CN104141670A - Anti-loose thread fastening structure - Google Patents
Anti-loose thread fastening structure Download PDFInfo
- Publication number
- CN104141670A CN104141670A CN201410244368.2A CN201410244368A CN104141670A CN 104141670 A CN104141670 A CN 104141670A CN 201410244368 A CN201410244368 A CN 201410244368A CN 104141670 A CN104141670 A CN 104141670A
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- nut
- thread
- bolt
- clamp ring
- locking nut
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Abstract
The invention discloses an anti-loose thread fastening structure which comprises a bolt and a nut matched with the bolt, wherein variable angle oblique planes are arranged at the root of an internal thread of the nut, and the included angle between each variable angle oblique plane and a bisector of a thread angle of the internal thread is larger than a half of the thread angle of the internal thread. Threads of each pair of matched bolt and nut can be sufficiently contacted and interacted in the spinning length of the anti-loose thread fastening structure, so that load can be uniformly distributed, the stress structure is more balanced, the working life of the structure is prolonged, and the condition that the fastening effect is weakened early and even lost due to fast abrasion damage caused by overlarge local stress of an ordinary screw pair is avoided; and besides, the thread matching gaps between the threads of the bolt and the nut can be eliminated by means of the variable angle oblique planes of the nut, so that the bolt and the nut can be tightly matched in a longer spinning length, higher anti-loose torsional moment can be produced, and an ideal fastening effect can be kept on the use occasion with frequent vibration.
Description
Technical field
The present invention relates to a kind of fastening structure, in particular, it relates to a kind of checknut fastening structure.
Background technique
If the torsion moment that common standard thread fastening piece applies is less, its coupling mechanism force mainly concentrates on screw bolt and nut first to coordinating on the flank of thread of thread, and remaining thread is almost in " swimming " state; If increase moment, the screw-thread fit face of first pair of thread produces bending and shear deformation, just can make second pair to coordinate thread to bear pressure, and generate coupling mechanism force, and remaining thread is still almost in " swimming " state; Continue to increase moment, the stress that the first pair of thread and the second pair of thread bear is general all at the more than 80 percent of whole screw pair fastening structure total load again, and thereafter each successively decreases successively to the coupling mechanism force on the flank of thread of thread, until be zero.Therefore, common standard threaded fastener force structure is very unbalanced, and main bearing position all concentrates on front two pairs of threads, and shearing and wear-out failure that front two pairs of threads are suffered are very serious, slide tooth because of two pairs of always generations at first of threads before this, fastening piece screw pair was lost efficacy gradually.In addition, in common standard thread screw pair fastening structure, between outside thread and internal thread, exist and move radially gap, under the condition of vibration, load and temperature variation, the coupling mechanism force that the fastening piece of working in coordination is easy to overcome on screw thread surface of contact produces from pine rotation and gets loose, used equipment or the facility of screw threads for fastening structure to bring potential safety hazard, also increased difficulty to standardized quality management simultaneously.Publication number is that the invention of CN102878182A discloses a kind of lock nut on January 16th, 2013, comprise nut body and anti-loose structure, anti-loose structure comprises elastic ring and wedge shape anti-loose structure, elastic ring is arranged at the first end of nut body, and wedge shape anti-loose structure is arranged on the end face of nut body the second end.The lock nut that this invention provides adopts dual anti-loose structure, has improved the anti-loosing effect of nut, has further improved the reliability being threaded; The required screw-down torque of this lock nut is little, can adopt the general tool such as common wrench or pneumatic wrench to realize and install and dismounting, makes installation and maintenance convenient, and reusable.But this invention fail to improve screw pair force structure, extrusion stress skewness when locking between bolts and nuts, part still can first fatigue damage, thereby shortens the working life of screw pair.
Summary of the invention
In common standard thread fastening structure, force structure is unbalanced, and working life is limited, and easily get loose voluntarily under more severe Environmental Conditions, for overcoming these defects, the invention provides a kind of force structure more balanced, the checknut fastening structure that self-locking effect is more outstanding.
Technological scheme of the present invention is: a kind of checknut fastening structure, comprise bolt and at least one nut coordinating with bolt, the internal screw thread root of the tooth place of described nut is provided with varied angle inclined-plane, and the angle of varied angle inclined-plane and internal screw thread tooth form angular bisector is greater than the half at internal screw thread tooth form angle.Varied angle inclined-plane can tie up the part space in internal screw thread alveolus, while making the thread of bolt enter in the alveolus of nut, between the tooth of bolt, be tight against on varied angle inclined-plane, eliminate the small freedom of movement of the bolt thread causing because of tolerance clearance diametrically and axially, all contact squeezes of every a pair of cooperation thread between bolts and nuts, the load that bolts and nuts screw rear whole screw threads for fastening structure like this can be distributed on the each thread in screw pair, therefore not only guarantee that the stress in screw pair is evenly shared, overcome the excessive and problem of accelerated wear test of localized stress, thereby can greatly extend the operating life of screw threads for fastening structure, on the other hand, the thread of bolts and nuts can remain drive fit, spinning in and out whole process all needs use instrument, can not exist bolts and nuts to unscrew each other the problem that the whole screw pair coupling mechanism force of several circles is just sharply lost.
As preferably, described nut is two, comprise locking nut and lock nut, the end face center that locking nut is relative with lock nut is provided with axially outstanding clamp ring, the gabarit of clamp ring is received carefully to free end gradually from root, the inwall of clamp ring is provided with the screw thread continuing in the internal thread of locking nut, clamp ring is provided with some breaches that radially connect clamp ring inside and outside wall, the end face center that lock nut is relative with locking nut is provided with the mouth that tightens up of axial indent, tightens up mouth and receives gradually carefully to a mouthful end from port.Internal thread in clamp ring can screw with the outside thread of bolt, and clamp ring is owing to being provided with breach, thereby can radially draw in.When locking nut screws and puts in place on bolt, lock nut also screws gradually near locking nut on bolt, tightening up mouth progressively forms chimeric with clamp ring, all there is tapering owing to tightening up mouth with clamp ring, therefore tighten up mouth and be convertible into lateral extrusion with chimeric the latter two the mutual axial displacements of clamp ring, part between clamp ring breach is radially drawn under squeezing action, chimeric degree is darker, clamp ring is just received tightlyer, pressure between the internal screw thread of clamp ring and bolt external screw thread can further strengthen in original cooperation on dynamics, improve the locking moment of torsion of this checknut fastening structure, thereby greatly strengthen anti-loosing effect.
As an alternative, described nut is two, comprise locking nut and lock nut, the end face that locking nut is relative with lock nut is provided with eccentric shrinkage pool, the end face that lock nut is relative with locking nut is provided with eccentric bulge loop, and described eccentric shrinkage pool and eccentric bulge loop are equipped with tapering and adaptive chimeric mutually.Locking nut and lock nut near time, eccentric bulge loop and eccentric shrinkage pool are chimeric gradually, after completely chimeric, the eccentric structure of eccentric bulge loop and eccentric shrinkage pool and adaptive chimeric matching relationship have determined that relatively rotating between eccentric bulge loop and eccentric shrinkage pool can run into larger resistance, if make locking nut and lock nut, the two separates, must on the basis that overcomes coupling mechanism force between nut and bolt, also to apply extra torsional moment to overcome the resistance between locking nut and lock nut, therefore the lock nut coordinating with locking nut by eccentric concaveconvex structure can improve the fastening strength between locking nut and bolt greatly, obtain better anti-loosing effect.
As preferably, the screw thread on described screw bolt and nut is V thread screw.V thread screw application is the most general, and the most easily processing comparatively speaking.
The invention has the beneficial effects as follows:
Greatly improve the force structure of screw pair, extending structure operating life.In the screwing length of this checknut fastening structure, the bolt of every a pair of cooperation and the thread of nut can fully contact and interact, therefore can uniform distribution load, force structure is more balanced, thereby extending structure operating life, avoid the excessive Fast Wearing that causes of localized stress in common screw pair to destroy, make fastening effect weaken ahead of time and even lose.
There is excellent antivibration anti-loosening property.In the present invention, the thread matching gap of bolts and nuts can be eliminated in the varied angle inclined-plane of nut, make bolts and nuts can remain and closely cooperate in longer screwing length, produce stronger locking torsional moment, also can keep desirable fastening effect vibrating use occasion frequently.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is another kind of structural representation of the present invention;
Fig. 3 is the structural representation of locking nut in embodiment 2;
Fig. 4 is the structural representation of the present invention in embodiment 3.
In figure, 1-internal screw thread, 2-varied angle inclined-plane, 3-locking nut, 4-lock nut, 5-clamp ring, 6-tightens up mouth, the eccentric shrinkage pool of 7-, the eccentric bulge loop of 8-, 9-breach, 10-bolt.
Embodiment
Below in conjunction with accompanying drawing specific embodiment, the invention will be further described.
embodiment 1:
As shown in Figure 1, a kind of checknut fastening structure, comprises bolt and a nut coordinating with bolt, and described bolt is standard metric system bolt, in the internal screw thread 1 root of the tooth place of described nut, flank of thread is provided with varied angle inclined-plane 2, and the remaining part of internal screw thread 1 is identical with standard metric system nut.Screw thread on described screw bolt and nut is V thread screw, and tooth form angle is 60 °, and varied angle inclined-plane 2 is 31.6 ° with the angle of internal screw thread 1 tooth form angular bisector.
When nuts and bolt in the present embodiment screws, because varied angle inclined-plane 2 has occupied the part thread groove bottom land space of nut, eliminate matching gap, the thread cusp of bolt is against on varied angle inclined-plane 2, and the upper flank of thread of bolt thread is subject to the restriction of flank of thread under the nut thread of this bolt thread top, therefore bolts and nuts coordinate the just stronger mutual extruding of generation at the beginning, and change into the frictional force between screw thread, even if nut is not screwed to the end, bolts and nuts also keep drive fit and there will not be the looseness situation as coordinated the initial stage in regular screw threads fastening structure.This checknut fastening structure can use under the not too large environment of vibration.
embodiment 2:
As shown in Figure 2 and Figure 3, described nut is two, comprises locking nut 3 and lock nut 4, and locking nut 3 is mainly used in coordinating fastening object being applied to fastening force with bolt, and 4 of lock nuts stop locking nut 3 rollbacks, thereby play reinforcement fastening effect.On locking nut 3, the end face center relative with lock nut 4 is provided with axially outstanding clamp ring 5 one-body moldedly, the gabarit of clamp ring 5 is received carefully to free end gradually from root, the inwall of clamp ring 5 is provided with the screw thread continuing in the internal thread of locking nut 3, clamp ring 5 is provided with three roads and radially connects the breach 9 of clamp ring 5 inside and outside walls, clamp ring 5 is divided into three lobes, each lobe all can do deflection by a small margin, on lock nut 4, what the end face center relative with locking nut 3 was provided with axial indent tightens up mouthfuls 6, tightening up mouth 6 receives carefully to a mouthful end gradually from port, the tapering that tightens up mouth 6 is slightly less than the tapering of clamp ring 5.All the other are with embodiment 1.
While using the checknut fastening structure in the present embodiment, first locking nut 3 is screwed on bolt until compress fastening object, now, as described in example 1 above, thread point and the varied angle inclined-plane 2 of locking nut 3 of bolt have pushed against, formed the drive fit than regular screw threads fastening structure with higher locking moment of torsion, and due to the internal thread of the internal thread continuity Self-lock nut 3 of each lobe in clamp ring 5, therefore the internal thread of clamp ring 5 each lobes also can screw with the screw thread of bolt, after locking nut 3 screws and puts in place on bolt, again lock nut 4 is screwed on bolt, gradually near locking nut 3, tightening up mouth 6 progressively forms chimeric with clamp ring 5, all there is tapering owing to tightening up mouth 6 with clamp ring 5, therefore tighten up mouth 6 and be convertible into lateral extrusion with chimeric the latter two the mutual axial displacements of clamp ring 5, each lobe between breach 9 in clamp ring 5 radially draws under squeezing action, owing to tightening up mouthfuls 6 tapering and be slightly less than the tapering of clamp ring 5, therefore can guarantee to tighten up mouth 6 can receive enough tightly by clamp ring 5, chimeric degree is darker, clamp ring 5 is just received tightlyer, pressure between internal screw thread 1 and bolt external screw thread in clamp ring 5 can further strengthen in original cooperation on dynamics, further improve the locking moment of torsion of this checknut fastening structure, thereby greatly strengthen anti-loosing effect.This checknut fastening structure can use under rugged environment vibrating frequently.
