CN214533958U - 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, a bottom hole is formed in the bottom wall of the ring groove of the clamp spring ring groove, a ring-lacking clamp spring is arranged in the clamp spring ring groove, and a snap fastener is arranged on the ring-lacking clamp spring; 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 ring groove, the other end of the ring-opening clamp spring is fixed with a clamping piece and is placed in the clamping groove, the ring-opening clamp spring is placed in the ring groove of the clamp spring, and the snap fastener is placed in the bottom hole; 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.

Therefore, the applicant filed a utility model patent with application number 2021201281224 on the last few days, wherein a clamping groove and a clamp spring ring groove are arranged on the inner wall of a spiral hole of the nut, 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; 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.

However, the proposal still has the defects that the nut can be disassembled only by the spring poking column bar, which is not smooth in actual operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem to the aforesaid is not enough, provides an adopt mechanism that snap-fastener and bottom hole combined together to can dismantle the nut under the condition that need not to dial the spring post strip, so that it is more convenient at the actual work.

For solving the technical problem, the utility model discloses the technical scheme who adopts is a lock nut, 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 a bottom outlet that accesss to nut outer wall surface on the annular diapire of jump ring annular, it lacks the jump ring to be equipped with the ring in the jump ring annular, it lacks the jump ring to encircle is equipped with an outside convex snap-fastener on 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-segment snap spring is a ring-segment ring which is made of elastic materials and is formed by a ring with a gap, one end of the ring-segment ring is provided with a positioning pin vertical to the plane of the ring-segment ring, the other end of the ring-segment ring is fixed with a clamping piece vertical to the plane of the ring-segment ring in the same direction, and the outer diameter of the clamping piece is larger than the wire diameter of the ring-segment ring; the segment ring is provided with a snap fastener which protrudes outwards.

The snap fastener is arranged in the middle of the half segment ring close to one side of the clamping piece.

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.

A positioning hole is drilled on the position, close to the rear side wall of the inclined clamping groove, of the side wall of the lower ring groove, and a bottom hole leading to the surface of the outer wall of the nut is formed in the bottom wall of the ring groove; snap fasteners on the ring-lacking clamp springs are arranged in the bottom holes, positioning pins at one ends are inserted into the positioning holes, and clamping pieces at the other ends are placed in the inclined clamping grooves.

The bottom hole sets up in the middle part that is close the annular diapire of draw-in groove one side, and the position phase-match on the ring lacks the jump ring with the snap-fastener, makes the snap-fastener can settle in the bottom hole to make the top of snap-fastener emerge outside nut lateral wall surface or with nut lateral wall surface parallel and level.

Furthermore, the ring-cut clamp spring is arranged into a straight rod part at the section of the connecting clamp piece.

Furthermore, the ring groove bottom wall and the clamping groove are provided with bottom wall protrusions at positions which are symmetrical to the circle center of the spiral hole, so that the ring-lacking clamp spring is supported and supported, and the ring-lacking clamp spring and the clamp spring ring groove are located on the same circle center in a conventional state.

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 due to maintenance, the snap fastener can be pressed by a hand or a wrench or other tools, the ring-lacking clamp spring can be tightly supported to the direction of the clamping groove on the side edge, so that the clamping piece fixed on the ring-lacking clamp spring 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 nut can be effectively clamped by the clamping piece, cannot be reversely unscrewed under any vibration, and can be suitable for nuts of any specification; the nut can be smoothly fastened and disassembled by combining the snap fastener and the bottom hole.

Drawings

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

Fig. 2 is the cross-sectional structure diagram of the locknut at the position of the circlip ring groove.

Fig. 3 is a perspective structural diagram of the card slot in fig. 1.

Fig. 4 is a schematic structural diagram of a circlip in the embodiment.

Fig. 5 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 jump ring annular groove, 6. the fastener, 7. the ring lacks the jump ring, 8. the groove bottom wall, 9. the upper sidewall, 10. the lower sidewall, 11. the back sidewall, 12. the annular groove bottom wall, 13. the lower annular groove sidewall, 14. the upper annular groove sidewall, 15. the locating hole, 16. the bottom hole, 17. the locating foot, 18. the snap fastener, 19. the straight rod part, 20. the bottom wall is protruding.

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 the figure, the locknut is manufactured, the existing nuts 1 are all provided with a spiral hole 2 at the position of an axial lead, and the inner ring wall of the spiral hole 2 is provided with an internal thread 3 for screwing in the external thread on the stud to fasten and connect a fastened piece; the utility model discloses dig on the inner wall of spiral hole 2 and be equipped with draw-in groove 4 and jump ring annular 5, be equipped with fastener 6 in the draw-in groove 4, be equipped with a bottom hole 16 that accesss to nut outer wall surface on the annular diapire 12 of jump ring annular 5, it lacks jump ring 7 to be equipped with the ring in jump ring annular 5, it is equipped with an outside convex snap-fastener 18 on the jump ring 7 to encircle to lack.

The clamping groove 4 is an inclined clamping groove which is formed by digging an inclined side groove towards the inner wall of the spiral hole 2 in the unscrewing direction by taking the surface of the inner wall of the spiral hole 2 as a starting point; the inclined side groove is composed of a groove bottom wall 8, an upper side wall 9, a lower side wall 10 and a rear side wall 11, the inclined side groove is not provided with a front side wall, the front side wall of the inclined side groove is combined with the groove bottom wall 8 into a whole, namely, the groove bottom wall 8 extends upwards from the bottom of the rear side wall 11 in an inclined mode until the inclined side groove is intersected with the notch surface of the clamping groove 4, and the inclined clamping groove is formed.

The groove bottom wall 8 is an arc-shaped arc-curved groove bottom wall, an elliptic arc-shaped groove bottom wall, a straight plane groove bottom wall, or a straight plane groove bottom wall tangent to an inner annular wall of a circular spiral hole.

The clamping piece 6 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 sphere-shaped clamping piece or a spherical clamping piece; preferably, cylindrical or spherical clips are used.

For the length specification of the outer diameter of the card member 6, the distance from the groove bottom wall 8 to the groove opening at the position where the distance from the rear side wall is equal to the radius of the card member 6 is larger than the outer diameter of the card member; preferably, the outside diameter of the card member 6 is equal to two thirds of the distance from the bottom wall of the groove to the notch at a position equal to the radius of the card member from the rear side wall; thus, the clamping piece 6 can freely move in the clamping groove 4 and can be hidden in the deep part of the clamping groove or exposed in the shallow part of the clamping groove.

The ring-segment snap spring 7 is a ring-segment ring formed by a ring with a gap made of elastic materials, one end of the ring-segment ring is provided with a positioning pin 17 vertical to the plane of the ring-segment ring, the other end of the ring-segment ring is fixed with a clamping piece 6 vertical to the plane of the ring-segment ring in the same direction, and the outer diameter of the clamping piece 6 is larger than the wire diameter of the ring-segment ring; the segment ring is provided with a snap fastener 18 which protrudes outwards; the ring-cut snap spring 7 is arranged as a straight rod part 19 at the section of the connecting clamping piece 4.

The snap fastener 18 is arranged in the middle of the half-round ring close to one side of the clamping piece 6, so that the clamping piece can be directly pushed to the inside of the clamping groove after the snap fastener is pressed from the outside, and the clamping piece is separated from the contact with the stud.

2 inner wall surfaces of spiral hole are gone up and are dug along last lateral wall 9 of draw-in groove 4 and be equipped with jump ring annular 5, and jump ring annular 5 is dug promptly and is established on 2 inner ring walls of spiral hole of nut 1, comprises annular diapire 12, lower annular lateral wall 13 and last annular lateral wall 14, and wherein lower annular lateral wall 13 merges the last lateral wall 9 of slope form draw-in groove 4 for go up lateral wall 9 and last lateral wall 13 vacancy of 9 positions of lateral wall.

