Lock nut and locking method thereof

Abstract

The locknut comprises a first nut body, the first nut body comprises a first hexagonal block, a first connecting threaded hole and a locking hole are formed in the first hexagonal block, and a hole shoulder is formed in the communicating position of the first connecting threaded hole and the locking hole; clamping blocks are arranged in the circumferential direction of the axis of the locking hole at intervals, deformation blocks with elastic deformation capacity are arranged between the clamping blocks and a hole shoulder, a separation gap is formed between every two adjacent clamping blocks, each clamping block is provided with an inwards-sunken arc wall, and locking internal threads are arranged on the inner side of each arc wall. The lower end face of the clamping block protrudes out of the lower end of the first hexagonal block. During installation, self-locking is formed, the anti-loosening performance is high, loosening detection can be carried out, and the locking state and the loosening condition of the operation nut can be monitored in real time.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-loosening nuts, and particularly relates to an anti-loosening nut and an anti-loosening method thereof. Background Art

[0002] Nuts are common fasteners in mechanical manufacturing and assembly, and their tightening performance directly affects the stability and safety of the machinery. However, existing nuts often loosen after installation, which not only affects the normal operation of the machinery but also poses serious safety risks.

[0003] Nut loosening is caused by a variety of factors, including insufficient material strength, mismatched thread specifications, insufficient tightening torque, vibration, and impact. For example, when the bolt material strength is below standard, plastic deformation can occur during tightening as the preload increases, leading to a gradual decrease in clamping force and, consequently, loosening. Furthermore, improper thread specifications and dimensions can affect the preload applied to the bolt, further contributing to loosening.

[0004] To address the problem of nut loosening, the industry has tried various methods. One common approach is to insert washers, such as flat washers and spring washers, between the nut and the connected component. Flat washers distribute the pressure of the nut on the connected component, protecting the surface; spring washers, on the other hand, increase preload through their elasticity, preventing friction between the bolt and the workpiece. However, spring washers have relatively weak anti-loosening capabilities and may not achieve the desired effect in some cases.

[0005] Another effective method is to use self-locking nuts. Their unique design allows them to remain secure even under vibration or shock. However, they require additional force to tighten, and in some cases, they may need to be combined with other fasteners to further enhance the tightening effect.

[0006] In summary, the problem that existing nuts are easily loosened after installation needs to be solved urgently. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to develop a new type of nut or anti-loosening method to improve the fastening effect and anti-loosening ability of the nut and ensure the stability and safety of the machine.

[0008] The object of the present invention is achieved as follows: a lock nut, which includes a first nut body, the first nut body includes a first hexagonal block, a first connecting threaded hole and a locking hole are opened inside the first hexagonal block, the connection between the first connecting threaded hole and the locking hole forms a hole shoulder, clamping blocks are arranged at circumferential intervals along the axis of the locking hole, a deformation block with elastic deformation ability is arranged between the clamping block and the hole shoulder, a separation gap is formed between adjacent clamping blocks, the clamping block has an inwardly concave arc wall, a locking internal thread is provided on the inner side of the arc wall, and the lower end face of the clamping block protrudes from the lower end face of the first hexagonal block.

[0009] The first connecting threaded hole and the locking hole are connected in sequence from top to bottom and pass through the upper and lower end surfaces of the first hexagonal block. The diameter of the first connecting threaded hole is smaller than the diameter of the locking hole.

[0010] The locking hole is shaped as a circular hole, and the clamping block is shaped as an arc block. The clamping block has an outer arc surface that convexes outward, and the outer arc surface is spaced apart from the inner wall of the locking hole. The lower end face of the clamping block is an abutment slope, and the abutment slope is inclined downward in the direction close to the axis of the locking hole.

[0011] The first nut body also includes a locking rod, the first hexagonal block is provided with a first sliding channel, the upper end surface of the clamping block, the deformation block, and the top wall of the locking hole together form a locking channel connected to the first sliding channel, the locking channel is located on the side away from the locking internal thread, the locking rod is slidably arranged in the first sliding channel, the bottom wall of the first sliding channel is inclined, and the bottom wall of the first sliding channel extends downward in a direction away from the locking channel, one end of the clamping block forms a limiting portion higher than the first sliding channel, and the limiting portion is located at the connection point of the first sliding channel, the locking hole, and the locking channel.

[0012] A driving spring is installed in the first sliding channel, and the locking rod is provided with a limiting slide. One end of the driving spring is connected to the limiting slide, and the other end of the driving spring is connected to the inner wall of the first sliding channel.

[0013] The first nut body also includes a sleeve fixedly connected to the first hexagonal block, the sleeve is located on the upper end surface of the first hexagonal block, the sleeve is provided with a mounting hole connected to the first connecting threaded hole, and an anti-loosening spring is installed in the mounting hole.

[0014] It also includes a second nut body, the second nut body has a second hexagonal block, the second hexagonal block is provided with a second connecting threaded hole, the second hexagonal block is provided with a sleeve groove, the second connecting threaded hole and the sleeve groove are connected in sequence from top to bottom and pass through the second hexagonal block, and the second hexagonal block is sleeved on the sleeve through the sleeve groove.

[0015] A second sliding channel is provided inside the first hexagonal block, and the second sliding channel extends from top to bottom and is connected to the first sliding channel. A push rod is slidably provided inside the second sliding channel, and the upper end of the push rod protrudes from the upper end surface of the first hexagonal block, and the lower end of the push rod has a second push inclined surface. The locking rod has a first push inclined surface, and the first push inclined surface is located in the path where the second push inclined surface of the push rod moves downward. A limiting slide is provided on the push rod, and the limiting slide is slidably installed in the second sliding channel. The push rod sleeve is provided with a driving spring, and the driving spring is connected to the limiting slide and the first hexagonal block. When the push rod slides downward, the driving spring is in a compressed state.

[0016] The locknut also includes a pressure sensor. This allows for loosening detection, monitoring the locknut's tightening and loosening status in real time. The pressure sensor can be mounted on the abutment slope, or on the locking channel, the upper end face of the first hexagonal block, the lower end face of the second hexagonal block, or other locations to monitor pressure and, therefore, the locknut's tightening and loosening status.

[0017] It is understandable that the locking state and looseness of the anti-loosening nut can also be monitored by installing displacement sensors on the deformation block, clamping block and other components to detect the deformation of the deformation block and the position of the clamping block.

[0018] Optionally, the first connecting threaded hole, the locking internal thread, and the second connecting threaded hole can utilize trapezoidal asymmetric threads to increase the contact area during the threaded connection, which helps disperse stress, improve load-bearing capacity, and reduce the risk of localized wear and breakage. Properly designed trapezoidal thread profile angles can generate sufficient friction during the screwing process, ensuring a reliable and self-locking connection.

[0019] A method for preventing loosening, based on the above-mentioned anti-loosening nut, comprises the following steps: S10: After the bolt passes through the mounting panel, the first nut body is threadedly connected to the bolt until the first hexagonal block of the first nut body and the rod head of the bolt jointly clamp the mounting panel; S20, the mounting panel and the lower end surface of the clamping block are pressed against each other, causing the deforming block to deform. The clamping blocks move closer to each other and tightly clamp the bolt using the locking internal thread to prevent the first nut body from loosening. S30, after the clamping blocks are close to the locking bolts, the locking rod 4 slides into the locking channel to prevent the clamping blocks from resetting and improve the locking stability.

[0020] The S30 further includes installing a second nut body, rotating the second hexagonal block of the second nut body to be installed on the bolt, and the second hexagonal block and the first hexagonal block abut against each other to achieve further anti-loosening. When the second hexagonal block is installed on the bolt and abuts against the upper end face of the first hexagonal block, the lower end face of the second hexagonal block abuts against the push rod, causing the push rod to slide downward, and the push rod pushes the locking rod to insert into the locking channel.

[0021] The beneficial effects of the present invention are as follows: the locking internal thread on the inner wall of the clamping block in the first nut body forms a double-thread engagement with the first connecting threaded hole. When the bolt is screwed in, the clamping block is subjected to radial compression to produce elastic deformation, and a continuous radial clamping force is provided by the deformation block, which significantly enhances the friction resistance between the threads. The second nut body is nested with the sleeve through the sleeve groove to form an axial mechanical lock, and cooperates with the axial preload of the anti-loosening spring to construct a three-dimensional anti-loosening system of "radial clamping + axial top pressure". The deformation block absorbs radial vibration energy to maintain the continuous clamping of the clamping block on the bolt, and the anti-loosening spring buffers the axial impact to prevent the nut from loosening due to axial load fluctuations.

[0022] The push rod-locking rod inclined surface transmission mechanism realizes controllable adjustment of the locking state. Under normal circumstances, the push rod moves downward to keep the locking rod in a wedged state, forcing the clamping block to remain retracted and locked. When disassembly is required, the push rod drives the locking rod back through the inclined surface, releasing the deformation of the clamping block and realizing quick disassembly.

[0023] The clamping block utilizes a circular arc-shaped block structure, with gaps separating the blocks allowing for controlled deformation to avoid stress concentration. Deformation space is left between the locking hole and the outer arc surface of the clamping block, which, combined with the elastic deformation capacity of the deformation block, prevents failure. The first nut body features upper and lower through-holes, allowing for direct bolt installation without the need for pre-installed special tools. The second nut body is quickly positioned via a sleeve, and the pre-compression characteristics of the anti-loosening spring simplify the dual-nut installation process. If the anti-loosening nut becomes loose, a pressure sensor detects the decrease in pressure and notifies the user of the loose nut in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 and Figure 2 is a structural schematic diagram of the first nut body; Figure 3 is a half-section view of the first nut body; Figure 4 A schematic structural diagram of a first nut body and a second nut body; Figure 5 It is a cross-sectional view of the cooperation between the first nut body and the second nut body.

[0025] In the picture: 1. First nut body; 2. Second nut body; 3. Anti-loosening spring; 4. Locking rod; 5. Push rod; 6. Drive spring; 7. Limiting slide; 101. First hexagonal block; 102. Sleeve; 103. Clamping block; 104. First connecting threaded hole; 105. Locking internal thread; 106. Locking hole; 107. Separating gap; 108. Deformation block; 109. Abutting inclined surface; 110. First sliding channel; 111. Second sliding channel; 112. Locking channel; 113. Limiting portion; 114. Mounting hole; 201, second hexagonal block; 202, sleeve groove; 203, second connecting threaded hole; 401, first push ramp; 501. Second push slope. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings. Example 1

[0027] like Figure 1-3 As shown, a locking nut includes a first nut body 1, the first nut body 1 including a first hexagonal block 101, a first connecting threaded hole 104 and a locking hole 106 are formed inside the first hexagonal block 101, the connection between the first connecting threaded hole 104 and the locking hole 106 forms a hole shoulder, clamping blocks 103 are arranged circumferentially spaced apart along the axis of the locking hole 106, a deformation block 108 with elastic deformation capability is arranged between the clamping blocks 103 and the hole shoulder, and a separation gap 107 is formed between adjacent clamping blocks 103, each of the clamping blocks 103 having an inwardly concave arc wall with a locking internal thread 105 provided on the inner side of the arc wall, and the lower end surface of the clamping block 103 protrudes from the lower end surface of the first hexagonal block 101. The separation gap 107 provides a clearance for the clamping blocks 103 to approach each other and avoid interference. When the deformation block 108 is deformed so that the clamping blocks 103 are close to each other, the locking internal threads 105 of the clamping blocks 103 abut against the external threads of the bolt, thereby achieving clamping and locking.

[0028] For better effect, the first connecting threaded hole 104 and the locking hole 106 are connected in sequence from top to bottom and pass through the upper and lower end surfaces of the first hexagonal block 101 . The diameter of the first connecting threaded hole 104 is smaller than that of the locking hole 106 .

[0029] For better results, the locking hole 106 is shaped as a circular hole, and the clamping block 103 is shaped as an arc block. The clamping block 103 has an outwardly convex outer arc surface, which is spaced apart from the inner wall of the locking hole 106. The lower end surface of the clamping block 103 is an abutting inclined surface 109, which is inclined downward in the direction close to the axis of the locking hole 106. When the abutting inclined surface 109 abuts the installation panel, the clamping block 103 can approach the axis of the locking hole 106 and tightly clamp the bolt using the locking internal thread 105.

[0030] For better effect, the first nut body 1 also includes a locking rod 4, the first hexagonal block 101 is provided with a first sliding channel 110, the upper end surface of the clamping block 103, the deformation block 108, and the top wall of the locking hole 106 together form a locking channel 112 connected to the first sliding channel 110, and the locking channel 112 is located on the side away from the locking internal thread 105, and the locking rod 4 is slidably arranged in the first sliding channel 110, and the bottom wall of the first sliding channel 110 is inclined, and the bottom wall of the first sliding channel 110 extends downward in a direction away from the locking channel 112, and one end of the clamping block 103 forms a limiting portion 113 higher than the first sliding channel 110, and the limiting portion 113 is located at the connection point of the first sliding channel 110, the locking hole 106, and the locking channel 112.

[0031] For better results, a drive spring 6 is installed in the first sliding channel 110, and the locking rod 4 is provided with a limiting slide 7. One end of the drive spring 6 is connected to the limiting slide 7, and the other end of the drive spring 6 is connected to the inner wall of the first sliding channel 110. When the lock nut is installed so that the locking internal thread 105 is close to the bolt, the elasticity of the drive spring 6 allows one end of the locking rod 4 to be inserted into the locking channel 112, thereby achieving locking.