embodiment 3:
As shown in Figure 3, described nut is two, comprise locking nut 3 and lock nut 4, locking nut 3 is provided with eccentric shrinkage pool 7, eccentric shrinkage pool 7 is positioned on the end face relative with lock nut 4, lock nut 4 is provided with eccentric bulge loop 8, eccentric bulge loop 8 is positioned on the end face relative with locking nut 3, eccentric shrinkage pool 7 and eccentric bulge loop 8 are equipped with tapering and adaptive chimeric mutually, deviation distance between the eccentric axis of shrinkage pool 7 and the axis of locking nut 3, equates with the deviation distance between the axis of eccentric bulge loop 8 and lock nut 4.All the other are with embodiment 1.
In the present embodiment, locking nut 3 and lock nut 4 also can form reinforced checknut fastening structure with bolt 10.After locking nut 3 and bolt 10 complete and screw, lock nut 4 superposes on locking nut 3 again, locking nut 3 and lock nut 4 near time, eccentric bulge loop 8 is chimeric gradually with eccentric shrinkage pool 7, after completely chimeric, the eccentric structure of eccentric bulge loop 8 and eccentric shrinkage pool 7 and adaptive chimeric matching relationship have determined that relatively rotating between eccentric bulge loop 8 and eccentric shrinkage pool 7 can run into larger resistance, if make locking nut 3 and lock nut 4, the two separates, must on the basis that overcomes coupling mechanism force between nut and bolt, also to apply extra torsional moment to overcome the resistance between locking nut 3 and lock nut 4, therefore the lock nut 4 coordinating with locking nut 3 by eccentric concaveconvex structure can improve the fastening strength between locking nut and bolt greatly, obtain better anti-loosing effect.
?
Claims (4)
1. a checknut fastening structure, comprise bolt and at least one nut coordinating with bolt, internal screw thread (1) the root of the tooth place that it is characterized in that described nut is provided with varied angle inclined-plane (2), and the angle of varied angle inclined-plane (2) and internal screw thread (1) tooth form angular bisector is greater than the half at internal screw thread (1) tooth form angle.
2. checknut fastening structure according to claim 1, it is characterized in that described nut is two, comprise locking nut (3) and lock nut (4), the end face center that locking nut (3) is relative with lock nut (4) is provided with axially outstanding clamp ring (5), the gabarit of clamp ring (5) is received carefully to free end gradually from root, the inwall of clamp ring (5) is provided with the screw thread continuing in the internal thread of locking nut (3), clamp ring (5) is provided with some breaches that radially connect clamp ring (5) inside and outside wall, the end face center that lock nut (4) is relative with locking nut (3) is provided with tighten up mouthful (6) for axial indent, tightening up mouthful (6) receives carefully to a mouthful end gradually from port.
3. checknut fastening structure according to claim 1, it is characterized in that described nut is two, comprise locking nut (3) and lock nut (4), the end face that locking nut (3) is relative with lock nut (4) is provided with eccentric shrinkage pool, the end face that lock nut (4) is relative with locking nut (3) is provided with eccentric bulge loop, and described eccentric shrinkage pool and eccentric bulge loop are equipped with tapering and adaptive chimeric mutually.
