CN105299018A - Anti-looseness and anti-corrosion device for threaded connection - Google Patents
Anti-looseness and anti-corrosion device for threaded connection Download PDFInfo
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- CN105299018A CN105299018A CN201410319644.7A CN201410319644A CN105299018A CN 105299018 A CN105299018 A CN 105299018A CN 201410319644 A CN201410319644 A CN 201410319644A CN 105299018 A CN105299018 A CN 105299018A
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- nut
- fastening
- loose
- bent part
- thread
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- 238000005260 corrosion Methods 0.000 title abstract description 6
- 239000002184 metal Substances 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 10
- 239000003292 glue Substances 0.000 abstract description 24
- 238000009434 installation Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000012080 ambient air Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 7
- 235000011613 Pinus brutia Nutrition 0.000 description 7
- 241000018646 Pinus brutia Species 0.000 description 7
- 244000098674 Pinus cembroides Species 0.000 description 4
- 235000005013 Pinus cembroides Nutrition 0.000 description 4
- 235000008591 Pinus cembroides var edulis Nutrition 0.000 description 4
- 235000015593 Pinus monophylla Nutrition 0.000 description 4
- 235000015594 Pinus parryana Nutrition 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000001149 cognitive effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses an anti-looseness and anti-corrosion device for threaded connection. Especially after thread glue is used, a screw nut and a threaded connection part of the screw nut are isolated from ambient air, so that corrosion is avoided. A bent part of a lower stop arm of the device abuts against the surface of the contour wall of thread fastening equipment, and the bent part serves as a wrench which works permanently and provides locking torque for limiting the rotation of the nut. An upper stop arm of the device is bent along the outer surface of an upper nut, and the bent part is made to abut against the contour of the upper nut, so that the looseness and disengagement of the upper nut are limited; meanwhile, the bent part is coated with the thread glue, so that the bent part is prevented from being corroded. In the aspect of code of conduct of operation, the one-time installation behavior of misoperation is avoided, and installation is completed only by conducting fastening twice; during detection, a torque wrench is not needed at all, and whether the screw nut is loosened or not can be learned only through observation by naked eyes.
Description
Technical field
The invention belongs to nonstandard mechanical design field.
Background technique
Nowadays, in engineering, generally use and be threaded.In order to prevent loosening of nut, design will according to mechanical design handbook in producing, selection standard lock washer, lock washer, elastic washer, or the standard of employing double nut is fastening.
In order to not get loose after fastening nuts, often do not use by widely cognitive spring lock washer in important events.Especially in vibration environment, the fastening middle use spring lock washer of single nut is when pretightening force is larger, and spring lock washer can produce plastic deformation, makes pretension occur the phenomenon of " relaxing ".
The stone bolt of China Express Railway sound barrier, use expensive, Sweden famous loosen packing ring (Nairoku-lock), but still there is thread looseness; And then use again double nut " to top " mechanism locking fastening at this washer that loosens., because the occasion in vibration uses, also there is the phenomenon of " relaxing " in loosening packing ring (Nairoku-lock) and producing plastic deformation of upper and lower two panels combination.
Conventional double nut fastening structure makes bolt tension and nut pressurized in the section of screwing, and forms that scyewed joint is secondary longitudinally compresses (screw thread locking), is applicable to low-speed heave-load or the stable occasion of load, engineering is called " screw thread locking ".But, wait environment at the high-speed railway subgrade of load vibration or bridge, be very easy to cause scyewed joint secondary loosening.
In addition, in low-speed heave-load or the stable occasion of load, double nut make to produce in screw pair not with external load change additional pressure, always and have friction torque, the relative screws of nut can be prevented; Wherein, because mechanical vibration cause pressure surge when single nut is fastening, and after using double nut, when upwards vibrating nut below, what can recline on the contrary is tighter, and when vibrating nut above downwards, reclining also can be tighter, maintains total load constant all the time.
Two frictional force faces are produced during pairs of anti-loose nut:
First frictional force face is between nut and fastener;
Second frictional force face is between nut and nut.
