CN203453245U - Light-weight anti-fatigue self-locking nut - Google Patents
Light-weight anti-fatigue self-locking nut Download PDFInfo
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- CN203453245U CN203453245U CN201320483728.5U CN201320483728U CN203453245U CN 203453245 U CN203453245 U CN 203453245U CN 201320483728 U CN201320483728 U CN 201320483728U CN 203453245 U CN203453245 U CN 203453245U
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Abstract
The utility model discloses a light-weight anti-fatigue self-locking nut which comprises a nut body with inner threads. The nut body is formed by a twisting section and a bearing section, a neck-breaking groove is formed between the twisting section and the bearing section, and a lightening groove is formed in the inner portion of the twisting section in the length direction of the nut body. According to the light-weight anti-fatigue self-locking nut, on the bases that the structural strength and the anti-fatigue strength of a common nut are not reduced, through the optimization on the structure and the shape of the nut, the lightening groove and the neck-breaking groove are formed in the self-locking nut, when the light-weight anti-fatigue self-locking nut is used, the twisting surfaces of the self-locking nut are twisted by using a wrench, when a preset mounting pretightening force value is reached, the twisting section arranged on the nut will break off from the neck-breaking groove position, the weight of the self-locking nut is reduced greatly, the fact that the weight of the self-locking nut is minimized under the condition that the pretightening force is controllable is guaranteed, and the light-weight anti-fatigue self-locking nut can be widely applied to the technical fields of aircraft connecting pieces of aviation, spaceflight and the like.
Description
Technical field
The utility model belongs to and is fastenedly connected technical field, relates to a kind of light antifatigue self-locking nut
Background technique
At present, in aircraft parts design, multifunctionality, the high-end fastener technology of minimize weight requires high, and expensive.Especially the temperature high performance high fastening piece of motor class is few, manufacture difficulty super large.Along with the development of modern science and technology, raw-material performance is improving greatly, and especially impurity reduces, strength increase, and plasticity enhancing and property etc., the crystal grain of some special forging becomes elongated linearity, and crystal grain is uninterrupted, and its fatigability improves greatly.Yet weight is a parameter of fastening piece most critical, especially on aircraft, the minimize weight of fastening piece used is a maximum puzzlement all the time.On aerospace vehicle, overweight is all undesirable.A Medium Plane can reach 2～300 ten thousand with various types of fastening pieces, and the gross weight of present generation aircraft fastening piece used accounts for 6% of aircraft gross weight, and wherein nut accounts for 2% of gross weight.For realizing as far as possible the minimize weight of fastening piece in aircraft parts, various self-locking nuts have been there are on the market at present, but these nuts are mostly to reach by reducing this health of nut the object that reduces weight, therefore in assurance, reach on the basis of usability, the weight saving of existing self-locking nut is unsatisfactory, and the pretightening force of existing self-locking nut is uncontrollable simultaneously.Therefore how realizing self-locking nut minimize weight, self-locking nut pretightening force can be controlled, is current relevant enterprise circle problem demanding prompt solution.
Summary of the invention
In order to address the above problem, the utility model provides a kind of light antifatigue self-locking nut.
The utility model is achieved by following technical solution.
A light antifatigue self-locking nut, comprises and is with female nut body, and described nut body is comprised of twisting section and carrying section, between twisting section and carrying section, is provided with cut-off neck slot, at twisting intersegmental part, along nut body length direction, is provided with and alleviates groove.
Described twisting section comprises outer twisting face and interior twisting face, and the section configuration of its China and foreign countries' twisting face is for circle, annular knurl shape or be 3～12 limit shapes.
The described groove that alleviates is for a circular groove being comprised of inner side surface, interior twisting face and bottom, wherein bottom and cut-off neck slot by the one side of carrying section in same plane.
Described inner side surface is circular, and interior twisting face is circle or polygonal, and is provided with 1～6 lateral extrusion point at the inside hand of spiral in the middle part of inner side surface.
The described cross section that alleviates groove is rectangle.
The described cross section that alleviates groove is triangle or wedge shape.
Described carrying section is provided with supporting surface, is provided with profile of tooth, plane or step on supporting surface.
