CN201944075U - Self-tightening check nut - Google Patents
Self-tightening check nut Download PDFInfo
- Publication number
- CN201944075U CN201944075U CN 201120062207 CN201120062207U CN201944075U CN 201944075 U CN201944075 U CN 201944075U CN 201120062207 CN201120062207 CN 201120062207 CN 201120062207 U CN201120062207 U CN 201120062207U CN 201944075 U CN201944075 U CN 201944075U
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- Prior art keywords
- nut
- thread
- pitch
- standard
- screw
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 230000000694 effects Effects 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 7
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/30—Locking exclusively by special shape of the screw-thread
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
- Connection Of Plates (AREA)
Abstract
The utility model discloses a self-tightening check nut, wherein the screw pitch of screw threads of the nut is less than or greater than the screw pitch of the screw threads of a standard nut in the same specification; the screw pitch difference between the nut and the standard nut is 1% to 6% of the screw pitch of the standard nut; the screw pitch difference between the screw pitch of the nut and a matching bolt exists, so that the screw pitch difference is accumulated gradually with the gradual screw-in of the nut when the nut is matched with the bolt, and extrusion force and anti-looseness torsional moment can be generated between threaded screwing surfaces, so that anti-looseness effect is achieved. The self-tightening check nut aims to provide the self-tightening check nut, in which any auxiliaries, auxiliary material or additional matching accessories are not needed, the structure is simple, the self-tightening check nut is convenient to use, the maneuverability is high, and the anti-looseness effect is good; and the self-tightening check nut can be widely applied to railways, bridges, turnout junctions, automobiles, machines and occasions that are positioned in vibration for a long time and need safe anti-looseness and fastening.
Description
Technical field
The utility model relates to a kind of fastening piece, and in particular, it relates to a kind of self tightening lock nut.
Background technique
Nut is current widely used fastening piece, normally is used with bolt.For the Dimensions of nut, formulating in the industry has detailed standard, and generally speaking, we use standard piece as far as possible, in the hope of the convenience in processing, buying and even the use.Nut anti-looseness is the problem that engineering circle is paid much attention to always, because nut gets loose and gently then causes product function to go down or lost efficacy, heavy then cause the collapse of engineering or device structure, and may directly cause serious accident, so nut anti-looseness matter now is big, be not sneezed at,, especially will take seriously nut anti-looseness as major issue in that these are related on the installations and facilities of personal safety as railroad track and automobile.The existing a lot of ways of people prevent that nut from getting loose at present, commonly used is to add auxiliary or auxiliary material, as install spring washer or floor clip, use back tightening nut additional, install cotter pin, fill screw thread glue or the like in addition, these methods have certain effect under average operating, but in the strong and frequent rugged environment of high temperature, humidity, vibratory impulse, on railroad track, locking functions is very easily forfeiture then, this class anti-loose method needs the cooperation of auxiliary auxiliary material in addition, has improved cost virtually.Also some scheme obtains the nut anti-looseness effect by the nut self structure being processed improve, for example, a kind of nut is arranged, screw tap processing with truncated section tapping cusp painstakingly draws, all stay a jut on every circle thread of nut, when cooperating with bolt, utilize the extruding force when pushing against between this jut and bolt thread face to come fastening and locking, but this nut, resistance is just bigger at the beginning of screwing with bolt, must all want omnidistance tool using from start to end, and can not that works tentatively screws earlier in placely with hand as plain nut, like this, when screwing, be easy to take place between nuts and bolt thread to not upper problem, cause cooperation crooked, can't be fastening.Notification number is that the utility model patent of CN86204074U discloses a kind of lock nut on July 22nd, 1987, this model utility comprises off-centre and has the convex lower nut of tapering and eccentric and have a spill upper cap nut of tapering, be equipped with the eccentric point that hinders on each nut, during nut screwing clamping, because eccentric structure effect, two nuts compress on the concavo-convex side face that is in contact with one another mutually, play locking effect.This model utility has stronger coupling mechanism force, and owing to interlocking, only need revolve one of them nut and get final product, and unlike common must be to revolving when jacking nut is locked, but this model utility need be processed into right supporting nut especially, structure is more than the standard piece complexity, manufacture cost is higher, manipulates inconvenience.
Summary of the invention
In order to overcome the cooperation of existing lock nut or too busy to get away auxiliary auxiliary material, or need special process mating parts, maybe need to process F-SP, cause complex structure, cost raises, and uses inconvenience, the defective of poor operability, the utility model provides a kind of self tightening lock nut, this nut need not any auxiliary auxiliary material or extra matching parts, and is simple in structure, easy to use, workable, anti-loosing effect is good.
