Lock nut structure and mechanical equipment

Abstract

The utility model relates to a locknut structure and mechanical equipment, the locknut structure comprises a screw rod, a first nut and a second nut, the first nut and the second nut are screwed on the screw rod at the same time, the first nut and the second nut are clamped and matched, and a workpiece sleeving the screw rod is clamped between the first nut and the head of the screw rod. The first nut comprises a first end and a second end which are opposite, the first end is close to the head of the screw, the second end is close to the second nut, the first nut is provided with at least one separation groove to separate a main body part and a locking plate, the locking plate is used for abutting against a workpiece, and the separation groove extends from the first end to the second end. According to the lock nut structure, when the first nut has the tendency of rotating in the opposite direction, the locking plate can conduct barb scratching on the surface of the workpiece, and the anti-loosening effect is achieved. The relative positions and friction between the first nut and the second nut can also increase the locking effect, and the first nut and the second nut abut against each other during locking, so that the friction force is increased.

Description

Technical Field

[0001] This application relates to the field of nut technology, and more particularly to an anti-loosening nut structure and mechanical device. Background Technology

[0002] Bolt and nut assemblies, as fasteners, have a wide range of applications. For fasteners subjected to long-term impact, vibration, and variable load conditions, preventing loosening of the nut is particularly important. Current technologies typically achieve this by increasing the friction between the nut and the workpiece to be locked, or by increasing the clamping force between the bolt and nut. However, increasing friction leads to increased clamping and preload forces on the workpiece, affecting its performance; increasing or decreasing clamping force results in decreased toughness, impact resistance, and load-bearing capacity of the bolt and nut.

[0003] Therefore, there is an urgent need to design a type of anti-loosening nut that can prevent loosening without causing excessive tightening force and preload on the workpiece. Utility Model Content

[0004] This application provides an anti-loosening nut structure to solve the problem of bolt loosening of workpieces caused by long-term vibration during assembly line operations.

[0005] In a first aspect, this application proposes an anti-loosening nut structure, including a screw rod, a first nut, and a second nut. The first nut and the second nut are simultaneously screwed onto the screw rod and are engaged with each other. The first nut and the head of the screw rod are used to clamp a workpiece sleeved on the screw rod. The first nut includes a first end and a second end opposite to each other. The first end is close to the head of the screw rod, and the second end is close to the second nut. The first nut is provided with at least one dividing groove to separate the main body and the locking piece. The locking piece is used to press against the workpiece. The dividing groove extends from the first end to the second end.

[0006] According to the anti-loosening nut structure of this application, the first nut is provided with a plurality of partition grooves along the circumferential direction, and the partition grooves gradually slope from the first end to the second end.

[0007] Optionally, all of the plurality of the dividing grooves are inclined in the same direction from the first end to the second end.

[0008] Optionally, the dividing groove defines an opening at the first end, and the included angles formed by the plurality of openings and the radial direction of the first nut are all the same.

[0009] According to the anti-loosening nut structure of this application, the thickness of the locking piece gradually increases from the first end towards the second end.

[0010] According to the anti-loosening nut structure of this application, the second end of the first nut is provided with a conical part, which gradually shrinks in the direction of gradually moving away from the first end, and the second nut is provided with a conical hole that engages with the conical part.

[0011] Optionally, the inner wall surface of the conical hole and the outer wall surface of the vertebral body are fitted together and are both integrally formed smooth arc surfaces.

[0012] Optionally, the bottom end of the conical hole is provided with a stop portion, and the top end of the vertebral body is fitted with the stop portion.

[0013] Optionally, the cone-shaped portion and the first nut are integrally formed.

[0014] Secondly, this application proposes a mechanical device including a workpiece and an anti-loosening nut structure as described above.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art:

[0016] The anti-loosening nut structure provided in this application embodiment has a first nut and a second nut screwed onto a screw. Since the first nut has at least one dividing groove to separate the main body and the locking plate, the dividing groove provides space for the locking plate to deform under force. This means that the tighter the first nut is tightened, the more the workpiece is compressed and expands, resulting in tension force. The first nut is compressed by the workpiece, and in the extension direction of the screw, the locking plate is compressed, reducing the distance between it and the main body. The gap between some of the threads of the first nut becomes smaller, and the first nut grips the screw threads more tightly. Furthermore, the space provided by the dividing groove allows the locking plate to impart elasticity to the first nut, absorbing vibration energy and producing an anti-loosening effect. When the locking plate is tightened, it can better adapt to the shape and surface condition of the workpiece, ensuring full contact and effectively resisting displacement caused by vibration. When the first nut tends to rotate in the opposite direction due to vibration, the locking plate will hook and scrape against the surface of the workpiece, also producing an anti-loosening effect. Furthermore, the relative position of the first and second nuts and the friction between them also increase the locking effect. The first and second nuts abut against each other during locking, increasing the total contact area and thus improving friction. In addition, since the first nut is locked to the workpiece, the force is evenly transmitted to the workpiece through it, enhancing the uniform distribution of stress. Moreover, the locking plate gives the first nut a certain degree of elasticity or plastic deformation capability, which can buffer and absorb some stress during vibration, further reducing localized stress concentration. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0018] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 A front view of an anti-loosening nut structure provided in an embodiment of this application;

[0021] Figure 2 A cross-sectional view of an anti-loosening nut structure provided in an embodiment of this application;

[0022] Figure 3 A perspective view of a first nut for an anti-loosening nut structure provided in an embodiment of this application;

[0023] Figure 4 A bottom view of the first nut of an anti-loosening nut structure provided in an embodiment of this application;

[0024] Figure 5 A side view of the first nut of an anti-loosening nut structure provided in an embodiment of this application;

[0025] Figure 6 This is a perspective view of a second nut in an anti-loosening nut structure provided in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] Screw 10, head 11, first nut 20, partition groove 21, opening 211, main body 22, first threaded hole 221, locking plate 23, cone body 24, second nut 30, tapered hole 31, second threaded hole 32, stop 33, workpiece 2. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0030] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0031] like Figure 1 and Figure 2 As shown, the anti-loosening nut structure according to an embodiment of this application includes a screw 10, a first nut 20, and a second nut 30. The first nut 20 and the second nut 30 are simultaneously screwed onto the screw 10 and are engaged with each other. The first nut 20 and the head 11 of the screw 10 are used to clamp the workpiece 2 sleeved on the screw 10. The first nut 20 includes a first end and a second end opposite to each other. The first end is close to the head 11 of the screw 10, and the second end is close to the second nut 30. The first nut 20 is provided with at least one partition groove 21 to separate the main body 22 and the locking piece 23. The locking piece 23 is used to press against the workpiece 2. The partition groove 21 extends from the first end to the second end.

[0032] The dividing groove 21 is located on the side of the first nut 20, extending from the first end to the second end to form a slot. The depth and width of this slot need to be designed according to the thickness of the locking piece 23 and the strength of the main body 22 to ensure that the locking piece 23 will not be damaged under force. The shape of the dividing groove 21 can be straight, curved, or other suitable geometric shapes to optimize the movement trajectory and pressing effect of the locking piece 23. At least one dividing groove 21 means that in some embodiments, the first nut 20 has one dividing groove 21, one locking piece 23, and one main body 22; in some embodiments, the first nut 20 has multiple dividing grooves 21, multiple locking pieces 23, and one main body 22. In the above embodiments, the number of dividing grooves 21 corresponds one-to-one with the number of locking pieces 23.

[0033] The locking plate 23 is the movable part of the first nut 20. Its thickness and material should have sufficient strength and toughness to withstand the pressure generated when clamping the workpiece 2.

[0034] The main body 22 is the main load-bearing part of the first nut 20. The internal thread on the main body 22 and the external thread on the screw 10 are matched to ensure that the first nut 20 can be stably connected to the screw 10 when rotating.

[0035] In detail, the first nut 20 and the second nut 30 are screwed onto the screw 10. The first nut 20 has a first threaded hole 221, and the second nut 30 has a second threaded hole 32. The screw 10 is screwed into the first threaded hole 221 and the second threaded hole 32. Since the first nut 20 is provided with at least one partition groove 21 to separate the main body 22 and the locking piece 23, the partition groove 21 provides space for the locking piece 23 to deform under force. As the first nut 20 is tightened, the workpiece 2 is compressed and expanded, resulting in tension force. The first nut 20 is compressed by the workpiece 2, and the locking piece 23 is compressed in the extension direction of the screw 10. The pressure reduces the distance between the first nut 20 and the main body 22, making the gap between some of the threads of the first nut 20 smaller. This allows the first nut 20 to grip the threads of the screw 10 more tightly. The space provided by the partition groove 21 allows the locking plate 23 to provide the first nut 20 with elastic properties, absorbing vibration energy and preventing loosening. Furthermore, the locking plate 23 can better adapt to the shape and surface of the workpiece 2 during clamping, ensuring full contact and effectively resisting displacement caused by vibration. When the first nut 20 tends to rotate in the opposite direction due to vibration, the locking plate 23 will barb and scrape against the surface of the workpiece 2, also preventing loosening. In addition, the relative position of the first nut 20 and the second nut 30 and the friction between them also increase the locking effect. The first nut 20 and the second nut 30 abut against each other during locking, increasing the total contact area and thus improving friction. Furthermore, since the first nut 20 is locked onto the workpiece 2, the force is evenly transmitted to the workpiece 2 through the first nut 20, which enhances the uniform distribution of stress. Moreover, the locking plate 23 enables the first nut 20 to have a certain elastic or plastic deformation capability, thereby buffering and absorbing some stress during vibration, and further reducing local stress concentration.

[0036] The anti-loosening nut structure according to the embodiments of this application can effectively clamp the workpiece 2 and prevent loosening, thereby improving the reliability and safety of the overall connection.

[0037] like Figure 3 and Figure 5 As shown, according to the anti-loosening nut structure of this application embodiment, the first nut 20 is provided with a plurality of partition grooves 21 along the circumferential direction, and the partition grooves 21 gradually tilt in the direction from the first end to the second end.

[0038] In detail, the inclined partition groove 21 allows the end edge of the locking piece 23 to be made thinner to form a sharp point, giving the locking piece 23 a scraping effect; at the same time, the inclined partition groove 21 design can effectively disperse the force exerted on the first nut 20 by the workpiece 2 during vibration, reduce stress concentration, and reduce the risk of material fatigue and breakage. In addition, the multiple partition grooves 21 arranged circumferentially can increase the contact area between the locking piece 23 and the workpiece 2, and provide multiple contact points, thereby improving the stability of the connection, effectively dispersing the transmission of force, and enhancing the anti-loosening effect.

[0039] like Figure 5 As shown, in some embodiments, the plurality of partition grooves 21 are all inclined in the same direction from the first end to the second end.

[0040] In detail, the multiple partition grooves 21 are all inclined in the same direction from the first end to the second end, which can better form a self-locking mechanism for the workpiece 2. When the first nut 20 is subjected to a counter-rotating force, the tip of the locking piece 23 will press more tightly against the workpiece 2, forming a barb-like structure, increasing the friction with the workpiece 2, thereby further reducing the risk of loosening.

[0041] In some specific embodiments, all the partition grooves 21 are inclined at the same angle, which simplifies the manufacturing process, ensures that the locking plate 23 can distribute the pressure evenly when subjected to the pressure of the workpiece 2, and improves the stability of clamping the workpiece 2.

[0042] like Figure 4 As shown, in some embodiments, the partition groove 21 defines an opening 211 at the first end, and the included angles formed by the plurality of openings 211 and the radial direction of the first nut 20 are all the same.