The manufacture method of above-mentioned self-locking nut is directly by mold pressing or forging and stamping, to form self-locking nut, and during fabrication, mainly step is carried out as follows:
A, manufacture nut body and alleviate groove: according to the specification of self-locking nut to be processed, utilize forging, bar or sheet material to become nut body and alleviate groove as the direct mold pressing of base material or the forging forming of self-locking nut;
B, until the nut body described in step a and alleviate that channel mould is pressed or forging forming after, for the specification of above-mentioned self-locking nut, process successively outer twisting face, cut-off neck slot and supporting surface;
C, after twisting face, cut-off neck slot and supporting surface outside the processing successively described in step b, Screw thread process method machining internal thread routinely;
D, after the machining internal thread of Screw thread process method routinely described in step c, at the inside hand of spiral in middle part that alleviates the inner side surface of groove, carry out 1～6 extrusion-deformation.
In described step a, the substrate material of self-locking nut is refractory alloy, titanium alloy, high tensile steel or Ultrastrength Steel.
In described step a, the number of times of mold pressing or forging and stamping is 3～6 times.
The beneficial effects of the utility model are:
Compared with prior art, the utility model is not reducing on the basis of plain nut structural strength and fatigue resistance, by the optimization to nut structure shape, on self-locking nut, arrange and alleviate groove and cut-off neck slot, in use, by the twisting face with spanner twisting self-locking nut, when reaching predetermined installation pretightening force value, the twisting section being arranged on nut is just broken from cut-off neck slot, greatly reduce the weight of self-locking nut, thereby in the situation that guarantees controlled pretightening force, realize the minimize weight of self-locking nut.Adopt self-locking nut described in the utility model, self-locking nut weight can be reduced to 40% original left and right, just alleviating 1～1.5% the weight that is equivalent to aircraft gross weight aspect fastener nut connection, the lifting capacity of aircraft will be had to very large contribution.The bottom that simultaneously can connect by changing the cut-off neck slot between twisting section and carrying section on nut body regulates the pretightening force of control needs to the distance of interior twisting face, to meet different usage requirements of installing under operating mode, reach the controllable object of pretightening force.The utility model is simple in structure, and pretightening force can be controlled, and safety reliability is high, easy to maintenance, and manufacturing process is simple and direct, can be in aircraft link technical field wide popularization and application such as Aeronautics and Astronautics.
Accompanying drawing explanation
Fig. 1 is embodiment's one structural representation of the present utility model;
Fig. 2 is the sectional structure schematic diagram of Fig. 1;
Fig. 3 is embodiment's two structural representations of the present utility model;
Fig. 4 is the sectional structure schematic diagram of Fig. 3;
Fig. 5 is embodiment's three structural representations of the present utility model;
Fig. 6 is the sectional structure schematic diagram of Fig. 5;
Fig. 7 is Application Example schematic diagram of the present utility model.
In figure: 1-twisting section, 2-alleviates groove, 3-internal thread, 4-cut-off neck slot, 5-carries section, 6-nut body, 7-plate A to be connected, 8-plate B to be connected, 9-construction bolt, the outer twisting face of 101-, twisting face in 102-, 201-inner side surface, 501-supporting surface.
Embodiment
Below in conjunction with accompanying drawing, further describe the technical solution of the utility model, but described in claimed scope is not limited to.
As shown in Figures 1 to 6, a kind of light antifatigue self-locking nut described in the utility model, comprise the nut body 6 with internal thread 3, described nut body 6 is comprised of twisting section 1 and carrying section 5, between twisting section 1 and carrying section 5, be provided with cut-off neck slot 4, in twisting section 1 inside, along nut body 6 length directions, be provided with and alleviate groove 2.
Described twisting section 1 comprises outer twisting face 101 and interior twisting face 102, and the section configuration of its China and foreign countries' twisting face 101 is for circle, annular knurl shape or be 3～12 limit shapes.
Described groove 2 circular groove for being comprised of inner side surface 201, interior twisting face 102 and bottom that alleviates, wherein bottom and cut-off neck slot 4 are by carrying sections 5 one side in same plane.In actual use, the twisting face 101 with spanner twisting self-locking nut, until twisting section 1 is twisted into two parts from cut-off neck slot 4, can reach predetermined installation pretightening force value like this, can greatly alleviate the weight of self-locking nut simultaneously.Due to alleviate the bottom of groove 2 and cut-off neck slot 4 by the one side of carrying section 5 in same plane, make twisting section 1 when by switch out, not affect use and the appearance quality of self-locking nut.
