Control circuit of grinding machine

Abstract

The utility model discloses a control circuit of a grinding machine. The polishing machine comprises a processor, a voltage stabilizing circuit, an input and output assembly, a switch control assembly, a 5V boosting module, a switch assembly, a motor driving module and a digital display screen, the input and output assembly comprises a motor output end and a charger input end, the motor output end is connected with a polishing motor, and the motor output end is connected with the processor through the motor driving module. One end of the voltage stabilizing circuit is connected with the processor, the other end of the voltage stabilizing circuit is connected with a rechargeable lithium battery, the rechargeable lithium battery is connected with the input end of the charger through a 5V boosting module, a charging overvoltage protection unit is connected between the 5V boosting module and the input end of the charger, and the switch control assembly, the switch assembly and the digital display screen are all connected with the processor. The utility model has the beneficial effects that the safe and reliable work of the grinding machine is ensured; the working state and fault information of the grinding machine can be visually known in real time, and therefore the grinding machine can be maintained in time.

Description

Technical Field

[0001] This utility model relates to the technical field of grinding machines, and in particular to a control circuit for a grinding machine. Background Technology

[0002] Nail filers, as power tools specifically designed for filing, trimming, and polishing nails, hold an important position in the beauty and nail industry. The working principle of a nail filer is that a motor drives a rotating shaft, transmitting power to the rotor tip, causing the rotor tip to rotate at high speed. When the rotor tip contacts the nail, it transfers kinetic energy to the nail, thus filing it. However, existing nail filers often have relatively simple functions, only possessing a single filing function. During use, issues such as overvoltage or undervoltage can cause the device to malfunction, and the lack of real-time monitoring of the filer's operating status makes it prone to breakdowns and difficult to address promptly. Utility Model Content

[0003] The present invention aims to overcome the aforementioned deficiencies in the prior art and provides a safe, reliable control circuit for a grinding machine that can monitor its working status in real time.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A control circuit for a polishing machine includes a processor, a voltage regulator circuit, an input / output component, a switch control component, a 5V boost module, a switch component, a motor drive module, and a digital display screen. The input / output component includes a motor output terminal and a charger input terminal. The motor output terminal is connected to a polishing motor and is connected to the processor via the motor drive module. One end of the voltage regulator circuit is connected to the processor, and the other end is connected to a rechargeable lithium battery. The rechargeable lithium battery is connected to the charger input terminal via the 5V boost module. An overvoltage protection unit is connected between the 5V boost module and the charger input terminal. The switch control component, the switch component, and the digital display screen are all connected to the processor.

[0006] The design incorporates a voltage regulator circuit to provide a stable operating voltage for the grinder. The input / output components control the grinder motor and power the charger. A switch control module manages different operating states. A 5V boost module and overvoltage protection unit protect the grinder's charging voltage, ensuring safe and reliable operation. The switch module controls forward / reverse rotation, on / off switching, and speed adjustment. A motor drive module ensures safer and more reliable motor operation. A digital display provides a clear, real-time view of the grinder's operating status and fault information, facilitating timely maintenance.

[0007] Preferably, the input / output components also include a USB output terminal, which is connected to a 5V boost module via a charging overvoltage protection unit. This USB output terminal design allows the grinder to be used as a power bank, providing power to external devices.

[0008] Preferably, the switch control component includes a speed control switch group and a breathing light group. The speed control switch group is connected to the processor, one end of the breathing light group is connected to the voltage regulator circuit, and the other end of the breathing light group is connected to the processor. The breathing light group design allows for real-time monitoring of the grinder's operating status. Furthermore, its integration with the digital display screen enables better feedback on the grinder's operating status, ensuring reliable operation.

[0009] Preferably, the speed control switch group includes a power switch and a speed switch, both of which are connected to the processor.

[0010] Preferably, the switching assembly includes a forward switch and a reverse switch, both of which are connected to the processor.

[0011] Preferably, the speed control switch group is an encoder, a touch switch, or a potentiometer.

[0012] Preferably, the switch assembly is one of a push-button switch, a touch switch, or a potentiometer.

[0013] The beneficial effects of this utility model are: ensuring the safe and reliable operation of the grinding machine; enabling intuitive and real-time understanding of the working status and fault information of the grinding machine, thereby achieving timely maintenance of the grinding machine. Attached Figure Description

[0014] Figure 1 This is a circuit block diagram of this utility model;

[0015] Figure 2 This is the circuit schematic diagram of this utility model.

[0016] In the diagram: 1. Processor, 2. Voltage regulator circuit, 3. Input / output components, 4. Switch control components, 5. 5V boost module, 6. Switch components, 7. Motor drive module, 8. Digital display screen, 9. Rechargeable lithium battery, 10. Charging overvoltage protection unit, 11. Charger input terminal, 12. Motor output terminal, 13. USB output terminal, 14. Speed ​​control switch group, 15. Breathing light group, 16. Forward switch, 17. Reverse switch. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 , Figure 2 In the described embodiment, a control circuit for a polishing machine includes a processor 1 (U2), a voltage regulator circuit 2 (U1), an input / output component 3, a switch control component 4, a 5V boost module 5 (U4), a switch component 6, a motor drive module 7 (U3), and a digital display screen 8 (DIS). The input / output component 3 includes a motor output terminal 12 (MOT / large) and a charger input terminal 11 (VIN / small). The motor output terminal 12 is connected to a polishing motor and is connected to the processor 1 via the motor drive module 7. One end of the voltage regulator circuit 2 is connected to the processor 1, and the other end of the voltage regulator circuit 2 is connected to a rechargeable lithium battery 9 (J1 / BAT). The rechargeable lithium battery 9 is connected to the charger input terminal 11 via the 5V boost module 5. A charging overvoltage protection unit 10 (Q01 / Q02) is connected between the 5V boost module 5 and the charger input terminal 11. The switch control component 4, the switch component 6, and the digital display screen 8 are all connected to the processor 1. Input / output component 3 also includes a USB output terminal 13, which is connected to the 5V boost module 5 via a charging overvoltage protection unit 10. Switch control component 4 includes a speed control switch group 14 (KW1 / SW) and a breathing light group 15 (L1 / L2 / L3 / L4). The speed control switch group 14 is connected to the processor 1, one end of the breathing light group 15 is connected to the voltage regulator circuit 2, and the other end is connected to the processor 1. The speed control switch group 14 includes a power switch (SW) and a speed switch (KW1), both of which are connected to the processor 1. Switch component 6 includes a forward switch 16 (KEY1 / TK1) and a reverse switch 17 (KEY2 / TK2), both of which are connected to the processor 1. The speed control switch group 14 uses an encoder, a touch switch, or a potentiometer. Switch component 6 uses a push-button switch, a touch switch, or a potentiometer.

[0019] The specific implementation is as follows: This grinder is powered by a rechargeable lithium battery or a charging adapter, and the processor is a dedicated MCU main controller. It has a customized digital display screen for output display, multi-channel input control, and multiple protection features.

[0020] Main control unit: Main control MCU (U2) + voltage regulator U1; Power supply unit: 5V boost module U4; Protection unit: Overvoltage protection unit Q01\Q02 and its peripheral components; Display unit: Digital display screen DIS; Motor drive unit: U3 and its peripheral components; Switch button unit: SW, KW1, KEY1, KEY2, TK1, TK2, TK3, TK5 and their peripheral components; Breathing light unit: L1, L2, L3, L4; Input / output components (internal and external): J2, J3, VIN / small, MOT / large, USB output discharge.

[0021] Specifically:

[0022] 1. Plug in the power. The digital display (DIS) will flash briefly and then turn off. The power switch SW uses a potentiometer to turn on the device and enter standby mode. By default, the digital display (DIS) shows "00" for the gear position, "F" for the battery indicator, and a clockwise indicator. Devices with a logo will display their logo; devices without a logo will not display anything.

[0023] 2: Use the potentiometer to adjust the speed of the speed switch (KW1) to determine the gear 0-30 (or 0-35 or 0-40 or 0-45, etc.). When the grinding motor is working, the higher the gear, the faster the speed.

[0024] 3: Determine whether to implement stall protection based on customer requirements; or at which level to initiate protection (this function can be achieved simply by using preset values ​​within the processor).

[0025] 4: Connect to a universal USB 5V charging port or a professional charger or adapter. The 5V power supply charges the dedicated rechargeable lithium battery (J1 / BAT) of this grinder through a 5V boost module (U4). The battery status during the process is displayed and indicated by the battery symbol on the digital display (DIS) of this grinder.

[0026] 5. During operation, the machine is powered by a rechargeable lithium battery (J1 / BAT) or an adapter. The grinding motor (MOT / large) is controlled by a multi-input switch (KW1, KEY1, KEY2 or TK1, TK2, TK3, TK5). The forward rotation switch KEY1 / TK1, in conjunction with the reverse rotation switch KEY2 / TK2, controls the forward and reverse rotation of the grinding motor (MOT / large). Simultaneously, the digital display (DIS) shows a forward rotation (F) indicator and a reverse rotation motor speed (R) indicator. The speed switch KW1 inputs an adjustment command to control the speed of the grinding motor (MOT / large), and its speed level is displayed by two numbers on the digital display (DIS). During operation, if there is a logo, each logo will light up simultaneously, and the breathing light group L1, L2, L3, and L4 will also light up.

[0027] 6: During operation, briefly press the reverse switch (KEY2 / TK2) to pause, the pause symbol on the digital display (DIS) will light up, and the grinding motor will stop rotating.

[0028] 7. During operation, when the grinding motor is overloaded, the main controller U2 outputs a control command, the digital display screen (DIS) displays a stall protection warning, and the grinding motor stops rotating.

[0029] 8: Overvoltage protection function: When the input voltage exceeds 5V and rises to 6.5V-24V, the charging protection unit (Q01\Q02 and its peripheral devices) of this grinder will be activated.

[0030] 9: USB external output function (power bank): Input / output external component USB discharge output port, plug in the corresponding external USB male socket, connect external devices, and you can discharge to the outside.

[0031] 10: Low battery alarm display: When the rechargeable lithium battery (J1 / BAT) of this grinder is lower than the minimum protection voltage value of the battery (wherein: the minimum protection voltage value of the battery is preset inside the processor), the battery symbol on the digital display screen (DIS) will flash as a warning.

[0032] 11: Foot pedal function: Control the operation of the grinding motor through the external input interface J3.

Claims

1. A control circuit for a grinding machine, characterized in that, The system includes a processor (1), a voltage regulator circuit (2), an input / output component (3), a switch control component (4), a 5V boost module (5), a switch component (6), a motor drive module (7), and a digital display screen (8). The input / output component (3) includes a motor output terminal (12) and a charger input terminal (11). The motor output terminal (12) is connected to a grinding motor. The motor output terminal (12) is connected to the processor (1) through the motor drive module (7). One end of the voltage regulator circuit (2) is connected to the processor (1), and the other end of the voltage regulator circuit (2) is connected to a rechargeable lithium battery (9). The rechargeable lithium battery (9) is connected to the charger input terminal (11) through the 5V boost module (5). A charging overvoltage protection unit (10) is connected between the 5V boost module (5) and the charger input terminal (11). The switch control component (4), the switch component (6), and the digital display screen (8) are all connected to the processor (1).

2. The control circuit for a grinder according to claim 1, characterized in that, The input / output component (3) also includes a USB output terminal (13), which is connected to the 5V boost module (5) through the charging overvoltage protection unit (10).

3. The control circuit for a grinder according to claim 1, characterized in that, The switch control component (4) includes a speed control switch group (14) and a breathing light group (15). The speed control switch group (14) is connected to the processor (1). One end of the breathing light group (15) is connected to the voltage regulator circuit (2), and the other end of the breathing light group (15) is connected to the processor (1).

4. The control circuit for a grinder according to claim 3, characterized in that, The speed control switch group (14) includes a power switch and a speed switch, both of which are connected to the processor (1).

5. The control circuit for a grinder according to claim 1, characterized in that, The switch assembly (6) includes a forward switch (16) and a reverse switch (17), both of which are connected to the processor (1).

6. The control circuit for a grinder according to claim 3 or 4, characterized in that, The speed control switch group (14) is an encoder, a touch switch or a potentiometer.

7. A control circuit for a grinding machine according to claim 1 or 5, characterized in that, The switch assembly (6) is one of a push button switch, a touch switch, or a potentiometer.

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