CN202370975U

CN202370975U - Nut

Info

Publication number: CN202370975U
Application number: CN2011204828060U
Authority: CN
Inventors: 励国庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-29
Filing date: 2011-11-29
Publication date: 2012-08-08
Anticipated expiration: 2021-11-29

Abstract

The utility model discloses a nut with an internal thread. A check ring is arranged at the front end of the nut and consists of wavy check teeth which are repeatedly formed on the inner circumference. The check ring can be matched with a bolt part, the aim of preventing the check ring and the bolt part from rotating reversely is fulfilled, and the bolt part can be designed variously to be matched with the nut.

Description

A kind of nut

Technical field

The utility model belongs to the mechanical parts technical field, relates in particular to a kind of nut.

Background technique

Nut is modal mechanical parts, and it generally has internal thread, and has externally threaded bolt and cooperates to accomplish and be connected.Concerning this series products, distinct issues are how to prevent that it from unclamping.In the bolt and nut working procedure, might receive lasting vibrations, because of different expansivitys produces the gap, or other various situation cause connect producing loosening in the time of also might expanding with heat and contract with cold.The most frequently used way is between screw bolt and nut, to place elastic washer in the existing technology, is out of shape behind the packing ring pressurized, produces an axial power, thereby prevents that nut from circumferential motion taking place.The elastic force of packing ring is vertical with the nut movement tendency in this case, and anti-loosing effect is not good; And the elastic washer easy ageing follows the string, and has not also just had locking effect.

Chinese patent CN2536834 discloses a kind of locking self-locking thread; Improve at the bottom of its double thread tooth and the inclination angle between the crest; The thread profile of screw bolt and nut is fixed on 60 degree; To eliminate the gap between Bottom of Thread and the crest, it is even to make that whole screw thread clamps load allocating, improves anti-loosening property.The shortcoming of this scheme is high to the requirement of machining accuracy, and difficulty of processing strengthens, in case the screw bolt and nut tooth form of producing does not reach the angle of regulation, does not just have anti-loosing effect.Simultaneously, it is also too high to the requirement of installation environment, if there are foreign material to get in the screw thread in the installation process, this design is also just nonsensical.

Summary of the invention

The purpose of the utility model provides a kind of nut, can reach locking purpose long-term effectively.

For this reason, the technological scheme that the utility model adopts is such: a kind of nut, have internal thread, and it is characterized in that: its front end has Non-return ring, and described Non-return ring is made up of the wavy locking tooth of repeated arrangement on the inner circumference.

Further, described each wavy locking tooth is made up of a long limit and a minor face, thereby has two end points and a summit, and two end points are identical apart from the distance in the center of circle, greater than the distance of summit far from the center of circle; The line in two end points and the center of circle lays respectively at the line both sides in the summit and the center of circle, and forms two angles, and the angle at a wherein less angle is less than 10 °.

The Non-return ring of the utility model can cooperate with bolt member, plays the purpose that prevents both counter-rotatings, and bolt member can have multiple design to match with the utility model.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed description.

Fig. 1 is the present embodiment structural representation.

Fig. 2 is a present embodiment C-C sectional view.

Fig. 3 is the nut structure schematic representation.

Fig. 4 is a nut D-D sectional view.

Fig. 5 is a nut D-D cross section partial structurtes schematic representation.

The chip architecture that extracts till Fig. 6 schematic representation.

Sheet A-A sectional view extracts till Fig. 7.

Sheet B-B sectional view extracts till Fig. 8.

Among the figure:

1, bolt member 2, nut 3, stopping shell fragment 11, draw-in groove 12, outside thread 21, Non-return ring

22, locking tooth 23, internal thread 31, stopping shell fragment bottom 32, stopping shell fragment top 33, stopping shell fragment kink 34, stopping shell fragment tongue piece 35, stopping shell fragment locating point 36, stopping shell fragment top margin 37, stopping shell fragment upper end.

Embodiment

Referring to accompanying drawing.Present embodiment comprises a bolt member 1 and a nut 2, and described bolt member 1 has outside thread 12 at the one of which end, and described nut 2 has internal thread 23.Bolt member 1 respectively is provided with a stopping shell fragment 3 having on the circumferencial direction of outside thread 12 rear end in 11, two draw-in grooves 11 of two draw-in grooves that are centrosymmetric.The front end of nut 2 also has Non-return ring 21, and Non-return ring 21 is made up of the wavy locking tooth 22 that has repeated arrangement on the inner circumference; Each wavy locking tooth 22 is made up of a long limit EG and a minor face FG, has the first end points E, the second end points F and summit G; Wherein, The first end points E is identical apart from the distance of Non-return ring 21 center of circle O with the second end points F; Greater than the distance of summit G apart from Non-return ring 21 center of circle O, thereby make the first end points E, the second end points F and summit G constitute △ EFG, ∠ GEF is that 10 degree, ∠ EFG are 85 degree among this △ EFG; It is the chamfering 24 of 60 degree that the front end of Non-return ring 21 has on the circumferencial direction inwardly indentation, and chamfering 24 forms because of the outside of Non-return ring 21 front ends is higher than inner edge.

Said stopping shell fragment 3 has the sheet noumenon that a cross section is a broken line, and its top and the bottom form the knuckle of about 160 degree, and bottom 31 places in the draw-in groove 11, and draw-in groove 11 is stretched out on top 32; Bottom 31 has the locating point 35 of two convexities and the tongue piece 34 of perk, and the thickness of stopping shell fragment 3 at locating point 35 places equals draw-in groove 11 thickness, stopping shell fragment 3 at the thickness of tongue piece 34 perks place greater than draw-in groove 11 thickness; One side of stopping shell fragment 3 upper ends 37 has the kink 33 that bends inwards, and the knuckle that this kink 33 forms is about 120 degree.

Present embodiment in use; The bottom 31 of stopping shell fragment 3 is inserted in the draw-in groove 11; Because of stopping shell fragment 3 at the thickness of tongue piece 34 perks place greater than draw-in groove 11 thickness; So insert in the process of draw-in groove 11 bottom 31 at stopping shell fragment 3, tongue piece 34 perks place can receive the squeezing action of draw-in groove 11 and inwardly compress gradually, in tongue piece 34 gets into draw-in groove 11 fully; At this moment; Tongue piece 34 just can make its perk place be against firmly on the inwall of draw-in groove 11 under the elastic force effect that itself has, thereby makes the bottom 31 of stopping shell fragment 3 can receive the conflict effect between tongue piece 34 perks place and draw-in groove 11 inwalls; Be fixed in the draw-in groove 11, be difficult for being pulled out.

When nut 2 rotates in the direction of the clock, when meshing with bolt member 1, indentation is the chamfering 24 of 60 degree because of the front end of nut 2 inwardly has on the circumferencial direction; And a side of stopping shell fragment 3 upper ends 37 has and bends inwards; Its knuckle is about the kink 33 of 120 degree, thus can be after a side contacts of the front end of nut 2 and stopping shell fragment 3 upper ends 37, and the kink 33 of stopping shell fragment 3 upper ends 37 can be close to chamfering 24; And in the process that nut 2 rotates in the direction of the clock; Receive the extruding of chamfering 24 and inwardly compression, progressively slip in the Non-return ring 21 of nut 2, this moment, stopping shell fragment 3 top margin 36 just in time was against on the Non-return ring 21 wherein on the first end points E of a locking tooth 22.From the first end points E in the gradient sliding process along long limit EG, long limit EG can produce certain pressure to stopping shell fragment 3 at the top margin 36 of stopping shell fragment 3, make stopping shell fragment 3 along the gradient of long limit EG by inwardly compression gradually; Simultaneously; Because of ∠ GEF among the △ EFG is 10 degree; Can know that long limit EG has less gradient, because the resistance of more little its generation of gradient on limit is also more little, so the top margin 36 of stopping shell fragment 3 can be through long limit EG under less external force effect; Slide into summit G and cross summit G, outwards slide into the second end points F gradually along the gradient of minor face FG.After nut 2 rotation puts in place, the elastic force effect that stopping shell fragment 3 has because of itself, Non-return ring 21 is close on its

top

32, and 36 of its top margins just in time are positioned on the Non-return ring 21 wherein on the second end points F of a locking tooth 22, and are against firmly on the minor face FG; At this moment; Because of ∠ EFG among the △ EFG is 85 degree; Can know that minor face FG has bigger gradient, because the big more resistance that produces of gradient on limit is also just big more, so the top margin 36 of stopping shell fragment 3 can be under the resistance interaction of elastic force that itself has and minor face FG generation; After bolt member 1 and nut 2 meshed, making both not be subject to external force influenced and becomes flexible.

Present embodiment is because of inspection or maintenance; In the time of need dismantling bolt member 1 and nut 2; Only need inwardly to push stopping shell fragment 3 through instrument, make the top 32 of stopping shell fragment 3 inwardly compressed by the external force effect, its top margin 36 is away from minor face FG; Just can nut 2 be backed out from bolt member 1 by counter clockwise direction swivel nut 2 this moment.

Present embodiment is under the situation of the top of stopping shell fragment 3 32 pressurizeds; Because the thickness of stopping shell fragment 3 at locating point 35 places equals draw-in groove 11 thickness; So can under the supporting effect of locating point 35, make the bottom 31 of stopping shell fragment 3 keep stable, not receive the influence of its top 32 pressurizeds.

Claims

1. a nut has internal thread, it is characterized in that: its front end has Non-return ring, and described Non-return ring is made up of the wavy locking tooth of repeated arrangement on the inner circumference.

2. a kind of nut as claimed in claim 1 is characterized in that: described each wavy locking tooth is made up of a long limit and a minor face, thereby has two end points and a summit, and two end points are identical apart from the distance in the center of circle, greater than the distance of summit far from the center of circle; The line in two end points and the center of circle lays respectively at the line both sides in the summit and the center of circle, and forms two angles, and the angle at a wherein less angle is less than 10 °.