CN212003884U

CN212003884U - Reverse anti-loosening combined bolt and nut

Info

Publication number: CN212003884U
Application number: CN202020494129.3U
Authority: CN
Inventors: 董服明; 董建光
Original assignee: Zhejiang Geliwei Machinery Co ltd
Current assignee: Zhejiang Geliwei Machinery Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-11-24
Anticipated expiration: 2030-04-07

Abstract

The utility model belongs to the technical field of machine parts, specifically be a reverse locking combination formula bolt and nut that moves, the screw cap comprises a nut, the welding of the surperficial center department of nut bottom has the screw rod, spring pad and gasket have been cup jointed to the upper end of screw rod surface, the gasket is located the below of spring pad, the lower extreme screw thread of screw rod surface rotates and is connected with first nut and second nut, the second nut is located the below of gasket, first nut is located the below of second nut, circular recess has been seted up to the upper surface of nut, the through hole has been seted up at the bottom center of circular recess, the inner chamber activity of through hole is provided with interior hexagonal screw rod, the bottom activity of interior hexagonal screw rod is provided with draws the cap, this novel scheme can effectually prevent that the nut is not hard up.

Description

Reverse anti-loosening combined bolt and nut

Technical Field

The utility model relates to a machine parts technical field specifically is a reverse locking combination formula bolt and nut that moves.

Background

The bolt and nut are connection and fastening parts connected through threads, are widely used in the mechanical field and are mainly used for connecting and fastening mechanical parts;

bolt and nut connected mode mainly prevents bolt and nut's not hard up through the frictional force between the screw surface when the external screw thread of bolt and the internal thread cooperation of nut, and in the practical application, when the frictional force that produces in order to prevent the screw-thread cooperation is not enough to prevent not hard up, generally adopt to set up the gasket in the junction of bolt or nut and fastening component, pressure when increasing bolt and nut cooperation to increase the frictional force between the external screw thread of bolt and the internal thread of nut, and then reduce the not hard up risk of bolt and nut.

However, when the bolt and the nut are in a vibration environment, especially in an environment with large amplitude, such as a vibration environment of an automobile, a train and the like, vibration can cause a sliding force of inclined planes generated on the screw threads of the bolt and the nut, and when the sliding force is larger than a friction force between the screw threads, sliding is generated between the external screw threads of the bolt and the internal screw threads of the nut, so that relative rotation is generated between the bolt and the nut, a connecting structure is loosened, and a great potential safety hazard exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reverse locking combination formula bolt and nut that moves to solve and put forward among the above-mentioned background art when bolt and nut is in the vibration environment, when especially the great environment of amplitude, for example during vibration environment such as car, train, the vibration can lead to the sliding force on the production inclined plane of the screw thread of bolt and nut, when this sliding force is greater than the frictional force between the screw thread, will make and produce between the external screw thread of bolt and the internal thread of nut and slide, thereby it is not hard up to lead to taking place relative rotation between bolt and the nut and make connection structure, there is very big potential safety hazard.

In order to achieve the above object, the utility model provides a following technical scheme: the nut is characterized by comprising a nut, the welding of the center of the surface of the bottom of the nut is provided with a screw rod, a spring pad and a gasket are sleeved at the upper end of the outer surface of the screw rod, the gasket is located below the spring pad, the lower end threads of the outer surface of the screw rod are rotatably connected with a first nut and a second nut, the second nut is located below the gasket, the first nut is located below the second nut, a circular groove is formed in the upper surface of the nut, a through hole is formed in the center of the bottom of the circular groove, an inner cavity of the through hole is movably provided with an inner hexagonal screw, and a pull cap is movably arranged at the bottom end of the inner.

Preferably, the lower surface of the gasket is provided with an inclined sheet, the upper surface of the second nut is provided with a counter-rotation bump, and the inclined sheet is matched with the counter-rotation bump.

Preferably, through holes are formed in the middle of the front surfaces of the first nut and the second nut, inner hexagonal bolts are movably arranged in inner cavities of the through holes, inner threads are formed in the walls of the inner cavities of the through holes, and the inner hexagonal bolts are matched with the inner threads.

Preferably, the lower surface of the second nut is provided with a trapezoidal groove, the outer edge of the upper surface of the first nut is uniformly and fixedly connected with three locking blocks, and the trapezoidal groove is matched with the locking blocks.

Preferably, the bottom of the screw is provided with a split, and the split extends upwards to the middle of the screw.

Preferably, the surface of the screw is wound with a sealing tape, and the sealing tape is made of polytetrafluoroethylene.

Preferably, the left side and the right side of the inner cavity of the through hole are both provided with grooves, the left side and the right side of the surface of the pull cap are both provided with convex blocks, and the convex blocks are in sliding connection with the grooves.

