Detachable metal expansion bolt

Abstract

The utility model discloses a detachable metal expansion bolt which comprises a cone structure, a hollow cylinder and an expansion structure, the cone structure is sequentially connected with the hollow cylinder and the expansion structure, the cone structure comprises a stud and a nut, the hollow cylinder comprises a lock nut and a first thread sleeve, the expansion structure comprises a second thread sleeve, and the lock nut is connected with the second thread sleeve. Wherein a first threaded groove and a second threaded groove are formed in the first threaded sleeve and the second threaded sleeve respectively, the first threaded sleeve and the second threaded sleeve are detachably connected with the stud respectively, and the first threaded sleeve and the second threaded sleeve are further provided with a first expansion part and a second expansion part respectively. The structure is detachable and is used after being installed on the studs in a one-to-one correspondence mode when needing to be used, the structure is more convenient to disassemble and assemble, meanwhile, unified classified storage can be facilitated, and reliability is higher. When the second threaded sleeve is extruded in the direction of the first threaded sleeve, the first expansion part on the first threaded sleeve protrudes outwards, and the outer protruding block makes contact with the interior of the wall after being expanded, so that the double-fixing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a detachable metal expansion bolt. Background Art

[0002] In daily construction, expansion bolts are widely used as a kind of installation and connection components. They can be installed conveniently and quickly. They are firm, reliable, economical and popular. They have a wide range of applications and a huge amount of usage. They are mostly used in the decoration link after the completion of the building. It is necessary to drill a hole in the wall. After insertion, the tail end of the sleeve is expanded and fixed on the inner wall of the wall hole. The original red brick structure wall is dense and easy to fix. With the promotion of environmentally friendly buildings, red bricks have gradually stepped out of the historical stage and have been replaced by hollow bricks. The hollow brick body is light and the solid part is mostly honeycomb-shaped, which is loose and fragile. This brings trouble to the use of expansion bolts. The loose honeycomb structure of the inner wall of the hole invisibly offsets part of the expansion of the expansion bolt, and it cannot be firmly connected. At the same time, traditional expansion bolts are not removable and inconvenient to disassemble and assemble. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art solutions, the utility model provides a detachable metal expansion bolt, which can effectively solve the problems raised by the background technology.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A detachable metal expansion bolt comprises a cone structure, a hollow cylinder and an expansion structure, wherein the cone structure is connected to the hollow cylinder and the expansion structure in sequence, the cone structure comprises a stud and a nut, the hollow cylinder comprises a lock nut and a first screw sleeve, the expansion structure comprises a second screw sleeve, wherein the first screw sleeve and the second screw sleeve are respectively provided with a first thread groove and a second thread groove, the first screw sleeve and the second screw sleeve are respectively detachably connected to the stud, and the first screw sleeve and the second screw sleeve are also respectively provided with a first expansion portion and a second expansion portion;

[0006] Both ends of the first screw sleeve are open structures, one end of the second screw sleeve is a closed structure, and one end of the second screw sleeve is formed with an edge protruding outward, wherein the first screw sleeve is provided with a positioning portion, the positioning portion is connected to the second expansion portion, the first expansion portion is arranged around the circumference of the first screw sleeve, the first expansion portion includes a plurality of external protrusions, an internal protrusion and a flexible metal connecting sheet, the second expansion portion is arranged around the second screw sleeve, and the second expansion portion is composed of a plurality of expansion blocks.

[0007] As a further description of the above technical solution, the stud and the nut are integrally formed, and a gasket is provided between the stud and the nut, wherein the end of the stud away from the nut is connected to the first thread groove, and the stud passes through the first thread groove and the second thread groove in sequence and is connected to the first screw sleeve and the second screw sleeve, the first screw sleeve and the lock nut are integrally formed, and the nut is hexagonal in shape.

[0008] As a further description of the above technical solution, the diameter of the first screw sleeve is not less than the diameter of the second screw sleeve, one end of the second screw sleeve is embedded in the first screw sleeve, and the second screw sleeve moves along the axial direction of the stud through the first thread groove and the second thread groove, wherein the locking cap is also provided with a plurality of locking holes.

[0009] As a further description of the above technical solution, the positioning portion includes a plurality of positioning holes, wherein the expansion blocks are installed in the positioning holes one by one, and the shape of the expansion blocks is conical.

[0010] As a further description of the above technical solution, the outer convex block is connected to the inner convex block through a metal connecting sheet, the outer convex block is in the shape of a disc, and the inner convex block is in the shape of a cylinder.

