QM rechargeable handheld high-precision scanning code integrated tightening machine

Abstract

The utility model is suitable for handheld electric torque tightening machine field provides QM rechargeable handheld high accuracy scan code integrated tightening machine, include: whole shell, as installation matrix, code scanner, be located in the inner chamber front or end of whole shell, its scan code end is exposed to whole shell, main control board, be located in the inner chamber middle part of whole shell, with code scanner electricity is connected, power transmission component, including motor, gear shaft and output head, in the utility model, add scan code function, be suitable for assembly production line use, optimize equipment wireless transmission, data storage and sensor design, improve equipment data accuracy and precision, optimize main control board heat dissipation, improve equipment response efficiency, enhance power transmission reliability, promote overload protection ability, optimize control framework, promote dynamic response speed, improve operation comfort, enhance protection performance, promote display and output component durability, reduce maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of handheld electric torque tightening machines, and particularly relates to the QM rechargeable handheld high-precision barcode scanning integrated tightening machine. Background Technology

[0002] In practical applications, especially in assembly lines, existing handheld barcode scanners suffer from poor user experience and insufficient functional compatibility due to structural design flaws. They cannot meet the requirements for high-precision tightening and stable operation, and in particular, they cannot be integrated with existing production line systems. Specific technical problems are as follows: No QR code scanning function and broken data system: Most of the equipment only has basic torque measurement and output functions and does not integrate a barcode scanning module, so it cannot connect to the QR code, barcode and other identification systems of products in the production line; at the same time, it lacks data association logic and cannot collect product identification information simultaneously during torque operation, so the "product identity-tightening data" cannot be bound, and a traceable data system cannot be built. It is completely out of touch with the integrated "scan-operation-record" requirements of modern production lines, and requires additional independent barcode scanning equipment, which increases the operation process and cost. Insufficient data accuracy and control precision: Sensor design flaws: The torque sensor does not adopt an ultra-thin disc-shaped thin-film structure and a three-patch layout, so the torque force cannot be uniformly distributed to the strain gauges, and there is no signal redundancy verification mechanism. The torque detection error is often large, and accurate sensing cannot be achieved. Data processing shortcomings: It lacks a wireless WIFI / Bluetooth transmission module and local data storage function. Torque data needs to be manually recorded or exported via wired connection, which is prone to human error. It cannot be uploaded to the host computer system in real time, nor can it receive tightening parameters issued by the host computer. Lack of control logic: The closed-loop feedback structure of servo motor and torque sensor is not adopted, and the motor drive lacks three-loop control (current loop, speed loop, position loop), making it impossible to correct torque output in real time and difficult to achieve high-precision tightening control; Poor heat dissipation on the main control board leads to inefficient response: The existing equipment's main control board is directly fixed to the inner cavity of the outer shell, without a targeted heat dissipation structure of "heat-conducting components + heat dissipation holes". During continuous operation, the heat generated by the main control board (including decoding chip and control chip) accumulates in the sealed inner cavity, which slows down the decoding speed and delays the output of control signals. In severe cases, it can cause overheating and damage to components, shortening the service life of the equipment, which contradicts the requirement of "stable and efficient operation of the main control board". Poor reliability of power transmission and lack of overload protection: The power transmission path (motor-gear shaft-output head) does not integrate a high-precision torque sensor, making it impossible to monitor the output torque in real time. When the load connected to the output end is too large, there is no overload protection mechanism, which cannot cut off the motor power or adjust the output in time. This can easily cause the hollow cup brushless motor to burn out due to overload and the planetary gear shaft to deform. It cannot adapt to the "long-term continuous operation" scenario of the assembly production line, resulting in a high equipment failure rate. Low operating comfort and insufficient protection: The handle design is unreasonable: it does not adopt an ergonomic curve design, has a low fit with the palm, and lacks anti-slip rubber sleeves, finger grooves, or other friction-enhancing structures on the outer perimeter. When hands are sweaty, the equipment is prone to slipping, posing a safety hazard. Poor button experience: The forward / reverse control buttons and start button are mostly made of hard material, without any curved grooves or fitting structures to fit the fingertips. Pressing them for a long time can easily cause finger pain. Overall lack of protection: There is no structural optimization for hand fatigue, and operators experience significant discomfort after using it continuously for more than 4 hours a day, which is far from meeting the requirements of "efficient and comfortable operation".

