Double-switch control module of riding type mower

Abstract

The utility model provides a double-switch control module of a riding type mowing machine, which is arranged on a mowing machine main body, is powered by a battery and comprises a first function switch, a second function switch, a display control unit, a driving safety control unit and a controller area network (CAN) bus communication unit, one end of the first function switch and one end of the second function switch are simultaneously connected with the battery, the other end of the first function switch is connected with the input end of the display control unit, and the other end of the second function switch is connected with the input end of the driving safety control unit. The output end of the driving safety control unit is connected with a motor for controlling walking of the mower and running of a cutter head, the output end of the display control unit is connected with an auxiliary function assembly of the mower, and the CAN bus communication unit is connected between the display control unit and the driving safety control unit. According to the utility model, the independent use of partial functions of the riding lawn mower is realized, the energy consumption is reduced, the accidental starting of the lawn mower caused by mistaken touch is avoided, and the use safety of the riding lawn mower is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a double switch control module of a riding lawn mower. Background Art

[0002] The riding lawn mowers on the market usually adopt a dual-switch design, which does play a role in safety when the machine is required to operate at full function. However, it also has certain inconveniences in use. For example, when the user only wants to use the riding lawn mower to charge a mobile phone or other electrical appliances, or only needs to turn on the lighting function of the lawn mower, since starting the riding lawn mower requires both switches to be turned on at the same time, it is very likely that the lawn mower will start accidentally due to accidentally touching the operating lever, increasing the risk of using the lawn mower and making it less safe. In addition, this design means that even if the lawn mower is not in full-function use, all modules in it remain in a powered state, which will undoubtedly increase unnecessary energy consumption and reduce the efficiency of the machine. Utility Model Content

[0003] The purpose of the utility model is to overcome the disadvantages of the prior art that, in the process of using a dual-switch controlled riding lawn mower, when only part of the functions of the riding lawn mower are applied, it is easy to be accidentally touched, the safety is low, and all modules of the riding lawn mower need to be powered, which will increase unnecessary energy consumption. A dual-switch control module for a riding lawn mower is provided, wherein a first function switch and a second function switch respectively control different functions of the lawn mower, and only when the first function switch and the second function switch are turned on at the same time and the correspondingly connected display control unit and the drive safety control unit establish a communication connection, the motor for controlling the travel of the lawn mower and the operation of the cutter disc will be started, and part of the functions of the riding lawn mower can be used separately, which avoids unnecessary energy consumption increase and avoids the accidental start-up of the lawn mower due to accidental touching of the operating lever, and can also retain the safety protection role played by the dual-switch design when the lawn mower is fully functional.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A dual switch control module for a riding lawn mower is arranged on a lawn mower body and powered by a battery, comprising a first function switch, a second function switch, a display control unit, a drive safety control unit and a CAN bus communication unit, wherein one end of the first function switch and the second function switch are simultaneously connected to the battery, the other end of the first function switch is connected to an input end of the display control unit, the other end of the second function switch is connected to an input end of the drive safety control unit, an output end of the drive safety control unit is connected to a motor for controlling the walking and operation of a blade of the lawn mower, an output end of the display control unit is connected to an auxiliary function component of the lawn mower, the CAN bus communication unit is connected between the display control unit and the drive safety control unit, and the CAN bus communication unit establishes a communication connection between the display control unit and the drive safety control unit according to the switch states of the first function switch and the second function switch.

[0006] Further, the CAN bus communication unit includes a CAN transceiver chip, a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a diode D1, a diode D2, a diode D3 and a connector JP1, the display control unit is connected to a signal receiving pin of the CAN transceiver chip through a receiving end of the CAN bus, the display control unit is also connected to a signal sending pin of the CAN transceiver chip through a sending end of the CAN bus, the signal sending pin of the CAN transceiver chip is also connected to a first voltage output end of a battery through a resistor R1, a high-order data output pin of the CAN transceiver chip is connected to one of the pins of the connector JP1, a low-order data output pin of the CAN transceiver chip is connected to another pin of the connector JP1, a resistor R2 is further connected between the high-order data output pin and the low-order data output pin, a diode D1 is further connected in parallel at both ends of the resistor R2, the high-order data output pin is grounded through the capacitor C1, the high-order data output pin is also grounded through the diode D2, the low-order data output pin is grounded through the capacitor C2, and the low-order data output pin is also grounded through the diode D3.

