CN211259324U - Circular anti-theft nut - Google Patents

Abstract

The utility model discloses a round anti-theft nut, comprising an anti-theft nut body, the outer surface of the anti-theft nut body is cylindrical, and one end of the anti-theft nut body is sleeved with a through hole matched with the anti-theft nut body for rotation of an outer hexagon wrench The inner side of the threaded hole of the anti-theft nut body is provided with one or more arc-shaped grooves in the same direction as the thread. One end of the arc-shaped groove is a vertical deep groove, and the other end transitions with the threaded arc. A steel ball is arranged in each groove, and the diameter of the steel ball is the same as the depth of the vertical deep groove of the arc groove. The anti-theft nut of the utility model can be fastened and installed by a common hexagon wrench, which is extremely convenient.

Description

A round anti-theft nut

technical field

The utility model relates to a round anti-theft nut.

Background technique

At present, fasteners are widely used in various structural parts. Common fasteners are bolts and hexagon nuts (hexagon socket nuts or external hexagon nuts). Most common nuts are used in conjunction with spring washers, split pins, etc. Looseness, the anti-loosening effect is not good, and the existing nut is easy to be disassembled artificially, and the anti-theft effect is not good.

In the round anti-theft nut (Patent No. 2014202452032) applied by the inventor earlier, there is disclosed a technical solution of setting three inclined grooves at one end of the anti-theft nut and tightening it with special tools, but due to the need for special tools (with three bulge) to implement the tightening operation, which will be limited in actual use, so further improvement is required.

SUMMARY OF THE INVENTION

In order to solve the problem that the above-mentioned anti-theft nut needs special tools when tightening, which affects the use, the utility model provides a round anti-theft nut. The technical solution is as follows.

A round anti-theft nut includes a anti-theft nut body, the outer surface of the anti-theft nut body is cylindrical, and one end of the anti-theft nut body is sleeved with a through hole matching the anti-theft nut body. And fixed, the inside of the anti-theft nut body threaded hole has more than one arc groove in the same direction as the thread, one end of the arc groove is a vertical deep groove, and the other end transitions with the threaded arc, each arc groove is provided with A steel ball, the diameter of the steel ball is the same as the depth of the vertical deep groove of the arc groove.

In the utility model, the outer surface of the anti-theft nut body is cylindrical, and one end is provided with a hexagonal tab, which can be rotated by using an ordinary external hexagonal wrench in cooperation with it, and can be tightened without a special wrench, which is more convenient; The nut is screwed onto the bolt, and the bolt pushes the steel ball to roll to the vertical deep groove of the arc-shaped groove. At this time, the rotation of the nut and the bolt is not affected. The outer thread of the bolt drives the rolling towards the shallow end of the arc groove, and the steel ball acts as a squeeze between the nut and the bolt, preventing the relative rotation of the nut and the bolt, and the nut cannot be removed from the bolt, and it is not easy to loose. , and because it cannot be disassembled, it also achieves the purpose of anti-theft.

As a further improvement of the present invention, it also includes an inner sleeve with a smooth outer side, the inner sleeve is arranged in the threaded hole and its outer diameter is equal to the small diameter of the thread, so that the steel ball is confined in the arc-shaped groove.

The inner sleeve can prevent the steel ball from falling off before the nut is fixed on the bolt. The inner sleeve is installed from one end of the anti-theft nut body, so that the steel ball is limited to the arc-shaped groove, so that the steel ball cannot fall from the arc-shaped groove. When in use, as the bolt is screwed in, the inner sleeve is knocked off by the bolt, and the steel ball is limited in the arc groove by the bolt.

As a further improvement of the present invention, it also includes a jacket, one end of the anti-theft nut body with the hexagonal tabs has a larger outer diameter than the other end, and the jacket is sleeved on the end of the anti-theft nut body with a smaller outer diameter, and The length of the jacket is less than or equal to the length of the end with the smaller outer diameter of the anti-theft nut body.

Set the jacket. When the bolt is forced to rotate with a wrench, the wrench clamps the jacket. When the wrench is pulled, the jacket will rotate on the nut, but the anti-theft nut body will not move, so no matter how much force is applied, it will not affect the nut. damage to the nut.

As a further improvement of the present invention, there are three arc-shaped grooves, which are evenly arranged inside the threaded hole of the anti-theft nut body.

Set up three arc grooves, the number is the best, that is to prevent the nut from being removed, and it will not cause too few effective threads for fixing due to too many arc grooves, and the rigidity of the nut can also be guaranteed. .

As a further improvement of the present invention, the end of the anti-theft nut body with the smaller outer diameter is provided with more than one cut surface.

Set the cut surface, which is convenient to fix it when making the thread, and prevent the nut from turning when making the inner thread.

As a further improvement of the present invention, the number of the cut surfaces is three.

As a further improvement of the present invention, the hexagonal chamfers of the hexagonal convex pieces are rounded.

Set the arc angle to make the appearance beautiful.