[0011] As a further description of the above technical solution, the metal connecting piece is made of stainless steel.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The detachable metal expansion bolt of the utility model has at least one of the following beneficial effects during use:

[0014] When the expansion bolt is driven into the through hole, the second screw sleeve is pressed against the wall and deformed under the extrusion force, so that its structure expands. At the same time, under the action of the second screw sleeve, the second screw sleeve squeezes the first screw sleeve, so that the second expansion part of the second screw sleeve and the first expansion part of the first screw sleeve can press against the side wall of the through hole, thereby achieving a fixing effect. The first screw sleeve and the second screw sleeve are connected to the stud through the first thread groove and the second thread groove. The structure is detachable and can be installed one by one behind the stud when needed. The structure is more convenient to disassemble and assemble, and it is also conducive to unified classification and storage, and has higher reliability. The first expansion part is composed of an outer convex block and an inner convex block, and a metal connecting piece is arranged between the outer convex block and the inner convex block. The function of the metal connecting piece is that when the second screw sleeve reaches the expansion limit, the second expansion part on the second screw sleeve adopts four expansion blocks, and the expansion blocks are connected with the positioning part on the first screw sleeve after protruding, wherein the positioning part is four positioning holes with the same shape as the expansion blocks. When the expansion blocks are embedded in the positioning holes, they are pushed by the extrusion force, and the expansion blocks are against the positioning holes and contact with the side walls of the through hole. When the second screw sleeve is squeezed along the direction of the first screw sleeve, the first expansion part on the first screw sleeve protrudes outward, and the outer convex blocks are in contact with the inside of the wall after expanding, thereby realizing the effect of double fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a first installation structure of a detachable metal expansion bolt of the utility model;

[0016] Figure 2 This is a schematic diagram of a second installation structure of a detachable metal expansion bolt of the utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of a first thread sleeve of a detachable metal expansion bolt of the utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of a second thread sleeve of a detachable metal expansion bolt of the utility model;

[0019] Figure 5 This is a perspective structural diagram of a first thread sleeve of a detachable metal expansion bolt of the utility model;

[0020] Figure 6 The utility model is a schematic perspective structure diagram of a second thread sleeve of a detachable metal expansion bolt.

[0021] Numbers in the figure:

[0022] 1. Conical structure; 101. Nut; 102. Washer; 103. Stud; 2. Hollow cylinder; 201. Locking cap; 202. First expansion part; 203. Positioning part; 204. First screw sleeve; 205. First thread groove; 206. External protrusion; 207. Internal protrusion; 208. Metal connecting piece; 3. Expansion structure; 301. Second screw sleeve; 302. Second expansion part; 303. Second thread groove; 304. Expansion block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-6 As shown, the utility model provides a detachable metal expansion bolt, including a cone structure 1, a hollow cylinder 2 and an expansion structure 3, the cone structure 1 is connected to the hollow cylinder 2 and the expansion structure 3 in sequence, the cone structure 1 includes a stud 103 and a nut 101, the hollow cylinder 2 includes a locking cap 201 and a first screw sleeve 204, the expansion structure 3 includes a second screw sleeve 301, wherein the first screw sleeve 204 and the second screw sleeve 301 are respectively provided with a first thread groove 205 and a second thread groove 303, the first screw sleeve 204 and the second screw sleeve 301 are respectively detachably connected to the stud 103, and the first screw sleeve 204 and the second screw sleeve 301 are also respectively provided with a first expansion portion 202 and a second expansion portion 302.

[0025] During use of this embodiment, a through hole with a diameter larger than the second screw sleeve 301 and a depth smaller than the overall length of the expansion bolt is drilled into the wall. After the expansion bolt is driven into the through hole, the second screw sleeve 301 is pressed against the wall and deformed under the action of the squeezing force, thereby expanding its structure. At the same time, under the action of the second screw sleeve 301, the second screw sleeve 301 squeezes the first screw sleeve 204, so that the second expansion part 302 of the second screw sleeve 301 and the first expansion part 202 of the first screw sleeve 204 can press against the side wall of the through hole, thereby achieving a fixing effect.

[0026] Among them, the first thread sleeve 204 and the second thread sleeve 301 are connected to the stud 103 through the first thread groove 205 and the second thread groove 303. The structure is detachable and can be installed one by one on the stud 103 when needed. The structure is more convenient to disassemble and assemble, and is also conducive to unified classification and storage, with higher reliability.

[0027] Both ends of the first screw sleeve 204 are open structures, one end of the second screw sleeve 301 is a closed structure, and one end of the second screw sleeve 301 is formed with an edge protruding outward, wherein the first screw sleeve 204 is provided with a positioning portion 203, and the positioning portion 203 is connected to the second expansion portion 302, and the first expansion portion 202 is arranged around the circumference of the first screw sleeve 204, and the first expansion portion 202 includes a plurality of external protrusions 206, an internal protrusion 207 and a flexible metal connecting sheet 208, and the second expansion portion 302 is arranged around the second screw sleeve 301, and the second expansion portion 302 is composed of a plurality of expansion blocks 304.

