CN201884411U - D-shaped bolt - Google Patents
D-shaped bolt Download PDFInfo
- Publication number
- CN201884411U CN201884411U CN2010206750225U CN201020675022U CN201884411U CN 201884411 U CN201884411 U CN 201884411U CN 2010206750225 U CN2010206750225 U CN 2010206750225U CN 201020675022 U CN201020675022 U CN 201020675022U CN 201884411 U CN201884411 U CN 201884411U
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- CN
- China
- Prior art keywords
- bolt
- flat
- sawn
- bolt head
- cylinder
- 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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- 239000012141 concentrate Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Connection Of Plates (AREA)
Abstract
The utility model relates to a bolt, in particular to a D-shaped bolt. The D-shaped bolt comprises a bolt head and a threaded rod, wherein the threaded rod is provided with a thread. The D-shaped bolt is characterized in that the bolt head is in a flat-sawn cylinder shape; the flat-sawn cylinder is concentric with the threaded rod; the flat-sawn face of the flat-sawn cylinder is parallel and level with the side face of the threaded rod. The bolt head of the bolt is in the flat-sawn cylinder shape; one side of the flat-sawn cylinder is flat and other parts of the flat-sawn cylinder are round, i.e. the appearance looks like a D letter, therefore, the bolt is called D-shaped bolt; when the bolt head is twisted by a spanner, the flat side of the bolt head receives a smaller moment, and the opposite side receives a big moment so that external moments can be centralized for use, thus, the bolt can be comparatively easy to twist, and moreover, edges and corners on the bolt head cannot be abraded.
Description
Technical field
The utility model is a kind of bolt, particularly a kind of D type bolt.
Background technique
Bolt is made up of bolt head and screw rod, has outside thread on the screw rod, needs to cooperate with nut, is used to be fastenedly connected two parts that have through hole, and this Connecting format claims bolt to connect.The bolt head of bolt has hexagon head, round end, square spigot or the like.No matter hexagon head round end square spigot, their shape all are symmetrical, when twisting the bolt head with spanner, the suffered moment in bolt head both sides equates, this moment when tightening or turn on bolt by average being applied on the bolt head.When bolt connects tighter as gets rusty, the average use of moment of face will be difficult to turn bolt, but also easily the corner angle on the bolt head be polished, and cause the bolt of not opening.
Summary of the invention
The purpose of this utility model is to be difficult to open the bolt head defective of wearing and tearing easily in order to overcome existing symmetric form bolt, and inventing a kind of bolt head is asymmetric D type bolt.
The purpose of this utility model realizes as follows: described D type bolt, comprise bolt head and screw rod, and screw rod is provided with screw thread, it is characterized in that: the bolt head is that flat-cut is cylindric, and this flat-cut cylinder is concentric with screw rod, and bastard face is mutually concordant with the side of screw rod.
Good effect of the present utility model is as follows: the bolt head of this bolt is that flat-cut is cylindric, one side of flat-cut cylinder is flat, remaining part is round, and outward appearance resembles a D word, so be D type bolt, when twisting the bolt head with spanner, the moment that a flat side is subjected on the bolt head is little, and the moment that a side on opposite is subjected to is big, makes moment of face can concentrate use, so just can be than being easier to turn bolt, and the corner angle on the bolt head can not polished yet.
Description of drawings
Fig. 1 is the utility model structural drawing.
Among the figure: bolt head 1, screw rod 2, screw thread 3.
Embodiment
As shown in Figure 1, described D type bolt comprises bolt head 1 and screw rod 2, and screw rod 2 is provided with screw thread 3, it is characterized in that: bolt head 1 is cylindric for flat-cut, and this flat-cut cylinder is concentric with screw rod 2, and bastard face is mutually concordant with the side of screw rod 2.
The bolt head of this bolt is that flat-cut is cylindric, one side of flat-cut cylinder is flat, remaining part is round, and outward appearance resembles a D word, so be D type bolt, when twisting the bolt head with spanner, the moment that a flat side is subjected on the bolt head is little, and the moment that a side on opposite is subjected to is big, makes moment of face can concentrate use, so just can be than being easier to turn bolt, and the corner angle on the bolt head can not polished yet.
Claims (1)
1. a D type bolt comprises bolt head and screw rod, and screw rod is provided with screw thread, it is characterized in that: the bolt head is that flat-cut is cylindric, and this flat-cut cylinder is concentric with screw rod, and bastard face is mutually concordant with the side of screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206750225U CN201884411U (en) | 2010-12-23 | 2010-12-23 | D-shaped bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206750225U CN201884411U (en) | 2010-12-23 | 2010-12-23 | D-shaped bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884411U true CN201884411U (en) | 2011-06-29 |
Family
ID=44181951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206750225U Expired - Fee Related CN201884411U (en) | 2010-12-23 | 2010-12-23 | D-shaped bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884411U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014173360A1 (en) * | 2013-08-28 | 2014-10-30 | 中兴通讯股份有限公司 | Anti-theft screw and wrench |
| USD1093137S1 (en) | 2024-02-12 | 2025-09-16 | Terrasmart, Inc. | Fastener |
-
2010
- 2010-12-23 CN CN2010206750225U patent/CN201884411U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014173360A1 (en) * | 2013-08-28 | 2014-10-30 | 中兴通讯股份有限公司 | Anti-theft screw and wrench |
| USD1093137S1 (en) | 2024-02-12 | 2025-09-16 | Terrasmart, Inc. | Fastener |
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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: 20110629 Termination date: 20111223 |