CN1107170C - Loosing and method of making same - Google Patents
Loosing and method of making same Download PDFInfo
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- CN1107170C CN1107170C CN97112246A CN97112246A CN1107170C CN 1107170 C CN1107170 C CN 1107170C CN 97112246 A CN97112246 A CN 97112246A CN 97112246 A CN97112246 A CN 97112246A CN 1107170 C CN1107170 C CN 1107170C
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Abstract
The present invention relates to a loosening resistant nut and a manufacturing method thereof. The loosening resistant nut of the present invention comprises a tool installing part, an annular convex part which is coaxially, upward and convexly provided with the tool installing part, and a through thread hole arranged between the tool installing part and the annular convex part. The manufacturing method of the present invention comprises a step for manufacturing a middle manufacturing body and a diameter reducing step, wherein a plurality of longitudinal slots are formed in the external circumferential direction of the convex part, a plurality of segments are formed by division, and a middle manufacturing body is pressurized by a pressurizing body which is in contact with the outer surface of at least one of the segments for reducing the diameter of the segment and deforming the segment in the radial direction. After being repeatedly used, the loosening resistant nut of the present invention has good loosening resistance. When used, the loosening resistant nut can not be clamped, the producing rate is high, and the cost is low.
Description
The present invention relates to the making method of lock nut and lock nut.
Adopted widely in the past lock nut has with the whole locking effect of nut.In order to realize the locking of screw bolt and nut, needn't adopt other parts such as packing ring.
For example, disclosed a kind of lock nut the flat 3-7806 of Japan Patent number, the screw top of its nut hole periphery own is provided with the notch that radially extends.With said notch portion every and the rear end part that is threaded into direction of the worm tooth section that forms, by outside pressurization, then to internal strain to the above-mentioned top of nut own; And cut ends screws in the worm tooth of the external screw thread that is spirally connected with respect to reciprocal the rotatablely moving of screw thread.According to such lock nut, with respect to reverse the rotatablely moving of screw thread, the cut ends of the worm tooth of each worm tooth section part plays and screws in the effect in the bolt thread tooth and can obtain good anti-loosing effect.But in order to form bigger time of notch spend and cost, simultaneously, be difficult to critically operate, only inwardly make the rear end distortion that is threaded into direction of worm tooth section.Therefore, being difficult to obtain certain quality guarantees.In addition, cut ends is when screwing in the worm tooth of external screw thread, and the possibility of damaging external screw thread is bigger.
In addition, disclosed a kind of lock nut the clear 48-15139 of Japan Patent number, formed threaded nut body, the one end has the collar of cylindrical shape excircle; Be deformed into ellipse with a pair of relative spill die face from radially making above-mentioned collar deep draw.According to such lock nut, can prevent to damage external screw thread and anti-loosing effect is arranged, but repeatedly to after the bolt mounting or dismounting, anti-loosing effect can reduce greatly.Also this is to say, said nut one is spirally connected with bolt, collar microstructure has micro-strain respectively and has seen that on the whole becoming circle is inclined to, but, at this moment each microstructure produces little distortion respectively, then produce in general and play very important plastic deformation to locking, the result causes anti-loosing effect significantly to reduce.
Have again, disclosed a kind of lock nut the clear 55-44126 of Japan Patent number, the equally divided position of its nut thread hole front end inner circumference is provided with many grooves parallel with tapped hole and will be processed into taper corresponding to the nut outer peripheral surface of said tapped hole front end inner circumference.Said taper adopts the mould with taper die cavity to the internal diameter pressure forming, make again tapped hole front end inner circumference form can with the minor diameter tapped hole of bolt thread excircle crimping.According to such lock nut, nut is thin more to end thickness more, and the elasticity of said part is big more, so utilize such elastic force can be locking.Once use and do not damage, will bring into play desired anti-loosing effect when repeatedly loading and unloading are used.Yet when said nut and bolt were spirally connected, the external screw thread eye of bolt formed groove in the screw thread front end inner circumference that will enter nut; Tend to occur the situation that can not be spirally connected with bolt in fact.
The object of the present invention is to provide a kind of lock nut that can be used with bolt and preparation method thereof.Cost of the present invention is low, and the productivity height still can play stable locking effect when repeatedly loading and unloading are used.