Described inner side surface 201 is circular, and interior twisting face 102 is circle or polygonal, and to internal thread 3 directions, is provided with 1～6 lateral extrusion point at the middle part of inner side surface 201.So during fabrication can be at the middle part of inner side surface 201 to internal thread 3 direction 1～6 extrusion-deformation, make the part material convex of its internal thread 3 and change the central diameter size of internal thread 3, thereby realize auto-lock function.
The described cross section that alleviates groove 2 is rectangle.As shown in Figure 2, Figure 4 shows, the shape that at this moment alleviates groove 2 can be an annular cylinder groove, can be also the circular groove of inner circle foreign side.
The described cross section that alleviates groove 2 is triangle or wedge shape.At this moment the shape that alleviates groove 2 just forms an annular frustoconic shape groove, and it is leg-of-mutton structure that Fig. 2 shows the cross section that alleviates groove 2.
Described carrying section 5 is provided with supporting surface 501, is provided with profile of tooth, plane or step on supporting surface 501.In actual applications, supporting surface 501 can also be arranged to other arbitrary shapes, as long as and Matrix Match.
The utility model, by utilizing modern high technology material and manufacturing process, is overturned old-fashioned and inflexible anchor design style drawing, has solved the large problem of weight in puzzlement Flight Vehicle Design.Improve fatigability simultaneously, increase reliability.Controlled pretightening force is good, and safety reliability is high, easy to maintenance.
As shown in Figure 7, light antifatigue self-locking nut described in the utility model is when using, first construction bolt 9 is passed after the mounting hole of plate 7A to be connected and plate 8B to be connected, be screwed in the internal thread 3 of self-locking nut described in the utility model, and then self-locking nut is tightened by twisting face 101 with spanner, until spanner is twisted into two parts twisting section 1 from cut-off neck slot 4.Can not only reach so predetermined installation pretightening force value, also greatly alleviate the weight of self-locking nut.
Further illustrate the manufacture method of light antifatigue self-locking nut described in the utility model below, the method is directly by mold pressing or forging and stamping, to form self-locking nut, mainly comprises following method step:
A, manufacture nut body 1 and alleviate groove 2: according to the specification of self-locking nut to be processed, utilizing forging, bar or sheet material to become nut body 1 and alleviate groove 2 as the direct mold pressing of base material or the forging forming of self-locking nut; Nut body 1 and alleviate the groove direct mold pressing of 2 one or excellent suitability for press forming, guaranteed that inner side surface 201 does not fracture and to form the wire of prolate to the crystal grain of internal thread 3 part materials after mold pressing or forging forming, be that grain flow line is evenly complete, after material flow harden, greatly strengthen its tensile strength and fatigue strength.
B, until the nut body 1 described in step a with alleviate after groove 2 mold pressings or forging forming, for the specification of above-mentioned self-locking nut, process successively outer twisting face 101, cut-off neck slot 4 and supporting surface 501;
C, after twisting face 101, cut-off neck slot 4 and supporting surface 501 outside the processing successively described in step b, Screw thread process method machining internal thread 3 routinely;
D, after the machining internal thread of Screw thread process method routinely 3 described in step c, at the middle part that alleviates the inner side surface 201 of groove 2, to internal thread 3 directions, carry out 1～6 extrusion-deformation.At the middle part that alleviates the inner side surface 201 of groove 2, to internal thread 3 directions, carry out 1～6 extrusion-deformation.Make like this part material convex of its internal thread 3 and change the central diameter size of internal thread 3, thereby realize auto-lock function.The quantity of extrusion-deformation point can be determined according to self-locking nut specification to be processed.
In described step a, the substrate material of self-locking nut is refractory alloy, titanium alloy, high tensile steel or Ultrastrength Steel.Adopt above-mentioned advanced person's hitech materials, intensity and the plasticity of material are fabulous, and its crystal grain does not fracture and forms the wire of prolate after mold pressing or forging forming, and grain flow line is evenly complete, greatly strengthens its tensile strength and fatigue strength after material flow harden.In Practical manufacturing, the base material of self-locking nut can adopt other special steel grades, as long as the intensity of material is greater than 1100MPa and plasticity is fabulous, all can.The utility model is when material selection, and the design parameter at material plasticity place is: specific elongation δ >=8; Reduction of cross sectional area ψ >=12; Ballistic work α κ >=250.
