Handheld bearing monitoring and diagnosing device

Abstract

The utility model discloses a handheld bearing monitoring and diagnosis device, which relates to the technical field of bearing monitoring, and comprises a main body, a handheld main shell, a mainboard and a battery, the mainboard is connected with the battery, the mainboard is provided with a signal receiving board and penetrates out of the main shell through an electric connection structure, and the mainboard is provided with a wireless module; the sensor part is detachably connected with the main body, the sensor part comprises an auxiliary shell, a signal adapter plate and an MEMS sensor, the auxiliary shell is provided with a connecting structure with a bearing, the signal adapter plate is electrically connected with the signal receiving plate, and the signal adapter plate is electrically connected with the MEMS sensor. According to the utility model, real-time monitoring and real-time diagnosis can be carried out on the bearing conveniently, and a prompt can be sent out at the mobile terminal after a problem is found, so that the working efficiency of the bearing is greatly improved, and the influence and loss caused by the problem of the bearing are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing monitoring, and particularly relates to a handheld bearing monitoring and diagnosing device. Background Art

[0002] Bearings are very critical components in mechanical equipment, and their operating status directly affects the performance and lifespan of the equipment. The maintenance and repair of bearings mainly include the following aspects: Regular inspection: Regularly check the operating status of the bearings, including sound, temperature, vibration, etc., and promptly detect any abnormalities. Cleaning and maintenance: Keep the bearings and their surrounding environment clean to prevent impurities such as dust and moisture from entering the interior of the bearings, causing wear or corrosion. Lubrication and maintenance: Regularly lubricate the bearings, select the appropriate lubricant, and ensure the sufficiency and cleanliness of the lubricant, which can reduce friction and extend the lifespan of the bearings. Adjusting the clearance: According to the usage of the bearings, timely adjust the preload and radial clearance of the bearings to ensure the optimal working state of the bearings. Replacement and repair: When the bearings show severe wear, cracks, spalling, etc. that cannot be repaired, new bearings should be replaced in a timely manner. When performing bearing repairs, if encountering complex technical problems, it is recommended to contact professional repair personnel or bearing manufacturers to avoid greater losses caused by improper operation. In the past, the maintenance of bearings was mainly divided into two categories: regular maintenance and after-failure maintenance. These two methods are costly and cannot effectively prevent the occurrence of bearing failures. Therefore, real-time monitoring and real-time diagnosis of the operating status of bearings are the main solutions to the problem, which can effectively avoid major failures.

[0003] For example, the patent with the publication number CN117949208 for a handheld bearing monitoring and diagnosing device discloses a real-time monitoring tooling for the test torque of a megawatt-class wind power bearing, including a bearing to be detected, a machine base, a tooling base, and a main shaft. The bearing to be detected is installed on the tooling base. There is a motor assembly on the machine base, radial actuators are arranged on both sides of the tooling base, an axial actuator group is arranged on the machine base, a hydraulic loading system for controlling the oil pressure of the radial actuators is arranged on the machine base, load sensors are arranged on both sides of the tooling base, the detection values of the two load sensors are respectively expressed as N and N1, the oil cylinder oil pressure values of the two radial actuators are respectively expressed as P and P1, the force arm values of the two radial actuators are both expressed as M, and the oil cylinder loading area values of the two radial actuators are both expressed as C. The calculation formula for the load torque of the bearing to be detected is: (丨N - N1丨 * M) - (丨P - P1丨 * C).

[0004] However, for the monitoring and diagnosis of bearings, devices that are not easily portable are generally used, which are large in size and not convenient enough. Staff cannot stay beside the monitoring device 24 hours a day to conduct monitoring and diagnosis all the time, which restricts the work efficiency to a certain extent. Summary of the Utility Model

[0005] Technical problems to be solved by utility models

[0006] In response to the technical problem of how to conveniently and portablely perform real-time monitoring and real-time diagnosis of bearings, the utility model provides a handheld bearing monitoring and diagnosis device, which can perform real-time monitoring and real-time diagnosis of bearings in a portable manner. When a problem is found, a reminder will be issued on the mobile terminal, which greatly improves the working efficiency of the bearings and reduces the impact and losses caused by bearing problems.

