CN210715466U - Detachable and reusable expansion bolt - Google Patents
Detachable and reusable expansion bolt Download PDFInfo
- Publication number
- CN210715466U CN210715466U CN201921838858.XU CN201921838858U CN210715466U CN 210715466 U CN210715466 U CN 210715466U CN 201921838858 U CN201921838858 U CN 201921838858U CN 210715466 U CN210715466 U CN 210715466U
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- Prior art keywords
- screw rod
- hole section
- expansion
- wall
- distance ring
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- Expired - Fee Related
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- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 16
- 238000009434 installation Methods 0.000 description 10
- 238000004873 anchoring Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a detachable and reusable expansion bolt, which comprises a bolt, an expansion pipe which can be arranged in a drill hole and a distance ring; the bolt comprises a screw rod, a nut fixed at the upper end of the screw rod and a spherical head fixed at the lower end of the screw rod, and the outer wall of the screw rod is provided with external threads; the expansion pipe is internally provided with a linear hole section and a conical hole section which are connected up and down, the inner wall of the linear hole section is provided with an internal thread matched with the external thread, the screw rod can be screwed into the linear hole section of the expansion pipe, the inner diameter of the conical hole section is gradually reduced from top to bottom, the inner wall of the conical hole section is provided with a plurality of cutting seams along the axial direction, and the spherical head can be pushed downwards into the conical hole section so as to expand the conical hole section; the distance ring is sleeved on the screw rod between the nut and the expansion pipe, the distance ring can be embedded between the screw rod and the inner wall of the drilled hole, and a flat pad is further sleeved on the screw rod between the distance ring and the nut. The utility model provides an expansion bolts convenient to detach, repeatedly usable.
Description
Technical Field
The utility model relates to an expansion bolts technical field, concretely relates to can dismantle and reuse expansion bolts.
Background
The expansion bolts (including expansion rings, expansion hooks and the like) commonly used by people in the current market are sleeve type bottom expansion bolts (namely expansion is carried out by expanding a sleeve by using a horn head at the bottom of the bolt), and the expansion bolts are simple in structure, low in manufacturing cost, convenient to install and deeply liked by people. But its drawbacks and limitations are also quite evident: firstly, can't dismantle after the installation, seriously influence pleasing to the eye, environmental protection even safety when abandoning the use. Because the expansion pipe is deformed and can not rebound after being expanded by the trumpet head, the expansion bolt can not be disassembled and taken out after being installed. If we often see the expansion bolts left after installing deceleration strips or traffic guardrails and advertising boards on the road surface, the screw rods are exposed on the road surface to form iron piles, so that the iron piles are not attractive and environment-friendly, and influence on traffic safety. If the iron piles are removed, a cutting machine is required, so that time and labor are wasted, only a part of screw rods exposed on the ground can be cut off, the screw rods are not cut cleanly, sharper iron thorns are easy to form, and more serious traffic hidden troubles are brought; secondly, the material can not be reused, which is not beneficial to environmental protection and saving; thirdly, the screw rod can outwards extend gradually when the installation is fastened, which is not beautiful and influences the anchoring force.
In recent years, some novel expansion bolts have appeared in the field of fasteners, and the defects and shortcomings of the traditional expansion bolts are overcome to a certain extent, so that some special requirements are met, but the expansion bolts are still unsatisfactory. For example, the shear type expansion bolt solves the problems of installation of the expansion bolt and disassembly and repeated use of the hollow wall, but the shear head is too large, so that the diameter of a drilled hole is required to be increased, the gap between the screw rod part and the inner wall of the hole is too large, transverse swinging is easy to generate to influence transverse anchoring force, the structure is relatively complex, and the manufacturing cost is also high; for example, the bottom-explosion type special bolt produced by some enterprises in Jiangsu is widely used in rail transit due to strong anchoring force, but the manufacturing process cost is high, so the price is high, the price of each bolt is seven eighty yuan or even hundreds yuan, and a special drilling tool is needed for installation and punching, so that the bolt is not suitable for common requirements; in addition, some plastic expansion pipe expansion bolts have simple structures and low cost, can be disassembled and reused, can only provide smaller anchoring force and are mainly used for white household appliance installation.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides an expansion bolts that can dismantle and reuse.
The utility model provides an expansion bolts that can dismantle and reuse, include: the bolt comprises a screw rod, a nut fixed at the upper end of the screw rod and a spherical head fixed at the lower end of the screw rod, and external threads are arranged on the outer wall of the screw rod; the expansion pipe can be placed in a drill hole, the expansion pipe is internally provided with a linear hole section and a conical hole section which are connected up and down, the inner wall of the linear hole section is provided with an internal thread matched with the external thread, the screw rod can be screwed into the linear hole section of the expansion pipe, the inner diameter of the conical hole section is gradually reduced from top to bottom, the inner wall of the conical hole section is axially provided with a plurality of cutting seams, and the spherical head can be pushed downwards into the conical hole section to expand the conical hole section; and the distance ring is sleeved on the screw rod between the nut and the expansion pipe, the distance ring can be embedded between the screw rod and the inner wall of the drilled hole, and a flat pad is further sleeved on the screw rod between the distance ring and the nut.
Furthermore, the lower end of the screw rod is provided with a cylindrical section, the spherical head is arranged at the lower end of the cylindrical section, and the diameter of the spherical head is larger than that of the cylindrical section.
Furthermore, an elastic cushion is further sleeved on the screw rod between the nut and the flat cushion.
Further, the flat pad and the distance ring are connected into an integral structure.
Furthermore, the outer peripheral surface of the conical hole section of the expansion pipe is provided with anti-skidding lines.
Furthermore, four equally-divided cutting seams are arranged on the inner wall of the pipe of the conical hole section.
The beneficial effects of the utility model are embodied in: during installation, a drill bit with the same type as the outer diameter of the expansion pipe is used for punching on a concrete or brick wall, the flat pad, the distance ring and the expansion pipe are sequentially assembled on the screw rod, the expansion pipe is screwed down to slightly expand the conical hole section at the lower part of the expansion pipe, the expansion degree can form friction force with the inner wall of a drilled hole, then the expansion bolt is tapped and placed into the drilled hole, and the bolt is screwed down by tools such as a wrench, so that the spherical head can expand the conical hole section of the expansion pipe and prop against the inner wall of the drilled hole. When the expansion bolt is abandoned, the bolt is unscrewed reversely, so that the spherical head at the lower end of the screw rod is withdrawn from the conical hole section of the expansion pipe, the expansion pipe is restored to the original state by metal memory, and the whole expansion bolt can be taken out easily and can be repeatedly used. Generally speaking, the diameter of drilling is about to be greater than the diameter of screw rod slightly, there is the clearance between screw rod and the drilling inner wall, produce the horizontal hunting easily and influence horizontal anchoring power, this application is through setting up the distance ring, the distance ring can inlay between screw rod and drilling, in order to eliminate the clearance between screw rod and the drilling, thereby reduce the horizontal hunting of screw rod, improve horizontal anchoring power, simultaneously, when the screw rod is twisted in the installation, the distance ring is installed in the drill way of drilling, can prevent to twist the drill way of screw rod to cause the destruction to drilling, thereby play the guard action to the drill way of drilling.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the drawings: 10 denotes a bolt; 11 denotes a screw; 12 denotes a nut; 13 denotes a spherical head; 14 denotes a cylindrical segment; 20 denotes an expansion pipe; 21 denotes a straight hole segment; 22 denotes a conical bore section; 221 denotes a kerf; 30 denotes a distance ring; 31 denotes a flat pad; 40 denotes a spring washer; 50 denotes an anti-skid thread; and 60 denotes a borehole.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
As shown in fig. 1, an embodiment of the present invention provides a detachable and reusable expansion bolt, including: a bolt 10, an expansion tube 20 placeable in the borehole 60 and a distance ring 30.
The bolt 10 comprises a screw 11, a nut 12 fixed at the upper end of the screw 11 and a spherical head 13 fixed at the lower end of the screw 11, wherein the outer wall of the screw 11 is provided with external threads. In this embodiment, the lower end of the screw 11 is provided with a cylindrical section 14, and the spherical head 13 is provided at the lower end of the cylindrical section 14, and the diameter of the spherical head 13 is larger than that of the cylindrical section 14. Of course, in other embodiments, the spherical head 13 may be directly connected to the lower end of the screw 11.
The expansion pipe 20 is internally provided with a linear hole section 21 and a conical hole section 22 which are connected up and down, the inner wall of the linear hole section 21 is provided with an internal thread matched with the external thread, the screw 11 can be screwed into the linear hole section 21 of the expansion pipe 20, the inner diameter of the conical hole section 22 is gradually reduced from top to bottom, the inner wall of the conical hole section 22 is provided with a plurality of cutting seams 221 along the axial direction, the spherical head 13 can be pushed downwards into the conical hole section 22 to expand the conical hole section 22, and in the embodiment, the inner wall of the conical hole section 22 is specifically provided with four cutting seams 221 which equally divide the conical hole section 22.
The distance ring 30 is sleeved on the screw rod 11 between the nut 12 and the expansion pipe 20, the distance ring 30 can be embedded between the screw rod 11 and the inner wall of the drill hole 60, and the flat pad 31 is also sleeved on the screw rod 11 between the distance ring 30 and the nut 12. In the present embodiment, the flat pad 31 is connected to the distance ring 30 as an integrated structure, which not only facilitates assembly, but also improves the stability of the installation of the expansion bolt. Of course, in other embodiments, the flat pad 31 and the distance ring 30 may be designed in a split manner.
During installation, a drill bit with the same type as the outer diameter of the expansion pipe 20 is used for drilling a hole in a concrete or brick wall, the flat pad 31, the distance ring 30 and the expansion pipe 20 are sequentially assembled on the screw rod 11, the expansion pipe 20 is screwed down to slightly expand the conical hole section 22 at the lower part of the expansion pipe to form friction force with the inner wall of the drill hole 60, then the expansion bolt is tapped into the drill hole 60, and a tool such as a wrench is used for screwing the bolt 10, so that the spherical head 13 expands the conical hole section 22 of the expansion pipe 20 and props against the inner wall of the drill hole 60. When the expansion bolt is abandoned, the bolt 10 is unscrewed reversely, so that the spherical head 13 at the lower end of the screw 11 is withdrawn from the conical hole section 22 of the expansion pipe 20, the expansion pipe 20 is restored by metal memory, and the whole expansion bolt can be easily taken out and can be repeatedly used. Generally speaking, the diameter of drilling 60 is slightly more than the diameter of screw rod 11, there is the clearance between screw rod 11 and the drilling 60 inner wall, easily produce the horizontal hunting and influence horizontal anchoring force, this application is through setting up distance ring 30, distance ring 30 can inlay between screw rod 11 and drilling 60 to eliminate the clearance between screw rod 11 and the drilling 60, thereby reduce the horizontal hunting of screw rod 11, improve horizontal anchoring force, simultaneously, when installing and twisting screw rod 11, distance ring 30 installs in the drill way of drilling 60, can prevent to twist the drill way of screw rod 11 to cause the destruction to drilling 60, thereby play the guard action to the drill way of drilling 60.
In this embodiment, the elastic pad 40 is further sleeved on the screw 11 between the nut 12 and the flat pad 31, after the installation is completed, the elastic pad 40 is clamped between the nut 12 and the flat pad 31, and the elastic pad provides an elastic tension force for the bolt 10, so that the bolt 10 can be prevented from loosening. In addition, the outer peripheral surface of the tapered hole section 22 of the expansion pipe 20 is provided with the anti-slip threads 50, and the anti-slip threads 50 can increase the friction force between the tapered hole section 22 of the expansion pipe 20 and the inner wall of the drill hole 60 and improve the anchoring force between the expansion bolt and the drill hole 60.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (6)
1. A removable and reusable expansion bolt comprising:
the bolt comprises a screw rod, a nut fixed at the upper end of the screw rod and a spherical head fixed at the lower end of the screw rod, and external threads are arranged on the outer wall of the screw rod;
the expansion pipe can be placed in a drill hole, the expansion pipe is internally provided with a linear hole section and a conical hole section which are connected up and down, the inner wall of the linear hole section is provided with an internal thread matched with the external thread, the screw rod can be screwed into the linear hole section of the expansion pipe, the inner diameter of the conical hole section is gradually reduced from top to bottom, the inner wall of the conical hole section is axially provided with a plurality of cutting seams, and the spherical head can be pushed downwards into the conical hole section to expand the conical hole section;
and the distance ring is sleeved on the screw rod between the nut and the expansion pipe, the distance ring can be embedded between the screw rod and the inner wall of the drilled hole, and a flat pad is further sleeved on the screw rod between the distance ring and the nut.
2. The removable and reusable expansion bolt according to claim 1, wherein the lower end of said threaded shank is provided with a cylindrical section, said spherical head is provided at the lower end of said cylindrical section, and the diameter of the spherical head is larger than the diameter of the cylindrical section.
3. The removable and reusable expansion bolt of claim 1 wherein a resilient washer is also fitted over the shank between the nut and the flat washer.
4. The removable and reusable expansion bolt according to claim 1, characterized in that the flat pad is connected to the distance ring as a one-piece structure.
5. The removable and reusable expansion bolt according to claim 1, characterized in that the outer peripheral surface of the tapered bore section of the expansion tube is provided with anti-slip threads.
6. The removable and reusable expansion bolt according to claim 1 wherein the inner pipe wall of said tapered bore section is provided with four slits bisecting it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838858.XU CN210715466U (en) | 2019-10-29 | 2019-10-29 | Detachable and reusable expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838858.XU CN210715466U (en) | 2019-10-29 | 2019-10-29 | Detachable and reusable expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210715466U true CN210715466U (en) | 2020-06-09 |
Family
ID=70965691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921838858.XU Expired - Fee Related CN210715466U (en) | 2019-10-29 | 2019-10-29 | Detachable and reusable expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210715466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981851A (en) * | 2021-11-18 | 2022-01-28 | 刘保英 | Deceleration strip installation device with automatic calibration function for highway construction |
-
2019
- 2019-10-29 CN CN201921838858.XU patent/CN210715466U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981851A (en) * | 2021-11-18 | 2022-01-28 | 刘保英 | Deceleration strip installation device with automatic calibration function for highway construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200609 |