Anti-loosening device applied to threaded connection and threaded connection structure

Abstract

This application discloses an anti-loosening device and a threaded connection structure for use in threaded connections. The anti-loosening device involves sequentially placing a first washer and a second washer between the connected component and the nut. An anti-loosening structure is provided on the first side of the first washer and the second side of the second washer. A deformation structure is provided on the first side and / or the second side. If the nut becomes loose after the threaded connection is installed, the resistance between the first washer and the second washer is less than the resistance between the first washer and / or the second washer and the threaded connection. The nut causes the second washer to rotate relative to the first washer in a third direction. The anti-loosening structure causes the second washer to move away from the first washer in a first direction. During this process, the second washer can push the nut to apply tension to the bolt, thereby compensating for the loss of preload in the threaded connection caused by the loosening of the nut, and thus achieving the effect of preventing loosening.

Description

Technical Field

[0001] This application relates to the field of threaded connection technology, and in particular to an anti-loosening device and a threaded connection structure applied to threaded connections. Background Technology

[0002] In the mechanical and engineering fields, threaded connections are a fundamental type of connection widely used in various equipment, pipelines, and mechanical components. However, with the increasing complexity of equipment operating environments, especially in the face of external factors such as vibration, impact, and temperature changes, the stability of threaded connections has become increasingly prominent. After prolonged use, particularly under vibration loads, traditional threaded connections often experience a decrease in preload, and may even loosen or slip out. This not only affects the normal operation of equipment but may even lead to safety accidents. Summary of the Invention

[0003] This application discloses an anti-loosening device for threaded connections, which can enhance the reliability of bolted connections. In addition, this application also discloses a threaded connection structure.

[0004] To achieve the above objectives, in a first aspect, embodiments of this application disclose an anti-loosening device for threaded connections, comprising:

[0005] A first gasket, the first gasket including a first side;

[0006] The second gasket includes a second side, and the second side is disposed opposite to the first side;

[0007] An anti-loosening structure is provided on the first side and the second side. When the anti-loosening structure is configured in a first state, it locks the second gasket relative to the first gasket. In a second state, it causes the second gasket to move away from the first gasket in a first direction.

[0008] A deformation structure is disposed on the first side and / or the second side, wherein the deformation structure is configured to elastically deform along a second direction or a third direction in the first state, and to recover deformation along a third direction or the second direction in the second state.

[0009] Wherein, the first state is that the second pad rotates relative to the first pad in a third direction, and the second state is that the second pad rotates relative to the first pad in a second direction;

[0010] Wherein, the first direction is the axial direction of the first gasket, the second direction is the circumferential direction of the first gasket and is the same as the tightening direction of the threaded connection, and the third direction is the circumferential direction of the first gasket and is opposite to the second direction;

[0011] In the second state, the resistance between the first gasket and the second gasket is less than the resistance between the first gasket and / or the second gasket and the threaded connection.

[0012] As an optional implementation, the anti-loosening structure includes a first surface, which is inclined, the inclination direction of the first surface corresponds to the helix angle of the threaded connection, and the inclination angle of the first surface is greater than the helix angle of the threaded connection. The first surface located on the first side slides in engagement with the first surface located on the second side.

[0013] As an optional implementation, the anti-loosening structure further includes a second surface, which is connected to the first surface;

[0014] The first surface is provided with a clearance portion, which is provided corresponding to the second surface. The portion of the anti-loosening structure located between the clearance portion and the second surface forms the deformation structure.

[0015] As an optional implementation, a compensation structure is also included, which is connected to the deformation structure and disposed opposite to the clearance portion. The compensation structure is used to increase the degree of elastic deformation of the deformation structure.

[0016] As an optional implementation, the angle between the extension direction of the clearance portion and the second surface is greater than or equal to 0° and less than 90°.

[0017] As an optional implementation, the clearance portion is a blind groove, and the bottom of the side wall of the clearance portion is provided with a hollow portion, which extends from the side wall of the clearance portion to the second surface. The hollow portion is used to adjust the stiffness of the deformable structure.