[0007] Technical Solution

[0008] In order to solve the above problems, the technical solution provided by the utility model is:

[0009] A handheld bearing monitoring and diagnostic device comprises a main body, including a handheld main shell, a main board and a battery, wherein the main board is connected to the battery, the main board is provided with a signal receiving board and passes through the main shell through an electrical connection structure, and the main board is provided with a wireless module; a sensor part is detachably connected to the main body, the sensor part comprises a sub-shell, a signal adapter board and a MEMS sensor, the sub-shell is provided with a connection structure with the bearing, the signal adapter board is electrically connected to the signal receiving board, and the signal adapter board is electrically connected to the MEMS sensor.

[0010] Portability and ease of use: The handheld design makes it easy to carry and can be quickly deployed at different work sites without the need for complex installation procedures, greatly improving the flexibility and efficiency of monitoring work. Real-time monitoring and intelligent diagnosis: The MEMS sensor equipped with the device can collect key parameters such as vibration and temperature during bearing operation with high precision. The signal receiving board and wireless module on the main board are responsible for data processing and transmission, realizing real-time monitoring and intelligent diagnosis of the bearing health status, which helps to warn potential faults in advance and reduce unplanned downtime. Wireless communication and remote reminder: The built-in wireless module allows the device to communicate wirelessly with the user's mobile device or other monitoring system. Once an abnormal situation is detected, an alarm can be immediately sent to the user through mobile phone APP, SMS, etc. to ensure that the problem is responded to and handled in a timely manner. Modular design and scalability: The sensor part and the main body adopt a detachable connection method, which is convenient for replacing the sensor type or performing maintenance and upgrades according to different monitoring needs, and also improves the adaptability and long-term use value of the equipment. Data analysis and decision support: The main board can not only process real-time data, but also store historical data. Through the analysis algorithm, the data is deeply mined to provide fault trend prediction and health assessment reports, providing a scientific basis for the formulation of equipment maintenance strategies. Cost savings and efficiency improvement: Through preventive maintenance strategies, the device can effectively reduce production interruptions and high repair costs caused by bearing failures, improve equipment availability and production efficiency, and have significant cost savings in the long run.

[0011] Optionally, the main housing is provided with an upper contact pin support block, and the auxiliary housing is provided with a lower contact pin support block, and the upper contact pin support block is electrically connected to the lower contact pin support block via a spring probe.

[0012] Reliable electrical connection: As an elastic connector, the spring probe can form a stable electrical contact between the upper and lower stylus holders, and maintain good conductivity even under slight vibration or displacement, ensuring the continuity and accuracy of data transmission. Convenient loading and unloading operation: The electrical connection achieved by the spring probe makes the connection between the sensor part and the main body simple and quick, and the assembly or disassembly of the equipment can be completed without additional tools or complicated operation steps, which improves the efficiency and convenience of on-site operation. Adaptive adjustment ability: The spring probe has a certain elasticity and adaptive adjustment ability, which can adapt to stylus holders of different thicknesses. Even within the manufacturing tolerance range, it can ensure stable contact pressure and avoid data transmission errors or interruptions caused by poor contact. Durability and long life: The spring probe is usually made of fatigue-resistant metal materials, with high durability and long service life. It can withstand multiple plug-ins and unplugs without deformation or breakage, reducing the frequency of maintenance and replacement, and reducing the cost of use. Dustproof and waterproof performance: Under a reasonably designed sealing structure, the connection point between the spring probe and the stylus holder can reach a certain dustproof and waterproof level, protecting the electrical interface from the influence of the external environment and ensuring normal operation under harsh conditions. Compatibility and standardization: Spring probes are widely used as standard electrical connectors in a variety of devices and applications, which makes handheld bearing monitoring and diagnostic devices more flexible in design and can be more easily integrated and interchangeable with other systems or components.

[0013] Optionally, the main body is provided with a first magnetic structure, and the sensor portion is provided with a second magnetic structure having a different magnetic property from that of the main body.

[0014] Quick connection and removal: Magnetic connection provides a quick and easy way to assemble, without the need for traditional fasteners such as screws and snaps. Simply bring the sensor unit close to the main body, and the magnetic force will automatically adsorb and connect. Similarly, disassembly is also very easy, and only a slight pulling force is required to separate, which greatly saves operation time and improves work efficiency. Accurate positioning: The design of the magnetic structure is usually directional. Only when the sensor unit is correctly aligned can the magnetic structures one and two be firmly adsorbed, which helps to ensure that the sensor unit can be accurately installed at the predetermined position on the main body every time, avoiding data collection errors caused by position deviation. Non-destructive installation: Compared with traditional mechanical fixing methods, magnetic connection will not leave any permanent marks on the main body or sensor unit, nor will it damage the surface of the device due to repeated installation and removal, maintaining the integrity and aesthetics of the device. Strong adaptability: The strength of the magnetic connection can be controlled by adjusting the size, quantity and material of the magnet to adapt to sensor units of different weights and sizes. At the same time, the magnetic structure can also be designed into various shapes to match the use requirements in different occasions. Safety and stability: High-quality magnets are designed with a balance between maximum suction and minimum release force to ensure that the sensor will not fall off accidentally during normal use, but can be easily separated when disassembled, which not only ensures the safety of the equipment but also improves the convenience of operation. Environmentally friendly: Magnetic connection is a non-contact fixing method without the use of chemical adhesives, avoiding pollution to the environment, and also facilitating the recycling and reuse of equipment, in line with the concept of sustainable development.

[0015] Optionally, the sensor portion is provided with a surface in contact with the bearing, and the surface is fixedly connected to the MEMS sensor.

[0016] The MEMS sensor is firmly fixed, so that the MEMS sensor can fully receive the vibration transmitted by the bearing, reduce vibration errors and improve monitoring accuracy.

[0017] Optionally, the surface is provided with a magnetic structure three for connecting with a bearing.

[0018] The magnetic structure three is attracted to the outer shell of the bearing, which is a connection method convenient for assembly and disassembly. When in use, it is attracted to the iron or steel bearing outer shell, which is convenient and fast, easy to operate, and improves work efficiency.

[0019] Optionally, the secondary housing is provided with a groove adapted to the MEMS sensor, and the MEMS sensor is embedded in the groove.

[0020] Precise fixation: The groove design ensures that the MEMS sensor is precisely fixed in the sub-housing, avoiding displacement of the sensor due to vibration or external force during operation, thereby ensuring the accuracy and consistency of the sensor measurement data. Protective effect: The groove not only provides physical fixation, but also plays a certain protective role, protecting the MEMS sensor from external impact, dust, moisture and other environmental factors, extending the service life of the sensor. Heat conduction: Through close contact with the sub-housing, the heat generated by the MEMS sensor can be dissipated more effectively, avoiding the impact of overheating on the sensor performance and ensuring that the sensor operates within the optimal operating temperature range. Space optimization: The groove design allows the sensor to be embedded, reducing the overall volume of the sensor part, making the handheld bearing monitoring and diagnostic device more compact and lightweight, easy to carry and operate. Easy to replace and maintain: Although the sensor is fixed in the groove, this design usually also takes into account the replacement and maintenance needs of the sensor. Through appropriate structural design, such as the use of snaps, screws or magnetic suction, the installation and removal of the sensor can be made more convenient, reducing maintenance costs and time. Cost-effectiveness: Through precisely designed grooves, the requirements for sensor packaging can be reduced, and sometimes even additional packaging materials can be eliminated, thereby reducing the manufacturing cost of the device to a certain extent.

[0021] Optionally, the main board is connected to a key board and keys, and the keys extend out of the main housing.

[0022] Intuitive operation: Physical buttons provide a direct and intuitive operation method. Users can perform various functions of the device by touching the buttons, such as turning on and off, starting / stopping monitoring, mode switching, etc., without relying on the screen display. It is particularly suitable for outdoor or low-light working environments. Fast response: Compared with touch screens, physical buttons tend to respond faster. Pressing them immediately triggers the corresponding function, reducing operation delays and improving the real-time and operational efficiency of the device. Durability: High-quality button designs usually have high wear resistance and impact resistance, and can maintain good operating performance even in harsh industrial environments. They are not prone to failure due to frequent use or external collisions. Blind operation: The position and shape design of the physical buttons allow users to operate the device without looking directly at it. This is especially useful for scenarios where both hands are required to perform other tasks at the same time, improving the safety and convenience of operation.

[0023] Optionally, the main shell and the auxiliary shell are both cylindrical, and the connecting portion between the main shell and the auxiliary shell is a socket connection.

[0024] Stable structure: The cylindrical design naturally disperses external forces, making the device more stable and less prone to deformation or damage when impacted or squeezed, increasing the durability of the device. Easy to hold: The cylindrical shape fits the holding habits of human hands, making the handheld bearing monitoring and diagnostic device more comfortable to use and reducing fatigue caused by long-term holding. Good sealing: The sleeve connection method can effectively prevent dust, moisture and other external substances from invading the interior of the device through the design of a reasonable sealing ring or sealing gasket, thereby improving the protection level of the device and making it suitable for use in various harsh environments. Accurate positioning: The cylindrical sleeve structure can ensure precise alignment between the main housing and the auxiliary housing, avoiding data collection errors caused by unstable or misaligned connections, and ensuring the accuracy and consistency of monitoring data. Convenient disassembly and assembly: The sleeve connection method is usually easier to disassemble and assemble than a threaded connection or a snap-on connection. It can be connected or separated by simply rotating or pushing and pulling, which improves the maintenance efficiency and flexibility of the equipment. Visual unity: The cylindrical appearance design gives people a simple and smooth visual experience, improves the overall aesthetics of the equipment, and also facilitates the standardized production and batch manufacturing of the equipment. High space utilization: The cylindrical structure has a high space utilization rate in the internal layout, which can arrange the positions of components such as the motherboard, battery, and sensor more reasonably, making the overall device more compact and easy to carry.

[0025] Beneficial Effects

[0026] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0027] The technical solution provided by the utility model is to set up a sensor part to be detachably connected with the main body, the sensor part includes a sub-housing, a signal adapter board and a MEMS sensor, the sub-housing is provided with a connection structure with a bearing, the signal adapter board is electrically connected with the signal receiving board, and the signal adapter board is electrically connected with the MEMS sensor. The main body includes a handheld main housing, a main board and a battery, the main board is connected to the battery, the main board is provided with a signal receiving board and passes through the main housing through an electrical connection structure, and the main board is provided with a wireless module.

[0028] The handheld design makes it easy to carry and can be quickly deployed at different work sites without the need for complicated installation procedures, greatly improving the flexibility and efficiency of monitoring work.

[0029] The MEMS sensors equipped in the device can collect key parameters such as vibration and temperature during bearing operation with high precision. The signal receiving board and wireless module on the main board are responsible for data processing and transmission, realizing real-time monitoring and intelligent diagnosis of the bearing health status, which helps to provide early warning of potential faults and reduce unplanned downtime.

[0030] The built-in wireless module allows the device to communicate wirelessly with the user's mobile device or other monitoring system. Once an abnormal situation is detected, an alarm can be immediately sent to the user via mobile phone APP, SMS, etc., ensuring that the problem is responded to and handled in a timely manner.

[0031] The sensor part and the main body are connected in a detachable manner, which makes it easy to replace the sensor type or perform maintenance and upgrades according to different monitoring needs, while also improving the adaptability and long-term use value of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic cross-sectional view of a main body of a handheld bearing monitoring and diagnostic device proposed in an embodiment of the utility model;

[0033] Figure 2 A schematic cross-sectional view of a sensor portion of a handheld bearing monitoring and diagnostic device according to an embodiment of the present utility model;

[0034] Figure 3 A schematic diagram of the overall structure of a handheld bearing monitoring and diagnostic device proposed in an embodiment of the utility model;

[0035] Figure 4 A schematic diagram of the end portion of a main body of a handheld bearing monitoring and diagnostic device proposed in an embodiment of the utility model;

[0036] Figure 5 A schematic diagram of an end portion of a sensor portion of a handheld bearing monitoring and diagnostic device proposed in an embodiment of the utility model;

[0037] 1. Main body; 2. Main shell; 3. Upper contact pin support block; 4. Clamping ring; 5. Main board; 6. Soft-pack lithium battery; 7. Main board support plate; 8. Ring magnet one; 9. Signal receiving board; 10. Key board; 11. Lower contact pin support block; 12. Back cover; 13. MEMS sensor; 14. Signal adapter board; 15. Ring magnet two; 16. Ring magnet three; 17. Sensor part. DETAILED DESCRIPTION

[0038] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0039] Example

[0040] Combined with Figure 1A handheld bearing monitoring and diagnostic device comprises a main body 1, a handheld main housing 2, a main board 5 and a battery, wherein the main board 5 is connected to the battery, the main board 5 is provided with a signal receiving board 9 and passes through the main housing 2 through an electrical connection structure, and the main board 5 is provided with a wireless module. The top of the main housing 2 is provided with an end cover fixed by a clamping ring 4, and the end cover is a plastic cover. The key board 10 is fixed in the plastic cover by self-tapping screws, and the plastic cover is installed in the main body 1 and is firmly fixed by the clamping ring 4.

[0041] The mainboard 5 is connected with a key board 10 and keys, and the keys are passed through the main housing 2. The mainboard 5 is fixedly connected with a mainboard 5 support plate, and the mainboard 5 support plate is fixedly connected to the main housing 2 to provide support force.

[0042] The main housing 2 is provided with an upper stylus support block 3, and the secondary housing is provided with a lower stylus support block 11, and the upper stylus support block 3 is electrically connected to the lower stylus support block 11 through a spring probe. The main body 1 is provided with a magnetic structure 1, and the sensor part 17 is provided with a magnetic structure 2 of opposite polarity to the main body 1. The magnetic structure 1 is an annular magnet 1 8, and the magnetic structure 2 is an annular magnet 2 15. The connection part between the main housing 2 and the secondary housing is a sleeve connection.

[0043] The signal receiving board 9 is fixed to the upper contact pin support block 3 by screws, the annular magnet 8 is fixed to the upper contact pin support block 3, the main board 5, the battery and the main board 5 support plate are fixed to the upper contact pin support block 3 by screws, and the upper contact pin support block 3 is fixed in the main body 1 by screws.

[0044] The main body 1 is powered by a soft-pack lithium battery 6 and is used in conjunction with a mobile phone. The instrument is controlled and operated through the corresponding APP on the mobile phone. Both wired and wireless connection modes are supported. The wired connection is through the Type-C port to connect the mobile phone, and the wireless connection is established by connecting the mobile phone and the instrument through WiFi, which can realize online monitoring and diagnosis of the bearing operation status. The Type-C port is set at the top of the main housing 2 and connected to the motherboard 5.

[0045] Combined with Figure 2 , sensor part 17 points:

[0046] The sensor part 17 is detachably connected to the main body 1, and the sensor part 17 includes a sub-shell, a signal adapter board 14 and a MEMS sensor 13. The sub-shell is provided with a connection structure with a bearing, the signal adapter board 14 is electrically connected to the signal receiving board 9, and the signal adapter board 14 is electrically connected to the MEMS sensor 13.

[0047] MEMS (Micro Electro Mechanical Systems) accelerometer: is an accelerometer manufactured using MEMS technology. Due to the use of micro-electromechanical system technology, its size is greatly reduced, and a MEMS accelerometer is only a fraction of the size of a fingernail. MEMS accelerometer has the advantages of small size, light weight, and low energy consumption. MEMS sensor 13 is a sensor that uses a MEMS accelerometer.

[0048] The second annular magnet 15 and the third annular magnet 16 are fixed to the lower stylus support block 11 and the back cover 12 respectively, so as to be magnetically attracted to the host part and to fix the instrument to the mechanical equipment in the actual scene. The MEMS sensor 13 is fixed to the back cover 12, and the signal adapter board 14 is fixed from the lower stylus support block 11. The back cover 12 is fixed to the lower stylus support block 11 by screws.

[0049] The host part and the sensor part 17 are connected by means of spring probes. The spring probes are welded on the signal receiving board 9 at the bottom of the host part. The signal adapter board 14 at the top of the sensor part 17 uses a gold-plated pad to contact the host spring probe to realize signal transmission. Both the host part and the sensor part 17 have built-in magnets. The sensor part 17 can be directly adsorbed on the bottom of the host. The host part and the sensor part 17 can be replaced and repaired separately.

[0050] Combined with Figure 3 The main shell 2 and the auxiliary shell are both cylindrical, and the main shell 2 is also provided with threads for handholding to increase friction.

[0051] Combined with Figure 4 , 5 The upper stylus support block 3 is designed with three raised structures on the surface, and the middle raised structure is on the same center line with one of the five stylus pins on the outer circle of the signal receiving board 9, and the internal magnet and the magnet in the lower stylus support block 11 must be opposite in sex. The corresponding lower stylus support block 11 is designed with three recessed notch structures, and the middle notch is also on the same center line with one of the five gold-plated pads, and the internal magnet and the magnet in the upper stylus support block 3 must also be opposite in sex, in order to play a guiding and fixing role in actual use, so as to prevent the stylus pins and pads from not corresponding one to one and the magnets of the same sex from repelling each other.

[0052] The sensor part 17 is provided with a surface in contact with the bearing, the surface is located inside the back cover 12, and the surface is fixed to the MEMS sensor 13. The MEMS sensor 13 is firmly fixed so that the MEMS sensor 13 can fully receive the vibration transmitted by the bearing, reduce vibration errors, and improve monitoring accuracy.

[0053] The surface is provided with a magnetic structure three for connecting with the bearing.

[0054] The magnetic structure three is attracted to the outer shell of the bearing, which is a connection method convenient for assembly and disassembly. When in use, it is attracted to the iron or steel bearing outer shell, which is convenient and fast, easy to operate, and improves work efficiency.

[0055] The sub-housing is provided with a groove adapted to the MEMS sensor 13, and the MEMS sensor 13 is embedded in the groove. The groove is located on the back cover 12. Precise fixation: The design of the groove can ensure that the MEMS sensor 13 is accurately fixed in the sub-housing, avoiding displacement of the sensor due to vibration or external force during operation, thereby ensuring the accuracy and consistency of the sensor measurement data. Protective effect: The groove not only provides physical fixation, but also plays a certain protective role, protecting the MEMS sensor 13 from external impact, dust, moisture and other environmental factors, thereby extending the service life of the sensor.

[0056] Working principle:

[0057] The bottom sensor has a built-in three-axis MEMS accelerometer that can simultaneously collect vibration signals in the three axes of x, y, and z, and transmit the data to the mobile terminal in real time. The staff will compare the received signals with the bearing database, analyze and derive the operating status of the bearing. If a problem is found, a reminder will be issued on the mobile phone, which greatly improves the working efficiency of the bearing and reduces the impact and losses caused by bearing problems.

[0058] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A handheld bearing monitoring and diagnostic device, characterized in that: include The main body includes a handheld main housing, a main board and a battery, wherein the main board is connected to the battery, the main board is provided with a signal receiving board and passes through the main housing through an electrical connection structure, and the main board is provided with a wireless module; The sensor part is detachably connected to the main body, and the sensor part includes a sub-shell, a signal adapter board and a MEMS sensor. The sub-shell is provided with a connection structure with a bearing, the signal adapter board is electrically connected to the signal receiving board, and the signal adapter board is electrically connected to the MEMS sensor.

2. A handheld bearing monitoring and diagnostic device according to claim 1, characterized in that: The main housing is provided with an upper contact pin support block, and the auxiliary housing is provided with a lower contact pin support block. The upper contact pin support block is electrically connected to the lower contact pin support block through a spring probe.

3. A handheld bearing monitoring and diagnostic device according to claim 1, characterized in that: The main body is provided with a first magnetic structure, and the sensor part is provided with a second magnetic structure having a different magnetic property from that of the main body.

4. A handheld bearing monitoring and diagnostic device according to claim 1, characterized in that: The sensor portion is provided with a surface in contact with the bearing, and the surface is fixedly connected to the MEMS sensor.

5. A handheld bearing monitoring and diagnostic device according to claim 4, characterized in that: The surface is provided with a magnetic structure three for connecting with the bearing.

6. A handheld bearing monitoring and diagnostic device according to claim 4, characterized in that: The secondary housing is provided with a groove adapted to the MEMS sensor, and the MEMS sensor is embedded in the groove.

7. A handheld bearing monitoring and diagnostic device according to claim 1, characterized in that: The main board is connected with a key board and keys, and the keys extend out of the main housing.

8. A handheld bearing monitoring and diagnostic device according to any one of claims 1 to 7, characterized in that: The main shell and the auxiliary shell are both cylindrical, and the connecting part between the main shell and the auxiliary shell is a sleeve connection.

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