CN207297576U - A kind of rolling tooth bolt of improvement - Google Patents
A kind of rolling tooth bolt of improvement Download PDFInfo
- Publication number
- CN207297576U CN207297576U CN201721210154.9U CN201721210154U CN207297576U CN 207297576 U CN207297576 U CN 207297576U CN 201721210154 U CN201721210154 U CN 201721210154U CN 207297576 U CN207297576 U CN 207297576U
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- China
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- teeth
- tooth
- bolt
- bar portion
- improvement
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Abstract
The utility model provides a kind of rolling tooth bolt of improvement, belongs to field of mechanical technique, it solves the problems, such as that existing bolt strength is low.The rolling tooth bolt of this improvement includes：Head；Screw rod, it is installed in head center, screw rod is made of the bar portion set gradually and tooth portion, and head, bar portion and tooth portion three are connected as a single entity setting, bar portion is connected by the conical surface with tooth portion, and a row teeth are offered in tooth portion, and the teeth close to bar portion are the first teeth, the distance of the end of first teeth to the conical surface is h, and h=1mm.The utility model has the characteristics that intensity is high.
Description
Technical field
The utility model belongs to field of mechanical technique, the particularly a kind of rolling tooth bolt of improvement, a kind of high intensity, high tensile
Improvement rolling tooth bolt.
Background technology
Bolt cold-heading molding first in shaping, forms bolt blank structure, subsequently by undergauge, Beam End, the work for rolling over tooth
Final molding bolt finished product after skill.Wherein roll over tooth and be called threading in daily life, it is to fix one piece of dental lamina to roll over tooth, separately
One piece of movable teeth strip movable property product movement, produces product using extruding and is plastically deformed screw thread.Can by rolling over tooth technique
Molded semi-finished product are rolled over into system or tapping to reach required screw thread.
12.9 current grade bolts roll over tooth when rolling over tooth, by traditional handicraft easily makes tooth and bar portion（Full tooth chamfering）Place occurs
Fracture, tensile strength is unqualified, and finished product rate is low, and is unfavorable for the progress of assembly work even to the production work after installation
Impact.With present technology constantly bring forth new ideas and requirement to bolt quality is continuously improved, using traditional handicraft
12.9 grade bolts of production can not meet the market demand higher and higher to quality requirement.
In conclusion to solve the deficiency in existing bolt arrangement intensity, the utility model devises a kind of design and closes
The rolling tooth bolt of the high improvement of reason, intensity.
The content of the invention
The utility model is existing in the prior art to solve the problems, such as, there is provided the improvement that a kind of design is reasonable, intensity is high
Roll over tooth bolt.
The purpose of this utility model can be achieved through the following technical solutions：A kind of rolling tooth bolt of improvement, including：
Head；
Screw rod, is installed in head center, and the screw rod is made of the bar portion set gradually and tooth portion, and head, bar portion with
And tooth portion three is connected as a single entity setting, the bar portion is connected by the conical surface with tooth portion, and a row teeth are offered in tooth portion, close
The teeth of bar portion are the first teeth, and the distance of end to the conical surface of the first teeth is h, and h=1mm.
Further as this case is improved, and escape is offered between tooth portion and the conical surface, the first teeth extend to withdrawing
Groove is interior and the width of escape is more than h.
Another step as this case is improved, the first teeth arc transition to adjacent teeth.
Compared with prior art, the structure design of the utility model is reasonable, sets and rolles over the first teeth and bolt caused by tooth
The distance between bar portion is 1mm, reduce bar portion there is the risk being broken, improve the tensile strength of bolt, in addition, the first teeth with
Between adjacent teeth circular arc set, can further avoid roll over tooth or installation when bar portion fracture situation occur, bolt into
Quality is good, intensity is high.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is the part enlarged structure schematic diagram of Fig. 1.
In figure, 11, head；12nd, bar portion；13rd, tooth portion；131st, the first teeth；132nd, teeth；14th, escape；15th, the conical surface.
Embodiment
With reference to embodiment and attached drawing, the technical solution of the utility model is further elaborated.
As depicted in figs. 1 and 2, the rolling tooth bolt of this improvement includes：
Head 11；
Screw rod, is installed in the center of head 11, screw rod is made of the bar portion 12 set gradually and tooth portion 13, and head 11, bar
Portion 12 and 13 three of tooth portion are connected as a single entity setting, and bar portion 12 is connected with tooth portion 13 by the conical surface 15, is offered in tooth portion 13
One row teeth 132, the teeth 132 close to bar portion 12 are the first teeth 131, the distance of the end of the first teeth 131 to the conical surface 15
For h, and h=1mm.
Since existing 12.9 grade bolt is when rolling over tooth, rolling over tooth using traditional handicraft easily makes tooth and bar portion（Full tooth chamfering）
Place is broken, and tensile strength is unqualified, and finished product rate is low, and is unfavorable for the progress of assembly work even to the life after installation
Production work impacts, and as the requirement to bolt quality is continuously improved, existing 12.9 grade bolt can not meet market
Demand.
For this reason, the utility model devises a kind of rolling tooth bolt of improvement, work improvement during by rolling over tooth, formation meets
Production and the bolt of installation requirement, are not in showing for fracture at teeth 132 and full tooth chamfering on the rolling tooth bolt of this improvement
As, and tensile strength is good, product quality is substantially guaranteed.
Specifically, the rolling tooth bolt of this improvement is formed by head 11, bar portion 12 and 13 integral molding of tooth portion successively, lead to
Cross and tooth portion 13 is carried out rolling over tooth work and then is molded bolt finished product, there are a row teeth 132 in the tooth portion 13 of bolt finished product, it is actual
Teeth 132 surround 13 circumferential lateral surface of tooth portion and are spirally distributed.
First teeth 131 are a teeth 132 in tooth portion 13 near bar portion 12, namely first when rolling over tooth roll over into
The teeth 132 of type, preferably bar portion 12 transits to tooth portion 13 by the conical surface 15 in the present embodiment, at the same set the first teeth 131 with
The conical surface 15 the distance between be h=1mm, h herein actually refers to the ends of the first teeth 131 to the conical surface 15 and tooth portion 13
The distance of junction, the end of the first teeth 131 are to refer to the position that the first teeth 131 start.
The setting of the conical surface 15 is actually that 12 chamfering of bar portion to tooth portion 13 is formed, 131 end of the first teeth and the conical surface
The setting of 15 distance 1mm, can reduce bar portion 12 and the risk being broken occur, and improve bolt tensile strength, so improve bolt into
The quality of product.
Preferably, escape 14 is offered between tooth portion 13 and the conical surface 15, the first teeth 131 are extended in escape 14
And the width of escape 14 is more than h.
It is noted that offering escape 14 between the conical surface 15 and tooth portion 13, the setting of escape 14 rolling over
During tooth, tooth instrument is rolled over（Dental lamina etc.）Bolt can conveniently be departed from, avoid that bolt surface is caused to damage.
Wherein the first teeth 131 are extended partially into escape 14, namely the end of the first teeth 131 is located at escape 14
Position, therefore the width of escape 14 is more than h（The distance between first teeth, 131 end and the conical surface 15）.
Further, 131 arc transition of the first teeth is to adjacent teeth 132.To further reduce bolt shank 12
The risk of fracture, 131 arc transition of preferably the first teeth is to adjacent teeth 132 in the present embodiment, i.e., the first teeth 131 are with R
Angle transits to adjacent teeth 132, reduces the damage of bolt, improves the tensile strength and service life of bolt.
The rolling tooth bolt of this improvement is reasonable in design, sets and rolles over the first teeth 131 and bolt shank 12 caused by tooth
The distance between be 1mm, reduce bar portion 12 there is the risk being broken, the tensile strength of bolt is improved, in addition, the first teeth 131
Circular arc is set between adjacent teeth 132, can further avoid the situation that bar portion 12 is broken when rolling over tooth or installation from occurring,
Bolt quality of finished product good, intensity are high.
Described herein is only the preferred embodiment of the utility model, but the scope of protection of the utility model is not
It is confined to this.Modification that the utility model those skilled in the art carries out described specific embodiment or supplement are adopted
Replaced, should all be covered by within the scope of protection of the utility model with similar mode.
Claims (3)
- A kind of 1. rolling tooth bolt of improvement, it is characterised in that including：Head；Screw rod, is installed in head center, the screw rod is made of the bar portion set gradually and tooth portion, and head, bar portion and tooth Portion three is connected as a single entity setting, and the bar portion is connected by the conical surface with tooth portion, and a row teeth are offered in tooth portion, close to bar portion Teeth be the first teeth, the distance of end to the conical surface of the first teeth is h, and h=1mm.
- 2. the rolling tooth bolt of a kind of improvement according to claim 1, it is characterised in that offered between tooth portion and the conical surface Escape, the first teeth extend in escape and the width of escape is more than h.
- A kind of 3. rolling tooth bolt of improvement according to claim 1 or 2, it is characterised in that the first teeth circular arc mistake Cross to adjacent teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721210154.9U CN207297576U (en) | 2017-09-19 | 2017-09-19 | A kind of rolling tooth bolt of improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721210154.9U CN207297576U (en) | 2017-09-19 | 2017-09-19 | A kind of rolling tooth bolt of improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207297576U true CN207297576U (en) | 2018-05-01 |
Family
ID=62443040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721210154.9U Active CN207297576U (en) | 2017-09-19 | 2017-09-19 | A kind of rolling tooth bolt of improvement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207297576U (en) |
-
2017
- 2017-09-19 CN CN201721210154.9U patent/CN207297576U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |