CN112483533A

CN112483533A - Anti-loose nut

Info

Publication number: CN112483533A
Application number: CN202110064387.7A
Authority: CN
Inventors: 刘启超
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-03-12

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 is 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; an elastic piece and a propping and clamping column strip are additionally arranged, and the rear side wall and the clamping piece are respectively fixed at two ends of the elastic piece; or additionally arranging a ring-opening clamp spring, a clamp spring ring groove and a spring pulling column strip, wherein one end of the ring-opening clamp spring is a positioning pin and is inserted into a positioning hole in the side wall of the ring groove, the other end of the ring-opening clamp spring is fixedly provided with a clamping piece and is arranged in the clamping groove, and the ring-opening clamp spring is arranged in the clamp spring ring groove; 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 invention belongs to the technical field of fasteners, and particularly relates to a locknut capable of preventing looseness caused by vibration.

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. However, the series of patent products applied in the earlier stage need the matching of the stud and the nut to change the structure, and need to be additionally provided with a locking part, so that the operation is complex, the production is inconvenient, and the practical application is inconvenient.

Disclosure of Invention

The invention aims to solve the technical problem of providing the locknut which can be completed by only changing part of the structure on the nut, arranging the locking part in the nut in advance and tightening the nut during operation so as to prevent the nut from reversely rotating or even loosening and improve the fastening effect.

In order to solve the technical problem, the invention adopts the technical scheme that the locknut comprises a spiral hole and is characterized in that a clamping groove is arranged on the inner wall of the spiral hole, and a clamping piece is arranged in the clamping 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.

During the use, shelve the fastener in the draw-in groove earlier, again with the nut screw in on the double-screw bolt, when screwing in, screw in smoothly, when the derotation spiral, the fastener can automatic chucking between the external screw thread of double-screw bolt and tank bottom wall for the nut can't reverse the pine of unscrewing.

For the anti-loosening structure only provided with the clamping piece and the clamping groove, in the using process, the clamping piece is unstable in the clamping groove and cannot completely clamp the nut and the stud, an elastic piece is additionally arranged from the above, 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 extreme that supports the card 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 strip that supports of slope pointed end form can strut the fastener, at this moment, can the counter rotation take out the nut smoothly.

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.

According to the scheme, the small gap formed by the clamping piece, the stud external thread and the groove bottom wall is small, so that the clamping piece is difficult to push away sometimes after the clamping column bar is correspondingly made too small for a bolt fastener with a small specification, and the structure is not suitable for the fastener with a small specification.

From this another scheme of setting up, add promptly and establish a ring and lack the jump ring, the ring lacks the jump ring and is lacked the ring by the circle of the notched circle of elastic material preparation, and the one end of this circle lacks the ring is provided with the planar location foot of perpendicular to circle and lacked the ring, and the other end is fixed with towards the planar fastener of same orientation perpendicular to circle and lacked the ring, and the external diameter of fastener is greater than the line diameter of circle and lacked the ring.

Simultaneously spiral hole inner wall digs along the last lateral wall of draw-in groove on the surface and is equipped with the jump ring annular, promptly the jump ring annular dig establish on the spiral hole inner ring wall of nut, constitute by annular diapire, lower annular lateral wall and last annular lateral wall, wherein lower annular lateral wall merges the last lateral wall of slope form draw-in groove for go up the lateral wall and go up the lower annular lateral wall vacancy of lateral wall position.

And meanwhile, a positioning hole is drilled at the position, close to the rear side wall of the inclined clamping groove, of the side wall of the lower annular groove, a positioning pin at one end of the annular gap clamping spring is inserted into the positioning hole, and the clamping piece at the other end of the annular gap clamping spring is placed in the inclined clamping groove.

Because the ring lacks the elastic action of jump ring like this, the fastener of fixed mounting on the ring lacks the jump ring 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.

When the nut needs to be taken out for maintenance, the spring-pulling through hole and the spring-pulling column bar can be preset, namely, a through hole penetrating through the upper end face of the nut is drilled in the position, symmetrical to the rear side wall, of the side wall of the upper ring groove, and the through hole is called as a spring-pulling through hole.

The symmetry refers to symmetry relative to the circle center of the clamp spring ring groove, and the axial lead of the spring pulling through hole is parallel to the axial lead of the clamp spring ring groove.

And a poking spring column bar capable of passing through a poking spring through hole is additionally arranged, and the poking spring column bar is inserted into the poking spring through hole.

The end of the poking spring column strip is a conical inclined tip end, so that the poking spring column strip is more convenient to insert and push the ring-lacking clamp spring towards the opposite side.

The poking spring through holes can be any one of round holes, square holes, rhombic holes or flat holes and are correspondingly matched, and the poking spring column bars are corresponding ones of cylindrical bars, square column bars, rhombic column bars or flat column bars.

The length of the spring poking column bar is greater than the distance from the side wall of the lower annular groove to the upper end face of the nut; preferably, the length of the spring poking column bar is equal to three to ten times of the distance from the side wall of the lower annular groove to the upper end face of the nut.

Further, the ring lacks and is equipped with interior bay portion on the position that corresponds on the jump ring and dial the spring through-hole, this interior bay portion is convenient for dial the spring column and inserts to insert through the insertion of the most advanced end of slope form lack the jump ring and impel to offside direction, make the fastener pushed the draw-in groove depths, make the fastener not hinder the forward and reverse spiral of nut, after drawing and dialling the spring column, the ring lacks the jump ring and is the expanding ring form, can be taut as far as possible with the fastener, make the fastener card between double-screw bolt external screw thread and tank bottom wall, the nut can't loosen soon.

Furthermore, the ring-lacking clamp spring is arranged to be a straight rod part at the section of the connecting clamp piece, so that the clamp piece cannot be too far away from the stud after the clamp piece is ejected out, and the depth of the deepest part of the bottom wall of the clamping groove can be reduced.

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.

The locknut has two fastening methods, one is that the locknut is not dug with a poking spring through hole or a resisting and clamping through hole, or even if the poking spring through hole or the resisting and clamping through hole is dug, a poking spring column bar or a resisting and clamping column bar is not arranged, so the locknut is directly screwed into the stud according to the common method, and the locknut cannot be reversely screwed.

And the other method is that a poking spring column strip is pre-arranged on each anti-loose nut, the nuts are screwed down according to a common method, after the nuts are screwed down, the poking spring column strips are taken down, the ring is elastically expanded due to the lack of the snap springs, the clamping piece is tensioned, the clamping piece is clamped between the external thread and the bottom wall of the groove, and the nuts cannot be unscrewed.

The dismounting method of the locknut is characterized in that the spring shifting column bar is inserted, the tip end of the inclined end can support the ring-lacking clamp spring tightly to the opposite direction of the clamping groove, so that 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 invention has the following beneficial effects.

The nut is only provided with the clamping groove and the clamping piece, so that the structure is simple and the operation is convenient; only adopt the fastener can be with nut and double-screw bolt chucking, can effectively prevent that the nut from derotating laxity.

Secondly, the elastic piece is adopted to connect the clamping piece and enable the clamping piece to 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.

Thirdly, the clamping piece is connected by adopting a ring-cut clamp spring and clamp spring ring groove structure, and the clamping piece 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, the nut cannot be unscrewed reversely, and the nut can be suitable for nuts of any specification; the nut can be smoothly fastened and disassembled by combining the poking spring through hole and the poking spring column bar.

Drawings

Fig. 1 is a basic structural 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 a schematic cross-sectional structure diagram of the locknut of the present invention at the slot position, which has three slot structure cases, namely, a circular arc curved slot bottom wall, an elliptical arc curved slot bottom wall and a straight plane slot bottom wall.

Fig. 4 is a schematic structural diagram of one of various structures of the cartridge of the present invention, namely a cylindrical cartridge.

Fig. 5 is a schematic view of an installation structure of the locknut and the stud in embodiment 1.

Fig. 6 is a schematic structural view of the locknut with an elastic member in embodiment 2.

Fig. 7 is a schematic view of an installation structure of the locknut and the stud in embodiment 2.

Fig. 8 is a schematic structural view of the circlip in ring-out in embodiment 3.

Fig. 9 is a cross-sectional structure view and a combined exploded structure view of the locknut in which the snap spring lacking the ring and the snap spring ring groove are adopted in the embodiment 3 at the snap spring ring groove portion.

Fig. 10 is a schematic view of the overall structure of the locknut in embodiment 3.

Fig. 11 is a schematic structural view of a striking spring bar in embodiment 3.

Fig. 12 is a schematic structural diagram of a circlip with an inward-bent part and a straight rod part.

Fig. 13 is a schematic view of an installation structure of a locknut and a stud in embodiment 3.

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 circular arc curved surface trough bottom wall, 12. the elliptic arc curved surface trough bottom wall, 13. the straight plane trough bottom wall, 14. the cylindrical fastener, 15. the double-screw bolt, 16. the elastic component, 17. the spring, 18. the through hole of the resisting clip, 19. the resisting clip column bar, 20. the ring lacks the jump ring, 21. the ring lacks the ring, 22. the locating foot, 23. the jump ring annular groove, 24. the annular groove bottom wall, 25. the lower annular groove sidewall, 26. the upper annular groove sidewall, 27. the locating hole, 28. the through hole of the set spring, 29. the set spring column bar, 30. the inner bay portion, 31.

Detailed Description

The present invention is further illustrated by the following examples, which are intended to illustrate the invention but not to limit it further, and should not be construed as limiting the scope of the invention.

Example 1.

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; in the invention, a clamping groove 4 is dug on the inner ring wall of the spiral hole 2, and a clamping piece 5 is arranged in the clamping groove 4.

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 or an irregular strip column, and can also be a wedge-shaped clamping piece, a cylindrical clamping piece 14, an oval sphere-shaped clamping piece or a spherical clamping piece; as shown in FIG. 4, the clip of the present embodiment is formed as a cylindrical clip 14.

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.

As shown in fig. 5, when the clamping device is used, the clamping piece 5 is firstly placed in the clamping groove 4, then the nut 1 is screwed into the stud 15, when the clamping device is screwed in, the clamping piece can be smoothly screwed in, and when the nut is screwed out reversely, the clamping piece 5 can be automatically clamped between the external thread of the stud 15 and the bottom wall 7 of the groove, so that the nut 1 cannot be screwed out and unscrewed reversely.

Example 2.

For the locknut structure only comprising the clamping piece 5 and the clamping groove 4, in the use process, the position of the clamping piece 5 in the clamping groove 4 is unstable, the clamping piece 5 cannot be completely ensured to clamp the nut 1 and the stud 15, and therefore, an elastic piece 16 is additionally arranged, as shown in fig. 6, an elastic piece 16 is additionally arranged between the rear side wall 10 and the clamping piece 5, one end of the elastic piece 16 is fixedly arranged on the rear side wall 10, the other end of the elastic piece 16 is fixedly arranged on the clamping piece 5, and the elastic piece 16 is arranged in the inclined clamping groove 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. 6, namely, a through hole penetrating to the outer end face of the nut 1 is drilled at the 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 greater 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. 7, 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.

Example 3.

In the scheme, the small gap formed by the clamping piece 5, the external thread of the stud and the groove bottom wall 7 is small, so that the clamping piece 5 is difficult to push away sometimes after the clamping column bar 19 is correspondingly made too small for a bolt fastener with a small specification, and the structure is not suitable for fasteners with small specifications.

From this another scheme sets up, add on the basis of embodiment 1 and establish a ring and lack jump ring 20, as shown in fig. 8, ring and lack jump ring 20 is the circle that the circle with the breach of being made by elastic material constitutes and lacks the ring 21, and one end of this circle lacks the ring 21 is provided with the planar location foot 22 of perpendicular to circle and lacks ring 21, and the other end is fixed with towards the planar fastener 5 of same direction perpendicular to circle and lacks ring 21, and the external diameter of fastener 5 is greater than the line diameter of the material of preparation circle and lacks ring 21, is convenient for circle and lacks ring 21 not influence fastener 5 and blocks nut 1 and stud 15 like this.

Simultaneously 2 inner wall surfaces of spiral hole 2 go up 8 dug along the last lateral wall of draw-in groove 4 and be equipped with jump ring annular 23, as shown in fig. 9, jump ring annular 23 is dug and is established on 2 inner ring walls of spiral hole of nut 1, comprises annular diapire 24, lower annular lateral wall 25 and upper ring groove lateral wall 26, and wherein lower annular lateral wall 25 merges the last lateral wall 8 of slope form draw-in groove 6 for go up lateral wall 8 and last lateral wall 8 position's lower annular lateral wall 25 vacancy.

Meanwhile, a positioning hole 27 is drilled in the position, close to the rear side wall 10 of the inclined clamping groove 6, of the side wall 25 of the lower annular groove, a positioning pin 22 at one end of the annular clip spring 20 is inserted into the positioning hole 27, and the clamping piece 5 at the other end is placed in the inclined clamping groove 6.

Because the ring lacks the elastic action of jump ring 20 like this, fastener 5 of fixed mounting on ring lacks jump ring 20 can tend to the narrow and small space between butt tank bottom wall 10 and the double-screw bolt external screw thread all the time, when nut 1 carries out forward when revolving, frictional force can be ejecting fastener 5, make forward spiral normally go on, when nut 1 carries out the reverse rotation, frictional force combines the elasticity that the ring lacks the jump ring can imbed fastener 5 in the narrow and small space between tank bottom wall 10 and the double-screw bolt external screw thread for nut 1 can't the reverse rotation.

When the nut 1 needs to be taken out for maintenance, the poking spring through hole 28 and the poking spring column 29 can be preset, as shown in fig. 10, that is, a poking spring through hole 28 penetrating through the outer end face of the nut 1 is drilled on the upper annular groove side wall 26 at a position symmetrical to the rear side wall 10.

The symmetry refers to symmetry relative to the center of the clamp spring ring groove 23, and the axial line of the spring pulling through hole 28 is parallel to the axial line of the clamp spring ring groove 23.

A poking spring column bar 29 capable of passing through the poking spring through hole 28 is additionally arranged, and the poking spring column bar 29 is inserted in the poking spring through hole 28.

