CN204961539U - Annular eccentric nut - Google Patents

Annular eccentric nut Download PDF

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Publication number
CN204961539U
CN204961539U CN201520666730.5U CN201520666730U CN204961539U CN 204961539 U CN204961539 U CN 204961539U CN 201520666730 U CN201520666730 U CN 201520666730U CN 204961539 U CN204961539 U CN 204961539U
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CN
China
Prior art keywords
nut
annular
eccentric
annular groove
spron
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Active
Application number
CN201520666730.5U
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Chinese (zh)
Inventor
黄孝庆
何建平
高鹿鹿
刘智昂
郑晓冬
朱利军
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Aerospace Precision Products Co Ltd
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Aerospace Precision Products Co Ltd
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Priority to CN201520666730.5U priority Critical patent/CN204961539U/en
Application granted granted Critical
Publication of CN204961539U publication Critical patent/CN204961539U/en
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Abstract

The utility model provides an annular eccentric nut, nut central authorities are equipped with the screw hole, the axis of thread of screw hole with the perpendicular bisector of the bearing surface of nut has an eccentric contained angle, be equipped with on the bearing surface of nut inside extension with the coaxial annular spron of perpendicular bisector of bearing surface. The utility model discloses it is simple and easy that the creation has the structure, locking reliable, low cost, characteristics such as can dismantle repeatedly, is adapted to the locking of conventional mechanism, has fabulous economy and social.

