CN221886226U - A DC motor intelligent protection device - Google Patents

Abstract

The utility model belongs to the technical field of motors, and relates to an intelligent protection device of a direct current motor, which comprises: the device comprises a center rod, a bowl pad, a movable spring, a spring seat, a movable contact assembly, a fixed contact assembly, a base, insulating paper, an electromagnetic assembly, an auxiliary assembly, a push rod, a counter-force spring, a movable iron core, a contact seat, a waterproof cover, a PCB (printed circuit board), an upper cover and a connector; the center rod is vertically arranged at the center of the intelligent protection device of the direct current motor and is used for supporting and fixing the intelligent protection device of the direct current motor; the bowl pad is vertically arranged on the central rod and used for fixing the movable contact assembly, the movable spring and the fixed contact assembly to prevent the movable contact assembly, the movable spring and the fixed contact assembly from sliding off; the movable spring is arranged on the central rod and used for connecting the ejector rod and the movable contact assembly, and when the contact is opened or closed; the spring seat is arranged on the movable contact assembly and used for fixing the movable spring. The embodiment solves the problem that a user forgets to turn off and the traditional product is not stopped due to adhesion of a mechanical switch in the using process.

Description

A DC motor intelligent protection device

Technical Field

The utility model relates to the technical field of motors, and more specifically to an intelligent protection device for a DC motor.

Background Art

The DC motor intelligent protection device is a device used to protect the DC motor from overload, short circuit and other faults. The device determines the running state of the motor by measuring the motor's input current, voltage, speed and other parameters, and takes corresponding protection measures when necessary.

In the prior art, electric hydraulic tailgates for trucks on the market may be triggered by mistake due to the operator forgetting to turn off the power, or the traditional contactor may stick, causing the motor to stall and cause overload and fire. These accidents may cause economic losses or personal health damage in serious cases.

Utility Model Content

The technical problem to be solved by the utility model is that in the prior art, the electric hydraulic tailgate of trucks on the market may be accidentally triggered by the operator forgetting to turn off the power, and the traditional contactor may stick, causing the motor to be blocked and cause overload and fire. In view of the above-mentioned defects of the prior art, a DC motor intelligent protection device is provided, including:

Center rod, bowl pad, dynamic spring, spring seat, dynamic contact assembly, static contact assembly, base, insulating paper, electromagnetic assembly, auxiliary assembly, ejector rod, reaction spring, dynamic iron core, contact seat, waterproof cover, PCB board, upper cover, connector;

Wherein, the central rod is vertically arranged at the center of the DC motor intelligent protection device, and is used to support and fix the DC motor intelligent protection device;

The bowl pad is vertically arranged on the center rod, and is used to fix the moving contact assembly, the moving spring and the stationary contact assembly to prevent them from sliding off, and the moving contact assembly and the stationary contact assembly are fixed by the bowl pad;

The dynamic spring is arranged on the central rod, and is used to connect the top rod and the dynamic contact assembly, and provides necessary elasticity when the contact is opened or closed;

The spring seat is arranged on the moving contact assembly and is used to fix the moving spring to ensure its normal operation;

The moving contact assembly is arranged on the contact seat and is used to connect or disconnect the circuit;

The static contact assembly is arranged on the contact seat, cooperates with the moving contact assembly, and is detachably connected to facilitate maintenance and replacement;

The base is fixedly connected to the center rod, provides a mounting base for the device, and is fixedly connected to the motor housing. The base fixes the static contact assembly and the electromagnetic assembly by screws;

The electromagnetic assembly is used to generate a magnetic field, and control the switch state of the contact by attracting and releasing the moving iron core;

The auxiliary component includes a waterproof cover to protect the interior of the device from being affected by the external environment. When the circuit is on and off, the auxiliary component is used to maintain the electromagnetic component;

The ejector rod is connected to the moving spring and the moving contact assembly to transmit the action force;

The reaction spring acts on the top rod to provide a reaction force when the contacts are opened or closed;

The moving iron core is used to be attracted and released by the magnetic field of the electromagnetic assembly to drive the contact seat to move;

The contact seat is arranged on the central rod and cooperates with the moving contact assembly to connect the moving iron core and the contact;

The PCB board is provided with a timing circuit to realize the control and protection functions of the device;

The upper cover is used to fix and protect the interior of the device from being affected by the external environment;

The connector is used to connect to an external circuit.

Preferably, the device further comprises insulating paper, wherein the insulating paper is arranged between the electromagnetic assembly and the base to isolate the electromagnetic assembly from the base and enhance electrical safety.

Preferably, the device further comprises a waterproof cover for preventing moisture from entering the interior of the device, thereby improving its waterproof performance.

Preferably, the moving contact assembly comprises a moving contact, a drive mechanism, an arc extinguishing module, and an auxiliary contact which are electrically connected.

Preferably, the stationary contact assembly comprises a stationary contact, a conductive bar, and a fastener.

Preferably, the electromagnetic assembly comprises: an armature winding, an excitation winding and a commutator.

Preferably, the auxiliary component further comprises: a temperature sensor for monitoring the temperature of the motor to prevent performance degradation or damage caused by overheating.

Preferably, the auxiliary component further comprises: a current sensor for monitoring the input current of the motor. By monitoring the current, the device can determine the load state and operating condition of the motor.

Preferably, the auxiliary component further comprises: a voltage sensor and a Hall element, wherein the voltage sensor is used to monitor the input voltage of the motor, and the Hall element is used to detect the rotation speed and position of the motor.

Preferably, the timing circuit comprises: a microcontroller, a timer, a power management unit, an input device, an output device and a protection relay.

The implementation of the DC motor intelligent protection device of the utility model has the following beneficial effects: the current, voltage and other key parameters of the motor are monitored in real time through the sensor, and these parameters are converted into processable signals; after the microprocessor receives the signal from the sensor, if any abnormality is found, the microprocessor will immediately send a control signal; after the actuator receives the control signal, the actuator immediately cuts off the power supply to prevent the abnormal situation from further developing; with accurate monitoring, fast response and powerful fault memory function, it provides a solid guarantee for the safe operation of the DC motor; by using an electronic switch and a precise timing device, the user can automatically cut off the power half an hour after the end of use, avoiding accidents caused by forgetting to cut off the power and causing false triggering, as well as power consumption problems; through a single timing design, a single working time is set to a custom time such as one minute, and the power supply will be automatically cut off when the custom time such as one minute is exceeded, which solves the problem of non-stopping caused by mechanical switch adhesion during the use of traditional products; a current detection function is added, which can automatically analyze whether the product is in a normal working state or an overload state. If the product is detected to be overloaded, the power supply is quickly cut off to avoid problems such as excessive line current causing heating and fire of the wire.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. The utility model will be further described below in combination with the drawings and embodiments. In the drawings:

FIG1 is a cross-sectional view of the intelligent protection device for a DC motor according to the present invention;

FIG2 is a side view of the intelligent protection device for DC motors of the utility model;

In the figure, 1-center rod, 2-bowl pad, 3-moving spring, 4-spring seat, 5-moving contact assembly, 6-static contact assembly, 7-base, 8-insulating paper, 9-electromagnetic assembly, 10-auxiliary assembly, 11-top rod, 12-reaction spring, 13-moving iron core, 14-contact seat, 15-waterproof cover, 16-PCB board, 17-upper cover, 18-connector.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