[0007] Furthermore, the diode D1 , the diode D2 and the diode D3 are all bidirectional TVS diodes.

[0008] Furthermore, a driving unit is arranged between the output end of the driving safety control unit and the motor for controlling the movement of the lawn mower and the operation of the blade disc, and the driving unit includes a driving circuit and a self-test circuit, and both the self-test circuit and the driving circuit are connected to the driving safety control unit, and the self-test circuit is also connected to the driving circuit, and the driving circuit is also connected to the motor for controlling the movement of the lawn mower and the operation of the blade disc.

[0009] Furthermore, the auxiliary function component includes an LCD screen, a USB charging port and a lawn mower light, the LCD screen is connected to a control signal output end of the LCD screen of the display control unit, the USB charging port is connected to a control signal output end of the USB charging port of the display control unit, and the lawn mower light is connected to a control signal output end of the lawn mower light of the display control unit.

[0010] Furthermore, an LCD screen backlight control circuit is also arranged between the LCD screen and the control signal output end of the LCD screen of the display control unit, and the LCD screen backlight control circuit includes a resistor R3, a resistor R4 and a MOS tube Q1, a gate of the MOS tube Q1 is connected to the control signal output end of the LCD screen of the display control unit, a source of the MOS tube Q1 is grounded, a drain of the MOS tube Q1 is connected to the LCD screen through the resistor R3, and a resistor R4 is also connected between the gate of the MOS tube Q1 and the source of the MOS tube Q1.

[0011] Furthermore, a USB charging control circuit is also provided between the USB charging port and the control signal output end of the USB charging port of the display control unit. The USB charging control circuit includes a transistor Q2, a MOS transistor Q3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C3, a capacitor C4 and a capacitor C5. The base of the transistor Q2 is connected to the control signal output end of the USB charging port of the display control unit through the resistor R5, the emitter of the transistor Q2 is grounded, and a resistor R6 is further connected between the base and the emitter of the transistor Q2. The collector of the transistor Q2 is connected to the gate of the MOS transistor Q3 through the resistor R7, the source of the MOS transistor is connected to the second voltage output end of the battery, and a resistor R8 is further connected between the source and the gate of the MOS transistor Q3. The source of the MOS transistor Q3 is also grounded through the capacitor C3, and the two ends of the capacitor C3 are also connected in parallel with a capacitor C4. The drain of the MOS transistor Q3 is connected to the USB charging port to output a charging voltage, and the drain of the MOS transistor Q3 is also grounded through the capacitor C5.

[0012] Furthermore, a lawn mower lamp control circuit is provided between the lawn mower lamp and the control signal output end of the lawn mower lamp of the display control unit, and the lawn mower lamp control circuit includes a connector JP2 and a switch control subcircuit, the positive pole of the lawn mower lamp is connected to one of the pins of the connector JP2, the negative pole of the lawn mower lamp is connected to the output end of the switch control subcircuit, and the input end of the switch control subcircuit is connected to the control signal output end of the lawn mower lamp of the display control unit.

[0013] Furthermore, the switch control subcircuit includes a switch element, a voltage-stabilizing capacitor, a protection element and a voltage-dividing resistor. The control end of the switch element is the input end of the switch control subcircuit, the control end of the switch element is connected to the control signal output end of the lawn mower light of the display control unit, one end of the switch element is grounded, and the other end of the switch element is connected to the negative electrode of the lawn mower light through the protection element. A voltage-dividing resistor is also connected between the control end of the switch element and one end of the switch element, and the negative electrode of the lawn mower light is also grounded through the voltage-stabilizing capacitor.

[0014] Furthermore, the lawn mower light includes a headlight, a width light, a reverse light and a tail light, and each of the headlight, the width light, the reverse light and the tail light is correspondingly provided with a switch control subcircuit.

[0015] The beneficial effects of the utility model are:

[0016] The first function switch and the second function switch respectively control different functions of the lawn mower. Only when the first function switch and the second function switch are turned on at the same time and the correspondingly connected display control unit and the drive safety control unit establish a communication connection, will the motor for controlling the travel and operation of the blade of the lawn mower be started. Some functions of the riding lawn mower can be used separately, which avoids unnecessary energy consumption and accidental start-up of the lawn mower due to accidental touching of the operating lever. The safety protection role of the dual switch design when the lawn mower is running at full function can also be retained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a circuit diagram of a CAN bus communication unit of an embodiment of the utility model;

[0019] Figure 3 This is a circuit diagram of a complete control circuit of an LCD screen according to an embodiment of the utility model;

[0020] Figure 4 This is a circuit diagram of a USB charging control circuit according to an embodiment of the utility model;

[0021] Figure 5 It is a circuit diagram of a complete control circuit of a lawn mower light according to an embodiment of the utility model;

[0022] Figure 6 This is a pin connection diagram of a display control unit according to an embodiment of the utility model.

[0023] Among them: 1. first function switch, 2. second function switch, 3. display control unit, 4. drive safety control unit, 5. CAN bus communication unit, 6. battery, 7. motor, 8. auxiliary function component, 81. LCD screen, 82. USB charging port, 83. lawn mower light. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Example:

[0026] A dual switch control module for a riding lawn mower is provided on the main body of the lawn mower and is powered by a battery 6. Figure 1 As shown, it includes a first function switch 1, a second function switch 2, a display control unit 3, a drive safety control unit 4 and a CAN bus communication unit 5, one end of the first function switch and the second function switch are connected to the battery at the same time, the other end of the first function switch is connected to the input end of the display control unit, the other end of the second function switch is connected to the input end of the drive safety control unit, the output end of the drive safety control unit is connected to a motor 7 for controlling the walking and blade operation of the lawn mower, the output end of the display control unit is connected to an auxiliary function component 8 of the lawn mower, the CAN bus communication unit is connected between the display control unit and the drive safety control unit, and the CAN bus communication unit establishes a communication connection between the display control unit and the drive safety control unit according to the switch states of the first function switch and the second function switch.

[0027] The first function switch and the second function switch are both set on the riding lawn mower. The user can choose one of the function switches to turn on according to their functional needs, so as to realize the separate use of some functions. For example, if the first function switch is turned on alone, the auxiliary function components can be used, such as using the LCD screen to view the basic information of the machine, or charging and powering other electrical devices through the USB port, and the light on the riding lawn mower can also be used for lighting.

[0028] When the second function switch is turned on alone, the drive safety control unit will be powered on, but it will only perform self-checks on the drive and safety parts, and will not directly drive the motor.

[0029] Only when the first function switch and the second function switch are turned on at the same time and the first function switch and the second function switch establish a communication connection through the CAN bus communication unit, will the driving safety control unit drive the motor to start.

[0030] Specifically, the CAN transceiver chip described in this embodiment adopts a TPT1256-SO1R chip, such as Figure 2As shown, the CAN bus communication unit includes a CAN transceiver chip U1, a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a diode D1, a diode D2, a diode D3 and a connector JP1. The display control unit is connected to the signal receiving pin RXD of the CAN transceiver chip through the receiving end of the CAN bus, that is, CAN0_RX. The display control unit is also connected to the signal sending pin TXD of the CAN transceiver chip through the transmitting end of the CAN bus, that is, CAN0_TX. The signal sending pin TXD of the CAN transceiver chip is also connected to the first voltage output end of the battery through the resistor R1. The high-order data output pin CANH of the CAN transceiver chip is connected to pin 2 of the connector JP1, and the low-order data output pin CANL of the CAN transceiver chip is connected to pin 3 of the connector JP1. A resistor R2 is also connected between the high-order data output pin CANH and the low-order data output pin CANL. A diode D1 is also connected in parallel at both ends of the resistor R2. The high-order data output pin is grounded through a capacitor C1, and the high-order data output pin is also grounded through a diode D2. The low-order data output pin CANL is grounded through a capacitor C2, and the low-order data output pin CANL is also grounded through a diode D3.

[0031] In order to ensure the normal application of the CAN transceiver chip U1 and the connector JP1, the basic circuits corresponding to the CAN transceiver chip U1 and the connector JP1 are also set. Specifically, the GND pin of the CAN transceiver chip U1 is grounded, the VCC pin is connected to the third voltage output terminal of the battery, and a capacitor C6 is connected between the GND pin and the VCC pin, and its S pin is grounded through a resistor R9, and its VIO pin is connected to the first voltage output terminal of the battery, and the VIO pin is also grounded through a capacitor C7. Pin 1 of the connector JP1 is connected to the third voltage output terminal of the battery, and pin 1 of the connector JP1 is also grounded through a capacitor C8, and pin 4 of the connector JP1 is directly grounded.

[0032] Furthermore, the diode D1 , the diode D2 and the diode D3 are all bidirectional TVS diodes.

[0033] A driving unit is also arranged between the output end of the driving safety control unit and the motor for controlling the movement of the lawn mower and the operation of the cutter disc. The driving unit includes a driving circuit and a self-test circuit. Both the self-test circuit and the driving circuit are connected to the driving safety control unit. The self-test circuit is also connected to the driving circuit. The driving circuit is also connected to the motor for controlling the movement of the lawn mower and the operation of the cutter disc.

[0034] The control behavior of the driving safety control unit is specifically set according to the switch states of the first function switch and the second function switch, and the communication connection state between the driving safety control unit and the display control unit.

[0035] Specifically, when only the second function switch is turned on, or when both the first function switch and the second function switch are turned on, but the communication connection between the driving safety control unit and the display control unit is not established, the driving safety control unit only starts the self-check circuit, and performs self-checks on the driving circuit and the safety parts related to the driving unit through the self-check circuit. Only when both the first function switch and the second function switch are turned on, and the communication connection between the driving safety control unit and the display control unit is established, will the driving safety control unit start the driving circuit, thereby driving the motor to run, and controlling the travel of the riding lawn mower and the rotation of the cutter disc.

[0036] The auxiliary function component includes an LCD screen 81, a USB charging port 82 and a lawn mower light 83. The LCD screen is connected to the control signal output end of the LCD screen of the display control unit, the USB charging port is connected to the control signal output end of the USB charging port of the display control unit, and the lawn mower light is connected to the control signal output end of the lawn mower light of the display control unit.

[0037] An LCD screen backlight control circuit is also provided between the LCD screen and the control signal output end of the LCD screen of the display control unit. The LCD screen backlight control circuit includes a resistor R3, a resistor R4 and a MOS tube Q1. The gate of the MOS tube Q1 is connected to the control signal output end of the LCD screen of the display control unit, the source of the MOS tube Q1 is grounded, the drain of the MOS tube Q1 is connected to the LCD screen through the resistor R3, and the resistor R4 is also connected between the gate of the MOS tube Q1 and the source of the MOS tube Q1.

[0038] In addition to the LCD backlight control circuit, the display control unit can also directly control the display content on the LCD screen by adjusting the values ​​of its output pins LCD_MOSI, LCD_SCK, LCD_SAO, LCD_RESET and LCD_CS1. Specifically, the output pin LCD_MOSI is connected to the SI pin of the LCD screen through the connector J1, the output pin LCD_SCK is connected to the SCK pin of the LCD screen through the connector J1, the output pin LCD_SAO is connected to the AO pin of the LCD screen through the connector J1, the output pin LCD_RESET is connected to the RST pin of the LCD screen through the connector J1, and the output pin LCD_CS1 is connected to the CS pin of the LCD screen through the connector J1.

[0039] And a corresponding resistor is arranged between each output pin and a pin of the LCD screen, specifically a resistor R31, a resistor R32, a resistor R33, a resistor R34 and a resistor R35.

[0040] And the model of the connector J1 in this embodiment is FPC-DB-12P.

[0041] In order to realize the normal use of the LCD screen, a corresponding basic circuit is also provided. Specifically, the GND pin of the LCD screen is grounded, the VG pin is grounded through a capacitor C9, the XVO pin is connected to the VO pin through a capacitor C10, the VSS pin is grounded, the VDD pin is grounded through a capacitor C11, and the VDD pin is also connected to the first voltage output terminal of the battery. In addition, the RST pin is also grounded through a capacitor C12.

[0042] Specifically, the complete control circuit of the LCD screen in this embodiment is as follows: Figure 3 shown, and Figure 3 LCD1 refers to the LCD screen.

[0043] A USB charging control circuit is also provided between the USB charging port and the control signal output terminal of the USB charging port of the display control unit, such as Figure 4 As shown, the USB charging control circuit includes a transistor Q2, a MOS tube Q3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C3, a capacitor C4 and a capacitor C5. The base of the transistor Q2 is connected to the control signal output end of the USB charging port of the display control unit through the resistor R5, the emitter of the transistor Q2 is grounded, and a resistor R6 is further connected between the base and the emitter of the transistor Q2. The collector of the transistor Q2 is connected to the gate of the MOS tube Q3 through the resistor R7, the source of the MOS tube is connected to the second voltage output end of the battery, and a resistor R8 is further connected between the source and the gate of the MOS tube Q3. The source of the MOS tube Q3 is also grounded through the capacitor C3, and the two ends of the capacitor C3 are also connected in parallel with the capacitor C4. The drain of the MOS tube Q3 is connected to the USB charging port to output the charging voltage, and the drain of the MOS tube Q3 is also grounded through the capacitor C5.

[0044] Through the USB charging port, users can power mobile phones and other products.

[0045] A lawn mower lamp control circuit is also provided between the lawn mower lamp and the control signal output end of the lawn mower lamp of the display control unit. The lawn mower lamp control circuit includes a connector JP2 and a switch control subcircuit. The positive pole of the lawn mower lamp is connected to one of the pins of the connector JP2, the negative pole of the lawn mower lamp is connected to the output end of the switch control subcircuit, and the input end of the switch control subcircuit is connected to the control signal output end of the lawn mower lamp of the display control unit.

[0046] The lawn mower has multiple lighting lamps, and the lighting lamp can be selected according to the needs, and the corresponding output signal is output through the display control unit, so that the corresponding light is lit through the corresponding switch control subcircuit.

[0047] The switch control subcircuit includes a switch element, a voltage-stabilizing capacitor, a protection element and a voltage-dividing resistor. The control end of the switch element is the input end of the switch control subcircuit. The control end of the switch element is connected to the control signal output end of the lawn mower lamp of the display control unit. One end of the switch element is grounded, and the other end of the switch element is connected to the negative electrode of the lawn mower lamp through the protection element. A voltage-dividing resistor is also connected between the control end of the switch element and one end of the switch element. The negative electrode of the lawn mower lamp is also grounded through the voltage-stabilizing capacitor.

[0048] The lawn mower lamp comprises a headlamp, a width lamp, a reverse lamp and a rear tail lamp, and each of the headlamp, the width lamp, the reverse lamp and the rear tail lamp is correspondingly provided with a switch control subcircuit.

[0049] Specifically, the switch control subcircuit includes a headlight switch control subcircuit, a width indicator light switch control subcircuit, a reverse light switch control subcircuit and a tail light switch control subcircuit.

[0050] In order to realize the control of the lawn mower light by the display control unit, the connector JP2 is also connected to other light control pins of the display control unit.

[0051] Specifically, the complete control circuit of the lawn mower light is as follows Figure 5 As shown. Among them, the headlight switch control subcircuit includes a switch element MOS tube Q4, a voltage stabilizing capacitor C13, a protection element F1 and a voltage dividing resistor R10, the width indicator light switch control subcircuit includes a switch element MOS tube Q5, a voltage stabilizing capacitor C14, a protection element F2 and a voltage dividing resistor R11, the reverse light switch control subcircuit includes a switch element MOS tube Q6, a voltage stabilizing capacitor C15, a protection element F3 and a voltage dividing resistor R12, and the rear tail light switch control subcircuit includes a switch element MOS tube Q7, a voltage stabilizing capacitor C16, a protection element F4 and a voltage dividing resistor R13.