Compared with the prior art, the beneficial effects of the utility model are that:

1. according to the reverse anti-loosening combined bolt and nut, the screw rod is welded at the center of the surface of the bottom of the nut, the spring pad and the gasket are sleeved at the upper end of the outer surface of the screw rod, and the first nut at the lower end of the outer surface of the screw rod tightly presses the second nut to fix an object;

2. according to the reverse anti-loosening combined bolt and nut, the inner hexagonal screw is movably arranged in the inner cavity of the through hole, the pull cap is movably arranged at the bottom end of the inner hexagonal screw, the inner hexagonal bolt rotates to pull the pull cap to expand the bottom of the screw, and the nut cannot loosen.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the screw structure of the present invention;

FIG. 3 is a schematic view of the inner hexagonal screw connection structure of the present invention;

FIG. 4 is a schematic view of the spring pad of the present invention;

fig. 5 is a schematic view of the nut structure of the present invention.

In the figure: 1. a nut; 2. a first nut; 3. a screw; 4. a spring pad; 5. a gasket; 6. a second nut; 7. a through hole; 8. a hexagon socket head cap screw; 9. a locking block; 10. an inclined plate; 11. a trapezoidal groove; 12. counter-rotating the bumps; 13. pulling the cap; 14. a circular groove; 15. a through hole; 16. an inner hexagonal screw; 17. and (4) cracking.

Detailed Description

The technical solution in the embodiment of the present invention will be made clear below with reference to the drawings in the embodiment of the present invention; the present invention has been described in considerable detail with reference to certain preferred versions thereof. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: including nut 1, the welding of the surperficial center department of 1 bottom of nut has screw rod 3, the upper end of 3 surfaces of screw rod has cup jointed spring pad 4 and gasket 5, gasket 5 is located the below of spring pad 4, the lower extreme screw thread of 3 surfaces of screw rod rotates and is connected with first nut 2 and second nut 6, second nut 6 is located the below of gasket 5, first nut 2 is located the below of second nut 6, circular recess 14 has been seted up to the upper surface of nut 1, through hole 15 has been seted up at the bottom center of circular recess 14, the inner chamber activity of through hole 15 is provided with interior hexagonal screw rod 16, the bottom activity of interior hexagonal screw rod 16 is provided with draws cap 13.

Through adopting above-mentioned technical scheme, the welding of the surperficial center department of nut 1 bottom has screw rod 3, spring pad 4 and the gasket 5 that cup joints on the screw rod 3, first nut 2 of 3 lower extreme spiro unions of screw rod and second nut 6 need its fixed object to fix during, circular recess 14 has been seted up to the upper surface of nut 1, through hole 15 has been seted up at the bottom center of circular recess 14, the inner chamber activity of through hole 15 is provided with interior hexagonal screw rod 16, the bottom activity of interior hexagonal screw rod 16 is provided with draws cap 13, rotate interior hexagonal screw rod 16 pulling and draw cap 13, make the nut can not reverse rotation.

Referring to fig. 5, the present invention provides a technical solution: the lower surface of the gasket 5 is provided with an inclined sheet 10, the upper surface of the second nut 6 is provided with a counter-rotation bump 12, and the inclined sheet 10 is matched with the counter-rotation bump 12.

By adopting the technical scheme, the first nut 2 is rotated to be tightly pressed without looseness under the matching action of the inclined sheet 10 and the anti-rotation convex block 12.

Referring to fig. 1, the present invention provides a technical solution: through-hole 7 has all been seted up to department in the middle of the front surface of first nut 2 and second nut 6, and the inner chamber of two through-holes 7 all moves about and is provided with hexagon socket head cap screw 8, and the inner chamber wall of through-hole 7 has seted up the internal thread, and hexagon socket head cap screw 8 and internal thread phase-match.

Through adopting above-mentioned technical scheme, make its

first nut

2 and 6 fixed positions of second nut after screwing up through hexagon socket head cap screw 8, can not reverse not hard up.

Referring to fig. 1, the present invention provides a technical solution: trapezoidal recess 11 has been seted up to the lower surface of second nut 6, the even fixedly connected with three latch segment 9 of outward flange of first nut 2 upper surface, and trapezoidal recess 11 and latch segment 9 phase-match.

By adopting the technical scheme, the trapezoidal groove 11 formed in the upper surface of the second nut 6 compresses the locking block 9 fixedly connected with the outer edge of the second nut 6, so that the locking block 9 clamps the screw rod 3.

Referring to fig. 4, the present invention provides a technical solution: the bottom of the screw rod 3 is provided with a slit 17, and the slit 17 extends upwards to the middle of the screw rod 3.

