Lock nut

Abstract

The utility model relates to the technical field of fasteners, and provides a locknut which comprises a first main body, the first main body is provided with a threaded hole, the threaded hole is provided with a receding groove and a clamping groove, a second main body is arranged in the receding groove, the second main body is provided with a through hole, and an included angle is formed between the axis of the through hole and the axis of the threaded hole. And the third main body is pressed on the second main body and is provided with a clamping part, and the clamping part is clamped in the clamping groove. By means of the technical scheme, the problem that in the prior art, an anti-loosening nut is poor in anti-loosening effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and in particular to a locking nut. Background Art

[0002] Nuts and bolts are a common connection method in many mechanical connection scenarios, but the problem of loose nuts has long plagued the industry. Traditional nuts often loosen during operation due to factors such as vibration, impact, and temperature fluctuations. For example, in mechanical equipment, continuous operating vibration can cause nuts to gradually unscrew. The bumps and vibrations of vehicles can also easily loosen nuts, affecting driving safety. Building structures are subjected to long-term exposure to the elements, including wind, rain, and vibrations. Loose nuts can endanger the overall stability of the building.

[0003] Traditional anti-loosening methods have numerous shortcomings. Friction-based spring washers are prone to losing their spring force, while double nuts require additional components and space and have limited anti-loosening effectiveness. Mechanically-based slotted nuts require additional pins, which are inconvenient to operate and prone to falling out. Lock washers are complex to install and require high precision. Adhesive anti-loosening glues have poor durability and are prone to failure due to temperature fluctuations. These issues have prompted the development of new anti-loosening nuts to improve connection stability and reliability, reduce costs and installation difficulty, and meet the growing demand for nut anti-loosening performance in various fields. Utility Model Content

[0004] The utility model provides an anti-loosening nut, which solves the problem of poor anti-loosening effect of anti-loosening nuts in the related art.

[0005] The technical solution of the utility model is as follows:

[0006] A locking nut comprising

[0007] A first main body, wherein the first main body has a threaded hole, and the threaded hole has a clearance groove and a clamping groove,

[0008] The second body is arranged in the said giving way groove, and the second body has a through hole, and the axis of the through hole is arranged at an angle with the axis of the said threaded hole.

[0009] The third body is pressed on the second body, and the third body has a clamping portion, which is clamped in the clamping groove.

[0010] As a further technical solution, the third body has a pressing portion, which is pressed on the second body and is located on one side of the clamping portion.

[0011] As a further technical solution, the clamping part is an elastic clamping part, the clamping groove has a clamping section and a guide groove, the guide groove leads to the clamping section, the clamping part is clamped in the clamping groove, and the guide groove is used to guide the clamping part to slide into the clamping section.

[0012] As a further technical solution, the third body is an annular concave gasket.

[0013] As a further technical solution, the second main body has a tapered portion and a columnar portion, the relief groove has a tapered accommodating groove and a columnar accommodating groove, and the tapered accommodating groove is used to accommodate the tapered portion.

[0014] As a further technical solution, the angle between the axis of the through hole and the axis of the clearance groove is 2°.

[0015] As a further technical solution, the height of the cylindrical receiving groove and the cylindrical portion is not less than 1 / 3 of the height of the first main body axis.

[0016] As a further technical solution, the second body is a notch-type elastic ring gasket.

[0017] As a further technical solution, the annular deflection angle of the second body is 2° along the axial direction of the through hole.

[0018] As a further technical solution, the second body is an annular gasket, and the angle between the axis of the through hole and the axis of the threaded hole is 3°~5°.

[0019] The working principle and beneficial effects of the utility model are as follows:

[0020] In the present invention, the first body is a nut. The axis of the through hole of the second body is set at an angle to the axis of the threaded hole, so that when the bolt is subjected to vibration or external force, the second body will generate a force in the opposite direction of the loosening of the bolt. This unique structure increases the friction between the nut and the bolt, forming a reliable anti-loosening mechanism, effectively preventing the nut from being loosened due to vibration, impact and other factors, and greatly improving the stability and reliability of the connection. The clearance groove of the first body is closely matched with the second body to ensure the stable installation of the second body inside the nut. This structural design enables the entire anti-loosening nut to maintain the integrity of the overall structure when subjected to various loads, and is not prone to deformation or damage. Even under large tensile, compressive or shear forces, the nut can reliably fix the bolt to ensure the safety of the connection.

[0021] The locknut's structural design makes maintenance and replacement relatively simple. When the nut needs to be inspected or replaced, the combined first and second bodies can be disassembled using conventional tools, eliminating the need for complex manipulation or specialized tools. Furthermore, its clear structure allows for easy inspection of the nut and bolt during maintenance, allowing potential issues to be identified and addressed promptly.

[0022] Compared with the eccentric anti-loosening nut in the prior art, this anti-loosening nut has changed the traditional eccentric structural mode through the unique second body design. In the prior art, the eccentric design of the threaded hole of the nut or the use of multiple nuts for the threaded hole or the connector often requires more complicated processing technology and higher precision manufacturing requirements, which leads to increased costs. In the present invention, the second body is arranged in the give way groove of the threaded hole of the first body, and an effective anti-loosening function is achieved only by the design that the axis of the through hole and the axis of the threaded hole form an angle, which simplifies the structural design and reduces the processing difficulty and manufacturing cost. Due to the simplification of the structural design, the installation process also becomes simpler. Compared with the traditional eccentric anti-loosening nut, there is no need to precisely adjust the position of multiple eccentric components or complicated installation steps, which reduces installation time and labor costs. During equipment maintenance, its simple structure also makes it easier for maintenance personnel to operate, and the nuts can be quickly replaced or repaired, reducing the downtime and maintenance costs of the equipment.

[0023] Although the design of the second body has changed the traditional eccentric method, its anti-loosening performance is not inferior or even better. The angle setting between the axis of the through hole and the axis of the threaded hole can produce an anti-loosening force with the same function after the nut and bolt are tightened, effectively preventing the bolt from loosening. This design can more stably maintain the tightening state between the nut and the bolt when dealing with working conditions such as vibration and impact, thereby improving the reliability of the connection. By adjusting the angle between the axis of the through hole of the second body and the axis of the threaded hole, as well as the size and shape of the second body in the clearance groove and other parameters, it can adapt to different application requirements and has greater versatility. In comparison, the design of traditional eccentric anti-loosening nuts is relatively fixed and has a limited scope of application. This flexibility makes this anti-loosening nut more versatile.

[0024] The third body is pressed onto the second body, and the third body has a clamping portion, which is clamped into the clamping groove. The third body is made of the same or similar material as the first body to ensure the overall structural strength and stability. The shape and size of the clamping portion precisely match the clamping groove to ensure a firm clamping. When the third body is pressed onto the second body, it can further limit the movement of the second body and prevent it from being dislodged due to vibration or other external forces during use. At the same time, the third body can also protect the second body, reduce wear and damage to the second body caused by external factors, and extend the service life of the anti-loosening nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0026] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the utility model;

[0028] Figure 3 This is a structural diagram of Example 2 of the present utility model.

[0029] In the figure: first body-1, threaded hole-101, give way groove-102, conical accommodating groove-103, cylindrical accommodating groove-104, snap-fit ​​groove-105, snap-fit ​​section-106, guide groove-107, second body-2, through hole-201, conical part-202, cylindrical part-203, third body-3, snap-fit ​​part-301, pressing part-302. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0031] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0032] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] Example 1

[0035] Reference Figure 1~Figure 2 , which is the first embodiment of the utility model, proposes a lock nut, including a first body 1, the first body 1 has a threaded hole 101, the threaded hole 101 has a clearance groove 102 and a clamping groove 105, the second body 2 is arranged in the clearance groove 102, the second body 2 has a through hole 201, the axis of the through hole 201 is set at an angle to the axis of the threaded hole 101, the third body 3 is pressed on the second body 2, the third body 3 has a clamping portion 301, and the clamping portion 301 is clamped in the clamping groove 105.

[0036] In this embodiment, the first body 1 is a nut. The axis of the through hole 201 of the second body 2 is set at an angle to the axis of the threaded hole 101, so that when the bolt is subjected to vibration or external force, the second body 2 will generate a force in the opposite direction of the loosening of the bolt. This unique structure increases the friction between the nut and the bolt, forming a reliable anti-loosening mechanism, effectively preventing the nut from being loosened due to factors such as vibration and impact, and greatly improving the stability and reliability of the connection. The clearance groove 102 of the first body 1 is tightly matched with the second body 2 to ensure the stable installation of the second body 2 inside the nut. This structural design enables the entire anti-loosening nut to maintain the integrity of the overall structure when subjected to various loads and is not easily deformed or damaged. Even under large tensile, compressive or shear forces, the nut can reliably fix the bolt to ensure the safety of the connection.

