Electronic torque limiting electric screwdriver

Abstract

The utility model discloses an electronic limited twist electric screwdriver relates to electric screwdriver technical field, including the casing, the one end of casing is equipped with by motor drive rotation's batch head, and motor is connected with control module electricity, and control module includes: current detection module, ADC module, storage module and main control module, and current detection module passes through current sampling circuit and converts motor current into analog signal, and ADC module converts the analog signal of current detection module output into digital value, and the storage module in memory has the torque threshold value corresponding to different gears, and main control module compares current ADC value with the threshold value of current gear in real time, and according to the comparison result control alarm module opens and closes. This electronic limited twist electric screwdriver, torque control accurate, long service life, use more convenient.

Description

Technical Field

[0001] This utility model relates to the field of electric screwdriver technology, specifically to an electronically torque-limiting electric screwdriver. Background Technology

[0002] Traditional electronic torque-limiting electric screwdrivers generally employ mechanical torque limiting. Mechanical torque limiting devices rely on physical structures such as springs or friction plates to limit torque. These structures are prone to plastic deformation or wear after prolonged high-load operation, leading to torque threshold deviations. Repeated calibration is required to maintain accuracy, and they are difficult to adapt to the precise control demands of dynamic working conditions. Furthermore, the response delay and non-linear characteristics of mechanical torque limiting systems can easily cause screws to be overtightened or loosened, affecting assembly quality. Although existing technologies attempt to improve stability by modifying the torsion spring limiting structure (such as adding limiting blocks and guide ramps), their accuracy remains relatively low.

[0003] Therefore, it is necessary to propose an electronically torque-limiting electric screwdriver to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide an electronically controlled torque-limiting electric screwdriver to solve the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: It includes a housing, one end of which is provided with a screwdriver bit driven to rotate by a motor. The motor is electrically connected to a control module, which includes:

[0008] A current detection module, which converts the motor current into an analog signal through a current sampling circuit;

[0009] An ADC module that converts the analog signal output by the current detection module into a digital value;

[0010] A storage module, wherein the storage module stores torque thresholds corresponding to different gear positions;

[0011] The main control module compares the current ADC value with the threshold of the current gear in real time, and controls the alarm module to open or close based on the comparison result.

[0012] Preferably, the motor is a brushless motor.

[0013] Preferably, the alarm module includes a buzzer.

[0014] Preferably, the housing has a grip in the middle, a start / stop button is rotatably connected to one side of the grip, and a forward / reverse button is provided on the other side of the housing corresponding to the start / stop button.

[0015] Preferably, a plurality of LED lights are fixedly connected to one end of the housing where the bit is located, and the plurality of LED lights are evenly distributed along the circumference of the bit.

[0016] Preferably, the top of the housing is provided with a speed adjustment button and a display screen. The speed adjustment button is used to adjust the motor speed, and the display screen is used to display the current speed gear of the motor.

[0017] Preferably, a storage battery is fixedly connected inside the housing, and a charging interface is provided at the top of the housing.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, this utility model provides an electronically controlled torque-limiting electric screwdriver, which has the following beneficial effects:

[0020] 1. This electronic torque-limiting electric screwdriver adopts an electronic torque-limiting solution, which provides precise torque control, long service life, and eliminates the need for frequent maintenance.

[0021] 2. This electronic torque-limiting electric screwdriver is designed with ergonomics in mind, making it convenient and flexible to use. It also features LED lighting and a torque-limiting buzzer, enhancing the user experience. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional schematic diagram of the base of this utility model;

[0024] Figure 3 This is a flowchart illustrating the present invention.

[0025] In the diagram: 1. Control module; 2. Forward / reverse button; 3. Start / stop button; 4. Battery; 5. Housing; 6. Motor; 7. LED light; 8. Bit; 9. Speed ​​control button; 10. Display screen; 11. Charging interface; 12. Grip. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Please see Figure 1-3As shown, the device includes a housing 5, with a bit 8 driven to rotate by a motor 6 at one end. The motor 6 is electrically connected to a control module 1. The control module 1 includes a current detection module, an ADC module, a storage module, and a main control module. The current detection module converts the current of the motor 6 into an analog signal through a current sampling circuit. The ADC module converts the analog signal output by the current detection module into a digital value. The storage module stores torque thresholds corresponding to different gear positions. The main control module compares the current ADC value with the threshold of the current gear position in real time and controls the alarm module to open or close based on the comparison result.

[0028] Before use, the torque thresholds corresponding to different gears are stored in the storage module. The current detection module acquires the dynamic current parameters of motor 6 in real time based on the current sampling circuit and converts them into standard analog signals, which are then output to the ADC module. The ADC module digitizes the analog signals. The main control module reads the ADC data stream and synchronously matches the current gear index address to retrieve the corresponding threshold parameters. When the real-time current value is detected to exceed the set threshold, the alarm module is immediately activated. Specifically, the alarm module is a buzzer.

[0029] To improve service life, motor 6 uses a brushless motor.

[0030] In some embodiments, to make it easier to operate, a grip portion 12 is provided in the middle of the housing 5, and a start / stop button 3 is rotatably connected above one side of the grip portion 12. A forward / reverse button 2 is provided on the other side of the housing 5 corresponding to the start / stop button 3.

[0031] In use, hold the grip part 12 with your hand and press the start / stop button 3 with your index finger. When the start / stop button 3 is pressed down, the motor 6 is connected to the power supply. When you release your index finger, the start / stop button 3 resets, and the motor 6 is disconnected from the power supply, making the start and stop operation of the motor 6 more convenient. When you need to control its forward and reverse rotation, press the forward and reverse button 2 with your thumb to adjust the forward and reverse rotation of the motor 6. Compared with existing electric screwdrivers, the optimized position of the motor 6 switch and the forward and reverse switch makes it more convenient to use.

[0032] In some embodiments, a plurality of LED lights 7 are fixedly connected to one end of the housing 5 where the bit 8 is located, and the plurality of LED lights 7 are evenly distributed around the circumference of the bit 8. By providing the LED lights 7, auxiliary lighting can be provided at the operating point.

[0033] To allow for a clear view of the gear position, the top of the housing 5 is equipped with a speed adjustment button 9 and a display screen 10. The speed adjustment button 9 is used to adjust the speed of the motor 6, and the display screen 10 is used to display the gear position of the current speed of the motor 6.

[0034] To make it more convenient to use and avoid the power cord affecting operation, a storage battery 4 is fixedly connected inside the housing 5. The storage battery 4 supplies power to the motor 6 and the control module 1. A charging interface 11 is provided at the top of the housing 5. Both the charging interface 11 and the storage battery 4 are connected to the power management module.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electronically controlled torque-limiting electric screwdriver, comprising a housing (5), wherein one end of the housing (5) is provided with a screwdriver bit (8) driven to rotate by a motor (6), characterized in that: The motor (6) is electrically connected to the control module (1), and the control module (1) includes: The current detection module converts the motor (6) current into an analog signal through a current sampling circuit; An ADC module that converts the analog signal output by the current detection module into a digital value; A storage module, wherein the storage module stores torque thresholds corresponding to different gear positions; The main control module compares the current ADC value with the threshold of the current gear in real time, and controls the alarm module to open or close based on the comparison result.

2. The electronic torque-limiting electric screwdriver according to claim 1, characterized in that: The motor (6) is a brushless motor.

3. The electronic torque-limiting electric screwdriver according to claim 1, characterized in that: The alarm module includes a buzzer.

4. The electronic torque-limiting electric screwdriver according to claim 1, characterized in that: The housing (5) has a grip (12) in the middle, and a start / stop button (3) is rotatably connected above one side of the grip (12). The housing (5) has a forward / reverse button (2) on the other side corresponding to the start / stop button (3).

5. The electronic torque-limiting electric screwdriver according to claim 1, characterized in that: The housing (5) has a screwdriver bit (8) at one end, and a plurality of LED lights (7) are fixedly connected thereto. The plurality of LED lights (7) are evenly distributed around the screwdriver bit (8).

6. The electronic torque-limiting electric screwdriver according to claim 1, characterized in that: The top of the housing (5) is provided with a speed adjustment button (9) and a display screen (10). The speed adjustment button (9) is used to adjust the speed of the motor (6), and the display screen (10) is used to display the gear to which the current speed of the motor (6) belongs.

7. The electronic torque-limiting electric screwdriver according to claim 1, characterized in that: A battery (4) is fixedly connected inside the housing (5), and a charging interface (11) is provided at the top of the housing (5).

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