A type of anti-loosening nut assembly

Abstract

An anti-loosening nut assembly belongs to the field of fastener technology. The elastic washer itself is designed as a wavy ring with multiple symmetrical undulations. When the nut is tightened, the washer is flattened, and its wavy structure generates a continuous axial elastic force, forming a spring washer effect to compensate for bolt loosening caused by vibration. The upper surface of the elastic washer has multiple interlocking teeth with the left side higher than the right side. This design allows the inclined surface of the teeth to generate resistance when the nut tends to rotate counterclockwise and loosen, "biting" the upper nut body and effectively preventing it from rotating. By setting a nylon inner bushing, the outer wall of the inner bushing is connected to the first threaded hole of the nut body, and the inner wall forms a nut connection thread. The nylon material has good elasticity and can generate a clamping force on the bolt thread, forming an additional nylon self-locking anti-loosening effect.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, specifically relating to an anti-loosening nut assembly. Background Technology

[0002] Threaded connections, especially the fit between nuts and bolts, are one of the most basic and widely used connection methods in mechanical assembly. However, under harsh working conditions such as vibration, impact, load variations, and corrosive environments, traditional threaded fasteners have revealed several long-standing technical problems that have not been effectively solved:

[0003] Ordinary nuts mainly rely on the friction between the threads to prevent loosening. Under long-term vibration, they are prone to creep and loosening. Although single-function anti-loosening elements such as spring washers and toothed washers are widely used, their anti-loosening effect is limited. Spring washers are prone to losing elasticity when the preload is too high, while toothed washers, although they can prevent loosening, may damage the contact surface. Moreover, neither of them can provide the dual protection of axial elasticity and radial reverse locking at the same time. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art and provide an anti-loosening nut assembly.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a locking nut assembly, including an elastic washer, the nut body is disposed on the upper side of the elastic washer, the elastic washer is an open washer, the lower surface of the elastic washer is provided with an annular rubber washer, the upper surface of the elastic washer is provided with a plurality of left-high and right-low interlocking teeth, the plurality of interlocking teeth are arranged in a central annular array, the elastic washer is generally wavy annular, including a plurality of symmetrically arranged undulating parts, the nut body includes a bottom abutting platform, the diameter of the abutting platform is equal to the diameter of the elastic washer, the center of the nut body is provided with a first threaded hole, the top of the first threaded hole is provided with an abutting countersunk hole, a nylon inner sleeve is provided in the first threaded hole, the top of the nylon inner sleeve is provided with an annular retaining platform that mates with the abutting countersunk hole, and the outer wall surface of the nylon inner sleeve is threadedly connected to the first threaded hole, the inner surface of the nylon inner sleeve is provided with a nut connecting thread.

[0006] Preferably, the width of the annular rubber gasket is smaller than the width of the elastic gasket.

[0007] Preferably, the nut body and the elastic washer are made of stainless steel.

[0008] Preferably, the contact platform is made of aluminum alloy.

[0009] Preferably, the nylon inner liner is made of high-strength nylon.

[0010] The beneficial effects of this utility model are as follows: the elastic gasket itself is designed as a wave-shaped ring with multiple symmetrical undulations. When the nut is tightened, the gasket is flattened, and its wave-shaped structure generates a continuous axial elastic force, forming the effect of a spring washer, which compensates for the loosening of the bolts that may be caused by vibration.

[0011] The upper surface of the elastic washer has multiple interlocking teeth with the left side higher than the right side. This design allows the inclined surface of the teeth to generate resistance when the nut tends to rotate counterclockwise and loosen, "biting" the upper nut body and effectively preventing it from rotating back.

[0012] By setting a nylon inner liner, the outer wall of the inner liner is connected to the first threaded hole of the nut body, and the inner wall forms a nut connection thread. The nylon material has good elasticity and can generate a clamping force on the bolt thread, forming an additional nylon self-locking anti-loosening effect.

[0013] Through the synergistic design of "wavy elastic gasket + one-way interlocking teeth + rubber sealing ring + nylon inner liner", a deep integration of multiple functions such as anti-loosening, sealing, buffering, anti-seize and easy maintenance is achieved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of a structure of the annular rubber gasket of this utility model;

[0016] Figure 3 This is a schematic diagram of a structure of the nylon inner liner of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of an elastic gasket according to this utility model.

[0018] In the diagram: 1. Nut body; 2. Elastic washer; 3. Annular rubber washer; 4. Engaging teeth; 5. Undulated part; 6. First threaded hole; 7. Abutting countersunk hole; 8. Nylon inner liner; 9. Annular retaining plate; 10. Nut connection thread. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] Example: A type of anti-loosening nut assembly, such as Figures 1-4As shown, the nut body is located on the upper side of the elastic washer, which is an open washer. The lower surface of the elastic washer has an annular rubber gasket, and the upper surface of the elastic washer has multiple teeth with a left-high, right-low orientation. These teeth are arranged in a central annular array. The elastic washer is generally wavy and includes multiple symmetrically arranged undulating portions. The nut body includes a bottom abutting platform with a diameter equal to that of the elastic washer. The center of the nut body has a first threaded hole, and the top of the first threaded hole has a countersunk hole. A nylon inner sleeve is provided inside the first threaded hole. The top of the nylon inner sleeve has an annular retaining plate that mates with the countersunk hole, and the outer wall of the nylon inner sleeve is threadedly connected to the first threaded hole. The inner surface of the nylon inner sleeve has a nut connection thread.

[0021] The width of the annular rubber washer is smaller than the width of the elastic washer; the nut body and the elastic washer are made of stainless steel; the contact platform is made of aluminum alloy; and the nylon inner liner is made of high-strength nylon.

[0022] The principle of this invention is as follows: The elastic washer itself is designed as a wave-shaped ring with multiple symmetrical undulations. When the nut is tightened, the washer is flattened, and its wave-shaped structure generates a continuous axial elastic force, forming the effect of a spring washer, which compensates for bolt loosening that may occur due to vibration. The upper surface of the elastic washer is provided with multiple interlocking teeth that are higher on the left and lower on the right. This design allows the inclined surface of the teeth to generate resistance when the nut tends to rotate counterclockwise (loosen), "biting" the upper nut body or workpiece surface, effectively preventing it from rotating.

[0023] Combining the advantages of spring washers and serrated washers, it provides dual anti-loosening protection in both the axial and radial directions, and its vibration damping effect is more reliable. The lower surface of the elastic washer is equipped with an annular rubber washer. When the nut is tightened, the rubber washer is compressed, which can effectively fill the gap and play a good sealing role, preventing moisture, dust and other substances from entering the threads.

[0024] An independent nylon inner liner is built in. The outer wall of the inner liner is connected to the first threaded hole of the nut body, and the inner wall forms the nut connection thread. The annular retaining plate at the top of the inner liner cooperates with the countersunk hole to prevent the inner liner from falling off. The nylon material has good elasticity and can generate a clamping force on the bolt thread, forming an additional nylon self-locking anti-loosening effect.

[0025] Through the synergistic design of "wavy elastic gasket + one-way interlocking teeth + rubber sealing ring + nylon inner liner", a deep integration of multiple functions such as anti-loosening, sealing, buffering, anti-seize and easy maintenance is achieved.

[0026] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A locknut set comprising a locknut body and a resilient washer, characterized in that: The nut body is located on the upper side of the elastic washer. The elastic washer is an open washer. The lower surface of the elastic washer is provided with an annular rubber gasket. The upper surface of the elastic washer is provided with multiple interlocking teeth that are higher on the left and lower on the right. The multiple interlocking teeth are arranged in a central annular array. The elastic washer is generally wavy and includes multiple symmetrically arranged undulating parts. The nut body includes a bottom abutting platform with a diameter equal to that of the elastic washer. The center of the nut body is provided with a first threaded hole. The top of the first threaded hole is provided with a countersunk hole. A nylon inner liner is provided inside the first threaded hole. The top of the nylon inner liner is provided with an annular retaining plate that mates with the countersunk hole. The outer wall of the nylon inner liner is threadedly connected to the first threaded hole. The inner surface of the nylon inner liner is provided with a nut connection thread.

2. A locking nut set according to claim 1 wherein: The width of the annular rubber gasket is smaller than the width of the elastic gasket.

3. A locking nut set according to claim 1 wherein: The nut body and the elastic washer are made of stainless steel.

4. A locking nut set according to claim 1 wherein: The contact platform is made of aluminum alloy.

5. A locking nut set according to claim 1 wherein: The nylon inner liner is made of high-strength nylon.

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