CN219994109U - Rotation-stopping reverse-hanging expansion bolt - Google Patents
Rotation-stopping reverse-hanging expansion bolt Download PDFInfo
- Publication number
- CN219994109U CN219994109U CN202321683515.7U CN202321683515U CN219994109U CN 219994109 U CN219994109 U CN 219994109U CN 202321683515 U CN202321683515 U CN 202321683515U CN 219994109 U CN219994109 U CN 219994109U
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- expansion
- screw
- expansion sleeve
- sleeve
- utility
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- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses a rotation-stopping inverted hanging expansion bolt which comprises a screw and an expansion sleeve, wherein the screw sequentially comprises an integrated structure consisting of a polish rod, a diameter-reducing rod and a threaded part, the diameter-reducing rod is rotationally connected with a conical sleeve, the expansion sleeve comprises an integrated structure consisting of a circular pipe and an elastic pipe, expansion joints are uniformly distributed on the side wall of the elastic pipe, and internal threads matched with the threaded part are arranged in the circular pipe. The utility model adopts the rotatable conical sleeve to contact with the elastic tube of the expansion sleeve, and when the screw is screwed into the expansion sleeve, the conical sleeve only provides bulging acting force, so that friction force and torque between the screw and the expansion sleeve are eliminated, and the expansion sleeve is prevented from deforming and cannot be reused. Meanwhile, the utility model has only two parts of the screw and the expansion sleeve, and the two parts have simple structure, are easy to process and reduce the manufacturing cost.
Description
Technical Field
The utility model relates to a rotation-stopping inverted hanging 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. For example, in the prior art, chinese patent publication No. CN217842281U, entitled "two-piece expansion bolt assembly" discloses an expansion bolt, which has a simple structure, is firmly fixed, is convenient to install, has only two parts, has low processing cost, and can be reused after being disassembled. However, when the screw of the expansion bolt is screwed into the expansion sleeve, strong friction force and torque are generated between the conical section of the screw and the inner conical tube of the expansion sleeve, and under the combined action of the two forces, the inner conical tube of the expansion sleeve is deformed, so that the disassembly is not influenced, and the expansion sleeve cannot be reused after the disassembly.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the anti-rotation inverted hanging type 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 rotation-stopping reverse hanging expansion bolt, includes screw and expansion sleeve, the screw is by polished rod, reducing pole and the integral type structure that screw thread portion constitutes in proper order, rotates on the reducing pole and is connected with the toper cover, the expansion sleeve is by the integral type structure that pipe and elastic tube constitute, and the equipartition has the expansion joint on the lateral wall of elastic tube, is provided with the internal thread that matches with screw thread portion in the pipe.
Further, the outer diameter of the threaded portion is larger than the outer diameter of the reducing rod, and the inner diameter of the expansion sleeve is larger than the outer diameter of the threaded portion.
Further, the length of the expansion shell is greater than or equal to the length of the threaded portion.
Due to the adoption of the technical scheme, the utility model has the advantages that: the utility model adopts the rotatable conical sleeve to contact with the elastic tube of the expansion sleeve, and when the screw is screwed into the expansion sleeve, the conical sleeve only provides bulging acting force, so that friction force and torque between the screw and the expansion sleeve are eliminated, and the expansion sleeve is prevented from deforming and cannot be reused. Meanwhile, the utility model has only two parts of the screw and the expansion sleeve, and the two parts have simple structure, are easy to process and reduce the manufacturing cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic view of the structure of the taper sleeve.
Reference numerals illustrate: 1-screw, 101-polish rod, 102-diameter reducing rod, 103-screw thread part, 2-expansion sleeve, 201-elastic tube, 202-round tube, 203-expansion joint and 3-conical sleeve.