The technical solution of the utility model is: a kind of self tightening lock nut, the pitch of its screw thread are less than the thread pitch of the standard nut of same size, and the pitch difference numerical value between described nut and the standard nut is 1% to 6% of standard nut pitch.When standard nut and standard bolt cooperate, the pitch of nut and the pitch of bolt equate, screwing of nut and bolt is lighter, up to the nuts and bolt head in the both sides of fastening object to entrance pressure when tight, the screw thread of nuts and bolt screws just can produce big extruding force between face, and before this, nut and bolt are Spielpassung all the time, thereby screw thread screws and almost do not have the mutual extrusion active force between face.Thread pitch of the present utility model has a mind to be processed into the thread pitch of the standard nut that is slightly less than same size, but available this nut and standard bolt be used, and screw-thread fit between the two in fact is not proper accurate cooperation.Though at the beginning of screwing, nuts and bolt still is Spielpassung each other, but after revolving the multi-turn screw thread, screw thread screws between face and will pitch difference be added up produced mutual extrusion power because of cooperating by force, but note man-hour the pitch difference between nut pitch and standard nut pitch is controlled on the suitable numerical value owing to add, fastener material itself has the certain elastic deformation ability in addition, therefore producing the extruding force initial stage, the extruding force that screw thread screws between face is smaller, still available hand screws nut, and this moment, nut changed transition fit into voluntarily with cooperating of bolt.Continue to screw then that pitch difference continues to add up, screw thread screws that extruding force further strengthens between face, and it is increasing to screw resistance, must can continue to screw by tool using at last, and the cooperation between nuts and bolt has at this moment changed interference fit into.After treating that nut integral body all is spun on the bolt, pitch difference no longer adds up, screw thread screws that extruding force just keeps constant between face, and to the nuts and bolt head after fastening object two side compressions, the value of this extruding force is just because of the reaction force that added fastening object and change to some extent.As fully visible, the difference of the utility model spare working principle and standard piece is, before bolt head and nut compress fastening object, screw thread screws between face and just has powerful extrusion force, just is this extruding force, and the screw thread face of screwing is compressed, produce locking moment of torsion, play locking effect.And this extruding force increases gradually, extremely small in the starting stage extruding force, this moment can be as using standard piece only to screw nut of the present utility model in place on bolt tentatively fast with hand-power, thread is found cooperation position accurately, finish the screw thread contraposition until nut and bolt, after not having the off normal possibility again, extruding force just progressively strengthens, screw nut until unrenewable hand-power, therefore use easily, very approaching with the standard piece usage, need tool using always after just nut all is spun on the bolt.Thereby promote in order to guarantee practicability of the present utility model with the supporting use of corresponding specification bolt standard piece and to be easy to, at thread profile, under the prerequisite of key element reference standard spares such as screw thread specification, the pitch difference numerical value between nut thread of the present utility model and the standard nut screw thread must be controlled in the reasonable range.Research draws, this pitch difference numerical value should be same size standard nut pitch 1% to 6%, have bigger Practical significance in this scope with interior numerical value.If the ratio of the standard nut pitch of this pitch difference numerical value and same size is lower than 1%, nut and bolt thread screw between face extruding force and locking moment of torsion too little, anti-loosing effect is not obvious; If greater than 6%, then screw thread screws between face extruding force and locking moment of torsion again can be too big, and operability is not strong.The utility model can be widely used in fields such as railway, bridge, vehicle and machinery.
As preferably, the thread turns of nut is that 3 circles are to 9 circles.Under the situation that pitch is determined, the multiple of the pitch difference that thread turns has added up after having determined nut integral body to screw on the bolt altogether.Beyond doubt nut is thick more in theory, and thread turns is many more, and the pitch difference of accumulation is also just many more, and it is also just big more that screw thread screws between face extruding force and locking moment of torsion, and anti-loosing effect is good more.If but thread turns is too much, cause locking moment of torsion excessive, big to operating, perhaps damaged screw, that has obviously just lost practical significance.So in processing during nut, the thread turns of nut is controlled at 3 circles to 9 these scopes of circle, can receive anti-loosing effect, have operability again.
As preferably, the screw thread of nut is a V thread screw.Triangle is the most frequently used tooth form of present fastener threads, therefore the thread of nut is made triangle, can be used with the bolt of mainstream system, thereby has better practicability.
As preferably, nut thread tooth form angle is 60 ° or 55 °.60 ° is the basic-profile angle of metric thread, and 55 ° is the basic-profile angle of inch screw thread, by the tooth form angle of standard processing nut thread, also is to be used with existing standard piece for convenience, makes nut have broad applicability.