The object of the present invention is achieved like this: lock nut provided by the invention comprises the instrument assembly department and from the outstanding upward coaxially cyclic lug branch that is provided with of said instrument assembly department, is provided with tapped hole through said instrument assembly department and projection.Form many cannelures on the circumferencial direction of the outer circumferential sides of said projection, at least one section is slightly dwindled with the aperture that causes tapped hole by with inside pressure distortion radially in the formed section between said cannelure.That is to say, such lock nut since the section of pressure distortion and and the section of said section adjacency between form cannelure, though, can desired section be out of shape with desired amount of deformation with pressure so will suppress distortion in abutting connection with section.In addition, it is suitable that said distortion is carried out, so that boost productivity and reduce cost.And, with before bolt tightening cooperates, to dwindle through the tapped bore of the section inner circumferential portion of pressure distortion.If nut tightens up cooperation on bolt, then said bolt can make said section with the radially outward diffusion.At this moment, the cannelure of formation partly plays elastic reaction, because resiliently deformable, when when bolt unloads lower nut, because elastic returning arrives the state of necking deformation, so, when repeatedly loading and unloading repeatedly, still can play stable and good locking effect.In addition, all thread grooves in the nut are owing to be continuous on whole length, so, block with the bolt Shi Buhui that is spirally connected, steadily Dingan County adorns.
Lock nut of the present invention is preferably on the whole circumference direction and disposes a plurality of sections with pressure distortion equably every certain interval.So, when making, when from circumference foreign side when making these section pressure distortions, the pressure that acts on these sections is offseted, the supporting of nut in the time of can simplifying distortion simultaneously, can make these sections with roughly distortion equably.And, when product uses, when being spirally connected with bolt, load acts between distortion section internal surface and the bolt outer surface, owing to such load acts in a circumferential direction equably, so, bolt axis and nut axis almost do not depart from, thereby make with the bolt tightening compounding practice good.Simultaneously, only can prevent that certain part is subjected to bigger compressive force on the circumferencial direction.The number of distortion section is preferably three, is being provided with in the radial position more than two or four but also have.
In addition, the external diameter of stress deformation section cand be compared to before distortion does not at least most have pressure distortion section external diameter big.According to such structure, the section of stress deformation is owing to compare with other sections.Be the radially outward standing shape, so be easy to make that should be out of shape section carries out pressure distortion.
Have again, if protuberance is made its external diameter with the outside truncated cone of undergauge gradually of axial direction, then can be easily and promptly make desired section distortion by means of the pressure body of concave surface portion with the truncated cone that just in time embeds protuberance.Productivity is improved and the cost reduction.And the adjusting of amount of deformation can be easily carried out in the adjustment of the compression stroke by pressure body.Simultaneously, since protuberance thickness progressively to outstanding end attenuation, so the distortion of its end will be carried out properly.
The making method of above-mentioned lock nut preferably includes the operation of making the intermediate fabrication body, said intermediate fabrication body is provided with the instrument assembly department, above said instrument assembly department outstanding with one heart and outside circumferencial direction with the annular protuberance of the truncated cone with many pods of certain alternate formation in interval and the tapped hole that connects the axle center; And by from the top of the annular protuberance of above-mentioned intermediate fabrication body along axial direction relative intermediate fabrication body pressurization with by each section of above-mentioned pod differentiation in the press body that contacts of the outside of at least one section, radially to make said a part of section necking deformation and the aperture of above-mentioned tapped hole dwindled.
According to such method, the contact segment wedging action (awl effect) by protuberance and press body can apply big pressure to desired section on the undergauge direction, carries out transformation processing accurately.Simultaneously, carry out synchronously, so can make the lock nut of certain mass with high productivity by the walking of intermediate fabrication body and the reciprocating action of press body.In addition, because the contact segment of press body and protuberance is tapered, the stroke of pressing press body changes, and the amount of deformation of protuberance is linear change, with this distortion is finely tuned.And the section that should be out of shape and should not be out of shape between the section by pod and form the gap can prevent to make the section distortion that should not be out of shape.
Figure 1 shows that the oblique drawing of the lock nut of the embodiment of the invention 1, wherein be depicted as protuberance pressurizing and deformation state before;
Figure 2 shows that the top view of lock nut shown in Figure 1;
Figure 3 shows that the sectional arrangement drawing of the production process of the lock nut of representing the embodiment of the invention 1;
Figure 4 shows that the sectional drawing of expression protuberance pressurizing and deformation state, its midship section intercepts with the A-A line among Fig. 5;
Figure 5 shows that the top view of finished product of the lock nut of the embodiment of the invention 1;
Figure 6 shows that the top view of the lock nut of the embodiment of the invention 2, wherein be depicted as protuberance pressurizing and deformation state before;
Figure 7 shows that the sectional arrangement drawing of the mould of the lock nut of making the embodiment of the invention 2;
Figure 8 shows that B-B alignment view among Fig. 7;
Figure 9 shows that the oblique drawing of the lock nut of the embodiment of the invention 3;
Figure 10 shows that the oblique drawing of the lock nut of the embodiment of the invention 4; And
Figure 11 shows that the oblique drawing of the lock nut of the embodiment of the invention 5.