[0018] As an optional implementation, the first gasket further includes a third side, and the second gasket further includes a fourth side, the third side being disposed opposite to the first side, and the fourth side being disposed opposite to the second side; the third side and the fourth side include contact surfaces, the contact surfaces including a first region and a second region alternately disposed along the second direction, the first region being provided with a fixing structure, the fixing structure being used to fix the first gasket to the threaded connection, and / or fix the second gasket to the threaded connection;

[0019] The surface of the second region is rough.

[0020] Wherein, the area of ​​the first region is greater than or equal to the area of ​​the second region, or the area of ​​the first region is less than the area of ​​the second region.

[0021] As an optional implementation, the fixing structure is a fixing groove, the fixing structure includes a bottom surface, the bottom surface is inclined along the second direction, and the bottom surface extends from the bottom of the fixing groove to the top of the fixing groove.

[0022] As an optional implementation, a lubricating medium is provided between the first side and the second side.

[0023] Secondly, this application also discloses a threaded connection structure, including:

[0024] The nut, bolt, connected component one, and anti-loosening device for threaded connection as described in any of the above embodiments, wherein the first side abuts against the connected component one, the second side abuts against the nut, the bolt passes through the connected component one, the first washer, and the second washer in sequence, and the nut is connected to the bolt;

[0025] Alternatively, it may include a screw, a second connected component, and an anti-loosening device for threaded connections as described in any of the above embodiments, wherein the second connected component is provided with a threaded hole, the first washer and the second washer are provided corresponding to the threaded hole, and the screw is sequentially passed through the second washer, the first washer, and the threaded hole.

[0026] Compared with the prior art, the beneficial effects of this application are:

[0027] The anti-loosening device for threaded connections disclosed in this application involves sequentially placing a first washer and a second washer between the connected component and the nut. Anti-loosening structures are provided on a first side of the first washer and a second side of the second washer. Deformation structures are also provided on the first and / or second sides. If the nut becomes loose after the threaded connection is installed, the resistance between the first and second washers is less than the resistance between the first and / or second washer and the threaded connection. The nut causes the second washer to rotate relative to the first washer in a third direction. The anti-loosening structure then causes the second washer to move away from the first washer in a first direction. During this process, the second washer can push the nut to apply tension to the bolt, thereby compensating for the loss of preload caused by the loosening of the nut, thus achieving the anti-loosening effect. Furthermore, when disassembling the bolted connection, the deformation structure, which underwent elastic deformation during installation, provides a torque to facilitate disassembly of the threaded connection, thereby reducing the difficulty of disassembling the threaded connection. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of a threaded connection structure provided in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 Explosion diagram of the anti-loosening device;

[0031] Figure 3 for Figure 2 A schematic diagram of the second gasket in the middle;

[0032] Figure 4 This is a bottom view of the second gasket in one embodiment;

[0033] Figure 5 for Figure 4 A cross-sectional view of the second gasket along the AA direction.

[0034] Explanation of reference numerals in the attached figures:

[0035] Anti-loosening device, 100; Nut, 201; Bolt, 202; Connected part, 203;

[0036] First gasket, 1; First side, 11; Oil groove, 111; Outer flange, 112; Inner flange, 113; Third side, 12;

[0037] Second gasket, 2; Second side, 21; Anti-loosening structure, 211; First surface, 2111; Second surface, 2112; Deformation structure, 212; Clearance part, 2121; Hollowed-out part, 2122; Compensation structure, 213; Fourth side, 22; Contact surface, 221; First area, 2211; Fixing structure, 2211a; Bottom surface, 2211aa; Second area, 2212;

[0038] First direction, Z; Second direction, X; Third direction, Y. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In this invention, the terms "upper," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may have other meanings besides indicating orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0041] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a direct connection, an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0042] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0043] In the mechanical and engineering fields, threaded connections are a fundamental type of connection widely used in various equipment, pipelines, and mechanical components. However, with the increasing complexity of equipment operating environments, especially in the face of external factors such as vibration, impact, and temperature changes, the stability of threaded connections has become increasingly prominent. After prolonged use, particularly under vibration loads, the preload between the bolt and nut in traditional threaded connections gradually decreases under vibration, leading to loosening. Furthermore, vibration causes minute relative displacements between the connected components, disrupting the original preload balance and causing a further reduction in preload. Under these conditions, threaded connections are prone to loosening and slippage, which not only affects the normal operation of equipment but may even lead to safety accidents.

[0044] Based on this, the present invention provides an anti-loosening device for threaded connections and a threaded connection structure. The anti-loosening device involves sequentially placing a first washer and a second washer between the connected component and the nut. Anti-loosening structures are provided on a first side of the first washer and a second side of the second washer. Deformation structures are provided on the first and / or second sides. If the nut becomes loose after the threaded connection is installed, the resistance between the first and second washers is less than the resistance between the first and / or second washers and the threaded connection. The nut causes the second washer to rotate relative to the first washer in a third direction. The anti-loosening structure causes the second washer to move away from the first washer in a first direction. During this process, the second washer can push the nut to apply tension to the bolt, thereby compensating for the loss of preload caused by the loosening of the nut, thus achieving the anti-loosening effect. Furthermore, when disassembling the bolted connection, the deformation structure, which undergoes elastic deformation during installation, provides a torque to facilitate disassembly of the threaded connection, thereby reducing the difficulty of disassembling the threaded connection.

[0045] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0046] Please see Figures 1 to 2 This application discloses an anti-loosening device and a threaded connection structure for use in threaded connections. The threaded connection structure includes a nut, a bolt, a first connected component, and the anti-loosening device. The anti-loosening device is disposed between the first connected component and the nut. The bolt passes through the first connected component and the anti-loosening device sequentially, and the nut is connected to the bolt. Alternatively, it includes a screw, a second connected component, and the anti-loosening device. The second connected component has a threaded hole, and the anti-loosening device is disposed corresponding to the threaded hole. The screw passes through the anti-loosening device and the threaded hole sequentially. For ease of understanding, the following description is based on the use of a common bolt 202 and nut 201 to form a threaded connection, and uses the first connected component as the connected component 203. Obviously, the same characteristics as described below also apply when using a screw and a second connected component.

[0047] Please refer to the following: Figures 1 to 3 Specifically, the anti-loosening device 100 includes a first gasket 1, a second gasket 2, an anti-loosening structure 211, and a deformation structure 212. The first gasket 1 includes a first side 11. The second gasket 2 includes a second side 21, which is disposed opposite to the first side 11. The anti-loosening structure 211 is disposed on the first side 11 and the second side 21. When configured in a first state, the anti-loosening structure 211 locks the second gasket 2 relative to the first gasket 1. In a second state, it causes the second gasket 2 to move away from the first gasket 1 along a first direction Z. The deformation structure 212 is disposed on the first side 11 and / or the second side 21. When configured in the first state, the deformation structure 212 elastically deforms along a second direction X or a third direction Y. In the second state, it recovers its deformation along a third direction Y or a second direction X.

[0048] In the first state, the second washer 2 rotates relative to the first washer 1 along a third direction Y. In the second state, the second washer 2 rotates relative to the first washer 1 along a second direction X. The first direction Z is the axial direction of the first washer 1, the second direction X is the circumferential direction of the first washer 1 and is the same as the tightening direction of the threaded connection, and the third direction Y is the circumferential direction of the first washer 1 and is opposite to the second direction X. In the second state, the resistance between the first washer 1 and the second washer 2 is less than the resistance between the first washer 1 and / or the second washer 2 and the threaded connection.

