CN2385125Y - Hollow expansion bolt - Google Patents
Hollow expansion bolt Download PDFInfo
- Publication number
- CN2385125Y CN2385125Y CN 99236559 CN99236559U CN2385125Y CN 2385125 Y CN2385125 Y CN 2385125Y CN 99236559 CN99236559 CN 99236559 CN 99236559 U CN99236559 U CN 99236559U CN 2385125 Y CN2385125 Y CN 2385125Y
- Authority
- CN
- China
- Prior art keywords
- hollow
- bolt
- hollow bolt
- expansion bolt
- utility
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a hollow expansion bolt which is used for fastening and connecting, which is composed of the hollow bolt and a core shaft, wherein, the middle of the hollow bolt is provided with a core hole, and the head part of the hollow bolt is respectively provided with a straight slot or a cross slot and a reverse-slide preventing tail pattern; the core shaft is inlaid inside the core hole of the hollow bolt. The head part is expanded and the hollow expansion bolt is fixed. In addition, the hollow bolt is prevented from sliding out by the reverse-slide preventing tail pattern. The hollow expansion bolt is characterized in simple and reasonable structure, no gaps, high cutting strength, impossibility of shortening effective length, reliable and firm while connecting, convenient use, and convenient operation. The hollow expansion bolt can be widely used for equipment installation, building finishing, home life, etc.
Description
The utility model relates to a kind of hollow expansion bolt of fastening connection usefulness.
At present, connecting the fastening piece of usefulness with concrete or body of wall, is to adopt solid expand tube EXPANSION ANCHOR BOLTS basically, and it forces expand tube to expand to reach fastening purpose by screwing solid bolt.Its deficiency is: the area increment was less after 1, expand tube expanded, and connected firm inadequately; 2, the installation bore diameter is bigger than nominal diameter, and is gapped between solid bolt, expand tube and the boring, when being subjected to lateral load to be, might produce the phenomenon that gets loose; 3, effective length top short, that connect the solid bolt in back is too much protruded coupled, and both waste material influenced attractive in appearance again.
The purpose of this utility model is exactly that a kind of firm, shear strength hollow expansion bolt big and easy to use rational in infrastructure, reliable is provided in order to overcome above-mentioned deficiency.
The utility model is to be made of hollow bolt 1 and mandrel 2, and there is a core hole 3 centre of hollow bolt 1, and the head of hollow bolt 1 has the decorative pattern at the end of a poem, article, etc. where there is a small blank space 5 of straight groove or cross recess 4 and anti-back skating respectively, and mandrel 2 is embedded in the core hole 3 of hollow bolt 1.
The utility model will be further described below in conjunction with accompanying drawing:
Fig. 1 is the structural representation of the utility model hollow bolt.
Fig. 2 is an axle core form structure schematic representation of the present utility model.
Fig. 3 is the left view of the utility model hollow bolt.
Fig. 4 is the right elevation of the utility model hollow bolt.
Referring to Fig. 1～Fig. 4, the effect of straight groove of the present utility model or cross recess 4 is for the head that makes hollow bolt 1 can expand and be fixed in concrete or the body of wall, and the effect of the decorative pattern at the end of a poem, article, etc. where there is a small blank space 5 of anti-back skating is to prevent that hollow bolt 1 from skidding off in concrete or body of wall.Because the expansion area increment of the solid EXPANSION ANCHOR BOLTS that the expansion area incremental raio of hollow bolt 1 of the present utility model is common is big by about 40%, and there is no the gap between hollow bolt 1 and concrete or the body of wall, thereby, the utility model is firmly reliable more when being used to connect object, can not produce loosening phenomenon.In addition,, overcome the thick and uneven defective of round steel core crystal grain, be equipped with high-intensity mandrel 2 again, thereby improve shear strength of the present utility model because the utility model adopts hollow-core construction.The utility model in use, hole in concrete or body of wall by the nominal size of hollow bolt 1 earlier, then, hollow bolt 1 is inserted in the boring, again mandrel 2 is knocked in and is embedded in the core hole 3 of hollow bolt 1, the head of hollow bolt 1 is expanded and be fixed in concrete or the body of wall, and the decorative pattern at the end of a poem, article, etc. where there is a small blank space 5 by anti-back skating guarantees that hollow bolt 1 can not skid off concrete or body of wall and guarantee that its effective length can not shorten, and the screw thread 6 by hollow bolt 1 afterbody was fixed on concrete or the body of wall coupled with cooperating of nut at last.
Characteristics of the present utility model are: simple and reasonable, very close to each other, shear strong Degree is big, can not shorten effective length, and is reliably firm during connection, use, easy to operate, Can be widely used in equipment installation, construction and decoration and life staying idle at home etc.
Claims (2)
1, a kind of hollow expansion bolt of fastening connection usefulness, it is characterized in that constituting by hollow bolt (1) and mandrel (2), there is a core hole (3) centre of hollow bolt (1), and the head of hollow bolt (1) has straight groove or cross recess (4), and mandrel (2) is embedded in the core hole (3) of hollow bolt (1).
2, according to the described hollow expansion bolt of claim, the head that it is characterized in that hollow bolt (1) has the decorative pattern at the end of a poem, article, etc. where there is a small blank space (5) of an anti-back skating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99236559 CN2385125Y (en) | 1999-07-08 | 1999-07-08 | Hollow expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99236559 CN2385125Y (en) | 1999-07-08 | 1999-07-08 | Hollow expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2385125Y true CN2385125Y (en) | 2000-06-28 |
Family
ID=34024360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99236559 Expired - Fee Related CN2385125Y (en) | 1999-07-08 | 1999-07-08 | Hollow expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2385125Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586590A (en) * | 2021-08-02 | 2021-11-02 | 航天精工股份有限公司 | High-locking anti-crack mandrel and closing method thereof |
-
1999
- 1999-07-08 CN CN 99236559 patent/CN2385125Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586590A (en) * | 2021-08-02 | 2021-11-02 | 航天精工股份有限公司 | High-locking anti-crack mandrel and closing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |