CN202971501U - Fastener - Google Patents
Fastener Download PDFInfo
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- CN202971501U CN202971501U CN 201220659561 CN201220659561U CN202971501U CN 202971501 U CN202971501 U CN 202971501U CN 201220659561 CN201220659561 CN 201220659561 CN 201220659561 U CN201220659561 U CN 201220659561U CN 202971501 U CN202971501 U CN 202971501U
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- fastening piece
- transition arc
- screw
- bolt
- transition
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Abstract
The utility model relates to a fastener, in particular to a high-strength engineering plastic fastener suitable for being used under the condition of strong corrosion. The engineering plastic fastener comprises a bolt, a screw cap and a gasket, wherein the bolt is adapted with the screw cap; the bolt is adapted with the gasket; the bolt comprises a bolt head and a screw; and a circular truncated cone is arranged at the transitional part between the bolt head and the screw of the bolt. According to the fastener disclosed by the utility model, the better stress can be achieved, and stress concentration is avoided.
Description
Technical field
The utility model relates to a kind of fastening piece, specifically relates in particular to the high-strength engineering plastic fastening piece that uses under a kind of suitable deep-etching condition.
Background technique
The prior art situation, the defective of prior art or deficiency: under the deep-etching condition, the fastening piece, the especially bolt that adopt now adopt nickel-chromium stainless steel (304) manufacturing basically.The stainless steel bolt Main Problems is intensity low (4.8 grades), can only resist the corrosion of low density oxyacid and organic solvent, and not anti-concentrated acid and organic acid corrosion more can not be resisted the corrosion of hydracid and halate.Its use is subject to great limitation.
After nickel-the chromium stainless steel bolt is corroded, chromium element oxide befouling environment, the occasion that contacts with product, chromated oxide enters product, particularly medicine, foodstuff product, very harmful, consequence is serious.
The stainless steel bolt rust is after death dismantled difficulty, and the replacement cycle is long, has a strong impact on production.
Usually, the defective that fastening piece has stress to concentrate needs a kind of solution problem of stress concentration, stressed uniform fastening piece.
This reality has novel proposition to make bolt with the nonmetallic material (engineering plastics) of corrosion-resistant, high strength, nonhazardous, and product is used for the inefficient occasion of stainless steel material, and important realistic meaning is arranged.
The model utility content
Goal of the invention of the present utility model is: the problem for prior art exists provides a kind of fastening piece.Can solve fastening piece discontinuity, the concentrated technical problem of stress.Be raw material owing to having adopted engineering plastics, corrosion resistance is good, and intensity is high.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of fastening piece comprises bolt, nut and pad, and bolt and nut are adaptive, and bolt and pad are adaptive, and bolt comprises bolt head and screw rod, and the bolt head of bolt and screw rod transition position are provided with round platform.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
External thread of screw and nut internal thread are adaptive, and the thread tip of external thread of screw and tooth root are provided with first and cross circular arc, and thread tip and the tooth root of nut internal thread spiral shell are provided with the second transition arc, and screw diameter is 8～64mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
The thread tip of external thread of screw and the First Transition circular arc of tooth root are 1:0.1～1:0.2 with the ratio of external thread of screw tooth distance.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
The second transition arc of nut internal thread spiral shell thread tip and tooth root is 1:0.1～1:0.2 with the ratio of nut internal thread tooth distance.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
Bolt head and nut profile are positive hexagon, and six seamed edges are provided with transition arc, and the radius of described six seamed edge transition arcs is 1mm; Be provided with transition arc between end face and cylinder, the radius of described end face and cylinder transition arc is 1.5mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
The round platform diameter is screw rod nominal diameter DN+1mm; Frustum cone height is screw rod nominal diameter DN+2mm; Be provided with transition arc between round platform and screw head, the radius of described round platform and screw head transition arc is 1mm, is provided with transition arc between round platform and screw rod, and the radius of described round platform and screw rod transition arc is 0.5mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
Spacer thickness is 1.5mm; Pad is provided with taper hole, and the taper hole aperture is screw rod nominal diameter DN+1mm; The nut aperture is screw rod nominal diameter DN+2.5mm; Taper hole internal diameter angle of circumference is provided with transition arc, and the radius of described angle of circumference transition arc is 0.1mm; Pad two sides cylindrical is provided with transition arc, and the radius of described cylindrical transition arc is 0.5mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
The material of described fastening piece is engineering plastics.