During installation, owing to being the nut holding out against the inside with the nut tightening outside, therefore the nut of outside can suitably thicken to bear larger moment of torsion, namely implements the thickness that the stressed upper cap nut in the second frictional force face will use larger, this respect is made mistakes in engineering practice of being everlasting, and upper cap nut is used thin.
It should be emphasized that: after tightening upper cap nut, on lower nut screw thread, suffered stress will reduce, and this is also to select thin nut as a major reason of lower nut.
In application, the pretightening force in usual first frictional force face is 80% of the second frictional force face pretightening force.When the effect of shock and vibration load, the frictional force in the first frictional force face can reduce or disappear; Meanwhile, the first nut is compressed and causes the frictional force in the second frictional force face to strengthen further.
In technical requirements, in order to load suitable pretightening force to bolt before generation screw thread locking phenomenon, need to select the 25%-50% of total screw-down torque as under the pre-fastening moment of (first) nut; Use 100% screw-down torque tighten upper cap nut, that is, carry out twice fastening.
In using, when nut occurs that pine moves back factor, the first frictional force and the second frictional force must be overcome.This in low-speed heave-load or the stable occasion of load, because while the first frictional force reduction, the second frictional force can increase, be the basic reason of locking effect.
So the anti-loosing effect of double nut (double nut) is more than 5 times of ordinary elasticity packing ring in theory.
In recent years, under some vibration environments, the threaded connection pair of mechanism widely uses screw thread glue.But the technician of most mechanical major, even some experts, think the braking of automobile, bicycle, dependence be frictional force.In fact, frictional force brakes, must implement at the large rough surface of friction factor, but the rubber brake rubber block of bicycle corresponding be smooth rim.In fact, braking relies on rubber brake rubber block and smooth rim to occur that vacuum is carried out.Be threaded after using screw thread glue, be that " friction torque " is become " vacuum moment ", significantly improve locking effect.
Hidden danger of quality
(1) owing to using double nut to need " twice fastening ", cause many operator to seek and save trouble, two nuts are stacked and once tightens, source has manufactured hidden danger of quality;
(2) in fastener cycle, owing to using metal tools, force comparatively large, inevitably cause material surface breakage and occur cut, when being exposed to air ambient use, just there will be corrosion;
(3) when the environment of the vibration of foundation uses double nut fastening, even if nut loosens, but only with visually observing, detecting without torque spanner, do not know whether nut really loosens;
(4) sound barrier especially on viaduct, the fastening nut of both sides is separated by sound system, and the nut in outside be can't see at all, cannot detect whether it loosens.
Summary of the invention
The present invention discloses a kind of thread connection anti-loose, anti-corrosive apparatus, especially uses after screw thread glue, fastening nut and threaded joints thereof is divided isolatedly to contact with ambient air, avoid corroding; Meanwhile, owing to applying stop moment mechanism, as provided a fixing spanner, forever stoping the rotation of nut, preventing loosening of fastening nut; And in operation behavior specification, evaded misoperation, must carry out twice fastening, just can complete installation; During detection, do not need torque spanner, only with naked eyes viewing, just can know whether nut loosens.
" friction torque " becomes on the basis of " vacuum moment " at use screw thread glue by the present invention, prevents further in vibration environment use, and nut gets loose phenomenon, and feature is:
(1) helical thread portion of first nut is evenly coated screw thread glue, also evenly coat screw thread glue on the bolt thread surface coordinated simultaneously, then to screw on nut, after thread joint face is fastening, the outer surface of first nut is also evenly coated screw thread glue, use " thread connection anti-loose, anti-corrosive apparatus " of the present invention, through bolt, first nut after fastening is fastened completely.
What need adjustment is that the dogleg section of stopper lever under " thread connection anti-loose, anti-corrosive apparatus " is close to the contour edge of screw tightening equipment, and its bending as the spanner of a forever job, will provide stop moment, the rotation of restriction nut.
In the structure of " thread connection anti-loose, anti-corrosive apparatus ", need the Spielpassung ensureing to carry out slightly interference between the nut profile be fastened, the degree of depth will be slightly less than the thickness of nut.
