CN211874909U

CN211874909U - Anti-theft nut

Info

Publication number: CN211874909U
Application number: CN202020152705.6U
Authority: CN
Inventors: 孙云虎
Original assignee: 孙云虎
Current assignee: Quzhou Hongtong Fastener Co.,Ltd.
Priority date: 2020-02-05
Filing date: 2020-02-05
Publication date: 2020-11-06
Anticipated expiration: 2030-02-05

Abstract

The utility model discloses an antitheft nut, including nut body, stopping mechanism, spanner rand and guard ring, the internal thread has been seted up on the inside wall of nut body, both sides all are provided with stopping mechanism around the nut body is inside, and are anticlockwise distribution between the stopping mechanism, the top of nut body is provided with the boss, and the outside cover of boss is equipped with the spanner rand, the bottom cover of nut body is equipped with guard ring. This theftproof nut through setting up elastic stopping mechanism for hinder the nut body gyration, and reduce outside moment of torsion, make the surface skid, thereby improved the theftproof performance of nut, and constitute reverse meshing through inside and outside dual sawtooth structure, be convenient for manually tighten, again because the guard ring is isometric with the nut body, can be used to assistance-localization real-time, thereby improved the assembly efficiency of theftproof nut.

Description

Anti-theft nut

Technical Field

The utility model relates to a nut technical field specifically is a theftproof nut.

Background

The nut is the most common connecting and fastening device, but in some special use occasions (such as power transmission towers of power systems, communication systems, field facilities such as highways and the like), in order to avoid being damaged by lawless persons, an anti-theft structure needs to be additionally arranged on the conventional nut.

However, the existing anti-theft nut still has certain problems, and the specific problems are as follows:

1. the general anti-theft nut has the following anti-theft methods: the nut can only be screwed by a special tool, an anti-theft pin is arranged in the nut, but the method can be destructively disassembled by a pipe wrench clamping tool, so that the anti-theft performance is poor;

2. the partial anti-theft nut has the problem that the self installation is inconvenient due to the fact that the partial anti-theft nut is heavier than the anti-theft nut, and the assembly efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a to prior art not enough, the utility model provides a theftproof nut possesses advantages such as the theftproof performance is strong, the installation is convenient to solve the problem that proposes in the above-mentioned background art.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an anti-theft nut, includes nut body, stopping mechanism, spanner rand and guard ring, the internal thread has been seted up on the inside wall of nut body, both sides all are provided with stopping mechanism around the nut body is inside, and are anticlockwise distribution between the stopping mechanism, the top of nut body is provided with the boss, and the outside cover of boss is equipped with the spanner rand, the bottom cover of nut body is equipped with guard ring.

Preferably, all be provided with the tangent plane on the two lateral walls of the left and right sides of nut body, all be provided with the convex surface on the two inside walls of the left and right sides of guard ring simultaneously, and agree with each other between convex surface, the tangent plane and constitute limit structure.

Preferably, the stopping mechanism is internally provided with a groove, a stop block, a spring and a steel ball, the stop block is fixed on one side inside the groove, the spring is welded on one side of the stop block, the steel ball is fixed at one end of the spring, and the steel ball slides and stretches along an arc-shaped track in the groove.

Preferably, the groove is of an arc structure, and the maximum depth of the groove is greater than that of the internal thread.

Preferably, the outer edge of the boss and the inner edge of the wrench collar are in a saw-tooth structure with equal intervals and are meshed reversely.

Preferably, the outer edge of the wrench clamping ring is in a regular hexagon structure, and the longitudinal length of the wrench clamping ring is larger than that of the boss.

Preferably, the outer diameter of the guard ring is larger than the maximum outer diameter of the boss, and the longitudinal length of the guard ring is equal to the longitudinal length of the nut body.

(III) advantageous effects

Compared with the prior art, the utility model provides a theftproof nut possesses following beneficial effect:

1. according to the anti-theft nut, the anti-return mechanism is arranged in the nut body anticlockwise, the steel balls are elastically connected with the stop blocks through the springs, so that the steel balls slide and stretch along an arc-shaped track in the grooves and are used for blocking the nut body to rotate, the protective ring with a smooth surface is arranged, the outer edge of the boss is of a sawtooth structure and is used for reducing torque, and the anti-theft performance of the nut is improved;

2. this antitheft nut, through the outside suit spanner rand at the boss, and the outward flange of boss and the reverse meshing of the inward flange of spanner rand to the longitudinal length of spanner rand is greater than the longitudinal length of boss, is convenient for screw up, because the external diameter of protection circle is greater than the biggest external diameter of boss, and the longitudinal length of protection circle equals the longitudinal length of nut body for assistance-localization real-time, thereby has improved antitheft nut's assembly efficiency.

Drawings

FIG. 1 is a schematic view of the cross-sectional structure of the present invention;

FIG. 2 is a schematic top view of the cross-sectional structure of the present invention;

fig. 3 is a schematic view of the bottom view of the present invention.

In the figure: 1. a nut body; 2. an internal thread; 3. a backstop mechanism; 301. a groove; 302. a stopper; 303. a spring; 304. steel balls; 4. a boss; 5. a wrench retainer ring; 6. a guard ring; 7. a convex surface; 8. cutting into a section.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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. 1-3, the present invention provides a technical solution: the utility model provides an anti-theft nut, includes nut body 1, stopping mechanism 3, spanner rand 5 and guard ring 6, sets up on nut body 1's the inside wall internal thread 2, and both sides all are provided with stopping mechanism 3 around nut body 1 is inside, and are anticlockwise distribution between the stopping mechanism 3, and nut body 1's top is provided with boss 4, and the outside cover of boss 4 is equipped with spanner rand 5, and nut body 1's bottom cover is equipped with guard ring 6.

