Anti-loose and anti-theft nut and its dismounting tool

Abstract

The application discloses a kind of anti-loose theft-proof nut and its dismounting tool, provide a kind of anti-loose theft-proof nut with good theft-proof effect, installation is simple, easy to manufacture, and the dismounting tool for dismounting the anti-loose theft-proof nut.The anti-loose theft-proof nut in the application includes main nut and compression ring, main nut includes threaded bearing part, and the contraction threaded part extending outward is arranged along the threaded bearing part coaxial axial direction, and the contraction threaded part is arranged between threaded bearing part and deformation connecting part, the outer surface of contraction threaded part is conical surface, the compression ring is annular, the inner surface of compression ring is mutually matched with the outer surface of contraction threaded part, and a plurality of extrusion grooves are arranged on the outer surface of compression ring.The dismounting tool in the application includes main body and screw, recess is arranged in the bottom of main body, and the recess includes clamping part and covering part, the diameter of covering part is greater than that of clamping part, a plurality of mounting holes are arranged in clamping part of main body, screw thread is arranged in mounting hole, and screw hole matched with screw is arranged in the top end of main body.The application is applied to fastener technical field.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fastener, in particular to a kind of anti-loose anti-theft nut and its dismounting tool. BACKGROUND

[0002] Bolt nut screw and other fasteners are the main structure for connecting mechanical components. Ordinary fasteners are prone to looseness under vibration, leading to equipment failure, and even safety accidents, property loss and personal safety. Therefore, the anti-loose problem of fasteners is increasingly valued. At the same time, for some outdoor unattended equipment, such as some power facilities, rail transit facilities and communication facilities, the fasteners used also need to have anti-theft function to prevent intentional disassembly and damage.

[0003] For bolt and nut connection, there are many anti-loose nuts that can prevent loosening, such as Japanese Hadlock nut, but none of them have anti-theft function. SUMMARY

[0004] The present application solves the technical problems of the prior art and provides an anti-loose anti-theft nut that not only has good anti-loose effect but also can prevent theft, is easy to install and manufacture.

[0005] The present application solves the technical problems of the prior art and provides an anti-loose anti-theft nut, which comprises a main nut and a compression ring. The main nut comprises a threaded bearing portion, a contraction threaded portion extending outward is arranged coaxially and axially along the threaded bearing portion, a deformation connecting portion is arranged between the contraction threaded portion and the threaded bearing portion, the outer surface of the contraction threaded portion is a conical surface, the compression ring is annular, the inner surface of the compression ring cooperates with the outer surface of the contraction threaded portion, and a plurality of extrusion grooves are formed in the outer surface of the compression ring.

[0006] Further optimization, anti-slip patterns are arranged in the extrusion grooves.

[0007] Further optimization, the top and bottom openings of the compression ring are A opening and B opening respectively, and the diameter of the A opening is smaller than that of the B opening.

[0008] The present application also provides a dismounting tool for dismounting the above-mentioned anti-loose anti-theft nut, which comprises a main body and a screw. A recess is formed in the bottom of the main body, the recess comprises a clamping portion and a covering portion, the diameter of the covering portion is larger than that of the clamping portion, a plurality of mounting holes are formed in the clamping portion of the main body, threads are arranged in the mounting holes, a screw hole is formed in the top end of the main body and cooperates with the screw, and the bottom end of the screw hole is connected with the top end of the clamping portion.

[0009] Further preferably, the groove depth is equal to the height of the thread bearing portion of the main nut in combination with the compression ring.

[0010] Further preferably, the diameter of the screw hole is smaller than the diameter of the clamping portion.

[0011] Further preferably, the main body is provided with mortises, the horizontal height of which is higher than that of the mounting hole, thereby improving the efficiency of the dismounting tool in performing the dismounting operation.

[0012] The anti-loosening and anti-theft nut provided by the present application is self-locked through the cooperation of the main nut and the compression ring, and the compression ring cannot be dismounted with common tools due to the absence of edges and corners on the outer surface of the compression ring. In the case where the compression ring is not dismounted, the main nut cannot be dismounted, thereby achieving the anti-theft function. The compression ring has a simple structure and is easy to manufacture, thereby reducing the production cost.

[0013] The dismounting tool provided by the present application is a special dismounting tool for the anti-loosening and anti-theft nut, which is provided with a plurality of mounting holes in the clamping portion of the groove. After the jacking bolt is screwed into the mounting hole, the compression ring is subjected to inward extrusion, so that the compression ring and the main nut are disengaged from the self-locking state, thereby facilitating the dismounting. The mortises provided on the main body can be inserted with a lever during dismounting, thereby reducing the dismounting difficulty and improving the dismounting efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0015] Figure 1 FIG. 1 is a structural schematic diagram of the anti-loosening and anti-theft nut in the present application;

[0016] Figure 2 FIG. 2 is a sectional view of the main nut in the present application;

[0017] Figure 3 FIG. 3 is a structural schematic diagram of the compression ring in the present application;

[0018] Figure 4 FIG. 4 is a sectional view of the compression ring in the present application;

[0019] Figure 5 FIG. 5 is a structural schematic diagram of the dismounting tool in the present application;

[0020] Figure 6 FIG. 6 is a sectional view of the dismounting tool in the present application;

[0021] Figure 7 It is the working schematic diagram of the anti-loose and anti-theft bolt installation in the application;

[0022] Figure 8 It is the working schematic diagram of the anti-loose and anti-theft bolt installation in the application; DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0024] As shown in Figures 1 to 4 , the anti-loose and anti-theft nut comprises a main nut 1 and a press ring 2, the main nut 1 comprises a threaded bearing part 4, a shrinkage threaded part 5 extending outward is coaxially and axially arranged along the threaded bearing part 4, a deformation connecting part 6 is arranged between the shrinkage threaded part 5 and the threaded bearing part 4, the outer surface of the shrinkage threaded part 5 is a conical surface, the press ring 2 is annular, the inner surface of the press ring 2 cooperates with the outer surface of the shrinkage threaded part 5, a plurality of extrusion grooves 7 are arranged on the outer surface of the press ring 2, anti-skid lines are arranged in the extrusion grooves 7, the top and bottom openings of the press ring 2 are A opening 16 and B opening 17 respectively, the diameter of the A opening 16 is smaller than the diameter of the B opening 17.

