CN214304806U - Anti-loose nut - Google Patents

Abstract

A locknut belongs to the technical field of fasteners and comprises a spiral hole, wherein a clamping groove and a clamp spring ring groove are formed in the inner wall of the spiral hole, a clamping piece is arranged in the clamping groove, and a snap spring with a ring gap is arranged in the clamp spring ring 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; 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 annular groove, the other end of the ring-opening clamp spring is fixedly provided with a clamping piece, the clamping piece is arranged in the clamping groove, and the ring-opening clamp spring is arranged in the annular groove of the clamp spring; the poking spring through hole and the poking spring column bar 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. 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.

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 draw-in groove and jump ring annular on the spiral hole inner wall, be equipped with the fastener in the draw-in groove, be equipped with in the jump ring annular and have the ring and lack the jump ring.

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 ring-lacking clamp spring is a ring-lacking ring which is made of elastic materials and is formed by a ring with a gap, one end of the ring-lacking ring is provided with a positioning pin vertical to the plane of the ring-lacking ring, the other end of the ring-lacking clamp spring is fixed with a clamping piece vertical to the plane of the ring-lacking ring in the same direction, and the outer diameter of the clamping piece is larger than the wire diameter of the ring-lacking ring.

The 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, and the jump ring annular is dug promptly and is established on the spiral hole inner ring wall of nut, comprises annular diapire, lower annular lateral wall and last annular lateral wall, and 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.

The positioning holes are drilled in the positions, close to the rear side wall of the inclined clamping groove, of the side wall of the lower ring groove, the positioning pins at one end of the ring-lacking clamp spring are inserted into the positioning holes, and the clamping piece at the other end of the ring-lacking clamp 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; thus facilitating handheld operation; 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 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 most advanced insertion of slope form end 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 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 fastening method of the locknut is that when the locknut leaves a factory, each locknut is provided with the poking spring column strip, the locknut can be screwed down according to a common method, after the locknut is screwed down, the poking spring column strip is taken down, the ring is lack of the snap spring and can elastically expand the ring, the clamping piece is tensioned, the clamping piece is clamped between the external thread and the bottom wall of the groove, and the locknut 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 utility model only needs to improve the nut, and the clamping groove, the clamp spring ring groove, the clamping piece and the ring-lacking clamp spring are arranged in the nut, so that the structure is simple and the operation is convenient; the clamping piece is connected by the middle ring-lack clamp spring and the clamp spring ring groove structure, 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, 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 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 structural diagram of one of various structures of the middle clip member of the present invention, i.e. the cylindrical clip member.

Fig. 5 is a schematic structural diagram of a circlip in the embodiment.

Fig. 6 is a cross-sectional structure diagram and a combined exploded structure diagram of the locknut adopting the snap ring with the ring gap and the snap ring groove at the snap ring groove part in the embodiment.

Fig. 7 is a schematic structural diagram of a striking spring column in the embodiment.

Fig. 8 is a schematic structural diagram of a circlip with an inward-bent part and a straight rod part.

Fig. 9 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 circular arc curved surface trough bottom wall, 12. the curved surface trough bottom wall of the ellipse circular arc, 13. the straight plane trough bottom wall, 14. the cylindrical fastener, 15. the double-screw bolt, 20. the ring lacks the jump ring, 21. the ring lacks the ring, 22. the locating foot, 23. the jump ring annular, 24. the annular bottom wall, 25. the lower annular sidewall, 26. the upper annular 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. the straight rod portion.

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; in the utility model, a clamping groove 4 and a clamp spring ring groove 23 are dug on the inner wall of the spiral hole 2, a clamping piece 5 is arranged in the clamping groove 4, and a snap spring ring 20 with a ring gap is arranged in the clamp spring ring groove 23; and a poking spring column 29 is arranged on the outer end surface of the nut 1.

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. 6, dig along the last lateral wall 8 of draw-in groove 4 on the 2 inner wall surfaces of spiral hole and be equipped with jump ring annular groove 23, jump ring annular groove 23 digs and establishes on the 2 inner ring walls of spiral hole of nut 1, comprises annular groove diapire 24, lower annular groove lateral wall 25 and last annular groove lateral wall 26, and wherein lower annular groove lateral wall 25 merges the last lateral wall 8 of slope form draw-in groove 6 for go up lateral wall 8 and the lower annular groove lateral wall 25 vacancy in last lateral wall 8 position.

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.

The ring-lacking clamp spring 20 is a ring-lacking 21 which is made of elastic materials and is formed by a ring with a gap, one end of the ring-lacking 21 is provided with a positioning pin 22 which is perpendicular to the plane where the ring-lacking 21 is located, the other end of the ring-lacking clamp spring is fixed with a clamping piece 5 which is perpendicular to the plane where the ring-lacking 21 is located towards the same direction, the outer diameter of the clamping piece 5 is larger than the wire diameter of the material for manufacturing the ring-lacking 21, and therefore the ring-lacking clamp spring 21 is convenient to clamp the nut 1 and the stud 15 without influencing the clamping piece 5.

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, and as shown in fig. 1, 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. 7, the end of the toggle spring bar 29 is an inclined tip end, so that the insertion and the opposite side abutment 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. 8, 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 tip of the inclined 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 is clamped between the external 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. 9, at first, will dial spring column 29 and insert to make and dial spring column 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 column 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 (8)

1. A locknut comprises a spiral hole and is characterized in that a clamping groove and a clamp spring ring groove are formed in the inner wall of the spiral hole, a clamping piece is arranged in the clamping groove, and a snap spring with a ring gap is arranged in the clamp spring ring 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;

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 an annular groove bottom wall, a lower annular groove side wall and an upper annular groove side wall;

the ring-opening clamp spring is a circular-opening ring which is made of elastic materials and is formed by a ring with a opening, one end of the circular-opening ring is provided with a positioning pin vertical to the plane of the circular-opening ring, the other end of the circular-opening ring is fixed with a clamping piece, and the outer diameter of the clamping piece is larger than the wire diameter of the circular-opening ring;

positioning holes are drilled in the positions, close to the rear side walls of the inclined clamping grooves, of the side walls of the lower annular grooves;

the positioning pin at one end of the ring-cut clamp spring is inserted into the positioning hole, and the clamping piece at the other end is placed in the inclined clamping groove.

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, wherein a toggle spring through hole penetrating the upper 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.

5. The locknut of claim 4 wherein the end of the striking spring bar is a beveled tip end.

6. The locknut of claim 5, wherein the toggle spring through hole is any one of a circular hole, a square hole, a diamond hole or a flat hole, and the toggle spring bar is a corresponding one of a circular bar, a square bar, a diamond bar or a flat bar.

7. The locknut of claim 6, 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.

8. The locknut of claim 7, wherein the circlip in ring segment is arranged as a straight rod part at the section of the connecting clip.

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