CN203548494U - Double-hexagon-bolt-head bolt preventing thread stripping - Google Patents
Double-hexagon-bolt-head bolt preventing thread stripping Download PDFInfo
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- CN203548494U CN203548494U CN201320680537.8U CN201320680537U CN203548494U CN 203548494 U CN203548494 U CN 203548494U CN 201320680537 U CN201320680537 U CN 201320680537U CN 203548494 U CN203548494 U CN 203548494U
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- bolt
- head
- bolt head
- screw
- hex head
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Abstract
The utility model relates to a double-hexagon-bolt-head bolt preventing thread stripping. The bolt comprises a bolt head, a screw rod and a thread screwing portion. The bolt head is formed by welding a first hexagon bolt head and a second hexagon bolt head, the first hexagon bolt head and the screw rod are fixedly connected to the upper end face and the lower end face of the second hexagon bolt head respectively, and the outer diameter of the first hexagon bolt head is smaller than that of the second hexagon bolt head. A guide polished rod is connected at the end, away from the bolt head, of the thread screwing portion, and the size of the guide polished rod is smaller than the inner tolerance diameter of the outer threads of the thread screwing portion. The bolt head of the bolt is formed by welding the first hexagon bolt head and the second hexagon bolt head which differ in outer diameter, and when the bolt is wrenched, the bolt is suitable for wrenches of two specifications, and good applicability is achieved. Meanwhile, the guide polished rod is designed at one end of the thread screwing portion and carries out vertical guidance before the bolt is meshed with a threaded hole, the vertical stress of the bolt is guaranteed, and the probability of the thread stripping is reduced.
Description
Technical field
The utility model relates to fastener areas, particularly a kind of two hex head bolt hook bolts of anti-screw thread stripped thread.
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, therefore bolt connects, be to belong to removably connect.
Application number is that 201320017427.3 Chinese utility model patent discloses a kind of hex head bolt, comprises bolt head and screw rod, and the end face of described bolt head is arc shaped surface, and the screw rod of described bolt head is fixed with annular shell fragment on face.Although this hex head bolt can be by the distortion of annular shell fragment, make two to be connected and between part, to remain certain tension force, guarantee two connective stabilities that are connected between part, but in fastening operating process, thereby the vertical strength that can not guarantee bolt and tapped hole causes oblique loading or operator to lack experience or is firmly excessive, cause fragile tapped hole stripped thread.Due to the general only applicable a kind of specification spanner of outer-hexagonal size of bolt head, when turning, can only adopt a kind of spanner of specification simultaneously, poor for applicability.
Model utility content
The problem existing for prior art, thereby the utility model provides one can make to carry out guide-localization before bolt and hole threaded engagement reduces tapped hole stripped thread probability, two hex head bolt hook bolts of the anti-screw thread stripped thread again can suitable for various size spanner turning.
The utility model for the technological scheme that its technical problem of solution adopts is,
Two hex head bolt hook bolts for anti-screw thread stripped thread, 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; It is characterized in that: described bolt head is welded to form by the first hex head bolt head and the second hex head bolt head, the first hex head bolt head and screw rod are fixedly connected on respectively in the both ends of the surface up and down of described the second hex head bolt head, and the external diameter of the first hex head bolt head is less than the second hex head bolt head; On the upper-end surface of described the first hex head bolt head, be cut with an interior hexagonal; At screw thread, screw portion and be connected with a guiding polished rod away from one end of bolt head, the size of described guiding polished rod is less than screw thread and screws the externally threaded interior tolerance diameter of portion.
Further, one end that described guiding polished rod screws portion away from screw thread is connected with a Hexagon boss, and the bottom surface of Hexagon boss is provided with screw-driver slot.
Further, described screw-driver slot inner concave shape is formed in the bottom surface of described Hexagon boss.
Further, described screw-driver slot is straight groove or cross recess.
Further, at the screw rod of described the second hex head bolt head, be fixed with annular shell fragment 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, two hex head bolt hook bolts of the anti-screw thread stripped thread of the utility model have following advantage:
1, bolt head of the present utility model is welded by the first hex head bolt head and the second hex head bolt head of various outer diameter, when pulling, is suitable for the spanner of two kinds of specifications, and applicability is good.
2, the utility model screws portion at screw thread and designs one section of guiding polished rod that is less than bolt external thread diameter away from one end of bolt head, guiding polished rod carried out vertically-guided before bolt and tapped hole interlock, guarantee the vertically stressed of bolt, reduced the probability of screw thread stripped thread.
3, the utility model is provided with after interior hexagonal in bolt head, even if the distortion of the hex head bolt head of outside still can utilize interior hexagonal to carry out quick-detachment bolt, has increased the working life of bolt.
4, the utility model is by screw rod bottom surface, screw-driver slot being set, and in conjunction with original installing/dismounting portion---head, can realize multiple installation and removal mode simultaneously.
5, 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 by this pair of hex head bolt hook bolt, by two, be connected part when fixing, 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 pair of hex head bolt hook bolt, 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 main TV structure schematic diagram of two hex head bolt hook bolts of the anti-screw thread stripped thread of the utility model.
Fig. 2 is the plan structure schematic diagram of two hex head bolt hook bolts of the anti-screw thread stripped thread of the utility model.
In figure: 1, bolt head, 101, the first hex head bolt head, 102, the second hex head bolt head, 2, screw rod, 3, screw thread screws portion, 4, annular shell fragment, 5, Hexagon boss, 6, interior hexagonal, 7, guiding polished 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.