[0052] The connector JP2 specifically includes 18 pins, of which pins 1, 3, 5, 7, 9, 11 and 13 are connected to the positive poles of each lawn mower lamp, and pin 2 is connected to the negative pole of the rear tail lamp, and the negative pole of the rear tail lamp is connected to the corresponding rear tail lamp switch control subcircuit. Pins 4 and 6 are connected to the negative pole of the reversing lamp, and the negative pole of the reversing lamp is connected to the corresponding reversing lamp switch control subcircuit. Pins 8 and 10 are connected to the negative pole of the width lamp, and the negative pole of the width lamp is connected to the corresponding width lamp switch control subcircuit. Pins 12 and 14 are connected to the negative pole of the headlamp, and the negative pole of the headlamp is connected to the corresponding headlamp switch control subcircuit. Pins 15 and 16 are respectively the LED signal transmitting end LED_TX and the LED signal receiving end LED_RX, wherein the LED signal transmitting end LED_TX is connected to the TX_CTR signal output end of the display control unit through the corresponding basic circuit, and the LED signal receiving end LED_RX is connected to the corresponding basic circuit.

[0053] The basic circuit should be connected to the RX_CTR signal output terminal of the display control unit.

[0054] Specifically, the basic circuit of the LED signal transmitting end LED_TX includes a resistor R14, a resistor R15, a resistor R16, a transistor Q8, a capacitor C17 and a capacitor C18.

[0055] The basic circuit of the LED signal transmitting end LED_RX includes a resistor R17, a resistor R18, a resistor R19, a transistor Q9, a capacitor C19 and a capacitor C20.

[0056] Secondly, pin 17 of connector JP2 is also connected to the LF_KEY signal output terminal of the display control unit, and a resistor R20 is also provided between pin 17 and the LF_KEY signal output terminal of the display control unit. Pin 17 is also connected to the first voltage output terminal of the battery through resistor R21, and pin 17 is also connected to one end of capacitor C21 through resistor R21, and the other end of capacitor C21 is grounded. Pin 18 of connector JP2 is grounded. The LF_KEY pin end is also grounded through capacitor C22.

[0057] The output voltage of the first voltage output terminal of the battery is 3.3V, the output voltage of the second voltage output terminal of the battery is 12V, and the output voltage of the third voltage output terminal of the battery is 5V.

[0058] The display control unit in this embodiment specifically adopts a GD32F303VCT6 MCU chip. Figure 6 As shown, it is a pin connection diagram of the display control unit under a feasible embodiment of the present application. It can be understood that the connection relationship can also be replaced according to the needs. Figure 6In order to ensure the normal operation of the chip corresponding to the display control unit, resistors R22, R23, R24, R25, R26, R27, R28, R29 and R30 are further provided.

[0059] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A dual switch control module for a riding lawn mower, arranged on the main body of the lawn mower and powered by a battery, characterized in that: The utility model comprises a first function switch, a second function switch, a display control unit, a driving safety control unit and a CAN bus communication unit, wherein one end of the first function switch and the second function switch are connected to a battery at the same time, the other end of the first function switch is connected to an input end of the display control unit, the other end of the second function switch is connected to an input end of the driving safety control unit, an output end of the driving safety control unit is connected to a motor for controlling the walking and operation of the blade of the lawn mower, an output end of the display control unit is connected to an auxiliary function component of the lawn mower, the CAN bus communication unit is connected between the display control unit and the driving safety control unit, and the CAN bus communication unit establishes a communication connection between the display control unit and the driving safety control unit according to the switch states of the first function switch and the second function switch.

2. A dual switch control module for a riding lawn mower according to claim 1, characterized in that: The CAN bus communication unit includes a CAN transceiver chip, a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a diode D1, a diode D2, a diode D3 and a connector JP1. The display control unit is connected to a signal receiving pin of the CAN transceiver chip through a receiving end of the CAN bus, and the display control unit is also connected to a signal sending pin of the CAN transceiver chip through a sending end of the CAN bus. The signal sending pin of the CAN transceiver chip is also connected to a first voltage output end of a battery through a resistor R1. A high-order data output pin of the CAN transceiver chip is connected to one of the pins of the connector JP1, and a low-order data output pin of the CAN transceiver chip is connected to another pin of the connector JP1. A resistor R2 is also connected between the high-order data output pin and the low-order data output pin. A diode D1 is also connected in parallel at both ends of the resistor R2. The high-order data output pin is grounded through the capacitor C1, and the high-order data output pin is also grounded through the diode D2. The low-order data output pin is grounded through the capacitor C2, and the low-order data output pin is also grounded through the diode D3.

3. A dual switch control module for a riding lawn mower according to claim 2, characterized in that: The diode D1 , the diode D2 and the diode D3 are all bidirectional TVS diodes.

4. A dual switch control module for a riding lawn mower according to claim 1, characterized in that: A driving unit is also arranged between the output end of the driving safety control unit and the motor for controlling the movement of the lawn mower and the operation of the cutter disc. The driving unit includes a driving circuit and a self-test circuit. Both the self-test circuit and the driving circuit are connected to the driving safety control unit. The self-test circuit is also connected to the driving circuit. The driving circuit is also connected to the motor for controlling the movement of the lawn mower and the operation of the cutter disc.

5. A dual switch control module for a riding lawn mower according to claim 1, characterized in that: The auxiliary function component includes an LCD screen, a USB charging port and a lawn mower light. The LCD screen is connected to the control signal output end of the LCD screen of the display control unit, the USB charging port is connected to the control signal output end of the USB charging port of the display control unit, and the lawn mower light is connected to the control signal output end of the lawn mower light of the display control unit.

6. A dual switch control module for a riding lawn mower according to claim 5, characterized in that: An LCD screen backlight control circuit is also provided between the LCD screen and the control signal output end of the LCD screen of the display control unit. The LCD screen backlight control circuit includes a resistor R3, a resistor R4 and a MOS tube Q1. The gate of the MOS tube Q1 is connected to the control signal output end of the LCD screen of the display control unit, the source of the MOS tube Q1 is grounded, the drain of the MOS tube Q1 is connected to the LCD screen through the resistor R3, and the resistor R4 is also connected between the gate of the MOS tube Q1 and the source of the MOS tube Q1.

7. A dual switch control module for a riding lawn mower according to claim 5, characterized in that: A USB charging control circuit is also provided between the USB charging port and the control signal output end of the USB charging port of the display control unit. The USB charging control circuit includes a transistor Q2, a MOS transistor Q3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C3, a capacitor C4 and a capacitor C5. The base of the transistor Q2 is connected to the control signal output end of the USB charging port of the display control unit through the resistor R5, the emitter of the transistor Q2 is grounded, a resistor R6 is further connected between the base and the emitter of the transistor Q2, the collector of the transistor Q2 is connected to the gate of the MOS transistor Q3 through the resistor R7, the source of the MOS transistor is connected to the second voltage output end of the battery, a resistor R8 is further connected between the source and the gate of the MOS transistor Q3, the source of the MOS transistor Q3 is further grounded through the capacitor C3, and the two ends of the capacitor C3 are further connected in parallel with a capacitor C4, the drain of the MOS transistor Q3 is connected to the USB charging port to output a charging voltage, and the drain of the MOS transistor Q3 is further grounded through the capacitor C5.

8. A dual switch control module for a riding lawn mower according to claim 5, characterized in that: A lawn mower lamp control circuit is also provided between the lawn mower lamp and the control signal output end of the lawn mower lamp of the display control unit. The lawn mower lamp control circuit includes a connector JP2 and a switch control subcircuit. The positive pole of the lawn mower lamp is connected to one of the pins of the connector JP2, the negative pole of the lawn mower lamp is connected to the output end of the switch control subcircuit, and the input end of the switch control subcircuit is connected to the control signal output end of the lawn mower lamp of the display control unit.

9. A dual switch control module for a riding lawn mower according to claim 8, characterized in that: The switch control subcircuit includes a switch element, a voltage-stabilizing capacitor, a protection element and a voltage-dividing resistor. The control end of the switch element is the input end of the switch control subcircuit. The control end of the switch element is connected to the control signal output end of the lawn mower lamp of the display control unit. One end of the switch element is grounded, and the other end of the switch element is connected to the negative electrode of the lawn mower lamp through the protection element. A voltage-dividing resistor is also connected between the control end of the switch element and one end of the switch element. The negative electrode of the lawn mower lamp is also grounded through the voltage-stabilizing capacitor.

10. A dual switch control module for a riding lawn mower according to claim 9, characterized in that: The lawn mower lamp comprises a headlamp, a width lamp, a reverse lamp and a rear tail lamp, and each of the headlamp, the width lamp, the reverse lamp and the rear tail lamp is correspondingly provided with a switch control subcircuit.

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