CN103216513A - Anti-loose internally threaded fastener - Google Patents
Anti-loose internally threaded fastener Download PDFInfo
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- CN103216513A CN103216513A CN2013101216795A CN201310121679A CN103216513A CN 103216513 A CN103216513 A CN 103216513A CN 2013101216795 A CN2013101216795 A CN 2013101216795A CN 201310121679 A CN201310121679 A CN 201310121679A CN 103216513 A CN103216513 A CN 103216513A
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Abstract
The invention relates to an anti-loose internally threaded fastener, which comprises an internal thread substrate, and is characterized in that the shape of an internal thread arranged on the internal thread substrate is as follows: the oblique angle of an internal thread profile is 38 degrees to 40 degrees, the intermediate diameter D2 = D-(0. 42 to 0.43) P, the variable angle inflection point diameter phiD = D-(0.48 to 0.50)P, the minor diameter D1 = D-(0.90 to 0.91) P, the theoretical interference width is 0.12B, the theoretical interference height is 0.22Td, the failure theoretical distance is 0.098P, the intermediate diameter position is 0.215P, and the inflection point position is 0.24P. By improving the design parameters of the thread, and connecting the internal thread with six-level machining precision and an ordinary external thread with six-level machining precision, the mechanical properties of a thread pair are greatly improved, the contact stress of the thread pair is reduced, the plastic deformation of an external thread profile crest zone is reduced, the overloading assembly ability is strong, the anti-loose reliability is good, no interference occurs in a limit size state, the rotation following phenomenon is avoided, and the assembly quality and efficiency are high.
Description
Technical field
The present invention relates to fastener areas, is a kind of locking internal thread fastening piece that is widely used in automobile, construction machinery industry.
Background technique
Open (bulletin) number CN202560774U of Chinese patent discloses the applicant, and name is called: the utility model patent of " locking internal thread fastening piece ".This locking internal thread fastening piece is that internal screw thread form is set on the internal thread matrix is middle footpath D
2=D-0.416P, oblique angle flex point diameter phi D=D-0.4646P, path D
1=D-0.85P, theoretical interference width is 0.25B, and theoretical the interference highly is 0.25Td, and the theory of failure distance is 0.090P, and internal thread thread form oblique angle X=36 °, in the formula: P is a pitch, and B is that the outside thread crest is wide, and Td is the big footpath of an outside thread tolerance, TD
2Be footpath tolerance in the internal thread.Footpath tolerance TD in described
2Be 6 class precisions.Described path tolerance TD
1For
This locking internal thread fastening piece and existing code name are that the spiral self-locking screw thread of SPL is compared, and its anti-loosing effect obviously improves.But, in use find in succession under the limit size state, to occur interfering, transfer phenomenon is arranged individually, influence assembly quality and efficient, it is reasonable inadequately to exist design parameter, not considering more accurately promptly will have anti-loosening property reliably, reduces contact stress again, reduces the plastic deformation of outside thread tooth top, and then raising internal thread intensity, assembling under the constant condition of moment of torsion, obtain bigger primitive axis power, be more suitable for the characteristics of automobile, the assembling of construction machinery industry production line.
Summary of the invention
The objective of the invention is, the internal thread design parameter of prior art is carried out substantial improvements, and by a large amount of repeatedly experimental verifications, provide a kind of design parameter more reasonable, reliable anti-loosening property is promptly arranged, reduce contact stress again, reduce the district's plastic deformation of outside thread crest; Improve internal thread intensity, move to make under the limit size state not have by axial position and interfere, can avoid transfer phenomenon to take place, assembly quality and efficient height, under the constant condition of assembling moment of torsion, obtain bigger initial axial force, more can satisfy the locking internal thread fastening piece of automobile, construction machinery industry production line assembling needs.
The objective of the invention is to realize by following technological scheme: a kind of locking internal thread fastening piece, it comprises the internal thread matrix, it is characterized in that, the internal screw thread form that is provided with on the internal thread matrix is: internal thread thread form oblique angle 38o～40o, middle footpath D
2=D-(0.42～0.43) P, oblique angle flex point diameter phi D=D-(0.48～0.50) P, path D
1=D-(0.90～0.91) P, theoretical interference width is 0.12B, and theoretical the interference highly is 0.22Td, and the theory of failure distance is 0.098P, middle path position is 0.215P, and corner position is 0.24P, and in the formula: P is a pitch, B is that the outside thread crest is wide, and Td is the big footpath of an outside thread tolerance, TD
2Be footpath tolerance in the internal thread.