[0025] As shown in Figures 5 to 6 , as a special dismounting tool of the anti-loose and anti-theft nut, the dismounting tool 3 is used in combination with the anti-loose and anti-theft nut, the dismounting tool 3 comprises a main body 8 and a screw 9, a recess 10 is arranged at the bottom of the main body 8, the recess 10 comprises a clamping part 11 and a cladding part 12, the diameter of the cladding part 12 is larger than that of the clamping part 11, a plurality of installation holes 13 are arranged in the clamping part 11 of the main body 8, threads are arranged in the installation holes 13, a screw hole 14 matched with the screw 9 is arranged at the top end of the main body 8, the bottom end of the screw hole 14 is connected with the top end of the clamping part 11, the depth of the recess 10 is equal to the height of the combination of the threaded bearing part 4 of the main nut 1 and the press ring 2, the diameter of the screw hole 14 is smaller than that of the clamping part 11, a plurality of mortises 15 are arranged in the main body 8, the horizontal height of the mortises 15 is higher than that of the installation holes 13, and the efficiency of the dismounting tool 3 in performing dismounting operation is improved.

[0026] As shown in Figure 7As shown, during installation, the anti-loosening and anti-theft nut is first screwed into the matching bolt. The threaded bearing portion 4 is close to the workpiece to be fastened. After tightening to the specified torque to achieve the required clamping force, one end of the B-port 17 of the pressure ring 2 is placed on the shrinking thread portion 5. Then, a standard nut is screwed into the external thread of the bolt, pressing the pressure ring 2 downwards. Through the interaction between the inner surface of the pressure ring 2 and the outer surface of the shrinking thread portion 5, the thread shrinking portion shrinks inwards until the internal thread of the thread shrinking portion presses against the external thread of the bolt. Finally, tighten... Unlike ordinary nuts, the main nut 1 is self-locking because the force exerted inward by the inner surface of the pressure ring 2 and the outer surface of the shrinking thread 5, combined with the outward repulsion force of the external thread of the internal thread of the shrinking thread clamping the bolt, creates a strong interaction force. This prevents loosening. Furthermore, since the outer surface of the pressure ring 2 has no sharp edges, it is difficult to remove using common tools. Without removing the pressure ring 2, the deformed internal thread of the shrinking thread continuously clamps the external thread of the bolt, preventing the main nut 1 from being removed, thus achieving the purpose of theft prevention.

[0027] like Figure 8 As shown, when disassembling, the groove 10 at the bottom of the disassembly tool 3 covers the combination of the main nut 1 and the pressure ring 2. The tightening part corresponds to the position of the pressure ring 2. Then, after aligning the mounting hole 13 with the extrusion groove 7, the matching bolt is screwed into the mounting hole 13 to apply an inward pressing force to the pressure ring 2 and fix the pressure ring 2. Then, the screw 9 is screwed into the screw hole 14 at the top of the disassembly tool 3. The screw 9 pushes against the bolt fixing the main nut 1 to generate an upward force to pull the pressure ring 2 outward. Then, the main nut 1 is disassembled with a general tool.

[0028] To improve efficiency during disassembly, the main body 8 is provided with a number of mortises 15, and the horizontal height of the mortises 15 is higher than that of the mounting hole 13. When pulling the pressure ring 2 upward, a lever can be inserted into the mortises 15 to reduce the difficulty of disassembly and improve efficiency.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A theft-proof and anti-loose nut comprising a main nut (1) and a press ring (2), characterized in that: The main nut (1) comprises a threaded bearing part (4), a tapered threaded part (5) extending outward is coaxially and axially arranged along the threaded bearing part (4), a deformation connecting part (6) is arranged between the threaded bearing part (4) and the tapered threaded part (5), the outer surface of the tapered threaded part (5) is a tapered surface, the compression ring (2) is annular, the inner surface of the compression ring (2) cooperates with the outer surface of the tapered threaded part (5), a plurality of extrusion grooves (7) are arranged on the outer surface of the compression ring (2), anti-skid lines are arranged in the extrusion grooves (7), the top and bottom openings of the compression ring (2) are respectively A opening (16) and B opening (17), the diameter of the A opening (16) is smaller than that of the B opening (17).

2. A tool for removing the tamperproof nut of claim 1, characterized in that: The dismounting tool (3) comprises a main body (8) and a screw (9), a recess (10) is arranged at the bottom of the main body (8), the recess (10) comprises a clamping part (11) and a covering part (12), the diameter of the covering part (12) is larger than that of the clamping part (11), a plurality of installation holes (13) are arranged in the clamping part (11) of the main body (8), threads are arranged in the installation holes (13), a screw hole (14) is arranged at the top end of the main body (8) and cooperates with the screw (9), the bottom end of the screw hole (14) is connected with the top end of the clamping part (11), a plurality of mortises (15) are arranged in the main body (8), the horizontal height of the mortises (15) is higher than that of the installation holes (13).

3. The tool of claim 2, wherein: The depth of the recess (10) is equal to the height of the combination of the threaded bearing part (4) of the main nut (1) and the compression ring (2).

4. The tool of claim 2, wherein: The diameter of the screw hole (14) is smaller than that of the clamping part (11).

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