[0049] In this embodiment, the anti-loosening device 100 is used by placing a first washer 1 and a second washer 2 sequentially between the connected component 203 and the nut 201, with the first side 11 and the second side 21 facing each other. The bolt 202 is sequentially inserted through the connected component 203, the first washer 1, and the second washer 2. After the nut 201 is screwed into the bolt 202, it abuts against the second washer 2. During the tightening of the threaded connection, the second washer 2 is driven by the nut 201 to rotate in the second direction X until the first washer 1 locks the second washer 2, preventing the second washer 2 from rotating further relative to the first washer 1 in the second direction X. At this time, the deformation structure 212 is compressed and undergoes elastic deformation in the direction corresponding to the tightening of the threaded connection. After the threaded connection is fully tightened, the resistance between the first washer 1 and the second washer 2 is less than the resistance between the first washer 1 and / or the second washer 2 and the threaded connection (obviously, the resistance between the first washer 1 and the second washer 2 here is the resistance when the second washer 2 rotates relative to the first washer 1 in the third direction Y). When the bolt 202 is loosened or removed, it will cause the second washer 2 to rotate in the third direction Y. At this time, when the anti-loosening device 100 is activated, the second washer 2 moves away from the first washer 1 in the first direction Z, thereby lifting the nut 201.

[0050] At this point, considering other components as ideal rigid bodies and only the stiffness of bolt 202 itself, let the preload of bolt 202 be F and the stiffness of bolt 202 be c. When nut 201 rotates Δθ in the loosening direction, the second washer 2 also rotates Δθ. For bolt 202, the deformation that occurs during this process (obviously elastic deformation, conforming to Hooke's law) has two sources: First, nut 201 loosens, causing bolt 202 to shorten by Δl_1. Assuming there is no anti-loosening device 100, this will be the actual deformation of bolt 202. In this case, the preload of bolt 202 becomes F_0 = F - cΔl_1; Second, the second washer 2 moves away from the first washer 1 along the first direction Z, thereby forcing nut 201 to elongate bolt 202, causing bolt 202 to lengthen by Δl_2. Then, after the nut 201 is rotated Δθ in the loosening direction, the preload of the bolt 202 is: F_1=F+cΔl_2-cΔl_1 (1)

[0052] Clearly, F_1 ​​> F_0. Therefore, the anti-loosening device 100 in this embodiment can at least reduce the attenuation of the preload of the bolt 202 after the nut 201 loosens, thereby achieving the anti-loosening function.

[0053] By configuring the anti-loosening structure 211 in a specific form, Δl_2 can be made greater than Δl_1. In this case, F_1>F, meaning that when the nut 201 rotates Δθ in the loosening direction, the preload of the bolt 202 is actually increased, which greatly improves the anti-loosening performance of the anti-loosening device 100. However, at the same time, during the disassembly of the threaded connection, the maximum preload will rise to F_1, making disassembly difficult. When disassembling the threaded connection, the required torque T depends on the frictional force generated by the preload F. Obviously, the larger the preload F and the larger the coefficient of friction, the larger the required torque T. The elastic force generated by the deformation of the deformation structure 212 can provide a torque in the same direction as the torque T, assisting in the disassembly of the threaded connection. Specifically, for the threaded connection with the anti-loosening device 100 of this embodiment, the maximum torque required for disassembly is:

[0054] T_max=f(F_1,μ)-T_0 (2)

[0056] Where μ is the coefficient of friction and T_0 is the torque generated by the deformation structure 212. It can be seen that the deformation structure 212 reduces the maximum torque required to disassemble the threaded connection, thus making the threaded connection easier to disassemble.

[0057] For example, the aforementioned anti-loosening structure 211 may be a pair of threaded pairs, staggered arc-shaped protrusions along the second direction X, etc.; the aforementioned deformation structure 212 may be a single metal spring, or a structure prefabricated in the first washer 1 and / or the second washer 2, etc. Several anti-loosening structures 211 and deformation structures 212 will be selected for detailed description below, and will not be repeated here. Optionally, the anti-loosening structure 211 includes a first surface 2111, which is inclined. The inclination direction of the first surface 2111 corresponds to the helix angle of the threaded connection, and the inclination angle of the first surface 2111 is greater than the helix angle of the threaded connection. The first surface 2111 located on the first side 11 slides in engagement with the first surface 2111 located on the second side 21.

