CN219774547U - Explosion-penetrating expansion bolt - Google Patents
Explosion-penetrating expansion bolt Download PDFInfo
- Publication number
- CN219774547U CN219774547U CN202320832273.7U CN202320832273U CN219774547U CN 219774547 U CN219774547 U CN 219774547U CN 202320832273 U CN202320832273 U CN 202320832273U CN 219774547 U CN219774547 U CN 219774547U
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- CN
- China
- Prior art keywords
- elastic
- expansion
- screw
- mounting hole
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002360 explosive Substances 0.000 claims 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Dowels (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses a penetrating expansion bolt, which comprises a screw and an elastic expansion sleeve, wherein the screw sequentially comprises an integrated structure consisting of a polish rod, a conical part, a reducing rod and a threaded part, the elastic expansion sleeve comprises an integrated structure consisting of a circular pipe and an elastic pipe, an enlarged part is arranged on the outer wall of the elastic pipe, expansion joints are uniformly distributed on the side wall of the elastic pipe, and continuous and penetrating internal threads are arranged in the circular pipe and the elastic pipe. Because the diameter of mounting hole is less than the external diameter of increase guide part, after the mounting hole was arranged in to the elastic expansion cover, the effect that the increase guide part on the elastic expansion cover received the mounting hole inner wall inwards extrudeed, makes the hole of elastic expansion cover become interior taper hole by the round hole, when the elastic expansion cover in the mounting hole was arranged in with the screw-in, the screw then contacted with interior taper hole and produced powerful expansion force to effectively prevent that whole expansion bolt from deviating from in the mounting hole, reliability and the security when guaranteeing the use.
Description
Technical Field
The utility model relates to a through explosion type expansion bolt, and belongs to the technical field of expansion bolts.
Background
With the continued development of the fastener industry, expansion screws come in a wide variety of forms. However, the existing expansion bolts still have the defects that: or ensuring the reliability of fixation without considering the structural complexity and the manufacturing cost; or fix reliability and manufacturing cost are solved, but installation convenience is lost. In addition, the outer diameter of the elastic expansion sleeve of the existing expansion bolt is smaller than that of the mounting hole, when the screw is screwed into the elastic expansion sleeve, the elastic expansion sleeve can rotate in the mounting hole to slip, so that the screw cannot be screwed fast, and the mounting efficiency is reduced.
Therefore, it is necessary to design an expansion bolt which has a simple structure, reliable fixation, low manufacturing cost and convenient installation.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the explosion-penetrating expansion bolt which is simple in structure, low in manufacturing cost, convenient to install and firm in fixation.
The utility model is composed as follows: the utility model provides a wear to explode formula expansion bolts, includes screw and elastic expansion cover, the screw is by polished rod, circular cone portion, reducing pole and the integral type structure that screw thread portion constitutes in proper order, elastic expansion cover comprises pipe and elastic tube's integral type structure, is provided with the increase portion on the outer wall of elastic tube, the equipartition has the expansion joint on elastic tube's lateral wall, is provided with continuous and the internal thread that runs through in pipe and elastic tube, screw thread portion and internal thread cooperation.
Further, the minimum outer diameter of the conical portion is equal to the outer diameter of the diameter-reduced rod, and the outer diameter of the diameter-reduced rod is smaller than the outer diameter of the threaded portion.
Further, the sum of the lengths of the diameter reducing rod and the threaded portion is greater than the length of the round tube or the elastic tube.
Further, the enlarged portion is composed of a guide cone section and a cylindrical section, and the outer diameter of the cylindrical section is larger than that of the elastic expansion sleeve.
Due to the adoption of the technical scheme, the utility model has the advantages that:
1. the utility model has only two parts of the screw and the elastic expansion sleeve, and the two parts have simple structure, are easy to process, and reduce the manufacturing cost;
2. according to the utility model, the outer wall of the elastic expansion sleeve is provided with the increased guide part, after the expansion sleeve is placed in the mounting hole, the increased guide part and the inner wall of the mounting hole are pre-tensioned, friction force is generated, and when the screw is screwed into the elastic expansion sleeve, the elastic expansion sleeve cannot rotate and skid in the mounting hole under the action of the friction force, so that the screw can be conveniently and rapidly screwed, and the mounting efficiency is improved;
3. because the diameter of mounting hole is less than the external diameter of increase guide part, after the mounting hole was arranged in to the elastic expansion cover, the effect that the increase guide part on the elastic expansion cover received the mounting hole inner wall inwards extrudeed, makes the hole of elastic expansion cover become interior taper hole by the round hole, when the elastic expansion cover in the mounting hole was arranged in to screw in with the screw, the screw then contacted with interior taper hole and produced powerful expansion force, the more the screw was twisted in, the expansion force that produces is greater to effectively prevent that whole expansion bolt from deviate from in the mounting hole, reliability and security when guaranteeing to use.