[0032] During use, when the first nut body 1 is installed, it rotates along the bolt and approaches the mounting panel. When the lower end surface of the clamping block 103 abuts the mounting panel, the mounting panel squeezes the lower end surface of the clamping block 103, causing the deformation block 108 to deform, forcing the clamping blocks 103 closer together (by tilting the lower end surfaces of the clamping blocks 103 or abutting the outer sides of the clamping blocks 103 against the inner walls of the locking holes 106, the clamping blocks 103 are restricted to moving closer together). The locking internal threads 105 then tightly clamp the bolt, preventing the first nut body 1 from loosening. The first nut body 1 is self-locking during installation, providing strong anti-loosening properties.

[0033] Before the anti-loosening nut is installed, one end of the locking rod 4 abuts against the limiting portion 113 to prevent the locking rod 4 from being inserted into the locking channel 112. When the anti-loosening nut is installed so that the locking internal thread 105 is close to the bolt, the limiting portion 113 moves downward, and the locking channel 112 is enlarged. At this time, one end of the locking rod 4 can be inserted into the locking channel 112 to prevent the clamping block 103 from resetting, so that the locking clamping force of the clamping block 103 on the bolt is more stable. The locking rod 4 can be inserted into the locking channel 112 manually, or it can be automatically inserted after the anti-loosening nut is installed using elastic members such as springs. When the anti-loosening nut needs to be removed, the locking rod 4 can be manually disengaged from the locking channel 112 to unlock it, and then the anti-loosening nut can be rotated to remove it.

[0034] The present invention organically combines mechanical structure innovation with elastic elements, effectively improving the anti-loosening performance while retaining the operational convenience of traditional hexagonal nuts, and has high reliability, long life and easy maintenance. Example 2

[0035] like Figure 1-4 As shown, a locking nut includes a first nut body 1, the first nut body 1 including a first hexagonal block 101, a first connecting threaded hole 104 and a locking hole 106 are formed inside the first hexagonal block 101, the connection between the first connecting threaded hole 104 and the locking hole 106 forms a hole shoulder, clamping blocks 103 are arranged circumferentially spaced apart along the axis of the locking hole 106, a deformation block 108 with elastic deformation capability is arranged between the clamping blocks 103 and the hole shoulder, and a separation gap 107 is formed between adjacent clamping blocks 103, each of the clamping blocks 103 having an inwardly concave arc wall with a locking internal thread 105 provided on the inner side of the arc wall, and the lower end surface of the clamping block 103 protrudes from the lower end surface of the first hexagonal block 101. The separation gap 107 provides a clearance for the clamping blocks 103 to approach each other and avoid interference. When the deformation block 108 is deformed so that the clamping blocks 103 are close to each other, the locking internal threads 105 of the clamping blocks 103 abut against the external threads of the bolt, thereby achieving clamping and locking.

[0036] For better effect, the first connecting threaded hole 104 and the locking hole 106 are connected in sequence from top to bottom and pass through the upper and lower end surfaces of the first hexagonal block 101 . The diameter of the first connecting threaded hole 104 is smaller than that of the locking hole 106 .

[0037] For better results, the locking hole 106 is shaped as a circular hole, and the clamping block 103 is shaped as an arc block. The clamping block 103 has an outwardly convex outer arc surface, which is spaced apart from the inner wall of the locking hole 106. The lower end surface of the clamping block 103 is an abutting inclined surface 109, which is inclined downward in the direction close to the axis of the locking hole 106. When the abutting inclined surface 109 abuts the installation panel, the clamping block 103 can approach the axis of the locking hole 106 and tightly clamp the bolt using the locking internal thread 105.

[0038] For better effect, the first nut body 1 also includes a locking rod 4, the first hexagonal block 101 is provided with a first sliding channel 110, the upper end surface of the clamping block 103, the deformation block 108, and the top wall of the locking hole 106 together form a locking channel 112 connected to the first sliding channel 110, and the locking channel 112 is located on the side away from the locking internal thread 105, and the locking rod 4 is slidably arranged in the first sliding channel 110, and the bottom wall of the first sliding channel 110 is inclined, and the bottom wall of the first sliding channel 110 extends downward in a direction away from the locking channel 112, and one end of the clamping block 103 forms a limiting portion 113 higher than the first sliding channel 110, and the limiting portion 113 is located at the connection point of the first sliding channel 110, the locking hole 106, and the locking channel 112.

[0039] For better results, a drive spring 6 is installed in the first sliding channel 110, and the locking rod 4 is provided with a limiting slide 7. One end of the drive spring 6 is connected to the limiting slide 7, and the other end of the drive spring 6 is connected to the inner wall of the first sliding channel 110. When the lock nut is installed so that the locking internal thread 105 is close to the bolt, the elasticity of the drive spring 6 allows one end of the locking rod 4 to be inserted into the locking channel 112, thereby achieving locking.

[0040] For greater effectiveness, the first nut body 1 further includes a sleeve 102 fixedly connected to the first hexagonal block 101. The sleeve 102 is located on the upper end surface of the first hexagonal block 101 and defines a mounting hole 114 communicating with the first threaded connection hole 104. An anti-loosening spring 3 is mounted within the mounting hole 114. Once installed, the anti-loosening spring 3 elastically deforms in both the thread pitch diameter and the thread pitch, generating a clamping force that further prevents the first nut body 1 from loosening, achieving low-torque / no-torque anti-loosening properties.

[0041] For better results, the second nut body 2 is further included. The second nut body 2 has a second hexagonal block 201. The second hexagonal block 201 is provided with a second connecting threaded hole 203. The second hexagonal block 201 is provided with a sleeve groove 202. The second connecting threaded hole 203 and the sleeve groove 202 are sequentially connected from top to bottom and pass through the second hexagonal block 201. The second hexagonal block 201 is sleeved on the sleeve 102 through the sleeve groove 202. The second hexagonal block 201 is threadedly connected to the bolt via the second connecting threaded hole 203.

[0042] During use, when the first nut body 1 is installed, it rotates along the bolt and approaches the mounting panel. When the lower end surface of the clamping block 103 abuts the mounting panel, the mounting panel squeezes the lower end surface of the clamping block 103, causing the deformation block 108 to deform, forcing the clamping blocks 103 closer together (by tilting the lower end surfaces of the clamping blocks 103 or abutting the outer sides of the clamping blocks 103 against the inner walls of the locking holes 106, the clamping blocks 103 are restricted to moving closer together). The locking internal threads 105 then tightly clamp the bolt, preventing the first nut body 1 from loosening. The first nut body 1 is self-locking during installation, providing strong anti-loosening properties.

[0043] Before the anti-loosening nut is installed, one end of the locking rod 4 abuts against the limiting portion 113 to prevent the locking rod 4 from being inserted into the locking channel 112. When the anti-loosening nut is installed so that the locking internal thread 105 is close to the bolt, the limiting portion 113 moves downward, and the locking channel 112 is enlarged. At this time, one end of the locking rod 4 can be inserted into the locking channel 112 to prevent the clamping block 103 from resetting, so that the locking clamping force of the clamping block 103 on the bolt is more stable. The locking rod 4 can be inserted into the locking channel 112 manually, or it can be automatically inserted after the anti-loosening nut is installed using elastic members such as springs. When the anti-loosening nut needs to be removed, the locking rod 4 can be manually disengaged from the locking channel 112 to unlock it, and then the anti-loosening nut can be rotated to remove it.

[0044] Furthermore, the anti-loosening nut also includes a second nut body 2. After the first nut body 1 is installed, the second nut body 2 is installed, and the second nut body 2 is used to press against the first nut body 1 to achieve further anti-loosening. The second hexagonal block 201 is sleeved on the sleeve 102 through the sleeve groove 202 to achieve the sleeve connection between the second nut body 2 and the first nut body, and the second hexagonal block 201 and the first hexagonal block 101 abut against each other. When the first nut body 1 is vibrated, due to the characteristic of the anti-loosening spring 3 in the threaded connection pair that it is always "radially contracted", the first nut body 1 will tend to move in the direction of tightening the thread, and the first nut body 1 will automatically lock under vibration.

[0045] The present invention organically combines mechanical structure innovation with elastic elements, effectively improving the anti-loosening performance while retaining the operational convenience of traditional hexagonal nuts, and has high reliability, long life and easy maintenance. Example 3

[0046] like Figure 1-5As shown, a locking nut includes a first nut body 1, the first nut body 1 including a first hexagonal block 101, a first connecting threaded hole 104 and a locking hole 106 are formed inside the first hexagonal block 101, the connection between the first connecting threaded hole 104 and the locking hole 106 forms a hole shoulder, clamping blocks 103 are arranged circumferentially spaced apart along the axis of the locking hole 106, a deformation block 108 with elastic deformation capability is arranged between the clamping blocks 103 and the hole shoulder, and a separation gap 107 is formed between adjacent clamping blocks 103, each of the clamping blocks 103 having an inwardly concave arc wall with a locking internal thread 105 provided on the inner side of the arc wall, and the lower end surface of the clamping block 103 protrudes from the lower end surface of the first hexagonal block 101. The separation gap 107 provides a clearance for the clamping blocks 103 to approach each other and avoid interference. When the deformation block 108 is deformed so that the clamping blocks 103 are close to each other, the locking internal threads 105 of the clamping blocks 103 abut against the external threads of the bolt, thereby achieving clamping and locking.

[0047] For better effect, the first connecting threaded hole 104 and the locking hole 106 are connected in sequence from top to bottom and pass through the upper and lower end surfaces of the first hexagonal block 101 . The diameter of the first connecting threaded hole 104 is smaller than that of the locking hole 106 .

[0048] For better results, the locking hole 106 is shaped as a circular hole, and the clamping block 103 is shaped as an arc block. The clamping block 103 has an outwardly convex outer arc surface, which is spaced apart from the inner wall of the locking hole 106. The lower end surface of the clamping block 103 is an abutting inclined surface 109, which is inclined downward in the direction close to the axis of the locking hole 106. When the abutting inclined surface 109 abuts the installation panel, the clamping block 103 can approach the axis of the locking hole 106 and tightly clamp the bolt using the locking internal thread 105.

[0049] For better effect, the first nut body 1 also includes a locking rod 4, the first hexagonal block 101 is provided with a first sliding channel 110, the upper end surface of the clamping block 103, the deformation block 108, and the top wall of the locking hole 106 together form a locking channel 112 connected to the first sliding channel 110, and the locking channel 112 is located on the side away from the locking internal thread 105, and the locking rod 4 is slidably arranged in the first sliding channel 110, and the bottom wall of the first sliding channel 110 is inclined, and the bottom wall of the first sliding channel 110 extends downward in a direction away from the locking channel 112, and one end of the clamping block 103 forms a limiting portion 113 higher than the first sliding channel 110, and the limiting portion 113 is located at the connection point of the first sliding channel 110, the locking hole 106, and the locking channel 112.

[0050] For better results, a drive spring 6 is installed in the first sliding channel 110, and the locking rod 4 is provided with a limiting slide 7. One end of the drive spring 6 is connected to the limiting slide 7, and the other end of the drive spring 6 is connected to the inner wall of the first sliding channel 110. When the lock nut is installed so that the locking internal thread 105 is close to the bolt, the elasticity of the drive spring 6 allows one end of the locking rod 4 to be inserted into the locking channel 112, thereby achieving locking.

[0051] For greater effectiveness, the first nut body 1 further includes a sleeve 102 fixedly connected to the first hexagonal block 101. The sleeve 102 is located on the upper end surface of the first hexagonal block 101 and defines a mounting hole 114 communicating with the first threaded connection hole 104. An anti-loosening spring 3 is mounted within the mounting hole 114. Once installed, the anti-loosening spring 3 elastically deforms in both the thread pitch diameter and the thread pitch, generating a clamping force that further prevents the first nut body 1 from loosening, achieving low-torque / no-torque anti-loosening properties.

[0052] For better results, the second nut body 2 is further included. The second nut body 2 has a second hexagonal block 201. The second hexagonal block 201 is provided with a second connecting threaded hole 203. The second hexagonal block 201 is provided with a sleeve groove 202. The second connecting threaded hole 203 and the sleeve groove 202 are sequentially connected from top to bottom and pass through the second hexagonal block 201. The second hexagonal block 201 is sleeved on the sleeve 102 through the sleeve groove 202. The second hexagonal block 201 is threadedly connected to the bolt via the second connecting threaded hole 203.

[0053] For better effect, a second sliding channel 111 is opened inside the first hexagonal block 101, and the second sliding channel 111 extends from top to bottom and is connected to the first sliding channel 110. A push rod 5 is slidably provided inside the second sliding channel 111, and the upper end of the push rod 5 protrudes from the upper end surface of the first hexagonal block 101, and the lower end of the push rod 5 has a second push inclined surface 501, and the locking rod 4 has a first push inclined surface 401, and the first push inclined surface 401 is located in the path where the second push inclined surface 501 of the push rod 5 moves downward, and a limiting slide 7 is provided on the push rod 5, and the limiting slide 7 is slidably installed in the second sliding channel 111, and the push rod 5 is sleeved with a driving spring 6, which connects the limiting slide 7 and the first hexagonal block 101, and the driving spring 6 is in a compressed state when the push rod 5 slides downward.

[0054] A method for preventing loosening, comprising the following steps: S10: After the bolt passes through the mounting panel, the first nut body 1 is threadedly connected to the bolt until the first hexagonal block 101 of the first nut body 1 and the rod head of the bolt jointly clamp the mounting panel; S20, the mounting panel and the lower end surface of the clamping block 103 are pressed against each other, causing the deformation block 108 to deform. The clamping blocks 103 move closer to each other and use the locking internal threads 105 to tightly clamp the bolt to prevent the first nut body 1 from loosening; S30, after the clamping blocks 103 are close to each other and the locking bolts, the locking rod 4 slides into the locking channel 112 to prevent the clamping blocks 103 from resetting, thereby improving the locking stability.

[0055] The S30 also includes installing the second nut body 2, rotating the second hexagonal block 201 of the second nut body 2 to be installed on the bolt, and the second hexagonal block 201 and the first hexagonal block 101 abut against each other to achieve further anti-loosening. When the second hexagonal block 201 is installed on the bolt and abuts against the upper end face of the first hexagonal block 101, the lower end face of the second hexagonal block 201 abuts against the push rod 5, causing the push rod 5 to slide downward, and the push rod 5 pushes the locking rod 4 to insert into the locking channel 112.

[0056] During use, when the first nut body 1 is installed, it rotates along the bolt and approaches the mounting panel. When the lower end surface of the clamping block 103 abuts the mounting panel, the mounting panel squeezes the lower end surface of the clamping block 103, causing the deformation block 108 to deform, forcing the clamping blocks 103 closer together (by tilting the lower end surfaces of the clamping blocks 103 or abutting the outer sides of the clamping blocks 103 against the inner walls of the locking holes 106, the clamping blocks 103 are restricted to moving closer together). The locking internal threads 105 then tightly clamp the bolt, preventing the first nut body 1 from loosening. The first nut body 1 is self-locking during installation, providing strong anti-loosening properties.

[0057] Before the anti-loosening nut is installed, one end of the locking rod 4 abuts against the limiting portion 113 to prevent the locking rod 4 from being inserted into the locking channel 112. When the anti-loosening nut is installed so that the locking internal thread 105 is close to the bolt, the limiting portion 113 moves downward, and the locking channel 112 is enlarged. At this time, one end of the locking rod 4 can be inserted into the locking channel 112 to prevent the clamping block 103 from resetting, so that the locking clamping force of the clamping block 103 on the bolt is more stable. The locking rod 4 can be inserted into the locking channel 112 manually, or it can be automatically inserted after the anti-loosening nut is installed using elastic members such as springs. When the anti-loosening nut needs to be removed, the locking rod 4 can be manually disengaged from the locking channel 112 to unlock it, and then the anti-loosening nut can be rotated to remove it.

[0058] Furthermore, the anti-loosening nut also includes a second nut body 2. After the first nut body 1 is installed, the second nut body 2 is installed, and the second nut body 2 is used to press against the first nut body 1 to achieve further anti-loosening. The second hexagonal block 201 is sleeved on the sleeve 102 through the sleeve groove 202 to achieve the sleeve connection between the second nut body 2 and the first nut body, and the second hexagonal block 201 and the first hexagonal block 101 abut against each other. When the first nut body 1 is vibrated, due to the characteristic of the anti-loosening spring 3 in the threaded connection pair that it is always "radially contracted", the first nut body 1 will tend to move in the direction of tightening the thread, and the first nut body 1 will automatically lock under vibration.

[0059] Furthermore, a second sliding channel 111 is provided on the first hexagonal block 101. When the second hexagonal block 201 is installed on the bolt and abuts against the upper end face of the first hexagonal block 101, the lower end face of the second hexagonal block 201 abuts against the push rod 5, causing the push rod 5 to slide downward, and the push rod 5 pushes the locking rod 4 to insert into the locking channel 112. A limiting slide 7 is provided on the push rod 5, and the limiting slide 7 is slidably installed in the second sliding channel 111. The push rod 5 is sleeved with a driving spring 6, which connects the limiting slide 7 and the first hexagonal block 101. When the push rod 5 slides downward, the driving spring 6 is compressed. During disassembly, first remove the second hexagonal block 201 of the second nut body 2, and use the driving spring 6 on the push rod 5 to automatically reset the push rod 5 upward. After the locking rod 4 is no longer limited by the push rod 5, it can be pulled out. Finally, disassemble the first hexagonal block 101 of the first nut body 1 to complete the disassembly of the anti-loosening nut.

[0060] The present invention organically combines mechanical structure innovation with elastic elements, thereby effectively improving the anti-loosening performance while retaining the operational convenience of traditional hexagonal nuts, and has high reliability, long life and easy maintenance.

Claims

1. A locknut, comprising a first nut body, characterized in that: The first nut body includes a first hexagonal block, a first connecting threaded hole and a locking hole are provided inside the first hexagonal block, a hole shoulder is formed at the connection point between the first connecting threaded hole and the locking hole, clamping blocks are arranged at intervals along the axis of the locking hole, a deformation block with elastic deformation ability is arranged between the clamping block and the hole shoulder, and a separation gap is formed between adjacent clamping blocks, the clamping block has an inwardly concave arc wall, a locking internal thread is provided on the inner side of the arc wall, and the lower end face of the clamping block protrudes from the lower end face of the first hexagonal block.

2. A lock nut according to claim 1, characterized in that: The first connecting threaded hole and the locking hole are connected in sequence from top to bottom and pass through the upper and lower end surfaces of the first hexagonal block. The diameter of the first connecting threaded hole is smaller than the diameter of the locking hole.

3. A lock nut according to claim 2, characterized in that: The locking hole is shaped as a circular hole, and the clamping block is shaped as an arc block. The clamping block has an outer arc surface that convexes outward, and the outer arc surface is spaced apart from the inner wall of the locking hole. The lower end face of the clamping block is an abutment slope, and the abutment slope is inclined downward in the direction close to the axis of the locking hole.

4. The anti-loosening nut according to claim 1, characterized in that: The first nut body also includes a locking rod, the first hexagonal block is provided with a first sliding channel, the upper end surface of the clamping block, the deformation block, and the top wall of the locking hole together form a locking channel connected to the first sliding channel, the locking channel is located on the side away from the locking internal thread, the locking rod is slidably arranged in the first sliding channel, the bottom wall of the first sliding channel is inclined, and the bottom wall of the first sliding channel extends downward in a direction away from the locking channel, one end of the clamping block forms a limiting portion higher than the first sliding channel, and the limiting portion is located at the connection point of the first sliding channel, the locking hole, and the locking channel.

5. A lock nut according to claim 4, characterized in that: A driving spring is installed in the first sliding channel, and the locking rod is provided with a limiting slide. One end of the driving spring is connected to the limiting slide, and the other end of the driving spring is connected to the inner wall of the first sliding channel.

6. The anti-loosening nut according to claim 5, characterized in that: The first nut body also includes a sleeve fixedly connected to the first hexagonal block, the sleeve is located on the upper end surface of the first hexagonal block, the sleeve is provided with a mounting hole connected to the first connecting threaded hole, and an anti-loosening spring is installed in the mounting hole.

7. The anti-loosening nut according to claim 6, characterized in that: It also includes a second nut body, the second nut body has a second hexagonal block, the second hexagonal block is provided with a second connecting threaded hole, the second hexagonal block is provided with a sleeve groove, the second connecting threaded hole and the sleeve groove are connected in sequence from top to bottom and pass through the second hexagonal block, and the second hexagonal block is sleeved on the sleeve through the sleeve groove.

8. The anti-loosening nut according to claim 7, characterized in that: A second sliding channel is provided inside the first hexagonal block, and the second sliding channel extends from top to bottom and is connected to the first sliding channel. A push rod is slidably provided inside the second sliding channel, and the upper end of the push rod protrudes from the upper end surface of the first hexagonal block, and the lower end of the push rod has a second push inclined surface. The locking rod has a first push inclined surface, and the first push inclined surface is located in the path where the second push inclined surface of the push rod moves downward. A limiting slide is provided on the push rod, and the limiting slide is slidably installed in the second sliding channel. The push rod sleeve is provided with a driving spring, and the driving spring is connected to the limiting slide and the first hexagonal block. When the push rod slides downward, the driving spring is in a compressed state.

9. A method for preventing loosening, based on the anti-loosening nut according to any one of claims 1 to 8, characterized in that: The following steps are involved: S10: After the bolt passes through the mounting panel, the first nut body is threadedly connected to the bolt until the first hexagonal block of the first nut body and the rod head of the bolt jointly clamp the mounting panel; S20, the mounting panel and the lower end surface of the clamping block are pressed against each other, causing the deforming block to deform. The clamping blocks move closer to each other and tightly clamp the bolt using the locking internal thread to prevent the first nut body from loosening. S30, after the clamping blocks are close to the locking bolts, the locking rod 4 slides into the locking channel to prevent the clamping blocks from resetting and improve the locking stability.

10. The anti-loosening method according to claim 9, characterized in that: The S30 further includes installing a second nut body, rotating the second hexagonal block of the second nut body to be installed on the bolt, the second hexagonal block and the first hexagonal block abutting against each other, when the second hexagonal block is installed on the bolt and abuts against the upper end face of the first hexagonal block, the lower end face of the second hexagonal block abuts against the push rod, causing the push rod to slide downward, and the push rod pushes the locking rod to insert into the locking channel.

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