By adopting the technical scheme, the inner hexagonal screw 16 rotates to pull the pulling cap 13 to crack the bottom of the screw 3, so that the first nut 2 and the second nut 6 cannot be loosened.

Referring to fig. 4, the present invention provides a technical solution: the surface of the screw rod 3 is wound with a sealing adhesive tape, and the sealing adhesive tape is made of polytetrafluoroethylene.

Through adopting above-mentioned technical scheme, the winding sealing strip in surface of screw rod 3 plays the not hard up effect of sealed side.

Referring to fig. 1, the present invention provides a technical solution: the left and right sides in through hole 15 inner chamber all sets up flutedly, draws the left and right sides on cap 13 surface all to be provided with the lug, and lug and recess sliding connection.

By adopting the technical scheme, the convex block slides in the groove, so that the pull cap 13 moves up and down in the through hole 15.

The working principle is as follows: when the novel scheme is used and a machine is installed, the screw rod 3 penetrates through the installation hole, the spring pad 4 and the gasket 5 are sequentially sleeved on the screw rod 3, the second nut 6 is rotated onto the screw rod 3 after being sleeved on the screw rod 3 and is rotationally screwed, the first nut 2 is rotated onto the screw rod 3, when the screw rod is rotated, the outer peripheral edge of the lower surface of the second nut 6 is fixedly connected with the three locking blocks 9, the trapezoidal groove 11 on the upper surface of the first nut 2 tightly presses the second nut 6, so that the three locking blocks 9 are locked, the screw rod 3 is clamped, the sealing adhesive tape wound on the surface of the screw rod 3 can prevent the nut from loosening, the circular groove 14 is formed on the upper surface of the nut 1 after the installation is completed, the through hole 15 is formed in the center of the bottom of the circular groove 14, the inner cavity of the through hole 15 is movably provided with the inner hexagonal screw rod 16, the left side and the right side of the inner cavity of the, and the lug is connected with the groove in a sliding manner, the inner hexagonal screw 16 cannot rotate in the same direction as the pull cap 13 when rotating, the pull cap 13 at the bottom end of the inner hexagonal screw 16 is pulled by rotating the inner hexagonal screw 16, so that the bottom of the screw 3 is expanded, the nut cannot rotate reversely, and the tightness of the bolt and the nut cannot fall off in a vibration environment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a reverse locking combination formula bolt and nut that moves, includes nut (1), its characterized in that: the welding of the surperficial center department of nut (1) bottom has screw rod (3), spring pad (4) and gasket (5) have been cup jointed to the upper end of screw rod (3) surface, gasket (5) are located the below of spring pad (4), the lower extreme screw thread of screw rod (3) surface rotates and is connected with first nut (2) and second nut (6), second nut (6) are located the below of gasket (5), first nut (2) are located the below of second nut (6), circular recess (14) have been seted up to the upper surface of nut (1), through hole (15) have been seted up at the bottom center of circular recess (14), the inner chamber activity of through hole (15) is provided with interior hexagonal screw rod (16), the bottom activity of interior screw rod (16) is provided with and draws cap (13).

2. The reverse anti-loosening combined bolt and nut as claimed in claim 1, wherein: the lower surface of gasket (5) is provided with slope piece (10), anti-rotation lug (12) have been seted up to the upper surface of second nut (6), just slope piece (10) and anti-rotation lug (12) phase-match.

3. The reverse anti-loosening combined bolt and nut as claimed in claim 1, wherein: through-hole (7), two have all been seted up in the middle of first nut (2) with the front surface of second nut (6) department the inner chamber of through-hole (7) all activity is provided with hexagon socket head cap screw (8), just the inner chamber wall of through-hole (7) is seted up there is the internal thread, just hexagon socket head cap screw (8) and internal thread phase-match.

4. The reverse anti-loosening combined bolt and nut as claimed in claim 1, wherein: trapezoidal recess (11) have been seted up to the lower surface of second nut (6), the even fixedly connected with three latch segment (9) of outward flange of first nut (2) upper surface, just trapezoidal recess (11) and latch segment (9) phase-match.

5. The reverse anti-loosening combined bolt and nut as claimed in claim 1, wherein: a split (17) is formed in the bottom of the screw rod (3), and the split (17) extends upwards to the middle of the screw rod (3).

6. The reverse anti-loosening combined bolt and nut as claimed in claim 1, wherein: and a sealing adhesive tape is wound on the surface of the screw rod (3), and the sealing adhesive tape is made of polytetrafluoroethylene.

7. The reverse anti-loosening combined bolt and nut as claimed in claim 1, wherein: the left side and the right side of the inner cavity of the through hole (15) are both provided with grooves, the left side and the right side of the surface of the pull cap (13) are both provided with convex blocks, and the convex blocks are in sliding connection with the grooves.