To sum up, the beneficial effects of the present invention are as follows: the problem that the existing anti-theft nut needs special tools to be tightened and affects the use is solved, and the structure is simple, the installation is simple, and the performance is reliable.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

FIG. 2 is a schematic diagram reflecting the structure of the anti-theft nut body in the present invention.

FIG. 3 is a schematic structural diagram reflecting the assembly of the anti-theft nut body and the steel ball in the present invention.

Among them: 1. Anti-theft nut body; 2. Hexagonal tab; 3. Arc groove; 4. Steel ball; 5. Inner sleeve; 6. Outer jacket; 7. Cut surface.

Detailed ways

The specific embodiments of the present utility model will be further described below with reference to the accompanying drawings.

The anti-theft nut shown in Figures 1 to 3 includes a anti-theft nut body 1, an inner sleeve 5 and an outer casing 6. The outer surface of the anti-theft nut body 1 is cylindrical, and one end of the anti-theft nut body 1 has a larger outer diameter than the other end. , the end with the larger outer diameter is sleeved with the hexagonal tab 2 that has a matching through hole with the anti-theft nut body 1 for the outer hexagonal wrench to be pulled and fixed by welding, and the hexagonal chamfer of the hexagonal tab 2 1. The outer surface of the end with the smaller outer diameter is evenly set with three cut surfaces 7. The inner side of the threaded hole of the anti-theft nut body 1 is evenly opened with three arc-shaped grooves 3 with the same thread direction, and one end of the arc-shaped groove 3 is a vertical deep groove. , the other end transitions with the threaded arc, and each arc groove 3 is provided with a steel ball 4, and the diameter of the steel ball 4 is the same as the depth of the vertical deep groove of the arc groove 3; the inner sleeve 5 is arranged on the thread The outer diameter of the hole is equal to the small diameter of the thread, so that the steel ball 4 is limited to the arc groove 3; or equal to the length of the end with the smaller outer diameter of the anti-theft nut body 1 .

The working process of the anti-theft nut of the utility model is as follows: cover the outer sleeve 6 on the end of the anti-theft nut body 1 with a smaller outer diameter, use a common hexagonal wrench to cooperate with the hexagonal tabs 2 at the end of the anti-theft nut body 1, and rotate the nut, When the inner sleeve 5 is removed, and the anti-theft nut body 1 rotates, the bolt pushes the steel ball 4 to roll toward the vertical deep groove of the arc-shaped groove 3. At this time, the relative rotation of the anti-theft nut body 1 and the bolt is not affected. After the bolt is fixed, If the hexagonal wrench is used to rotate in the opposite direction, the steel ball 4 is driven by the external thread of the bolt to roll toward the shallow end of the arc groove 3. At this time, the steel ball 4 prevents the relative rotation of the anti-theft nut body 1 and the bolt to prevent the anti-theft nut from rotating. Loose and theft purpose. If an ordinary wrench is used to clamp the outer casing 6 and apply force, the outer casing 6 rotates on the anti-theft nut body 1, and the anti-theft nut body 1 does not move, and the nut cannot be removed.

What is not specifically described in the present invention is the prior art, or can be realized through the prior art, and it should be understood that the specific implementation cases described in the present utility model are only the preferred implementation cases of the present utility model. It is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patented scope of the present utility model shall be regarded as the technical scope of the present utility model.

Claims (7)

1. A circular anti-theft nut, comprising an anti-theft nut body, characterized in that the outer surface of the anti-theft nut body is cylindrical, and an external hexagon wrench with a through hole matching the anti-theft nut body is sleeved at one end of the anti-theft nut body. The hexagonal tabs for rotation are fixed, and the inside of the threaded hole of the anti-theft nut body is provided with more than one arc-shaped groove in the same direction as the thread. One end of the arc-shaped groove is a vertical deep groove, and the other end transitions with the thread arc. A steel ball is arranged in each of the arc-shaped grooves, and the diameter of the steel ball is the same as the depth of the vertical deep groove of the arc-shaped groove. 2. The anti-theft nut according to claim 1, further comprising an inner sleeve with a smooth outer side, the inner sleeve is arranged in the threaded hole and its outer diameter is equal to the small diameter of the thread, so that the steel ball is limited to the arc. inside the groove. 3. The anti-theft nut according to claim 1 or 2, characterized in that it further comprises a jacket, one end of the anti-theft nut body provided with the hexagonal tabs has an outer diameter larger than the other end, and the jacket is fitted over the anti-theft nut. The end of the body with the smaller outer diameter, and the length of the jacket is less than or equal to the length of the end with the smaller outer diameter of the anti-theft nut body. 4 . The anti-theft nut according to claim 3 , wherein there are three arc-shaped grooves, which are evenly arranged inside the threaded holes of the anti-theft nut body. 5 . 5 . The anti-theft nut according to claim 4 , wherein the end of the anti-theft nut body with a smaller outer diameter is provided with more than one cut surface. 6 . 6 . The anti-theft nut according to claim 5 , wherein the number of the cut surfaces is three. 7 . 7 . The anti-theft nut according to claim 6 , wherein the hexagonal chamfers of the hexagonal tabs are rounded. 8 .

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