CN115111254A - Special-shaped anti-loosening threaded structure - Google Patents
Special-shaped anti-loosening threaded structure Download PDFInfo
- Publication number
- CN115111254A CN115111254A CN202210547356.1A CN202210547356A CN115111254A CN 115111254 A CN115111254 A CN 115111254A CN 202210547356 A CN202210547356 A CN 202210547356A CN 115111254 A CN115111254 A CN 115111254A
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- Prior art keywords
- thread
- contact surface
- special
- internal thread
- external thread
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- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 230000005489 elastic deformation Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/30—Locking exclusively by special shape of the screw-thread
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
A special-shaped anti-loosening threaded structure belongs to the technical field of thread loosening prevention. The special-shaped curved surface structure comprises a thread contact part and a limiting part, wherein the thread contact part is provided with an internal thread contact surface; the external thread extends outwards from the root of the external thread to form a spirally deflected convex angle structure, and the front end of the convex angle structure is provided with an external thread contact surface corresponding to the internal thread contact surface. According to the invention, the external thread of the deflection convex angle structure and the internal thread provided with the flexible special-shaped curved surface structure are correspondingly arranged, and the self-locking function of the threaded part can be realized by utilizing the thread matching structures of the external thread and the internal thread, and the thread pair structure has the advantages of good locking effect, simple structure and convenience in installation.
Description
Technical Field
The invention belongs to the technical field of thread looseness prevention, and particularly relates to a special-shaped anti-loosening thread structure.
Background
Bolt connection is one of the most common and convenient methods in industrial equipment structures, but the anti-loosening technology of nuts is always a difficult problem in the technical field. The existing anti-loosening structure forms such as anti-loosening gaskets, double-nut structures, anti-loosening of split pins, anti-loosening adhesion and the like all need too many external structures to realize the functions of the anti-loosening structure forms, increase the cost and the assembly difficulty, have an anti-loosening effect unsatisfactory, and rarely solve the anti-loosening problem fundamentally by changing the structure form of a thread pair.
After standard thread ratcheting, the forces on the teeth of the ratcheting are very uneven. The first tooth is stressed most, the second tooth and the last tooth are minimum or even in a suspension state, and the sum of the stress of the first tooth and the stress of the second tooth is generally 70% or even 80% of the thread tension, which is a very unstable stress state.
In addition, the friction pair generated in the thread pair by the bolt connection enables the bolt to be self-locked and fastened, so that the connection cannot be loosened by self under the static load. However, when the impact, vibration, variable load and temperature change are large, the stress of the previous tooth may exceed the yield point to generate plastic deformation, and the looseness is caused.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a special-shaped anti-loosening threaded structure that realizes the self-loosening function of a threaded member by means of the structure of the thread itself.
The invention provides the following technical scheme: a special-shaped anti-loosening threaded structure comprises an internal thread and an external thread corresponding to the internal thread, wherein the internal thread extends outwards from the root of the internal thread to form a spiral special-shaped curved surface structure, the special-shaped curved surface structure comprises a thread contact part and a limiting part, and an internal thread contact surface is arranged on the thread contact part; the external thread extends outwards from the root of the external thread to form a spirally deflected convex angle structure, and the front end of the convex angle structure is provided with an external thread contact surface corresponding to the internal thread contact surface.
Furthermore, the special-shaped curved surface structure is a flexible structure, and the extending direction of the special-shaped curved surface structure is the same as that of the convex angle structure.
Furthermore, the internal thread contact surface is a concave arc-shaped curved surface, the external thread contact surface is a convex arc-shaped curved surface, the internal thread contact surface is in contact with the external thread contact surface, and the contact surface between the internal thread contact surface and the external thread contact surface is a continuous spiral line.
Furthermore, the outer side surface of the limiting part is a convex arc-shaped curved surface, and a continuous curved surface structure is formed by combination of the convex arc-shaped curved surface and the inner thread contact surface.
Further, the radius R of the internal thread contact surface is larger than the radius R of the external thread contact surface.
Further, the normal angle alpha of the contact surface between the internal thread contact surface and the external thread contact surface is 60-70 degrees.
Further, the thickness delta of the thread contact part is 0.2-1.0 mm.
Furthermore, the internal thread and the external thread are processed by adopting an additive manufacturing process.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1) according to the invention, the external thread of the spiral deflection convex angle structure and the internal thread provided with the flexible special-shaped curved surface structure are correspondingly arranged, and the self-locking function of the threaded part can be realized by utilizing the thread matching structures of the external thread and the internal thread, and the thread pair has the advantages of good locking effect, simple structure and convenience in installation;
2) in the invention, the normal angle alpha of the contact surface is set to be 60-70 degrees, and on the basis of a larger normal angle alpha of the contact surface, when the inner thread and the outer thread are in screwed contact, the flexible special-shaped curved surface structure is elastically deformed, so that the normal angle alpha of the contact surface is continuously increased, and the thread pair friction force generated by normal pressure is greatly increased; meanwhile, the elastic deformation of the special-shaped curved surface structure enables the friction force and the pressing force between the internal thread and the external thread to be kept all the time; the self-locking function is achieved;
3) in the invention, when the internal thread and the external thread are in screwed contact, the contact surface between the internal thread and the external thread is a continuous spiral line, when in contact, the flexible special-shaped curved surface structure is elastically deformed, and the stress during screwing can be uniformly distributed on the whole spiral line, thereby eliminating the problem of uneven tooth pressure stress of the common thread.