[0003] Display and output components have low durability: Display components are easily damaged: The screen surface lacks scratch-resistant protective components such as tempered glass and wear-resistant coating. Daily collisions and friction can easily cause scratches, affecting display clarity and requiring frequent screen replacements. Poor compatibility of output components: The outer periphery of the output head has no anti-slip texture, making it easy to slip when docking with external components. Furthermore, the end has no magnetic positioning or concave-convex adaptation structure, and docking positioning takes more than 3 seconds. Repeated docking will also aggravate the wear of the output head, increasing the frequency and cost of maintenance. The control architecture has a slow response time. The system does not adopt a servo closed-loop system integration design and lacks real-time feedback linkage between the angle encoder and torque sensor, making it impossible to build a dynamic control logic of "detection-feedback-correction". The equipment has a delay in responding to operation commands and is prone to motion lag in high-frequency, fast-paced production line operations, making it unable to meet the requirements of "fast and accurate operation". Therefore, the QM rechargeable handheld high-precision barcode scanning and tightening machine is needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a QM rechargeable handheld high-precision barcode scanning and tightening machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: QM rechargeable handheld high-precision barcode scanning and tightening machine includes: The overall outer shell, serving as the mounting base, has a hollow inner cavity and a mounting structure for assembling various components; A barcode scanner is located at the front or end of the inner cavity of the overall housing, with its scanning end exposed outside the overall housing, for collecting barcode information; The main control board is located in the middle of the inner cavity of the overall shell and is electrically connected to the barcode scanner. It is used to control the operation of the motor, collect and process data, process barcode information and output control signals. It has a wireless WIFI or Bluetooth function module integrated for wireless data transmission. The power transmission assembly includes a motor, a gear shaft, and an output head. The motor is located in the rear of the inner cavity of the overall housing. The output end of the motor is connected to the output head through the gear shaft. The output head is exposed outside the overall housing and is used to output power. The gear shaft adopts planetary gears, and power is split through multi-gear meshing, which has high transmission accuracy and stability. The motor adopts a hollow cup brushless motor with a gear transmission reduction ratio of 1:10 or higher. The rotor adopts a hollow cup-shaped structure. A high-precision torque sensor is located on the transmission path consisting of the motor, gear shaft, and output head, and is electrically connected to the main control board. It adopts a disc-shaped thin-film strain gauge torque sensor. The disc-shaped thin-film design allows the torque force to be evenly distributed to each strain gauge area. It uses three sets of patches to divide the upper surface of the sensor body into multiple evenly distributed force surfaces. Each set of patches independently collects torque signals. Data redundancy verification is achieved through algorithm fusion processing to realize accurate torque sensing and output. An angle encoder is installed on the transmission path consisting of the motor, gear shaft, and output head, and is electrically connected to the main control board. It is used to detect the transmission angle and accurately measure and control the position, speed, or direction of rotating parts. The operation display component includes a screen, LED lights, control buttons, a USB data port forward / reverse control button, and a start button. The screen, LED lights, control buttons, and USB data port are embedded in the top or side of the overall housing and electrically connected to the main control board for displaying information. The forward / reverse control button and the start button are electrically connected to the main control board and are used to input operation commands. The ergonomic grip is fixed to the side of the overall shell. The forward / reverse control button and the start button are integrated into the ergonomic grip. A drive board is located inside the ergonomic grip to convert DC power into three-phase AC power to provide the original power for the motor. The power supply interface assembly, including a battery socket, is located at the end or side of the overall housing and is electrically connected to the main control board for connecting to an external power source.

[0006] The integrated installation design of the overall shell neatly integrates the scanning, control, transmission, operation, and power supply structures, avoiding interference between components and improving the overall compactness and portability of the equipment. The electrical connection between the main control board and each structure enables the coordinated processing of scanning information, torque data, and operation commands, ensuring precise equipment operation. The cooperation between the power transmission components and the high-precision torque sensor not only meets the power output requirements but also monitors the torque in real time, preventing overload damage and adapting to diverse working scenarios.

[0007] Further technical solutions include a positioning and mounting structure (such as a mounting base or positioning pin) between the barcode scanner and the overall housing to ensure the barcode scanner is fixed in position; a protective component (such as a ring-shaped protective sleeve) is provided on the outside of the barcode scanner's scanning end, and the protective component is detachably connected to the overall housing by means of threads, snaps, etc., for easy maintenance and replacement; a buffer structure (such as a rubber pad or sponge pad) is provided between the protective component and the barcode scanner. The positioning and installation structure prevents the scanner from shifting due to vibration, ensuring a stable scanning reference; the protective components effectively block direct damage to the scanning end from external collisions, extending the scanner's service life; the buffer structure absorbs vibrations from hand gripping or device placement, reducing the impact of vibration on scanning.

[0008] A further technical solution involves a heat dissipation structure between the main control board and the inner cavity of the overall housing. Heat-conducting components (such as thermally conductive silicone pads or metal heat-conducting plates) are attached to the surface of the main control board to conduct the heat generated by the main control board to the inner wall of the overall housing. Heat dissipation holes are opened on the side wall of the overall housing corresponding to the main control board to accelerate the dissipation of heat to the outside. The heat-conducting components and heat dissipation holes form an efficient heat dissipation path, preventing heat from accumulating in the inner cavity of the overall shell, keeping the main control board's operating temperature stable below 40℃. Compared with existing equipment without a heat dissipation structure, the main control board's processing speed is increased by more than 20%, while avoiding aging and failure of main control board components due to overheating, thus extending the overall service life of the equipment.

[0009] Further technical solutions include using flexible materials such as silicone and rubber for the forward / reverse control buttons and the start button, with curved protrusions and fingertip grooves on the top of the buttons to improve pressing comfort. The flexible material and conforming structure reduce hand fatigue from prolonged pressing, allowing operators to remain comfortable even after working for more than 8 hours a day.

[0010] Further technical solutions include scratch-resistant protective components (such as tempered glass and wear-resistant coating) on ​​the screen surface, with a light transmittance of over 90% that does not affect the display effect; and sealing components (such as nitrile rubber strips and foam sealing strips) at the gap between the screen and the overall casing. Scratch-resistant protective components resist daily scratches, preventing scratches on the screen surface and ensuring display clarity.

[0011] Further technical solutions include an anti-slip component (such as an anti-slip rubber sleeve or silicone sleeve) on the outer periphery of the ergonomic grip. The surface of the anti-slip component is provided with a finger groove, raised dots, and other limiting and friction-enhancing structures to adapt to the natural grip posture of the hand. Anti-slip components and friction-enhancing structures increase the friction between the hand and the handle, ensuring a stable grip even with sweaty hands, reducing the equipment slippage rate by more than 40%; the ergonomic design conforms to the palm curve, reducing local pressure during gripping, significantly reducing hand fatigue for operators holding the equipment for extended periods (such as 10 hours a day), improving the ease of operation and safety of use.

[0012] Further technical solutions include anti-slip textures and rubber sleeves on the outer periphery of the output head to increase friction between the output head and external components; and magnetic blocks and positioning bosses at the end of the output head to assist in quick and accurate docking between the output head and external components. The friction-enhancing structure prevents slippage when the output head is driven by external components, ensuring stable power output; the positioning component reduces the docking time between the output head and external components to within 2 seconds, improving work efficiency and preventing component wear caused by docking misalignment, making it suitable for work scenarios that require frequent docking (such as quick docking of material fixing structures after tightening work).

[0013] Compared with the prior art, the beneficial effects of this utility model are: This utility model adds a barcode scanning function, making it suitable for use on assembly lines: the handheld torque device can quickly and accurately acquire product-related information and build a data collection and association system based on QR codes, barcodes and other identifiers. This allows the device to read product information and complete data association in real time while performing torque detection, effectively enhancing the device's practical performance and meeting the stringent requirements of industrial production for data integrity and traceability. This invention optimizes the wireless transmission, data storage, and sensor design of the equipment to improve data accuracy and precision. The rear of the motor housing is equipped with a control board, digital display, buttons, and LEDs. The digital display shows information such as barcode scanning and tightening, the buttons are used for operation, and the LEDs display the results. The control board adds data storage and wireless transmission functions, recording barcode scanning information and transmitting it to the host computer system along with the tightening results. It can also receive tightening information from the host computer. The torque sensor adopts an ultra-thin disc-shaped compact design with a special three-group surround design, making the tightening machine's transmission efficiency more compact, its operation smoother at high speeds, and its torque more accurate. A servo motor design is used, with the motor driving a three-ring control system to form a closed-loop feedback structure with the torque sensor, providing accurate overall torque control. This invention optimizes the heat dissipation of the main control board and improves the response efficiency of the device. Through a heat dissipation transmission structure of "heat-conducting component - overall shell - heat dissipation holes," it specifically addresses the problem of poor heat dissipation of the main control board in existing devices. The heat-conducting component is attached to the surface of the main control board, which can quickly conduct the heat generated during operation. The heat-conducting component is in close contact with the support platform inside the overall shell, transferring the heat to the overall shell. The heat is then discharged to the outside through the heat dissipation holes in the overall shell corresponding to the main control board's location, preventing heat accumulation inside the shell. Ultimately, this allows the main control board to operate at a suitable temperature, preventing overheating from slowing down the decoding chip's processing speed and reducing the likelihood of damage to main control board components due to overheating, thus extending the device's lifespan. This utility model enhances the reliability of power transmission and improves overload protection: a high-precision torque sensor is installed on the transmission path between the gear shaft and the output head to detect torque data in real time during the transmission process and feed it back to the main control board; when the detected torque exceeds the safe range, the main control board can output a control signal to the motor in time to avoid motor overload burnout or gear shaft deformation, improve the reliability of the power transmission components, and adapt to long-term continuous operation scenarios. This utility model optimizes the control architecture and improves the dynamic response speed: it adopts a servo closed-loop system integration method. The servo closed-loop system integrates angle sensors, torque sensors and drives to build a real-time feedback-dynamic correction closed-loop control, which significantly improves the accuracy of equipment movement, response speed and anti-interference ability. This invention improves operational comfort and enhances protective performance: Through an optimized design of an ergonomic grip with an anti-slip, friction-enhancing structure, it addresses the problems of fatigue and poor protection inherent in existing equipment. The ergonomic grip conforms to the natural curve of the palm, reducing localized pressure on the hand and improving comfort during extended use. The grip's outer perimeter features an anti-slip rubber sleeve and finger grooves, increasing friction between the hand and grip, ensuring stable holding even with sweaty hands and reducing the risk of equipment slippage. The operation buttons are made of flexible material, enhancing the comfort of pressing them. This invention improves the durability of display and output components and reduces maintenance costs: By optimizing the protection of "anti-scratch protective components - friction-enhancing positioning structure", it solves the problems of easy damage and high maintenance costs of existing equipment components: anti-scratch protective components are set on the surface of the display screen to resist collisions and friction in daily use, reduce screen scratches, and ensure display clarity; anti-slip textures are set on the outer periphery of the output component and positioning components are set at the end to avoid slippage when docking with external components, and at the same time assist the output component to quickly and accurately dock with external components, reduce component wear caused by repeated docking, and reduce the overall maintenance cost of the equipment.

[0014] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side-view three-dimensional structural schematic diagram of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the overall outer shell of this utility model; Figure 4 This is a three-dimensional structural diagram of the screen of this utility model.

[0016] In the diagram: 1. Screen; 2. Main control board; 3. Overall casing; 4. Motor; 5. Gear shaft; 6. Output head; 7. Forward / reverse control button; 8. Start button; 9. Barcode scanner; 10. Ergonomic grip; 11. Battery socket; 12. High-precision torque sensor; 13. Angle encoder; 14. Wireless WIFI or Bluetooth module; 15. LED light; 16. Control buttons; 17. USB data port; 18. Driver board. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0019] Example 1 like Figure 1-4 As shown, this utility model embodiment provides a QM rechargeable handheld high-precision barcode scanning and tightening machine, including an overall shell 3, a barcode scanner 9, a main control board 2, a motor 4, a gear shaft 5, an output head 6, forward and reverse control buttons 7, a start button 8, a screen 1, an ergonomic grip 10, a battery socket 11, a high-precision torque sensor 12, an angle encoder 13, a wireless WIFI or Bluetooth function module 14, an LED light 15, control buttons 16, a USB data port 17, and a driver board 18; The overall outer shell 3 is made of ABS plastic and has a hollow cuboid structure. The front of the inner cavity has an integrated barcode scanner 9 mounting base, the middle has an integrated main control board 2 support platform, and the rear is fixed with a motor 4 bracket by screws. The barcode scanner 9 is a CCD barcode scanning module, which is fixed to the mounting base by M3 bolts. The scanning end extends 5mm out of the front opening of the overall housing 3 and is electrically connected to the signal input terminal of the main control board 2 by wires. The main control board 2 is a PCB circuit board, which is fixed to the support platform with screws and integrates MCU, decoding chip and interface circuit. Motor 4 is a hollow cup brushless motor, which is fixed to the motor bracket by bolts. The output shaft is connected to one end of the gear shaft 5 by a flat key, and the other end of the gear shaft 5 is connected to the output head 6 by a coupling. The high-precision torque sensor 12 is a disc-shaped thin-film strain gauge torque sensor, which is sleeved in the middle of the gear shaft 5 and electrically connected to the main control board 2 through wires. Screen 1 is a 2.4-inch LCD display, embedded in the mounting groove on the top surface of the overall housing 3, and electrically connected to the main control board 2 via an FPC cable; LED 14 is electrically connected to the main control board 2 and controlled by the main control board 2; control buttons 16 are soft keycaps, with up, down, left, right, confirmation, and return buttons; USB data port 17 is a USB interface component on the main control board 2, and the exposed USB interface can support data transmission function; The ergonomic grip 10 is made of ABS plastic and is fixed to the right side of the overall shell 3. Two button holes are opened on the surface. The forward and reverse control button 7 and the start button 8 are respectively embedded in the button holes and are electrically connected to the control input terminal of the main control board 2 through wires. The battery socket 11 is a DC power socket, which is embedded in the rear side wall of the overall housing 3 and is electrically connected to the power input terminal of the main control board 2 through a wire.

[0020] In this embodiment, the partitioned installation structure of the overall shell 3 enables the orderly fixation of each component and avoids interference; the barcode scanner 9 and the main control board 2 cooperate to realize barcode information collection and decoding; the motor 4-gear shaft 5-output head 6 realizes power output; and the high-precision torque sensor 12 monitors the torque in real time. In typical indoor barcode scanning tightening scenarios, the device's tightening torque accuracy can reach ±3%, the barcode scanning response time is ≤0.5 seconds, the output torque of motor 4 is stable at 0.5-2 N·m, the screen 1 displays clearly, and the ergonomic grip 10 is comfortable to hold. It can meet the basic high-precision tightening power output requirements and solve the problems of low tightening torque accuracy, lack of barcode scanning, and messy structure of existing equipment.

[0021] Example 2 The difference between this embodiment and embodiment 1 is that: the scanning end of the barcode scanner 9 is covered with a PC material ring-shaped protective sleeve, the protective sleeve is connected to the front opening edge of the overall shell 3 through an M2 thread, and a silicone ring-shaped buffer pad with a thickness of 2mm is provided between the protective sleeve and the barcode scanner 9. A 1mm thick copper heat-conducting sheet is attached to the surface of the main control board 2 with thermally conductive adhesive. The side of the heat-conducting sheet away from the main control board 2 is in close contact with the inner cavity support platform of the overall shell 3. The overall shell 3 has 6 heat dissipation holes with a diameter of 3mm on the side wall corresponding to the main control board 2. The surface of screen 1 is covered with tempered glass with a thickness of 1mm.

[0022] In this embodiment, the annular protective sleeve and buffer pad provide collision and vibration protection for the barcode scanner 9, and the heat-conducting sheet and heat dissipation holes provide efficient heat dissipation for the main control board 2. In outdoor assembly and tightening scenarios, the equipment can withstand minor collisions and vibrations. The main control board 2 maintains a stable operating temperature below 38°C, and the power transmission components do not experience any jamming. The screen 1 remains clearly visible even under strong light. Compared to Example 1, the equipment's environmental adaptability is significantly improved, solving the problems of poor protection and heat dissipation in existing equipment.

[0023] Example 3 The difference between this embodiment and embodiment 2 is that the top of the forward / reverse control button 7 and the start button 8 is provided with an arc-shaped groove with a depth of 1mm; The ergonomic grip 10 is covered with a 3mm thick anti-slip rubber sleeve. The surface of the rubber sleeve is molded to form three finger grooves, which are suitable for the index finger, middle finger, and ring finger. The inner wall of the finger groove is provided with 0.5mm high anti-slip protrusions. The outer periphery of the output head 6 is knurled to form an anti-slip texture with a texture depth of 0.2mm. The end of the output head 6 has a positioning hole with a diameter of 5mm, and a neodymium iron boron magnetic block is fixed in the positioning hole by bonding.

[0024] In this embodiment, the anti-slip rubber sleeve, finger grooves, and raised dots improve grip stability and comfort, while the anti-slip texture and magnetic blocks improve the transmission stability and docking efficiency of the output head 6. In high-frequency, high-load tightening operations, operators experience no significant fatigue after 12 hours of operation, and there is no slippage or accidental touch of the buttons. The equipment slippage rate is less than 3%, and the docking time between the output head 6 and the external material fixing structure is shortened to 1.5 seconds. There is no slippage in the transmission. Compared with Example 2, the equipment's operating comfort, work efficiency, and protection are further improved, solving the problems of operator fatigue, slow docking, and easy slippage in existing equipment.

[0025] Working principle and usage process of this utility model: The workflow of the QM rechargeable handheld high-precision barcode scanning and tightening machine revolves around "barcode information acquisition - signal processing - power output - status monitoring". Each component works together to achieve the device's functions, as detailed below: Start-up and power supply phase: Connect the external battery to the battery socket 11. The battery supplies power to the main control board 2 through the battery socket 11. After the main control board 2 is powered on, it performs a self-test and simultaneously outputs a wake-up signal to the screen 1, barcode scanner 9, and high-precision torque sensor 12. The screen 1 lights up and displays "Device self-test in progress". The barcode scanner 9 starts the CCD module preheating. The high-precision torque sensor 12 initializes and enters standby mode. After the self-test is completed, screen 1 displays "Ready to Standby", and the device enters the standby working state; During the scanning operation: The operator holds the ergonomic handle 10 with one hand, with the fingers embedded in the finger grooves, and uses the anti-slip rubber sleeve to hold the device stably; Align the scanning end of the barcode scanner 9 with the barcode to be scanned and adjust the distance between the device and the barcode; Press the button at the bottom of the barcode scanner 9, and the CCD module of the barcode scanner 9 will capture the barcode image, convert the image signal into an electrical signal, and transmit it to the decoding chip of the main control board 2 through the wire; The decoding chip processes the electrical signal and extracts the data information from the barcode. After processing, the main control board 2 converts the data information into a display signal and transmits it to the screen 1. The screen 1 displays the scanning result within 200ms. If the barcode image is blurry or the angle is off, the main control board 2 outputs a "scanning failed, please adjust the angle" prompt signal to the screen 1. The operator needs to readjust the angle or distance of the scanning end and press the button at the bottom of the barcode scanner 9 again to repeat the scanning process. Power output and torque monitoring stage: If power output is required after scanning, the operator presses the forward and reverse control button 7, which sends a direction command to the main control board 2; press and hold the start button 8, which sends a start command to the main control board 2, and the QM rechargeable handheld high-precision barcode scanning and tightening machine will start tightening work. Releasing the start button 8 will stop the work and output the current torque data. The main control board 2 outputs a drive signal to the motor 4 according to the instruction. The motor 4 is powered on and rotates, which drives the gear shaft 5 to rotate through the output shaft. The gear shaft 5 further drives the output head 6 to rotate, thereby realizing power output. Meanwhile, the high-precision torque sensor 12 detects the transmission torque of the gear shaft 5 in real time and converts the torque data into an electrical signal to be transmitted to the main control board 2. The MCU on the main control board 2 analyzes the torque data. If the torque reaches the set target torque, such as 2.5 N·m, the main control board outputs a stop signal to the motor 4 and displays the current tightening data, including the torque value, angle value, and tightening result, on the screen 1. If the torque exceeds the preset protection torque value, such as 4 N·m, a stop signal is output to the motor 4, and "Torque Exceeded" is displayed on the screen 1 to prevent damage to the motor 4 or the gear shaft 5. Shutdown and maintenance phase: After scanning and power output are completed, when standby lasts for 30 minutes, the main control board 2 sequentially cuts off the power supply to the barcode scanner 9, motor 4, and screen 1, leaving only the standby power supply to the battery socket 11; when the start button 8 is pressed again, the standby state is restored. If the device is not used for an extended period, remove the external battery to prevent over-discharge. To maintain the barcode scanner 9, simply unscrew the ring-shaped protective cover to disassemble or clean the scanning end. If maintenance of motor 4 or gear shaft 5 is required, simply remove the cover plate at the rear of the overall housing 3; overall maintenance is convenient.

[0026] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. The QM rechargeable handheld high-precision barcode scanning and tightening machine is characterized by, include: The overall shell (3), as the mounting base, has a hollow inner cavity and a mounting structure for assembling various components; A barcode scanner (9) is located at the front or end of the inner cavity of the overall housing (3), with its scanning end exposed outside the overall housing (3), and is used to collect barcode information; The main control board (2) is located in the middle of the inner cavity of the overall shell (3) and is electrically connected to the motor (4) and the barcode scanner (9). It is used to receive and process barcode scanning information and output control signals. It has a wireless WIFI or Bluetooth function module (14) integrated for wireless data transmission. The power transmission assembly includes a motor (4), a gear shaft (5) and an output head (6). The motor (4) is located in the rear of the inner cavity of the overall housing (3). The output end of the motor (4) is connected to the output head (6) through the gear shaft (5). The output head (6) is exposed outside the overall housing (3) and is used to output power. The gear shaft (5) adopts a planetary gear and achieves power splitting through multi-gear meshing, which has high transmission accuracy and stability. The motor (4) adopts a hollow cup brushless motor with a gear transmission reduction ratio of 1:10 or higher. The rotor adopts a hollow cup structure. A high-precision torque sensor (12) is installed on the transmission path consisting of the motor (4), gear shaft (5), and output head (6), and is electrically connected to the main control board (2). It adopts a disc-shaped thin-film strain gauge torque sensor. The disc-shaped thin-film design makes the torque force evenly distributed to each strain gauge area. It adopts three sets of patches to divide the upper surface of the sensor body into multiple evenly distributed force surfaces. Each set of patches independently collects torque signals. Data redundancy verification is achieved through algorithm fusion processing to realize accurate perception and output of torque. An angle encoder (13) is located on the transmission path consisting of the motor (4), gear shaft (5), and output head (6), and is electrically connected to the main control board (2). It is used to detect the transmission angle and accurately measure and control the position, speed, or direction of the rotating parts. The operation display component includes a screen (1), LED lights (15), control buttons (16), USB data port (17), forward and reverse control buttons (7) and start button (8). The screen (1) is embedded in the top or side of the overall housing (3) and electrically connected to the main control board (2) for displaying information. The forward / reverse control button (7) and the start button (8) are electrically connected to the main control board (2) and are used to input operation commands; The ergonomic grip (10) is fixed to the side of the overall shell (3). The forward and reverse control button (7) and the start button (8) are integrated into the ergonomic grip (10). The ergonomic grip (10) has a drive board (18) inside, which converts DC power into three-phase AC power to provide the original power for the motor (4). The power supply interface assembly includes a battery socket (11) located at the end or side of the overall housing (3) and electrically connected to the main control board (2) for connecting to an external power source.

2. The QM rechargeable handheld high-precision barcode scanning and tightening machine according to claim 1, characterized in that, The barcode scanner (9) is provided with a positioning and mounting structure between it and the overall shell (3), and the barcode scanner (9) is provided with a protective component on the outside of its scanning end. The protective component is detachably connected to the overall shell (3), and a buffer structure is provided between the protective component and the barcode scanner (9).

3. The QM rechargeable handheld high-precision barcode scanning and tightening machine according to claim 1, characterized in that, A heat dissipation structure is provided between the main control board (2) and the inner cavity of the overall shell (3). The heat dissipation structure includes a heat-conducting component attached to the surface of the main control board (2) and a heat dissipation hole opened on the overall shell (3) at the position corresponding to the main control board (2). The heat-conducting component is in contact with the inner wall of the overall shell (3).

4. The QM rechargeable handheld high-precision barcode scanning and tightening machine according to claim 1, characterized in that, The forward / reverse control button (7) and the start button (8) are both made of flexible material. A sealing component is provided at the assembly gap between the button and the ergonomic grip (10). The top of the button is provided with a fitting structure that fits the fingers.

5. The QM rechargeable handheld high-precision barcode scanning and tightening machine according to claim 1, characterized in that, The screen (1) has a scratch-resistant protective component on its surface, and a sealing component is provided at the mounting gap between the screen (1) and the overall shell (3). The scratch-resistant protective component is made of hard transparent material.

6. The QM rechargeable handheld high-precision barcode scanning and tightening machine according to claim 1, characterized in that, The outer periphery of the ergonomic grip (10) is provided with anti-slip components, the surface of the anti-slip components is provided with a limiting structure corresponding to the fingers, and the inner wall of the limiting structure is provided with a friction-enhancing structure.

7. The QM rechargeable handheld high-precision barcode scanning and tightening machine according to claim 1, characterized in that, The output head (6) has a friction-enhancing structure on its outer periphery and a positioning component at its end. The positioning component is a magnetic structure or a concave-convex fitting structure, used to achieve precise docking between the output head (6) and external components.

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