Two hex head bolt hook bolts of anti-screw thread stripped thread as shown in Figure 1 and Figure 2, 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.
Described bolt head 1 is welded to form by the first hex head bolt head 101 and the second hex head bolt head 102, the first hex head bolt head 101 and screw rod 2 are fixedly connected on respectively in the both ends of the surface up and down of described the second hex head bolt head 102, and the external diameter of the first hex head bolt head 101 is less than the second hex head bolt head 102.Bolt head 1 of the present utility model is welded by the first hex head bolt head 101 and the second hex head bolt head 102 of various outer diameter, when pulling, is suitable for the spanner of two kinds of specifications, and applicability is good.
On the upper-end surface of described the first hex head bolt head 101, be cut with an interior hexagonal 6.Even if the distortion of the hex head bolt head of outside, still can utilize interior hexagonal 6 to carry out quick-detachment bolt, increased the working life of bolt.
At screw thread, screw portion 3 and be provided with guiding polished rod 7 away from one end of bolt head 1, the size of described guiding polished rod 7 is less than screw thread and screws the externally threaded interior tolerance diameter of portion 3.Guiding polished rod 7 carried out vertically-guided before bolt and tapped hole interlock, had guaranteed the vertically stressed of bolt, reduced the probability of screw thread stripped thread.
One end that described guiding polished rod 7 screws portion 3 away from screw thread is connected with a Hexagon boss 5, and the bottom surface of Hexagon boss 5 is provided with screw-driver slot.Described screw-driver slot inner concave shape is formed in the bottom surface of described Hexagon boss 5.Described screw-driver slot is straight groove or cross recess.By in screw rod 2 bottom surfaces, screw-driver slot being set, simultaneously, in conjunction with original installing/dismounting portion---head, can realize multiple installation and removal mode.
At the screw rod 2 of described the second hex head bolt head 102, be fixed with annular shell fragment 4 on face, 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.When the two hex head bolt hook bolts by this anti-screw thread stripped thread are connected part and fix two soon, the annular shell fragment 4 of the screw rod 2 of its second hex head bolt head 102 on face can start to contact a side surface that is connected part, along with further tightening of two hex head bolt hook bolts of this anti-screw thread stripped thread, 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 (5)
1. two hex head bolt hook bolts for anti-screw thread stripped thread, 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 rim screw portion (3); It is characterized in that: described bolt head (1) is welded to form by the first hex head bolt head (101) and the second hex head bolt head (102), the first hex head bolt head (101) and screw rod (2) are fixedly connected on respectively in the both ends of the surface up and down of described the second hex head bolt head (102), and the external diameter of the first hex head bolt head (101) is less than the second hex head bolt head (102); On the upper-end surface of described the first hex head bolt head (101), be cut with an interior hexagonal (6); At screw thread, screw portion (3) and be connected with a guiding polished rod (7) away from one end of bolt head (1), the size of described guiding polished rod (7) is less than screw thread and screws the externally threaded interior tolerance diameter of portion (3).
2. two hex head bolt hook bolts of anti-screw thread stripped thread according to claim 1, it is characterized in that: one end that described guiding polished rod (7) screws portion (3) away from screw thread is connected with a Hexagon boss (5), and the bottom surface of Hexagon boss (5) is provided with screw-driver slot.
3. two hex head bolt hook bolts of anti-screw thread stripped thread according to claim 2, is characterized in that: described screw-driver slot inner concave shape is formed in the bottom surface of described Hexagon boss (5).
4. according to two hex head bolt hook bolts of the anti-screw thread stripped thread described in claim 2 or 3, it is characterized in that: described screw-driver slot is straight groove or cross recess.
5. two hex head bolt hook bolts of anti-screw thread stripped thread according to claim 1, it is characterized in that: the screw rod (2) at described the second hex head bolt head (102) is fixed with annular shell fragment (4) on face, 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 |
|---|---|---|---|
| CN201320680537.8U CN203548494U (en) | 2013-10-30 | 2013-10-30 | Double-hexagon-bolt-head bolt preventing thread stripping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320680537.8U CN203548494U (en) | 2013-10-30 | 2013-10-30 | Double-hexagon-bolt-head bolt preventing thread stripping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203548494U true CN203548494U (en) | 2014-04-16 |
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ID=50466617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320680537.8U Expired - Fee Related CN203548494U (en) | 2013-10-30 | 2013-10-30 | Double-hexagon-bolt-head bolt preventing thread stripping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203548494U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982514A (en) * | 2014-06-05 | 2014-08-13 | 常州市南飞机械有限公司 | Multifunctional combined bolt |
| CN106194953A (en) * | 2016-08-29 | 2016-12-07 | 苏州市顺仪五金有限公司 | A kind of double-threaded screw |
| CN108757685A (en) * | 2018-08-16 | 2018-11-06 | 嘉兴同辉汽配有限公司 | A kind of automotive hub antirust bolt |
-
2013
- 2013-10-30 CN CN201320680537.8U patent/CN203548494U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982514A (en) * | 2014-06-05 | 2014-08-13 | 常州市南飞机械有限公司 | Multifunctional combined bolt |
| CN106194953A (en) * | 2016-08-29 | 2016-12-07 | 苏州市顺仪五金有限公司 | A kind of double-threaded screw |
| CN108757685A (en) * | 2018-08-16 | 2018-11-06 | 嘉兴同辉汽配有限公司 | A kind of automotive hub antirust bolt |
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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: 20140416 Termination date: 20141030 |
|
| EXPY | Termination of patent right or utility model |