[0043] Understandably, the fact that multiple openings 211 form the same angle with the radial direction allows the locking plate 23 to be evenly distributed when under force, avoiding deformation or damage caused by excessive local force, thereby extending the service life of the first nut 20 and the screw 10.

[0044] like Figure 5 As shown, in the anti-loosening nut structure according to the embodiment of this application, the thickness of the locking piece 23 gradually increases from the first end to the second end.

[0045] In the above embodiments, as the thickness of the locking plate 23 increases, greater pressure can be provided, which can effectively clamp the workpiece 2 and prevent the workpiece 2 from loosening during use. At the same time, the gradually increasing thickness can ensure that the locking plate 23 forms a barbed self-locking protection for the workpiece 2 while better bearing the pressure of the workpiece 2, with more uniform force distribution, reducing local stress concentration, thereby reducing the risk of material fatigue and breakage. Furthermore, the gradually thickened locking plate 23 can also make it easier for the locking plate 23 to press against and lock the workpiece 2, especially under long-term vibration conditions on the production line.

[0046] In some specific embodiments, the thickness of the locking piece 23 increases uniformly from the first end to the second end, which enables the locking piece 23 to provide a consistent clamping force and simplifies the manufacturing process.

[0047] like Figure 2 , Figure 5 as well as Figure 6 As shown, according to the anti-loosening nut structure of the present application embodiment, the second end of the first nut 20 is provided with a conical part 24, which gradually shrinks in the direction of gradually moving away from the first end, and the second nut 30 is provided with a conical hole 31 that engages with the conical part 24.

[0048] In detail, the conical portion 24, by engaging with the tapered hole 31 of the second nut 30, provides additional locking, preventing the first nut 20 from loosening due to vibrations during the movement of the workpiece 2 on the production line. Furthermore, the tapered design of the conical portion 24 helps provide better self-alignment between the first nut 20 and the second nut 30, ensuring better alignment during installation and guaranteeing the stability of the clamped workpiece 2. In addition, the conical portion 24 also helps the second nut 30 apply more pressure to the first nut 20, thereby enhancing the clamping effect on the workpiece 2.

[0049] The conical portion 24 has a circular, quadrilateral, hexagonal, or octagonal shape in its cross-section perpendicular to the axis of the screw 10. In some specific embodiments, the conical portion 24 can also be stepped, which can further increase the contact area between the first nut 20 and the second nut 30 and improve the anti-loosening performance of the anti-loosening nut structure.

[0050] like Figure 2 As shown, in some embodiments, the inner wall surface of the conical hole 31 and the outer wall surface of the vertebral body 24 are fitted together and are both integrally formed smooth arc surfaces.

[0051] In detail, by ensuring the inner wall of the conical hole 31 fits snugly against the outer wall of the cone portion 24, the gap between the first nut 20 and the second nut 30 is reduced, thereby improving the stability and reliability of the entire structure and effectively preventing loosening. Designing the inner wall of the conical hole 31 and the outer wall of the cone portion 24 as a single, smooth arc surface reduces friction between the contact surfaces, allowing the second nut 30 to rotate and move more smoothly when torque is applied. This helps reduce the force required for assembly and disassembly of the second nut 30 and the first nut 20, while also reducing wear. Secondly, the smooth arc surface design allows for a more uniform force distribution, effectively reducing local stress concentration and improving the overall load-bearing capacity and service life of the anti-loosening nut structure. Furthermore, the smooth arc surface design also ensures a more uniform force distribution between the first nut 20 and the second nut 30, effectively reducing local stress concentration and improving the overall load-bearing capacity and service life of the structure. It is understandable that the single-piece design not only improves the strength and rigidity of the first nut 20 and the second nut 30 but also simplifies the manufacturing process, reduces the complexity of the assembly process, and thus lowers production costs.

