CN203308873U - Double-protection bolt - Google Patents
Double-protection bolt Download PDFInfo
- Publication number
- CN203308873U CN203308873U CN2013202779393U CN201320277939U CN203308873U CN 203308873 U CN203308873 U CN 203308873U CN 2013202779393 U CN2013202779393 U CN 2013202779393U CN 201320277939 U CN201320277939 U CN 201320277939U CN 203308873 U CN203308873 U CN 203308873U
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- China
- Prior art keywords
- nut
- screw
- screw part
- protection bolt
- double
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- Expired - Fee Related
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Abstract
The utility model provides a double-protection bolt which comprises nuts and a screw. The nuts comprise a first nut and a second nut, the first nut and the screw are integrally formed and the screw is divided into a first screw part and a second screw part, at least two blind holes are formed in the first screw part, the second nut can be screwed to the first screw part and conceal the blind holes, and small holes formed in the side, far away from the first nut, of the second nut. When the double-protection bolt is mounted, a special tool is needed to screw the double-protection bolt through the blind holes, and then the second nut is screwed to the first screw part to conceal the first nut and the blind holes through another special tool. When the double-protection bolt is demounted, the second nut needs to be demounted firstly; due to the fact that the second nut conceals the first nut and the blind holes completely after the double-protection bolt is mounted, a thief who does not know the structure of the bolt can not demount the double-protection bolt completely even if the thief makes a tool used for screwing and demounting the second nut in advance; therefore, the purpose of theft prevention is achieved, equipment is prevented from being stolen, and potential safety hazards are eliminated.
Description
Technical field
The utility model relates to bolt and manufactures field, particularly relates to a kind of duplicate protection bolt.
Background technique
Bolt is a kind of link commonly used and fastening piece.The nut of traditional bolt is generally outer-hexagonal or interior hexagonal structure, and this kind structure just can screw flexibly by general Wrench, is convenient to dismounting or installs.But, exactly because easily screwing of conventional bolt makes the stolen of some costlinesses and safety guarantee equipment, such as, power equipment, railway equipment etc., produced huge economy and damaged and potential safety hazard.
The model utility content
Based on this, be necessary easily to screw and the stolen problem of equipment that causes for traditional bolt, a kind of anti-theft bolt that adopts Allen wrench to screw is provided.
A kind of duplicate protection bolt; comprise nut and screw rod; described nut comprises the first nut and the second nut; described the first nut and described screw rod are one-body molded and described screw rod is divided into to the first screw part and the second screw part; described the first screw part has at least two blind holes; described the second nut can screw in the first screw part and hide described blind hole, and described the second nut is provided with aperture away from a side of described the first nut.
Therein in embodiment, the side that described the first nut closes on described the first screw part is the umbrella section of cutting top, described the second nut closes on the depressed part that a side of described the first nut has indent, described the second nut screws when described the first screw part, and described depressed part can be covered described umbrella section.
In embodiment, described the second nut is circular platform away from a side of described the first nut therein, and the side of described the second nut is level and smooth curve.
In embodiment, also comprise pad therein, described pad pad is located between described the first nut and described the second nut, and the shape of described pad and described umbrella section is complementary.
In embodiment, it is circular that described blind hole and described aperture are respectively therein.
Above-mentioned duplicate protection bolt, during installation, need special tool to screw by blind hole, and then by another special tool, the second nut is screwed and the first screw part, to hide the first nut and blind hole.During dismounting, at first need to dismantle the second nut, after installing, the second nut is hidden the first nut and blind hole fully, for the robber who does not understand bolt arrangement, even if prepare in advance be used to the instrument that screws the second nut and by the second nut dismounting, also can't dismantle fully, thereby reached antitheft purpose, avoided the stolen of equipment, eliminated potential safety hazard.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment's duplicate protection bolt.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As shown in Figures 1 and 2, in one embodiment, a kind of duplicate protection bolt, comprise nut 110 and screw rod 120.Nut 110 comprises the first nut 112 and the second nut 114, the first nut 112 and screw rod 120 are one-body molded and screw rod 120 is divided into to the first screw part 122 and the second screw part 124, the first screw part 122 has at least two blind holes 1222, the second nut 114 can screw in the first screw part 122 and hide blind hole 1222, the second nuts 114 and be provided with aperture 1142 away from a side of the first nut 112.Usually, blind hole 1222 is respectively circular with aperture 1142.Be understood that, blind hole 1222 can also be respectively other shapes with aperture 1142.
Above-mentioned duplicate protection bolt, during installation, need special tool to screw by blind hole 1222, and then by another special tool, the second nut 114 is screwed and the first screw part 124, to hide the first nut 112 and blind hole 1222.During dismounting, at first need to dismantle the second nut 114, after installing, the second nut 114 is hidden the first nut 112 and blind hole 1222 fully, for the robber who does not understand bolt arrangement, even if prepare in advance be used to the instrument that screws the second nut 114 and by the second nut 114 dismountings, also can't dismantle fully, thereby reached antitheft purpose, avoided the stolen of equipment, eliminated potential safety hazard.
In specific embodiment, the side that the first nut 112 closes on the first screw part 122 is the umbrella section of cutting top, the second nut 114 closes on the depressed part that a side of the first nut 112 has indent, and the second nut screws when the first screw part 122, and depressed part can be covered umbrella section.The second nut 114 is circular platform away from a side of the first nut 112, and the side of the second nut 114 is level and smooth curve.In the present embodiment, the duplicate protection bolt also comprises pad 130, and pad pad 130 is located between the first nut 112 and the second nut 114, and pad 130 is complementary with the shape of umbrella section.
The above embodiment has only expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. duplicate protection bolt; it is characterized in that; comprise nut and screw rod; described nut comprises the first nut and the second nut; described the first nut and described screw rod are one-body molded and described screw rod is divided into to the first screw part and the second screw part; described the first screw part has at least two blind holes, and described the second nut can screw in the first screw part and hide described blind hole, and described the second nut is provided with aperture away from a side of described the first nut.
2. duplicate protection bolt according to claim 1; it is characterized in that; the side that described the first nut closes on described the first screw part is the umbrella section of cutting top; described the second nut closes on the depressed part that a side of described the first nut has indent; described the second nut screws when described the first screw part, and described depressed part can be covered described umbrella section.
3. duplicate protection bolt according to claim 2, is characterized in that, described the second nut is circular platform away from a side of described the first nut, and the side of described the second nut is level and smooth curve.
4. duplicate protection bolt according to claim 2, is characterized in that, also comprises pad, and described pad pad is located between described the first nut and described the second nut, and the shape of described pad and described umbrella section is complementary.
5. duplicate protection bolt according to claim 1, is characterized in that, it is circular that described blind hole and described aperture are respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202779393U CN203308873U (en) | 2013-05-17 | 2013-05-17 | Double-protection bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202779393U CN203308873U (en) | 2013-05-17 | 2013-05-17 | Double-protection bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203308873U true CN203308873U (en) | 2013-11-27 |
Family
ID=49615086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202779393U Expired - Fee Related CN203308873U (en) | 2013-05-17 | 2013-05-17 | Double-protection bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203308873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821814A (en) * | 2014-03-11 | 2014-05-28 | 路荃琪 | Anti-theft and anti-disassembly nut shield |
-
2013
- 2013-05-17 CN CN2013202779393U patent/CN203308873U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821814A (en) * | 2014-03-11 | 2014-05-28 | 路荃琪 | Anti-theft and anti-disassembly nut shield |
| CN103821814B (en) * | 2014-03-11 | 2016-01-06 | 李一达 | A kind of nut anti-theft unloads guard shield |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20140517 |