[0058] Based on the foregoing reasoning, let the mean diameter of bolt 202 be d, the helix angle be α, and the inclination angle of the first face 2111 be β. As mentioned above, 0 < α < β < π / 2. Substituting into equation (1) and rearranging, we get: F_1 = F + cdΔθ(tanβ - tanα) / 2 (3)

[0060] Clearly, all terms in the above formula are positive values. That is, under the action of the anti-loosening device 100 in this embodiment, a slight rotation of the nut 201 in the direction of loosening the threaded connection will actually lead to an increase in the preload. It can be seen that the anti-loosening device 100 in this embodiment can achieve the function of preventing the threaded connection performance from deteriorating. In practice, the same conclusion can be obtained even if the stiffness of the connected part 203, the first washer 11, the second washer 22, or the nut 201 is considered.

[0061] Optionally, the first gasket 1 further includes a third side 12, and the second gasket 2 further includes a fourth side 22. The third side 12 is disposed opposite to the first side 11, and the fourth side 22 is disposed opposite to the second side 21. The third side 12 and the fourth side 22 include a contact surface 221. The contact surface 221 includes a first region 2211 and a second region 2212 alternately disposed along the second direction X. The first region 2211 is provided with a fixing structure 2211a, which is used to fix the first gasket 1 to the threaded connection, and / or fix the second gasket 2 to the threaded connection. The surface of the second region 2212 is a rough surface. The area of ​​the first region 2211 is greater than or equal to the area of ​​the second region 2212, or the area of ​​the first region 2211 is less than the area of ​​the second region 2212. As mentioned above, to achieve the anti-loosening function of the anti-loosening device 100 in this embodiment, the resistance between the first washer 1 and the second washer 2 needs to be less than the resistance between the first washer 1 and / or the second washer 2 and the threaded connection. A fixing structure 2211a is set to fix the first washer 11 relative to the connected part 203, and the second fixing structure 2211a is set to fix the second washer 22 relative to the nut 201. Since the fixing structure 2211a is prefabricated on the anti-loosening device 100, no additional operation is required on the construction site, which helps to simplify the on-site construction process and reduce the labor intensity of the operators.

[0062] For example, the fixing structure 2211a can be a ratchet or spike structure, or a barbed structure. During use, as the nut 201 is tightened, the fixing structure 2211a will embed into the surface of the connected component 203, thereby fixing the first washer 1 relative to the connected component 203 and the second washer 2 relative to the nut 201. It should be noted that when the fixing structure 2211a is a structure such as a ratchet, spike, or barbed structure that is destructive to the surface of the connected component 203 or the nut 201, the hardness of the surface of the first washer 1 needs to be greater than the hardness of the surface of the connected component 203, and the hardness of the surface of the second washer 2 needs to be greater than the hardness of the nut 201.

[0063] The ratchet, spike, or other spike structures described above are destructive to the surfaces of the connected component 203 and the bolt 202, leaving pits on their surfaces during installation. When priority needs to be given to the degree of damage to the connected component 203 and the nut 201 caused by the fixing structure 2211a, the area of ​​the first region 2211 can be made smaller than the area of ​​the second region 2212. When priority needs to be given to the fixing effect of the fixing structure 2211a, the area of ​​the first region 2211 can be made greater than or equal to the area of ​​the second region 2212. In practice, the specific needs should be considered comprehensively, which will not be elaborated here in this embodiment.

[0064] Optionally, the fixing structure 2211a is a fixing groove, which includes a bottom surface 2211aa. The bottom surface 2211aa is inclined along the second direction X and extends from the bottom of the fixing groove to the top of the fixing groove. In this embodiment, when the anti-loosening device 100 is in use, due to the pre-tightening force, the surfaces of the connected member 203 and the nut 201 are squeezed and embedded in the fixing structure 2211a. Since the inclination direction of the bottom surface 2211aa is opposite to the rotation direction of the threaded connection, it will not be affected by the fixing structure 2211a when the threaded connection is tightened. When the threaded connection is loosened, the parts of the connected member 203 and the nut 201 embedded in the fixing structure 2211a will not easily come out, thereby fixing the first washer 1 relative to the connected member 203 and the second washer 2 relative to the nut 201.