[0052] like Figure 2 As shown, in some embodiments, a stop portion 33 is provided at the bottom end of the conical hole 31, and the top end of the conical body 24 is in contact with the stop portion 33. Specifically, the contact between the conical body 24 and the stop portion 33 increases the contact area between the conical body 24 and the conical hole 31, effectively preventing the first nut 20 and the second nut 30 from loosening under vibration or impact, thereby improving the stability of the connection and making the first nut 20 and the second nut 30 less prone to loosening during use.

[0053] In some embodiments, the cone portion 24 and the first nut 20 are integrally formed.

[0054] In the above embodiments, the cone portion 24 and the first nut 20 are integrally formed, which eliminates the seams or weld points between the cone portion 24 and the first nut 20, enhances the overall structural strength, and reduces the risk of failure due to fatigue or fracture at the connection. Simultaneously, the integral forming of the cone portion 24 and the first nut 20 provides better positioning accuracy, ensuring stable clamping between the locking plate 23 and the workpiece 2 and preventing the workpiece 2 from loosening. It is understood that the integral forming of the cone portion 24 and the first nut 20 also simplifies the assembly process, reduces the number and complexity of parts, and lowers production and assembly costs.

[0055] The mechanical device according to the embodiments of this application includes a workpiece 2 and an anti-loosening nut structure as described above.

[0056] The mechanical device according to the embodiments of this application can effectively clamp the workpiece 2 and prevent it from loosening, thereby improving the reliability and safety of the overall connection.

[0057] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0058] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0059] The above are merely specific embodiments of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A structure for preventing loosening of nuts, characterized in that, The assembly includes a screw (10), a first nut (20), and a second nut (30). The first nut (20) and the second nut (30) are screwed onto the screw (10) and are engaged with each other. The first nut (20) and the head (11) of the screw (10) are used to clamp the workpiece (2) sleeved on the screw (10). The first nut (20) includes a first end and a second end, with the first end close to the head (11) of the screw (10) and the second end close to the second nut (30). The first nut (20) is provided with at least one partition groove (21) to separate the main body (22) and the locking piece (23). The locking piece (23) is used to press against the workpiece (2). The partition groove (21) extends from the first end to the second end.

2. The anti-loosening nut structure according to claim 1, characterized in that, The first nut (20) is provided with a plurality of partition grooves (21) in the circumferential direction, and the partition grooves (21) are gradually inclined in the direction from the first end to the second end.

3. The anti-loosening nut structure according to claim 2, characterized in that, The plurality of the partition grooves (21) are all inclined in the same direction from the first end to the second end.

4. The anti-loosening nut structure according to claim 3, characterized in that, The partition groove (21) defines an opening (211) at the first end, and the included angles formed by the plurality of openings (211) and the radial direction of the first nut (20) are all the same.

5. The anti-loosening nut structure according to any one of claims 1-4, characterized in that, The thickness of the locking piece (23) gradually increases from the first end toward the second end.

6. The anti-loosening nut structure according to claim 1, characterized in that, The second end of the first nut (20) is provided with a cone-shaped part (24). The cone-shaped part (24) gradually shrinks in the direction that gradually moves away from the first end. The second nut (30) is provided with a cone-shaped hole (31) that engages with the cone-shaped part (24).

7. The anti-loosening nut structure according to claim 6, characterized in that, The inner wall surface of the conical hole (31) and the outer wall surface of the vertebral body (24) are fitted together and are both integrally formed smooth arc surfaces.

8. The anti-loosening nut structure according to claim 7, characterized in that, The bottom end of the cone hole (31) is provided with a stop (33), and the top end of the cone body (24) is in contact with the stop (33).

9. The anti-loosening nut structure according to claim 6, characterized in that, The vertebral body (24) and the first nut (20) are integrally formed.

10. A mechanical device, characterized in that, Includes workpiece (2) and the anti-loosening nut structure as described in any one of claims 1-9.

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