The utility model also can adopt following another kind of technological scheme: a kind of self tightening lock nut, the pitch of its screw thread is greater than the thread pitch of the standard nut of same size, and the pitch difference numerical value between described nut and the standard nut is 1% to 6% of standard nut pitch.Thread pitch of the present utility model has a mind to be processed into the thread pitch of the standard nut that is slightly larger than same size, available this nut and standard bolt are used, after screwing, even nut also is not pressed on fastening object both sides with bolt head, screw thread screws between face also can produce mutual extrusion power because of pitch difference adds up, and and then produces locking moment of torsion.
The beneficial effects of the utility model are:
Need not the cooperation of any auxiliary auxiliary material or extra matching parts, only just can be locking with the self structure characteristics, therefore simple in structure, manufacturing cost and use cost is low;
Using method and standard piece using method are approaching, workable, easy to use;
By in the reasonable scope with crucial processing parameter control, can obtain powerful locking moment of torsion, anti-loosing effect is good.
Description of drawings
The utility model is described in further detail below in conjunction with the accompanying drawing specific embodiment.
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is a kind of sectional view of the present utility model;
Fig. 3 is the structure for amplifying schematic representation at A place among Fig. 2.
Among the figure, d-screw thread nominal diameter, d
1-minor diameter of thread, d
2-effective diameter of thread, α-thread profile angle, t-thread pitch, H-nut thickness.
Embodiment
Embodiment 1
As Fig. 1, Fig. 2 and shown in Figure 3, a kind of self tightening lock nut is provided with 7 and 3/10 circle screw thread, and the nut specification is coarse thread M24, minor diameter of thread d
1Be 20.90mm, effective diameter of thread d
2Be 22.30mm, screw thread nominal diameter d is 24.00mm, nut thread is a V thread screw, thread profile angle α is 60 °, thread pitch t is 2.95mm, compares with the pitch of the coarse thread M24 nut 3.00mm of standard, has the pitch difference of 0.05mm, this pitch difference numerical value is 1.76% of standard coarse thread M24 nut pitch, and nut thickness H is 21.5mm.All the other sizes conform to NBS.This nut adopts the steel billet of No. 45 steel, after forge hot and multiple tracks hot forging, make with the process equipment turning and the tapping of special this kind of processing nut, and heat-treat, quenching with Subsequent tempering HRC22 ~ 28 and blackout be coated with the wet goods reprocessing.
Embodiment 2
A kind of self tightening lock nut, specification are M24, and thread pitch t is 3.05mm, and the pitch difference numerical value between the standard coarse thread M24 nut is 1.76% of this standard nut pitch.All the other are with embodiment 1.
Embodiment 3
A kind of self tightening lock nut, specification are coarse thread M5, minor diameter of thread d
1Be 4.23mm, middle footpath d
2Be 4.56mm, screw thread nominal diameter d is 5.00mm, and nut thickness H is 3.5mm, be provided with 4 and 3/10 circle screw thread altogether, thread pitch t is 0.76mm, is different from the pitch of corresponding coarse thread M5 standard nut 0.80mm, and the pitch difference numerical value between the standard coarse thread M5 nut is 5% of this standard nut pitch.All the other sizes are by NBS processing.
Embodiment 4
A kind of self tightening lock nut, specification are coarse thread M48, minor diameter of thread d
1Be 42.65mm, middle footpath d
2Be 44.94mm, screw thread nominal diameter d is 48.00mm, nut thickness H is 38.00mm, be provided with 7 and 3/5 circle screw thread altogether, thread pitch t is 4.94mm, the pitch that is different from corresponding coarse thread M48 standard nut 5.00mm, and the pitch difference numerical value between the standard coarse thread M48 nut is 1.14% of this standard nut pitch.All the other are with embodiment 1.
Embodiment 5
A kind of self tightening lock nut, specification are 1/2 inch, minor diameter of thread d
1Be 10.300mm, middle footpath d
2Be 11.345mm, screw thread nominal diameter d is 12.700mm, per inch tooth number is 12, nut thickness H is 12.50mm, be provided with 6 circle screw threads altogether, thread pitch t is 2.077mm, is different from the pitch of the standard nut 2.117mm of corresponding 1/2 inch 12 tooth/inch, and the pitch difference numerical value between the standard nut of 1/2 inch 12 tooth/inch is 1.89% of this standard nut pitch.All the other sizes are by NBS processing.
