Truck-mounted crane control device based on electromagnetic clutch motor

Abstract

The utility model discloses a truck-mounted crane control device based on an electromagnetic clutch motor. The truck-mounted crane control device comprises a motor system, a remote control transmitter and a remote control receiver, the motor system is connected with an external hydraulic operating handle and controls the hydraulic operating handle; the remote control receiver is connected with the motor system to control the motor system to start and stop; and the remote control receiver is in signal connection with the remote control transmitter, receives a transmitting signal of the remote control transmitter, and controls the motor system so as to control the hydraulic operating handle. The motor is controlled in an electromagnetic clutch mode, stable and reliable motor driving can be achieved, fault monitoring and protection are carried out, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of truck crane controllers, in particular to a truck crane control device based on an electromagnetic clutch motor. Background Art

[0002] In the prior art, there are two types of remote control operations for truck-mounted crane engineering equipment: current proportional valves and motor push rods. Current proportional valves are relatively expensive, and require hydraulic oil circuit and electrical modifications to the vehicle body at the same time; the motor push rod does not have a decoupling mechanism for the hydraulic operating handle. When the motor mechanism fails, the hydraulic handle cannot be reset, posing a major safety hazard. Summary of the invention

[0003] According to an embodiment of the utility model, a control device for a truck crane based on an electromagnetic clutch motor is provided, comprising: a motor system, a remote control transmitter and a remote control receiver;

[0004] The motor system is connected to an external hydraulic operating handle to control the hydraulic operating handle;

[0005] The remote control receiver is connected to the motor system to control the start and stop of the motor system;

[0006] The remote control receiver is connected to the remote control transmitter signal, receives the transmission signal of the remote control transmitter, controls the motor system, and controls the hydraulic operating handle.

[0007] Furthermore, the motor system comprises: a reduction gearbox, a motor, a rotating shaft and a swing arm;

[0008] A reducer, an electromagnetic clutch, a sensor and a transmission mechanism are arranged inside the reduction box. The reducer is connected to the output end of the motor, one end of the electromagnetic clutch is connected to the output end of the reducer, and the other end is connected to the transmission mechanism;

[0009] The rotating shaft is rotatably arranged on the reduction box body, and one end of the rotating shaft is coupled with the transmission mechanism;

[0010] The sensor is arranged adjacent to the rotating shaft to obtain the angular position of the rotating shaft in real time;

[0011] One end of the swing arm is connected to the other end of the rotating shaft, and the other end of the swing arm is connected to the hydraulic operating handle;

[0012] The remote control receiver is connected to the motor, the sensor and the electromagnetic clutch to control the motor and the electromagnetic clutch and obtain the angular position of the rotating shaft obtained by the sensor.

[0013] Furthermore, the remote control receiver includes: a circuit board, a single chip microcomputer, a power module, a motor drive module, and a wireless transceiver module;

[0014] The single chip microcomputer, power module, motor drive module and wireless transceiver module are all arranged on the circuit board;

[0015] The wireless transceiver module receives the transmission signal of the remote control transmitter;

[0016] The motor drive module is connected to the motor to control the start and stop of the motor;

[0017] The power module is connected to the single-chip microcomputer, the motor drive module and the wireless transceiver module to provide a stable voltage;

[0018] The single chip microcomputer is connected to the motor drive module and the wireless transceiver module for collecting and processing the input and output of signals.

[0019] Furthermore, it also includes: a functional module; the functional module is connected to the power module and the single-chip microcomputer, and is connected to the vehicle-mounted equipment of the vehicle crane, and is used to control the vehicle-mounted equipment.

[0020] Furthermore, it also includes: a wiring terminal, the wiring terminal is connected to the single-chip microcomputer and an external indicator light, and the indicator light indicates the working state of the remote control receiver.

