CN113669342A - Fastener bionic structure with anti-loosening performance - Google Patents
Fastener bionic structure with anti-loosening performance Download PDFInfo
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- CN113669342A CN113669342A CN202110926764.3A CN202110926764A CN113669342A CN 113669342 A CN113669342 A CN 113669342A CN 202110926764 A CN202110926764 A CN 202110926764A CN 113669342 A CN113669342 A CN 113669342A
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- thread
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- fastener
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- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 description 26
- 230000003993 interaction Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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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
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a fastener bionic structure with anti-loosening performance, which comprises an external thread piece and an internal thread piece, wherein the external thread piece is provided with an inner hole, the inner wall surface of the inner hole is provided with an internal thread, the surface of the internal thread piece is provided with a solid protrusion, the outer wall surface of the protrusion is provided with an external thread, and the external thread piece and the internal thread piece are connected by mutually meshing the internal thread and the external thread. The invention is based on the skeleton connecting structure, improves the contact area between the threads, greatly improves the connecting stability and the anti-loosening performance of the bolt, and lays a foundation for further researching the anti-loosening of the bolt.
Description
Technical Field
The invention belongs to the field of bionic design, and relates to a fastener bionic structure with anti-loosening performance.
Background
The bolt connection has the advantages of wide application in the fields of machinery, traffic, aerospace, ships, furniture, buildings and the like, strong bolt connection capacity, simplicity in disassembly, convenience in repeated application, easiness in mass production, low manufacturing cost and convenience in maintenance, and becomes the most common and most applicable connection mode in structural assembly. However, when the bolt connection is disturbed by an external load, the bolt connection is often loosened and failed, thereby affecting the performance of the whole structure, and thus possibly causing very serious personal safety and property loss. Especially for the bolt connection of key position, the stability of bolt connection is more important.
At present, the shape of the thread mainly comprises a trapezoid, a triangle, a circle, a rectangle and the like, but the stability of the bolt is still deficient, and the performance of the bolt connection is greatly influenced by load fluctuation. In recent years, in order to further improve the stability of the bolt connection, a great deal of research work has been carried out by various researchers and technicians, and the research work mainly focuses on both aspects of test testing and finite element simulation. However, these measures do not fundamentally solve the problem of bolt loosening, and cannot provide a solid foundation for subsequent assembly.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a fastener bionic structure with anti-loosening performance, has high connection precision and good anti-loosening performance, is easy to popularize and apply, can adopt threaded pieces of different grades according to the connection occasions of a system, and has strong adaptability. The invention also lays a good foundation for further anti-loosening research of the bolt connecting system.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a fastener bionic structure with anti-loosening performance comprises an external thread piece and an internal thread piece;
the external screw member is provided with an inner hole, and the inner wall surface of the inner hole is provided with an inner thread;
the surface of the internal thread piece is provided with a solid protrusion, and the outer wall surface of the protrusion is provided with an external thread;
the external thread member and the internal thread member are connected by the mutual engagement of the internal thread teeth and the external thread teeth.
The invention is further improved in that:
the internal thread comprises a tooth root and a tooth top; the external thread teeth comprise tooth roots and tooth tops.
The cross section of the crest of the inner thread is hexagonal, and the cross section of the root of the inner thread is triangular; the cross section of the crest of the external thread is trapezoidal, and the cross section of the root of the external thread is hexagonal.
Two sides between the crest and the root of the inner thread are provided with grooves with triangular sections, which are called as first movement limiting surfaces of the inner thread; the two sides between the crest and the root of the external thread are provided with trapezoidal section bulges which are called as second limited moving surfaces of the external thread.
During the process of screwing the external thread member into the internal thread member, the first movement limiting surface of the internal thread ridge and the second movement limiting surface of the external thread ridge rub against each other to limit radial dislocation and axial deviation between the external thread member and the internal thread member.
The vertex angle of the triangular section groove between the crest and the root of the internal thread is 60 degrees.
The specific method for connecting the external thread piece and the internal thread piece through mutual occlusion of the internal thread teeth and the external thread teeth comprises the following steps:
the tooth root of the internal thread tooth is mutually occluded with the tooth top of the external thread tooth, and the tooth top of the internal thread tooth is mutually engaged with the tooth root of the external thread tooth.