The nut in the utility model and the standard bolt of same size are used, during use, in the starting stage that nut and bolt screw, only there is a small amount of flank of thread superimposed between nuts and bolt, because the difference of the pitch of this kind nut and standard nut pitch is very small, do not influence the Spielpassung between this stage inner nut and bolt, can screw nut with hand-power in this stage and make it in place on bolt, be supported, unlikely crooked; Continue to screw, when treating that the precession distance of nut on bolt reaches 70% left and right sides of nut thickness, because adding up of pitch difference, pine is not spacious like that like the starting stage in cooperation between nuts and bolt at this moment, changed transition fit into, screw thread screwed and produced extruding force between face this moment, and followed and living locking moment of torsion, but all also more weak, thus this stage still can rely on hand-power to screw; Continue again to screw, pitch difference continues to add up, cooperation between nuts and bolt is progressively voluntarily to the interference fit state-transition, when treating that nut screws on bolt near integral body, extruding force and locking moment of torsion that screw thread screws between face are quite big, after this, as long as nut integral body is on the bolt, no matter be precession or back-out, all must finish by the dependence instrument.
Claims (8)
1. a self tightening lock nut is characterized in that, the pitch of its screw thread is less than the thread pitch of the standard nut of same size, and the pitch difference numerical value between described nut and the standard nut is 1% to 6% of standard nut pitch.
2. self tightening lock nut according to claim 1, the thread turns that it is characterized in that described nut are that 3 circles are to 9 circles.
3. self tightening lock nut according to claim 1 and 2, the screw thread that it is characterized in that described nut is a V thread screw.
4. self tightening lock nut according to claim 3, the thread profile angle that it is characterized in that described nut are 60 ° or 55 °.
5. a self tightening lock nut is characterized in that, the pitch of its screw thread is greater than the thread pitch of the standard nut of same size, and the pitch difference numerical value between described nut and the standard nut is 1% to 6% of standard nut pitch.
6. self tightening lock nut according to claim 5, the thread turns that it is characterized in that described nut are that 3 circles are to 9 circles.
7. according to claim 5 or 6 described self tightening lock nuts, the screw thread that it is characterized in that described nut is a V thread screw.
8. self tightening lock nut according to claim 7, the thread profile angle that it is characterized in that described nut are 60 ° or 55 °.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120062207 CN201944075U (en) | 2011-03-11 | 2011-03-11 | Self-tightening check nut |
| PCT/CN2011/083541 WO2012122829A1 (en) | 2011-03-11 | 2011-12-06 | Self-tightening lock nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120062207 CN201944075U (en) | 2011-03-11 | 2011-03-11 | Self-tightening check nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944075U true CN201944075U (en) | 2011-08-24 |
Family
ID=44471419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120062207 Expired - Lifetime CN201944075U (en) | 2011-03-11 | 2011-03-11 | Self-tightening check nut |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201944075U (en) |
| WO (1) | WO2012122829A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012122829A1 (en) * | 2011-03-11 | 2012-09-20 | Yang Zhiqing | Self-tightening lock nut |
| WO2018119847A1 (en) * | 2016-12-29 | 2018-07-05 | 诠丰精密工具股份有限公司 | Threaded screwing engagement structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2215624Y (en) * | 1995-02-23 | 1995-12-20 | 上海康适达轮圈有限公司 | Screw-pitch changeable self-locking dismount-proof screw bolt pair |
| JPH09280239A (en) * | 1996-04-16 | 1997-10-28 | Haadorotsuku Kogyo Kk | Fastener |
| DE102006033704B3 (en) * | 2006-07-20 | 2008-01-03 | Kathrein-Werke Kg | High frequency coaxial type filter comprises one or multiple resonators, which has housing with inner space, and housing has two rear walls, which lies together and offset in axial direction |
| CN201535303U (en) * | 2009-04-03 | 2010-07-28 | 孙中强 | Bolt assembly with thread pitch difference between bolt and nut |
| CN201745572U (en) * | 2010-07-23 | 2011-02-16 | 上海汽车制动系统有限公司 | Support structure between front shell and back shell of through rod type booster |
| CN201944075U (en) * | 2011-03-11 | 2011-08-24 | 杨志清 | Self-tightening check nut |
-
2011
- 2011-03-11 CN CN 201120062207 patent/CN201944075U/en not_active Expired - Lifetime
- 2011-12-06 WO PCT/CN2011/083541 patent/WO2012122829A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012122829A1 (en) * | 2011-03-11 | 2012-09-20 | Yang Zhiqing | Self-tightening lock nut |
| WO2018119847A1 (en) * | 2016-12-29 | 2018-07-05 | 诠丰精密工具股份有限公司 | Threaded screwing engagement structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012122829A1 (en) | 2012-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |