A high-precision intelligent micro-torque electric tightening tool for screws

Abstract

The utility model discloses a kind of high-precision intelligent micro-torsional electric tightening tools for screw, including shell, batch head quick-release mechanism, driving mechanism, circuit board and controller;Batch head quick-release mechanism includes connecting seat, connecting shaft, steel ball, sleeve and compression spring;Connecting seat is connected in shell first end;Connecting shaft is rotatably connected in connecting seat and its first end extension section is extended out of connecting seat;Extension section is provided with round hole;Steel ball is placed in round hole;Sleeve is slid on extension section and its middle inner wall has annular boss, and extension section extends with baffle ring;Compression spring is sleeved on extension section and its both ends are in contact with annular boss and baffle ring;Sleeve sliding can make annular boss extrude steel ball and be clamped into batch head tail groove;Driving mechanism is transmission connection connecting shaft;Circuit board is electrically connected driving mechanism to regulate its output torque and rotational speed;Controller is electrically connected circuit board to carry out signal interaction. User needs and industry pain points are solved, and assembly quality can be significantly improved, and production line investment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of industrial assembly tool technology, and more specifically to a high-precision intelligent micro-torque electric tightening tool for screws. Background Technology

[0002] Screw tightening tools are essential and commonly used equipment in the industrial assembly field. However, in highly reliable automated assembly fields such as automobiles and 3C products, imported tools are expensive, have long delivery cycles, are difficult to maintain after-sales, and their performance is somewhat excessive.

[0003] Currently, domestically produced similar products suffer from problems such as poor precision, low efficiency, difficulty in traceability, short lifespan, excessive pursuit of low cost, unstable product quality control, and poor user experience. Furthermore, existing screw tightening tools are relatively simple, and the connected screwdrivers are not easy to replace, making it impossible to meet the tightening needs of different screw models.

[0004] Therefore, how to provide a tool that can automatically tighten screws, enable the rapid disassembly of screwdrivers, solve user needs and industry pain points, improve assembly quality, and reduce production line investment costs is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a high-precision intelligent micro-torque electric tightening tool for screws. Through the quick-release mechanism of the screwdriver bit, it can realize the rapid installation and removal of screwdriver bits of different types, meet the tightening work of different types of screws, significantly improve assembly quality, reduce production line investment costs, and solve user needs and industry pain points.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-precision intelligent micro-torque electric tightening tool for screws includes:

[0008] case;

[0009] A quick-release bit mechanism includes a connecting seat, a hollow connecting shaft, a steel ball, a sleeve, and a compression spring. The connecting seat is detachably connected to the first end of the housing. The connecting shaft is rotatably connected to the connecting seat, with its first end extension extending out of the connecting seat to connect the bit. A circular hole is provided on the shaft corresponding to its first end extension. The steel ball is placed in the circular hole. The sleeve is slidably fitted on the extension, with an annular boss extending radially from its inner wall, and a retaining ring extending radially from the end of the extension away from the connecting seat. The compression spring is fitted on the connecting shaft, with its two ends abutting against the annular boss and the retaining ring, respectively. The sliding of the sleeve allows the annular boss to compress the steel ball, causing it to engage in the groove at the tail of the bit.

[0010] A drive mechanism, which is fixed inside the housing and whose output shaft is drively connected to the connecting shaft;

[0011] A circuit board, which is fixed inside the housing and electrically connected to the drive mechanism to regulate its output torque and speed;

[0012] The controller is electrically connected to the circuit board for signal interaction; the controller is equipped with a touch screen for adjusting tightening parameters and tightening process.

[0013] The beneficial effects of this utility model are as follows: pulling the sleeve causes the annular boss to misalign with the circular hole on the connecting shaft. At this time, the steel ball is in a free state and can roll within the circular hole. When a 4mm standard screwdriver bit is inserted into the connecting shaft and the sleeve is released, the elastic restoring force of the compression spring causes the sleeve to return to its original position. During this process, the annular boss will squeeze the steel ball, causing it to lock into the groove at the tail of the screwdriver bit. When disassembly is required, simply pull the sleeve. The cooperation between the sleeve and the steel ball enables quick disassembly of the screwdriver. In addition, by utilizing the cooperation of the controller and circuit board, an innovative motor drive algorithm is integrated, which can preset tightening parameters and step-by-step tightening processes to achieve stable, efficient, and reliable screw tightening operations. Moreover, the structure is compact and the cost is low, effectively solving user needs and industry pain points, significantly improving assembly quality, and reducing production line investment costs.

[0014] Preferably, the quick-release mechanism for the bit further includes a crescent-shaped connecting shaft, which is detachably connected to the inner cavity of the second end of the connecting shaft and can engage with the bit. The crescent-shaped connecting shaft engages with notched (crescent-shaped) bit, and the connecting shaft can engage with shank-type standard bit. Through the integrated design of the crescent-shaped connecting shaft and the connecting shaft, a single quick-release mechanism can seamlessly accommodate both notched and shank-type bit types commonly found on the market, thus broadening its applicability. Furthermore, the crescent-shaped connecting shaft is located within the inner cavity of the connecting shaft, making the structure more compact. The connection between the tightening tool and notched or shank-type bit can be achieved without replacing the connecting shaft.

[0015] Preferably, it further includes a hollow spindle, which is disposed within the connecting seat and drivesly connected to the output shaft of the drive mechanism; the second end of the connecting shaft is embedded within the spindle, and its outer wall can slide against the inner wall of the spindle. The spindle is connected to the drive mechanism, with the spindle acting as the driving shaft and the connecting shaft acting as the driven shaft. The rotation of the spindle transmits torque, causing the connecting shaft to drive the screwdriver bit to tighten.

[0016] Preferably, it also includes a buffer spring; the first end of the crescent-shaped connecting shaft can be engaged with a notch-type screwdriver bit, and the second end is bolted to the second end of the connecting shaft by a pin; a limit plate is fixed on the shaft of the connecting shaft; a buffer groove is formed on the shaft of the main shaft away from the drive mechanism; the pin is slidably connected in the buffer groove; the buffer spring is sleeved on the connecting shaft and its two ends abut against the limit plate and the opposite side walls of the main shaft, respectively. During the screw tightening process, an axial load is generated, which can compress the buffer spring under the action of the axial load, thereby causing the entire mechanism of the connecting shaft and the crescent-shaped connecting shaft to slide along the inner cavity of the main shaft. The sliding range is the length of the buffer groove. By setting the buffer spring, axial buffering can be achieved to prevent damage to the workpiece or drive mechanism due to axial impact load.

[0017] Preferably, the drive mechanism includes a bushing, a motor, and a reducer; the bushing is fitted inside the main shaft; the motor is fixed inside the housing; the reducer is keyed to the output shaft of the motor, and the output shaft of the reducer is fitted inside the bushing to drive the main shaft to rotate. The combination of the motor and the reducer can output a torque of 0.02Nm-1.5Nm, covering the tightening requirements of all small screws of M4 size and below.

[0018] Preferably, the circuit board integrates an encoder to monitor the output angle of the motor and control the motor's speed and output torque. The encoder integrates an innovative motor drive algorithm, enabling more efficient, stable, and reliable control of the entire screw tightening process.

[0019] Preferably, it also includes a lamp ring; the outer wall of the second end of the housing has an assembly groove; the lamp ring is embedded in the assembly groove and electrically connected to the circuit board. The color change of the lamp ring indicates whether the tightening operation is qualified.

[0020] Preferably, it also includes a connector, which comprises a mounting base and a connector; the mounting base is fixed to the second end of the housing; the connector is fixed within the mounting base and electrically connected to the controller. Signal interaction with the controller is achieved via the connector. Tightening tools are more commonly used in automated production lines where they are mounted on three-axis positioning systems or robotic arms, allowing users to automatically, efficiently, and reliably tighten screws via a controller.

[0021] Preferably, the outer wall of the housing is provided with a button, which is electrically connected to the circuit board. The button is used to control the opening and closing of the motor.

[0022] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a high-precision intelligent micro-torque electric tightening tool for screws. It achieves rapid disassembly of screwdriver bits through the cooperation of sleeve and steel ball, and can tighten screws of different models. It uses a controller and circuit board to realize torque, speed and process control, improve the control accuracy of tightening operation, has a compact structure, effectively solves user needs and industry pain points, can significantly improve assembly quality and reduce production line investment costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A schematic diagram of the tightening tool structure provided by this utility model;

[0025] Figure 2 A cross-sectional view of the housing provided for this utility model;

[0026] Figure 3 for Figure 2 Enlarged diagram of part A in the diagram;

[0027] Figure 4 A schematic diagram of the internal structure of the shell provided by this utility model;

[0028] Figure 5 This is a schematic diagram of the shell explosion provided by this utility model;

[0029] Figure 6 An exploded view of the controller provided by this utility model.

[0030] The components are as follows: 1-House; 11-Button; 2-Quick release mechanism for bit; 21-Connecting seat; 22-Protective shell; 23-Spindle; 24-Connecting shaft; 25-Half-moon connecting shaft; 26-Steel ball; 27-Sleeve; 28-Compression spring; 29-Buffer spring; 3-Connector; 31-Airplane plug mounting seat; 32-Airplane plug; 4-Drive mechanism; 41-Motor; 42-Reducer; 43-Motor mounting seat; 44-Shaft sleeve; 5-Circuit board; 51-Plug-in component; 52-Encoder; 53-Light ring; 6-Controller; 61-Household shell; 62-Base plate; 63-Touch screen; 64-Upper computer circuit board; 65-Power supply; 66-Lower computer circuit board; 67-Interface panel; 68-Connecting airplane plug; 69-Power socket. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Participate in the attached Figures 1 to 6 According to an embodiment of this utility model, a high-precision intelligent micro-torque electric screw tightening tool for screws enables quick screwdriver bit replacement, adapts to tightening different types of screws, and utilizes a controller and circuit board to regulate the output torque, achieving efficient, stable, safe, and precise tightening operations. The tool includes a gun body and a controller 6. The gun body includes a housing 1, a quick-release bit mechanism 2, a drive mechanism 4, and a circuit board 5. The housing 1 is a precision-machined one-piece aluminum shell, simple, compact, aesthetically pleasing, sturdy, and durable, with no obviously exposed screws, resulting in a stronger overall appearance. The quick-release bit mechanism 2 is compatible with commonly available 4mm shank-type and notched bit types, and includes a connecting seat 21, a hollow connecting shaft 24, a steel ball 26, a sleeve 27, a compression spring 28, and a crescent-shaped connector. Shaft 25; Connecting seat 21 is detachably connected to the first end of housing 1; Connecting shaft 24 is rotatably connected to connecting seat 21 and its first end extension extends out of connecting seat 21 to connect wing-shaped bit; A circular hole is provided on the shaft of connecting shaft 24 corresponding to its first end extension; Steel ball 26 is placed in the circular hole; Sleeve 27 is slidably sleeved on the extension and has an annular boss extending radially on its middle inner wall, and a retaining ring extending radially from the end of the extension away from connecting seat 21; Compression spring 28 is sleeved on connecting shaft 24 and its two ends abut against the annular boss and the retaining ring respectively; Sleeve 27 can slide to allow the annular boss to squeeze the steel ball 26 so that it is engaged in the groove of wing-shaped bit; Half-moon connecting shaft 25 is detachably connected to the inner cavity of the second end of connecting shaft 24 and can engage with notched bit. The crescent-shaped connecting shaft and the connecting shaft are connected by a coaxial inner sleeve, with the outer wall of the crescent-shaped connecting shaft abutting against the inner wall of the connecting shaft. This results in a more compact structure. For connecting notched (crescent-shaped) bits and wing-shaped (protruding on both sides) bits, the connecting shaft can be replaced without changing it, thus broadening its applicability. The drive mechanism 4 is fixed inside the housing 1, and its output shaft is connected to the connecting shaft 24. The circuit board 5 is fixed inside the housing 1 via a connector 51 and is electrically connected to the drive mechanism 4 to regulate its output torque and speed. The controller 6 is electrically connected to the circuit board 5 for signal processing and interaction. The controller 6 is equipped with a touch screen 63, which allows real-time viewing of tightening results and historical tightening records. Users can adjust tightening parameters and tightening processes as needed.

[0033] like Figure 2 and 3As shown, during use, the annular boss corresponding to the circular hole can press the steel ball, thus restricting its rolling. When changing the bit, pulling the sleeve compresses the spring, causing the annular boss to misalign with the circular hole. The steel ball is then free to roll within the hole. After the wing-shaped (protruding on both sides) bit is inserted into the connecting shaft, the rolling of the steel ball allows the bit's tail to insert smoothly. Releasing the sleeve's spring releases the spring's elastic restoring force, causing the sleeve to return to its original position. During this return process, the annular boss compresses the steel ball, causing it to engage in the groove at the bit's tail. The steel ball's hemisphere is positioned in the circular hole, and the other hemisphere is positioned in the bit's groove, thus completing the bit installation. For higher bits, simply pull the sleeve. The spring ensures the sleeve's restraint on the steel ball, preventing slippage during tightening and preventing the bit from loosening.

[0034] To further optimize the above technical solution, a hollow main shaft 23 is also included. The main shaft 23 is disposed within the connecting seat 21 and is connected to the output shaft of the drive mechanism 4. The second end of the connecting shaft 24 is embedded within the main shaft 23, and its outer wall can slide against the inner wall of the main shaft 23. The drive mechanism 4 includes a bushing 44, a motor 41, and a reducer 42. The bushing 44 is embedded within the main shaft 23. The motor 41 is fixed within the housing 1. The reducer 42 is keyed to the output shaft of the motor 41, and the output shaft of the reducer 42 is embedded within the bushing 44 to drive the main shaft 23 to rotate.

[0035] The motor 41 and the reducer 42 are connected by a key. A motor mounting base 43 is fixed to the inner wall of the first end of the housing 1. The motor mounting base 43 fixes the motor 41 and the reducer 42 in the inner cavity of the housing 1 near the first end, preventing the motor 41 from rotating during screw tightening. A bushing 44 is embedded in the inner cavity of the main shaft 23. The output shaft of the reducer 42 is embedded in the bushing 44. The bushing 44 is used as a coupling so that the motor 41 can drive the main shaft 23 to rotate, thereby transmitting torque to the connecting shaft 24 for screw tightening. The combination of the motor 41 and the reducer 42 can output a torque range of 0.02Nm-1.5Nm, covering the tightening needs of all small screws of M4 and below. The simple and efficient quick-release bit mechanism is compatible with common 4mm crescent-shaped and double-sided convex wing-handle type bits.

[0036] To further optimize the above technical solution, an encoder 52 is integrated on the circuit board 5 to monitor the output angle of the motor 41 and control the speed of the motor 41. The encoder integrates a motor drive algorithm, which interacts with the circuit board through the controller to preset parameters (torque, speed, angle control, etc.) and tightening processes (screw nut recognition, end speed reduction, etc.) during the tightening process.

[0037] In other specific embodiments, to prevent axial loads from impacting the motor and causing damage, and to reduce the maintenance cost of tightening tools, a buffer spring 29 is also included; the first end of the crescent-shaped connecting shaft 25 can be engaged with a notch-type bit, and the second end is bolted to the second end of the connecting shaft 24 by a pin; a limit plate is fixed on the shaft of the connecting shaft 24; a buffer groove is provided on the shaft of the main shaft 23 away from the drive mechanism 4; the pin is slidably connected in the buffer groove; the buffer spring 29 is sleeved on the connecting shaft 24 and its two ends abut against the limit plate and the two side walls of the main shaft 23 respectively.

[0038] In this embodiment, bearings are embedded in the inner walls of the connecting seat corresponding to the main shaft and the connecting shaft. The main shaft and the connecting shaft cooperate with the inner rings of the two bearings. On the one hand, the bearings can support the main shaft and the connecting shaft in the inner cavity of the connecting seat, and on the other hand, they can make the main shaft and the connecting shaft rotate synchronously.

[0039] In some other embodiments, a protective shell 22 is screwed onto the outer wall of the connector 21.

[0040] To further optimize the above technical solution and enable the understanding of the tightening degree, an LED ring 53 is also included; an assembly groove is formed on the outer wall of the second end of the housing 1; the LED ring 53 is embedded in the assembly groove and electrically connected to the circuit board 5. The LED ring 53 can emit different colors of light, such as yellow light during tightening, and green light when the preset torque is reached, sequentially indicating to the operator that the screw has been tightened properly; red light indicates that the screw is not tightened properly and the torque needs to be increased or decreased for a second tightening operation.

[0041] In some other embodiments, a buzzer is fixed to the outer wall of the housing. The buzzer is electrically connected to the circuit board, and the operator can be alerted by changes in the sound of the buzzer to the tightening status of the screws.

[0042] To further optimize the above technical solution, a button 11 is provided on the outer wall of the housing 1, and the button 11 is electrically connected to the circuit board 5. The button function can be customized through the software backend, and can be set to start and reverse switching, etc., according to user habits.

[0043] In this embodiment, a connector 3 is also included, which includes a flight plug mounting base 31 and a flight plug 32; the flight plug mounting base 31 is fixed to the second end of the housing 1; the flight plug 32 is fixed inside the flight plug mounting base 31 and electrically connected to the controller 6.

[0044] like Figure 6As shown, the controller 6 includes a housing 61, with a base plate 62 detachably connected to the bottom of the housing 61 and an interface panel 67 detachably connected to the top. The housing 61 integrates a host computer circuit board 64, a power supply 65, and a slave computer circuit board 66. A touch screen 63 is fixed to one side wall of the housing 61. The touch screen 63 is electrically connected to the power supply 65 and communicates with the host computer circuit board 64 and the slave computer circuit board 66. The interface panel 67 has multiple interfaces. A power socket 69 and a connecting plug 68 are fixed to the interface panel 67. The connecting plug 68 is connected to the connecting plug 32 via a connecting cable.

[0045] The motor can be started via buttons or the controller; torque and tightening results can be set and displayed via the touchscreen. Data during the tightening process is recorded in real time by the controller, which can store up to 500 sets of process programs and 100,000 tightening results.

[0046] The tightening tool in this embodiment incorporates significant investment in mechanics, electronics, control algorithms, software, and ergonomics, achieving industry-leading automatic tightening precision control, a user-friendly experience, and first-class quality characterized by stability, efficiency, safety, and long lifespan. It effectively addresses user needs and industry pain points, significantly improving assembly quality and reducing production line investment costs.

[0047] Example 1

[0048] This embodiment provides an application of the high-precision intelligent micro-torque electric screw tightening tool from Embodiment 1 in the automotive assembly field. In automotive assembly lines, a large number of small screws require high-precision tightening. This tightening tool, through different combinations of motor and reducer selection, adapts to a torque range of 0.02Nm-1.5Nm, meeting the tightening requirements of all small screws of M4 and below in automotive assembly. The tool is designed with axial buffer stroke, effectively preventing damage to the motor and workpiece caused by axial impact loads. Simultaneously, its quick-release bit mechanism is compatible with common 4mm crescent-shaped and double-sided convex shank bits, allowing for quick replacement of different bit sizes to adapt to screw tightening in different locations. In practical use, the tool is mounted on a robotic arm. Target tightening parameters and process steps are set via the controller's touchscreen interface. The tightening action is triggered by an external PLC control system, and the tightening result is displayed in real-time on the touchscreen, with a three-color indicator light and a buzzer indicating whether the tightening is satisfactory. Tightening data is recorded in real-time by the controller for convenient subsequent quality traceability. The use of this tool has significantly improved the efficiency and quality of automobile assembly, while reducing labor costs and error rates.

[0049] Example 2

[0050] This embodiment provides the application of a high-precision intelligent micro-torque electric screw tightening tool from Embodiment 1 in the manufacturing of 3C electronic products. In the manufacturing process of 3C electronic products, the tightening accuracy requirements for small screws are extremely high, and frequent changes of screws of different specifications are necessary. The tightening tool in this embodiment employs precision-machined structural components and an innovative, optimized motor drive algorithm, achieving a repeatability torque accuracy of ±3% and an angle accuracy of ±1%. Its ingeniously designed quick-release bit mechanism allows for rapid bit replacement by pulling the sleeve, significantly improving production efficiency. In practical applications, the tool is mounted on a three-axis coordinate positioning device, and precise tightening parameters, such as torsion, speed, and angle control, as well as complex process steps, such as screw cap recognition and end-of-line deceleration, are set via a controller. The tool provides real-time feedback on tightening data during the tightening process and alerts the operator of the tightening result via an indicator light and a buzzer. The use of this tool effectively improves the assembly accuracy and reliability of 3C electronic product manufacturing, ensuring the stability of product quality.

[0051] Example 3

[0052] This embodiment demonstrates the application of a high-precision intelligent micro-torque electric screw tightening tool from Embodiment 1 in the assembly of aerospace components. The assembly of aerospace components places extremely stringent requirements on the precision and reliability of screw tightening. This high-precision intelligent micro-torque tightening tool, through its rationally designed compact and efficient electronic circuitry and user-friendly interface, meets the high precision and reliability requirements of the aerospace field for tightening tools. The combination of the tool's motor and reducer outputs a stable torque, covering the small torque range required in aerospace component assembly. The axial buffer design and quick-release bit mechanism not only ensure the stability of the tightening process but also extend the tool's lifespan. During actual assembly, the tool connects to the assist arm, and the operator can easily set and adjust tightening parameters via the controller's touchscreen interface, ensuring that the tightening process of each screw meets stringent quality standards. Tightening data is recorded and stored in real time, facilitating subsequent quality traceability and analysis. The use of this tool provides strong support for the high-quality assembly of aerospace components, improves assembly efficiency, and reduces quality risks caused by improper tightening.

[0053] Example 4

[0054] This embodiment provides the application of a high-precision intelligent micro-torque electric screw tightening tool from Embodiment 1 in medical device manufacturing. The manufacturing of medical devices demands extremely high assembly precision and cleanliness of components. This high-precision intelligent micro-torque tightening tool plays a crucial role in medical device manufacturing. The tool's high-precision torque and angle control functions ensure the accurate assembly of critical components in medical devices. Its quick-release bit mechanism allows for rapid bit replacement in a clean environment, avoiding the risk of contamination during bit changes. The tool's controller features a user-friendly human-machine interface, allowing operators to easily set and monitor the tightening process. In practical applications, the tool is integrated with the PLC system of the medical device production line via a connector, achieving automated tightening operations. The tightening results are displayed in real-time on the controller screen, and are visually indicated to the operator via an indicator light and a buzzer. The use of this tool improves the assembly quality and efficiency of medical device manufacturing, ensuring product reliability and safety.

[0055] Example 5

[0056] This embodiment provides the application of a high-precision intelligent micro-torque electric screw tightening tool from Embodiment 1 in the manufacture of precision instruments. The manufacture of precision instruments requires high-precision screw tightening equipment to ensure the performance and stability of the instruments. This embodiment's high-precision intelligent micro-torque tightening tool, through its precise mechanical structure and advanced electronic control system, can meet the high-precision requirements for screw tightening in precision instrument manufacturing. The tool's motor and reducer combination is optimized to output stable torque, ensuring consistent screw tightening. Its quick-release bit mechanism is rationally designed, allowing for rapid replacement of different bit sizes to meet the tightening needs of various small screws in precision instruments. In practical applications, the tool is mounted on an operating table, and the operator sets precise tightening parameters and process steps through the controller's touchscreen interface. During the tightening process, the tool can monitor torque and angle in real time and store the data in the controller. The tightening result is visually indicated to the operator through an indicator light and a buzzer, ensuring that the tightening process of each screw meets quality standards. The use of this tool improves the assembly accuracy and efficiency of precision instrument manufacturing, reduces quality problems caused by improper tightening, and enhances the overall performance and reliability of the product.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-precision intelligent micro-torque electric tightening tool for screws, characterized in that, include: Shell (1), A quick-release bit mechanism (2) includes a connecting seat (21), a hollow connecting shaft (24), a steel ball (26), a sleeve (27), and a compression spring (28); the connecting seat (21) is detachably connected to the first end of the housing (1); the connecting shaft (24) is rotatably connected to the connecting seat (21), and its first end extension extends out of the connecting seat (21) to connect the bit; the connecting shaft (24) has a shaft corresponding to its first end extension. It has a round hole; the steel ball (26) is placed in the round hole; the sleeve (27) is slidably sleeved on the extension section and has an annular boss extending radially from its inner wall, and a retaining ring extending radially from the end of the extension section away from the connecting seat (21); the compression spring (28) is sleeved on the connecting shaft (24) and its two ends abut against the annular boss and the retaining ring respectively; the sleeve (27) can slide so that the annular boss can squeeze the steel ball (26) to make it fit into the groove at the tail of the screwdriver bit; A drive mechanism (4) is fixed in the inner cavity of the housing (1) and its output shaft is connected to the connecting shaft (24). Circuit board (5), which is fixed inside the housing (1) and electrically connected to the drive mechanism (4) to regulate its output torque and speed; The controller (6) is electrically connected to the circuit board (5) for signal interaction; the controller (6) is equipped with a touch screen (63) to adjust tightening parameters and tightening process.

2. The high-precision intelligent micro-torque electric tightening tool for screws according to claim 1, characterized in that, The quick-release mechanism (2) for the bit also includes a crescent-shaped connecting shaft (25), which is detachably connected to the inner cavity of the second end of the connecting shaft (24) and can be engaged with the bit.

3. A high-precision intelligent micro-torque electric tightening tool for screws according to claim 2, characterized in that, It also includes a hollow main shaft (23), which is located in the connecting seat (21) and is connected to the output shaft of the drive mechanism (4); the second end of the connecting shaft (24) is embedded in the main shaft (23) and its outer wall can slide against the inner wall of the main shaft (23).

4. A high-precision intelligent micro-torque electric tightening tool for screws according to claim 3, characterized in that, It also includes a buffer spring (29); the first end of the crescent connecting shaft (25) can be engaged with the notch bit, and the second end is bolted to the second end of the connecting shaft (24) by a pin; a limit plate is fixed on the shaft of the connecting shaft (24); a buffer groove is provided on the shaft of the main shaft (23) away from the drive mechanism (4); the pin is slidably connected in the buffer groove; the buffer spring (29) is sleeved on the connecting shaft (24) and its two ends abut against the limit plate and the two side walls opposite to the main shaft (23), respectively.

5. A high-precision intelligent micro-torque electric tightening tool for screws according to claim 3, characterized in that, The drive mechanism (4) includes a bushing (44), a motor (41), and a reducer (42); the bushing (44) is embedded in the main shaft (23); the motor (41) is fixed in the housing (1); the reducer (42) is keyed to the output shaft of the motor (41), and the output shaft of the reducer (42) is embedded in the bushing (44) to drive the main shaft (23) to rotate.

6. A high-precision intelligent micro-torque electric tightening tool for screws according to claim 5, characterized in that, The circuit board (5) integrates an encoder (52) to monitor the output angle of the motor (41) and control the speed of the motor (41).

7. A high-precision intelligent micro-torque electric tightening tool for screws according to claim 6, characterized in that, It also includes a lamp ring (53); the outer wall of the second end of the housing (1) is provided with an assembly groove; the lamp ring (53) is embedded in the assembly groove and electrically connected to the circuit board (5).

8. A high-precision intelligent micro-torque electric tightening tool for screws according to claim 1, characterized in that, It also includes a connector (3), which includes a plug mounting base (31) and a plug (32); the plug mounting base (31) is fixed to the second end of the housing (1); the plug (32) is fixed inside the plug mounting base (31) and electrically connected to the controller (6).

9. A high-precision intelligent micro-torque electric tightening tool for screws according to claim 1, characterized in that, The outer wall of the housing (1) is provided with a button (11), which is electrically connected to the circuit board (5).

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