The external thread piece and the internal thread piece are made of metal materials.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a fastener bionic structure with anti-loosening performance, which comprises an external thread piece and an internal thread piece, wherein the external thread piece is provided with an inner hole, the inner wall surface of the inner hole is provided with an internal thread, the surface of the internal thread piece is provided with a solid protrusion, the outer wall surface of the protrusion is provided with an external thread, the external thread piece and the internal thread piece are connected by mutually meshing the internal thread and the external thread, and the structures form the basis of stable connection of a bolt, reduce the looseness of the bolt and improve the connection precision.
Furthermore, the cross section of the crest of the inner thread of the bionic structure of the fastener is hexagonal, and the cross section of the root of the inner thread is triangular; the cross section of the crest of the external thread is trapezoidal, and the cross section of the root of the external thread is hexagonal. During the process of screwing the external thread member into the internal thread member, the first movement limiting surface of the internal thread ridge and the second movement limiting surface of the external thread ridge rub against each other to limit radial dislocation and axial deviation between the external thread member and the internal thread member. The invention is based on the skeleton connecting structure, improves the contact area between the threads, greatly improves the connecting stability and the anti-loosening performance of the bolt, and lays a foundation for further researching the anti-loosening of the bolt.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of a conventional acme threaded connection prior to assembly;
FIG. 2 is a schematic view of a conventional acme threaded connection after assembly;
FIG. 3 is a schematic illustration of an embodiment of the present invention prior to assembly;
FIG. 4 is a schematic view of an assembled embodiment of the invention.
Wherein: 1-external thread element, 2-internal thread element, 3-internal thread ridge, 4-external thread ridge, 5-first movement limiting surface, 6-second movement limiting surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, fig. 1 is a schematic view of a conventional acme threaded connection before assembly, and fig. 2 is a schematic view of a conventional acme threaded connection after assembly; the invention is based on the improvement of common trapezoidal thread.
Referring to fig. 3 and 4, fig. 3 is a schematic view of an embodiment of the present invention before assembly, and fig. 4 is a schematic view of an embodiment of the present invention after assembly; the embodiment of the invention discloses a fastener bionic structure with anti-loosening performance, which comprises a fastener bionic structure body, wherein the fastener bionic structure body comprises an external thread part 1 and an internal thread part 2.
The external screw member 1 has an inner hole, an inner thread 3 is provided on the inner wall surface of the inner hole, a solid protrusion is provided on the surface of the internal screw member 2, an outer thread 4 is provided on the outer wall surface of the protrusion, and the internal screw member 2 is in threaded connection with the external screw member 1. In the direction that external screw member 1 screwed up towards internal screw member 2, the one side that internal thread tooth 3 and external screw thread tooth 4 extruded each other becomes the atress extrusion face respectively, the atress extrusion face includes the 3 atress extrusion faces of internal thread tooth on the internal thread tooth 3 and the external screw thread tooth atress extrusion face on the external screw thread tooth 4, the one side that the atress extrusion face of internal thread tooth 3 and external screw thread tooth 4 is relative forms non-atress extrusion face, non-atress extrusion face includes the 3 non-atress extrusion faces of internal thread tooth on the internal thread tooth 3 and the non-atress extrusion faces of external screw thread tooth on the external screw thread tooth 4.
The fastener bionic structure with the anti-loosening performance mainly comprises an external thread part 1 and an internal thread part 2. The external screw member 1 is provided with a cylindrical inner hole, and the inner wall surface of the cylindrical inner hole is provided with internal screw threads 3 extending along a spiral line. Processing has cylindric solid construction on the internal thread spare 2, and the outer wall processing of the cylindric solid construction of internal thread spare 2 has the external screw thread tooth 4 that extends along the helix, and external screw thread tooth 4 corresponds with internal screw thread tooth 3 each other.
The external thread member 1 and the internal thread member 2 are in threaded connection, and during the screwing process, an interaction force can be formed between the external thread member 1 and the internal thread member 2, and the interaction force can comprise a pressure force and a friction force. At this time, in the direction of screwing the external screw member 1 to the internal screw member 2, the mutually-extruded sides of the internal screw thread 3 and the external screw thread 4 may be respectively formed as stress extrusion surfaces, the stress extrusion surfaces include the stress extrusion surfaces of the internal screw thread 3 on the internal screw thread 3 and the external screw thread on the external screw thread 4, and the interaction force between the external screw member 1 and the internal screw member 2 is mainly generated on the stress extrusion surfaces. The opposite sides of the internal thread ridge 3 and the external thread ridge 4 to the forced compression surfaces may be formed as non-forced compression surfaces, respectively. The non-stressed extrusion surfaces comprise inner thread non-stressed extrusion surfaces on the inner thread teeth 3 and outer thread non-stressed extrusion surfaces on the outer thread teeth 4. The internal thread 3 non-stressed extrusion surfaces and the external thread 4 non-stressed extrusion surfaces can have a geometrical matching relationship, but can not generate obvious interaction force.