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 anti-rotation reverse hanging expansion bolt of the utility model comprises a screw 1 and an expansion sleeve 2, wherein the screw 1 sequentially comprises an integrated structure composed of a polish rod 101, a diameter reducing rod 102 and a threaded part 103, the diameter reducing rod 102 is rotationally connected with a conical sleeve 3, the expansion sleeve 2 comprises an integrated structure composed of a circular tube 202 and an elastic tube 201, expansion joints 203 are uniformly distributed on the side wall of the elastic tube 201, and internal threads matched with the threaded part 103 are arranged in the circular tube 202. The outer diameter of the thread part 103 is larger than that of the diameter reducing rod 102, and the inner diameter of the expansion sleeve 2 is larger than that of the thread part 103; the length of the expansion shell 2 is greater than or equal to the length of the threaded portion 103.
The working principle of the utility model is as follows:
as shown in fig. 1, at the time of installation, first, the screw portion 103 of the screw 1 is screwed into the circular tube 202 of the expansion sleeve 2, the tapered sleeve 3 is brought into contact with the mouth portion of the elastic tube 201, the mouth portion of the elastic tube 201 is inflated, and then the expansion sleeve 2 and the screw 1 are put together into the installation hole. After the expansion sleeve 2 is placed in the mounting hole, the outer wall of the opening of the elastic tube 201 is pre-tightened with the inner wall of the mounting hole, friction force is generated, and when the screw 1 is continuously screwed into the expansion sleeve 2, the expansion sleeve 2 cannot rotationally slip 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. When the screw 1 is screwed in, the conical sleeve 3 forces the elastic tube 201 of the expansion sleeve 2 to be further increased, so that the elastic tube 201 generates strong expansion force in the mounting hole, and the expansion sleeve 2 can be fixed in the mounting hole; the more the screw 1 is screwed in, the larger the generated expansion force is, so that the whole expansion bolt is effectively prevented from being separated from the mounting hole, and the reliability and the safety in use are ensured.
In summary, the rotatable conical sleeve 3 is in contact with the elastic tube 201 of the expansion sleeve, and when the screw is screwed into the expansion sleeve, the conical sleeve 3 only provides the bulging force, so that the friction force and torque between the screw 1 and the expansion sleeve 2 are eliminated, and the expansion sleeve 2 is prevented from deforming and cannot be reused. Meanwhile, the utility model only has two parts of the screw 1 and the expansion sleeve 2, and the two parts have simple structure, are easy to process and reduce the manufacturing cost.
Claims (3)
1. The utility model provides a rotation-stopping reverse hanging expansion bolt, includes screw (1) and expansion shell (2), its characterized in that: screw (1) is by polished rod (101), reducing pole (102) and screw thread portion (103) integral type structure of constituteing in proper order, rotates on reducing pole (102) and is connected with toper cover (3), the integral type structure that expansion cover (2) were constituteed by pipe (202) and elastic tube (201), and the equipartition has expansion joint (203) on the lateral wall of elastic tube (201), is provided with the internal thread that matches with screw thread portion (103) in pipe (202).
2. The anti-rotation reverse hanging expansion bolt according to claim 1, wherein: the outer diameter of the threaded part (103) is larger than that of the diameter-reducing rod (102), and the inner diameter of the expansion sleeve (2) is larger than that of the threaded part (103).
3. The anti-rotation reverse hanging expansion bolt according to claim 1, wherein: the length of the expansion sleeve (2) is greater than or equal to the length of the threaded portion (103).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321683515.7U CN219994109U (en) | 2023-06-29 | 2023-06-29 | Rotation-stopping reverse-hanging expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321683515.7U CN219994109U (en) | 2023-06-29 | 2023-06-29 | Rotation-stopping reverse-hanging expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219994109U true CN219994109U (en) | 2023-11-10 |
Family
ID=88615631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321683515.7U Active CN219994109U (en) | 2023-06-29 | 2023-06-29 | Rotation-stopping reverse-hanging expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219994109U (en) |
-
2023
- 2023-06-29 CN CN202321683515.7U patent/CN219994109U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |