Lock nut and lock connecting assembly

Abstract

The invention discloses an anti-loose nut and an anti-loose connecting assembly, and relates to the technical field of mechanical assembly. The lock nut comprises a nut body and a lock part. First threads are formed in a threaded hole of the nut body. A first matching part is arranged on the end face, away from the equipment body, of the nut body. The anti-loosening piece is arranged in the threaded hole of the nut body in a penetrating mode, a second thread is arranged on the outer side wall of the anti-loosening piece, and the first thread is matched with the second thread in a meshed mode. Third threads are arranged on the inner side wall of the anti-loosening piece, the bolt is sleeved with the anti-loosening piece, and the third threads are matched with the threads on the bolt in a meshed mode. A second matching part corresponding to the first matching part is arranged at the end part, deviating from the equipment main body, of the anti-loosening piece; according to the lock nut provided by the invention, the lock part is arranged between the nut main body and the bolt, and the two matching parts are matched in an abutting manner, so that the looseness of the nut and bolt assembly can be avoided, and the assembly reliability of each component on the equipment main body is ensured.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly technology, and in particular to an anti-loosening nut and an anti-loosening connection assembly. Background Technology

[0002] Among the various types of mechanical equipment covered by existing technologies, the assembly process is a crucial step in ensuring the normal operation of the equipment. During the assembly process, the assembly relationships between various components must be precise and stable, because once the assembly relationships become loose, it will seriously affect the normal operation of the equipment, which may lead to unstable operation, abnormal noise, or even equipment failure and shorten the service life of the equipment.

[0003] To prevent loosening of the assembly of various components, spring washers are typically installed between the screws and nuts in the fastening structure. Due to their elasticity, the spring washers exert a certain counterforce on the nut after it is tightened, thus preventing it from loosening due to various factors during equipment operation.

[0004] However, this traditional method of preventing loosening has significant limitations. Due to the design and material of the spring washer itself, its elasticity is relatively small, and its spring distance is also relatively short. In equipment structures with minimal vibration, the spring washer might still provide some anti-loosening effect. But in structures with significant vibration, the strong vibrations generated during equipment operation will continuously impact the spring washer, causing the counterforce provided by the spring washer to be quickly exhausted. In this situation, the spring washer is prone to loosening, and may even fall off between the screw and nut, thus losing its anti-loosening function. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to overcome the shortcomings of the related art, and the present invention provides a locking nut and a locking connection assembly.

[0006] This invention provides the following technical solution: A lock nut for use in assembling with bolts installed on equipment, the lock nut comprising a nut body and a lock element.

[0007] The nut body has a first thread in its threaded hole, and a first mating part is provided on the end face of the nut body facing away from the equipment body. The anti-loosening member is a tubular shape corresponding to the threaded hole of the nut body. The anti-loosening member passes through the threaded hole of the nut body, and a second thread corresponding to the first thread is provided on the outer side wall of the anti-loosening member. The first thread and the second thread engage with each other. A third thread corresponding to the bolt thread on the equipment body is provided on the inner side wall of the anti-loosening member. The anti-loosening member is sleeved on the bolt, and the third thread engages with the thread on the bolt. A second mating part corresponding to the first mating part is provided on the end of the anti-loosening member facing away from the equipment body. The first mating part and the second mating part abut against each other to restrict the relative movement of the anti-loosening member and the nut body.

[0008] As a further improvement to the above technical solution, the anti-loosening component has a mating step at the end away from the main body of the equipment. The diameter of the mating step is not less than the outer diameter of the nut body. The second mating part is disposed on the end face of the mating step near the main body of the equipment. When the anti-loosening component is inserted into the threaded hole of the nut body, the first mating part can abut against the second mating part.

[0009] As a further improvement to the above technical solution, the end face of the mating step near the main body of the equipment is provided with a tapered surface that protrudes toward the nut body to form a second mating part; the end face of the nut body away from the main body of the equipment is a tapered surface that is recessed toward the mating step to form a first mating part; the taper of the first mating part is not equal to the taper of the second mating part.

[0010] As a further improvement to the above technical solution, the taper of the first mating part is greater than that of the second mating part; when the anti-loosening member is inserted into the threaded hole of the nut body, the outer edge of the second mating part abuts against the first mating part.

[0011] As a further improvement to the above technical solution, the cross-section of the nut body is a regular polygon.

[0012] As a further improvement to the above technical solution, the outer diameter of the second mating part is larger than the inscribed circle diameter of the cross-section of the nut body, and the outer diameter of the second mating part is smaller than the inscribed circle diameter of the cross-section of the nut body.

[0013] As a further improvement to the above technical solution, the direction of rotation of the second thread is opposite to that of the third thread.

[0014] As a further improvement to the above technical solution, the pitch of the second thread is greater than the pitch of the third thread.

[0015] As a further improvement to the above technical solution, the setting length of the anti-loosening component is L1, and the setting length of the nut body is L2. The values ​​of L1 and L2 satisfy: L1 < L2.

[0016] The present invention also provides an anti-loosening connection assembly, comprising a bolt and an anti-loosening nut as described above.

[0017] Compared with related technologies, the advantages of this invention are: The anti-loosening nut provided by this invention, when used in conjunction with bolts for assembling and installing equipment components, requires the operator to first place the nut body around the bolt, ensuring accurate relative positioning between the nut body and the bolt. Next, the anti-loosening component is gradually moved closer to the bolt, allowing the third thread on the inner wall of the anti-loosening component to engage with the thread on the side wall of the bolt. During operation, the anti-loosening component is slowly rotated; as it rotates relative to the bolt, it gradually moves closer to the nut body along the axial direction of the bolt. When the anti-loosening component reaches a certain position, the pre-set second thread on the outer wall of the anti-loosening component engages with the corresponding first thread in the threaded hole of the nut body. As the first and second threads gradually engage, the second mating part on the anti-loosening component abuts against the corresponding first mating part on the nut body. When the second thread and the first thread are fully engaged, and the second mating part is tightly abutting against the first mating part, the assembly and installation of the component on the equipment body is successfully completed.

[0018] During equipment operation, the close fit between the first and second mating parts, and the stable fit between the second and third threads and the nut body and bolt respectively, form two sets of mutually cooperating threaded mating systems. These two sets of threaded mating systems effectively prevent any loosening or rotation between the anti-loosening nut and bolt. When the equipment is subjected to various external forces during operation, attempting to loosen or rotate the anti-loosening nut and bolt, these two sets of threaded mating systems will mutually restrain each other, preventing this loosening tendency from occurring, thus avoiding equipment malfunctions due to loose installation and ensuring the normal operation of the equipment.

[0019] Furthermore, the mating fit between the first and second mating parts plays another crucial role. During equipment operation, various vibrations are inevitably generated, which are transmitted within the equipment body in the form of waves. The mating surfaces of the first and second mating parts, due to their mutually contacting structural design, become the primary path for the transmission of vibrations to the equipment body. When the vibration wave reaches this mating surface, some of the vibration energy is absorbed and dissipated, thereby reducing the vibration wave transmitted to the anti-loosening nut and bolt assembly. This effective reduction of vibration waves further ensures the reliability of the anti-loosening nut and bolt assembly, extends the equipment's service life, and improves its working efficiency and stability.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This diagram shows a schematic view of the anti-loosening nut in one embodiment of the present invention. Figure 2 A cross-sectional view of the anti-loosening nut in one embodiment of the present invention is shown; Figure 3 This shows a schematic diagram of the nut body from one perspective in one embodiment of the present invention; Figure 4 A schematic diagram of the anti-loosening component from one perspective is shown in one embodiment of the present invention.

[0023] Explanation of key component symbols: 110 - Equipment body; 120 - Bolt; 200 - Nut body; 210 - First thread; 220 - First mating part; 300 - Anti-loosening part; 310 - Second thread; 320 - Third thread; 330 - Second mating part; 340 - Mating step; 350 - Smooth section. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] Combination Figures 1 to 4 As shown, an embodiment of the present invention provides a locking nut for assembly connection with a bolt 120 installed on a device. The locking nut includes a nut body 200 and a locking component 300.

[0030] The nut body 200 has a first thread 210 inside its threaded hole, and a first mating part 220 is provided on the end face of the nut body 200 opposite to the equipment body 110. The anti-loosening member 300 is a tubular shape corresponding to the threaded hole of the nut body 200. The anti-loosening member 300 passes through the threaded hole of the nut body 200, and a second thread 310 corresponding to the first thread 210 is provided on the outer side wall of the anti-loosening member 300. The first thread 210 and the second thread 310 are engaged. The inner sidewall is provided with a third thread 320 corresponding to the thread of the bolt 120 on the equipment body 110. The anti-loosening member 300 is sleeved on the bolt 120, and the third thread 320 is engaged with the thread on the bolt 120. The end of the anti-loosening member 300 away from the equipment body 110 is provided with a second mating part 330 corresponding to the first mating part 220. The first mating part 220 and the second mating part 330 abut against each other to restrict the relative movement of the anti-loosening member 300 and the nut body 200.

[0031] The anti-loosening nut provided in this embodiment is used in conjunction with bolt 120 for assembling and installing equipment components. The operator must first place the nut body 200 around the bolt 120 to ensure accurate relative positioning. Next, the anti-loosening component 300 is gradually moved closer to the bolt 120, so that the third thread 320 on the inner wall of the anti-loosening component 300 engages with the thread on the side wall of the bolt 120. During operation, the anti-loosening component 300 is slowly rotated. As the anti-loosening component 300 rotates relative to the bolt 120, it gradually moves closer to the nut body 200 along the axial direction of the bolt 120. When the anti-loosening component 300 approaches a certain position, the pre-set second thread 310 on the outer wall of the anti-loosening component 300 engages with the corresponding first thread 210 in the threaded hole of the nut body 200. As the first thread 210 and the second thread 310 gradually engage, the second mating part 330 on the anti-loosening member 300 can abut against the corresponding first mating part 220 on the nut body 200. When the second thread 310 and the first thread 210 are fully engaged, and the second mating part 330 and the first mating part 220 are tightly abutted, it signifies that the assembly and installation of the components on the equipment body 110 has been successfully completed.

[0032] During equipment operation, the close fit between the first mating part 220 and the second mating part 330, and the stable fit between the second thread 310 and the third thread 320 and the nut body 200 and bolt 120 respectively, form two sets of mutually cooperating threaded mating systems. These two sets of threaded mating systems effectively prevent any loosening or rotation between the anti-loosening nut and bolt 120. When the equipment is subjected to various external forces during operation, attempting to loosen or rotate the anti-loosening nut and bolt 120, these two sets of threaded mating systems will mutually restrain each other, preventing such loosening and thus avoiding equipment malfunctions due to loose installation, ensuring the normal operation of the equipment.

[0033] Furthermore, the mating fit between the first mating part 220 and the second mating part 330 plays another important role. During equipment operation, various vibrations are inevitably generated, and these vibrations are transmitted within the equipment body 110 in the form of waves. The mating surfaces of the first mating part 220 and the second mating part 330, due to their mutually contacting structural design, become the main path for the transmission of vibrations to the equipment body 110. When the vibration wave reaches this mating surface, some of the vibration energy is absorbed and dissipated, thereby reducing the vibration wave transmitted to the assembly of the anti-loosening nut and bolt 120. This effective reduction of vibration waves further ensures the reliability of the anti-loosening nut and bolt 120 assembly, extends the service life of the equipment, and improves the equipment's working efficiency and stability.

[0034] In some specific embodiments, the anti-loosening member 300 has a mating step 340 at the end opposite to the equipment body 110. The diameter of the mating step 340 is not less than the outer diameter of the nut body 200. The second mating part 330 is disposed on the end face of the mating step 340 near the equipment body 110. When the anti-loosening member 300 passes through the threaded hole of the nut body 200, the first mating part 220 can abut against the second mating part 330 to ensure the reliability of the abutment between the two mating parts.

[0035] In some specific embodiments, the end face of the mating step 340 near the device body 110 has a tapered surface protruding towards the nut body 200 to form a second mating part 330; the end face of the nut body 200 away from the device body 110 has a tapered surface recessed away from the mating step 340 to form a first mating part 220; the taper of the first mating part 220 is not equal to the taper of the second mating part 330; when the first mating part 220 and the second mating part 330 mate, due to the difference in taper, they will not form a large area of ​​surface contact, but rather a line contact. Line contact has unique advantages over surface contact. During equipment operation, various vibration waves are inevitably generated, and these vibration waves are transmitted through the connection structure between components. The line contact between the first mating part 220 and the second mating part 330 can greatly reduce the transmission of vibration waves. Because the contact area of ​​the line contact is small, the vibration wave is more hindered during transmission and loses more energy, thus effectively reducing the impact of vibration on the connection between the anti-loosening component 300 and the bolt 120.

[0036] This ingenious design further prevents loosening and rotation between the anti-loosening component 300 and the bolt 120 due to vibration, greatly improving the reliability and stability of the entire anti-loosening structure. It ensures that the equipment can maintain the tightness of the assembly during long-term operation, reduces failures and safety hazards caused by loosening, extends the service life of the equipment, and improves the working efficiency and performance of the equipment.

[0037] In some specific embodiments, the taper of the first mating part 220 is greater than the taper of the second mating part 330; when the anti-loosening member 300 passes through the threaded hole of the nut body 200, the outer edge of the second mating part 330 abuts against the first mating part 220, which facilitates the formation of a reliable line contact fit and ensures the reliability of this embodiment.

[0038] In some specific embodiments, the cross-section of the nut body 200 is a regular polygon. In actual installation and maintenance scenarios, operators need to use tools such as wrenches to operate the nut body 200. When the cross-section of the nut body 200 is a regular polygon, tools such as wrenches can be easily clamped on the edges of the nut body 200. Taking a common adjustable wrench as an example, its opening can fit well with the edge of the regular polygonal nut body 200. By adjusting the size of the wrench's opening, the nut body 200 can be firmly clamped, thereby applying sufficient torque to tighten or loosen the nut.

[0039] This design significantly improves installation and maintenance efficiency. Operators do not need to spend a lot of time finding suitable clamping positions or using special tools; they can easily complete the installation and maintenance work of this embodiment using only a common wrench. At the same time, the regular polygonal design ensures stable contact between the tool and the nut body 200 during clamping, preventing slippage and further improving operational safety and reliability.

[0040] In some specific embodiments, the outer diameter of the second mating part 330 is larger than the inscribed circle diameter of the cross-section of the nut body 200, and the outer diameter of the second mating part 330 is smaller than the circumscribed circle diameter of the cross-section of the nut body 200. Based on the above dimensional relationship, the outer diameter of the second mating part 330 can be easily divided into discontinuous segments during the manufacturing process. This discontinuous segment design makes the abutment fit between the second mating part 330 and the first mating part 220 a multi-segment abutment fit. During equipment operation, various vibration waves are inevitably generated, and these vibration waves are transmitted through the connection structure between components. In the multi-segment abutment fit method, since the contact surface is divided into multiple segments, the vibration wave will be hindered and energy lost to varying degrees when it is transmitted to each segment of the contact surface. Each segment of the contact surface can absorb and disperse a portion of the vibration energy, thereby significantly weakening the vibration wave during the overall transmission process. This multi-segment line abutment design further reduces the transmission of vibration waves from the nut body 200 to the anti-loosening component 300 and bolt 120, effectively preventing loosening and rotation between the anti-loosening component 300 and bolt 120 due to vibration. This ensures that the anti-loosening component 300 and bolt 120 always maintain a reliable and tight fit, greatly improving the stability and reliability of the entire anti-loosening structure and guaranteeing the safety and performance stability of the equipment during long-term operation.

[0041] In some specific embodiments, the direction of rotation of the second thread 310 is opposite to that of the third thread 320; that is, the third thread 320 corresponding to the thread of bolt 120 is a positive thread, while the first thread 210 and the second thread 310 are negative threads. During actual equipment operation, when the nut body 200 is subjected to equipment vibration, due to its own structural characteristics and its connection with surrounding components, it will exhibit a tendency to loosen and rotate in the positive direction. This tendency to loosen and rotate is caused by the vibration energy being transmitted to the nut body 200, disturbing its originally stable assembly state.

[0042] Because of the meshing relationship between the first thread 210 and the second thread 310, when the nut body 200 exhibits a tendency to loosen and rotate, this rotation is transmitted to the anti-loosening component 300 through the thread meshing. According to the principle of force transmission and decomposition, the anti-loosening component 300 will therefore experience a force that moves closer to the device body 110. This force is generated based on the interaction of forces during thread meshing; the rotation of the nut body 200 causes the anti-loosening component 300 to tend to move in a specific direction.

[0043] The force that moves towards the main body 110 of the device does not simply act on the anti-loosening component 300 itself; it can be further decomposed. In the mating structure between the anti-loosening component 300 and the bolt 120, this force is decomposed into a positive tightening force between the third thread 320 of the anti-loosening component 300 and the bolt 120. In other words, the tendency that might have loosened due to vibration is transformed into a force that strengthens the fit between the anti-loosening component 300 and the bolt 120 through this ingenious design.

[0044] The generation of this positive tightening force greatly improves the reliability of the fit between the anti-loosening component 300 and the bolt 120. It allows the anti-loosening component 300 to be more tightly fixed to the bolt 120, effectively preventing loosening or separation between the anti-loosening component 300 and the bolt 120 even under complex operating conditions such as continuous equipment vibration and exposure to large external forces. This ensures the stability and safety of the entire mechanical structure, extends the service life of the equipment, and reduces malfunctions and maintenance costs caused by loose components.

[0045] In some specific embodiments, the second mating portion 330 is further provided with a smooth section 350 near the second thread 310, the outer diameter of which is less than or equal to the root circle diameter of the second thread 310. This arrangement ensures that the length of the first thread 210 is greater than the length of the third thread 320, thereby allowing the assembly range of the first thread 210 to fully encompass the assembly range of the third thread 320. This encompassing relationship ensures that during vibration, the reverse vibration can be fully transmitted, facilitating better reverse vibration inertia for the anti-loosening member 300 when the nut body 200 vibrates relative to the anti-loosening member 300, and reducing the upward vibration force generated by the nut on the anti-loosening member 300 due to vibration.

[0046] In some specific embodiments, the pitch of the second thread 310 is greater than the pitch of the third thread 320. When the equipment vibrates during operation or is subjected to other external forces, the anti-loosening component 300 may tend to loosen and rotate relative to the bolt 120. At this time, the different pitch characteristics of the second thread 310 and the third thread 320 come into play. Because the second thread 310 has a larger pitch, its axial movement is relatively faster during loosening and rotation; while the third thread 320 has a smaller pitch, and its axial movement is relatively slower. This speed difference will generate a mutually restraining force at the threaded joint.

[0047] Specifically, when the nut body 200 shows signs of loosening and rotation, the tendency of the second thread 310 to move rapidly axially will be hindered by the relatively slow movement of the third thread 320, and a top pressure will be formed on the contact surface between the third thread 320 and the thread on the bolt 120, increasing the friction between the third thread 320 and the thread on the bolt 120, thereby preventing the anti-loosening component 300 from easily loosening and rotating relative to the bolt 120.

[0048] By using a design where the pitch of the second thread 310 is greater than that of the third thread 320, the resistance of the nut body 200 to the loosening rotation of the anti-loosening component 300 relative to the bolt 120 is further enhanced. This improves the reliability and stability of the entire anti-loosening structure, effectively reduces the risk of equipment failure due to component loosening, ensures that the equipment maintains normal operating conditions during long-term operation, extends the service life of the equipment, and reduces the frequency and cost of maintenance and component replacement.

[0049] In some specific embodiments, the length of the anti-loosening component 300 is L1, and the length of the nut body 200 is L2, where L1 < L2. Since the anti-loosening component 300 typically achieves its anti-loosening function through its cooperation with the nut body 200 and bolt 120, when a large number of vibration waves directly act on the anti-loosening component 300, it will interfere with the cooperation between it and the nut body 200 and bolt 120. The vibration waves may cause a small relative displacement between the anti-loosening component 300 and the nut body 200 and bolt 120. Over time and with an increase in the number of vibrations, this small displacement will gradually accumulate, eventually leading to loosening of the cooperation between the anti-loosening component 300 and the nut body 200 and bolt 120, thereby reducing the reliability of the entire anti-loosening structure and affecting the normal operation of the equipment.

[0050] When the condition L1 < L2 is met, the nut body 200 is longer than the anti-loosening component 300. During transmission, the vibration wave generated by the main body 110 will first act on the nut body 200. The nut body 200 will absorb and attenuate the vibration wave to a certain extent. After passing through the nut body 200, the vibration wave, through the abutting fit of the first mating part 220 and the second mating part 330, is transmitted to the anti-loosening component 300, and its energy has been significantly reduced.

