CN1301903A - Self tapping steel bar connector - Google Patents
Self tapping steel bar connector Download PDFInfo
- Publication number
- CN1301903A CN1301903A CN 99127561 CN99127561A CN1301903A CN 1301903 A CN1301903 A CN 1301903A CN 99127561 CN99127561 CN 99127561 CN 99127561 A CN99127561 A CN 99127561A CN 1301903 A CN1301903 A CN 1301903A
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- CN
- China
- Prior art keywords
- steel bar
- internal thread
- self tapping
- bar connector
- tapping steel
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- Reinforcement Elements For Buildings (AREA)
Abstract
Self-tapping reinforcing bar connector includes a kind of main body, the main body has a female screw thread and a screw die structure in its two ends respectively the latter including a cutting taper distributed at end port of the female screw thread and a scraps holding slot distributed around the cutting taper. It can regulate round and cut screw thread in one single stroke to make the connection simple and saving in time.
Description
The present invention relates to a kind of accessory of building unit reinforcement, particularly a kind of self tapping steel bar connector.
In the prior art, people utilize the plain nut connecting reinforcement, realizing the butt joint of two reinforcing bars, but must adopt special implement manage processing such as circle and machining screw in advance to steel bar end, the processing procedure of this undoubtedly reason circle and machining screw is more loaded down with trivial details, not only time-consuming but also effort.
The objective of the invention is to overcome weak point of the prior art, and provide a kind of reinforcing bar butt joint easy, connection procedure saves time, the labour-saving self tapping steel bar connector.
The objective of the invention is to realize by following approach.
Self tapping steel bar connector, comprise a kind of main body with internal thread, its structural feature is: the main body both ends have a kind of bolt die structure respectively, this bolt die structure comprises cutting cone and chip pocket, cutting cone is distributed in the port of internal thread, at least two chip pockets circumferentially distribute along internal thread, and a kind of card structure of pulling is distributed in the main body outer peripheral face.
With bolt die structure cutting steel bar end and form external screw thread, follow-up internal thread also can be repaired thread tooth in addition when external screw thread connects therewith.
Pull card structure in order to switching or block this self tapping steel bar connector, therefore, for this selection of pulling card structure can be various: can be a kind of turret head or four angle head structures that are distributed in the main body outside wall surface, also can be a kind of groove that is distributed in main body outside wall surface or both ends of the surface.
Purpose of the present invention can also realize by following approach.
Chip pocket is preferably even number, and circumferentially uniform along cutting cone.
The vertical side of body of reinforcing bar rib generally is symmetrically distributed two along outer peripheral face, and the chip pocket of this even number symmetrical distribution can allow the chip pocket correspondence contain and eat the vertical side of body of reinforcing bar rib, makes self tapping steel bar connector realize cutting and connection to steel bar end more easily.
The cutting cone cone angle is preferably 12 °～20 °.
The tooth form angle of internal thread profile of tooth is 30 °～55 °.
Bolt die cutting anterior angle is a positive rake angle.
For making the bolt die structure in the self tapping steel bar connector more laborsaving to the screw chasing of steel bar end, can require the cutting cone gradient mild as far as possible usually, the tooth form angle of internal thread profile of tooth is sharp-pointed as far as possible, and allows the cutting anterior angle be positive rake angle.
For making the cutting anterior angle is positive rake angle, can allow the relative cutting cone disalignment of chip pocket side obtain.
The internal thread tooth depth is greater than the vertical side of body of reinforcing bar rib height.
Internal thread has two kinds, and main body one end internal thread is left-handed, and other end internal thread then is dextrorotation.
The tooth form angle of main body internal thread is less than the tooth form angle of cutting cone.
Like this, follow-up internal thread can carry out cold extrusion to the reinforcing bar external screw thread that cutting cone processes to be handled, and not only external screw thread is repaired, and cause the flow harden phenomenon, thus improve case hardness, reduce tooth and survey the gap, reduce surface roughness, improve the bonding strength of connector.
The case hardness of cutting cone and main body internal thread is higher than the hardness of parent material of reinforcement rebar.
Chip pocket runs through the main body inside and outside wall.
Like this, chip pocket can also be for pulling card structure.
In sum, the present invention has following advantage compared to existing technology: reason circle, cut and connect disposable finishing, connection procedure is simple, convenient, save time, and bonding strength is good.
Accompanying drawing 1 is the structural representation front view of embodiment 1 described self tapping steel bar connector.
Accompanying drawing 2 is structural representation left views of embodiment 1 described self tapping steel bar connector.
Accompanying drawing 3 is structural representation front views of the described self tapping steel bar connector of embodiment.
Accompanying drawing 4 is structural representation left views of embodiment 2 described self tapping steel bar connectors.
Accompanying drawing 5 is structural representation left views of the described self tapping steel bar connector of most preferred embodiment.
Below we carry out more detailed description to the present invention in conjunction with the accompanying drawings.
Embodiment 1:
With reference to Fig. 1, self tapping steel bar connector comprises a kind of main body with internal thread, and the main body both ends have a kind of bolt die structure respectively, and this bolt die structure comprises cutting cone 2 and chip pocket 3, and cutting cone 2 is distributed in the port of internal thread, and the cutting cone cone angle is 12 °.
With reference to Fig. 2, chip pocket 3 has three, and is circumferentially uniform along cutting cone 2, and the cutting anterior angle in the chip pocket 3 is a positive rake angle.Tooth form angle in the internal thread tooth form is 50 °.
It is same as the prior art that present embodiment is not stated part.
Embodiment 2:
With reference to Fig. 4, self tapping steel bar connector, cutting cone 2 cone angles are 16 °.Internal thread has two kinds, and main body one end internal thread is left-handed, and other end internal thread then is dextrorotation.The big end awl of expansion awl mouthful internal diameter is a bit larger tham the external diameter of internal thread.
With reference to Fig. 5, chip pocket 3 has two, and is circumferentially uniform along internal thread, and the relative internal thread of the trough rim in the chip pocket 3 axle center translation one offset is so that the cutting anterior angle in the chip pocket is a positive rake angle.Tooth form angle in the internal thread tooth form is 30 °, and tooth depth is greater than reinforcing bar side of body rib height.Tooth form angle in cutting cone 2 tooth forms is 55 °.
It is identical with embodiment 1 that present embodiment is not stated part.
Most preferred embodiment:
With reference to Fig. 3 and Fig. 5 self tapping steel bar connector, chip pocket 3 has four, and is circumferentially uniform along internal thread, and the cutting cone cone angle is 20 °
It is identical with embodiment 2 that present embodiment is not stated part.
Claims (10)
1. self tapping steel bar connector, comprise a kind of main body (1) with internal thread, it is characterized in that, main body (1) both ends have a kind of bolt die structure respectively, this bolt die structure comprises cutting cone (2) and chip pocket (3), cutting cone (2) is distributed in the port of internal thread, and chip pocket (3) circumferentially distributes along cutting cone (2), and a kind of card structure of pulling is distributed in main body (2) outer peripheral face.
2. self tapping steel bar connector according to claim 1 is characterized in that, chip pocket (3) is preferably even number, and circumferentially uniform along cutting cone (2).
3. self tapping steel bar connector according to claim 1 is characterized in that, cutting cone (2) tapering is preferably 12 ° to 20 °.
4. self tapping steel bar connector according to claim 1 is characterized in that, internal thread tooth form angle is 30 °～55 °.
5. self tapping steel bar connector according to claim 1 is characterized in that, the cutting anterior angle in the chip pocket (3) is a positive rake angle.
6. self tapping steel bar connector according to claim 1 is characterized in that, the internal thread tooth depth is greater than the vertical side of body of reinforcing bar rib height.
7. self tapping steel bar connector according to claim 1 is characterized in that, the internal thread tooth has two kinds, and main body (1) one end internal thread is left-handed, and other end internal thread then is dextrorotation.
8. self tapping steel bar connector according to claim 1 is characterized in that, the tooth form angle of main body (1) internal thread is less than the tooth form angle of cutting cone (2).
9. self tapping steel bar connector according to claim 1 is characterized in that, the case hardness of cutting cone (2) and main body (1) internal thread is higher than the hardness of parent material of reinforcement rebar.
10. self tapping steel bar connector according to claim 1 is characterized in that, chip pocket (3) runs through main body (1) inside and outside wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991275616A CN1155760C (en) | 1999-12-30 | 1999-12-30 | Self tapping steel bar connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991275616A CN1155760C (en) | 1999-12-30 | 1999-12-30 | Self tapping steel bar connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1301903A true CN1301903A (en) | 2001-07-04 |
| CN1155760C CN1155760C (en) | 2004-06-30 |
Family
ID=5284917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991275616A Expired - Fee Related CN1155760C (en) | 1999-12-30 | 1999-12-30 | Self tapping steel bar connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1155760C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332410A (en) * | 2011-09-29 | 2012-01-25 | 山东华芯半导体有限公司 | Packaging method and structure of chip |
-
1999
- 1999-12-30 CN CNB991275616A patent/CN1155760C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332410A (en) * | 2011-09-29 | 2012-01-25 | 山东华芯半导体有限公司 | Packaging method and structure of chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1155760C (en) | 2004-06-30 |
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| CF01 | Termination of patent right due to non-payment of annual fee |