[0021] Further, the power module includes: a power supply terminal and a step-down circuit;

[0022] The power supply terminal is arranged on the circuit board, and the power supply terminal is connected to an external power source;

[0023] The step-down circuit is connected to the power supply terminal, the wireless transceiver module, the motor drive module and the single-chip microcomputer, and is used for stepping down and stabilizing the power supply to provide power.

[0024] Furthermore, the motor drive module includes: a circuit board, a motor drive circuit, a sensor sampling circuit and an electromagnetic clutch control circuit;

[0025] The circuit board is plugged into the circuit board and connected to the power module and the single chip microcomputer;

[0026] The motor drive circuit, the sensor sampling circuit and the electromagnetic clutch control circuit are all arranged on the circuit board;

[0027] The motor driving circuit drives and controls the rotation of the motor;

[0028] The sensor sampling circuit is connected to the sampling port of the sensor and the single chip microcomputer for signal conversion;

[0029] The electromagnetic clutch control circuit is connected to the electromagnetic clutch to control the on and off of the electromagnetic clutch.

[0030] Further, the motor drive circuit includes: an H-bridge circuit, a pair of control chips, a bidirectional diode and a motor sampling resistor;

[0031] The H-bridge circuit and a pair of control chips are connected to the power module, and the two output ports of the H-bridge circuit are respectively connected to the two ends of the motor to drive the motor to rotate;

[0032] A pair of control chips are respectively connected to the two signal input ports of the H-bridge circuit to control the direction and speed of the motor;

[0033] A bidirectional diode is connected in parallel to the motor to absorb the peak voltage of the motor;

[0034] The motor sampling resistor is connected in series with the H-bridge circuit to collect the running current of the motor in real time.

[0035] Furthermore, the sensor sampling circuit includes: a voltage divider resistor, a signal processing chip, a voltage regulator diode and a current limiting resistor;

[0036] The two ends of the voltage-dividing resistor are respectively connected to the input end of the sensor and the input end of the signal processing chip;

[0037] The output end of the signal processing chip is connected to the sampling port of the single chip microcomputer to process and output the output signal of the sensor;

[0038] The voltage-stabilizing diode and the current-limiting resistor are connected in series between the signal processing chip and the sampling port of the single-chip microcomputer to protect the sampling port.

[0039] Furthermore, the electromagnetic clutch control circuit includes: a MOS tube and a relay;

[0040] The gate of the MOS tube is connected to the single chip microcomputer, the source of the MOS tube is connected to the input end of the relay, the drain of the MOS tube is grounded, and the MOS tube controls the switch of the relay;

[0041] The power supply end of the relay is connected to the power module, and the output end of the relay is connected to the electromagnetic clutch to control the on and off of the electromagnetic clutch.

[0042] According to the truck crane control device based on the electromagnetic clutch motor of the embodiment of the utility model, the motor is controlled by electromagnetic clutch, which can realize stable and reliable motor drive, perform fault monitoring and protection, and facilitate maintenance.

[0043] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of a motor control system according to the utility model;

[0045] Figure 2 is a structural diagram of a remote control receiver according to the utility model;

[0046] Figure 3is a circuit diagram of a power module according to the utility model;

[0047] Figure 4 is a circuit diagram of a step-down circuit of a power module according to the utility model;

[0048] Figure 5 is a schematic diagram of a single chip microcomputer according to the utility model;

[0049] Figure 6 A sampling circuit diagram of a single chip microcomputer according to the utility model;

[0050] Figure 7 is a circuit diagram of a wireless transceiver module according to the utility model;

[0051] Figure 8 is a first circuit diagram of a functional module according to the utility model;

[0052] Fig. 9 is a second circuit diagram of a functional module according to the utility model;

[0053] Fig.10 is a circuit diagram of an indicator light according to the utility model;

[0054] Fig.11 A circuit diagram of a circuit board connector of a motor drive module according to the utility model;

[0055] Fig.12 is a circuit diagram of an isolation chip of a motor drive module according to the utility model;

[0056] Fig.13 A circuit diagram of a motor connector of a motor drive module according to the utility model;

[0057] Fig.14 A circuit diagram of an electromagnetic clutch control circuit of a motor drive module according to the utility model;

[0058] Fig.15 A circuit diagram of a sensor sampling circuit of a motor drive module according to the utility model;

[0059] Fig.16 It is a circuit diagram of a motor driving circuit of a motor driving module according to the utility model. DETAILED DESCRIPTION

[0060] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0061] First, combine Figures 1 to 16 A truck crane control device based on an electromagnetic clutch motor according to an embodiment of the utility model is described, which is used to control a truck crane and has a wide range of application scenarios.

[0062] like Figures 1 to 16 As shown, the control device of the truck crane based on the electromagnetic clutch motor of the embodiment of the utility model comprises: a motor system, a remote control transmitter and a remote control receiver.

[0063] Specifically, Figure 1~2 As shown, in this embodiment, the motor system is connected to an external hydraulic operating handle to control the hydraulic operating handle; the remote control receiver is connected to the motor system to control the start and stop of the motor system; the remote control receiver is connected to the remote control transmitter signal to receive the transmission signal of the remote control transmitter and control the motor system to control the hydraulic operating handle. In this embodiment, the motor system includes: a reduction gear box 92, a motor 91, a rotating shaft 93 and a swing arm 94; the motor 91 adopts a DC brush motor 91 with a rated voltage of 24V, and the reduction gear box 92 is provided with a reducer, an electromagnetic clutch, a sensor and a transmission mechanism. The transmission mechanism is an existing one, and the sensor is a Hall position sensor. The reducer is connected to the output end of the motor 91, one end of the electromagnetic clutch is connected to the output end of the reducer, and the other end is connected to the transmission mechanism; the rotating shaft 93 is rotatably arranged on the reduction gear box 92, and one end of the rotating shaft 93 is coupled to the transmission mechanism; the sensor is connected to the rotating shaft 93. The shafts 93 are arranged adjacent to each other, and the angle position of the rotating shaft 93 is obtained in real time, so that the position of the swing arm 94 can be accurately monitored and controlled. The operator can more accurately control the position and posture of the truck crane, thereby improving the accuracy of the operation; one end of the swing arm 94 is connected to the other end of the rotating shaft 93, and the other end of the swing arm 94 is connected to the hydraulic operating handle, so that the swing of the swing arm 94 is synchronized to the hydraulic operating handle, thereby realizing the control of the handle; the remote control receiver is connected to the motor 91, the sensor and the electromagnetic clutch, controls the motor 91 and the electromagnetic clutch, and obtains the angle position of the rotating shaft 93 obtained by the sensor. By controlling the motor 91 through the electromagnetic clutch, stable and reliable driving of the motor 91 can be achieved.

[0064] Further, if Figures 2 to 16 As shown, in this embodiment, the remote control receiver includes: a circuit board 8, a single-chip microcomputer 2U1, a power module 1, a motor drive module 4, and a wireless transceiver module 3; the single-chip microcomputer 2U1, the power module 1, the motor drive module 4 and the wireless transceiver module 3 are all arranged on the circuit board 8, and the circuit board 8 carries the circuit structure of the entire remote control receiver; the wireless transceiver module 3 receives the transmission signal of the remote control transmitter, and the wireless transceiver module 3 is an existing one, which is connected to the single-chip microcomputer 2U1 in the form of a plug-in connector for easy maintenance and replacement; the motor drive module 4 is connected to the motor 91 to control the start and stop of the motor 91; the power module 1 is connected to the single-chip microcomputer 2U1, the motor drive module 4 and the wireless transceiver module 3 to provide a stable voltage; the single-chip microcomputer 2U1 is connected to the motor drive module 4 and the wireless transceiver module 3 to collect and process the input and output of signals.

[0065] Further, if Figure 2 As shown, in this embodiment, it also includes: a functional module 5; the functional module 5 is connected to the power module 1 and the single-chip computer 2U1, and is connected to the vehicle-mounted equipment of the truck crane, and is used to control the vehicle-mounted equipment. The functional module 5 includes the control functions required for the truck crane equipment such as the horn, lighting, and throttle. Its circuit diagram is shown in Figures 8~9, and PWM is used to control the dual-channel throttle output. The output range is about 0~6V adjustable, and it can be compatible with different truck crane models; the horn and lighting functions are driven by a normally open relay controlled by two MOS tube switches.

[0066] Further, if Figure 2 , 10 As shown, in this embodiment, it also includes: a wiring terminal 7, which is connected to the single-chip computer 2U1 and an external indicator light, and the indicator light indicates the working status of the remote control receiver. The indicator light is powered by 5V and driven by the ULN2003ADR chip.

[0067] like Figures 5 and 6 As shown, the USART3, RFSLP and RFRST pins of the microcontroller 2U1 are used for communication and control of the wireless transceiver module 3; Accel1 is a PWM output pin for controlling the throttle output; K1 and K2 are used to control the on and off of the horn and lighting relay; LEDS, LEDO, LEDR and LEDB are used to control the external indicator light; the relevant function pins of the motor drive module 4 are all directly connected to the microcontroller 2U1 through the gold finger connector: PWML1 / PWMR1 - PWML5 / PWMR5; 5 groups × 2, a total of 10 PWM output pins, respectively used to control 5 DC motor drive circuits; PWM_EN1 - PWM_EN5, used for enable / enable control of the motor drive circuit; LOCK1 - LOCK5, used for 5 electromagnetic clutch switch control; Position1 -Position5, are 5 ADC sampling channels, used for real-time sampling of the output voltage of the motor 91 Hall sensor; Sense1 -Sense5, which is a 5-channel ADC sampling channel, is used for motor 91 drive current sampling and monitoring; 12-channel ADC sampling ports all have resistance-capacitance filtering design to filter peak sampling signals and improve the reliability of signal sampling.

[0068] Further, if Figures 2~4As shown, the power module 1 includes: a power supply terminal 6 and a step-down circuit; the power supply terminal 6 is arranged on the circuit board 8, the power supply terminal 6 is connected to the external power supply, and the power supply terminal also integrates the wiring terminal of the functional module 5; the step-down circuit is connected to the power supply terminal 6, the wireless transceiver module 3, the motor drive module 4 and the single-chip computer 2U1, and is used to step down and stabilize the power supply. The 24V DC input is stepped down into two 12V power supplies 12V-1 and 12V-2 through two sets of power conversion circuits; 12V-2 provides the required 12V power supply for the horn, lighting and throttle function circuits; 12V-1 provides the required 12V power supply for the circuit of the motor drive module 4 through the gold finger connector; at the same time, through three sets of power conversion circuits, it is stepped down into one 5V power supply 5V-1 and 5V-2, and one 3.3V power supply; 5V-1 is used to power the wireless transceiver module 3 and the external indicator light, and at the same time, it provides the required 5V power supply to the circuit of the motor drive module 4 through the gold finger connector.