The poking spring through holes 28 can be one of round holes, square holes, rhombic holes or flat holes, and correspondingly, the poking spring column bars 29 can be cylindrical bars, square column bars, rhombic column bars or flat column bars.

As shown in fig. 11, the end of the toggle spring bar 29 is a tapered inclined tip end, so that the insertion and the abutting of the circlip 20 are facilitated, the clip 5 enters the deep portion of the slot 4, and the rotation of the nut 1 is facilitated.

Further, as shown in fig. 12, the ring-lacking snap spring 20 is provided with an inner bay 30 at a position corresponding to the spring-pulling through hole 28, the inner bay 30 is convenient for inserting the spring-pulling bar 29, and the ring-lacking snap spring 20 is tightly abutted by the insertion of the inclined tip end, so that the clamping piece 5 is pushed to the deep part of the clamping groove without interfering with the forward and reverse spiral of the nut 1, after the spring-pulling bar 29 is pulled out, the ring-lacking snap spring 20 is in an expanded ring shape due to elasticity, and the clamping piece 5 is tensioned as much as possible and clamped between the external screw thread of the stud and the bottom wall 7 of the groove, so that the nut 1 cannot be unscrewed.

In addition, the ring-cut snap spring 20 is arranged to be the straight rod part 31 at the section connecting the clamping piece 5, so that the clamping piece 5 does not need to be far away from the stud 15 after the clamping piece 5 is ejected, and the depth of the deepest part of the groove bottom wall 7 of the clamping groove 4 can be reduced.

During the use, as shown in fig. 13, at first will dial spring stylobate 29 and insert to make and dial spring stylobate 29 and withstand ring and lack jump ring 20, make ring and lack jump ring 20 and push fastener 5 to the inside depths of draw-in groove 4, then screw up nut 1 according to ordinary method, screw up the back, take off and dial spring stylobate 29, ring and lack jump ring 20 can elasticity expand the ring, take up fastener 5, make fastener 5 block between external screw thread and tank bottom wall 7, nut 1 can't loosen soon.

During the dismantlement, will dial spring post strip 29 and insert again, the tip of slope form can be opened the ring and lack jump ring 20 and support tightly to the 4 directions of contralateral draw-in grooves for fastener 5 is pushed the draw-in groove 4 depths, breaks away from the contact with the double-screw bolt external screw thread, and nut 1 can reverse the pine of unscrewing smoothly.

Claims

1. The utility model provides a locknut, includes the screw hole, its characterized in that be equipped with the draw-in groove on the screw hole inner wall, be equipped with the fastener in the draw-in groove.

2. The locknut of claim 1, wherein the locking groove is an inclined locking groove, the inclined locking groove is formed by digging an inclined side groove towards the inside of the side wall of the nut towards the unscrewing direction with 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, 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 notch surface of the clamping groove to form the inclined clamping groove.

3. The locknut of claim 2, 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.

4. The locknut of claim 3, 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.

5. The locknut of claims 1-4, further comprising an elastic member, one end of the elastic member is fixedly mounted on the rear sidewall, and the other end is fixedly mounted on the clamping member.

6. The locknut of claim 5, further comprising a retaining through hole and a retaining post, 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 ring wall, and the through hole is called a retaining through hole; and a clamping column bar is inserted into the clamping through hole.

7. The locknut according to claims 1-4, characterized by further comprising a ring-segment snap spring, wherein the ring-segment snap spring is a circular-segment ring formed by a ring with a gap made of elastic material, one end of the circular-segment ring is provided with a positioning pin perpendicular to the plane of the circular-segment ring, the other end of the circular-segment ring is fixed with a clamping piece, and the outer diameter of the clamping piece is larger than the wire diameter of the circular-segment ring;

meanwhile, a snap spring ring groove is dug in the inner wall surface of the spiral hole along the upper side wall of the clamping groove, namely the snap spring ring groove is dug in the inner annular wall of the spiral hole of the nut and consists of a ring groove bottom wall, a lower ring groove side wall and an upper ring groove side wall;

and meanwhile, a positioning hole is drilled in the position, close to the rear side wall of the inclined clamping groove, of the side wall of the lower annular groove, a positioning pin at one end of the annular gap clamping spring is inserted into the positioning hole, and the clamping piece at the other end of the annular gap clamping spring is placed in the inclined clamping groove.

8. The locknut of claim 7, wherein a toggle spring through hole penetrating through the outer end surface of the nut is drilled in the side wall of the upper ring groove at a position symmetrical to the rear side wall; and a toggle spring column bar is inserted into the toggle spring through hole.

9. The locknut of claim 8 wherein the ends of said striking spring bars are tapered.

10. The locknut of claim 9, wherein the circlip of the ring segment is provided with an inward bay at a position corresponding to the through hole of the toggle spring.