(2) by the upper surface of second fastening nuts to " thread connection anti-loose, anti-corrosive apparatus ", unnecessary screw thread glue is extruded from the connection gap of metal sleeve and first nut, first nut is sealed completely by screw thread glue; The elasticity that when utilizing the hollow metal sleeve impact briquetting of " thread connection anti-loose, anti-corrosive apparatus ", areal stretch occurs simultaneously, plays the effect of spring lock washer.
(3) after second nut being fastened to " thread connection anti-loose, anti-corrosive apparatus " upper surface by the requirement of screw-down torque, the upper stopper lever of " thread connection anti-loose, anti-corrosive apparatus " is carried out bending along upper cap nut outer surface, dogleg section is made to be close to the profile of second nut, limit getting loose of this nut, use screw thread glue to be coated in dogleg section simultaneously, avoid dogleg section corrosion.
The effect of upper stopper lever when stopping on hill, fills in a small cushion block under wheel, the downslide of restricting vehicle as automobile.
(4) in operation behavior specification, must carry out twice fastening, just can complete installation, evaded misoperation behavior occur possibility.
(5), when stopper lever dogleg section is close to the contour edge of fastening apparatus, its structure can play the effect of " mark ".When detecting, as long as whether the part of observing upper and lower stopper lever bending is launched, and whether the mark of the part of observation and bending moves, and just knows whether nut loosens.Because only when nut loosening, the part of stopper lever bending could be launched after stress deformation.
The mechanism that structure is locking
In load vibration occasion, nut pine moves back and first will overcome the first frictional force and the second frictional force.And structure ensures the existence of this frictional force, be to make the eternal locking of nut, do not produce the oblique prone slipping mechanism measure of threadingly lift angle.
For this reason, " thread connection anti-loose, anti-corrosive apparatus " of the present invention is based upon application screw thread glue sealing locking screw thread, isolated air ambient, and " friction torque " become " vacuum moment ", Structure Mechanism is:
A. utilize " thread connection anti-loose, anti-corrosive apparatus " can be fixed at link position by bolts and nuts at guarantee screw thread glue, prevent the trend of threadingly inclined-plane downslide when nut pine moves back, to greatest extent by nut locking in position simultaneously;
B. move back motion be for limiting nut pine under vibration environment: as long as itself set up the relation of power arm and resistance arm to this loose withdrawing nut, resistance arm when pine is moved back is greater than the power arm of nut, and by the end lock stop of resistance arm, as same back-up wrench, the pine limiting nut moves back, and can limit nut pine and move back;
C. the second frictional force face owing to being formed by fixing screw-down torque between double nut employs screw thread glue and fixes, now, concerning the nut in the first frictional force face that fastener is exerted pressure, to move back along the slope of thread pine of bolt, must overcome the fixing screw-down torque of screw thread glue between double nut (for single nut screwing clamping, be less than screw-down torque can pine move back);
D. in use, must accomplish that (first) nut in the first frictional force face is after use screw thread glue, fastening by the 25%-50% of total screw-down torque; Then the outer surface of this nut evenly to be coated screw thread glue, buckle " thread connection anti-loose, anti-corrosive apparatus ", then tighten upper cap nut by the screw-down torque of 100%, realize top, also will ensure the locking plate of stopper lever at fixing stop surface by tight;
E. usual, when realizing top by screw-down torque, be threaded about 80% active force consumption between connecting thread, the active force holding out against face only has about 20%, the lower nut fixed by screw thread glue and resistance arm can not produce to upper cap nut the factor of loosening, and fixing upper cap nut forms effective resistance to lower nut, restriction lower nut upwards loosens; Now, the screw-down torque that lower nut rotates up and Tightening moment balance, if force to loosen the outer arm detent pad with lower nut one, equal lower nut relatively-stationary upper cap nut surface and carry out fastening;
F. the double nut of " thread connection anti-loose, anti-corrosive apparatus " is the reason that top mechanism can be suitable for vibration environment: after applying outer arm stop metal sleeve between double nut, button pad both side surface can produce resiliently deformable when extruding, and plays the effect being equivalent to a spring pad; The moment of fastening rear (being less than screw-down torque) when to force pine to move back with the moment of outer arm detent pad of lower nut one be not single nut loosening, the screw-down torque to top must be greater than, move back direction along pine to continue to force to carry out fastening to upper cap nut, extruding force, stress between screw thread will be increased, and increase the moment of outer arm detent pad stopper lever simultaneously, until resistance arm locking plate cracking or screw thread strip button, screw-down torque is now the data of inspection resistance arm extreme damage power.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is the three-dimensional CAD shaft side figure of thread connection anti-loose, anti-corrosive apparatus;
Front view when Fig. 2 is thread connection anti-loose, anti-corrosive apparatus using state;
Fig. 3 is the worm's eye view of thread connection anti-loose, anti-corrosive apparatus;
Fig. 4 is the installation order of connection view of thread connection anti-loose, anti-corrosive apparatus;
Fig. 5 is thread connection anti-loose, anti-corrosive apparatus installs the view after connecting.