4. according to the checknut fastening structure described in claim 1 or 2 or 3, it is characterized in that the screw thread on described screw bolt and nut is V thread screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244368.2A CN104141670A (en) | 2014-06-03 | 2014-06-03 | Anti-loose thread fastening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244368.2A CN104141670A (en) | 2014-06-03 | 2014-06-03 | Anti-loose thread fastening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104141670A true CN104141670A (en) | 2014-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410244368.2A Pending CN104141670A (en) | 2014-06-03 | 2014-06-03 | Anti-loose thread fastening structure |
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| CN (1) | CN104141670A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804989A (en) * | 2016-04-15 | 2016-07-27 | 宝鸡石油机械有限责任公司 | Thread pre-tightening and locking device for well drilling pump valve cover |
| CN109538608A (en) * | 2018-12-28 | 2019-03-29 | 天津市盛立达机械设备有限公司 | Radial locking stop nut |
| CN109654104A (en) * | 2018-12-12 | 2019-04-19 | 中国北方发动机研究所(天津) | A kind of turbine rotor locking nut |
| CN109854604A (en) * | 2018-12-28 | 2019-06-07 | 天津市盛立达机械设备有限公司 | Radial claw locking nut |
| CN110439908A (en) * | 2019-09-04 | 2019-11-12 | 王树敏 | Fastening type Anti-loosening nut |
| CN112510369A (en) * | 2020-11-24 | 2021-03-16 | 武汉滨湖电子有限责任公司 | Antenna every single move transmission with early warning protection |
| CN115111248A (en) * | 2022-08-02 | 2022-09-27 | 远景能源有限公司 | Embedded bolt sleeve and wind driven generator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN86204074U (en) * | 1986-09-08 | 1987-07-22 | 宁波市江北区工业局 | Locknut |
| CN2692400Y (en) * | 2004-04-09 | 2005-04-13 | 江阴市第三铸造机械有限公司 | Shrinking type antiloose screwbolt |
| EP1528840A1 (en) * | 2003-10-31 | 2005-05-04 | Sgl Carbon Ag | Threaded connection for carbon and/or graphite electrode columns |
| CN101240810A (en) * | 2007-02-07 | 2008-08-13 | 张振祥 | Double tooth variation type double anti-loose nut |
| JP2013185704A (en) * | 2012-03-05 | 2013-09-19 | Tanaka Masae | Lock nut |
| CN204003910U (en) * | 2014-06-03 | 2014-12-10 | 宁波华路汽车电器有限公司 | A kind of checknut fastening structure |
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2014
- 2014-06-03 CN CN201410244368.2A patent/CN104141670A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86204074U (en) * | 1986-09-08 | 1987-07-22 | 宁波市江北区工业局 | Locknut |
| EP1528840A1 (en) * | 2003-10-31 | 2005-05-04 | Sgl Carbon Ag | Threaded connection for carbon and/or graphite electrode columns |
| CN2692400Y (en) * | 2004-04-09 | 2005-04-13 | 江阴市第三铸造机械有限公司 | Shrinking type antiloose screwbolt |
| CN101240810A (en) * | 2007-02-07 | 2008-08-13 | 张振祥 | Double tooth variation type double anti-loose nut |
| JP2013185704A (en) * | 2012-03-05 | 2013-09-19 | Tanaka Masae | Lock nut |
| CN204003910U (en) * | 2014-06-03 | 2014-12-10 | 宁波华路汽车电器有限公司 | A kind of checknut fastening structure |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804989A (en) * | 2016-04-15 | 2016-07-27 | 宝鸡石油机械有限责任公司 | Thread pre-tightening and locking device for well drilling pump valve cover |
| CN105804989B (en) * | 2016-04-15 | 2017-10-31 | 宝鸡石油机械有限责任公司 | Drilling pump bonnet threaded pre-tightening locking device |
| CN109654104A (en) * | 2018-12-12 | 2019-04-19 | 中国北方发动机研究所(天津) | A kind of turbine rotor locking nut |
| CN109538608A (en) * | 2018-12-28 | 2019-03-29 | 天津市盛立达机械设备有限公司 | Radial locking stop nut |
| CN109854604A (en) * | 2018-12-28 | 2019-06-07 | 天津市盛立达机械设备有限公司 | Radial claw locking nut |
| CN110439908A (en) * | 2019-09-04 | 2019-11-12 | 王树敏 | Fastening type Anti-loosening nut |
| CN112510369A (en) * | 2020-11-24 | 2021-03-16 | 武汉滨湖电子有限责任公司 | Antenna every single move transmission with early warning protection |
| CN115111248A (en) * | 2022-08-02 | 2022-09-27 | 远景能源有限公司 | Embedded bolt sleeve and wind driven generator |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141112 |