CN214146184U - Large-pitch long screw - Google Patents
Large-pitch long screw Download PDFInfo
- Publication number
- CN214146184U CN214146184U CN202023027112.6U CN202023027112U CN214146184U CN 214146184 U CN214146184 U CN 214146184U CN 202023027112 U CN202023027112 U CN 202023027112U CN 214146184 U CN214146184 U CN 214146184U
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- thread
- screw
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- threaded
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- 238000005520 cutting process Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000004033 plastic Substances 0.000 abstract description 6
- 229920003023 plastic Polymers 0.000 abstract description 6
- 239000002023 wood Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 239000011295 pitch Substances 0.000 description 26
- 239000011265 semifinished product Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000005246 galvanizing Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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Abstract
The utility model discloses a large-pitch long screw, which comprises a screw main body; a threaded segment; a screw head; the threaded section is positioned at one end of the screw main body, and the screw head is positioned at one end of the screw main body far away from the threaded section; the large-pitch long screw is suitable for soft plastics or wood and can realize quick fastening and excellent loosening function by large pitch; the triangular prism-shaped screw body and the triangular first thread section can further reduce screwing resistance, reduce the torque requirement on screwing equipment, and simultaneously the first thread section in the shape can well avoid the problem of plastic or wood breakage in the screwing process.
Description
Technical Field
The utility model belongs to the technical field of threaded fastener, specifically speaking relate to a coarse pitch long screw.
Background
Threaded fasteners have found extremely wide application in a variety of products. In recent years, with the high development of scientific technology and the opening of external policies, special fasteners introduced from foreign countries and used on products and equipment in China have been increasing. In particular, with the large number of applications of automatic screws, a large-pitch thread forming screw is also beginning to be widely used. The national standard or ministerial standard of the large-pitch self-tapping screw is not made in China, only a few manufacturers are in trial production, and the screws used in China are imported mostly. Foreign large-pitch thread-forming screws have been used in aviation, machinery, electrical appliances and other products, and it is predicted that domestic large-pitch thread-forming screws will be used on a large scale.
Disclosure of Invention
The utility model aims at providing a coarse pitch long screw, it is anticipated to solve the technical problem in the background art.
In order to solve the technical problem, the purpose of the utility model is to realize like this:
a large pitch long screw comprises
A screw body; a threaded segment; a screw head; the threaded section is positioned at one end of the screw main body, and the screw head is positioned at one end of the screw main body far away from the threaded section; the thread section comprises a thread core part and a thread part, the thread part is arranged on the outer peripheral surface of the thread core part, and the cross section outer contour of the thread part is triangular.
On the basis of the above scheme and as a preferable scheme of the scheme: the thread segments include a first thread segment and a second thread segment, and the thread pitch of the second thread segment is smaller than the thread pitch of the first thread segment.
On the basis of the above scheme and as a preferable scheme of the scheme: the thread pitch of the first thread segments is not less than twice the thread pitch of the second thread segments.
On the basis of the above scheme and as a preferable scheme of the scheme: the second thread section is provided with a cutting edge and a chip groove.
On the basis of the above scheme and as a preferable scheme of the scheme: the second thread segments are tapered.
Compared with the prior art, the utility model outstanding and profitable technological effect is: the large-pitch long screw is suitable for soft plastics or wood, and can realize quick fastening and excellent loosening function at large pitch; the triangular prism-shaped screw body and the triangular first thread section can further reduce screwing resistance and reduce the torque requirement on screwing equipment, and meanwhile, the first thread section in the shape can well avoid the problem of plastic or wood breakage in the screwing process; the second thread section is provided with a cutting edge and a chip groove and is conical in shape, so that self-tapping positioning can be better realized, and the large-pitch long screw can be screwed in more favorably; in addition, the thread pitches of the first thread section and the second thread section are different, and the anti-loosening capacity of the anti-loosening device is further improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the first embodiment;
FIG. 2 is a very schematic cross-sectional view of a threaded segment;
FIG. 3 is a schematic cross-sectional structure of a semi-finished product;
FIG. 4 is a schematic view of the overall structure of the second embodiment;
fig. 5 is a schematic view of the second thread segment configuration.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step, based on the given embodiments, fall within the scope of protection of the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
In the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
Example one
Referring to fig. 1-3, a large pitch long screw 1 includes
A screw main body 11; a threaded segment 12; a screw head 13; the threaded section 12 is located at one end of the screw body 11, and the screw head 13 is located at one end of the screw body 11 far away from the threaded section 12; the threaded section 12 includes a threaded core 121 and a threaded portion 122, the threaded portion 122 is disposed on an outer circumferential surface of the threaded core 121, and a cross-sectional outer profile of the threaded portion 122 is triangular.
The large-pitch long screw is suitable for soft plastics or wood, and can realize quick fastening and excellent loosening function at large pitch; the triangular prism-shaped screw body and the triangular first thread section can further reduce screwing resistance, reduce the torque requirement on screwing equipment, and simultaneously the first thread section in the shape can well avoid the problem of plastic or wood breakage in the screwing process.
Example two
Referring to fig. 4 to 5, in the first embodiment, the threaded section 12 includes a first threaded portion 121 and a second threaded portion 122, and the thread pitch of the second threaded portion 122 is smaller than that of the first threaded portion 121. It is further preferable that the pitch of the first thread part 121 is not less than twice the pitch of the second thread part 122. The second threaded portion 122 is provided with a cutting edge 1221 and a chip groove 1222.
In a further preferred embodiment of the present invention, the second thread segments 122 are tapered.
The second thread section 122 is provided with a cutting edge 1221 and a chip groove 1222, and is tapered in shape, so that self-tapping positioning can be better realized, and the large-pitch long screw can be screwed in more conveniently; in addition, the thread pitches of the first thread section 121 and the second thread section 122 are different, so that the anti-loosening capability of the screw is further improved, and the assembly body fastened by the screw is stable and durable.
In addition, the embodiment also discloses a production process of the large-pitch long screw, which comprises the following steps
S1: preparing a blank;
s2: stretching the blank to a set size;
s3: using a cold heading female die to carry out primary cold heading on the blank, and upsetting and extruding the blank into three parts through the cold heading female die
Prismatic shape;
s4: heading, heading the triangular blank subjected to the secondary cold heading;
s5: carrying out third cold heading on the triangular blank by using a cold heading female die, and carrying out third cold heading on the triangular blank by using the cold heading female die
Upsetting and extruding the head of the blank into a cone to form a semi-finished product;
s6: clamping the semi-finished product by using a tail clamping machine to form a cutting edge and a chip groove;
s7: and (4) twisting the semi-finished product subjected to tail clamping processing in the step S6 into the triangular threads (including the first step)
A threaded segment and a second threaded segment);
s8: performing heat treatment, namely annealing and tempering the processed screw;
s9: hot dip galvanizing, namely performing hot galvanizing treatment on the outer surface of the screw;
s10: dehydrogenation treatment;
s11: and (6) packaging.
The production of the large-pitch long screw according to the embodiment is realized through the steps.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (5)
1. A coarse pitch long screw characterized by: comprises that
A screw body; a threaded segment; a screw head; the threaded section is positioned at one end of the screw main body, and the screw head is positioned at one end of the screw main body far away from the threaded section; the thread section comprises a thread core part and a thread part, the thread part is arranged on the outer peripheral surface of the thread core part, and the cross section outer contour of the thread part is triangular.
2. A large pitch long screw as defined in claim 1, wherein: the thread segments include a first thread segment and a second thread segment, and the thread pitch of the second thread segment is smaller than the thread pitch of the first thread segment.
3. A large pitch long screw as defined in claim 2, wherein: the thread pitch of the first thread segments is not less than twice the thread pitch of the second thread segments.
4. A large pitch long screw as defined in claim 2, wherein: the second thread section is provided with a cutting edge and a chip groove.
5. A large pitch long screw according to claim 4, wherein: the second thread segments are tapered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023027112.6U CN214146184U (en) | 2020-12-14 | 2020-12-14 | Large-pitch long screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023027112.6U CN214146184U (en) | 2020-12-14 | 2020-12-14 | Large-pitch long screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214146184U true CN214146184U (en) | 2021-09-07 |
Family
ID=77587430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023027112.6U Expired - Fee Related CN214146184U (en) | 2020-12-14 | 2020-12-14 | Large-pitch long screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214146184U (en) |
-
2020
- 2020-12-14 CN CN202023027112.6U patent/CN214146184U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210907 |