Drawings
FIG. 1 is a schematic view of the structure of the present utility model in forward assembly;
FIG. 2 is a schematic view of the structure of the present utility model in reverse assembly;
fig. 3 is a schematic structural view of an elastic expansion shell.
Reference numerals illustrate: 1-screw, 101-polish rod, 102-conical part, 103-diameter-reducing rod, 104-screw part, 2-elastic expansion sleeve, 201-round tube, 202-elastic tube, 203-enlarged part, 204-expansion joint, 205-guide cone section and 206-cylindrical section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and examples.
Examples
As shown in fig. 1 and 2, the utility model comprises a screw 1 and an elastic expansion sleeve 2, wherein the screw 1 sequentially comprises a polished rod 101, a conical part 102, a reducing rod 103 and a threaded part 104, the elastic expansion sleeve 2 comprises a circular tube 201 and an elastic tube 202, an enlarged part 203 is arranged on the outer wall of the elastic tube 202, expansion joints 204 are uniformly distributed on the side wall of the elastic tube 202, continuous and penetrating internal threads are arranged in the circular tube 201 and the elastic tube 202, and the threaded part 104 is matched with the internal threads. The minimum outer diameter of the conical portion 102 is equal to the outer diameter of the diameter-reduced rod 103, and the outer diameter of the diameter-reduced rod 103 is smaller than the outer diameter of the threaded portion 104. The sum of the lengths of the diameter-reduced rod 103 and the threaded portion 104 is greater than the length of the circular tube 201 or the elastic tube 202.
Referring to fig. 3, the enlarged portion 203 is composed of a guide cone 205 and a cylindrical section 206, and the outer diameter of the cylindrical section 206 is larger than the outer diameter of the elastic expansion shell 2.
The working principle of the utility model is as follows:
when the elastic expansion sleeve 2 is assembled with the screw 1, the elastic expansion sleeve 2 can adopt two assembly modes of forward direction and reverse direction.
As shown in fig. 1, when the elastic expansion shell 2 is assembled in the forward direction, the threaded portion 104 of the screw 1 is first screwed into the circular tube 201 of the elastic expansion shell 2, but the threaded portion 104 is guaranteed not to enter the elastic tube 202, then a mounting hole is drilled at the position where the expansion bolt is mounted, the diameter of the mounting hole is made to be larger than the outer diameter of the elastic expansion shell 2 and smaller than the outer diameter of the cylindrical section 206 on the enlarged portion 203, and then the elastic expansion shell 2 and the screw 1 are put into the mounting hole together. When the elastic expansion sleeve 2 is placed in the mounting hole, the enlarged portion 203 is pre-tightened with the inner wall of the mounting hole and generates friction force, and when the screw 1 is continuously screwed into the elastic expansion sleeve 2, the elastic expansion sleeve 2 cannot rotate and skid in the mounting hole under the action of the friction force, so that the screw 1 can be conveniently and rapidly screwed, and the mounting efficiency is improved. Meanwhile, because the diameter of the mounting hole is smaller than the outer diameter of the enlarged part 203, when the elastic expansion sleeve 2 is placed in the mounting hole, the enlarged part 203 on the elastic expansion sleeve 2 is pressed inwards under the action of the inner wall of the mounting hole, so that the inner hole of the elastic tube 202 of the elastic expansion sleeve 2 is changed into an inner conical hole from a round hole, when the screw 1 is continuously screwed into the elastic expansion sleeve 2 placed in the mounting hole, the threaded part 104 of the screw 1 is contacted with the inner conical hole of the elastic tube 202 and generates strong expansion force, the screw 1 is screwed more, and the generated expansion force is larger, so that the whole expansion bolt is effectively prevented from falling out from the mounting hole, and the reliability and safety in use are ensured.
