe, and can establish first expansion pipe with the screw rod cover and then inject the downthehole that drills out on the building, then inject corresponding second expansion pipe, need not to carry out the dismouting with the screw rod repeatedly, if it is enough to make clear the drilling depth, then establish first expansion pipe and second expansion pipe cover in proper order and strike on the screw rod, it advances downthehole bored to hammer it, then twist the nut on the screw rod soon, continue to tighten the nut, make the screw rod move to the direction of nut, first expansion pipe and second expansion pipe expand, barb circle on the first expansion pipe and the barb circle of second expansion pipe expand to open, accomplish the fastening, this expansion bolt expands many, and contact area is big between with the building, make connection fastening more stable.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

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

in the figure: 10. the device comprises a screw rod, 11, a thread part, 12, a polished rod part, 13, a plug, 20, a first expansion pipe, 21, a barb ring, 22, a friction barb, 23, an expansion groove, 24, a notch, 30, a nut, 40, a second expansion pipe, 50, a middle explosion ring, 60 and a gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts relate to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 2, the present embodiment provides a high-strength expansion screw, which includes

One end of the screw rod 10 is a threaded part 11, the other end of the screw rod is a polished rod part 12, and the polished rod part 12 is connected with a plug 13;

the first expansion pipe 20 is sleeved on the light rod part 12, and one end of the first expansion pipe is in contact with the plug 13;

a nut 30 provided on the threaded portion 11;

and also comprises

The second expansion pipe 40 is sleeved on the polished rod part 12 and the threaded part 11, and the second expansion pipe 40 is positioned between the first expansion pipe 20 and the screw cap 30;

the first expansion pipe 20 and the second expansion pipe 40 are both provided with a barb ring 21, and the barb ring 21 is positioned at one end close to the screw cap 30.

In this embodiment, in order to solve the problem that rotation may occur between an expansion bolt and a building due to long-time use, a high-strength expansion screw is designed, a single expansion pipe is divided into a first expansion pipe 20 and a second expansion pipe 40, the first expansion pipe 20 is an expansion pipe with a fixed length, the second expansion pipe 40 has a plurality of lengths, when fastening parts with different thicknesses is performed, the corresponding second expansion pipe 40 is replaced, the screw 10 can be sleeved with the first expansion pipe 20 and then inserted into a drilled hole in the building, then the corresponding second expansion pipe 40 is inserted, the screw 10 does not need to be repeatedly disassembled and assembled, if the drilling depth is determined to be enough, the first expansion pipe 20 and the second expansion pipe 40 are sequentially sleeved on the screw 10 to be knocked, the first expansion pipe 20 and the second expansion pipe 40 are hammered into the drilled hole, then the nut 30 is screwed on the screw 10, the nut 30 is continuously screwed, the screw 10 moves towards the nut 30, the first expansion pipe 20 and the second expansion pipe 40 are opened, the expansion ring 21 and the second expansion ring 40 on the first expansion pipe 20 and the second expansion pipe 20 are connected with the expansion ring 40, and the expansion pipe 21 can be more stably connected with the expansion pipe, and the expansion pipe can be more stably opened.

As shown in fig. 1 to 2, the plug 13 has a tapered structure, friction barbs 22 are disposed on the first expansion tube 20 and the second expansion tube 40, and the friction barbs 22 have a polygonal structure.

In this embodiment, in order to guarantee that expansion screw and the part of treating the fastening have great frictional force between, make expansion bolt expand, with between the building in close contact with, accomplish fixedly, friction thorn 22 makes expansion bolt and the increase of the frictional force between the part of treating the fastening, the relative fixity between expansion bolt and the part of treating the fastening has been guaranteed, expansion bolt has been avoided taking place to rotate, friction thorn 22 is triangle thorn and the mixed constitution of square thorn, intercrossing, it rotates to fill in to be difficult to in the wall body, ordinary inflation, the expansion pipe fills in and all can the disjunctor rotation after long-time use in the wall body, automatic locking is died after this kind of expansion pipe inflation of taking friction thorn, firm in connection.

As shown in fig. 1-2, further comprises

And the middle explosion ring 50 is sleeved on the screw rod 10 and is positioned between the first expansion pipe 20 and the second expansion pipe 40, and the diameter of the outer surface of the middle explosion ring 50 is gradually reduced from the middle to two ends.