In figure:
(1) be with the hollow metal sleeve of central shaft hole, (2) are lower stopper lever, stopper lever dogleg section under (3), (4) upper stopper lever dogleg section, the base of (5) threaded fastening device, (6) lower nut, (7) upper cap nut, material thickness is H, and the degree of depth is C, nut thickness B, hexagon nut diagonal is D, tightening face width degree is E, and lower stopper lever distance is F, and bolt spiral shell diameter is d.
Embodiment
1. first at the stone bolt thread surface uniform application screw thread glue that diameter is d, then by the lower nut (6) of thread surface uniform application screw thread glue by the upper surface of fastening foundation bolt in base (5).Wherein, the hollow metal sleeve monnolithic case of " thread connection anti-loose, anti-corrosive apparatus " is the same with nut profile, after cover upper cap nut, have the gap slightly larger than interference fit, ensures that fastening is smooth and easy.
2. to note when being with the hollow metal cover (1) of central shaft hole to be fastened by lower nut (6): lower stopper lever dogleg section (3) is close to the contour edge in threaded fastening device base (5), wherein, the hollow depth of hollow metal sleeve (1) is less than the thickness of lower nut (6).
3. the outer surface of lower nut (6) is evenly coated screw thread glue, then buckle " thread connection anti-loose, anti-corrosive apparatus ".
4. upper cap nut (7) is fastened to the upper surface of hollow metal cover (1), now, screw thread glue is enable to extrude from the connection gap of hollow metal sleeve (1), ensure to seal up lower nut (6) surface completely.Now, the dogleg section (3) of stopper lever under " thread connection anti-loose, anti-corrosive apparatus " is close to the contour edge of screw tightening equipment, its bending as the spanner of a forever job, will provide stop moment, the rotation of restriction nut.
5. the upper stopper lever (4) hollow metal cover (1) stretched originally, to upper cap nut (7) outer surface bending, and be close to as far as possible, limit getting loose of upper cap nut, then at the bending surface smear screw thread glue of upper stopper lever (4), realize, with the isolation of working environment, avoiding corrosion;
6., in operation behavior specification, evaded misoperation, must carry out twice fastening, just can complete installation;
7., when detecting, as long as whether stopper lever dogleg section (3) and upper stopper lever dogleg section (4) are launched under observing, or whether the part marker of observation and bending moves, and just knows whether tightening nut loosens.
When especially suspecting whether the tightening nut of the sound barrier outside on viaduct loosens, whether the dogleg section just seeing stopper lever on the ground of standing changes, do not detect with torque spanner, just can know the partly whether reliable operation that is threaded of sound barrier base with naked eyes.
Claims (2)
1. thread connection anti-loose, an anti-corrosive apparatus, is characterized in that: structure has the same with nut profile, and the hollow metal sleeve of band central shaft hole, can pass bolt, be fastened completely by nut.
2. a kind of thread connection anti-loose according to claim 1, anti-corrosive apparatus, is characterized in that: the hollow metal sleeve surface of band central shaft hole has the stopper lever of upper and lower two bands bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410319644.7A CN105299018A (en) | 2014-07-07 | 2014-07-07 | Anti-looseness and anti-corrosion device for threaded connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410319644.7A CN105299018A (en) | 2014-07-07 | 2014-07-07 | Anti-looseness and anti-corrosion device for threaded connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105299018A true CN105299018A (en) | 2016-02-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410319644.7A Pending CN105299018A (en) | 2014-07-07 | 2014-07-07 | Anti-looseness and anti-corrosion device for threaded connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105299018A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015269A (en) * | 2016-06-08 | 2016-10-12 | 四川德远新材料有限公司 | Corrosion preventing method for bolts |
| CN106089940A (en) * | 2016-05-31 | 2016-11-09 | 国家电网公司 | A kind of stator bottom bracket axle bolt lock ingot device |
| CN108488196A (en) * | 2018-07-12 | 2018-09-04 | 潍坊毅恒机械有限公司 | A kind of combination detachable transport box equipment fixed structure |
| CN110118222A (en) * | 2019-06-04 | 2019-08-13 | 广东览讯科技开发有限公司 | A kind of spacer for bolt preventing rotation |
| CN111173827A (en) * | 2020-01-21 | 2020-05-19 | 燕山大学 | Double-thread anti-loosening structure and double-thread anti-loosening method |
| CN113818340A (en) * | 2020-06-19 | 2021-12-21 | 中国铁路设计集团有限公司 | A bridge expansion device |
| CN115921030A (en) * | 2022-12-30 | 2023-04-07 | 浙江林川机械制造有限公司 | Portable feeding machine |
| JP7571650B2 (en) | 2021-04-01 | 2024-10-23 | 日産自動車株式会社 | Vehicle fastening structure |
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| CN2132019Y (en) * | 1992-03-28 | 1993-05-05 | 叶中午 | Combined lock pad for screw fastening |
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| CN201339637Y (en) * | 2008-11-28 | 2009-11-04 | 武昌船舶重工有限责任公司 | Nut fastener device |
| CN103912563A (en) * | 2014-03-21 | 2014-07-09 | 刘科 | Anti-loosening fastener component |
| CN104214192A (en) * | 2013-05-30 | 2014-12-17 | 王鸿基 | Corrosion and looseness preventing device in threaded connection with road noise barrier |
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2014
- 2014-07-07 CN CN201410319644.7A patent/CN105299018A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB129553A (en) * | 1918-12-11 | 1919-07-17 | Ayer Pool | Lock Nut Washer. |
| CN2132019Y (en) * | 1992-03-28 | 1993-05-05 | 叶中午 | Combined lock pad for screw fastening |
| CN2334935Y (en) * | 1998-07-15 | 1999-08-25 | 王小敏 | Universal check joint device |
| JP2002242919A (en) * | 2001-02-20 | 2002-08-28 | Masataka Ishii | Bolt/nut tightening tool |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089940A (en) * | 2016-05-31 | 2016-11-09 | 国家电网公司 | A kind of stator bottom bracket axle bolt lock ingot device |
| CN106089940B (en) * | 2016-05-31 | 2018-07-06 | 国家电网公司 | A kind of guide vane bottom bracket axle bolt locking device |
| CN106015269A (en) * | 2016-06-08 | 2016-10-12 | 四川德远新材料有限公司 | Corrosion preventing method for bolts |
| CN108488196A (en) * | 2018-07-12 | 2018-09-04 | 潍坊毅恒机械有限公司 | A kind of combination detachable transport box equipment fixed structure |
| CN110118222A (en) * | 2019-06-04 | 2019-08-13 | 广东览讯科技开发有限公司 | A kind of spacer for bolt preventing rotation |
| CN111173827A (en) * | 2020-01-21 | 2020-05-19 | 燕山大学 | Double-thread anti-loosening structure and double-thread anti-loosening method |
| CN113818340A (en) * | 2020-06-19 | 2021-12-21 | 中国铁路设计集团有限公司 | A bridge expansion device |
| JP7571650B2 (en) | 2021-04-01 | 2024-10-23 | 日産自動車株式会社 | Vehicle fastening structure |
| CN115921030A (en) * | 2022-12-30 | 2023-04-07 | 浙江林川机械制造有限公司 | Portable feeding machine |
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Application publication date: 20160203 |
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