Below, in conjunction with the embodiments lock nut of the present invention is described further with reference to the accompanying drawings.
Fig. 1～5 are depicted as the lock nut 1 of the embodiment of the invention 1.Said nut 1 is provided with instrument assembly department 2, and it has the hexagon profile with turning tools such as cooperation wrench, and the annular protuberance of giving prominence to upward coaxially above said instrument assembly department 23.Said instrument assembly department 2 and protuberance 3 also can be shaped with other mould-forming method such as forge hots preferably with the cold forging unitary moulding.
Said protuberance 3 is truncated cone, and its outer radial upper end reduces gradually, along the circumferential direction forms many pods 6 on its excircle, and protuberance is separated to form a plurality of sections 4,5 with pod ...The groove of said pod 6 for forming on the axial whole length of protuberance can be used cold-forging forming simultaneously.
Form interior threaded hole 7 in the axle center of the nut 1 that constitutes by instrument assembly department 2 and protuberance 3.
To the embodiment shown in the figure, as shown in Figure 2, be provided with 6 pods 6.In addition, be a pair of with 2 pods 6, it is right then to form three pairs of pods.Width on the circumferencial direction of the section 4 between the every pair of pod 6 is about half of width on the circumferencial direction of section 5.
To the embodiment shown in the figure, the section 4 of pressurizing and deformation is 3.4 of these 3 sections dispose with certain branch ground such as interval in a circumferential direction.
Bigger through the external diameter of the section 4 of pressurizing and deformation than external diameter without the section 5 of pressurizing and deformation.
Below, will the making method of above-mentioned lock nut 1 be described.
At first, by the cold forging blank, form have through hole and be hexagon nut shape instrument assembly department 2 profile and from the profile of said instrument assembly department 2 with the outstanding reducing truncated cone protuberance 3 of axle center outward direction.Here, on protuberance 3, form pod 6, simultaneously, make the external diameter of the external diameter of section to be out of shape 4 through pressure processing greater than indeformable section 5.After such pressure processing,, then obtain the intermediate fabrication body 9 of distortion preceding (before locking) to the through hole machining screw.The root diameter P of the tapped hole 7 of said intermediate fabrication body 9 is all identical on axial whole length.
With conveyor said intermediate fabrication body 9 is transported to press machine, waits to be out of shape section 4 pressure distortions radially inwardly to make by press machine.Said press machine is equipped with a mould 10 with the recess 11 that cooperates with the protuberance 3 of nut 1.By making moving up and down of said mould 10, can make the intermediate fabrication body 9 that preface in turn transports protuberance 3 wait be out of shape section 4 only with desired amount of deformation necking deformation.After distortion, be out of shape the minor diameter of thread S of the tapped hole 7 of section 4 internal surfaces, as shown in Figure 4, than the smaller and undergauge of distortion diameter P before.If establishing section 4 radially inner amount of deformation is ds, then the P=S+2ds relation is set up substantially.
The inner circumferential surface of above-mentioned recess 11 is truncated cone, can contact by formation face with waiting the outer surface that is out of shape section 4.Only compress by making mould 10 aim at intermediate fabrication body 9 with needed stroke along axial direction, one side with wait that being out of shape section 4 outer surface faces contact, simultaneously under the taper effect, make said section 4 carry out pressure distortion.
According to such making method,, can adjust section 4 desired amount of deformation easily and exactly, thereby can improve the quality of products and productivity by adjusting the stroke of mould 10.
The present invention is not limited only to the above embodiments, can make suitable conversion.For example, as shown in Figure 6, the external diameter that is out of shape section 4 of waiting of lock nut 1 of the present invention can make identical diameter with the external diameter of indeformable section 5.Such lock nut 1 can be made of the mould shown in Fig. 7 and Fig. 8 10.The inner circumferential surface of the recess 11 of this mould 10 is waited to be out of shape on the position of section 4 and is provided with the protuberance 12 that contacts with the outside of said section 4 highlightedly corresponding to nut 1.When making mould 10 when axial direction is aimed at intermediate fabrication body 9 and compressed, only wait to be out of shape section 4 with radially to internal strain.Protuberance 12 preferably makes and waits to be out of shape section 4 size about the same and shapes.
In addition, lock nut 1 of the present invention can form a flange 13 in the lower end of as shown in Figure 9 instrument assembly department 2.