Please refer to Figure 1, which is a schematic diagram of the structure of the intelligent protection device for DC motors of the utility model. As shown in Figure 1, in the first embodiment of the utility model, the intelligent protection device for DC motors at least includes: a center rod 1, a bowl pad 2, a moving spring 3, a spring seat 4, a moving contact assembly 5, a static contact assembly 6, a base 7, an insulating paper 8, an electromagnetic assembly 9, an auxiliary assembly 10, a top rod 11, a reaction spring 12, a moving iron core 13, a contact seat 14, a waterproof cover 15, a PCB board 16, an upper cover 17, and a connector 18; wherein the center rod 1 is vertically arranged at the center of the intelligent protection device for DC motors, and is used to support and fix the intelligent protection device for DC motors. ; The bowl pad 2 is vertically arranged on the center rod 1, and is used to fix the moving contact assembly 5, the moving spring 3 and the static contact assembly 6 to prevent them from slipping. The moving contact assembly 5 and the static contact assembly 6 are fixed through the bowl pad 2; the moving spring 3 is arranged on the center rod 1, and is used to connect the top rod 11 and the moving contact assembly 5, and provide the necessary elasticity when the contact is opened or closed; the spring seat 4 is arranged on the moving contact assembly 5, and is used to fix the moving spring 3 to ensure its normal operation; the moving contact assembly 5 is arranged on the contact seat 14, and is used to connect or disconnect the circuit; the static contact assembly 6 is arranged on the contact seat 14, It works with the moving contact assembly 5 and is detachably connected for easy maintenance and replacement; the base 7 is fixedly connected to the center rod 1 to provide a foundation for the installation of the device and is fixedly connected to the motor housing. The base 7 fixes the static contact assembly 6 and the electromagnetic assembly 9 by screws; the electromagnetic assembly 9 is used to generate a magnetic field and control the switching state of the contact by attracting and releasing the moving iron core 13; the auxiliary assembly 10 includes a waterproof cover 15 to protect the inside of the device from the influence of the external environment. When the circuit is on and off, the auxiliary assembly 10 is used to maintain the electromagnetic assembly 9; the top rod 11 is connected to the moving elastic The spring 3 and the moving contact assembly 5 are used to transmit the action force; the reaction spring 12 acts on the top rod 11 to provide a reaction force when the contact is opened or closed; the moving iron core 13 is used to be attracted and released by the magnetic field of the electromagnetic assembly 9 to drive the contact seat 14 to move; the contact seat 14 is arranged on the center rod 1 and cooperates with the moving contact assembly 5 to connect the moving iron core 13 and the contact; the PCB board 16 is provided with a timing circuit to realize the control and protection functions of the device; the upper cover 17 is used to fix and protect the inside of the device from being affected by the external environment; the connector 18 is used to connect the external circuit.

The waterproof cover 15 clamps the static contact assembly 6 and places the electromagnetic assembly 9, so that the interior of the product will not be displaced when the motor is working, protecting the interior of the device from the influence of the external environment, and is used to be installed on the customer's product.

The center rod 1 is the core component of the device, connecting other components. The bowl pad 2, the moving spring 3, the spring seat 4, the moving contact assembly 5, the static contact assembly 6, the base 7, the insulating paper 8, the electromagnetic assembly 9, the auxiliary assembly 10, the top rod 11, the reaction spring 12, the moving iron core 13, the contact seat 14, the waterproof cover 15, the PCB board 16, and the upper cover 17 are connected and fixed through the center rod 1 to form a complete DC motor intelligent protection device. In normal operation, the components work together to achieve comprehensive protection of the DC motor.

The contact seat 14 is arranged on the center rod 1, cooperates with the moving contact assembly 5, and is used to connect the moving iron core 13 and the contact;

The PCB board 16 is provided with a timing circuit to realize the control and protection functions of the device. In specific implementation, the timing circuit includes: a microcontroller, a timer, a power management unit, an input device, an output device and a protection relay.

The microcontroller is responsible for processing and executing instructions. For example, a single working timing function can be set. The current sensor detects that the device is in working state. When it has not reached the overload state, a one-minute countdown begins. Within one minute, the working state changes to the standby state, and the timing ends. If it exceeds one minute, the power will be automatically cut off. In the timing 1-minute circuit, the microcontroller will control the running time of the motor according to its internal timer or external input signal. If the running time of the motor exceeds 1 minute, the microcontroller will trigger the protection mechanism and turn off the motor to prevent overload. For example, the automatic shutdown function can also be set to automatically detect the end of the last work of the device and start timing. For example, if it does not work for 30 minutes (the time is not fixed and can be set according to the actual situation), the power will be automatically cut off.