A positioning hole 15 is drilled on the position of the side wall 13 of the lower ring groove, which is close to the rear side wall 11 of the inclined clamping groove 4, and a bottom hole 16 leading to the surface of the outer wall of the nut 1 is formed in the bottom wall 12 of the ring groove; snap fasteners on the ring-cut snap springs 7 are arranged in bottom holes 16, positioning pins 17 at one ends of the ring-cut snap springs 7 are inserted into the positioning holes 15, and the clamping pieces 6 at the other ends are placed in the inclined clamping grooves 4.

The bottom hole 16 is arranged in the middle of the annular groove bottom wall 12 close to one side of the clamping groove 4, and the position of the bottom hole is matched with that of the snap fastener 18 on the annular groove clamp spring 7, so that the snap fastener 18 can be arranged in the bottom hole 16, and the top of the snap fastener 18 protrudes out of the outer side wall surface of the nut 1 or is flush with the outer side wall surface of the nut 1.

Furthermore, the ring groove bottom wall 12 and the clamping groove 4 are provided with bottom wall protrusions 20 at positions which are symmetrical about the center of the spiral hole, so that the ring-segment snap spring 7 is supported, and the ring-segment snap spring 7 and the snap spring ring groove 5 are located on the same center of the circle in a conventional state.

During the use, as shown in fig. 5, can clip nut 1 with the spanner to clip the snap-fastener 18 of shallow exposure on the outer wall surface of spiral shell 1, make the ring lack jump ring 7 and push fastener 6 to the inside depths of draw-in groove 4, then screw up nut 1 according to ordinary method, screw up the back, loosen the spanner, the ring lacks jump ring 7 and can expand the ring by elasticity, take up fastener 6, make fastener 6 block between the external screw thread of double-screw bolt and the groove diapire 8 on the nut, make nut 1 external force vibrations down unable the pine of unscrewing.

During the dismantlement, directly clip nut 1 with the spanner to clip the snap-fastener 18 of shallow exposure on the outer wall surface of spiral shell 1, make fastener 6 pushed the draw-in groove 4 depths, break away from the contact with the double-screw bolt external screw thread, nut 1 can reverse the unscrewing smoothly.

Claims (6)

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, a bottom hole leading to the surface of the outer wall of the nut is formed in the bottom wall of the ring groove of the clamp spring ring groove, a ring-lacking clamp spring is arranged in the clamp spring ring groove, and a snap fastener protruding outwards is arranged on the ring-lacking clamp spring;

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 consists of a groove bottom wall, an upper side wall, a lower side wall and a rear side wall, namely the groove bottom wall extends upwards from the bottom of the rear side wall in an inclined way 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;

a positioning hole is drilled on the position, close to the rear side wall of the inclined clamping groove, of the side wall of the lower ring groove, and a bottom hole leading to the surface of the outer wall of the nut is formed in the bottom wall of the ring groove;

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

snap fasteners on the ring-lacking clamp springs are arranged in the bottom holes, positioning pins at one ends are inserted into the positioning holes, and clamping pieces at the other ends are placed in the inclined clamping grooves.

2. The locknut of claim 1 wherein the snap fastener is disposed in the middle of the half-segment ring on the side near the clip member; the bottom hole is arranged in the middle of the bottom wall of the annular groove close to one side of the clamping groove.

3. The locknut of claim 2, wherein the circlip in ring segment is arranged as a straight rod part at the section of the connecting clip.

4. The locknut of claim 3, wherein the bottom wall of the ring groove is provided with a bottom wall protrusion at a position symmetrical to the circle center of the spiral hole of the clamping groove.

5. The locknut of claim 4, 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.

6. The locknut of claim 5, 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.

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