As shown in figure 10, lock nut 1 its instrument assembly department 2 of the present invention is cylindric, and the certain position on its circumferencial direction can form instrument engagement groove 14
Have, lock nut 1 of the present invention can only form two (a pair of) pod 6 as shown in figure 11 again, waits to be out of shape section 4 and only is one.
Claims (5)
1. lock nut, it is characterized in that said lock nut is one to have the nut of the tapped hole (7) of axial perforation, it comprises the cyclic lug (3) that is used to cooperate the instrument assembly department (2) of turning tool and forms concentric threads hole (7) spiral on the top of said instrument assembly department (2), the outer peripheral surface of said protuberance (3) is with certain many pods (6) that are interval with, form a plurality of sections (4), (5) thus, in said these sections, at least one section is made the reduced of said tapped hole (7) by radially inside pressurizing and deformation.
2. lock nut according to claim 1 is characterized in that the section of said pressurizing and deformation and the mutual cross-over configuration of indeformable section and equivalent arrangements in a circumferential direction.
3. lock nut according to claim 2, the section that it is characterized in that said pressurizing and deformation is 3.
4. lock nut according to claim 1 is characterized in that the external diameter of said pressurizing and deformation section compares with the external diameter of the section of pressurizing and deformation not, makes major diameter at least before distortion.
5. lock nut according to claim 1 is characterized in that said annular protuberance makes its diminishing truncated cone in outer radial top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112246A CN1107170C (en) | 1997-07-10 | 1997-07-10 | Loosing and method of making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112246A CN1107170C (en) | 1997-07-10 | 1997-07-10 | Loosing and method of making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1205402A CN1205402A (en) | 1999-01-20 |
| CN1107170C true CN1107170C (en) | 2003-04-30 |
Family
ID=5172160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97112246A Expired - Fee Related CN1107170C (en) | 1997-07-10 | 1997-07-10 | Loosing and method of making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1107170C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813119A (en) * | 2010-04-22 | 2010-08-25 | 益阳橡胶塑料机械集团有限公司 | Lock nut |
| CN103352909A (en) * | 2013-06-28 | 2013-10-16 | 南车眉山车辆有限公司 | Anti-loose and fastening connecting method and system through thread extrusion |
| CN105090208A (en) * | 2015-08-25 | 2015-11-25 | 王景东 | Looseness-preventing and disassembling-preventing bolt |
| CN105710255A (en) * | 2016-04-20 | 2016-06-29 | 国网上海市电力公司 | Machining technology of antitheft nut of 35KV outdoor upper rod platform support |
| CN106545563A (en) * | 2016-12-08 | 2017-03-29 | 河南航天精工制造有限公司 | Antivibration anti-loosing nut |
| CN107939808B (en) * | 2017-12-06 | 2020-05-12 | 航天精工股份有限公司 | Hexagonal slotting self-locking nut |
| CN108757688A (en) * | 2018-07-16 | 2018-11-06 | 李鹏飞 | A kind of locking combination nut of push mode |
| CN109513874A (en) * | 2018-12-29 | 2019-03-26 | 苏州工业园区新凯精密五金有限公司 | It is a kind of for manufacturing the cold-heading molding technique and cold heading die group of tetragonal pyramid bottom nut |
| CN111005927B (en) * | 2019-12-27 | 2022-04-15 | 海能达通信股份有限公司 | Fastening assembly and anti-loosening piece |
| TWI721764B (en) * | 2020-01-22 | 2021-03-11 | 林家民 | Lock nut set |
| CN113153886B (en) * | 2020-01-22 | 2022-09-16 | 林家民 | Anti-loosening nut group |
| CN112854750B (en) * | 2021-03-15 | 2022-10-04 | 福建省闽发铝业股份有限公司 | Aluminum alloy template stair side sealing section bar |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB580325A (en) * | 1944-06-28 | 1946-09-04 | Philidas Ltd | Improvements in or relating to self-locking or "stiff" nuts |
| US2923339A (en) * | 1957-11-25 | 1960-02-02 | Harold J Skidmore | Lock nut having external projections deformed radially inwardly |
| JPS5544126A (en) * | 1978-09-19 | 1980-03-28 | Sanwa Seikou Kk | Lock nut and its manufacture |
-
1997
- 1997-07-10 CN CN97112246A patent/CN1107170C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB580325A (en) * | 1944-06-28 | 1946-09-04 | Philidas Ltd | Improvements in or relating to self-locking or "stiff" nuts |
| US2923339A (en) * | 1957-11-25 | 1960-02-02 | Harold J Skidmore | Lock nut having external projections deformed radially inwardly |
| JPS5544126A (en) * | 1978-09-19 | 1980-03-28 | Sanwa Seikou Kk | Lock nut and its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1205402A (en) | 1999-01-20 |
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