In described step a, the number of times of mold pressing or forging and stamping is 3～6 times.Owing to adopting the self-locking nut of above-mentioned material manufacture need to reach 70% amount of deformation, just there is good high-temperature behavior.And heating-up temperature is carried out between 800 ℃ to 1600 ℃ degree while forging, so only have through mold pressing or forging and stamping repeatedly, high cycle fatigue, low cycle fatigue, the mechanical propertys such as high temperature endurance performance and high temperature tension could meet, making tensile strength is that 1100MPa is to 2100MPa, most of material all at 1380MPa between 1500MPa, safety coefficient is preferably between 5 to 12.
In actual applications, in order effectively to control the pretightening force of light antifatigue self-locking nut, first according to the needed pretightening force when tightening of this self-locking nut in air equipment, then by changing the bottom of cut-off neck slot to the distance of interior twisting face, this light antifatigue self-locking nut is installed to the forcemeter that can survey pretightening force, can extrapolate the bottom of cut-off neck slot to the distance of interior twisting face and the function relation between pretightening force, thereby realize controlled pretightening force.
Claims (7)
1. a light antifatigue self-locking nut, comprise the nut body (6) with internal thread (3), it is characterized in that: described nut body (6) is comprised of twisting section (1) and carrying section (5), between twisting section (1) and carrying section (5), be provided with cut-off neck slot (4), in twisting section (1) inside, along nut body (6) length direction, be provided with and alleviate groove (2).
2. a kind of light antifatigue self-locking nut according to claim 1, it is characterized in that: described twisting section (1) comprises outer twisting face (101) and interior twisting face (102), the section configuration of its China and foreign countries' twisting faces (101) is for circle, annular knurl shape or be 3～12 limit shapes.
3. a kind of light antifatigue self-locking nut according to claim 1, it is characterized in that: described in alleviate groove (2) for a circular groove being formed by inner side surface (201), interior twisting face (102) and bottom, wherein bottom and cut-off neck slot (4) by the one side of carrying section (5) in same plane.
4. a kind of light antifatigue self-locking nut according to claim 3, it is characterized in that: described inner side surface (201) is for circular, interior twisting face (102) is circle or polygonal, and to internal thread (3) direction, is provided with 1～6 lateral extrusion point at the middle part of inner side surface (201).
5. a kind of light antifatigue self-locking nut according to claim 1, is characterized in that: described in alleviate groove (2) cross section be rectangle.
6. a kind of light antifatigue self-locking nut according to claim 1, is characterized in that: described in alleviate groove (2) cross section be triangle or wedge shape.
7. a kind of light antifatigue self-locking nut according to claim 1, is characterized in that: described carrying section (5) is provided with supporting surface (501), on supporting surface (501), is provided with profile of tooth, plane or step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320483728.5U CN203453245U (en) | 2013-08-08 | 2013-08-08 | Light-weight anti-fatigue self-locking nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320483728.5U CN203453245U (en) | 2013-08-08 | 2013-08-08 | Light-weight anti-fatigue self-locking nut |
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| Publication Number | Publication Date |
|---|---|
| CN203453245U true CN203453245U (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320483728.5U Expired - Fee Related CN203453245U (en) | 2013-08-08 | 2013-08-08 | Light-weight anti-fatigue self-locking nut |
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| CN (1) | CN203453245U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452986A (en) * | 2013-08-08 | 2013-12-18 | 贵州航天精工制造有限公司 | Light anti-fatigue self-locking nut and manufacture method thereof |
| CN105156445A (en) * | 2015-10-20 | 2015-12-16 | 贵州航天精工制造有限公司 | Double-lug spherical multifunctional hi-lock nut |
-
2013
- 2013-08-08 CN CN201320483728.5U patent/CN203453245U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452986A (en) * | 2013-08-08 | 2013-12-18 | 贵州航天精工制造有限公司 | Light anti-fatigue self-locking nut and manufacture method thereof |
| CN103452986B (en) * | 2013-08-08 | 2015-11-04 | 贵州航天精工制造有限公司 | A kind of light antifatigue self-locking nut and manufacture method thereof |
| CN105156445A (en) * | 2015-10-20 | 2015-12-16 | 贵州航天精工制造有限公司 | Double-lug spherical multifunctional hi-lock nut |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20160808 |