CN204003910U - A kind of checknut fastening structure - Google Patents
A kind of checknut fastening structure Download PDFInfo
- Publication number
- CN204003910U CN204003910U CN201420290835.0U CN201420290835U CN204003910U CN 204003910 U CN204003910 U CN 204003910U CN 201420290835 U CN201420290835 U CN 201420290835U CN 204003910 U CN204003910 U CN 204003910U
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- nut
- thread
- bolt
- checknut
- screw thread
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- 230000003044 adaptive effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000003456 pulmonary alveoli Anatomy 0.000 description 2
- 230000009182 swimming 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
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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- Bolts, Nuts, And Washers (AREA)
Abstract
The utility model discloses 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 half of internal screw thread tooth form angle.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; In addition in the utility model, 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.
Description
Technical field
The utility model relates to a kind of fastening structure, and 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 the flank of thread of first pair of cooperation thread of screw bolt and nut, 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, stress that the first pair of thread and the second pair of thread bear is general, and all at the more than 80 percent of whole screw pair fastening structure total load, thereafter each successively decreases successively to the coupling mechanism force on the flank of thread of thread, until be zero again.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, because of two pairs of always generations at first of threads before this, slide tooth, 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 to standardized quality management, increased difficulty 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 model utility 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 tools such as common wrench or pneumatic wrench to realize and install and dismounting, makes installation and maintenance convenient, and reusable.But this model utility fail to improve screw pair force structure, extrusion stress skewness during locking between bolts and nuts, part still can first fatigue damage, thereby shortens the working life of screw pair.
Model utility content
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 utility model provides a kind of force structure more balanced, the checknut fastening structure that self-locking effect is more outstanding.
The technical solution of the utility model 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 half of 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, the small freedom of movement of the bolt thread that elimination causes because of tolerance clearance diametrically and axially, every a pair of cooperation thread contact squeeze all between bolts and nuts, the load that bolts and nuts screw rear whole screw threads for fastening structure like this can be distributed on 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 of the whole screw pair coupling mechanism force of several circles with regard to sharply losing.
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, owing to tightening up mouth, all there is tapering 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, the internal screw thread of clamp ring can further strengthen in original cooperation on dynamics with the pressure between bolt external screw thread, 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 is separated, 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 beneficial effects of the utility model are:
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 utility model, 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.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is another kind of structural representation of the present utility model;
Fig. 3 is a kind of structural representation of locking nut in embodiment 2;
Fig. 4 is the structural representation of the present utility model 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.
Embodiment
Below in conjunction with accompanying drawing specific embodiment, the utility model is described in further detail.
embodiment 1:
As shown in Figure 1, a 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 the 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, eliminated 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 as coordinated the looseness situation at initial stage in regular screw threads fastening structure.This checknut fastening structure can be used 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.The end face center that locking nut 3 is 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 the breach 9 that three roads radially connect clamp ring 5 inside and outside walls, clamp ring 5 is divided into three lobes, each lobe all can be done deflection by a small margin, what the end face center that lock nut 4 is 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, so 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, owing to tightening up mouth 6, all there is tapering 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, internal screw thread 1 in clamp ring 5 can further strengthen in original cooperation on dynamics with the pressure between bolt external screw thread, further improve the locking moment of torsion of this checknut fastening structure, thereby greatly strengthen anti-loosing effect.This checknut fastening structure can be used under rugged environment vibrating frequently.
embodiment 3:
As shown in Figure 4, 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.After locking nut 3 and bolt 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 chimeric matching relationship of the eccentric structure of eccentric bulge loop 8 and eccentric shrinkage pool 7 and adaptation has determined that relatively rotating of 7 of eccentric bulge loop 8 and eccentric shrinkage pools can run into larger resistance, if make locking nut 3 and lock nut 4, the two is separated, must on the basis that overcomes coupling mechanism force between nut and bolt, also to apply extra torsional moment to overcome the resistance of 4 of locking nut 3 and lock nuts, 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 half of 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 |
|---|---|---|---|
| CN201420290835.0U CN204003910U (en) | 2014-06-03 | 2014-06-03 | A kind of checknut fastening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290835.0U CN204003910U (en) | 2014-06-03 | 2014-06-03 | A kind of checknut fastening structure |
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| Publication Number | Publication Date |
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| CN204003910U true CN204003910U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420290835.0U Expired - Lifetime CN204003910U (en) | 2014-06-03 | 2014-06-03 | A kind of checknut fastening structure |
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| Country | Link |
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| CN (1) | CN204003910U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141670A (en) * | 2014-06-03 | 2014-11-12 | 宁波华路汽车电器有限公司 | Anti-loose thread fastening structure |
| CN105114436A (en) * | 2015-08-18 | 2015-12-02 | 孟周强 | Interlocked stop nut assembly |
| CN109915457A (en) * | 2018-04-07 | 2019-06-21 | 玉环胜友工具有限公司 | The bolts and nuts connection structure of the symmetrical two-way tapered thread of class dumbbell shaped |
-
2014
- 2014-06-03 CN CN201420290835.0U patent/CN204003910U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141670A (en) * | 2014-06-03 | 2014-11-12 | 宁波华路汽车电器有限公司 | Anti-loose thread fastening structure |
| CN105114436A (en) * | 2015-08-18 | 2015-12-02 | 孟周强 | Interlocked stop nut assembly |
| CN109915457A (en) * | 2018-04-07 | 2019-06-21 | 玉环胜友工具有限公司 | The bolts and nuts connection structure of the symmetrical two-way tapered thread of class dumbbell shaped |
| WO2019192571A1 (en) * | 2018-04-07 | 2019-10-10 | 玉环胜友工具有限公司 | Bolt and nut connection structure having dumbbell-like symmetrical bidirectional tapered thread |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230518 Address after: 314300 No.3 and 7 Jinggong Road, Yandong District, Wuyuan Industrial Park, Wuyuan street, Haiyan County, Jiaxing City, Zhejiang Province Patentee after: QIFENG PRECISION INDUSTRY SCI-TECH Corp. Address before: No. 232 Ningchuan West Road, Beilun Dagang Town, Ningbo City, Zhejiang Province, 315806 Patentee before: NINGBO HUALU AUTOMOBILE ELECTRICAL APPARATUS Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |
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| CX01 | Expiry of patent term |