[0037] The locknut's structural design makes maintenance and replacement relatively simple. When the nut needs to be inspected or replaced, the combined structure of the first and second bodies 1 and 2 can be disassembled using conventional tools, eliminating the need for complex manipulation or specialized tools. Furthermore, its clear structure allows for easy inspection of the nut and bolt during maintenance, allowing potential issues to be identified and addressed promptly.

[0038] Compared with the eccentric anti-loosening nut in the prior art, this anti-loosening nut has changed the traditional eccentric structural mode through the unique design of the second body 2. In the prior art, the eccentric design of the threaded hole 101 of the nut or the eccentric design of the threaded hole 101 or the connector by using multiple nuts often requires more complex processing technology and higher precision manufacturing requirements, which leads to increased costs. In the present invention, the second body 2 is arranged in the clearance groove 102 of the threaded hole 101 of the first body 1, and an effective anti-loosening function is achieved only by the design that the axis of its through hole 201 is at an angle to the axis of the threaded hole 101, which simplifies the structural design and reduces the processing difficulty and manufacturing cost. Due to the simplification of the structural design, the installation process also becomes simpler. Compared with the traditional eccentric anti-loosening nut, there is no need to precisely adjust the position of multiple eccentric components or complex installation steps, which reduces installation time and labor costs. During equipment maintenance, its simple structure also makes it easier for maintenance personnel to operate, and the nuts can be quickly replaced or repaired, reducing the downtime and maintenance costs of the equipment.

[0039] Although the design of the second body 2 has changed the traditional eccentric method, its anti-loosening performance is not inferior or even better. The angle between the axis of the through hole 201 and the axis of the threaded hole 101 is set so that after the nut and bolt are tightened, an anti-loosening force with the same function can be generated, effectively preventing the bolt from loosening. This design can more stably maintain the fastening state between the nut and the bolt when dealing with working conditions such as vibration and impact, thereby improving the reliability of the connection. By adjusting the angle between the axis of the through hole 201 of the second body 2 and the axis of the threaded hole 101, as well as the size and shape of the second body 2 in the clearance groove 102 and other parameters, it can adapt to different application requirements and has greater versatility. In contrast, the design of traditional eccentric anti-loosening nuts is relatively fixed and has a limited scope of application. This flexibility makes this anti-loosening nut more versatile.

[0040] The third body 3 is pressed onto the second body 2. The third body 3 has a clamping portion 301, which is clamped into the clamping groove 105. The third body 3 is made of the same or similar material as the first body 1 to ensure the overall structural strength and stability. The shape and size of the clamping portion 301 precisely match the clamping groove 105 to ensure a firm clamping. When the third body 3 is pressed onto the second body 2, it can further limit the movement of the second body 2 and prevent it from being dislodged from its original position due to vibration or other external forces during use. At the same time, the third body 3 can also protect the second body 2, reduce the wear and damage to the second body 2 caused by external factors, and extend the service life of the anti-loosening nut.

[0041] Furthermore, the third body 3 has a pressing portion 302 , which is pressed onto the second body 2 and is located on one side of the clamping portion 301 .

[0042] In this embodiment, the pressing portion 302 of the third body 3 is made of a material with a certain degree of elasticity and rigidity, such as specially treated alloy steel or high-strength plastic. The pressing portion 302 is typically annular or sheet-shaped and slightly larger than the corresponding portion of the second body 2 to ensure a tight fit on the second body 2.

[0043] When the third body is mounted on the first body 1, the pressing portion 302 is in full contact with the second body 2. By applying a certain amount of pressure, the friction between the second body 2 and the bolt is further enhanced, improving the anti-loosening effect. Simultaneously, the pressing portion 302 also acts as a buffer and shock absorber, reducing vibration and impact to the bolt during use, thereby extending the service life of the bolt and the locknut. Furthermore, the pressing portion 302 and the clamping portion 301 cooperate with each other to act on the second body 2, making the entire locknut structure more stable and reliable.

[0044] Furthermore, the clamping portion 301 is an elastic clamping portion, the clamping groove 105 has a clamping section 106 and a guide groove 107, the guide groove 107 leads to the clamping section 106, the clamping portion 301 is clamped and arranged in the clamping groove 105, and the guide groove 107 is used to guide the clamping portion 301 to slide into the clamping section 106.