In this embodiment, in order to make the first expansion pipe 20 and the second expansion pipe 40 expand more fully, the middle explosion ring 50 is disposed between the first expansion pipe 20 and the second expansion pipe 40, the outer diameter of the middle position of the middle explosion ring 50 is the largest, the outer diameters of the two end positions are gradually reduced, so that the surfaces close to the first expansion pipe 20 and the second expansion pipe 40 are both conical surfaces, when the bolt is fastened, the conical plug 13 compresses to expand the first expansion pipe 20, the middle explosion ring 50 expands the second expansion pipe 40, and the expansion contact area between the expansion bolt and the building is increased and the connection is firmer.

As shown in fig. 1 to 2, the first expansion pipe 20 and the second expansion pipe 40 are both provided with expansion grooves 23, the length direction of the expansion grooves 23 is the same as the length direction of the screw 10, and a plurality of expansion grooves 23 are provided, and the plurality of expansion grooves 23 are circumferentially arrayed along the first expansion pipe 20 or the second expansion pipe 40.

In the present embodiment, the first and second electrodes are,

as shown in fig. 1-2, barb circle 21 is the toper structure, barb circle 21 the conical surface with end cap 13's conical surface sets up relatively, just barb circle 21 comprises a plurality of triangle-shaped's barb.

In this embodiment, can not pulled out by the brute force after guaranteeing the expansion pipe installation, set up the barb of barb circle 21 into the triangle thorn, the triangle thorn is used for the hollow brick, the foam brick building, building room ladder shape brick, and the triangle thorn of conical surface can only not advance for after first expansion pipe 20 and the installation inflation of second expansion pipe 40, the triangle thorn forms the barb in advancing the building, avoids first expansion pipe 20 and second expansion pipe 40 to be pulled out.

As shown in fig. 1 to 2, a gasket 60 is further disposed between the second expansion pipe 40 and the nut 30, the first expansion pipe 20 and the second expansion pipe 40 are both provided with a notch 24, and the notch 24 is communicated with the expansion groove 23.

In this embodiment, in order to ensure the overall connection function, a gasket 60 is disposed between the nut 30 and the second expansion pipe 40, so that the nut 30 transmits force to the component to be fastened and the building through the gasket 60, the gap 24 is communicated with the expansion groove 23, so that when the nut 30 is screwed, the tapered plug 13 expands the first expansion pipe 20 more easily, and the middle explosion ring 50 expands the second expansion pipe 40 more easily, so that the connection between the expansion bolt and the building is firmer and more stable.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the present invention.

Claims

1. A high-strength expansion screw comprises

One end of the screw rod (10) is a threaded part (11), the other end of the screw rod is a polished rod part (12), and the polished rod part (12) is connected with a plug (13);

the first expansion pipe (20) is sleeved on the light rod part (12), and one end of the first expansion pipe is in contact with the plug (13);

a nut (30) provided on the threaded portion (11);

it is characterized by also comprising

The second expansion pipe (40) is sleeved on the polished rod part (12) and the threaded part (11), and the second expansion pipe (40) is positioned between the first expansion pipe (20) and the screw cap (30);

the first expansion pipe (20) and the second expansion pipe (40) are provided with barb rings (21), and the barb rings (21) are positioned at one end close to the screw cap (30).

2. The high-strength expansion screw as claimed in claim 1, wherein the plug (13) is of a conical structure, the first expansion tube (20) and the second expansion tube (40) are provided with friction spines (22), and the friction spines (22) are of a polygonal structure.

3. The high-strength expansion screw according to claim 2, further comprising

And the middle explosion ring (50) is sleeved on the screw (10) and is positioned between the first expansion pipe (20) and the second expansion pipe (40), and the diameter of the outer surface of the middle explosion ring (50) is gradually reduced from the middle to two ends.

4. A high-strength expansion screw according to claim 3, wherein the first expansion pipe (20) and the second expansion pipe (40) are provided with expansion grooves (23), the length direction of the expansion grooves (23) is the same as the length direction of the screw (10), and the expansion grooves (23) are provided in a plurality of numbers, and the expansion grooves (23) are circumferentially arrayed along the first expansion pipe (20) or the second expansion pipe (40).

5. A high-strength expansion screw according to claim 3, wherein the barb ring (21) is a conical structure, the conical surface of the barb ring (21) is opposite to the conical surface of the plug (13), and the barb ring (21) is composed of a plurality of triangular barbs.

6. The high-strength expansion screw according to claim 4, wherein a gasket (60) is further arranged between the second expansion pipe (40) and the nut (30), the first expansion pipe (20) and the second expansion pipe (40) are both provided with notches (24), and the notches (24) are communicated with the expansion groove (23).