Nut looseness detection device

Abstract

The utility model is suitable for the technical field of detection equipment, and provides a nut looseness detection device, which comprises a connecting sleeve and a detection assembly, the connecting sleeve is of a hollow structure, one end of the connecting sleeve is used for being connected with a nut, and the other end of the connecting sleeve is used for installing a detection assembly. The detection assembly is used for detecting the magnetic field direction of the magnet at the tail end of the bolt so as to determine whether the nut and the bolt loosen or not. According to the utility model, the mounting sleeve is detachably connected with the connecting sleeve, so that the connecting sleeve matched with a nut and a bolt to be detected can be conveniently replaced, and the detection chip is arranged in the mounting sleeve connected with the connecting sleeve; the magnetic field direction of the bolt positioned on the connecting sleeve is detected through the detection chip so as to detect whether the nut and the bolt are loosened or not, and the problems that in the nut and bolt detection and maintenance process, steps are tedious, time is wasted, and the maintenance efficiency is low are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, and in particular relates to a detection device for loosening of nuts. Background Art

[0002] The coordinated tightening of nuts and bolts is widely used in many fields such as mechanical engineering, chemical industry, wind power generation, railway bridges and building structures, such as connecting beams, piers, plates and other components on bridges to ensure the stability and integrity of the structure and ensure the safe operation of the bridge.

[0003] The bolt connection between the nut and the bolt is a detachable connection. The load on the bolt will fluctuate during use. Therefore, the nut is likely to loosen after long-term use. In the application scenarios of nuts and bolts such as bridges and other building structures, mechanical equipment, or wind power base stations, the nuts and bolts are constantly subjected to external forces during use, causing vibrations, which in turn causes the nuts to loosen.

[0004] In the prior art, to check whether the nuts and bolts are loose, in most cases, inspection personnel regularly inspect and tighten each nut with a wrench. However, due to the large number of nuts, this process requires a lot of manpower and material resources to reinforce each nut, or an intelligent detection nut is set on the original nut and installed on each original nut. Once the original nut is loose, the intelligent detection nut will sound an alarm to facilitate timely maintenance by the inspection personnel. However, the intelligent detection nut needs to be installed on each original nut, and when the inspection personnel perform maintenance, they need to remove the original nut, tighten it into place, and then install and reset the intelligent detection nut, which is also time-consuming. The whole process is cumbersome and time-consuming, and the maintenance efficiency is low. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a device for detecting loose nuts, aiming to solve the problem that when the inspector performs maintenance, he needs to remove the original nut, tighten the original nut into place, and then install and reset the nut with intelligent detection, which is also time-consuming. The whole process is cumbersome and time-consuming, and the maintenance efficiency is low.

[0006] The embodiment of the utility model is implemented as follows: a nut loosening detection device, the nut loosening detection device comprising: a connecting sleeve and a detection component;

[0007] The connecting sleeve is a hollow structure, one end of the connecting sleeve is used to connect with the nut, and the other end is used to detect the installation of the component;

[0008] The detection assembly is used to detect the magnetic field direction of the magnet at the end of the bolt so as to determine whether there is looseness between the nut and the bolt.

[0009] Preferably, the connecting sleeve is provided with a mounting portion, the mounting portion is provided with a mounting protrusion, and the mounting protrusion is used to connect with the detection component.

[0010] Preferably, the detection component includes a mounting sleeve, which is configured to be cylindrical for installing the detection device, and a mounting hole is provided on the outer wall of the mounting sleeve. The mounting hole cooperates with the mounting protrusion to facilitate the connection between the connecting sleeve and the detection component and the bolts are close to the detection chip, and the mounting hole and the mounting protrusion are detachably connected.

[0011] Preferably, the connecting sleeve is also provided with a first positioning portion and a second positioning portion, the first positioning portion is located on the second positioning portion, the first positioning portion is used to connect with the nut, the first positioning portion is set as a polygonal structure and the bottom surface is connected to the second positioning portion, the inner diameter of the first positioning portion is larger than the inner diameter of the second positioning portion; the second positioning portion is set as a columnar structure and one end is located at the center position of the first positioning portion.

[0012] Preferably, the mounting portion is arranged on the outer wall surface of the connecting sleeve and is located on the second positioning portion. The mounting portion is also provided with a positioning protrusion, a rectangular groove and a positioning hole. The positioning protrusion is an arc-shaped protrusion extending to one side from the outer wall surface of the connecting sleeve. The positioning protrusion is used for installing the mounting sleeve. One end of the rectangular groove is connected to the lower end surface of the positioning protrusion. The rectangular groove is used to connect with the mounting sleeve so that the connecting sleeve and the mounting sleeve are connected. The positioning hole is used to connect with the mounting protrusion.

[0013] Preferably, the mounting protrusion is an irregular protrusion extending to one side of the wall surface of the positioning hole, and the mounting protrusion is provided with a connecting part and a fixing part, one end of the connecting part is connected to the wall surface of the positioning hole and the front face of the connecting part is not higher than the front face of the positioning protrusion, and the fixing part is connected to the other end of the connecting part and the front face of the fixing part is higher than the front face of the positioning protrusion so as to cooperate with the mounting hole on the connecting sleeve so that the connecting sleeve and the mounting sleeve are connected.

[0014] Preferably, the inner diameter of the mounting sleeve is not smaller than the outer diameter of the second positioning portion of the connecting sleeve so that the mounting hole of the mounting sleeve can position the mounting protrusion on the connecting sleeve, and the mounting protrusion cooperates with the mounting hole so that the front side of the mounting protrusion is lower than the outer wall surface of the mounting sleeve, and the fixing portion of the mounting protrusion is pressed so that the front side of the mounting protrusion is lower than the inner wall surface of the mounting sleeve so as to facilitate the removal of the connecting sleeve from the mounting sleeve.

[0015] Preferably, a first thread is arranged on the outer wall surface of the mounting sleeve; a sealing shell is arranged on the bottom of the mounting sleeve and a second thread is arranged on the inner wall surface of the sealing shell to cooperate with the first thread on the outer wall surface of the mounting sleeve so that the mounting sleeve is connected to the sealing shell, and the sealing shell is used to prevent impurities from entering the interior of the mounting sleeve and affecting the detection of the detection chip.

[0016] Preferably, a first mounting position and a second mounting position are arranged on the inner wall surface of the mounting sleeve, and a strip protrusion is arranged at the first mounting position, and the strip protrusion cooperates with the rectangular groove on the connecting sleeve to connect the connecting sleeve and the mounting sleeve, and the width of the strip protrusion is not greater than the groove width of the rectangular groove; a plurality of L-shaped protrusions and fixed protrusions are arranged at the second mounting position, and the L-shaped protrusions and fixed protrusions are used to install the detection component.

[0017] Preferably, the detection component also includes a main control board, a battery pack and a protective cover. The main control board is electrically connected to the battery pack and the detection chip. The main control board and the battery pack are installed on fixed protrusions at the second mounting position. The detection chip is installed below the main control board and the battery pack. The detection chip detects the direction of the magnetic field at the end of the bolt positioned by the connecting sleeve to determine whether the nut and the bolt are loose. The protective cover is installed at the second mounting position of the mounting sleeve. The lower bottom surface of the protective cover is flush with the lower end surface of the mounting sleeve. The protective cover is used to prevent the detection chip from being affected by external electromagnetic radiation and affecting the detection result of the detection chip.

[0018] The embodiment of the utility model provides a device for detecting loose nuts. The utility model sets a positioning device for a cylindrical connecting sleeve that is compatible with the nut and bolt to be detected, and directly sleeves the connecting sleeve on the nut. The detection component connected to the connecting sleeve detects the direction of the magnetic field at the end of the bolt on the connecting sleeve to detect whether there is looseness between the nut and the bolt, thereby solving the problems of complicated steps, time-consuming, and low maintenance efficiency in the process of detecting and repairing nuts and bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional structural diagram of a nut loosening detection device provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of a connecting sleeve in a nut loosening detection device provided by an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the structure of a detection component in a nut loosening detection device provided by an embodiment of the utility model;

[0022] Figure 4 A schematic structural diagram of a mounting sleeve and a protective cover in a nut loosening detection device provided in an embodiment of the utility model.

[0023] In the accompanying drawings: 1. connecting sleeve; 11. mounting protrusion; 12. first positioning portion; 13. second positioning portion; 14. positioning hole; 15. positioning protrusion; 16. rectangular groove; 2. detection component; 21. mounting sleeve; 211. mounting hole; 212. strip protrusion; 22. sealing shell; 23. detection chip; 231. protective cover. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0026] like Figure 1-4 As shown, it is a structural diagram of a nut loosening detection device provided by an embodiment of the utility model, comprising: a connecting sleeve 1 and a detection component 2;

[0027] The connecting sleeve 1 is a hollow structure, one end of the connecting sleeve 1 is used to connect with the nut, and the other end is used to detect the installation of the component 2;

[0028] The detection assembly 2 is used to detect the magnetic field direction of the magnet at the end of the bolt so as to determine whether there is looseness between the nut and the bolt.

[0029] The connecting sleeve 1 is provided with a mounting portion, and the mounting portion is provided with a mounting protrusion 11 . The mounting protrusion 11 is used to connect with the detection component 2 .

[0030] The detection component 2 includes a mounting sleeve 21, which is configured to be cylindrical for installing the detection device. A mounting hole 211 is provided on the outer wall of the mounting sleeve 21. The mounting hole 211 cooperates with the mounting protrusion 11 to facilitate the connection between the connecting sleeve 1 and the detection component 2 and the bolts approaching the detection chip 23. The mounting hole 211 and the mounting protrusion 11 are detachably connected.

[0031] In the embodiments of the present invention, preferably, the nut loosening detection device can be applied to the detection and maintenance of bridge building structures, base stations, and other scenarios where bolts and nuts are easily vibrated by external forces and nuts become loose. The nut loosening detection device can detect whether the nuts and bolts are loose, and then the loose nuts and bolts are inspected and repaired, thereby avoiding the maintenance personnel from tightening each nut and bolt during inspection and maintenance, thereby reducing manpower and time costs. The nut loosening detection device is mainly composed of a connecting sleeve 1 and a detection component 2. The connecting sleeve 1 is configured to be a hollow cylindrical structure to facilitate the positioning of the bolts and nuts in the cavity structure of the connecting sleeve 1. The connecting sleeve 1 and the detection component 2 are connected to the connecting sleeve 1. The mounting sleeve 21 is connected by the matching of the mounting protrusion 11 and the mounting hole 211, so that the detection chip 23 inside the mounting sleeve 21 can detect the bolt positioned on the connecting sleeve 1. When it is detected that the magnetic field direction at the end of the bolt is different from the magnetic field direction of the bolt in the tightened state, it means that the current connection between the nut and the bolt is loose and needs to be tightened and repaired in time, thereby improving the overall maintenance efficiency. The nuts and bolts can be directly inserted into the hollow part of the connecting sleeve 1 for detection, and the detection steps are simple. The connecting sleeve 1 and the mounting sleeve 21 are arranged to be detachably connected to facilitate the replacement of connecting sleeves 1 of different specifications so that the connecting sleeve 1 can be adapted to nuts and bolts of the same specifications.

[0032] In one example of the utility model, the utility model sets a positioning for a cylindrical connecting sleeve 1 that is compatible with the nut and bolt to be detected, and directly sets the connecting sleeve 1 on the nut. The detection component 2 connected to the connecting sleeve 1 detects the direction of the magnetic field at the end of the bolt on the connecting sleeve 1 to detect whether there is looseness between the nut and the bolt, thereby solving the problems of complicated steps, time-consuming, and low maintenance efficiency in the process of detecting and repairing nuts and bolts.

[0033] like Figure 1-2 As shown, as a preferred embodiment of the utility model, the connecting sleeve 1 is further provided with a first positioning portion 12 and a second positioning portion 13, the first positioning portion 12 is located on the second positioning portion 13, the first positioning portion 12 is used to connect with the nut, the first positioning portion 12 is arranged as a polygonal structure and the bottom surface is connected with the second positioning portion 13, the inner diameter of the first positioning portion 12 is larger than the inner diameter of the second positioning portion 13; the second positioning portion 13 is arranged as a columnar structure and one end is located at the center position of the first positioning portion 12.

[0034] In the embodiment of the utility model, preferably, a first positioning portion 12 and a second positioning portion 13 can be provided inside the hollow structure of the connecting sleeve 1. The first positioning portion 12 is set to a polygonal groove structure with a certain thickness, which can be set to be similar to a hexagonal groove and adapted to the specifications of the nut currently being detected. The second positioning portion 13 connected to the first positioning portion 12 can be a cylindrical cavity to facilitate the positioning of the bolt so that the nut and bolt can be directly mounted on the connecting sleeve 1 during detection, and the detection chip 23 can also be directly removed after the detection is completed.

[0035] like Figure 1-2 As shown, as a preferred embodiment of the utility model, the mounting portion is arranged on the outer wall surface of the connecting sleeve 1 and is located on the second positioning portion 13. The mounting portion is also provided with a positioning protrusion 15, a rectangular groove 16 and a positioning hole 14. The positioning protrusion 15 is an arc-shaped protrusion extending toward one side of the outer wall of the connecting sleeve 1. The positioning protrusion 15 is used for installing the mounting sleeve 21. One end of the rectangular groove 16 is connected to the lower end surface of the positioning protrusion 15. The rectangular groove 16 is used to connect with the mounting sleeve 21 so that the connecting sleeve 1 and the mounting sleeve 21 are connected. The positioning hole 14 is used to connect with the mounting protrusion 11.

[0036] In the embodiment of the utility model, preferably, the mounting portion on the connecting sleeve 1 is located on the outer wall surface of the cylindrical second positioning portion 13 of the connecting sleeve 1. According to the shape of the second positioning portion 13 of the connecting sleeve 1, there may be two groups of positioning protrusions 15 provided on the mounting portion, and two groups of rectangular grooves 16 and positioning holes 14 are also provided. The two groups of unconnected arc-shaped positioning protrusions 15 are separated by two groups of positioning holes 14, and the two groups of rectangular grooves 16 are respectively located below the two groups of positioning protrusions 15.

[0037] like Figure 1-2 As shown, as a preferred embodiment of the utility model, the mounting protrusion 11 is an irregular protrusion extending to one side of the wall of the positioning hole 14, and the mounting protrusion 11 is provided with a connecting portion and a fixing portion, one end of the connecting portion is connected to the wall of the positioning hole 14 and the front of the connecting portion is not higher than the front of the positioning protrusion 15, and the fixing portion is connected to the other end of the connecting portion and the front of the fixing portion is higher than the front of the positioning protrusion 15 so as to cooperate with the mounting hole 211 on the connecting sleeve 1 so that the connecting sleeve 1 is connected to the mounting sleeve 21.

[0038] In the embodiment of the utility model, preferably, the mounting protrusion 11 is an irregular protrusion extending toward one side of the wall of the positioning hole 14. Two groups of mounting protrusions 11 can be provided. The portion of the mounting protrusion 11 connected to the positioning hole 14 is a connecting portion. The connecting portion can be a strip structure with a certain length, and its front side can be slightly higher than the outer wall surface of the connecting sleeve 1 and lower than the front side of the positioning protrusion 15. The fixing portion is located at the end of the mounting protrusion 11. The fixing portion can be a disc-shaped structure, and the fixing portion has a certain thickness and the thickness is greater than the thickness of the positioning portion so as to cooperate with the mounting hole 211 on the mounting sleeve 21, so that the connecting sleeve 1 is connected to the mounting sleeve 21.

[0039] like Figure 1-4 As shown, as a preferred embodiment of the utility model, the inner diameter of the mounting sleeve 21 is not less than the outer diameter of the second positioning portion 13 of the connecting sleeve 1 so that the mounting hole 211 of the mounting sleeve 21 can position the mounting protrusion 11 on the connecting sleeve 1, and the mounting protrusion 11 cooperates with the mounting hole 211 so that the front side of the mounting protrusion 11 is lower than the outer wall surface of the mounting sleeve 21, and the fixing portion of the mounting protrusion 11 is pressed so that the front side of the mounting protrusion 11 is lower than the inner wall surface of the mounting sleeve 21 so as to facilitate the removal of the connecting sleeve 1 from the mounting sleeve 21.

[0040] In the embodiment of the utility model, preferably, the mounting sleeve 21 can be a cylindrical structure with a hollow cavity. The connecting sleeve 1 is installed on the cavity structure of the mounting sleeve 21 and cooperates with the mounting protrusion 11 on the connecting sleeve 1 through the mounting hole 211. The mounting protrusion 11 can be pressed so that the front side of the mounting protrusion 11 is lower than the inner wall surface of the mounting sleeve 21 so that it can be removed to facilitate the replacement of the connecting sleeve 1 that is compatible with the nut and bolt.

[0041] like Figure 1-4 As shown, as a preferred embodiment of the utility model, a first thread is arranged on the outer wall surface of the mounting sleeve 21; a sealing shell 22 is arranged on the bottom of the mounting sleeve 21 and a second thread is arranged on the inner wall surface of the sealing shell 22 to cooperate with the first thread on the outer wall surface of the mounting sleeve 21 so that the mounting sleeve 21 is connected to the sealing shell 22, and the sealing shell 22 is used to prevent impurities from entering the interior of the mounting sleeve 21 and affecting the detection of the detection chip 23.

[0042] In an embodiment of the utility model, preferably, a sealing shell 22 can be provided at one end of the mounting sleeve 21 for threaded connection to prevent impurities from entering the interior of the mounting sleeve 21 and affecting the detection of the detection chip 23. One end of the mounting sleeve 21 is connected to the connecting sleeve 1 through the mounting hole 211, and the other end is connected to the sealing shell 22 through a first thread.

[0043] like Figure 1-4As shown, as a preferred embodiment of the utility model, the inner wall surface of the mounting sleeve 21 is provided with a first mounting position and a second mounting position, the first mounting position is provided with a strip protrusion 212, the strip protrusion 212 cooperates with the rectangular groove 16 on the connecting sleeve 1 to connect the connecting sleeve 1 with the mounting sleeve 21, and the width of the strip protrusion 212 is not greater than the groove width of the rectangular groove 16; the second mounting position is provided with a plurality of L-shaped protrusions and fixed protrusions, and the L-shaped protrusions and fixed protrusions are used to install the detection component 2.

[0044] In the embodiment of the utility model, preferably, a first mounting position is set on the inner wall surface of the mounting sleeve 21 mainly by cooperating with the rectangular groove 16 on the connecting sleeve 1 through the strip protrusion 212 to facilitate positioning of the connecting sleeve 1, and a second mounting position is set mainly by installing the detection component 2 through the L-shaped protrusion and the fixed protrusion.

[0045] like Figure 1-4 As shown, as a preferred embodiment of the utility model, the detection component 2 also includes a main control board, a battery pack and a protective cover 231. The main control board is electrically connected to the battery pack and the detection chip 23. The main control board and the battery pack are installed on the fixed protrusions of the second installation position. The detection chip 23 is installed below the main control board and the battery pack. The detection chip 23 detects the direction of the magnetic field at the end of the bolt positioned by the connecting sleeve 1 to determine whether the nut and the bolt are loose; the protective cover 231 is installed on the second installation position of the mounting sleeve 21, and the lower bottom surface of the protective cover 231 is flush with the lower end surface of the mounting sleeve 21. The protective cover 231 is used to prevent the detection chip 23 from being affected by external electromagnetic radiation and affecting the detection result of the detection chip 23.

[0046] In the embodiment of the utility model, preferably, the detection component 2 is mainly provided with a detection chip 23, a main control board, a battery pack and a protective cover 231. The main control board is mainly used to control the detection chip 23 to detect the bolts. The battery pack is used to provide power to the detection chip 23. The main control board, the battery pack and the detection chip 23 can be installed inside the mounting sleeve 21 through L-shaped protrusions and fixed protrusions, and the protective cover 231 can be provided with a U-shaped groove and the L-shaped protrusion to cooperate with the protective cover 231 so that the protective cover 231 is installed in place and its lower bottom surface is flush with the lower end surface of the mounting sleeve 21. The detection chip 23 can be the same as the working principle of the magnetic field tester, which is mainly to detect the direction of the magnetic field at the end of the bolt to determine whether the current nut and bolt are loose. A magnet sheet can also be provided at the end of the bolt to facilitate the detection chip 23 to detect the magnetic field direction of the bolt.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nut loosening detection device, characterized in that: The nut loosening detection device comprises: a connecting sleeve and a detection component; The connecting sleeve is a hollow structure, one end of the connecting sleeve is used to connect with the nut, and the other end is used to detect the installation of the component; The detection assembly is used to detect the magnetic field direction of the magnet at the end of the bolt so as to determine whether there is looseness between the nut and the bolt.

2. The nut loosening detection device according to claim 1, characterized in that: The connecting sleeve is provided with a mounting portion, the mounting portion is provided with a mounting protrusion, and the mounting protrusion is used to connect with the detection component.

3. The nut loosening detection device according to claim 2, characterized in that: The detection component includes a mounting sleeve, which is configured to be cylindrical for mounting the detection device. A mounting hole is provided on the outer wall of the mounting sleeve. The mounting hole cooperates with a mounting protrusion to facilitate the connection between the connecting sleeve and the detection component and the bolts approaching the detection chip. The mounting hole and the mounting protrusion are detachably connected.

4. The nut loosening detection device according to claim 3, characterized in that: The connecting sleeve is also provided with a first positioning portion and a second positioning portion, the first positioning portion is located on the second positioning portion, the first positioning portion is used to connect with the nut, the first positioning portion is provided with a polygonal structure and the bottom surface is connected with the second positioning portion, the inner diameter of the first positioning portion is larger than the inner diameter of the second positioning portion; the second positioning portion is provided with a columnar structure and one end is located at the center position of the first positioning portion.

5. The nut loosening detection device according to claim 4, characterized in that: The mounting portion is arranged on the outer wall surface of the connecting sleeve and is located on the second positioning portion. The mounting portion is also provided with a positioning protrusion, a rectangular groove and a positioning hole. The positioning protrusion is an arc-shaped protrusion extending to one side of the outer wall surface of the connecting sleeve. The positioning protrusion is used for installing the mounting sleeve. One end of the rectangular groove is connected to the lower end surface of the positioning protrusion. The rectangular groove is used to connect with the mounting sleeve so that the connecting sleeve and the mounting sleeve are connected. The positioning hole is used to connect with the mounting protrusion.

6. The nut loosening detection device according to claim 5, characterized in that: The mounting protrusion is an irregular protrusion extending to one side of the wall surface of the positioning hole. The mounting protrusion is provided with a connecting part and a fixing part. One end of the connecting part is connected to the wall surface of the positioning hole and the front face of the connecting part is not higher than the front face of the positioning protrusion. The fixing part is connected to the other end of the connecting part and the front face of the fixing part is higher than the front face of the positioning protrusion so as to cooperate with the mounting hole on the connecting sleeve so that the connecting sleeve and the mounting sleeve are connected.

7. The nut loosening detection device according to claim 6, characterized in that: The inner diameter of the mounting sleeve is not less than the outer diameter of the second positioning portion of the connecting sleeve so that the mounting hole of the mounting sleeve can position the mounting protrusion on the connecting sleeve. The mounting protrusion cooperates with the mounting hole so that the front of the mounting protrusion is lower than the outer wall surface of the mounting sleeve. The fixing portion of the mounting protrusion is pressed so that the front of the mounting protrusion is lower than the inner wall surface of the mounting sleeve so as to facilitate the removal of the connecting sleeve from the mounting sleeve.

8. The nut loosening detection device according to claim 3, characterized in that: A first thread is arranged on the outer wall surface of the mounting sleeve; a sealing shell is arranged on the bottom of the mounting sleeve and a second thread is arranged on the inner wall surface of the sealing shell to cooperate with the first thread on the outer wall surface of the mounting sleeve so that the mounting sleeve is connected to the sealing shell, and the sealing shell is used to prevent impurities from entering the interior of the mounting sleeve and affecting the detection of the detection chip.

9. The nut loosening detection device according to claim 5, characterized in that: A first mounting position and a second mounting position are set on the inner wall surface of the mounting sleeve. The first mounting position is provided with a strip protrusion, and the strip protrusion cooperates with the rectangular groove on the connecting sleeve to connect the connecting sleeve and the mounting sleeve. The width of the strip protrusion is not greater than the groove width of the rectangular groove; the second mounting position is provided with a plurality of L-shaped protrusions and a fixed protrusion, and the L-shaped protrusions and the fixed protrusions are used to install the detection component.

10. The nut loosening detection device according to claim 9, characterized in that: The detection component also includes a main control board, a battery pack and a protective cover. The main control board is electrically connected to the battery pack and the detection chip. The main control board and the battery pack are installed on the fixed protrusions of the second installation position. The detection chip is installed below the main control board and the battery pack. The detection chip detects the direction of the magnetic field at the end of the bolt positioned by the connecting sleeve to determine whether the nut and the bolt are loose. The protective cover is installed on the second installation position of the mounting sleeve. The lower bottom surface of the protective cover is flush with the lower end surface of the mounting sleeve. The protective cover is used to prevent the detection chip from being affected by external electromagnetic radiation and affecting the detection result of the detection chip.

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