CN214499729U

CN214499729U - Anti-loose nut

Info

Publication number: CN214499729U
Application number: CN202120128121.XU
Authority: CN
Inventors: 刘启超
Original assignee: Individual
Current assignee: Hebei Crrc Luxing Anti Locking Technology Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-10-26
Anticipated expiration: 2031-01-18

Abstract

A locknut belongs to the technical field of fasteners and comprises a spiral hole, wherein a clamping groove is formed in the inner wall of the spiral hole, and a clamping piece and an elastic piece are arranged in the clamping groove; the clamping groove is an inclined clamping groove and consists of a groove bottom wall, an upper side wall, a lower side wall and a rear side wall; the clamping piece is a cylindrical clamping piece or a spherical clamping piece; the rear side wall and the clamping piece are respectively fixed by two ends of the elastic piece; the clamping through holes and the clamping column bars can be arranged for convenient disassembly; its beneficial effect is that after the nut twists the double-screw bolt, the fastener in the draw-in groove can elastically support the crack between the slot diapire of draw-in groove and the double-screw bolt external screw thread on the tight nut, with the nut chucking, makes the unable derotation laxity of nut, reaches the unable purpose that the pine takes off of unscrewing.

Description

Anti-loose nut

Technical Field

The utility model belongs to the technical field of the fastener, especially a prevent locknut who takes off because of vibrations.

Background

The common fasteners comprise a bolt and nut assembly, a stud and nut assembly, a screw and the like, wherein the nut is a polygonal cylinder provided with a central threaded hole, an inner thread is arranged on the inner annular wall of the central threaded hole and matched and screwed with an outer thread on the stud for fastening and connecting two or more fastened pieces with through holes.

The fastening of the nut and the bolt is generally relatively stable. However, if the fastened member is vibrated for a long time, the vibration frequency difference exists between the connecting members, so that each connecting member in the connecting structure can generate a certain displacement, the connection between the nut and the bolt becomes loose, and even falls off, and the stability and the safety of the operation of the connecting structure and even the whole device are affected. Taking the fastening screw and the nut on the train track as an example, when a train passes through the track at a certain speed, the fastening screw and the nut on the track can generate vibration with a certain frequency, so that the fastening screw and the nut can generate certain displacement, and the connection is loosened, therefore, on the old train track, a maintainer needs to overhaul regularly.

The current common mode for preventing the bolt from loosening is as follows: the double-nut pressing, the bolt and nut inserting key, the bolt and nut opening inserting metal rod, the iron wire winding looseness prevention, the bolt and nut clamping tooth meshing or direct gluing or welding and the like.

The applicant has long studied the anti-loosening technology, developed the clamp spring type clamping technology, and has applied for a series of patents in the previous period. But the prior series of patent products need the structure change by matching the stud and the nut, and need to be additionally provided with a locking part, so the operation is complex, the production is inconvenient, the practical application is not convenient,

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned defect, provide one kind and only need change the partial structure on the nut, with locking part pre-configuration in the nut, only need screw up the locknut that the nut can accomplish during the operation to prevent that the nut from taking place the derotation, the pine takes off even, improves the fastening effect.

In order to solve the technical problem, the utility model provides a technical scheme is a locknut, including the spiral hole, its characterized in that be equipped with the draw-in groove on the spiral hole inner wall, be equipped with elastic component and fastener in the draw-in groove.

The clamping groove is an inclined clamping groove, the inclined clamping groove is formed by digging an inclined side groove towards the inner wall of the spiral hole towards the loosening direction by taking the surface of the inner wall of the spiral hole as a starting point; the inclined side groove is composed of a groove bottom wall, an upper side wall, a lower side wall and a rear side wall, the inclined side groove is not provided with a front side wall, the front side wall and the groove bottom wall are combined into a whole, namely, the groove bottom wall extends upwards from the bottom of the rear side wall in an inclined mode until the groove bottom wall is intersected with the surface of a groove opening of the clamping groove, and the inclined clamping groove is formed.

The bottom wall of the groove is an arc curved groove bottom wall of an arc shape, an elliptic arc curved groove bottom wall of an elliptic arc shape, a straight plane groove bottom wall, or a straight plane groove bottom wall tangent with an inner annular wall of a circular spiral hole.

The clamping piece can be a strip column-shaped clamping piece, a square strip column or an irregular strip column, and can also be a wedge-shaped clamping piece, a cylindrical clamping piece, an oval-spherical clamping piece or a spherical clamping piece; preferably, cylindrical or spherical clips are used.

For the length specification of the outer diameter of the clamping piece, the distance from the bottom wall of the groove to the notch at the position where the distance from the rear side wall is equal to the radius of the clamping piece is greater than the outer diameter of the clamping piece; preferably, the outer diameter of the clamping piece is equal to two thirds of the distance from the bottom wall of the groove at the position with the distance equal to the radius of the clamping piece from the rear side wall to the notch; therefore, the clamping piece can freely move in the clamping groove and can be hidden in the deep position of the clamping groove and can also be exposed in the shallow position of the clamping groove.

The elastic piece is arranged in the clamping groove, namely an elastic piece is additionally arranged between the rear side wall and the clamping piece, one end of the elastic piece is fixedly arranged on the rear side wall, the other end of the elastic piece is fixedly arranged on the clamping piece, and the elastic piece is arranged in the clamping groove.

Like this because the elastic action of elastic component, the fastener of fixed mounting on the elastic component can tend to the narrow and small space between butt tank bottom wall and the double-screw bolt external screw thread all the time, when the nut carries out the forward and revolves, frictional force can be ejecting with the fastener, when the nut carries out the reverse rotation, frictional force can imbed the fastener in the narrow and small space between tank bottom wall and the double-screw bolt external screw thread for the unable reverse rotation of nut.

The elastic piece can be any one of materials such as a spring, elastic sponge, elastic glue and the like.

When the nut needs to be taken out for maintenance, a resisting and clamping through hole and a resisting and clamping column bar can be preset, namely a through hole penetrating to the upper end face of the nut is drilled at the position, close to the internal thread of the inner ring wall, of the upper side wall of the inclined clamping groove, the through hole is called as a resisting and clamping through hole, and the resisting and clamping column bar is inserted into the resisting and clamping through hole.

The length of the abutting clamping column strip is greater than the distance from the lower side wall of the inclined clamping groove to the upper end face of the nut; preferably, the length of the clamping supporting column bar is equal to three to ten times of the distance from the lower side wall of the inclined clamping groove to the upper end face of the nut, so that the clamping supporting column bar is convenient to operate by hands; the upper end face of the nut refers to the end face which is close to the upper side wall of the inclined clamping groove in the end faces at the two sides of the nut.

Further, the lower extreme that supports the card post strip is the slope pointed end, at first enters into the narrow and small space that comprises fastener, double-screw bolt external screw thread, tank bottom wall three when being convenient for insert, along with continuing to insert, the card post strip that supports of slope pointed end form can strut the fastener, at this moment, can the counter rotation take out the nut smoothly.

The abutting-clamping through hole can be any one of a round hole, a square hole, a diamond-shaped hole or a flat hole, and is correspondingly matched with the round hole, the square hole, the diamond-shaped hole or the flat hole, and the abutting-clamping column bar can be a corresponding one of a cylindrical bar, a square column bar, a diamond-shaped column bar or a flat column bar.

Preferably, the card abutting through hole is arranged to be a card abutting flat hole, the card abutting column strip is correspondingly arranged to be a card abutting strip, and the card abutting strip is a cuboid strip.

Furthermore, the lower end of the clamping piece abutting strip is an inclined tip, the clamping piece can be propped open by the inclined tip-shaped clamping piece abutting strip, and at the moment, the nut can be smoothly taken out through reverse rotation.

The inner ring wall between the upper side surface of the clamping groove and the upper end surface of the nut can be provided with internal threads or not.

When screwing in, the nut can be smoothly screwed into the stud without using a clamping column bar; the clamping piece can be more conveniently screwed in by inserting the abutting clamping column bar into the abutting clamping through hole to prop open the clamping piece, the abutting clamping column bar is taken out after being screwed, the clamping piece can abut between the external thread of the stud and the groove bottom wall of the clamping groove under the action of the elastic piece, and the clamping piece can be embedded between the external thread and the groove bottom wall to enable the nut to rotate reversely.

When the clamping device is detached, the clamping column bar is abutted to be inserted, the inclined tip can prop open the clamping piece, the clamping piece is pushed to the deep part of the clamping groove, the clamping piece is separated from the contact with the external thread of the stud, and the nut can be smoothly and reversely unscrewed.

Compared with the prior art, the utility model only arranges the clamping groove, the clamping piece, the elastic piece and the abutting clamping column bar in the nut, and has simple structure and convenient operation; the clamping piece is connected by the elastic piece and can elastically abut against a gap between the bottom wall of the clamping groove and the stud, so that the clamping piece can effectively clamp the nut and the nut cannot be reversely unscrewed; the nut can be smoothly fastened and disassembled by combining the abutting-clamping through hole and the abutting-clamping column strip.

Drawings

Fig. 1 is the overall structure schematic diagram of the locknut of the present invention.

Fig. 2 is a perspective structural diagram of the card slot in fig. 1.

Fig. 3 is the cross section structure diagram of the locknut at the slot position of the utility model, which has three slot structure conditions, namely, arc curved slot bottom wall, elliptical arc curved slot bottom wall and straight plane slot bottom wall.

Fig. 4 is a schematic view of an installation structure of the locknut and the stud in the embodiment.

In the figure: 1. the nut, 2. the spiral hole, 3. the internal thread, 4. the neck, 5. the fastener, 6. the oblique neck, 7. the trough bottom wall, 8. the upper sidewall, 9. the lower sidewall, 10. the back sidewall, 11. the arc curved surface trough bottom wall, 12. the arc curved surface trough bottom wall of ellipse, 13. the straight plane trough bottom wall, 15. the stud, 16. the elastic component, 17. the spring, 18. the through hole of holding, 19. the column strip of holding.

Detailed Description

The present invention is further described with reference to the following examples, which are intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, a locknut is manufactured, wherein existing nuts 1 are provided with spiral holes 2 at axial lead positions, and inner screw threads 3 are arranged on inner ring walls of the spiral holes 2 and are used for screwing in outer screw threads on studs 15 to fasten and connect fastened pieces; the utility model discloses dig on the inner ring wall of spiral hole 2 and be equipped with draw-in groove 4, be equipped with fastener 5 and elastic component 16 in draw-in groove 4, be equipped with on the terminal surface of nut 1 and support the fastener strip 19.

As shown in fig. 2, the locking groove 4 is an inclined locking groove 6, and the inclined locking groove 6 is formed by digging an inclined side groove towards the inner wall of the spiral hole 2 in the direction of loosening the internal thread, with the inner annular wall surface of the spiral hole 2 as a starting point; the inclined side groove is composed of a groove bottom wall 7, an upper side wall 8, a lower side wall 9 and a rear side wall 10, the inclined side groove has no front side wall, the front side wall can be considered to be integrated with the groove bottom wall 7, namely, the groove bottom wall 7 extends upwards from the bottom of the rear side wall 10 in an inclined mode until the groove bottom wall intersects with the notch surface of the clamping groove 4 to form the inclined clamping groove 6.

As shown in fig. 3, the groove bottom wall 7 may be an arc-shaped curved groove bottom wall 11, an elliptical arc-shaped curved groove bottom wall 12, or a straight-plane groove bottom wall 13; in this embodiment, the bottom wall of the groove is a curved groove bottom wall 11.

The clamping piece 5 can be a strip column-shaped clamping piece, a square strip column, an irregular strip column, a wedge-shaped clamping piece, a cylindrical clamping piece, an oval-ball-shaped clamping piece or a spherical clamping piece; in the embodiment, the clamping piece is made into a spherical clamping piece.

As for the outer diameter of the card member 5, the distance from the groove bottom wall 7 to the notch surface is larger than the outer diameter of the card member 5 at a position from the rear side wall 10 equal to the radius of the card member 5; this embodiment makes the outer diameter of the card member 5 equal to two thirds of the distance from the groove bottom wall 7 to the notch at a position equal to the radius of the card member 5 from the rear side wall 10.

The elastic member 16 is disposed in the inclined slot 6, as shown in fig. 1, an elastic member 16 is additionally disposed between the rear sidewall 10 and the clip 5, one end of the elastic member 16 is fixedly mounted on the rear sidewall 10, the other end of the elastic member 16 is fixedly mounted on the clip 5, and the elastic member 16 is disposed in the inclined slot 6.

Thus, due to the elastic action of the elastic piece 16, the clamping piece 5 fixedly arranged on the elastic piece 16 always tends to abut against a narrow space between the bottom wall 7 of the groove and the external thread of the stud, and when the nut 1 rotates forwards, the friction force can push out the clamping piece 5, so that the nut can be smoothly screwed in; when the nut 1 rotates reversely, the clamping piece 5 is embedded into a narrow space between the bottom wall 7 of the groove and the external thread of the stud by friction force, so that the nut 1 cannot rotate reversely.

The elastic element 16 can be a spring 17, and can also be elastic sponge or elastic glue, etc.; this embodiment employs a spring 17.

When the nut 1 needs to be taken out for maintenance, a resisting and clamping through hole 18 and a resisting and clamping column bar 19 can be further preset, as shown in fig. 1, namely, a through hole penetrating to the outer end face of the nut 1 is drilled at a position, close to the inner ring wall internal thread 3, of the upper side wall 8 of the inclined clamping groove 6, the through hole is called as a resisting and clamping through hole 18, the resisting and clamping column bar 19 is inserted into the resisting and clamping through hole 18, and the length of the resisting and clamping column bar 19 is larger than the distance from the lower side wall 9 of the inclined clamping groove 6 to the upper end face of the nut; the length of the clamping resisting column strip 19 can be made to be equal to five times of the distance from the lower side wall 9 of the inclined clamping groove 6 to the upper end face of the nut, so that the clamping resisting column strip is convenient to hold by hands; the nut upper end surface refers to the end surface closest to the upper side wall 8 of the inclined clamping groove 6 in the end surfaces at the two sides of the nut 1.

The lower end of the abutting clamping column bar 19 is made into a conical inclined tip, so that the lower end of the abutting clamping column bar can firstly enter a narrow gap formed by the clamping piece 5, the external thread of the stud and the bottom wall 7 when being inserted, the inclined tip-shaped abutting clamping column bar 19 can prop open the clamping piece 5 along with the continuous insertion of the abutting clamping column bar 19, and at the moment, the nut 1 can be smoothly taken out through the reverse rotation.

The abutting-clamping through hole 18 can be one of a round hole, a square hole, a diamond-shaped hole or a flat hole, and correspondingly, the abutting-clamping column bar 19 can be a cylindrical bar, a square column bar, a diamond-shaped column bar or a flat column bar.

In the embodiment, the card abutting through hole 18 is set to be a card abutting flat hole, the card abutting column strip 19 is correspondingly set to be a card abutting strip, the card abutting strip is a cuboid strip, and the lower end of the card abutting strip is made to be an inclined tip.

As shown in fig. 4, during screwing, the nut 1 can be smoothly screwed into the stud 15 without using the holding bar 19; the abutting clamping column bar 19 can be inserted into the abutting clamping through hole 18, the clamping piece 5 is expanded and can be screwed in more conveniently, after the abutting clamping column bar 19 is screwed, the clamping piece 5 can abut between the external thread of the stud and the groove bottom wall 7 of the clamping groove 4 under the action of the elastic piece 16, and then the clamping piece 5 can be embedded between the external thread and the groove bottom wall 7 by screwing, so that the nut 1 cannot be rotated reversely.

Claims

1. A locknut comprises a spiral hole and is characterized in that a clamping groove is formed in the inner wall of the spiral hole, and an elastic part and a clamping part are arranged in the clamping groove;

the clamping groove is an inclined clamping groove, the inclined clamping groove takes the surface of the inner wall of the spiral hole as a starting point, and an inclined side groove is dug towards the inside of the side wall of the nut in the unscrewing direction; the inclined side groove is composed of a groove bottom wall, an upper side wall, a lower side wall and a rear side wall, wherein the groove bottom wall extends upwards from the bottom of the rear side wall in an inclined mode until the groove bottom wall is intersected with the surface of a notch of the clamping groove to form an inclined clamping groove;

one end of the elastic piece is fixedly arranged on the rear side wall, and the other end of the elastic piece is fixedly arranged on the clamping piece.

2. The locknut of claim 1, wherein said slot bottom wall is any one of a circular arc curved slot bottom wall, an elliptical arc curved slot bottom wall, and a straight plane slot bottom wall.

3. The locknut of claim 2, wherein the fastener is any one of a cylindrical fastener, a wedge-shaped fastener, a cylindrical fastener, an oval-spherical fastener, and a spherical fastener.

4. The locknut of claim 3, characterized in that the elastic member is any one of a spring, an elastic sponge, and an elastic glue.

5. The locknut of claim 4, wherein a through hole with a flat section penetrating to the outer end face of the nut is drilled on the upper side wall of the inclined clamping groove at a position close to the internal thread of the inner annular wall, the through hole is called a resisting and clamping through hole, and a resisting and clamping column is inserted into the resisting and clamping through hole.

6. The locknut of claim 5 wherein the lower end of the retaining bar is a beveled tip.

7. The locknut of claim 6, wherein the card-resisting through hole is a card-resisting flat hole, the corresponding card-resisting column strip is a card-resisting strip, and the card-resisting strip is a rectangular strip.