Drawings
FIG. 1 is a schematic view of a screwing structure of an internal thread and an external thread according to the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic diagram of the design of structural parameters of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
Referring to fig. 1-3, a special-shaped anti-loosening threaded structure includes an internal thread 1 and an external thread 2, wherein both the internal thread 1 and the external thread 2 are processed by an additive manufacturing process; the internal thread 1 is spiral, and extends outwards from the root to form a special-shaped curved surface structure which is a flexible structure and comprises a thread contact part 101 and a limiting part 102; the external thread 2 is a lobe structure extending outward from the root thereof to form a helical deflection, and the front end of the lobe structure is arranged corresponding to the thread contact portion 101.
Specifically, an internal thread contact surface 103 is arranged on the outer side of the thread contact part 101, and the internal thread contact surface 103 is a concave arc-shaped curved surface; the outer side surface of the limiting part 102 is a convex arc-shaped curved surface, and the convex arc-shaped curved surface and the internal thread contact surface 103 are combined to form a continuous curved surface structure.
Specifically, in the external thread 2, the front end of the convex angle structure is provided with an external thread contact surface 201, and the external thread contact surface 201 is a convex arc-shaped curved surface.
Specifically, the internal thread contact surface 103 is in contact with the external thread contact surface 201, and the contact surface between the two is a continuous spiral line.
Wherein, the normal angle alpha of the contact surface between the internal thread contact surface 103 and the external thread contact surface 201 is 60-70 degrees; the radius R of the internal thread contact surface 103 is greater than four times the radius R of the external thread contact surface 201, so that the contact between threads becomes a continuous thread line, and the stress distribution is more uniform; the thickness delta of the thread contact part 101 is 0.2-1.0mm, so that the elastic deformation of the special-shaped inner thread structure can be ensured.
The working principle of the anti-loosening thread structure of the embodiment is as follows:
when the internal thread 1 and the external thread 2 are locked, the external thread contact surface 201 is tightly pressed against the internal thread contact surface 103.
Referring to FIG. 3: setting the tightening force to F a Normal pressure of F n And alpha is the angle of the normal of the contact surface, then
Following the tightening force F a The thread contact part 101 on the internal thread 1 is elastically deformed within the range of material yield strength under the action of the thread pressing force, the included angle beta between the internal thread contact surface 103 on the thread contact part 101 and the axial direction of the thread is reduced, the normal included angle alpha of the contact surface is increased, and the normal pressure F is generated n Will increase greatly and the anti-loosening friction force generated by the normal pressure will increase greatly.
At the moment, the resilience of the elastic deformation of the special-shaped curved surface structure enables the friction force and the pressing force to be always kept between the internal thread and the external thread; therefore, the self-locking function is achieved.
In addition, the contact surface between the external thread contact surface 201 and the internal thread contact surface 103 is a continuous spiral line, the stress during screwing can be uniformly distributed on the whole thread line, the flexible thread contact part 101 generates elastic deformation, and the stress during screwing can be uniformly distributed on the whole thread line, so that the problem of uneven stress of common thread teeth is solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a locking thread structure of abnormal shape which characterized in that: the special-shaped curved surface structure comprises a thread contact part and a limiting part, and an internal thread contact surface is arranged on the thread contact part; the external thread extends outwards from the root of the external thread to form a spirally deflected convex angle structure, and the front end of the convex angle structure is provided with an external thread contact surface corresponding to the internal thread contact surface.
2. The special-shaped anti-loosening thread structure as claimed in claim 1, wherein the special-shaped curved surface structure is a flexible structure, and the extension direction of the special-shaped curved surface structure is the same as that of the convex angle structure.
3. The special-shaped anti-loosening thread structure as claimed in claim 2, wherein the internal thread contact surface is a concave arc-shaped curved surface, the external thread contact surface is a convex arc-shaped curved surface, the internal thread contact surface is in contact with the external thread contact surface, and the contact surface between the internal thread contact surface and the external thread contact surface is a continuous spiral line.
4. The special-shaped anti-loose thread structure according to claim 3, wherein the outer side surface of the limiting part is a convex arc-shaped curved surface, and the convex arc-shaped curved surface and the contact surface of the internal thread are combined to form a continuous curved surface structure.
5. A profile anti-loosening thread structure according to claim 3, wherein the radius R of the contact surface of the internal thread is larger than the radius R of the contact surface of the external thread.