As shown in fig. 2, when the elastic expansion shell 2 is reversely assembled, the threaded portion 104 of the screw 1 is first screwed into the elastic expansion shell 2, but it is ensured that the conical portion 102 of the screw 1 is not yet in contact with the elastic tube 202 of the elastic expansion shell 2, then a mounting hole is drilled at a position where the expansion bolt is mounted, the diameter of the mounting hole is made larger than the outer diameter of the elastic expansion shell 2 and smaller than the outer diameter of the cylindrical section 206 on the enlarged portion 203, and then the elastic expansion shell 2 and the screw 1 are put into the mounting hole together. When the elastic expansion sleeve 2 is placed in the mounting hole, the enlarged portion 203 is pre-tightened with the inner wall of the mounting hole and generates friction force, and when the screw 1 is continuously screwed into the elastic expansion sleeve 2, the elastic expansion sleeve 2 cannot rotate and skid in the mounting hole under the action of the friction force, so that the screw 1 can be conveniently and rapidly screwed, and the mounting efficiency is improved. Meanwhile, because the diameter of the mounting hole is smaller than the outer diameter of the enlarged part 203, when the elastic expansion sleeve 2 is placed in the mounting hole, the enlarged part 203 on the elastic expansion sleeve 2 is pressed inwards under the action of the inner wall of the mounting hole, so that the inner hole of the elastic tube 202 of the elastic expansion sleeve 2 is changed into an inner conical hole from a round hole, when the screw 1 is continuously screwed into the elastic expansion sleeve 2 placed in the mounting hole, the conical part 102 of the screw 1 is contacted with the inner conical hole of the elastic tube 202 and generates strong expansion force, the screw 1 is screwed more, and the generated expansion force is larger, so that the whole expansion bolt is effectively prevented from falling out from the mounting hole, and the reliability and safety in use are ensured.
Claims (4)
1. The utility model provides a wear to explode formula expansion bolts, includes screw (1) and elasticity inflation cover (2), its characterized in that: screw (1) is by polished rod (101), circular cone portion (102), reducing pole (103) and screw thread portion (104) integral type structure of constituteing in proper order, elastic expansion cover (2) are by the integral type structure that pipe (201) and elastic tube (202) are constituteed, are provided with increase portion (203) on the outer wall of elastic tube (202), and the equipartition has expansion joint (204) on the lateral wall of elastic tube (202), are provided with continuous and run through internal thread in pipe (201) and elastic tube (202), screw thread portion (104) and internal thread fit.
2. The explosive expansion bolt according to claim 1, wherein: the minimum outer diameter of the conical part (102) is equal to the outer diameter of the diameter-reduced rod (103), and the outer diameter of the diameter-reduced rod (103) is smaller than the outer diameter of the threaded part (104).
3. The explosive expansion bolt according to claim 1, wherein: the sum of the lengths of the diameter reducing rod (103) and the threaded part (104) is larger than the length of the round pipe (201) or the elastic pipe (202).
4. The explosive expansion bolt according to claim 1, wherein: the enlarged part (203) consists of a guide cone section (205) and a cylindrical section (206), and the outer diameter of the cylindrical section (206) is larger than that of the elastic expansion sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320832273.7U CN219774547U (en) | 2023-04-14 | 2023-04-14 | Explosion-penetrating expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320832273.7U CN219774547U (en) | 2023-04-14 | 2023-04-14 | Explosion-penetrating expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219774547U true CN219774547U (en) | 2023-09-29 |
Family
ID=88105544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320832273.7U Active CN219774547U (en) | 2023-04-14 | 2023-04-14 | Explosion-penetrating expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219774547U (en) |
-
2023
- 2023-04-14 CN CN202320832273.7U patent/CN219774547U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240125 Address after: No. 27 Zhuoju Road, East Industrial Zone, Dongmingyang Village, Linmingguan Town, Yongnian District, Handan City, Hebei Province, 057150 Patentee after: Handan Zhong'ancheng Fastener Manufacturing Co.,Ltd. Country or region after: China Address before: No.7, Unit 1, No. 7, Qingnian Road, Nanming District, Guiyang City, Guizhou Province, 550005 Patentee before: Ran Li Country or region before: China |
|
| TR01 | Transfer of patent right |