[0069] Further, if Figure 2 , 11 As shown in Figure 16, in this embodiment, the motor drive module 4 includes: a circuit board, a motor drive circuit, a sensor sampling circuit and an electromagnetic clutch control circuit; the circuit board is plugged into the circuit board 8 and connected to the power module 1 and the single-chip computer 2U1; the motor drive circuit, the sensor sampling circuit and the electromagnetic clutch control circuit are all arranged on the circuit board; the motor drive circuit drives and controls the rotation of the motor 91; the sensor sampling circuit, the sensor sampling circuit is connected to the sensor and the sampling port of the single-chip computer 2U1 for signal conversion; the electromagnetic clutch control circuit is connected to the electromagnetic clutch to control the on and off of the electromagnetic clutch. The drive of the DC brushed motor 91, as well as the attached electromagnetic clutch mechanism and sensor position detection mechanism, are integrated into independent small modules, and the current monitoring circuit is integrated for safety protection function; the modular design is adapted to different types of truck cranes, and the number of modules required can be freely increased or decreased, and it is convenient for later maintenance and replacement. Compared with the single-board design, it can reduce the volume of the control device, reduce the material inventory cost, and facilitate installation and maintenance. Fig.11 As shown, the connector for connecting the circuit board 8 adopts a gold finger interface to avoid high current tolerance connectors and reduce costs. The 24V and GND networks use multiple pins for common power supply. This method can use connectors with lower current tolerance to achieve high current circuit routing and reduce costs. At the same time, more pins can increase the contact surface friction between the circuit board 8 connector and the module gold finger interface and improve the stability of the connection. 1C1 is a large-capacity electrolytic capacitor used to absorb the peak voltage during the operation of the motor 91 to protect the drive circuit. Fig.12As shown, U1 is an IO isolation chip, which isolates each functional pin of the motor drive module 4 from the corresponding single-chip pin to prevent the motor drive module 4 from damaging the single-chip microcomputer 2U1 due to failure or other reasons. Fig.13 As shown, it is a connector for connecting the motor 91, and its various interfaces are adapted to the motor 91 system. Among them, 6C1 and 6C2 are filter capacitors, which filter the possible spike voltage in the output voltage of the Hall sensor to improve the sampling accuracy and stability.

[0070] Further, if Fig.16 As shown, the motor drive circuit includes: an H-bridge circuit, a pair of control chips UL / UR, a bidirectional diode 4D1 and a motor sampling resistor RS; the H-bridge circuit and the pair of control chips UL / UR are connected to the power module 1, and the two output ports of the H-bridge circuit are respectively connected to the two ends of the motor 91 to drive the motor 91 to rotate; the pair of control chips UL / UR are respectively connected to the two signal input ports of the H-bridge circuit to control the direction and speed of the motor 91; the bidirectional diode 4D1 is connected in parallel to the motor 91 to absorb the peak voltage of the motor 91; the motor sampling resistor RS is connected in series with the H-bridge circuit to collect the running current of the motor 91 in real time. The H-bridge circuit is used to drive the DC brushed motor 91, and the speed and direction of the motor 91 can be adjusted to realize the swing arm 94 at any speed and direction. The control chip UL / UR is used to drive the H-bridge circuit, which ensures the reliability of the drive circuit and reduces the complexity of the software algorithm. When any abnormality is detected in the drive circuit, the H-bridge drive control chip is disabled by controlling the PWM_EN_C pin, and the operation safety of the controller and the equipment is jointly guaranteed with the electromagnetic clutch control. 4D1 is a bidirectional TVS diode, which absorbs the peak voltage during the operation of the motor 91 together with the electrolytic capacitor 1C1, protects the safety of the motor drive circuit, and improves the reliability of the circuit operation. 4R2 is a 0Ω resistor, which isolates the large current motor drive circuit from the reference points GND and AGND of the small current signal circuit part to reduce the interference between the circuits. RS is a 5mΩ / 3W high-precision sampling resistor connected in series to the motor drive circuit. The single-chip microcomputer 2U1 collects the running current of the motor 91 in real time through this resistor. When the current abnormality is detected, the software algorithm is used to run the relevant protection action to ensure the operation safety of the motor 91 and the circuit.

[0071] Further, if Fig.15As shown, in this embodiment, the sensor sampling circuit includes: a voltage-dividing resistor 3R1, a signal processing chip U2, a voltage-stabilizing diode 3D1 and a current-limiting resistor 3R5; the model of the signal processing chip U2 is LM358, and the two ends of the voltage-dividing resistor 3R1 are respectively connected to the input ends of the sensor and the signal processing chip U2; the output end of the signal processing chip U2 is connected to the sampling port of the single-chip microcomputer 2U1 to process and output the output signal of the sensor; the voltage-stabilizing diode 3D1 and the current-limiting resistor 3R5 are connected in series between the sampling port of the signal processing chip U2 and the single-chip microcomputer 2U1 to protect the sampling port. The voltage output by the Hall position sensor calibrates the real-time absolute angle position of the rotating shaft 93 and the swing arm 94. After the single-chip microcomputer 2U1 detects the sampling voltage, it is converted into a real-time position within the operating range of the swing arm 94 through a software algorithm, and compared with the remote control handle operation data, thereby controlling the operation of the motor 91 to achieve synchronization of the swing arm 94 and the remote control handle operation action, and run to the target position.

[0072] Further, if Fig.14 As shown, in this embodiment, the electromagnetic clutch control circuit includes: a MOS tube 5Q1 and a relay K_LOCK, and the relay K_LOCK is a normally open relay K_LOCK; the gate of the MOS tube 5Q1 is connected to the single-chip computer 2U1, the source of the MOS tube 5Q1 is connected to the input end of the relay K_LOCK, the drain of the MOS tube 5Q1 is grounded, and the MOS tube 5Q1 controls the switch of the relay K_LOCK; the power supply end of the relay K_LOCK is connected to the power module 1, and the output end of the relay K_LOCK is connected to the electromagnetic clutch to control the on and off of the electromagnetic clutch. The control logic is: when it is detected that the corresponding handle of the remote control is operated, the control relay K_LOCK is closed, so that the transmission mechanism of the motor 91 is coupled with the rotating shaft 93, driving the swing arm 94 to operate, thereby controlling the hydraulic operating handle of the truck crane; when it is detected that the corresponding handle of the remote control returns to the middle position, the control relay K_LOCK is disconnected, so that the transmission mechanism of the motor 91 is decoupled from the rotating shaft 93. At this time, the swing arm 94 can return to the middle position driven by the hydraulic operating handle of the truck crane, and the corresponding action of the equipment is stopped; when the controller is in an emergency stop state, the wireless communication is interrupted, and an abnormal driving current is detected, the control relay K_LOCK is also disconnected, and the rotating shaft 93 is decoupled to achieve the role of safety protection.

[0073] Above, refer to Figures 1 to 16 The invention describes a vehicle-mounted crane control device based on an electromagnetic clutch motor according to an embodiment of the utility model. The electromagnetic clutch is used to control the motor, thereby achieving stable and reliable motor drive, performing fault monitoring and protection, and facilitating maintenance.

[0074] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0075] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A truck crane control device based on an electromagnetic clutch motor, characterized in that: Includes: motor system, remote control transmitter and remote control receiver; The motor system is connected to an external hydraulic operating handle to control the hydraulic operating handle; The remote control receiver is connected to the motor system to control the start and stop of the motor system; The remote control receiver is connected to the remote control transmitter signal, receives the transmission signal of the remote control transmitter, and controls the motor system to control the hydraulic operating handle.

2. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 1, characterized in that: The motor system comprises: a reduction gearbox, a motor, a rotating shaft and a swing arm; A reducer, an electromagnetic clutch, a sensor and a transmission mechanism are arranged inside the reduction box, the reducer is connected to the output end of the motor, one end of the electromagnetic clutch is connected to the output end of the reducer, and the other end is connected to the transmission mechanism; The rotating shaft is rotatably arranged on the reduction box body, and one end of the rotating shaft is coupled to the transmission mechanism; The sensor is disposed adjacent to the rotating shaft to obtain the angular position of the rotating shaft in real time; One end of the swing arm is connected to the other end of the rotating shaft, and the other end of the swing arm is connected to the hydraulic operating handle; The remote control receiver is connected to the motor, the sensor and the electromagnetic clutch, controls the motor and the electromagnetic clutch, and obtains the angular position of the rotating shaft obtained by the sensor.

3. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 2, characterized in that: The remote control receiver comprises: a circuit board, a single chip microcomputer, a power module, a motor drive module, and a wireless transceiver module; The single chip microcomputer, the power module, the motor drive module and the wireless transceiver module are all arranged on the circuit board; The wireless transceiver module receives the transmission signal of the remote control transmitter; The motor drive module is connected to the motor to control the start and stop of the motor; The power supply module is connected to the single chip microcomputer, the motor drive module and the wireless transceiver module, and is used to provide a stable voltage; The single chip microcomputer is connected to the motor drive module and the wireless transceiver module, and is used for collecting and processing input and output of signals.

4. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 3, characterized in that: It also includes: a functional module; the functional module is connected to the power module and the single-chip microcomputer, and is connected to the vehicle-mounted equipment of the vehicle-mounted crane, and is used to control the vehicle-mounted equipment.

5. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 3, characterized in that: It also includes: a wiring terminal, the wiring terminal is connected to the single chip computer and an external indicator light, and the indicator light indicates the working state of the remote control receiver.

6. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 3, characterized in that: The power module comprises: a power supply terminal and a step-down circuit; The power supply terminal is arranged on the circuit board, and the power supply terminal is connected to an external power source; The step-down circuit is connected to the power supply terminal, the wireless transceiver module, the motor drive module and the single-chip microcomputer, and is used to step down and stabilize the power supply to provide power.

7. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 3, characterized in that: The motor drive module comprises: a circuit board, a motor drive circuit, a sensor sampling circuit and an electromagnetic clutch control circuit; The circuit board is plugged into the circuit board and connected to the power module and the single chip microcomputer; The motor drive circuit, the sensor sampling circuit and the electromagnetic clutch control circuit are all arranged on the circuit board; The motor driving circuit drives and controls the motor to rotate; The sensor sampling circuit is connected to the sensor and the sampling port of the single chip microcomputer for signal conversion; The electromagnetic clutch control circuit is connected to the electromagnetic clutch to control the on and off of the electromagnetic clutch.

8. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 7, characterized in that: The motor drive circuit comprises: an H-bridge circuit, a pair of control chips, a bidirectional diode and a motor sampling resistor; The H-bridge circuit and the pair of control chips are both connected to the power module, and the two output ports of the H-bridge circuit are respectively connected to the two ends of the motor to drive the motor to rotate; The pair of control chips are respectively connected to the two signal input ports of the H-bridge circuit to control the direction and speed of the motor; The bidirectional diode is connected in parallel to the motor to absorb the peak voltage of the motor; The motor sampling resistor is connected in series with the H-bridge circuit and is used to collect the running current of the motor in real time.

9. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 7, characterized in that: The sensor sampling circuit comprises: a voltage dividing resistor, a signal processing chip, a voltage stabilizing diode and a current limiting resistor; The two ends of the voltage-dividing resistor are respectively connected to the input end of the sensor and the input end of the signal processing chip; The output end of the signal processing chip is connected to the sampling port of the single chip microcomputer to process and output the output signal of the sensor; The voltage-stabilizing diode and the current-limiting resistor are connected in series between the signal processing chip and the sampling port of the single-chip microcomputer to protect the sampling port.

10. The control device for a truck crane based on an electromagnetic clutch motor as claimed in claim 7, characterized in that: The electromagnetic clutch control circuit comprises: a MOS tube and a relay; The gate of the MOS tube is connected to the single chip microcomputer, the source of the MOS tube is connected to the input end of the relay, the drain of the MOS tube is grounded, and the MOS tube controls the switch of the relay; The power supply end of the relay is connected to the power supply module, and the output end of the relay is connected to the electromagnetic clutch to control the on and off of the electromagnetic clutch.

Images