CN203655852U - Anti-retraction bolt - Google Patents
Anti-retraction bolt Download PDFInfo
- Publication number
- CN203655852U CN203655852U CN201320831024.2U CN201320831024U CN203655852U CN 203655852 U CN203655852 U CN 203655852U CN 201320831024 U CN201320831024 U CN 201320831024U CN 203655852 U CN203655852 U CN 203655852U
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- CN
- China
- Prior art keywords
- screw
- thread
- bolt
- bolt head
- guide rod
- 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 an anti-retraction bolt. The bolt comprises a bolt head, a screw and a thread screwing part. The bolt head is composed of an upper round-head screw and a lower round-head screw, the lower round-head screw is concentric with the upper round-head screw and different from the upper round-head screw in diameter, and fine left-hand external threads are arranged at the upper end of the bolt head. The bolt is further provided with an external nut, and the external nut is provided with fine left-hand internal threads matched with the fine left-hand external threads of the bolt head. A guide rod is arranged at one end of the thread screwing part and provided with a guide rod thread screwing part opposite to the thread structure of screw thread ridges. After the bolt head is installed into the external nut and screwed through a spanner and reaches rated torque, the fine left-hand external threads and the fine left-hand internal threads are damaged and can not be meshed with each other, then the bolt can not be disassembled any more through common methods or tools, and the anti-theft purpose is achieved. The bolt can not be screwed into a female-thread component when the bolt inclines and can not be screwed into the female-thread component any more on unsuitable situations, and therefore the bolt can be prevented from being locked or clamped.
Description
Technical field
The utility model relates to fastener areas, particularly a kind of Dogbolt.
Background technique
Bolt is by head and a screw rod class fastening piece dimerous, need coordinate with nut, for being fastenedly connected two parts with through hole.This Connecting format claims bolt to connect.As nut is screwed off from bolt, can make again these two parts separately.
Existing conventional bolt and nut fastening piece, for the indispensable strength member connecting between mechanical part and device is fixing, bolt and nut fastening piece uses very convenient, install easily, it is also easy to dismantle, but for the bolt and nut fastening piece being in the Infrastructure in field, it is very important that its Security just seems, as the bolt and nut fastening piece of using in the Infrastructure such as railway, highway bridge, electric power pylon, microwave communication tower.Because it can disassemble easily, therefore, the object of often being stolen or destroying by lawless person, causes the hidden danger being absolutely unsafe or is directly destroyed to these Infrastructure.At present conventional bolt tilts larger with respect to box thread member, bolt may its attitude suitably not guided in the time screwing in the box thread portion of box thread member, that is to say, bolt keeps tilting, may in the time screwing in box thread member, depart from the problem of thread pitch with regard to having produced bolt, also may produce thus and to kill and card rolls.
Model utility content
The purpose of this utility model be to provide a kind of simple in structure, cost is low, the Dogbolt of easy to operate and good anti-theft effect, this bolt prevents from itself from being killed or blocking and roll in box thread member reliably.
The utility model for the technological scheme that its technical problem of solution adopts is,
A kind of Dogbolt, the screw rod that comprise bolt head, extends to form from described bolt head bottom surface downwards and the screw thread being formed in described screw rod outer rim screw portion, and screw thread screws portion and on screw rod, forms screw flight ridge; It is characterized in that:
With one heart and the different round end screw rod of diameter forms lower round end screw rod is thinner by upper and lower for described bolt head, and its upper end is provided with closely-pitched sinistral external thread; Also being provided with one matches for driving the fastening outer nut of bolt head with described bolt head, described outer nut is established the hexagon nut of the upper and lower cylindrical hole matching with described upper and lower round end screw rod in being, lower cylindrical hole is thinner, which is provided with the closely-pitched levogyrate inner thread matching with the closely-pitched sinistral external thread of described bolt head;
Screw portion at described screw thread and be provided with a guide rod away from one end of bolt head, the diameter of described guide rod is less than the diameter of screw rod, is provided with the guide rod screw thread being formed in described guide rod outer rim and screws portion on described guide rod; With respect to described screw flight ridge, be formed on the guide rod thread ridges that described guide rod screw thread screws in portion and be formed reverse thread structure.