[0051] This length setting effectively avoids direct contact between the anti-loosening component 300 and the equipment body 110, significantly reducing the vibration waves received by the anti-loosening component 300. This allows the anti-loosening component 300 to operate in a relatively stable environment, maintaining a reliable fit with the nut body 200 and the bolt 120, thereby improving the stability and reliability of the entire anti-loosening structure, ensuring the safety and performance stability of the equipment during long-term operation, and reducing equipment failures and maintenance costs caused by anti-loosening failure.

[0052] An embodiment of the present invention also provides an anti-loosening connection assembly, including a bolt 120 and an anti-loosening nut as described in the above embodiment. The anti-loosening nut is sleeved on the bolt 120 and is used to assemble and install corresponding parts of the equipment body 110 together. The anti-loosening connection assembly has all the beneficial effects of the anti-loosening nut, which will not be specifically described here.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A lock nut for assembly connection with a bolt (120) mounted on equipment, characterized in that, include: The nut body (200) has a first thread (210) in its threaded hole and a first mating part (220) on its end face away from the equipment body (110). An anti-loosening component (300) is a tubular part corresponding to the threaded hole of the nut body (200). The anti-loosening component (300) passes through the threaded hole of the nut body (200). The outer side wall of the anti-loosening component (300) is provided with a second thread (310) corresponding to the first thread (210). The first thread (210) and the second thread (310) are engaged. The inner side wall of the anti-loosening component (300) is provided with a thread corresponding to the bolt (120) on the equipment body (110). The third thread (320) is fitted onto the bolt (120), and the anti-loosening member (300) is engaged with the thread on the bolt (120). The end of the anti-loosening member (300) away from the main body (110) is provided with a second mating part (330) corresponding to the first mating part (220). The first mating part (220) and the second mating part (330) abut against each other to restrict the relative movement of the anti-loosening member (300) and the nut body (200).

2. The anti-loosening nut according to claim 1, characterized in that, The anti-loosening component (300) has a mating step (340) at the end away from the main body (110). The diameter of the mating step (340) is not less than the outer diameter of the nut body (200). The second mating part (330) is provided on the end face of the mating step (340) near the main body (110). When the anti-loosening component (300) is inserted into the threaded hole of the nut body (200), the first mating part (220) can abut against the second mating part (330).

3. The anti-loosening nut according to claim 2, characterized in that, The mating step (340) has a tapered surface protruding towards the nut body (200) on its end face near the equipment body (110) to form a second mating part (330); the end face of the nut body (200) away from the equipment body (110) is a tapered surface recessed away from the mating step (340) to form a first mating part (220); the taper of the first mating part (220) is not equal to the taper of the second mating part (330).

4. The anti-loosening nut according to claim 3, characterized in that, The taper of the first mating part (220) is greater than the taper of the second mating part (330); when the anti-loosening member (300) passes through the threaded hole of the nut body (200), the outer edge of the second mating part (330) abuts against the first mating part (220).

5. The anti-loosening nut according to claim 4, characterized in that, The cross-section of the nut body (200) is a regular polygon.

6. The anti-loosening nut according to claim 5, characterized in that, The outer diameter of the second mating part (330) is larger than the inscribed circle diameter of the cross-section of the nut body (200), and the outer diameter of the second mating part (330) is smaller than the circumscribed circle diameter of the cross-section of the nut body (200).

7. The anti-loosening nut according to any one of claims 1 to 6, characterized in that, The direction of rotation of the second thread (310) is opposite to that of the third thread (320).

8. The anti-loosening nut according to any one of claims 1 to 6, characterized in that, The pitch of the second thread (310) is greater than the pitch of the third thread (320).

9. The anti-loosening nut according to any one of claims 1 to 6, characterized in that, The length of the anti-loosening component (300) is L1, and the length of the nut body (200) is L2. The values ​​of L1 and L2 satisfy: L1 < L2.

10. An anti-loosening connection assembly, characterized in that, Includes bolts (120) and lock nuts as claimed in any one of claims 1 to 9.

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