Hexagon lock nut with anti-loose tooth pattern

Abstract

The utility model discloses a hexagonal locking nut with anti-loose tooth pattern relates to the technical field of assembly fastener, including the nut body, the nut body is hexagonal cylinder, and the inner thread hole of being equipped with the penetration in the center, at least one end face of the nut body is provided with the anti-loose tooth pattern, the anti-loose tooth pattern is arranged around the annular region of inner thread hole, and the anti-loose tooth pattern is composed of a plurality of anti-loose tooth units that are evenly distributed along the circumferential direction, every anti-loose tooth unit includes a main tooth and a plurality of auxiliary teeth, one side of the nut body is provided with the anti-loose limit hole, and one side in the inside of the anti-loose limit hole is provided with the connecting thread. The utility model discloses a composite tooth pattern structure that is formed by setting the main tooth and the auxiliary tooth, the main tooth provides the main resistance to torsion, the auxiliary tooth increases the contact point and the microscopic occlusal force, forms multiple anti-loose mechanism, in the tightening process, the tooth pattern and the surface of the connected piece or the washer produce mechanical inlay, effectively prevent the nut reverse rotation.

Description

Technical Field

[0001] This utility model relates to the field of assembly fastener technology, specifically a hexagonal lock nut with anti-loosening teeth. Background Technology

[0002] Hex nuts, as standard fasteners widely used in mechanical connections, are typically used in conjunction with bolts or threaded rods to achieve detachable connections between components. However, in working environments subjected to long-term vibration, impact, or alternating loads, traditional hex nuts are prone to loosening due to fretting and slippage, leading to a decrease in preload or even connection failure, which can seriously cause equipment malfunctions or safety accidents. Therefore, anti-loosening performance has become one of the important indicators for measuring the reliability of fasteners.

[0003] To improve the anti-loosening ability of nuts, various improvement schemes have been proposed in the existing technology. Common anti-loosening measures include using spring washers, double nuts, nylon insert lock nuts, and flange-face toothed nuts. Among them, flange-face toothed nuts, by setting a radial serrated structure on the nut support surface, allow the serrations to embed into the surface of the connected parts during tightening, using mechanical interlocking to prevent the nut from rotating, thus having a certain anti-loosening effect.

[0004] However, such toothed structures have a single tooth distribution and rely solely on macroscopic interlocking, lacking a multi-layered anti-loosening mechanism. They may still experience slow loosening under high-frequency vibration environments. Therefore, it is necessary to provide a novel hexagonal lock nut with anti-loosening function that can ensure reliable anti-loosening performance while reducing damage to the surface of the connected parts, and possesses the advantages of simple structure, ease of manufacturing, and installation. Thus, this utility model proposes a hexagonal lock nut with anti-loosening teeth. Utility Model Content

[0005] Technical problems to be solved The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hexagonal lock nut with anti-loosening teeth.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hexagonal lock nut with anti-loosening teeth, comprising a nut body, wherein the nut body is a hexagonal prism with a through internal thread hole at the center, and anti-loosening teeth are provided on at least one end face of the nut body. The anti-loosening teeth are arranged around the annular area of ​​the internal thread hole, and the anti-loosening teeth are composed of multiple anti-loosening tooth units evenly distributed along the circumferential direction. Each anti-loosening tooth unit includes one main tooth and multiple auxiliary teeth. By setting a composite tooth structure composed of main teeth and auxiliary teeth, the main tooth provides the main anti-torsional resistance, and the auxiliary teeth increase the contact points and micro-biting force, forming a multiple anti-loosening mechanism. During the tightening process, the teeth mechanically engage with the surface of the connected part or washer, effectively preventing the nut from rotating in the opposite direction.

[0008] The nut body has an anti-loosening limiting hole on one side, and a connecting thread is provided on the inner side of the anti-loosening limiting hole. The internal thread of the anti-loosening limiting hole is connected to a limiting stud.

[0009] Preferably, the tooth shape of the main tooth is trapezoidal or rectangular, with a tooth tip width of 0.2-0.8 mm, a tooth height of 0.1-0.5 mm, and an angle between the tooth side and the end face of 60°-90°.

[0010] Preferably, the auxiliary tooth is located radially inside or outside the main tooth, and its tooth shape is triangular or semi-circular.

[0011] Preferably, the auxiliary tooth is smaller than the main tooth, and the tooth height is 0.05-0.3mm.

[0012] Preferably, the spacing between adjacent anti-loosening tooth units is 1.0-3.0 mm.

[0013] Preferably, the distribution area of ​​the anti-loosening teeth is located in an annular area from 2 mm from the edge of the internal threaded hole to 5 mm from the edge of the outer circumference of the hexagonal prism.

[0014] Preferably, the anti-loosening teeth are integrally formed with the nut body.

[0015] Beneficial effects

[0016] Compared with existing technologies, this hexagonal lock nut with anti-loosening teeth has the following advantages: This invention utilizes a composite toothed structure consisting of main teeth and auxiliary teeth. The main teeth provide the primary anti-torsional resistance, while the auxiliary teeth increase contact points and micro-engagement force, forming a multi-layered anti-loosening mechanism. During tightening, the teeth mechanically engage with the surface of the connected component or washer, effectively preventing the nut from rotating in the opposite direction. Unlike flange-face toothed nuts, this invention features a lower tooth height and trapezoidal / rectangular main teeth, resulting in relatively dispersed contact stress. It primarily relies on friction and micro-engagement to achieve anti-loosening, avoiding the severe piercing or scratching of the connected component surface caused by sharp serrations. This protects the integrity and aesthetics of the connected component, making it particularly suitable for applications requiring high surface finish. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the anti-loosening tooth pattern of this utility model; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the installation structure of the limiting stud of this utility model.

[0019] In the picture: 1. Nut body; 2. Internal threaded hole; 3. Anti-loosening teeth; 31. Anti-loosening tooth unit; 311. Main tooth; 312. Multiple auxiliary teeth; 4. Anti-loosening limit hole; 5. Connecting thread; 6. Limiting stud. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4As shown, this utility model provides a technical solution: a hexagonal lock nut with anti-loosening teeth, including a nut body 1, the nut body 1 being a hexagonal prism with a through internal threaded hole 2 in the center, and anti-loosening teeth 3 provided on at least one end face of the nut body 1, the anti-loosening teeth 3 being arranged around the annular area of ​​the internal threaded hole 2, and the anti-loosening teeth 3 being composed of multiple anti-loosening tooth units 31 evenly distributed along the circumference, each anti-loosening tooth unit 31 including a main tooth 311 and multiple auxiliary teeth 312, by setting a composite tooth structure composed of main teeth and auxiliary teeth, the main teeth provide the main anti-torsional resistance, and the auxiliary teeth increase the contact points and micro-biting force, forming a multiple anti-loosening mechanism, during the tightening process, the teeth mechanically engage with the surface of the connected part or washer, effectively preventing the nut from rotating in the opposite direction.

[0022] The nut body 1 of this utility model is provided with an anti-loosening limiting hole 4 on one side, and a connecting thread 5 is provided on one side of the anti-loosening limiting hole 4. The internal thread of the anti-loosening limiting hole 4 is connected to a limiting stud 6.

[0023] Please refer to the following carefully. Figure 1 and Figure 2 The tooth profile of the main tooth 311 is trapezoidal or rectangular, with a tooth tip width of 0.2-0.8 mm, a tooth height of 0.1-0.5 mm, and an angle between the tooth flank and the end face of 60°-90°. The auxiliary tooth 312 is located radially inside or outside the main tooth 311, with a tooth profile of triangular or semi-circular. The auxiliary tooth 312 is smaller than the main tooth, with a tooth height of 0.05-0.3 mm.

[0024] In this utility model, the spacing between adjacent anti-loosening tooth units 31 is 1.0-3.0mm, and the distribution area of ​​the anti-loosening tooth pattern 3 is located in an annular area from 2mm from the edge of the internal thread hole to 5mm from the outer edge of the hexagonal prism. The anti-loosening tooth pattern 3 is integrally formed with the nut body 1.