Description

A kind of annular groove eccentric nut
Technical field
The invention belongs to anchor design and manufacturing technology field, particularly relates to a kind of annular groove eccentric nut with the flank of tooth.
Background technique
Be threaded have suitability strong, be easy to dismounting, reusable feature, be therefore widely used in all kinds of mechanical mechanism, its main failure mode is fatigue under cyclic load and from loosening.From loosen be threaded in vibratory impulse effect under, especially under alternation lateral load, the phenomenon that pretightening force is lost gradually.But the bolt that bolt and nut auxiliary connection causes when bearing alternation lateral load connects and loosens, and is a long-term an open question., extensively there is the loosening problem that is threaded in the industry-by-industry in mechanical industry.At present, the counter-measure the most often adopted in practical application periodically tights a bolt, to keep satisfactory pretightening force again.Due to the substantial amounts of the use of threaded connection pair, therefore this periodic maintaining is by the manpower and materials of at substantial.Therefore, adopt a kind of locking reliable, simple structure, the threaded connection pair that is easy to dismantle will produce fabulous economic and social benefit.
Whole metal self-locking nut and non-metallic insert self-locking nut is extensively adopted all to have excellent anti-loosening property in aerospace industry, but its repeat performance is not good, its processing technology relative complex simultaneously, cost of production is higher, Economy is bad, constrains it and promotes the use of on a large scale.
Summary of the invention
The invention, for solving the problems of the prior art, provides a kind of annular groove eccentric nut, has simple structure, locking reliable, with low cost, the feature such as repeatedly can to dismantle, be adapted to the locking of Conventional mechanisms, there is fabulous economic and social benefit.
A kind of annular groove eccentric nut that the invention provides, described nut central authorities are provided with tapped hole, the perpendicular bisector of the axis of thread of described tapped hole and the supporting surface of described nut has an eccentric angle, and the supporting surface of described nut is provided with the annular spron coaxial with the perpendicular bisector of described supporting surface extended internally.
Further, the cross section of described annular spron is preferably in class right-angled trapezium, in described class right-angled trapezium, one shorter in two limits be parallel to each other central near described nut, and the acute angle portion extending to described nut interior in described class right-angled trapezium is fillet.Preferably, the degree of depth that described annular spron extends in nut is the 1/3-4/5 of described height of nut.Preferred, the Extreme breadth of described annular spron be nut inward flange size 1/6 and following.Also preferred, the acute angle portion extending to described nut interior of the annular spron of described class right-angled trapezium is 30 ° ± 1 °.
Further, the head end of described nut is a tapered plane, namely with described supporting surface at an angle, the oblique angle of this head end is equal with described eccentric angle, can man-hour added with this head end for machining benchmark, auger shell pit and tapping, thus ensure the processing of eccentric angle.
Further, described eccentric angle is no more than 2 °, is preferably 1 ° ± 0.5 °.
Further, on the supporting surface of described nut, part between described tapped hole with annular spron is also provided with the annular concave platform be communicated with the two, and the supporting surface being positioned at its annular inner portion when preventing annular spron from playing a role is impact effect because of friction effect.
Further, the part supporting surface of described nut being positioned at described annular spron periphery is provided with the rib uniform around center, and preferably, described rib is overlooked on direction curved at supporting surface.
Wherein, the supporting surface of described nut refers to that nut end comes close to or in contact with the one side of workpiece to be tightened, and the another side relative with the supporting surface of described nut is the head end of nut.
Fastening and the locking principle of the invention is as follows:
Known by practice analysis, lateral impact loading is the main cause causing thread looseness, especially the tangential component of contact that lateral impact loading causes causes the microslip of screw thread very easily to cause bolt looseness, and eccentric the loosening of impacting force double thread formed has significant suppression, and under the effect of axial pre tightening force, demonstrate very excellent anti-loose ability.
(1) annular spron can make nut nut body edge in rundown process stressed, nut forms symmetrical upwards moment of flexure around the axis of thread, make nut generation resiliently deformable, thus the nut pitch of upper part is pressed to fitted bolt, simultaneously radially outer margin deformation bottom nut, release the partial load of the nut pitch of bottom, make each worm tooth of nut stressed relatively uniform, improve the bearing capacity of nut thread tooth.
(2) because nut thread axis and supporting surface vertical line have an eccentric angle, fitted bolt is in installation process, due to the effect of throw of eccentric, create the additional bending moment to fitted bolt, the moment of flexure acting in conjunction of annular spron formation as previously mentioned, make the carrying of all geared screw worm tooths be tending towards even, this and standard nut mainly front two enclose worm tooth and carry obviously different.Increasing of carrying worm tooth, rubbing surface increases, and produces actively impact to improving anti-loosening property.In addition, due to the effect of eccentric angle, be more screwed to nut end, eccentric force is larger, and the thread engagement of fitted bolt and nut is tightr, and nut thread withstands territory, bolt thread tooth base area as voussoir, creates eccentric wedging power, realizes locking further.
(3) in addition, the arc rib that nut seat is arranged, considerably increases the frictional force between nut and workpiece to be tightened.
The invention have employed multiple locking design, and on the basis of hexagon nut with collar, carry out locking step by step by the design of eccentric angle, annular spron and arc rib, product is reliably locking.The nut easy making process of the invention, structure is comparatively simple, and cost is lower, has significant Economy and wide application prospect.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of a kind of mode of execution of the invention;
Fig. 2 is that direction structure schematic diagram is looked up in the invention.
Wherein, 1-tapped hole; 2-supporting surface; 3-head end; The eccentric angle of 4-; 5-oblique angle; 6-annular spron; 7-annular concave platform; 8-rib.
Embodiment
Below by being further described the invention by reference to the accompanying drawings.
A kind of preferred embodiment of the invention structure as shown in Figure 1-2, for flange hexagon nut, nut central authorities are provided with tapped hole 1, the perpendicular bisector of the axis of thread of described tapped hole 1 and the supporting surface 2 of described nut has an eccentric angle 4, and the supporting surface 2 of described nut is provided with the annular spron 6 coaxial with the perpendicular bisector of described supporting surface 2 extended internally.
The cross section of described annular spron 6 is class right-angled trapezium, and in described class right-angled trapezium, one shorter in two limits be parallel to each other central near described nut, and the acute angle portion extending to described nut interior in described class right-angled trapezium is fillet.The degree of depth that described annular spron extends in nut is the 1/3-4/5 of described height of nut, and the width of described annular spron two parallel edges is 1/6 of flange hexagon nut opposite side size, and its acute angle portion extending to described nut interior is 30 ° ± 1 °.
The head end 3 of described nut is a tapered plane, namely with described supporting surface 2 at an angle, the oblique angle 5 of this head end 3 is equal with described eccentric angle 4.
Described eccentric angle 4 is no more than 2 °, is preferably 1 ° ± 0.5 °.
On the supporting surface 2 of described nut, the part between described tapped hole 1 with annular spron 6 is also provided with the annular concave platform 7 be communicated with the two, and the supporting surface being positioned at its annular inner portion when preventing annular spron from playing a role is impact effect because of friction effect.
The part supporting surface 2 of described nut being positioned at described annular spron 6 periphery is provided with the rib 8 uniform around center, and described rib 8 is overlooked on direction curved at supporting surface 2.
When the invention uses, the tapped hole 1 of fitted bolt by nut is screwed to inside workpiece to be tightened, makes one end of nut seat 2 prop up workpiece surface to be tightened, until completely fastening.
The foregoing is only the preferred embodiment of the invention; not in order to limit the invention; within all spirit in the invention and principle, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in the invention.

