New energy automobile charging gun folding and unfolding device and use method

Abstract

The invention relates to the technical field of charging pile auxiliary equipment, and discloses a new energy automobile charging gun take-up and pay-off device and a using method.The device comprises a mounting frame, a driving wire extruding wheel and a driven wire extruding wheel are arranged on one side of the mounting frame, the driving wire extruding wheel is driven by a gear motor, and the driven wire extruding wheel is close to the driving wire extruding wheel through an elastic structure; the induction wheel is located on the front side of the driving wire extruding wheel and installed on a potentiometer assembly sliding block which only plays a bearing role, and the installation frame is further provided with a guide wheel and a front-back guide block. The using method comprises the steps of paying-off operation, charging state judgment, take-up triggering verification and automatic take-up homing, and a manager linkage homing step can be additionally arranged. Through motor driving and double verification, automatic take-up of the charging gun is achieved, exposure is prevented, safety is guaranteed, and take-up is accurate; the induction wheel and the position sensor are matched with a collaborative algorithm, so that paying-off is labor-saving and smooth; and the method adapts to existing charging piles, parameters are adjustable, and application is wide.

Description

Technical Field

[0001] This invention relates to the field of charging pile auxiliary equipment technology, and more specifically, to a device and method for live-line working on short poles in power distribution networks. Background Technology

[0002] With the advancement of global energy transition and dual-carbon goals, new energy vehicles, as the core carrier of green transportation, have experienced explosive growth in industry scale. The global number of new energy vehicles has exceeded hundreds of millions. As the world's largest producer and seller of new energy vehicles, my country's market penetration rate continues to climb. Charging piles, as a core supporting infrastructure for the industry's development, have seen their construction scale and coverage expand continuously, and to date, China has built the world's largest charging network. The ease of use, operational safety, and reliability of charging piles not only directly affect users' travel experience but are also key factors determining the speed of new energy vehicle adoption and ensuring energy supply security, attracting significant attention from both the industry and consumers.

[0003] However, the charging gun retraction and deployment structures of mainstream charging piles on the current market still have many technical shortcomings, making it difficult to adapt to the increasing usage demands and diverse application scenarios. Charging gun cables, due to the need to meet high current transmission requirements, are generally heavy and lack flexibility. After charging, users often carelessly leave the charging guns on the ground, next to the charging pile, or at the edge of the awning due to the difficulty of retrieval and a lack of awareness of proper placement. Even with awnings providing shelter, this careless placement still exposes the charging gun and cable directly to rain, sun, and dust. The charging gun interface is prone to moisture damage from rain and aging from sun exposure, and the cable insulation is susceptible to environmental corrosion or damage from ground friction. This not only poses safety hazards such as leakage and short circuits, threatening the safety of pedestrians and vehicles, but also significantly shortens the lifespan of the charging pile's core components and increases the maintenance costs for operators. Therefore, a new energy vehicle charging gun retraction and deployment device and its usage method are urgently needed to solve these problems. Summary of the Invention

[0004] To address the aforementioned technical issues, this invention provides a charging gun retraction and deployment device and method for new energy vehicles. The device achieves automatic charging gun retraction through motor drive and dual verification, ensuring safety and precise retraction while preventing exposure. A sensing wheel and position sensor, combined with a collaborative algorithm, make cable deployment effortless and smooth. It is compatible with existing charging piles, has adjustable parameters, and is widely applicable.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A charging gun retraction device for new energy vehicles, including:

[0007] The mounting frame serves as a support for installation. On one side of the mounting frame, there are active extrusion rollers and passive extrusion rollers distributed vertically. The active extrusion rollers are driven by a reduction motor, and the passive extrusion rollers move closer to the active extrusion rollers under the action of an elastic structure to ensure sufficient friction.

[0008] The sensing wheel is located in front of the active extrusion wheel. The sensing wheel is mounted on the slider of the potentiometer assembly, and the potentiometer assembly is mounted on the mounting bracket on the same side of the active extrusion wheel.

[0009] A guide wheel is rotatably mounted on the mounting bracket on the same side as the active extrusion wheel. The charging gun cable passes around the guide wheel clockwise and then extends out from the front guide block.

[0010] In a preferred embodiment of the present invention, the passive extrusion wheel is rotatably mounted on the mounting frame via a mounting swing frame, and a spring is provided between the mounting swing frame and the spring hanger.

[0011] As a preferred embodiment of the present invention, it further includes an outer housing, the front and rear of which are provided with openings for the charging gun cable to pass through, a rear guide block is provided at the cable inlet on the rear side of the housing, the rear guide block is fixedly mounted on the mounting bracket, and the front guide block is located on the side of the housing where the openings appear.

[0012] In a preferred embodiment of the present invention, the geared motor is controlled by a microcontroller, the potentiometer assembly is electrically connected to the microcontroller, and the microcontroller is electrically connected to the charging pile body.

[0013] A method for using a charging gun retraction device for new energy vehicles is also provided. The charging gun cable enters through the inlet port at the back of the housing. The cable path is: rear guide block, between the active extrusion wheel and the passive extrusion wheel, the lower circumference of the induction wheel, the upper circumference of the guide wheel, the front guide block, and finally extends out from the outlet port of the housing. Before daily charging, the charging gun is inserted into the interface of the charging pile body.

[0014] The usage method includes the following steps:

[0015] S1. Cable release operation: The user holds the charging gun and applies a pulling force to pull it outward. The potentiometer component connected to the induction wheel collects data and then transmits the data to the microcontroller. The microcontroller uses a pre-stored collaborative algorithm to analyze and calculate the user's pulling operation pattern, generates a motor rotation speed command that matches the pulling rhythm, controls the geared motor to drive the active extrusion wheel to rotate, and synchronously assists in releasing the charging cable so that the user can connect the charging gun to the vehicle's charging port.

[0016] S2. Charging status determination: After the charging gun is inserted into the vehicle's charging port, the latch at the charging gun socket is pressed and triggered. The latch sensor sends a disconnect signal, and at the same time, the gun head sensor detects that current is flowing through the cable. The system determines that the charging gun is in use and does not trigger the cable retraction command.

[0017] S3, Retracting the cable triggers verification; After charging is complete, the user unplugs the charging gun, the latch switch resets, the latch sensor sends a closing signal, and the system starts dual verification: continuously monitoring the closing status of the latch switch, and monitoring the current in the cable through the gun head sensor;

[0018] S4. Automatic cable retraction and return to position: If the system detects that the latch switch remains closed and no current flows through the cable, it determines that the charging gun is in an idle state and triggers the geared motor to start. The geared motor drives the active extrusion wheel to rotate in the forward direction. The passive extrusion wheel, under the action of the elastic structure, cooperates with the active extrusion wheel to generate friction, which drives the charging cable to retract in an orderly manner until the charging gun is accurately returned to the storage position at the front of the cable retraction device.

[0019] As a preferred embodiment of the present invention, the data acquisition in S1 specifically involves: the sensing wheel moving up and down with the cable, causing the slider of the potentiometer assembly to move synchronously; the potentiometer assembly converting the mechanical displacement into a linear electrical signal and transmitting it to the microcontroller in real time; the microcontroller combining the time change of the displacement to calculate the displacement change amount and displacement change speed data.

[0020] As a preferred embodiment of the present invention, the microcontroller in S1 takes the displacement change, the real-time speed of the user pulling, and the preset user normal acceleration range as core inputs. It first calculates the real-time acceleration and average acceleration of the user pulling, and then calculates the dynamic compensation amount by combining the adaptation coefficient and the acceleration compensation coefficient. Finally, it generates the target speed command of the motor to control the operation of the geared motor.

[0021] As a preferred embodiment of the present invention, the passive extrusion wheel is provided with an elastic force by the spring between the mounting frame and the spring hanger, so that the passive extrusion wheel moves closer to the active extrusion wheel, ensuring that sufficient friction is generated between the cable and the two wheels.

[0022] As a preferred embodiment of the present invention, in S4, when the charging gun is accurately positioned at the storage position at the front end of the take-up device, the charging gun touches the limit sensor of the preset storage position at the front end of the take-up device. The limit sensor feeds back a positioning signal, and the microcontroller controls the reduction motor to stop running, thus completing the accurate positioning of the charging gun at the storage position at the front end of the take-up device.

[0023] As a preferred embodiment of the present invention, it also includes a step of repositioning the charging gun in conjunction with the management personnel. Specifically, when the position signal from the limit sensor and the closing signal from the latch sensor in S4 are both transmitted to the microcontroller, and the microcontroller detects that the position signal from the limit sensor lasts for a duration exceeding the trigger threshold time, while the latch sensor still maintains a closed signal, the microcontroller determines that the charging gun is temporarily repositioned to the front end of the cable retractor and transmits this determination result to the charging pile main control module. After receiving the determination result from the microcontroller, the charging pile main control module sends a message to the management personnel terminal via the built-in 4G or NB-IoT communication module. The notification instruction includes the device number, the physical location of the charging pile, the temporary return time of the charging gun, and an operation prompt to insert the charging gun into the storage slot of the charging pile body. After the management personnel arrive at the site, they pull out the charging gun at the front end of the cable retraction device and insert it into the designated storage slot of the charging pile body, and squeeze the storage slot latch switch. The disconnection signal fed back by the latch sensor is transmitted to the microcontroller, which transmits the fully returned status signal to the charging pile main control module. The charging pile main control module updates the device status to fully returned and sends a confirmation notification of return completion to the management personnel terminal through the communication module, completing the entire retraction and deployment process.

[0024] The beneficial technical effects of this invention are:

[0025] This invention achieves automatic cable retraction and return of the charging gun by combining a motor drive system with a dual verification mechanism. When the charging gun is not returned to its original position and there is no charging current, the system automatically triggers cable retraction. Through the cooperation of the active and passive extrusion wheels, the cable is retracted in an orderly manner, avoiding long-term exposure of the charging gun and cable, effectively preventing leakage accidents in severe weather, and ensuring user safety and stable operation of the charging pile equipment.