Further, be fixed with an annular shell fragment at the screw rod of described bolt head on face, the center of described annular shell fragment is towards screw rod direction protuberance, and described screw rod runs through annular shell fragment.
Compared with prior art, the utility model Dogbolt has following advantage:
1, the utility model is provided with the guide rod screw thread being formed in described guide rod outer rim and screws portion on guide rod; With respect to described screw flight ridge, be formed on the guide rod thread ridges that described guide rod screw thread screws in portion and be formed reverse thread structure.Can not precession box thread member in the time of tilt bolt, so bolt again can revolve box thread member in inappropriate situation.Therefore, can prevent reliably bolt kill and card rolls.
2, the utility model is provided with bolt head and the outer nut of mutual coupling, bolt head is tightened by spanner after packing outer nut into, while reaching rated torque, closely-pitched sinistral external thread and closely-pitched levogyrate inner thread destroy stripped thread, outer nut can only skid in bolt head periphery, just again bolt cannot be unloaded with conventional means and instrument, to reach antitheft object.
3, the screw rod of bolt head described in the utility model is fixed with annular shell fragment on face, and swell towards screw rod direction at the center of described annular shell fragment.Therefore be connected part when fixing by two soon by this Dogbolt, the annular elastomeric sector-meeting of the screw rod of its bolt head on face starts to contact a side surface that is connected part, along with further tightening of this Dogbolt, annular shell fragment in above-mentioned will start distortion, thereby produce a rebounding force to being connected part, being finally two is connected between part and remains and guarantee two connective stabilities that are connected between part by certain tension force.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model Dogbolt.
In figure: 1, bolt head, 2, screw rod, 3, screw thread screws portion, 31, screw flight ridge, 4, annular shell fragment, 5, guide rod screw thread screws portion, 51, guide rod thread ridges, 6, outer nut, 7, guide rod.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with illustrating and specific embodiment, further set forth the utility model.
Dogbolt as shown in Figure 1, the screw rod 2 that comprise bolt head 1, extends to form from described bolt head 1 bottom surface downwards and the screw thread being formed in described screw rod 2 outer rims screw portion 3, and screw thread screws portion 3 and on screw rod 2, forms screw flight ridge 31.
With one heart and the different round end screw rod of diameter forms lower round end screw rod is thinner by upper and lower for described bolt head 1, and its upper end is provided with closely-pitched sinistral external thread; Also being provided with one matches for driving the fastening outer nut of bolt head 16 with described bolt head 1, described outer nut 6 is established the hexagon nut of the upper and lower cylindrical hole matching with described upper and lower round end screw rod in being, lower cylindrical hole is thinner, which is provided with the closely-pitched levogyrate inner thread matching with the closely-pitched sinistral external thread of described bolt head 1.The upper round end screw rod of described bolt head 1 embeds the upper pitch cylinder hole of described outer nut 6.Bolt head 1 is tightened by spanner after packing outer nut 6 into, while reaching rated torque, closely-pitched sinistral external thread and closely-pitched levogyrate inner thread destroy stripped thread, and outer nut 6 can only skid in bolt head 1 periphery, just again bolt cannot be unloaded with conventional means and instrument, to reach antitheft object.
Screw portion 3 at described screw thread and be provided with a guide rod 7 away from one end of bolt head 1, the diameter of described guide rod 7 is less than the diameter of screw rod 2, is provided with the guide rod screw thread being formed in described guide rod 7 outer rims and screws portion 5 on described guide rod 7; With respect to described screw flight ridge 31, be formed on the guide rod thread ridges 51 that described guide rod screw thread screws in portion 5 and be formed reverse thread structure.
When this tilt bolt while inserting box thread part, the guide rod 7 of bolt disturbs with the box thread part of box thread member, or guide rod 7 occurs to disturb and guide rod 7 on the guide rod thread ridges 51 that forms and the box thread of box thread member intermesh.If guide rod 7 just and box thread part disturb, bolt after enter in box thread member.Next, if the guide rod thread ridges 51 of guide rod 7 engages with box thread, in the time that bolt screws in the direction rotation of box thread member, because the guide rod thread ridges 51 with reverse thread structure of guide rod 7 and the engagement of box thread part are exited bolt from box thread member, reach and prevented that bolt from killing and blocking the object of rolling.