Processing has first restriction removal face 5 on internal thread tooth atress extrusion face and the internal thread tooth non-atress extrusion face, and processing has second restriction removal face 6 on external thread tooth atress extrusion face and the external thread tooth non-atress extrusion face, and first restriction removal face 5 can end the second restriction removal face 6 that corresponds, radial dislocation and axial deflection between restriction external screw thread spare 1 and the internal screw thread spare 2.
It should be noted that, in the embodiments of the present invention, the thread refers to a tooth body with a certain tooth form and protruding periodically along a spiral line on the surface of a cylinder, a cone or other revolution body. Thread profile refers to the cross-sectional profile of the thread in the plane of the axis of the cylinder, cone, or other body of revolution. Conventional thread forms are: triangular, trapezoidal, rectangular, saw-tooth, etc. The threads can be left-handed or right-handed, single-threaded or multi-threaded.
In the embodiment of the present invention, the thread provided on the wall surface of the cylindrical bore (the cylindrical bore is a cylinder, a cone or another revolution body) of the male screw member 1 may be represented as a female thread, and the thread provided on the outer surface of the cylindrical solid structure (the cylindrical solid structure is a cylinder, a cone or another revolution body) of the female screw member 2 may be represented as a male thread. The central axes of the cylindrical, conical or other solid of revolution features contained by the male element 1 and the female element 2 are referred to as the axes of the male element 1 and the female element 2, respectively, and ideally, the axes of the male element 1 and the female element 2 coincide. A direction perpendicular to the axis of the male screw member 1 is referred to as a radial direction of the male screw member 1, and a direction perpendicular to the axis of the female screw member 2 is referred to as a radial direction of the female screw member 2.
It should be noted that the external thread member 1 may represent a complete part having an internal thread, such as a nut or a nut, or may represent a local region having an internal thread characteristic on a complex structure, such as a local region having an internal thread machined on an engine cylinder or a local region having an internal thread machined on a large bridge structure, and may be regarded as the external thread member 1, and in short, a complete part or a local region on a structure may be regarded as the external thread member 1 as long as it has an internal thread characteristic. Meanwhile, the internal thread member 2 may represent a complete part including an external thread, such as a bolt, a screw, etc., or may represent a local region including an external thread feature on a complex structure, such as an end region on which an external thread is processed on some engine spindles, etc., and may also be regarded as the internal thread member 2, and in short, a complete part or a local region on a structure may be regarded as the internal thread member 2 as long as the external thread feature is included.
After the thread pair is screwed down, mutual acting force, including pressure and friction force, can be formed between the inner thread and the outer thread. After the screw pair is screwed, the interaction force of the internal and external screw parts mainly acts on the stressed extrusion surface.
The side opposite to the stressed extrusion surface of the internal and external threads is called an unstressed extrusion surface, and in the unstressed extrusion surface, the internal and external threads are in geometric matching relationship, but obvious interaction force is not necessarily generated.
The effect of the radial offset described in the embodiments of the present invention is to offset the axis of the male screw member 1 and the axis of the female screw member 2 from the normal coincident position. In other words, the effect of the radial misalignment described in the embodiments of the present invention is to cause misalignment, or lateral misalignment, of the male and female threaded members 1 and 2 in a direction perpendicular to the axes of the two members. The effect of the axial offset described in the embodiments of the present invention is that the male screw member 1 and the female screw member 2 are offset in the axial direction substantially after tightening.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A fastener bionic structure with anti-loosening performance is characterized by comprising an external thread part (1) and an internal thread part (2);
the external thread piece (1) is provided with an inner hole, and an inner thread (3) is arranged on the inner wall surface of the inner hole;
the surface of the internal thread piece (2) is provided with a solid protrusion, and the outer wall surface of the protrusion is provided with an external thread (4);
the external thread member (1) and the internal thread member (2) are connected by mutually meshing an internal thread (3) and an external thread (4).
2. The fastener bionic structure with the anti-loosening performance is characterized in that the internal thread (3) comprises a root and a crest; the external thread teeth (4) comprise tooth roots and tooth tops.