[0028] The first expansion portion 202 and the second expansion portion 302 in this embodiment are composed of a plurality of raised modules, wherein the first expansion portion 202 is composed of an outer convex block 206 and an inner convex block 207, and a metal connecting piece 208 is arranged between the outer convex block 206 and the inner convex block 207. The function of the metal connecting piece 208 is that when the second screw sleeve 301 reaches the expansion limit, the second expansion portion 302 on the second screw sleeve 301 adopts four expansion blocks 304, and the expansion blocks 304 are connected with the positioning portions 203 on the first screw sleeve 204 after protruding, wherein the positioning portions 203 are four positioning holes with the same shape as the expansion blocks 304. When the expansion blocks 304 are embedded in the positioning holes, they are pushed by the extrusion force, and the expansion blocks 304 are against the positioning holes and contact with the side walls of the through holes. When the second screw sleeve 301 is squeezed along the direction of the first screw sleeve 204, the first expansion portion 202 on the first screw sleeve 204 protrudes outward, and the outer convex blocks 206 are in contact with the inside of the wall after expanding, thereby achieving the effect of double fixing.

[0029] It is further explained that the stud 103 and the nut 101 are integrally formed, and a gasket 102 is provided between the stud 103 and the nut 101, wherein the end of the stud 103 away from the nut 101 is connected to the first thread groove 205, and the stud 103 passes through the first thread groove 205 and the second thread groove 303 in sequence and is connected to the first screw sleeve 204 and the second screw sleeve 301, the first screw sleeve 204 and the locking cap 201 are integrally formed, and the nut 101 is hexagonal in shape.

[0030] It is further explained that the diameter of the first screw sleeve 204 is not less than the diameter of the second screw sleeve 301, one end of the second screw sleeve 301 is embedded in the first screw sleeve 204, and the second screw sleeve 301 moves along the axial direction of the stud 103 through the first thread groove 205 and the second thread groove 303, and the lock cap 201 is also provided with a plurality of lock holes.

[0031] It is further explained that the positioning portion 203 includes a plurality of positioning holes, wherein the expansion blocks 304 are installed in the positioning holes one by one, and the shape of the expansion blocks 304 is conical.

[0032] It is further explained that the outer protrusion 206 is connected to the inner protrusion 207 via a metal connecting piece 208 , the outer protrusion 206 is in the shape of a disc, and the inner protrusion 207 is in the shape of a cylinder.

[0033] It is further explained that the metal connecting piece 208 is made of stainless steel.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A detachable metal expansion bolt, characterized in that: The invention comprises a cone structure, a hollow cylinder and an expansion structure, wherein the cone structure is connected to the hollow cylinder and the expansion structure in sequence, the cone structure comprises a stud and a nut, the hollow cylinder comprises a lock nut and a first screw sleeve, the expansion structure comprises a second screw sleeve, wherein the first screw sleeve and the second screw sleeve are respectively provided with a first thread groove and a second thread groove, the first screw sleeve and the second screw sleeve are respectively detachably connected to the stud, and the first screw sleeve and the second screw sleeve are also respectively provided with a first expansion portion and a second expansion portion; Both ends of the first screw sleeve are open structures, one end of the second screw sleeve is a closed structure, and one end of the second screw sleeve is formed with an edge protruding outward, wherein the first screw sleeve is provided with a positioning portion, the positioning portion is connected to the second expansion portion, the first expansion portion is arranged around the circumference of the first screw sleeve, the first expansion portion includes a plurality of external protrusions, an internal protrusion and a flexible metal connecting sheet, the second expansion portion is arranged around the second screw sleeve, and the second expansion portion is composed of a plurality of expansion blocks.

2. A detachable metal expansion bolt according to claim 1, characterized in that: The stud and the nut are integrally formed, and a gasket is provided between the stud and the nut, wherein one end of the stud away from the nut is connected to the first thread groove, and the stud passes through the first thread groove and the second thread groove in sequence and is connected to the first screw sleeve and the second screw sleeve, the first screw sleeve and the lock nut are integrally formed, and the nut is hexagonal in shape.

3. A detachable metal expansion bolt according to claim 1 or 2, characterized in that: The diameter of the first screw sleeve is not less than that of the second screw sleeve. One end of the second screw sleeve is embedded in the first screw sleeve. The second screw sleeve moves along the axial direction of the stud through the first thread groove and the second thread groove. The locking cap is also provided with a plurality of locking holes.

4. The detachable metal expansion bolt according to claim 1, characterized in that: The positioning portion comprises a plurality of positioning holes, wherein the expansion blocks are installed in the positioning holes in a one-to-one correspondence, and the shape of the expansion blocks is conical.

5. The detachable metal expansion bolt according to claim 1, characterized in that: The outer convex block is connected to the inner convex block through a metal connecting sheet. The outer convex block is in the shape of a disc, and the inner convex block is in the shape of a cylinder.

6. A detachable metal expansion bolt according to claim 1 or 5, characterized in that: The metal connecting piece is made of stainless steel.

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