[0025] Working Principle: During assembly, when the nut is fitted onto the bolt and tightened to the surface of the connected parts, the anti-loosening teeth on the end face of the nut body simultaneously press against the surface of the connector or washer. These anti-loosening teeth consist of multiple anti-loosening tooth units evenly distributed along the circumference. Each anti-loosening tooth unit includes one main tooth and several smaller auxiliary teeth. The main tooth has a trapezoidal or rectangular cross-section, possessing high structural strength and a moderate tooth height (0.1–0.5 mm). During tightening, it generates the main anti-torsional resistance, forming a stable supporting contact surface and avoiding stress concentration. The auxiliary teeth are distributed radially inside or outside the main tooth, in a triangular or semi-circular shape, with a lower height (0.05–0.3 mm). Based on the macroscopic interlocking formed by the main tooth, they further increase the number of microscopic contact points with the connected parts, enhancing interfacial friction and localized engagement, thus forming a multi-layered anti-loosening mechanism of "main resistance + micro-interlocking".

[0026] Because the anti-loosening teeth have a low overall height and rounded teeth, their function is mainly through moderate mechanical engagement and high frictional resistance, rather than deep penetration into the material surface. Therefore, they effectively reduce damage to the surface of the connected parts and are suitable for applications with high surface quality requirements.

[0027] In addition, the nut body has an anti-loosening limiting hole on its side, with a connecting thread inside, which can be used to install a limiting stud. After the nut is tightened to the correct position, the limiting stud can be screwed in and pressed against the bolt shank or adjacent structure as needed, forming a mechanical stop to prevent the nut from rotating as a whole under extreme vibration conditions. This limiting structure can be selectively activated, enhancing the anti-loosening reliability of the nut in critical parts.

[0028] In summary, this application achieves a multi-level, low-damage, and highly reliable anti-loosening effect by combining a composite toothed structure with an optional limiting stud, thus solving the problems of traditional toothed nuts easily damaging the workpiece surface and having a single anti-loosening mechanism.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hexagonal lock nut with anti-loosening teeth, comprising a nut body (1), wherein the nut body (1) is a hexagonal prism with a through internal threaded hole (2) at its center, characterized in that: At least one end face of the nut body (1) is provided with anti-loosening teeth (3). The anti-loosening teeth (3) are provided around the annular area of ​​the internal thread hole (2). The anti-loosening teeth (3) are composed of multiple anti-loosening tooth units (31) evenly distributed along the circumferential direction. Each anti-loosening tooth unit (31) includes a main tooth (311) and multiple auxiliary teeth (312). The nut body (1) has an anti-loosening limiting hole (4) on one side, and a connecting thread (5) is provided on one side of the anti-loosening limiting hole (4). The internal thread of the anti-loosening limiting hole (4) is connected to a limiting stud (6).

2. A hexagonal lock nut with anti-loosening teeth according to claim 1, characterized in that: The tooth shape of the main tooth (311) is trapezoidal or rectangular, with a tooth tip width of 0.2-0.8 mm, a tooth height of 0.1-0.5 mm, and an angle between the tooth side and the end face of 60°-90°.

3. A hexagonal lock nut with anti-loosening teeth according to claim 1, characterized in that: The auxiliary tooth (312) is located radially inside or outside the main tooth (311), and its tooth shape is triangular or semi-circular.

4. A hexagonal lock nut with anti-loosening teeth according to claim 1, characterized in that: The auxiliary tooth (312) is smaller than the main tooth (311) and has a tooth height of 0.05-0.3mm.

5. A hexagonal lock nut with anti-loosening teeth according to claim 1, characterized in that: The spacing between adjacent anti-loosening tooth units (31) is 1.0-3.0 mm.

6. A hexagonal lock nut with anti-loosening teeth according to claim 1, characterized in that: The distribution area of ​​the anti-loosening teeth (3) is located in an annular area from 2 mm from the edge of the internal threaded hole to 5 mm from the edge of the outer circle of the hexagonal prism.

7. A hexagonal lock nut with anti-loosening teeth according to claim 1, characterized in that: The anti-loosening teeth (3) are integrally formed with the nut body (1).

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