3. The fastener bionic structure with the anti-loosening performance is characterized in that the cross-sectional shape of the crest of the internal thread (3) is a hexagon, and the cross-sectional shape of the root of the internal thread (3) is a triangle; the cross section of the crest of the external thread (4) is trapezoidal, and the cross section of the root of the external thread (4) is hexagonal.
4. The fastener bionic structure with the anti-loosening performance is characterized in that grooves with triangular sections are formed between the crest and the root of the internal thread (3) on two sides, namely a first movement limiting surface (5) of the internal thread (3); and trapezoidal cross-section protrusions are arranged on two sides between the crest and the root of the external thread (4) and are called as second movement limiting surfaces (6) of the external thread (4).
5. The fastener bionic structure with the anti-loosening performance is characterized in that the first movement limiting surface (5) of the inner thread tooth (3) and the second movement limiting surface (6) of the outer thread tooth (4) rub against each other to limit radial dislocation and axial deviation between the outer thread part (1) and the inner thread part (2) in the process that the outer thread part (1) is screwed to the inner thread part (2).
6. Fastener bionic structure with looseness-proof performance according to claim 2, wherein the vertex angle of the triangular cross-section groove between the crest and the root of the internal thread (3) is 60 degrees.
7. The fastener bionic structure with the anti-loosening performance according to claim 2 is characterized in that the male thread member (1) and the female thread member (2) are connected through mutual meshing of the female thread ridge (3) and the male thread ridge (4) by the specific method that:
the tooth root of the internal thread (3) is mutually occluded with the tooth top of the external thread (4), and the tooth top of the internal thread (3) is mutually engaged with the tooth root of the external thread (4).
8. The fastener bionic structure with the anti-loosening performance is characterized in that the external thread part (1) and the internal thread part (2) are both made of metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110926764.3A CN113669342A (en) | 2021-08-12 | 2021-08-12 | Fastener bionic structure with anti-loosening performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110926764.3A CN113669342A (en) | 2021-08-12 | 2021-08-12 | Fastener bionic structure with anti-loosening performance |
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| CN113669342A true CN113669342A (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110926764.3A Pending CN113669342A (en) | 2021-08-12 | 2021-08-12 | Fastener bionic structure with anti-loosening performance |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1510709A (en) * | 1966-02-16 | 1968-01-19 | Lamson & Sessions Co | lock nut and its manufacturing process |
| KR870004745A (en) * | 1985-11-22 | 1987-06-01 | 무라까와 히로하루 | Self-fixed purchasing screws, rolling method and rolling flat dies |
| CN200961618Y (en) * | 2006-10-27 | 2007-10-17 | 付家武 | Loose-proof anti-theft nut |
| CN201786901U (en) * | 2009-05-21 | 2011-04-06 | 上海底特精密紧固件有限公司 | Fastening component with internal threads and thread fastening component |
| CN108397463A (en) * | 2018-04-02 | 2018-08-14 | 北京理工大学 | Include the anti-loosening threaded pair and checknut part of confined planes |
| CN207864392U (en) * | 2017-12-15 | 2018-09-14 | 北京理工大学 | Anti-loosening threaded pair and checknut part |
| CN212717574U (en) * | 2020-05-21 | 2021-03-16 | 番禺得意精密电子工业有限公司 | Thread structure |
-
2021
- 2021-08-12 CN CN202110926764.3A patent/CN113669342A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1510709A (en) * | 1966-02-16 | 1968-01-19 | Lamson & Sessions Co | lock nut and its manufacturing process |
| KR870004745A (en) * | 1985-11-22 | 1987-06-01 | 무라까와 히로하루 | Self-fixed purchasing screws, rolling method and rolling flat dies |
| CN200961618Y (en) * | 2006-10-27 | 2007-10-17 | 付家武 | Loose-proof anti-theft nut |
| CN201786901U (en) * | 2009-05-21 | 2011-04-06 | 上海底特精密紧固件有限公司 | Fastening component with internal threads and thread fastening component |
| CN207864392U (en) * | 2017-12-15 | 2018-09-14 | 北京理工大学 | Anti-loosening threaded pair and checknut part |
| CN108397463A (en) * | 2018-04-02 | 2018-08-14 | 北京理工大学 | Include the anti-loosening threaded pair and checknut part of confined planes |
| CN212717574U (en) * | 2020-05-21 | 2021-03-16 | 番禺得意精密电子工业有限公司 | Thread structure |
Non-Patent Citations (1)
| Title |
|---|
| 郭宝喜: "Fe-Mn-Si形状记忆合金螺栓紧固防松研究", 《工程科技Ⅰ辑》 * |
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