6. A profiled lock thread structure as claimed in claim 5, wherein the normal angle α of the contact surface between the internal thread contact surface and the external thread contact surface is 60-70 °.
7. A profile type check thread structure according to claim 1 or 6, wherein said thread contact portion has a thickness δ of 0.2-1.0 mm.
8. The special-shaped anti-loosening thread structure as claimed in claim 7, wherein the internal thread and the external thread are both processed by an additive manufacturing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547356.1A CN115111254A (en) | 2022-05-19 | 2022-05-19 | Special-shaped anti-loosening threaded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547356.1A CN115111254A (en) | 2022-05-19 | 2022-05-19 | Special-shaped anti-loosening threaded structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115111254A true CN115111254A (en) | 2022-09-27 |
Family
ID=83325500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210547356.1A Pending CN115111254A (en) | 2022-05-19 | 2022-05-19 | Special-shaped anti-loosening threaded structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115111254A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5171457A (en) * | 1974-11-15 | 1976-06-21 | Litton Industries Inc | Serufutatsupingunejitsukikochakukumitatetai |
| JPH07139536A (en) * | 1993-11-19 | 1995-05-30 | Tomimura Noriko | Fastening member and manufacture thereof |
| CN1346029A (en) * | 2000-10-02 | 2002-04-24 | 石森悠索 | Screw piece |
| CN1619165A (en) * | 2003-10-31 | 2005-05-25 | Sgl碳股份公司 | Threaded connection for carbon and/or graphite electrode columns |
| CN2718303Y (en) * | 2004-08-04 | 2005-08-17 | 王起征 | Full-thread locknut |
| CN1693723A (en) * | 2004-04-30 | 2005-11-09 | 伯尔霍夫连接技术有限公司 | A joining assembly including a plastic support member and a plastic threaded element |
| JP2011220387A (en) * | 2010-04-06 | 2011-11-04 | Hamanaka Nut Kk | Screw looseness preventive structure |
| CN103328835A (en) * | 2010-11-26 | 2013-09-25 | 鲁艾亚全球扣具股份公司 | Self-locking screw |
| JP2014206234A (en) * | 2013-04-13 | 2014-10-30 | 辻坂 宏 | Fastening member |
| KR20170128875A (en) * | 2016-05-16 | 2017-11-24 | 구정언 | Flexible anti-releasing bolt |
| CN108119486A (en) * | 2016-11-27 | 2018-06-05 | 余小春 | Full-thread locknut |
| CN110617264A (en) * | 2019-10-11 | 2019-12-27 | 李武彬 | Elastic thread anti-loosening fastening device |
| CN111561506A (en) * | 2020-06-11 | 2020-08-21 | 上海铁院轨道交通科技有限公司 | Curved surface type variable tooth type locknut |
| JP2021105444A (en) * | 2019-12-26 | 2021-07-26 | ハードロック工業株式会社 | Fastening structure |
-
2022
- 2022-05-19 CN CN202210547356.1A patent/CN115111254A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5171457A (en) * | 1974-11-15 | 1976-06-21 | Litton Industries Inc | Serufutatsupingunejitsukikochakukumitatetai |
| JPH07139536A (en) * | 1993-11-19 | 1995-05-30 | Tomimura Noriko | Fastening member and manufacture thereof |
| CN1346029A (en) * | 2000-10-02 | 2002-04-24 | 石森悠索 | Screw piece |
| CN1619165A (en) * | 2003-10-31 | 2005-05-25 | Sgl碳股份公司 | Threaded connection for carbon and/or graphite electrode columns |
| CN1693723A (en) * | 2004-04-30 | 2005-11-09 | 伯尔霍夫连接技术有限公司 | A joining assembly including a plastic support member and a plastic threaded element |
| CN2718303Y (en) * | 2004-08-04 | 2005-08-17 | 王起征 | Full-thread locknut |
| JP2011220387A (en) * | 2010-04-06 | 2011-11-04 | Hamanaka Nut Kk | Screw looseness preventive structure |
| CN103328835A (en) * | 2010-11-26 | 2013-09-25 | 鲁艾亚全球扣具股份公司 | Self-locking screw |
| JP2014206234A (en) * | 2013-04-13 | 2014-10-30 | 辻坂 宏 | Fastening member |
| KR20170128875A (en) * | 2016-05-16 | 2017-11-24 | 구정언 | Flexible anti-releasing bolt |
| CN108119486A (en) * | 2016-11-27 | 2018-06-05 | 余小春 | Full-thread locknut |
| CN110617264A (en) * | 2019-10-11 | 2019-12-27 | 李武彬 | Elastic thread anti-loosening fastening device |
| JP2021105444A (en) * | 2019-12-26 | 2021-07-26 | ハードロック工業株式会社 | Fastening structure |
| CN111561506A (en) * | 2020-06-11 | 2020-08-21 | 上海铁院轨道交通科技有限公司 | Curved surface type variable tooth type locknut |
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