[0065] The ratchet, spike, or other structures mentioned above are destructive to the surfaces of the connected parts 203 and the bolts 202, leaving pits on their surfaces during installation. In cases where this threaded connection requires frequent disassembly and assembly, it cannot be guaranteed that the ratchet, spike, or other structures will enter the pits created in the previous installation each time. Especially after multiple disassemblies and assembly, pits left from different installations are prone to be adjacent or overlap, reducing the load-bearing capacity of the pit's outer wall and making it susceptible to crushing and failure. This results in the fixing structure 2211a losing its fixing function for the first washer 1 or the second washer 2. In this embodiment, a fixing groove is used as the fixing structure 2211a. The portions of the connected parts 203 and nut 201 embedded in the fixing structure 2211a have plastic deformation zones and elastic deformation zones. After the threaded connection is disassembled, the elastic deformation zone will recover, and only the plastic deformation zone will produce a pit. Compared with the pits produced by ratchet teeth, thorns, or spikes, the pit area is smaller and the depth is shallower, thus creating favorable conditions for repeated disassembly and assembly. It can be seen that the anti-loosening device 100 of this embodiment can better adapt to working environments that require frequent disassembly and assembly.

[0066] Optionally, the anti-loosening structure 211 further includes a second surface 2112, which is connected to the first surface 2111. The first surface 2111 has a clearance portion 2121, which is corresponding to the second surface 2112. The portion of the anti-loosening structure 211 located between the clearance portion 2121 and the second surface 2112 forms a deformation structure 212. The clearance portion 2121 provides sufficient space for the deformation structure 212 to undergo elastic deformation, allowing for greater deformation, providing a larger torque T_0, and extending the effective distance of the torque T_0, thus making the threaded connection easier to disassemble. Furthermore, in this embodiment, the deformation structure 212 is prefabricated on the anti-loosening device 100, allowing it to be formed in one step during manufacturing without separate assembly, simplifying the manufacturing process of the anti-loosening device 100 and reducing costs.

[0067] Optionally, the angle between the extension direction of the clearance portion 2121 and the second surface 2112 is greater than or equal to 0° and less than 90°, which allows the thickness of the deformable structure 212 to vary radially along the first gasket 1. In practice, the load borne by the deformable structure 212 may not be uniform. This configuration of the clearance portion 2121 allows the parts of the deformable structure 212 that bear a larger load to be thicker, while the parts that bear a smaller load to be thinner, thereby improving the lifespan of the deformable structure 212.

[0068] Optionally, the anti-loosening device 100 also includes a compensation structure 213, which is connected to the deformation structure 212 and positioned opposite to the clearance portion 2121. The compensation structure 213 is used to increase the degree of elastic deformation of the deformation structure 212. As mentioned earlier, the elastic deformation of the deformation structure 212 occurs during the tightening stage of the nut 201, when the deformation structure 212 is compressed. During this process, it is possible that the deformation structure 212 has not yet undergone significant deformation before other structures come into contact, resulting in further compression failing to increase the degree of elastic deformation of the deformation structure 212. This reduces the magnitude of the torque T_0 and shortens its effective distance, thereby reducing the promoting effect of the deformation structure 212 on the disassembly process of the threaded connection. The compensation structure 213 can assist the deformation structure 212 in fully deforming before other structures come into contact, which is beneficial for the deformation structure 212 to generate an appropriate torque T_0, thereby promoting the disassembly process of the threaded connection.

[0069] For example, the compensation structure 213 can be a protrusion prefabricated on the deformation structure 212, or it can be an independent pad, wedge, or other component. This embodiment is not limited to this.

[0070] Please see Figure 4 and Figure 5Optionally, the clearance portion 2121 is a blind groove, and the bottom of the side wall of the clearance portion 2121 is provided with a hollow portion 2122. The hollow portion 2122 extends from the side wall of the clearance portion 2121 to the second surface 2112. The hollow portion 2122 is used to adjust the stiffness of the deformation structure 212. By configuring the clearance portion 2121 as a blind groove, the clearance portion 2121 can be completely hidden between the first side 11 and the second side 21. When the anti-loosening device 100 of this embodiment is applied in a corrosive environment, it can prevent corrosive media from entering the clearance portion 2121 and causing corrosion, thereby improving the service life of the anti-loosening device 100 of this embodiment. When the clearance portion 2121 is a blind groove, the formed deformation knot is connected to other structures at least at both ends and at the bottom, thus being constrained. This makes the stiffness of the deformation structure 212 too high, making it difficult to undergo elastic deformation. The hollow portion 2122 can relieve at least one constraint of the deformable structure 212, thereby reducing the stiffness of the deformable structure 212 and making it easier for the deformable structure 212 to undergo elastic deformation. In addition, the hollow portion 2122 can also be set at the edges and corners where the deformable structure 212 is connected to other structures, to avoid stress concentration at these locations, thereby improving the reliability of the deformable structure 212.

[0071] It is easy to understand that when the corrosion resistance of the anti-loosening device 100 is not a priority, the clearance portion 2121 can extend all the way to the outer edge of the first gasket 1 and / or the second gasket 2. In this way, when the operator installs the anti-loosening device 100 of this embodiment, the degree of deformation of the deformation structure 212 can be seen intuitively, which is beneficial for the operator to handle it flexibly during the construction process.

[0072] Optionally, a lubricating medium is provided between the first side 11 and the second side 21. As mentioned earlier, when the threaded connection needs to be disassembled, the required torque T depends on the frictional force generated by the preload F. The larger the preload F and the greater the coefficient of friction, the greater the required torque T. The lubricating medium can reduce the coefficient of friction between the first gasket 1 and the second gasket, thereby reducing the torque T required to disassemble the threaded connection, making it easier to disassemble. In addition, the lubricating medium can also isolate moisture in the air, preventing the first gasket 1 and the second gasket 2 from rusting, thereby improving the life of the anti-loosening device 100.

[0073] For example, the lubricating medium can be lubricating oil or lubricating grease, and in practice, it can be selected according to factors such as the temperature of the specific operating environment and the method of replenishing the lubricating medium.

[0074] like Figure 2As shown, furthermore, an oil groove 111 may be provided on the first side 11 and / or the second side 21. The oil groove 111 is used to store the lubricating medium. When using lubricating oil, the lubricating oil in the oil groove 111 can be replenished between the first side 11 and the second side 21 through capillary action, preventing lubrication failure due to the lubricating oil drying out. When using lubricating grease, the lubricating grease can be replenished from the oil groove 111 into the space between the first side 11 and the second side 21 when the threaded connection is installed or disassembled, causing the first side 11 and the second side 21 to slide relative to each other. It should be noted that the shape of the oil groove 111 can be annular, radial, or spiral, etc., and can be selected according to the needs in practice. This embodiment does not impose any restrictions here.