On face, be fixed with annular shell fragment 4 at the screw rod 2 of described bolt head 1, the center of described annular shell fragment 4 is towards screw rod 2 direction protuberances, and described screw rod 2 runs through annular shell fragment 4.Be connected part when fixing by two soon by this Dogbolt, the annular shell fragment 4 of the screw rod 2 of its bolt head 1 on face can start to contact a side surface that is connected part, along with further tightening of this Dogbolt, annular shell fragment 4 in above-mentioned will start distortion, thereby produce a rebounding force to being connected part, being finally two is connected between part and remains and guarantee two connective stabilities that are connected between part by certain tension force.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.
The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a Dogbolt, the screw rod (2) that comprises bolt head (1), extend to form from described bolt head (1) bottom surface downwards and the screw thread being formed in described screw rod (2) outer rim screw portion (3), and screw thread screws portion (3) at the upper screw flight ridge (31) that forms of screw rod (2); It is characterized in that:
With one heart and the different round end screw rod of diameter forms lower round end screw rod is thinner by upper and lower for described bolt head (1), and its upper end is provided with closely-pitched sinistral external thread; Also being provided with one matches for driving the fastening outer nut (6) of bolt head (1) with described bolt head (1), described outer nut (6) is established the hexagon nut of the upper and lower cylindrical hole matching with described upper and lower round end screw rod in being, lower cylindrical hole is thinner, which is provided with the closely-pitched levogyrate inner thread matching with the closely-pitched sinistral external thread of described bolt head (1);
Screw portion (3) at described screw thread and be provided with a guide rod (7) away from one end of bolt head (1), the diameter of described guide rod (7) is less than the diameter of screw rod (2), is provided with the guide rod screw thread being formed in described guide rod (7) outer rim and screws portion (5) on described guide rod (7); With respect to described screw flight ridge (31), be formed on the guide rod thread ridges (51) that described guide rod screw thread screws in portion (5) and be formed reverse thread structure.
2. Dogbolt according to claim 1, it is characterized in that: on face, be fixed with an annular shell fragment (4) at the screw rod (2) of described bolt head (1), the center of described annular shell fragment (4) is towards screw rod (2) direction protuberance, and described screw rod (2) runs through annular shell fragment (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320831024.2U CN203655852U (en) | 2013-12-16 | 2013-12-16 | Anti-retraction bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320831024.2U CN203655852U (en) | 2013-12-16 | 2013-12-16 | Anti-retraction bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203655852U true CN203655852U (en) | 2014-06-18 |
Family
ID=50922243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320831024.2U Expired - Fee Related CN203655852U (en) | 2013-12-16 | 2013-12-16 | Anti-retraction bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203655852U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632306A (en) * | 2015-01-30 | 2015-05-20 | 无锡市曙光高强度紧固件有限公司 | Double-screw bolt used for steam turbine |
| CN109056426A (en) * | 2018-08-23 | 2018-12-21 | 中南大学 | A kind of locking screw spike |
| CN116581623A (en) * | 2023-05-31 | 2023-08-11 | 安费诺高速技术(南通)有限公司 | Machining and assembling method of anti-withdrawal connector assembly |
-
2013
- 2013-12-16 CN CN201320831024.2U patent/CN203655852U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632306A (en) * | 2015-01-30 | 2015-05-20 | 无锡市曙光高强度紧固件有限公司 | Double-screw bolt used for steam turbine |
| CN109056426A (en) * | 2018-08-23 | 2018-12-21 | 中南大学 | A kind of locking screw spike |
| CN116581623A (en) * | 2023-05-31 | 2023-08-11 | 安费诺高速技术(南通)有限公司 | Machining and assembling method of anti-withdrawal connector assembly |
| CN116581623B (en) * | 2023-05-31 | 2024-02-02 | 安费诺高速技术(南通)有限公司 | Machining and assembling method of anti-withdrawal connector assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20141216 |
|
| EXPY | Termination of patent right or utility model |