A kind of locking internal thread fastening piece of the present invention and the applicant, name is called: " locking internal thread fastening piece " compared, and by improving the screw thread design parameter, increases internal thread thread form oblique angle, footpath D in suitably reducing
2, oblique angle flex point diameter phi D, path D
1, reduce theoretical width, the theoretical height of interfering of interfering, suitably increase theory of failure distance, middle path position and corner position, keep the middle footpath tolerance TD of 6 class precisions
2With
, path tolerance TD
1The internal thread of 6 grades of machining accuracies of employing is connected the mechanical property that just screw thread is paid with the common outside thread of 6 grades of machining accuracies and is improved significantly, it is little to make screw thread pay contact stress, reduce the district's plastic deformation of outside thread crest, the overload assemble ability is strong, locking good reliability, under the limit size state, do not have and interfere, can avoid transfer phenomenon to take place, assembly quality and efficient height, under the constant condition of assembling moment of torsion, obtain bigger initial axial force, more can satisfy the needs of automobile, the assembling of construction machinery industry production line.Also have easy processing, the yield rate height, manufacturing cost and use cost is lower, and the internal thread manufacturing expense can descend more than 50%, and use is extensive, the life-span is long, advantages such as Security height.
Description of drawings
Fig. 1 is a kind of locking internal thread fastening piece of the present invention and common outside thread linkage structure schematic representation.
Embodiment
The invention will be further described to utilize drawings and Examples below.
With reference to Fig. 1, a kind of locking internal thread fastening piece comprises the internal thread matrix, and the internal screw thread form that is provided with on the internal thread matrix is: when internal thread thread form oblique angle is 38o, wherein the footpath D
2=D-0.42P, oblique angle flex point diameter phi D=D-0.48P, path D
1=D-0.90P, theoretical interference width is 0.12B, and theoretical the interference highly is 0.22Td, and the theory of failure distance is 0.098P, and middle path position is 0.215P, corner position is 0.24P; When internal thread thread form oblique angle is 40o, middle footpath D
2=D-0.43P, oblique angle flex point diameter phi D=D-0.50P, path D
1=D-0.91P, theoretical interference width is 0.12B, and theoretical the interference highly is 0.22Td, and the theory of failure distance is 0.098P, and middle path position is 0.215P, corner position is 0.24P.
In the formula: P is a pitch, and B is that the outside thread crest is wide, and Td is the big footpath of an outside thread tolerance, TD
2Be footpath tolerance in the internal thread.
Footpath tolerance TD in the internal thread
2Be 6 class precisions, path tolerance TD
1For
During use, internal thread and common outside thread connect and compose checknut and pay.A kind of locking internal thread fastening piece of the present invention is for having internal thread part, nut; Common outside thread 1 is the outside thread of existing 6 grades of machining accuracies, is related domain bolt, screw rod commonly used.