Timer: This is a component that implements the timing function. In the DC motor intelligent protection device, the timer is usually a precise timing integrated circuit, such as a 555 timer. It works with the microcontroller to control the start and stop of the motor within the set time.

Power Management Unit: Provides a stable power supply to the entire circuit. It ensures that components such as microcontrollers and timers receive appropriate voltage and current when running, thus ensuring the normal operation of the circuit.

Input device: The user starts or stops the motor by inputting a device such as a button or sensor. The input device converts the user's instructions into electrical signals and then passes them to the microcontroller.

Output device: used to indicate the motor's operating status or fault condition. For example, when the motor runs for more than 1 minute, the output device may sound an alarm or display a corresponding fault code.

Protection relay: When the motor is overloaded or short-circuited, the protection relay will automatically cut off the power supply to prevent damage to the equipment. It is connected to the microcontroller, and when the microcontroller detects an overload or short circuit, it triggers the protection relay to cut off the power supply to the motor.

In specific implementation, the device of this embodiment further includes insulating paper 8, which is arranged between the electromagnetic component 9 and the base 7 to isolate the electromagnetic component 9 from the base 7 and enhance electrical safety.

In specific implementation, the device of this embodiment further includes a waterproof cover 15 for preventing moisture from entering the interior of the device and improving its waterproof performance.

The moving contact assembly 5 includes a moving contact, a driving mechanism, an arc extinguishing module, and an auxiliary contact that are electrically connected.

The moving contact is the core part of the moving contact assembly 5, and is usually made of materials such as silver cadmium oxide (AgCdO) or silver zinc oxide (AgZnO). These materials have good electrical conductivity, wear resistance and welding resistance, and can ensure that the contact maintains a stable contact resistance during long-term use.

Shape of moving contact: The shape design of the moving contact has an important influence on its service life and contact resistance. Common moving contact shapes include knife-shaped, U-shaped and circular. Knife-shaped contacts have good pressure resistance and current conduction capabilities and are suitable for high current applications; U-shaped and circular contacts are suitable for low current and high frequency applications.

The driving mechanism is another important component of the moving contact assembly 5, and its main function is to drive the contacts to close or open. Common driving mechanisms include electromagnetic, pneumatic and electric types. The electromagnetic driving mechanism has the advantages of simple structure and rapid action, and is suitable for occasions with high action speed requirements; the pneumatic and electric driving mechanisms are suitable for occasions with low action speed requirements.

Arc extinguishing module: During the contact disconnection process, the arc extinguishing module can effectively suppress the generation of arcs, avoid arc erosion of contacts and damage to the device. The arc extinguishing module can use magnetic blowing arc extinguishing, grid arc extinguishing and other methods.

Auxiliary contacts: The function of auxiliary contacts is to control the on and off of other circuits during the operation of the main contacts. Auxiliary contacts are usually designed in a normally closed or normally open style to meet the control requirements of different circuits.

The moving contact assembly 5 plays a role in controlling the on and off of the circuit and protecting the motor and the device in the DC motor intelligent protection device. In specific implementation, it is necessary to select a suitable moving contact assembly 5 according to the specific requirements and operating environment of the motor to ensure the protection effect and stability of the device.

In a specific implementation, the stationary contact assembly 6 includes a stationary contact, a conductive bar, and a fastener.

The stationary contact is the core part of the stationary contact assembly 6. It is responsible for providing stable and reliable power transmission during the start-up and operation of the motor. The material and structural design of the stationary contact must fully consider the load characteristics of the motor to ensure that good electrical performance can be maintained under various working environments.

The main function of the conductive bar is to guide the current flow, ensure that the current is evenly distributed between the static contacts, reduce energy consumption and heat accumulation. At the same time, the conductive bar can also effectively reduce electromagnetic interference and improve the stability of motor operation.

Insulating materials also play an indispensable role in the static contact assembly 6. In order to ensure the safety of current transmission, insulating materials are used to isolate the static contact and the conductive bar to prevent accidents such as short circuits. High-quality insulating materials can withstand the test of high voltage and high temperature, providing a strong guarantee for the safe operation of the motor.

