CN218266680U

CN218266680U - Expansion bolt

Info

Publication number: CN218266680U
Application number: CN202222914706.1U
Authority: CN
Inventors: 徐国威; 仝向东
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-01-10
Anticipated expiration: 2032-11-03

Abstract

The utility model provides an expansion bolt, including bolt, nut and fastening pipe, the bolt have expanded head and with nut threaded connection's screw thread portion, fastening pipe includes body and split, fastening pipe suit is on the bolt, fastening pipe's split is located the one end of bolt's head, fastening pipe's split has the bodiness structure that increases local thickness on the split, the thickness of bodiness structure after with split stack is twice at least in the wall thickness of fastening pipe. The utility model discloses can make bolt head diameter show the increase, can increase the tensioning dynamics, also have better tensioning dynamics to the mounting hole of the wall pine, have better economic nature and fixed strength.

Description

Expansion bolt

Technical Field

The utility model relates to a technical field of fastener specifically says and relates to an expansion bolts.

Background

Traditional expansion bolts adopts the built-in bolt structure of circle iron pipe, and the bolt has expanded head and coupling nut's screw thread portion, and the circle iron pipe is in the one end split of bolt head, screws up the nut during the fastening, and the bolt head struts pipe head end split, and the circle iron pipe head struts, the diameter increase props up the mounting hole, realizes the fastening.

Present expansion bolts have some problems, at first, on the present market, in order to save material, adopt the pipe wall thinner circle iron pipe, lead to the head lamella to strut back circle iron pipe head inflation limited, the diameter of increase is less, can't prop tight mounting hole, just also lead to expansion bolts fastening insecure, can't prop tight mounting hole to lead to expansion bolts easily deviate from under the exogenic action, easily cause danger and material loss.

Secondly, the expansion range of the head of the expansion bolt produced according to the standard feeding is also obviously limited, namely, the diameter of the wall thickness of a round iron pipe is increased, and the situation of insufficient fastening degree can occur when the expansion bolt faces a part of the installation surface. For example, the existing part of light wall features pursue light weight, sound insulation, easy transportation, easy installation and the like, the limit of wall materials can cause the lower strength of the wall itself, the side wall strength of the installation Kong Huiyou hole drilled on the wall is not enough, the part of the wall which needs to fix objects is not enough in structural strength, or the part of the wall which needs to fix objects is positioned at the wall material with softer texture or slightly loose texture when the hole is drilled, so that the traditional expansion bolt is not enough to generate enough tensioning force after being expanded, and the fixing strength is not enough. Generally, under the condition, constructors can squeeze small wedges into the fixing holes, so that materials in the holes are increased, and the tensioning force of the expansion bolts is increased.

Above-mentioned two kinds of modes have all seriously influenced the reliability of installation, lead to fixed strength to descend, have fastening strength low, use the back not hard up, easily cause the problem of safety risk. Therefore, the utility model provides an expansion bolt.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the weak point of above-mentioned conventional art, provide an expansion bolt, it has the fixed strength height, need not additionally supply the characteristics of reinforced material when using.

The purpose of the utility model is achieved through the following technical measures:

the utility model provides an expansion bolt, includes bolt, nut and fastening pipe, the bolt have expanded head and with nut threaded connection's screw portion, the fastening pipe includes body and split, the fastening pipe suit is on the bolt, the split of fastening pipe is located the one end of the head of bolt, its characterized in that: the split of the fastening tube is provided with a thickening structure for increasing the local thickness, and the thickness of the thickening structure after the split is superposed is at least twice the tube wall thickness of the fastening tube.

Preferably, the thickening structure is formed by bending one end of the split exceeding the bolt head to the split part.

Preferably, the thickening structure is formed by bending one end of the split pipe body away from at least one time.

Preferably, the thickening structure is located the split lateral wall of fastening pipe, the split of fastening pipe is buckled to the screw thread portion of bolt, the maximum diameter that the thickening structure lateral wall constitutes is less than the head diameter of bolt.

Preferably, the thickening structure is located between the split inner side wall of the fastening pipe and the thread part of the bolt, and the split outer side wall of the fastening pipe is the same as the diameter of the fastening pipe body.

Preferably, the thickening structure is at least one semi-annular flap, the semi-annular flap is fixedly connected with the split of the fastening pipe, and the semi-annular flap is positioned on the split side wall of the fastening pipe.

Owing to adopted above-mentioned technical scheme, compared with prior art, the utility model has the advantages that:

the utility model discloses a novel expansion bolts strengthens in bolt head split department, and thickness increases, and all the other parts of pipe iron remain unchanged, in case expansion bolts struts, and its head diameter that can rise at last is showing and increases, just can increase the tensioning dynamics, also has better tensioning dynamics to the mounting hole of wall pine, has better economic nature and fixed strength.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

fig. 2 is a schematic cross-sectional structure of the thickening structure and the segments of embodiment 1 of the present invention;

fig. 3 is a schematic cross-sectional structure of the thickening structure and the segments of embodiment 2 of the present invention;

fig. 4 is a schematic cross-sectional structure of the thickening structure and the segments of embodiment 3 of the present invention;

fig. 5 is a schematic cross-sectional structure of the thickening structure and the segments of embodiment 4 of the present invention;

fig. 6 is a schematic cross-sectional view of a thickening structure and a segment according to example 5 of the present invention.

The labels in the figure are: 1. a bolt; 11. a head portion; 12. a threaded portion; 2. a nut; 3. fastening the tube; 31. a pipe body; 32. splitting; 4. thickening the structure; 5. a semi-annular flap.

Detailed Description

The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and the detailed description, so as to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

as shown in fig. 1 and 2, an expansion bolt 1 includes a bolt 1, a nut 2 and a fastening tube 3, the bolt 1 has an expanded head 11 and a threaded portion 12 screwed with the nut 2, the fastening tube 3 includes a tube body 31 and a split 32, the fastening tube 3 is sleeved on the bolt 1, the split 32 of the fastening tube 3 is located at one end of the head 11 of the bolt 1, and is characterized in that: the partial sections 32 of the fastening tube 3 have a thickening 4 which increases the local thickness, the thickness of the thickening 4 in combination with the partial sections 32 being at least twice the thickness of the tube wall of the fastening tube 3.

The thickened structure 4 is formed by bending the end of the split 32 beyond the head 11 of the bolt 1 towards the split 32.

When expansion bolts 1 need to be used, bolt 1 sleeved with fastening pipe 3 is inserted into a mounting hole drilled in advance, head 11 of bolt 1 is inserted into the mounting hole inwards, part of threaded portion 12 is exposed out of the mounting hole, nut 2 connected to threaded portion 12 through wrench clamping threads is reused, a wrench is rotated to drive nut 2 to move towards head 11 of bolt 1 along threaded portion 12, then extrusion pipe body 31 drives pipe body 31 to extrude split 32, split 32 extrudes towards head 11 of bolt 1 and moves, thickened structure 4 bent towards split 32 beyond one end of head 11 of bolt 1 is also extruded towards head 11 of bolt 1, bolt 1 head 11 is sleeved with a thickness equivalent to twice wall of fastening pipe 3, diameter of head 11 of bolt 1 is obviously increased, tensioning force is increased, mounting hole loose to the wall is also provided with better tensioning force, no additional structure needs to be added, and better economy is achieved.

Example 2:

other technical features are the same as those of embodiment 1 except for the following technical features.

As shown in fig. 3, the thickened structure 4 is formed by bending the end of the split 32 away from the tube 31 at least once. The split 32 is bent inwards once to be twice as thick, and bent twice to be three times as thick, and although the higher thickness can increase the tensioning degree of the head 11 of the bolt 1, the gap between the fastening pipe 3 and the mounting hole is too large, and the expansion bolt 1 cannot play a role in stable support at this time.

After the split 32 is bent twice, the thickness of the thickened structure is equivalent to three times of the thickness of the pipe wall of the fastening pipe 3, at the moment, the expansion bolt 1 is inserted into the mounting hole, and then the nut 2 is screwed, so that the diameter of the head 11 of the bolt 1 is increased more remarkably, the tensioning force is further increased, and the expansion bolt 1 has higher fixing strength.

Example 3:

As shown in fig. 4, the thickened structure 4 is located on the outer side wall of the split 32 of the fastening tube 3, the split 32 of the fastening tube 3 is bent toward the threaded portion 12 of the bolt 1, and the maximum diameter of the outer side wall of the thickened structure 4 is smaller than the diameter of the head 11 of the bolt 1.

When expansion bolts 1 need to be used, bolt 1 that the cover was equipped with fastening pipe 3 is earlier inserted in the mounting hole that has beaten in advance, bolt 1's head 11 inserts in the mounting hole inwards, and make partial screw thread portion 12 expose the mounting hole, reuse spanner chucking threaded connection is in nut 2 on screw thread portion 12, it drives nut 2 and removes to bolt 1's head 11 along screw thread portion 12 to rotate the spanner, and then it drives body 31 and extrudees split 32 to extrude the body 31, split 32 extrudes to bolt 1's head 11 and removes, it extrudees to remove to bolt 1 head 11 together to drive bodiness structure 4, bolt 1 head 11 is located to the thickness cover that is equivalent to two split 32 and bodiness structure 4 this moment, make bolt 1 head 11's diameter show the increase, thereby increase the tensioning dynamics, also have better tensioning dynamics to the mounting hole that the wall is pine.

The maximum diameter formed by the outer side wall of the thickened structure 4 is smaller than the diameter of the head 11 of the bolt 1, so that the head 11 of the bolt 1 can be prevented from slipping out after the thickened structure 4 is extruded.

Example 4:

As shown in fig. 5, the thickened structure 4 is located between the inner side wall of the split 32 of the fastening tube 3 and the threaded portion 12 of the bolt 1, and the outer side wall of the split 32 of the fastening tube 3 has the same diameter as the tubular body 31 of the fastening tube 3.

When needing to use expansion bolts 1, insert the mounting hole that has made in advance in the bolt 1 that the cover was equipped with fastening pipe 3 earlier, insert in the mounting hole towards the inside head 11 of bolt 1, and make partial screw thread portion 12 expose the mounting hole, reuse spanner chucking threaded connection is in nut 2 on screw thread portion 12, it drives nut 2 and removes to bolt 1's head 11 along screw thread portion 12 to rotate the spanner, and then it drives body 31 and extrudes split 32 to extrude body 31, split 32 extrudes to bolt 1's head 11 and removes, it extrudees to bolt 1 head 11 together to drive bodiness structure 4, need not to buckle split 32 and directly adopt the bodiness structure 4 that thickness is suitable, thereby make the diameter of bolt 1 head 11 show the increase, thereby increase the tensioning dynamics, also have better tensioning dynamics to the pine mounting hole of wall.

Example 5:

As shown in fig. 6, the thickened structure 4 is at least one semi-annular flap 5, the semi-annular flap 5 is fixedly connected with the split 32 of the fastening tube 3, and the semi-annular flap 5 is positioned on the side wall of the split 32 of the fastening tube 3. The semi-ring-shaped petals 5 can be fixed on the fastening pipe 3 petals 32 in a spot welding or laser welding mode, and the semi-ring-shaped petals 5 can be connected on the inner side wall or the outer side wall of the fastening pipe 3 petals 32.

The number of the semi-annular flaps 5 is determined according to the number of the flaps 32, at least three quarters of the flaps 32 can be wrapped by the semi-annular flaps 5, when the nut 2 is screwed down and the bolt 1 is used, the thickness of the semi-annular flaps 5 which are not wrapped by the flaps 32 and are lacked can be ignored, and the connected semi-annular flaps 5 can completely play a role in obviously increasing the diameter of the head 11 of the bolt 1, so that the tensioning force is increased, and the tensioning force is better for mounting holes with loose walls.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An expansion bolt, includes bolt (1), nut (2) and fastening pipe (3), bolt (1) has expanded head (11) and the screw portion (12) with nut (2) threaded connection, fastening pipe (3) includes body (31) and split (32), fastening pipe (3) suit is on bolt (1), split (32) of fastening pipe (3) are located the one end of head (11) of bolt (1), its characterized in that: the fastening tube (3) is provided with a thickening structure (4) for increasing the local thickness on the split (32), and the thickness of the thickening structure (4) after the split (32) is superposed is at least twice of the tube wall thickness of the fastening tube (3).

2. An expansion bolt according to claim 1, wherein: the thickening structure (4) is formed by bending one end of the split (32) beyond the head (11) of the bolt (1) to the split (32).

3. An expansion bolt according to claim 1, wherein: the thickening structure (4) is formed by bending one end of the split (32) far away from the pipe body (31) at least once.

4. An expansion bolt according to claim 1, wherein: thickening structure (4) are located split (32) lateral wall of fastening pipe (3), split (32) of fastening pipe (3) are buckled to screw thread portion (12) of bolt (1), the maximum diameter that thickening structure (4) lateral wall constitutes is less than head (11) diameter of bolt (1).

5. An expansion bolt according to claim 1, wherein: thickening structure (4) are located between split (32) inside wall of fastening pipe (3) and screw thread portion (12) of bolt (1), fastening pipe (3) split (32) outside wall is the same with fastening pipe (3) body (31) diameter.

6. An expansion bolt according to claim 1, characterized in that: thickening structure (4) are at least a slice semiannular lamella, fixed connection between semiannular lamella and split (32) of fastening pipe (3), semiannular lamella is located split (32) lateral wall of fastening pipe (3).