Specific embodiment 1-8 sees Table 1: each Wei ㎜ of parameter unit, internal thread thread form oblique angle is 38o
Specific embodiment 9-16 sees Table 2: each Wei ㎜ of parameter unit, internal thread thread form oblique angle is 40o
Table 3: frictional behaviour experiment
Finish by German SCHATZ bolt fastener analytical system (2000N.m) test
Experimental standard GB/T6823.3 bolt fastener is tightened experiment
| Nr | Total torque 1Nm | Axle power 1kN | Total friction factor 1 | Screw thread friction factor 1 | Supporting surface friction factor 1 | Screw thread moment of torsion 1Nm | Supporting surface moment of torsion 1Nm | Torque coefficient 1 |
| 1 | 880.17 | 236.68 | 0.11 | 0.09 | 0.13 | 332.55 | 547.62 | 0.15 |
| 2 | 880.17 | 222.28 | 0.12 | 0.10 | 0.13 | 358.69 | 521.48 | 0.16 |
| 3 | 880.27 | 247.16 | 0.11 | 0.10 | 0.11 | 373.47 | 506.79 | 0.15 |
| 4 | 880.17 | 242.83 | 0.11 | 0.09 | 0.12 | 348.18 | 531.99 | 0.15 |
| 5 | 880.47 | 255.13 | 0.10 | 0.09 | 0.11 | 370.13 | 510.35 | 0.14 |
| 6 | 880.06 | 237.81 | 0.11 | 0.09 | 0.13 | 339.88 | 540.19 | 0.15 |
| 7 | 880.06 | 246.42 | 0.11 | 0.09 | 0.12 | 354.73 | 525.33 | 0.15 |
| 8 | 880.06 | 215.54 | 0.12 | 0.10 | 0.14 | 336.40 | 543.66 | 0.17 |
| 9 | 880.27 | 233.70 | 0.11 | 0.10 | 0.13 | 352.26 | 528.01 | 0.16 |
| 10 | 880.27 | 260.54 | 0.10 | 0.09 | 0.11 | 364.03 | 516.24 | 0.14 |
| 11 | 880.27 | 250.72 | 0.10 | 0.10 | 0.11 | 386.00 | 494.27 | 0.15 |
| 12 | 880.17 | 250.16 | 0.10 | 0.09 | 0.12 | 348.87 | 531.3 | 0.15 |
| 13 | 880.17 | 240.66 | 0.11 | 0.09 | 0.12 | 351.48 | 528.68 | 0.15 |
| 14 | 880.06 | 245.51 | 0.11 | 0.09 | 0.12 | 336.33 | 543.74 | 0.15 |
| 15 | 880.06 | 246.86 | 0.11 | 0.10 | 0.11 | 376.07 | 503.99 | 0.15 |
| 16 | 880.27 | 255.20 | 0.10 | 0.09 | 0.11 | 374.55 | 505.72 | 0.14 |
| 17 | 880.17 | 242.92 | 0.11 | 0.10 | 0.12 | 371.45 | 508.72 | 0.15 |
| 18 | 880.27 | 271.39 | 0.10 | 0.08 | 0.11 | 364.85 | 515.42 | 0.14 |
| 19 | 880.27 | 248.53 | 0.11 | 0.09 | 0.12 | 362.47 | 517.8 | 0.15 |
| 20 | 880.06 | 244.94 | 0.11 | 0.09 | 0.12 | 344.16 | 535.91 | 0.15 |
Table 4: statistics
| Subsequence #1n=20 | Total torque 1Nm | Axle power 1kN | Total friction factor 1 | Screw thread friction factor 1 | Supporting surface friction factor 1 | Screw thread moment of torsion 1Nm | Supporting surface moment of torsion 1Nm | Torque coefficient 1 |
| X | 880.19 | 244.75 | 0.11 | 0.09 | 0.12 | 357.33 | 522.86 | 0.15 |
| R | 0.41 | 55.85 | 0.03 | 0.02 | 0.03 | 53.45 | 53.35 | 0.03 |
| V | 0.01 | 5.04 | 5.54 | 5.68 | 7.13 | 4.27 | 2.9 | 5.17 |
| Min | 880.06 | 215.54 | 0.10 | 0.08 | 0.11 | 332.55 | 494.27 | 0.14 |
| Max | 880.47 | 271.39 | 0.12 | 0.10 | 0.14 | 386.00 | 547.62 | 0.17 |
The sampling part M24 * 1.5-10 nut of a kind of locking internal thread fastening piece of the present invention is connected with M24 * 1.5 * 110-8.8CA plain bolt, specify feeler mechanism-mechanical industry spare part in common use product quality supervision inspection center to test on peace cloth internal medicine transverse vibration testing machine through country, axle power and mounting torque all satisfy usage requirement.
The embodiment of a kind of locking internal thread fastening piece of the present invention only is limited embodiment, and non exhaustive, and those skilled in the art still belong to the scope that claim of the present invention is protected without former simple copy of creative work and improvement.
Claims (1)
1. locking internal thread fastening piece, it comprises the internal thread matrix, it is characterized in that, the internal screw thread form that is provided with on the internal thread matrix is: internal thread thread form oblique angle 38o～40o, middle footpath D
2=D-(0.42～0.43) P, angle flex point diameter phi D=D-(0.48～0.50) P, path D
1=D-(0.90～0.91) P, theoretical interference width is 0.12B, and theoretical the interference highly is 0.22Td, and the theory of failure distance is 0.098P, middle path position is 0.215P, and corner position is 0.24P, and in the formula: P is a pitch, B is that the outside thread crest is wide, and Td is the big footpath of an outside thread tolerance, TD
2Be footpath tolerance in the internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101216795A CN103216513A (en) | 2013-04-10 | 2013-04-10 | Anti-loose internally threaded fastener |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101216795A CN103216513A (en) | 2013-04-10 | 2013-04-10 | Anti-loose internally threaded fastener |
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| CN103216513A true CN103216513A (en) | 2013-07-24 |
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| CN2013101216795A Pending CN103216513A (en) | 2013-04-10 | 2013-04-10 | Anti-loose internally threaded fastener |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439557A (en) * | 2014-10-30 | 2015-03-25 | 上海电气集团上海电机厂有限公司 | Bearing bolt thread fit control method |
| WO2017021858A1 (en) * | 2015-07-31 | 2017-02-09 | Infastech Intellectual Properties Pte Ltd | Threaded fastener |
| CN111288068A (en) * | 2018-12-06 | 2020-06-16 | 苏州迈特科技有限公司 | Interference type anti-loose self-locking structural part |
| WO2025103275A1 (en) * | 2023-11-13 | 2025-05-22 | 中船海为高科技有限公司 | Non-equidistant anti-loosening threaded connection pair |
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| US4076064A (en) * | 1975-10-08 | 1978-02-28 | Holmes Horace D | Locking thread construction |
| US4171012A (en) * | 1975-11-25 | 1979-10-16 | Holmes Horace D | Locking thread construction |
| US4586861A (en) * | 1978-11-06 | 1986-05-06 | Microdot Inc. | Convex wedge ramp thread configuration |
| CN201679838U (en) * | 2010-05-24 | 2010-12-22 | 庄众心 | Anti-loosening internal thread connecting piece |
| CN102650314A (en) * | 2012-05-07 | 2012-08-29 | 吉林市翔达电动车厂 | Internally threaded check fastener |
| CN202510524U (en) * | 2012-03-23 | 2012-10-31 | 河南伟瑞科技实业有限公司 | Novel locking bolt |
| CN202560774U (en) * | 2012-05-07 | 2012-11-28 | 吉林市翔达电动车厂 | Locking internal-threaded fastener |
| CN203201984U (en) * | 2013-04-10 | 2013-09-18 | 吉林市翔达电动车厂 | Anti-loosing internal screw thread fastener |
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2013
- 2013-04-10 CN CN2013101216795A patent/CN103216513A/en active Pending
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| US4076064A (en) * | 1975-10-08 | 1978-02-28 | Holmes Horace D | Locking thread construction |
| US4171012A (en) * | 1975-11-25 | 1979-10-16 | Holmes Horace D | Locking thread construction |
| US4586861A (en) * | 1978-11-06 | 1986-05-06 | Microdot Inc. | Convex wedge ramp thread configuration |
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| CN202510524U (en) * | 2012-03-23 | 2012-10-31 | 河南伟瑞科技实业有限公司 | Novel locking bolt |
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| 刘利剑: "《车工入门必读》", 31 May 2011, 机械工业出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439557A (en) * | 2014-10-30 | 2015-03-25 | 上海电气集团上海电机厂有限公司 | Bearing bolt thread fit control method |
| WO2017021858A1 (en) * | 2015-07-31 | 2017-02-09 | Infastech Intellectual Properties Pte Ltd | Threaded fastener |
| CN107923428A (en) * | 2015-07-31 | 2018-04-17 | 英法斯泰克知识产权私人有限公司 | Threaded fastener |
| US10197086B2 (en) | 2015-07-31 | 2019-02-05 | Infastech Intellectual Properties Pte. Ltd | Threaded fastener |
| AU2016303475B2 (en) * | 2015-07-31 | 2020-07-02 | Infastech Intellectual Properties Pte Ltd | Threaded fastener |
| CN111288068A (en) * | 2018-12-06 | 2020-06-16 | 苏州迈特科技有限公司 | Interference type anti-loose self-locking structural part |
| WO2025103275A1 (en) * | 2023-11-13 | 2025-05-22 | 中船海为高科技有限公司 | Non-equidistant anti-loosening threaded connection pair |
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Application publication date: 20130724 |