Self-locking fastening nut

Abstract

The utility model discloses a self-locking fastening nut, and relates to the technical field of nuts. The self-locking fastening nut comprises a first nut body and a second nut body. The locking assembly comprises a limiting ring, a groove is formed in the surface of the upper end of the first nut, a conical block is fixedly connected to the interior of the groove, an annular fixing ring is fixedly connected to the inner side of the conical block, and a plurality of radial grooves are formed in the surface of the conical block. The inner side inclined plane of the limiting ring extrudes the outer side inclined plane of the conical block, so that the conical block shrinks and deforms inwards along the radial groove, the fixing ring is driven to deform synchronously, inner side threads of the fixing ring are tightly meshed with the bolt, tiny thread-shaped deformation is generated, a mechanical self-locking structure is formed, and relative looseness of the bolt and a nut is prevented; even under the working conditions of continuous vibration, alternating load and the like, the deformation state of the conical block and the fixing ring can still be kept stable, and the problem of connection failure caused by friction force attenuation of a traditional nut is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of nuts and bolts, and in particular to a self-locking fastening nut. Background Technology

[0002] In fields such as mechanical assembly, building structures, and various equipment manufacturing, nuts, as important fastening parts used in conjunction with bolts, play a crucial role in the stability of connections between components. From the power transmission systems of heavy machinery to the steel structural frames of high-rise buildings; from the assembly of automotive and motorcycle parts to the fixing of precision equipment, nuts must ensure the reliability and stability of connections. For example, in the installation of engines in construction machinery, nuts must ensure that engine components do not loosen under high loads and severe vibrations; in the aerospace field, nuts must withstand extreme temperature changes and complex mechanical environments to ensure the safe operation of aircraft.

[0003] However, traditional nuts face many challenges in practical applications, especially in terms of their anti-loosening performance. Mechanical vibration is one of the main factors causing nuts to loosen. Continuous vibration generated during equipment operation gradually reduces the friction between the nut and bolt, causing the preload to decrease and ultimately leading to connection failure. Therefore, this invention proposes a novel solution. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, providing a self-locking nut that addresses the issue that mechanical vibration is one of the main factors causing nut loosening. Continuous vibration generated during equipment operation gradually reduces the friction between the nut and bolt, causing the preload to decrease and ultimately leading to connection failure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-locking fastening nut, comprising a first nut and a second nut;

[0006] A locking assembly is provided on the first nut. The locking assembly includes a limiting ring, which is located at the lower end of the second nut. The inner side of the limiting ring is inclined.

[0007] The upper surface of the first nut has a groove, and a conical block is fixedly connected inside the groove. The outer side of the conical block is inclined.

[0008] The inner side of the conical block is fixedly connected with a ring-shaped fixing ring, and the surface of the conical block is provided with multiple radial grooves.

[0009] Preferably, the inner sides of the first nut, the second nut, and the radial groove are all provided with threads.

[0010] Preferably, a gasket is provided on the opposite side of the first nut and the second nut.

[0011] Preferably, the upper end of the first nut is fixedly connected with a plurality of arc-shaped first anti-slip grooves.

[0012] Preferably, the lower end of the second nut is fixedly connected with a plurality of arc-shaped second anti-slip grooves.

[0013] Preferably, the lower end of the first nut is disc-shaped, the upper end of the first nut is hexagonal prism-shaped, and the lower end of the first nut is fixedly connected with multiple wavy third anti-slip patterns.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This self-locking nut, through the synergistic action of the locking components, when the second nut is tightened, the inclined surface of the inner side of the limiting ring presses against the inclined surface of the outer side of the conical block, causing the conical block to contract and deform inward along the radial groove, which drives the fixed ring to deform synchronously. This causes the inner thread of the fixed ring to tightly engage with the bolt and produce a slight tooth deformation, forming a mechanical self-locking structure that prevents the bolt and nut from loosening relative to each other. Even under conditions such as continuous vibration and alternating loads, the deformation state of the conical block and the fixed ring can remain stable, effectively solving the connection failure problem caused by frictional attenuation in traditional nuts.

[0016] 2. This self-locking nut features a washer between the first and second nuts that, when compressed, enhances the axial preload through elastic deformation, compensating for gaps caused by vibration. The wavy third anti-slip texture at the lower end of the first nut increases friction with the workpiece surface, preventing relative rotation between the first nut and the workpiece. The arc-shaped first anti-slip texture at the upper end of the first nut and the arc-shaped second anti-slip texture at the lower end of the second nut facilitate the application of greater tightening torque by the tool and reduce slippage during operation, ensuring that the limiting ring exerts sufficient pressure on the conical block. These multiple protections enhance the overall locking stability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of a self-locking fastening nut structure according to the present invention;

[0019] Figure 2 This is a schematic diagram of the connection between the first nut and the second nut of this utility model;

[0020] Figure 3 This is a schematic diagram of the second nut of this utility model;

[0021] Figure 4 This is a schematic diagram of the first nut of this utility model;

[0022] Figure 5This is a schematic diagram of the third anti-slip texture of this utility model.

[0023] Reference numerals in the attached drawings: 1. First nut; 2. Second nut; 3. Washer; 4. Groove; 5. Conical block; 6. Limiting ring; 7. Retaining ring; 8. Radial groove; 9. First anti-slip groove; 10. Second anti-slip groove; 11. Third anti-slip groove. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Please see Figure 1-5 This utility model provides a technical solution: a self-locking fastening nut, including a first nut 1 and a second nut 2, and a locking assembly. The locking assembly is disposed on the first nut 1 and includes a limiting ring 6. The limiting ring 6 is disposed at the lower end of the second nut 2, and the inner side of the limiting ring 6 is inclined. A groove 4 is formed on the upper surface of the first nut 1. A conical block 5 is fixedly connected inside the groove 4. The outer side of the conical block 5 is inclined, and an annular fixing ring 7 is fixedly connected to the inner side of the conical block 5. Multiple radial grooves 8 are formed on the surface of the conical block 5. Threads are provided on the inner sides of the first nut 1, the second nut 2, and the radial grooves 8.

[0029] Gaskets 3 are provided on the opposite sides of the first nut 1 and the second nut 2.

[0030] The upper end of the first nut 1 is fixedly connected with multiple arc-shaped first anti-slip grooves 9.

[0031] The lower end of the second nut 2 is fixedly connected with multiple arc-shaped second anti-slip grooves 10.

[0032] The lower end of the first nut 1 is disc-shaped, the upper end of the first nut 1 is hexagonal prism-shaped, and the lower end of the first nut 1 is fixedly connected with multiple wavy third anti-slip patterns 11.

[0033] Furthermore, during the assembly stage, the first nut 1 and the second nut 2 are sequentially placed on the bolt surface, so that the disc-shaped structure at the lower end of the first nut 1 fits against the workpiece surface, and the wavy third anti-slip texture 11 at its lower end contacts the workpiece surface, thereby increasing the friction force to prevent relative rotation between the first nut 1 and the workpiece; then, the second nut 2 is initially tightened, so that the limiting ring 6 at its lower end gradually approaches the groove 4 at the upper end of the first nut 1.

[0034] When the second nut 2 is tightened to the preset position, the inclined surface on the inner side of the limiting ring 6 contacts the inclined surface on the outer side of the conical block 5 and generates compression. Since the surface of the conical block 5 has multiple radial grooves 8, the compression force causes the conical block 5 to shrink and deform inward along the radial grooves 8. The fixing ring 7 on the inner side of the conical block 5 deforms synchronously with the conical block 5. The thread on its inner side is tightly attached to the bolt surface due to deformation, and the thread profile undergoes slight deformation to engage the bolt thread, forming a mechanical self-locking structure to prevent relative loosening between the bolt and the nut.

[0035] At the same time, the gaskets 3 on the opposite sides of the first nut 1 and the second nut 2 are compressed, and the elastic deformation of the gaskets 3 enhances the axial preload between them, further improving the locking effect; the arc-shaped first anti-slip texture 9 at the upper end of the first nut 1 and the arc-shaped second anti-slip texture 10 at the lower end of the second nut 2 provide anti-slip function for the tightening operation, making it easier for the operator to apply greater torque with tools, ensuring that the squeezing force of the limit ring 6 on the conical block 5 meets the standard.

[0036] Under conditions of vibration and alternating loads, the deformation state of the conical block 5 and the fixed ring 7 remains stable, and the bolt loosening is continuously restricted by the thread engagement; the elastic restoring force of the gasket 3 can compensate for the gap generated by vibration, and together with the friction limit of the third anti-slip texture 11, the overall structure can still maintain reliable locking under complex working conditions, effectively solving the loosening problem caused by the attenuation of friction in traditional nuts.

[0037] Furthermore, through the synergistic effect of the locking components, when the second nut 2 is tightened, the inner inclined surface of the limiting ring 6 presses against the outer inclined surface of the conical block 5, causing the conical block 5 to contract and deform inward along the radial groove 8, which in turn drives the fixing ring 7 to deform synchronously. This causes the inner thread of the fixing ring 7 to tightly engage the bolt and produce a small tooth deformation, forming a mechanical self-locking structure that prevents the bolt and nut from loosening relative to each other. Even under conditions such as continuous vibration and alternating loads, the deformation state of the conical block 5 and the fixing ring 7 can remain stable, effectively solving the connection failure problem caused by frictional attenuation in traditional nuts.

[0038] After the washer 3 between the first nut 1 and the second nut 2 is compressed, the axial preload is enhanced by elastic deformation, which can compensate for the gap caused by vibration. The wavy third anti-slip texture 11 at the lower end of the first nut 1 increases the friction with the workpiece surface and prevents the first nut 1 from rotating relative to the workpiece. The arc-shaped first anti-slip texture 9 at the upper end of the first nut 1 and the arc-shaped second anti-slip texture 10 at the lower end of the second nut 2 not only facilitate the application of a larger tightening torque by the tool, but also reduce slippage during operation, ensuring that the squeezing force of the limit ring 6 on the conical block 5 meets the standard. Multiple protections work together to improve the overall locking stability.

[0039] Structural Description: First Nut 1: As a basic load-bearing component, the upper end is hexagonal prism-shaped for easy tool clamping and tightening, and the lower end has a disc-shaped structure that fits the workpiece surface; the inner side is provided with threads for bolt engagement, and the groove 4 on the upper surface provides installation space for the conical block 5. The whole provides stable support for the locking assembly;

[0040] Second nut 2: It works with the first nut 1 to achieve locking. The inner side is provided with threads for bolt connection. The lower limit ring 6 is the key structure for triggering the locking assembly. By tightening, the limit ring 6 is pushed to squeeze the conical block 5 to complete the self-locking process.

[0041] Gasket 3: Located on the opposite sides of the first nut 1 and the second nut 2, after being compressed, it enhances the axial preload between the two through elastic deformation, which can compensate for the gap caused by vibration and improve the locking and sealing performance;

[0042] Groove 4: Formed on the upper surface of the first nut 1, used to fix the conical block 5, providing space for the deformation of the conical block 5, and ensuring that it can shrink smoothly under the compression of the limiting ring 6;

[0043] Conical block 5: Fixed in the groove 4, with an inclined outer side that matches the inclined inner surface of the limiting ring 6. Multiple radial grooves 8 on its surface allow it to contract and deform radially, thereby driving the fixed ring 7 to deform synchronously. It is the core component for realizing mechanical self-locking.

[0044] Limiting ring 6: Located at the lower end of the second nut 2, with an inclined inner side. When the second nut 2 is tightened, it presses against the inclined outer surface of the conical block 5, providing deformation driving force for the conical block 5 and triggering the self-locking mechanism.

[0045] Fixed ring 7: The ring structure is fixed to the inner side of the conical block 5. When the conical block 5 contracts and deforms, its inner thread tightly adheres to the bolt and produces a small tooth profile deformation. The mechanical self-locking of the bolt and nut is achieved through thread engagement.

[0046] Radial groove 8: It is formed on the surface of the conical block 5 to provide space for the conical block 5 to shrink and deform, so that the conical block 5 can shrink inward smoothly under the pressure of the limiting ring 6, and ensure the effective deformation of the fixing ring 7;

[0047] First anti-slip texture 9: Multiple arc-shaped structures are fixed to the upper end of the first nut 1 to provide anti-slip effect when the tool tightens the first nut 1, making it easier to apply greater torque and reduce slippage during operation;

[0048] Second anti-slip texture 10: Multiple arc-shaped structures are fixed to the lower end of the second nut 2 to enhance the friction between the tool and the second nut 2, making it easier to tighten the second nut 2 to ensure the squeezing force of the limiting ring 6 on the conical block 5;

[0049] The third anti-slip texture 11: Multiple wave-shaped structures are fixed at the lower end of the first nut 1 to increase the friction with the workpiece surface, prevent relative rotation between the first nut 1 and the workpiece, and improve the overall connection stability.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A self-locking fastening nut, characterized in that: Includes a first nut (1) and a second nut (2); The locking assembly is disposed on the first nut (1). The locking assembly includes a limiting ring (6), which is disposed at the lower end of the second nut (2). The inner side of the limiting ring (6) is inclined. The upper surface of the first nut (1) is provided with a groove (4), and a conical block (5) is fixedly connected inside the groove (4). The outer side of the conical block (5) is inclined. The inner side of the conical block (5) is fixedly connected with an annular fixing ring (7), and the surface of the conical block (5) is provided with multiple radial grooves (8).

2. The self-locking fastening nut according to claim 1, characterized in that: The inner sides of the first nut (1), the second nut (2), and the radial groove (8) are all provided with threads.

3. The self-locking fastening nut according to claim 1, characterized in that: Gaskets (3) are provided on the opposite surfaces of the first nut (1) and the second nut (2).

4. The self-locking fastening nut according to claim 1, characterized in that: The upper end of the first nut (1) is fixedly connected with a plurality of arc-shaped first anti-slip grooves (9).

5. A self-locking fastening nut according to claim 1, characterized in that: The lower end of the second nut (2) is fixedly connected with multiple arc-shaped second anti-slip grooves (10).

6. A self-locking fastening nut according to claim 1, characterized in that: The lower end of the first nut (1) is disc-shaped, the upper end of the first nut (1) is hexagonal prism-shaped, and the lower end of the first nut (1) is fixedly connected with multiple wavy third anti-slip patterns (11).

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