Adopting engineering plastics is raw-material fastening piece, and corrosion resistance is good, and intensity is high.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1, fastening piece is stressed evenly, has solved the problem that stress is concentrated.
2, the fastening piece corrosion resistance is good, and intensity is high.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is structural representation of the present utility model.
Fig. 4 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Embodiment 1
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the utility model product adopts glass fibre or carbon fiber to strengthen polyphenylene sulfide-polytetrafluoroethyl-ne sigh (PPS/PTFE) alloy material, by molded bolt (nut, pad) complete sets of products.For guaranteeing that product reaches general effect, carry out structural design by 8.8 grade high-strength carbon steel bolt standard GB/T 5782.Physical difference in view of engineering plastics material and metal material existence, and processing method is fully different, the utility model is different from GB/T 5782, a kind of engineering plastics fastening piece is characterized in that, comprises bolt 1, nut 2 and pad 3, bolt and nut are adaptive, bolt and pad are adaptive, and bolt comprises bolt head 4 and screw rod 5, and the bolt head of bolt and screw rod transition position are provided with round platform 6.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
As preferred version of the present utility model, external thread of screw and nut internal thread are adaptive, thread tip and the tooth root of external thread of screw are provided with First Transition circular arc 7, and the thread tip of nut internal thread spiral shell and tooth root are provided with the second transition arc 8, and screw diameter is 8～64mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
As preferred version of the present utility model, the First Transition circular arc of external thread of screw thread tip and tooth root increases with screw diameter, and the second transition arc of nut internal thread spiral shell thread tip and tooth root increases with screw diameter.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
As preferred version of the present utility model, the thread tip of external thread of screw and the transition arc of tooth root are 1:0.1～1:0.2 with the ratio of external thread of screw tooth distance.
As preferred version of the present utility model, the transition arc of nut internal thread spiral shell thread tip and tooth root is 1:0.1～1:0.2 with the ratio of nut internal thread tooth distance.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
As preferred version of the present utility model, bolt head and nut profile are positive hexagon, and six seamed edges are transition arc, and the radius of six seamed edge transition arcs 9 is 1mm; End face and cylinder are transition arc, and the radius of described end face and cylinder transition arc 10 is 1.5mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
As preferred version of the present utility model, the round platform diameter is screw rod nominal diameter DN+1mm; Frustum cone height is screw rod nominal diameter DN+2mm; Round platform and screw head are transition arc, and the radius of described round platform and screw head transition arc 11 is 1mm, and round platform and screw rod are transition arc, and the radius of described round platform and screw rod transition arc 12 is 0.5mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
As preferred version of the present utility model, spacer thickness is 1.5mm; Pad is provided with taper hole, and the taper hole aperture is screw rod nominal diameter DN+1mm; The nut aperture is screw rod nominal diameter DN+2.5mm; Taper hole internal diameter angle of circumference is arc transition, and the radius of described angle of circumference transition arc 13 is 0.1mm; Pad two sides cylindrical is arc transition, and the radius of described cylindrical transition arc 14 is 0.5mm.
Fastening piece with above-mentioned feature, stressed better, avoid the stress concentration phenomenon.
The raw material of described fastening piece are engineering plastics.
Adopting engineering plastics is raw-material fastening piece, and corrosion resistance is good, and intensity is high.
This structural design of the utility model product has been eliminated the internal stress of the molded generation of material greatly, makes material have higher tensile breaking strength and rigidity.The practical intensity of product improves two orders of magnitude than nickel-chromium stainless steel, can reach 8.8 grades.The planted agent reduces simultaneously, and the corrosion resistance of material is further enhanced.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a fastening piece, is characterized in that, comprises bolt, nut and pad, and bolt and nut are adaptive, and bolt and pad are adaptive, and bolt comprises bolt head and screw rod, and the bolt head of bolt and screw rod transition position are provided with round platform.