[0045] In this embodiment, the clamping portion 301 is made of a material with excellent elasticity, such as spring steel or high-strength rubber. This elasticity allows the clamping portion 301 to deform within a certain range, allowing it to slide smoothly into the clamping slot 105. Once inserted into the clamping slot 105, the clamping portion 301 returns to its original shape, firmly locking into the clamping section 106, ensuring a secure and reliable connection between the third body and the first body. The clamping section 106 of the clamping slot 105 is designed as a groove that matches the shape of the clamping portion 301. Its size and depth are precisely calculated to ensure a stable clamping connection. The inner wall of the clamping section 106 typically has a certain degree of roughness, which increases friction with the clamping portion 301 and prevents the clamping portion 301 from accidentally dislodging. The guide groove 107 provides guidance for the clamping portion 301 as it slides into the clamping section 106. The width of the guide groove 107 is slightly larger than the maximum width of the clamping portion 301, and its length and inclination angle are designed according to actual installation requirements. When the third body is installed, the clamping portion 301 slides smoothly into the clamping section 106 along the guide groove 107 , which greatly improves the convenience and efficiency of installation.

[0046] According to a further technical solution, the third body is an annular concave gasket.

[0047] In this embodiment, the third body 3 is designed as an annular concave gasket, made of a high-strength, highly elastic metal material, such as spring steel or stainless steel. Its annular shape matches the outer shape of the first body 1, allowing it to fit tightly against the first body 1. The concave design ensures that the third body 3 is better fixed to the first body 1 after installation, preventing displacement.

[0048] The thickness of the annular concave gasket is precisely calculated to ensure sufficient strength to withstand the pressure of the bolts and external forces, while also avoiding excessive thickness that could lead to insufficient installation space. The depth and curvature of the concave gasket are also optimized based on actual needs to ensure a good fit with the second body 2 and achieve the best anti-loosening effect.

[0049] When installing the locknut, the annular concave gasket's engaging portion 301 engages with the engaging groove 105 of the first body 1, while the pressing portion 302 presses against the second body 2. During the tightening process, the annular concave gasket provides additional elastic pressure, enhancing the friction between the second body 2 and the bolt, while also preventing the second body 2 from dislodging from the clearance groove 102. This design makes the locknut more compact and stable, making it suitable for a variety of complex working environments.

[0050] According to a further technical solution, the second body has a conical portion and a cylindrical portion.

[0051] In this embodiment, the second body has a conical portion and a cylindrical portion. During the tightening process of the nut, the conical portion can play a guiding and positioning role. As the nut is screwed in, the bolt first contacts the conical portion. The conical portion will gradually deform and fit tightly to the surface of the bolt, generating a large friction force to prevent the nut from loosening. The cylindrical portion can provide stable support and further friction enhancement. This structural design enables the nut to effectively resist loosening at different stages. Especially when subjected to vibration and impact loads, the synergistic effect of the conical portion and the cylindrical portion can better maintain the tightening state between the nut and the bolt, thereby improving the anti-loosening performance. When the conical portion and the cylindrical portion are both located in the give way groove, the second body can provide a stable oblique force to the first body, further enhancing the anti-loosening effect of the anti-loosening nut.

[0052] The combination of the conical and cylindrical sections increases the structural strength of the second body. When subjected to load, the conical section distributes some of the force to the cylindrical section, which in turn provides a solid support base, enabling the entire second body to better withstand the pressure, tension, and shear forces from the bolt and nut. This enhanced structural stability helps maintain the overall structural integrity of the nut, preventing deformation or damage to the second body during use, thereby ensuring the long-term effectiveness of the anti-loosening function. The conical and cylindrical sections effectively distribute loads, reducing local stress concentrations and minimizing material fatigue and damage caused by long-term stress. This extends the service life of the anti-loosening nut.

[0053] As a further technical solution, the relief groove has a conical accommodating groove and a columnar accommodating groove, and the conical accommodating groove is used to accommodate the conical portion.

[0054] In this embodiment, the design of the tapered receiving groove and the tapered portion achieves a precise fit between them. During assembly of the anti-loosening nut, the tapered portion fits accurately into the tapered receiving groove, ensuring that the second body is precisely and stably positioned within the first body. This precise fit not only enhances the stability of the nut's overall structure but also ensures that the second body will not shift or loosen due to external forces during use, thus laying a solid foundation for the effective anti-loosening function.