[0075] Furthermore, the outer edge of the first side 11 extends along the first direction Z to form an outer retaining edge 112; the wall of the mounting hole of the first gasket 1 extends along the first direction Z to form an inner retaining edge 113, the diameter of which is smaller than the diameter of the second gasket 2, thus passing through the mounting hole of the second gasket 2; the outer retaining edge 112 and the inner retaining edge 113 are used to prevent the lubricating medium from leaking. Due to the pre-tightening force, the first side 11 and the second side 21 are usually squeezed against each other in practice, which makes it easy for the lubricating medium to be squeezed out from between the first side 11 and the second side 21. The interaction between the inner retaining edge 113 and the outer retaining edge 112 makes it difficult for the lubricating medium to leak to the outside, causing pollution to the connected part 203 or the external environment, which is beneficial to improving the environmental performance of the anti-loosening device 100 of this embodiment. In addition, the lubricating medium blocked by the inner retaining edge 113 or the outer retaining edge 112 can re-enter between the first side 11 and the second side 21, thereby improving the utilization efficiency of the lubricating medium. It is easy to understand that when the anti-loosening device 100 of this embodiment needs to be used upside down, that is, when the second gasket 2 is closer to the ground than the first gasket 1, the outer edge 112 and the inner edge 113 can also be provided at the outer edge of the second side 21 and the mounting hole of the second gasket 2.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-loosening device applied to threaded connections, characterized in that, include: A first gasket, the first gasket including a first side; The second gasket includes a second side, and the second side is disposed opposite to the first side; An anti-loosening structure is provided on the first side and the second side. When the anti-loosening structure is configured in a first state, it locks the second gasket relative to the first gasket. In a second state, it causes the second gasket to move away from the first gasket in a first direction. A deformation structure is disposed on the first side and / or the second side, wherein the deformation structure is configured to elastically deform along a second direction or a third direction in the first state, and to recover deformation along a third direction or the second direction in the second state. Wherein, the first state is that the second pad rotates relative to the first pad in a third direction, and the second state is that the second pad rotates relative to the first pad in a second direction; Wherein, the first direction is the axial direction of the first gasket, the second direction is the circumferential direction of the first gasket and is the same as the tightening direction of the threaded connection, and the third direction is the circumferential direction of the first gasket and is opposite to the second direction; In the second state, the resistance between the first gasket and the second gasket is less than the resistance between the first gasket and / or the second gasket and the threaded connection. The anti-loosening structure includes a first surface, which is inclined. The inclination direction of the first surface corresponds to the helix angle of the threaded connection, and the inclination angle of the first surface is greater than the helix angle of the threaded connection. The first surface located on the first side and the first surface located on the second side are in sliding engagement. The anti-loosening structure further includes a second surface, which is connected to the first surface; the first surface is provided with a clearance portion, which is provided corresponding to the second surface, and the portion of the anti-loosening structure located between the clearance portion and the second surface forms the deformation structure; It also includes a compensation structure, which is connected to the deformation structure and is disposed opposite to the clearance portion. The compensation structure is used to increase the degree of elastic deformation of the deformation structure.

2. The anti-loosening device for threaded connections according to claim 1, characterized in that, The angle between the extension direction of the clearance portion and the second surface is greater than or equal to 0° and less than 90°.

3. The anti-loosening device for threaded connections according to claim 1, characterized in that, The clearance section is a blind groove, and the bottom of the side wall of the clearance section is provided with a hollow section. The hollow section extends from the side wall of the clearance section to the second surface. The hollow section is used to adjust the stiffness of the deformable structure.

4. The anti-loosening device for threaded connections according to claim 1, characterized in that, The first gasket further includes a third side, and the second gasket further includes a fourth side. The third side is disposed opposite to the first side, and the fourth side is disposed opposite to the second side. The third side and the fourth side include contact surfaces. The contact surfaces include a first region and a second region that are alternately disposed along the second direction. The first region is provided with a fixing structure. The fixing structure is used to fix the first gasket to the threaded connection and / or fix the second gasket to the threaded connection. The surface of the second region is rough. Wherein, the area of ​​the first region is greater than or equal to the area of ​​the second region, or the area of ​​the first region is less than the area of ​​the second region.

5. The anti-loosening device for threaded connections according to claim 4, characterized in that, The fixing structure is a fixing groove, which includes a bottom surface that is inclined along the second direction and extends from the bottom of the fixing groove to the top of the fixing groove.

6. The anti-loosening device for threaded connections according to claim 1, characterized in that, A lubricating medium is provided between the first side and the second side.

7. A threaded connection structure, characterized in that, The device includes a nut, a bolt, a first connected component, and an anti-loosening device for threaded connections as described in any one of claims 1-6, wherein the first side abuts against the first connected component, the second side abuts against the nut, the bolt passes sequentially through the first connected component, the first washer, and the second washer, and the nut is connected to the bolt; Alternatively, it may include a screw, a second connected component, and an anti-loosening device for threaded connections as described in any one of claims 1-6, wherein the second connected component is provided with a threaded hole, the first washer and the second washer are provided corresponding to the threaded hole, and the screw is sequentially passed through the second washer, the first washer, and the threaded hole.

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