2. fastening piece according to claim 1, it is characterized in that, external thread of screw and nut internal thread are adaptive, and the thread tip of external thread of screw and tooth root are provided with first and cross circular arc, thread tip and the tooth root of nut internal thread spiral shell are provided with the second transition arc, and screw diameter is 8～64mm.
3. fastening piece according to claim 1, is characterized in that, the thread tip of external thread of screw and the First Transition circular arc of tooth root are 1:0.1～1:0.2 with the ratio of external thread of screw tooth distance.
4. fastening piece according to claim 1, is characterized in that, the second transition arc of nut internal thread spiral shell thread tip and tooth root is 1:0.1～1:0.2 with the ratio of nut internal thread tooth distance.
5. fastening piece according to claim 1, is characterized in that, bolt head and nut profile are positive hexagon, and six seamed edges are provided with transition arc, and the radius of described six seamed edge transition arcs is 1mm; Be provided with transition arc between end face and cylinder, the radius of described end face and cylinder transition arc is 1.5mm.
6. fastening piece according to claim 1, is characterized in that, the round platform diameter is screw rod nominal diameter DN+1mm; Frustum cone height is screw rod nominal diameter DN+2mm; Be provided with transition arc between round platform and screw head, the radius of described round platform and screw head transition arc is 1mm, is provided with transition arc between round platform and screw rod, and the radius of described round platform and screw rod transition arc is 0.5mm.
7. fastening piece according to claim 1, is characterized in that, spacer thickness is 1.5mm; Pad is provided with taper hole, and the taper hole aperture is screw rod nominal diameter DN+1mm; The nut aperture is screw rod nominal diameter DN+2.5mm; Taper hole internal diameter angle of circumference is provided with transition arc, and the radius of described angle of circumference transition arc is 0.1mm; Pad two sides cylindrical is provided with transition arc, and the radius of described cylindrical transition arc is 0.5mm.
8. the described fastening piece of according to claim 1 to 7 any one, is characterized in that, the material of described fastening piece is engineering plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220659561 CN202971501U (en) | 2012-12-05 | 2012-12-05 | Fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220659561 CN202971501U (en) | 2012-12-05 | 2012-12-05 | Fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971501U true CN202971501U (en) | 2013-06-05 |
Family
ID=48512584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220659561 Expired - Fee Related CN202971501U (en) | 2012-12-05 | 2012-12-05 | Fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971501U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939446A (en) * | 2014-05-15 | 2014-07-23 | 湖北金力工程复合材料有限公司 | Toughening FRP spiral connecting piece and manufacturing method thereof |
| CN104009703A (en) * | 2014-06-18 | 2014-08-27 | 湖北金力工程复合材料有限公司 | Photovoltaic solar combination-type support based on toughened FRP screwed connecting pieces |
| CN106840500A (en) * | 2017-01-22 | 2017-06-13 | 中国工程物理研究院化工材料研究所 | The method of quick detection fastener elasticity |
-
2012
- 2012-12-05 CN CN 201220659561 patent/CN202971501U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939446A (en) * | 2014-05-15 | 2014-07-23 | 湖北金力工程复合材料有限公司 | Toughening FRP spiral connecting piece and manufacturing method thereof |
| CN104009703A (en) * | 2014-06-18 | 2014-08-27 | 湖北金力工程复合材料有限公司 | Photovoltaic solar combination-type support based on toughened FRP screwed connecting pieces |
| CN106840500A (en) * | 2017-01-22 | 2017-06-13 | 中国工程物理研究院化工材料研究所 | The method of quick detection fastener elasticity |
| CN106840500B (en) * | 2017-01-22 | 2019-07-19 | 中国工程物理研究院化工材料研究所 | The quickly method of detection fastener elasticity |
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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: 20130605 Termination date: 20141205 |
|
| EXPY | Termination of patent right or utility model |