CN201187505Y - Primary and secondary bolt made of steel - Google Patents
Primary and secondary bolt made of steel Download PDFInfo
- Publication number
- CN201187505Y CN201187505Y CNU2008201114796U CN200820111479U CN201187505Y CN 201187505 Y CN201187505 Y CN 201187505Y CN U2008201114796 U CNU2008201114796 U CN U2008201114796U CN 200820111479 U CN200820111479 U CN 200820111479U CN 201187505 Y CN201187505 Y CN 201187505Y
- Authority
- CN
- China
- Prior art keywords
- bolt
- screw thread
- steel
- ferrous metal
- thread
- 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 a bolt, particularly a steel male-female bolt which is suitable for being screwed with the internal screw thread of a non-ferrous metal base. The steel male-female bolt comprises an inner bolt and an outer bolt. An outward ring-shaped step is arranged at the upper part of the outer bolt, an external screw thread is arranged outside the outer bolt, a columnar hole is arranged at the central part of the external screw thread, an internal screw thread is arranged on the inner wall of the columnar hole, and the inner bolt is screwed with the internal screw thread; both the inner bolt and the outer bolt are made of steel; and the external screw thread is a coarse screw thread. The steel male-female bolt can effectively prevent the damage of the internal screw thread of the non-ferrous metal base due to the screw-in and screw-out of bolt, so as to prolong the service life of the non-ferrous metal base.
Description
Technical field
The utility model is a kind of bolt, the particularly a kind of steel primary and secondary bolt of screw-in on non-ferrous metal matrix internal thread that be applicable to.
Background technique
Often need to connect some other parts on the non-ferrous metal matrix, in the prior art, the connection of other parts is that the bolt by internal thread on the non-ferrous metal matrix and steel is connected.Because the non-ferrous metal material is softer, bolt then is that iron and steel is made, so screw out through repeatedly screwing in, just is easy to damage the internal thread on the non-ferrous metal matrix, even can cause the discarded of entire equipment.
Summary of the invention
The purpose of this utility model is to damage the defective of non-ferrous metal matrix easily in order to overcome Steel Bolt, invents a kind of steel primary and secondary bolt that can avoid internal thread damage on the non-ferrous metal matrix.
The technical solution of the utility model is achieved like this: described steel primary and secondary bolt, comprise inner bolt and outer bolt, an outside circle step is arranged at the top of outer bolt, the outside of outer bolt is provided with outside thread, the center portion of outer bolt is provided with cylindrical hole, the inwall of cylindrical hole is provided with internal thread, and inner bolt is bolted on the internal thread.
Described inner bolt and outer bolt are steel.
Described outside thread is a coarse thread.
Good effect of the present utility model is as follows: the utility model can effectively be avoided causing the damage of non-ferrous metal matrix internal thread owing to screwing in the back-out bolt, thereby has improved the life time of non-ferrous metal matrix.
Description of drawings
Fig. 1 is the utility model structural drawing
Fig. 2 is the erection drawing of the utility model and non-ferrous metal matrix
Among the figure: 1 inner bolt, 2 outer bolts, 3 steps
4 outside threads, 5 internal threads, 6 non-ferrous metal matrixes
Embodiment
As shown in Figure 1, described steel primary and secondary bolt, comprise inner bolt 1 and outer bolt 2, an outside circle step 3 is arranged at the top of outer bolt 2, the outside of outer bolt 2 is provided with outside thread 4, the center portion of outer bolt 2 is provided with cylindrical hole, and the inwall of cylindrical hole is provided with internal thread 5, and inner bolt 1 is bolted on the internal thread 5.
Described inner bolt 1 and outer bolt 2 are steel.
Described outside thread 5 is a coarse thread.
When concrete the use, in the screw on the outer bolt 2 screw-in non-ferrous metal matrixes 6, the upper end of screw is provided with the groove that is complementary with step 3, after tightening outer bolt 2, step 3 falls in the groove just, at this moment the upper-end surface of outer bolt 2 is equal with the outer surface of non-ferrous metal matrix 6, can be pressed in the upper-end surface of the outer surface and the outer bolt 2 of non-ferrous metal matrix 6 simultaneously to guarantee connected object.Because the upper-end surface of outer bolt 2 is being pressed by connected object, the step 3 of outer bolt 2 is supported by non-ferrous metal matrix 6, make bolt 2 being clipped between non-ferrous metal matrix 6 and the connected object and being unable to stir any more tightly, so when screwing in back-out inner bolt 1, outer bolt 2 relative non-ferrous metal matrixes 6 will remain static, thereby face avoids the internal thread of non-ferrous metal matrix 6 owing to friction damages.
Claims (3)
1. steel primary and secondary bolt, it is characterized in that: described steel primary and secondary bolt, comprise inner bolt and outer bolt, an outside circle step is arranged at the top of outer bolt, the outside of outer bolt is provided with outside thread, the center portion of outer bolt is provided with cylindrical hole, and the inwall of cylindrical hole is provided with internal thread, and inner bolt is bolted on the internal thread.
2. steel primary and secondary bolt according to claim 1 is characterized in that: described inner bolt (1) and outer bolt (2) are steel.
3. steel primary and secondary bolt according to claim 1 is characterized in that: described outside thread is a coarse thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201114796U CN201187505Y (en) | 2008-04-22 | 2008-04-22 | Primary and secondary bolt made of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201114796U CN201187505Y (en) | 2008-04-22 | 2008-04-22 | Primary and secondary bolt made of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201187505Y true CN201187505Y (en) | 2009-01-28 |
Family
ID=40310526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201114796U Expired - Fee Related CN201187505Y (en) | 2008-04-22 | 2008-04-22 | Primary and secondary bolt made of steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201187505Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091661A (en) * | 2014-06-12 | 2014-10-08 | 宜兴华源电工设备有限公司 | Dual lightning protection and explosion-proof composite post type insulator |
| CN107420410A (en) * | 2017-07-29 | 2017-12-01 | 马鞍山市金潮橡胶技术研发科技有限公司 | A kind of tubaeform anti-loosening bolt |
-
2008
- 2008-04-22 CN CNU2008201114796U patent/CN201187505Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091661A (en) * | 2014-06-12 | 2014-10-08 | 宜兴华源电工设备有限公司 | Dual lightning protection and explosion-proof composite post type insulator |
| CN107420410A (en) * | 2017-07-29 | 2017-12-01 | 马鞍山市金潮橡胶技术研发科技有限公司 | A kind of tubaeform anti-loosening bolt |
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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: 20090128 Termination date: 20110422 |