All be provided with tangent plane 8 on the two lateral walls of the left and right sides of nut body 1 as in fig. 3, all be provided with convex surface 7 on the two inside walls of the left and right sides of guard ring 6 simultaneously, and agree with each other between convex surface 7, the tangent plane 8 and constitute limit structure for two-way location both increases the contact surface of nut body 1 and work piece, avoids guard ring 6 to rock at will again.

As shown in fig. 2, a groove 301, a stopper 302, a spring 303 and a steel ball 304 are arranged inside the stopping and returning mechanism 3, the stopper 302 is fixed on one side inside the groove 301, the spring 303 is welded on one side of the stopper 302, the steel ball 304 is fixed on one end of the spring 303, and the steel ball 304 slides and stretches along an arc-shaped track in the groove 301 to prevent the nut body 1 from rotating.

As shown in fig. 2, the groove 301 is a circular arc structure, and the maximum depth of the groove 301 is greater than the maximum depth of the internal thread 2, so as to reserve a certain amount of expansion.

As shown in figure 2, the outer edge of the boss 4 and the inner edge of the wrench clamping ring 5 are in sawtooth structures with equal intervals and are meshed in opposite directions, and manual screwing is facilitated through the matching of the two structures.

As shown in figures 1 and 2, the outer edge of the wrench clamping ring 5 is in a regular hexagon structure, and the longitudinal length of the wrench clamping ring 5 is larger than that of the boss 4, so that the contact area is increased, and manual screwing is facilitated.

As shown in figure 1, the outer diameter of the guard ring 6 is larger than the maximum outer diameter of the boss 4 for reducing the torque, and the longitudinal length of the guard ring 6 is equal to that of the nut body 1 for assisting the positioning.

The working principle is as follows: when the nut is used, according to the attached

drawings

1, 2 and 3, firstly, the protection ring 6 is sleeved on the nut body 1 through the limiting structure formed between the convex surface 7 and the tangent plane 8 and then is connected with a matched bolt, then, the wrench clamping ring 5 is sleeved on the outer side of the boss 4, as the outer edge of the wrench clamping ring 5 is in a regular hexagon structure and the longitudinal length of the wrench clamping ring 5 is greater than that of the boss 4, a worker can conveniently directly screw the protection ring by using a wrench, and as the longitudinal length of the protection ring 6 is equal to that of the nut body 1, when the nut body 1 is screwed, two ends of the protection ring 6 are simultaneously in close contact with the boss 4 and the surface of a workpiece for auxiliary positioning;

in the process, when in a screwing state, along with the deep meshing of the internal thread 2 and the bolt, the two steel balls 304 slide and stretch along the arc-shaped track in the groove 301 through the spring 303 until being compressed to the maximum depth, when the nut body 1 rotates, the steel balls 304 can generate large reverse resultant force with the nut body 1 and the bolt to block the rotation, and meanwhile, after the installation is completed, the wrench clamping ring 5 is taken down, the outer edge of the boss 4 is of a saw-toothed structure, the surface of the protection ring 6 is relatively smooth, so that the additional torque is far smaller than the internal resistance, and the anti-theft performance of the nut is further enhanced.

In conclusion, the anti-theft nut is provided with the elastic retaining mechanism for blocking the rotation of the nut body and reducing the external torque so as to enable the surface to slip, thereby improving the anti-theft performance of the nut, and the anti-theft nut is convenient to manually screw up by forming reverse meshing through the internal and external double-sawtooth structure, and can be used for auxiliary positioning due to the fact that the protection ring is as long as the nut body, thereby improving the assembly efficiency of the anti-theft nut.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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.

Claims

1. The utility model provides an anti-theft nut, includes nut body (1), stopping mechanism (3), spanner rand (5) and guard ring (6), its characterized in that: internal thread (2) are arranged on the inner side wall of the nut body (1), the stopping mechanisms (3) are arranged on the front side and the rear side of the interior of the nut body (1) respectively, the stopping mechanisms (3) are distributed anticlockwise, a boss (4) is arranged at the top of the nut body (1), a wrench retainer ring (5) is sleeved on the outer side of the boss (4), and a protection ring (6) is sleeved on the bottom of the nut body (1).

2. An antitheft nut as claimed in claim 1 wherein: all be provided with tangent plane (8) on two lateral walls of the left and right sides of nut body (1), all be provided with convex surface (7) on two inside walls of the left and right sides of guard ring (6) simultaneously, and agree with each other between convex surface (7), tangent plane (8) and constitute limit structure.

3. An antitheft nut as claimed in claim 1 wherein: the anti-return mechanism is characterized in that a groove (301), a stop block (302), a spring (303) and steel balls (304) are arranged inside the anti-return mechanism (3), the stop block (302) is fixed to one side inside the groove (301), the spring (303) is welded to one side of the stop block (302), the steel balls (304) are fixed to one end of the spring (303), and the steel balls (304) slide and stretch along an arc-shaped track in the groove (301).

4. A theft-proof nut as claimed in claim 3, characterized in that: the groove (301) is of an arc structure, and the maximum depth of the groove (301) is larger than that of the internal thread (2).

5. An antitheft nut as claimed in claim 1 wherein: the outer edge of the boss (4) and the inner edge of the wrench clamping ring (5) are in saw-tooth structures with equal intervals and are meshed in opposite directions.

6. An antitheft nut as claimed in claim 1 wherein: the outer edge of the wrench clamping ring (5) is of a regular hexagon structure, and the longitudinal length of the wrench clamping ring (5) is greater than that of the boss (4).

7. An antitheft nut as claimed in claim 1 wherein: the outer diameter of the protection ring (6) is larger than the maximum outer diameter of the boss (4), and the longitudinal length of the protection ring (6) is equal to that of the nut body (1).