As the supporting structure of the static contact assembly 6, the fastener is of great significance to maintain the stable operation of the entire assembly. The fastener firmly connects the various components together to prevent the components from loosening or displacement due to vibration or impact. At the same time, appropriate fastening force can reduce contact resistance and improve current transmission efficiency.

In order to ensure the safety and reliability of the static contact assembly 6, some auxiliary components, such as springs and sealing rings, are usually provided. Although these components are small, they play an indispensable role in maintaining the normal operation of the static contact assembly 6. For example, the spring can provide a certain contact pressure to ensure good contact between the contacts; the sealing ring can prevent moisture and dust from entering the interior of the static contact, thereby extending the service life of the assembly.

During specific implementation, the electromagnetic assembly 9 includes but is not limited to: an armature winding, an excitation winding, a commutator, and the like.

The armature winding is one of the core electromagnetic components in the DC motor. It is made of insulated wires wound into multiple coils and fixed to the armature core. When DC current passes through the armature winding, a magnetic field is generated, which interacts with the rotor magnetic field to drive the motor to rotate. The function of the armature winding is to realize the conversion of electrical energy into mechanical energy, which is a key factor in the normal operation of the DC motor.

The excitation winding generates a magnetic field from the excitation current, which is used to control the operating state of the motor. The current of the excitation winding is provided by the excitation power supply, and its function is to adjust the strength and direction of the magnetic field inside the motor, thereby controlling the output torque and speed of the motor. The excitation winding has a vital influence on the performance and stability of the motor.

The commutator consists of multiple commutator segments, which are fixed to the rotor and evenly distributed along the circumference. The function of the commutator is to ensure that the current in the armature winding is commutated at the correct time and position to maintain the continuous rotation of the motor. The working principle of the commutator is to conduct and commutate the current through the contact between the brush and the commutator segment, which is essential for the normal operation and stability of the DC motor.

The electromagnetic component 9 plays a core role in the intelligent protection device for DC motors. The coordinated work of the armature winding, the field winding and the commutator enables the DC motor to achieve efficient energy conversion and stable operation. The electromagnetic component 9 is of great significance for improving the performance of the DC motor and extending its service life.

In specific implementation, the auxiliary component 10 includes: a temperature sensor for monitoring the temperature of the motor to prevent performance degradation or damage caused by overheating. The temperature sensor is used to monitor the temperature of the motor to prevent performance degradation or damage caused by overheating. When the temperature is too high, the intelligent protection device can trigger an alarm or automatically shut down the motor to protect the motor from heat damage.

In a specific implementation, the auxiliary component 10 also includes: a current sensor for monitoring the input current of the motor. By monitoring the current, the device can determine the load state and operating condition of the motor. By monitoring the current, the device can determine the load state and operating condition of the motor. When the current is too large or too small and exceeds the preset range, the device can take corresponding measures, such as reducing the load or shutting down the motor, to prevent the equipment from being damaged by the current shock.

The auxiliary component 10 also includes: a voltage sensor and a Hall element. The voltage sensor is used to monitor the input voltage of the motor, and the Hall element is used to detect the speed and position of the motor. Voltage fluctuations may affect the normal operation of the motor. The voltage sensor can monitor the voltage in real time to ensure that the motor operates under a stable voltage. The Hall element is essential for controlling the speed and position of the motor and achieving precise motor control. Through the information fed back by the Hall element, the intelligent protection device can adjust the operating state of the motor to ensure that it operates within the set parameter range.

In specific implementation, the auxiliary component 10 may also include a contactor and a relay. The contactor and the relay can control the start, stop and direction of the motor, and quickly cut off the power supply in an emergency to prevent the accident from expanding.

Auxiliary components 10 such as temperature sensors, current sensors, voltage sensors, Hall elements, contactors and relays play their own unique roles in the DC motor intelligent protection device, and together provide strong protection for the safe and stable operation of the motor.

In specific implementation, the utility model can also be provided with a memory, and the memory stores all parameters when a fault occurs. In this way, the utility model has a fault memory function. Even after the power is cut off, it can record all parameters when a fault occurs, which is convenient for subsequent fault troubleshooting and repair.

The working principle of the utility model is:

When the DC motor operates normally, the current generates a magnetic field through the electromagnetic component, attracting the moving iron core to move, closing the moving contact assembly and the static contact assembly, and the motor is powered normally. When the motor is overloaded or short-circuited, the input current and voltage are abnormal, triggering the protection circuit in the device. According to the actual operating state of the motor, the protection circuit will control the magnetic field of the electromagnetic component to weaken or disappear, reset the moving iron core, disconnect the moving contact assembly from the static contact assembly, thereby cutting off the power supply of the motor and protecting the motor from damage caused by overload or short-circuit faults. In the device, insulating paper is used to ensure the insulation performance of the circuit; the spring seat and the reaction spring are used to provide contact pressure and buffer the suction impact; the waterproof cover is used to prevent external moisture from entering the interior of the device; the ejector and the moving iron core are used to transmit the magnetic field force; the auxiliary components include bowl pads and ejector rods, etc., which are used to fix and position other components. The waterproof cover clamps the static contact assembly and places the electromagnetic device, so that when the motor is working, the internal part of the product will not be displaced, protecting the internal part of the device from the external environment, and can be used to be installed on the customer's product.

Through the coordinated work of these components, the DC motor intelligent protection device can monitor the operating status of the motor in real time and quickly cut off the power supply when necessary, effectively protecting the safe operation of the motor.

DC motors may encounter various problems during operation, such as overload, undervoltage, short circuit, etc., which may damage the motor. The DC motor intelligent protection device is designed to monitor these parameters in real time. Once an abnormality is found, the power supply is immediately cut off to protect the motor from damage.

The sensor can monitor the motor's current, voltage and other key parameters in real time and convert these parameters into processable signals. Then the microprocessor processes the signal. After receiving the signal from the sensor, the microprocessor uses the built-in algorithm to make a judgment. If any abnormality is found, a control signal will be issued immediately. Finally, the actuator acts. After receiving the control signal, the actuator will immediately cut off the power supply to prevent the abnormal situation from developing further.

In addition, the utility model DC motor intelligent protection device also has a fault memory function. Even after the power is cut off, it can record all parameters when the fault occurs, which is convenient for subsequent fault detection and repair.

The DC motor intelligent protection device provides a solid guarantee for the safe operation of the DC motor with its accurate monitoring, fast response and powerful fault memory function. In the future, with the continuous development of technology, we believe that the performance of this intelligent protection device will be further improved, providing a more stable and reliable power for our industrial production.

The utility model has the following beneficial effects through the design of the above embodiments: the key parameters of the motor such as the current and voltage are monitored in real time through the sensor, and these parameters are converted into processable signals; after the microprocessor receives the signal from the sensor, if any abnormality is found, the microprocessor will immediately send a control signal; after the actuator receives the control signal, the actuator immediately cuts off the power supply to prevent the abnormal situation from further developing; with accurate monitoring, fast response and powerful fault memory function, a solid guarantee is provided for the safe operation of the DC motor; by adopting an electronic switch and an accurate timing device, the user can automatically cut off the power half an hour after the end of use, avoiding accidents caused by forgetting to cut off the power and causing false triggering, as well as power consumption problems; through a single timing design, a single working time is set to a custom time such as one minute, and the power supply is automatically cut off when the custom time such as one minute is exceeded, which solves the problem of non-stopping caused by mechanical switch adhesion during the use of traditional products; a current detection function is added, which can automatically analyze whether the product is in a normal working state or an overload state. If the product is detected to be overloaded, the power supply is quickly cut off to avoid problems such as excessive line current causing heating and fire of the wire.

The present invention is described according to specific embodiments, but those skilled in the art should understand that various changes and equivalent substitutions can be made without departing from the scope of the present invention. In addition, in order to adapt to specific occasions of the present invention technology, many modifications can be made to the present invention without departing from its protection scope. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all embodiments that fall within the scope of protection of the claims.

Claims (10)

1. A DC motor intelligent protection device, characterized in that it includes: Center rod, bowl pad, dynamic spring, spring seat, dynamic contact assembly, static contact assembly, base, insulating paper, electromagnetic assembly, auxiliary assembly, ejector rod, reaction spring, dynamic iron core, contact seat, waterproof cover, PCB board, upper cover, connector; Wherein, the central rod is vertically arranged at the center of the DC motor intelligent protection device, and is used to support and fix the DC motor intelligent protection device; The bowl pad is vertically arranged on the center rod, and is used to fix the moving contact assembly, the moving spring and the stationary contact assembly to prevent them from sliding off, and the moving contact assembly and the stationary contact assembly are fixed by the bowl pad; The dynamic spring is arranged on the central rod, and is used to connect the top rod and the dynamic contact assembly, and provides necessary elasticity when the contact is opened or closed; The spring seat is arranged on the moving contact assembly and is used to fix the moving spring to ensure its normal operation; The moving contact assembly is arranged on the contact seat and is used to connect or disconnect the circuit; The static contact assembly is arranged on the contact seat, cooperates with the moving contact assembly, and is detachably connected to facilitate maintenance and replacement; The base is fixedly connected to the center rod, provides a mounting base for the device, and is fixedly connected to the motor housing. The base fixes the static contact assembly and the electromagnetic assembly by screws; The electromagnetic assembly is used to generate a magnetic field, and control the switch state of the contact by attracting and releasing the moving iron core; The auxiliary component includes a waterproof cover to protect the interior of the device from being affected by the external environment. When the circuit is on and off, the auxiliary component is used to maintain the electromagnetic component; The ejector rod is connected to the moving spring and the moving contact assembly to transmit the action force; The reaction spring acts on the top rod to provide a reaction force when the contacts are opened or closed; The moving iron core is used to be attracted and released by the magnetic field of the electromagnetic assembly to drive the contact seat to move; The contact seat is arranged on the central rod and cooperates with the moving contact assembly to connect the moving iron core and the contact; The PCB board is provided with a timing circuit to realize the control and protection functions of the device; The upper cover is used to fix and protect the interior of the device from being affected by the external environment; The connector is used to connect to an external circuit. 2. The intelligent protection device for a DC motor according to claim 1 is characterized in that the device also includes insulating paper, which is arranged between the electromagnetic component and the base to isolate the electromagnetic component and the base to enhance electrical safety. 3. The intelligent protection device for a DC motor according to claim 1 is characterized in that the device also includes a waterproof cover for preventing moisture from entering the interior of the device and improving its waterproof performance. 4. The intelligent protection device for a DC motor according to claim 1 is characterized in that the moving contact assembly comprises a moving contact, a drive mechanism, an arc extinguishing module, and an auxiliary contact that are electrically connected. 5. The intelligent protection device for a DC motor according to claim 1, characterized in that the static contact assembly comprises a static contact, a conductive bar, and a fastener. 6 . The intelligent protection device for a DC motor according to claim 1 , wherein the electromagnetic component comprises: an armature winding, an excitation winding and a commutator. 7. The intelligent protection device for a DC motor according to claim 1 is characterized in that the auxiliary component further comprises: a temperature sensor for monitoring the temperature of the motor to prevent performance degradation or damage caused by overheating. 8. The intelligent protection device for a DC motor according to claim 1 is characterized in that the auxiliary component further comprises: a current sensor for monitoring the input current of the motor, and by monitoring the current, the device can determine the load state and operating condition of the motor. 9. The intelligent protection device for a DC motor according to claim 1 is characterized in that the auxiliary component further comprises: a voltage sensor and a Hall element, wherein the voltage sensor is used to monitor the input voltage of the motor, and the Hall element is used to detect the rotation speed and position of the motor. 10. The intelligent protection device for a DC motor according to any one of claims 1 to 9, characterized in that the timing circuit comprises: a microcontroller, a timer, a power management unit, an input device, an output device and a protection relay.