Claims (10)

1. an annular groove eccentric nut, described nut central authorities are provided with tapped hole, the perpendicular bisector of the axis of thread of described tapped hole and the supporting surface of described nut has an eccentric angle, and the supporting surface of described nut is provided with the annular spron coaxial with the perpendicular bisector of described supporting surface extended internally.
2. a kind of annular groove eccentric nut according to claim 1, it is characterized in that, the cross section of described annular spron is class right-angled trapezium, in described class right-angled trapezium, one shorter in two limits be parallel to each other central near described nut, and the acute angle portion extending to described nut interior in described class right-angled trapezium is fillet.
3. a kind of annular groove eccentric nut according to claim 1, is characterized in that, the degree of depth that described annular spron extends in nut is the 1/3-4/5 of described height of nut.
4. a kind of annular groove eccentric nut according to claim 1, is characterized in that, the Extreme breadth of described annular spron be nut inward flange size 1/6 and following.
5. a kind of annular groove eccentric nut according to claim 1, is characterized in that, the head end of described nut is a tapered plane, and the oblique angle of this head end is equal with described eccentric angle.
6. a kind of annular groove eccentric nut according to claim 1, is characterized in that, described eccentric angle is no more than 2 °.
7. a kind of annular groove eccentric nut according to claim 6, is characterized in that, described eccentric angle is 1 ° ± 0.5 °.
8. a kind of annular groove eccentric nut according to claim 1, is characterized in that, on the supporting surface of described nut, the part between described tapped hole with annular spron is also provided with the annular concave platform be communicated with the two.
9. a kind of annular groove eccentric nut according to claim 1, is characterized in that, the part supporting surface of described nut being positioned at described annular spron periphery is provided with the rib uniform around center.
10. a kind of annular groove eccentric nut according to claim 9, it is characterized in that, described rib is overlooked on direction curved at supporting surface.
CN201520666730.5U 2015-08-28 2015-08-28 Annular eccentric nut Active CN204961539U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520666730.5U CN204961539U (en) 2015-08-28 2015-08-28 Annular eccentric nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520666730.5U CN204961539U (en) 2015-08-28 2015-08-28 Annular eccentric nut

Publications (1)

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CN204961539U true CN204961539U (en) 2016-01-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105090219A (en) * 2015-08-28 2015-11-25 航天精工股份有限公司 Eccentric nut with circular groove
CN109099044A (en) * 2018-10-19 2018-12-28 湖南工业大学 A kind of bolt connection of third rail train pantagraph current collector slide plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105090219A (en) * 2015-08-28 2015-11-25 航天精工股份有限公司 Eccentric nut with circular groove
CN109099044A (en) * 2018-10-19 2018-12-28 湖南工业大学 A kind of bolt connection of third rail train pantagraph current collector slide plate

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