[0055] When the nut is tightened, the tapered portion is squeezed within the tapered groove, generating a radial clamping force. This clamping force significantly increases the friction between the tapered portion, the bolt surface, and the wall of the tapered groove. This friction effectively prevents relative rotation between the bolt and nut under vibration or impact loads, significantly improving the reliability of preventing loosening.

[0056] The tapered receiving groove optimizes the force transmission path. When the nut is subjected to external loads, the force is transferred through the tapered portion to the tapered receiving groove, where it is evenly distributed across the first body. This optimal force distribution mechanism reduces stress concentration, reduces the likelihood of damage to the nut due to localized excessive force, and extends the nut's service life.

[0057] This recessed design simplifies the installation and removal of the second body. During installation, the operator simply aligns the tapered portion of the second body with the tapered receiving groove and gently presses or rotates it. For removal, the reverse operation is performed to easily remove the second body. This convenient operation improves assembly efficiency and reduces labor costs, saving significant time, especially during large-scale production or equipment maintenance.

[0058] As a further technical solution, the angle between the axis of the through hole and the axis of the clearance groove is 2°.

[0059] In this embodiment, the angle between the axis of the through-hole and the axis of the clearance slot is set at 2°. When the nut and bolt are tightened, the second body generates a specific anti-loosening force of specific direction and magnitude. This angle design allows the anti-loosening force to be more effectively distributed across the contact surface between the bolt and nut, enhancing the ability to resist bolt loosening. Compared to traditional nuts, this special angle design can better withstand external forces such as vibration and impact, preventing the bolt from loosening under various operating conditions, thereby improving the reliability and stability of the connection. The 2° angle design not only enhances the anti-loosening effect, but also takes into account the convenience of installation. This angle does not make the nut installation too difficult, and the operator can still use conventional tools to easily tighten the nut to the appropriate torque. Furthermore, during the tightening process, this angle promotes moderate friction between the bolt and nut, ensuring smooth installation while providing sufficient anti-loosening friction to prevent the nut from loosening after installation. This helps the nut maintain the stability of the overall structure when subjected to various loads. Over long-term use, this reduces component wear and deformation caused by bolt loosening, extending the service life of the nut and bolt. At the same time, a stable connection structure also helps to improve the durability of the entire equipment or structure, and reduces the repair and replacement costs caused by damage to the connector.

[0060] As a further technical solution, the height of the cylindrical receiving groove and the cylindrical portion 203 is not less than 1 / 3 of the height of the first main body axis.

[0061] In this embodiment, the height of the cylindrical receiving groove and cylindrical portion 203 is no less than one-third of the height of the first body's axis, providing sufficient support height for the second body within the first body. This design allows the second body to remain more stably in its correct position when the nut is subjected to various loads, making it less likely to tilt or shift. When subjected to tension, compression, or shear forces, the tight fit between the cylindrical receiving groove and cylindrical portion 203 effectively transmits and distributes the load, enhancing the stability of the entire locknut structure and ensuring a consistently secure connection between the nut and bolt.

[0062] The sufficient height of the cylindrical structure helps optimize the interaction between the second body and the bolt. During the nut tightening process, the fit of the cylindrical portion 203 within the cylindrical receiving groove effectively controls the deformation and clamping force of the second body. When the nut is subjected to vibration or impact, the cylindrical portion 203 can more stably resist external forces, maintaining a tight grip on the bolt and enhancing the anti-loosening effect.

[0063] As a further technical solution, the second body is a notch-type elastic ring gasket.

[0064] In this embodiment, when the second body is designed as a notched elastic ring gasket, it exhibits excellent elastic deformation properties. During the tightening process of the nut and bolt, the notch allows the elastic ring gasket to more easily deform elastically, thereby better adapting to the fit between the bolt and nut. This elastic deformation allows the gasket to fit tightly against the contact surface of the bolt and nut, increasing friction and further enhancing the anti-loosening effect.

[0065] The notched elastic ring gasket's structure makes installation and removal much easier. During installation, simply place the gasket in the clearance groove of the first body and twist the first body. Due to its elasticity, the gasket easily adapts to the insertion of the bolt and the tightening of the nut. During removal, it is also easier to remove due to overtightening, reducing the requirements for tools and operators.

[0066] Because the elastic ring washer cushions friction and impact between the bolt and nut, it reduces wear during direct contact. Over long-term use, this helps maintain the thread integrity of the bolt and nut, reduces the risk of nut loosening due to thread wear, and improves the reliability and durability of the connection. Locknuts with a notched elastic ring washer as the second body offer cost advantages. Their processing is relatively simple, requiring no complex manufacturing equipment or techniques. This reduces the overall manufacturing cost of the locknut, resulting in significant savings in large-scale production.

[0067] As a further technical solution, the annular deflection angle of the second body is 2° along the axial direction of the through hole.

[0068] In this embodiment, the annular deflection angle of the second body is set at 2° along the axial direction of the through-hole. During the tightening process of the nut and bolt, the second body generates a deflection force of a specific direction and magnitude. This deflection force interacts with the axial force of the bolt to precisely adjust the direction of the anti-loosening force, effectively resisting the tendency of the bolt to loosen due to external forces such as vibration and impact. Compared with conventional nuts, this precisely controlled anti-loosening force direction can more effectively prevent the bolt from backing out and loosening under various complex working conditions, greatly improving the reliability and stability of the connection.

[0069] Example 2

[0070] Reference Figure 3 , which is the second embodiment of the present utility model, is different from the first embodiment in that:

[0071] Compared with Example 1, further, the second body is an annular gasket, and the angle between the axis of the through hole and the axis of the threaded hole is 3°~5°.

[0072] In this embodiment, the second body is an annular gasket and the angle between the axis of the through hole and the axis of the threaded hole is in the range of 3°-5°. During the tightening process of the nut and the bolt, the annular gasket will produce a unique anti-loosening effect due to this angle. This angle causes the annular gasket to produce a certain deformation and displacement in the radial direction when it is subjected to the pressure of the bolt, thereby forming a friction force in the opposite direction of the loosening between the bolt and the nut. This friction force can effectively resist the loosening of the bolts caused by external forces such as vibration and impact, and its anti-loosening performance is significantly improved compared to traditional nuts. In industrial equipment, such as motors, fans and other equipment with large vibrations, the use of this anti-loosening nut can greatly reduce the risk of nut loosening, ensure the stable operation of the equipment, and reduce equipment failures and downtime caused by nut loosening. Compared with notched annular gaskets, production costs are further reduced.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A lock nut, characterized in that: include A first main body (1), wherein the first main body (1) has a threaded hole (101), and the threaded hole (101) has a clearance groove (102) and a clamping groove (105). A second body (2), the second body (2) is arranged in the clearance groove (102), the second body (2) has a through hole (201), the axis of the through hole (201) is arranged at an angle to the axis of the threaded hole (101), A third main body (3), the third main body (3) is pressed onto the second main body (2), the third main body (3) has a clamping portion (301), and the clamping portion (301) is clamped in the clamping groove (105).

2. A lock nut according to claim 1, characterized in that: The third body (3) has a pressing portion (302), the pressing portion (302) is pressed onto the second body (2), and the pressing portion (302) is located on one side of the clamping portion (301).

3. The anti-loosening nut according to claim 1, characterized in that: The clamping portion (301) is an elastic clamping portion, the clamping groove (105) has a clamping section (106) and a guide groove (107), the guide groove (107) leads to the clamping section (106), the clamping portion (301) is clamped and arranged in the clamping groove (105), and the guide groove (107) is used to guide the clamping portion (301) to slide into the clamping section (106).

4. The anti-loosening nut according to claim 1, characterized in that: The third body (3) is an annular concave gasket.

5. The anti-loosening nut according to claim 1, characterized in that: The second main body (2) has a conical portion (202) and a cylindrical portion (203), the relief groove (102) has a conical accommodating groove (103) and a cylindrical accommodating groove (104), and the conical accommodating groove (103) is used to accommodate the conical portion (202).

6. The anti-loosening nut according to claim 5, characterized in that: The angle between the axis of the through hole (201) and the axis of the clearance groove (102) is 2°.

7. The anti-loosening nut according to claim 6, characterized in that: The height of the columnar accommodating groove (104) and the columnar portion (203) is not less than 1 / 3 of the height of the axis of the first main body (1).

8. The anti-loosening nut according to claim 1, characterized in that: The second main body (2) is a notched elastic ring gasket.

9. The anti-loosening nut according to claim 7, characterized in that: The annular deflection angle of the second body (2) is 2° along the axial direction of the through hole (201).

10. The anti-loosening nut according to claim 9, characterized in that: The second body (2) is an annular gasket, and the angle between the axis of the through hole (201) and the axis of the threaded hole (101) is 3° to 5°.

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