[0026] This invention uses a dual verification system of a charging gun socket latch sensor and a gun head current sensor to accurately determine the charging gun's usage status, temporary return status, and non-return status. The system only triggers the motor to run when the cable retraction conditions are met, effectively avoiding situations such as accidental cable retraction or missed cable retraction when the charging gun is not in the correct position, thus improving the reliability of the device's operation.

[0027] This invention utilizes a linkage design between a sensing wheel and a position sensor to obtain displacement and speed data of the user pulling the cable, providing precise assistance. Users experience no jamming or pulling sensation when pulling the cable, resulting in smooth and effortless operation, significantly reducing the difficulty of cable pulling and catering to the needs of diverse users.

[0028] This invention can be flexibly adapted to existing charging piles without requiring large-scale modifications. At the same time, parameters such as the adaptation coefficient and acceleration range in the collaborative algorithm can be dynamically adjusted according to cable weight and usage scenario to adapt to charging piles of different power and specifications, and has broad application prospects. Attached Figure Description

[0029] Figure 1 This is a first perspective view of the charging gun retraction device of the present invention;

[0030] Figure 2 This is a second perspective view of the charging gun retraction device in this invention;

[0031] Figure 3 This is a schematic diagram of the overall state of the charging gun retraction device in this invention;

[0032] Figure 4 This is a schematic diagram of the signal connection relationship in this invention.

[0033] In the diagram: 100, main body of charging pile; 200, gun retraction and extension device assembly; 1, mounting frame; 2, active extrusion wheel; 3, passive extrusion wheel; 31, mounting frame; 4, induction wheel; 5, guide wheel; 6, geared motor; 7, spring-loaded pile; 8, rear guide block; 9, front guide block; 10, potentiometer assembly. Detailed Implementation

[0034] In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] Combination Figure 1 - Figure 3 The present invention provides the following embodiments:

[0036] Example 1:

[0037] A charging gun retraction device for new energy vehicles, including:

[0038] The mounting frame 1 serves as a support for the cable. On one side of the mounting frame 1 are two vertically distributed active extrusion rollers 2 and passive extrusion rollers 3. The active extrusion roller 2 is driven by a reduction motor 6. The passive extrusion roller 3, under the action of an elastic structure, moves closer to the active extrusion roller 2 to ensure sufficient friction. The passive extrusion roller 3 is a non-powered roller. Under the action of the elastic structure, the passive extrusion roller 3 moves closer to the active extrusion roller 2, clamping the cable passing between the active extrusion roller 2 and the passive extrusion roller 3, thereby ensuring that the cable can be stably extended or retracted during the cable extension and retraction process assisted by the reduction motor 6.

[0039] The sensing wheel 4 is located in front of the active extrusion wheel 2. The sensing wheel 4 is mounted on the slider of the potentiometer assembly 10, and the potentiometer assembly 10 is mounted on the mounting bracket 1 on the same side as the active extrusion wheel 2. A position sensor is fixedly mounted on the sensing wheel 4. The position sensor is electrically connected to the microcontroller. When the wire is pulled out, the sensing wheel 4 moves up and down with the cable. The position sensor on it synchronously collects the displacement change and the time change data of the displacement, and transmits the raw collected data to the microcontroller in real time. Based on the received raw data, the microcontroller calculates the displacement change and the displacement change rate data.

[0040] The guide wheel 5 is rotatably mounted on the mounting bracket 1 on the same side as the active extrusion wheel 2. The charging gun cable passes clockwise around the guide wheel 5 and then extends out from the front guide block 9. The guide wheel 5 serves as a guide to ensure smooth cable take-up and output.

[0041] In a preferred embodiment of the present invention, the passive extrusion wheel 3 is rotatably mounted on the mounting frame 1 via a mounting bracket 31, and a spring is provided between the mounting bracket 31 and the spring hanger 7. Specifically, the two ends of the spring are respectively mounted on the spring hanger and the mounting bracket mounting position, and the spring is always in a compressed state after installation. Under the action of the spring, the passive extrusion wheel mounted on the mounting bracket will move closer to the active extrusion wheel.

[0042] As a preferred embodiment of the present invention, it further includes an outer housing, the housing having openings at the front and rear for the charging gun cable to pass through, a rear guide block 8 being provided at the rear cable inlet of the housing, the rear guide block 8 being fixedly mounted on the mounting bracket 1, and a front guide block 9 being located on the side of the housing with the openings. Figure 3 After the housing is installed, the whole device, such as the retractable gun assembly 200, is located on one side of the charging pile body 100 in this embodiment. The cable enters from the inlet port at the rear end of the retractable gun assembly 200, passes through the rear guide block 8, passes between the active extrusion wheel 2 and the passive extrusion wheel 3, goes around the lower circumference of the induction wheel 4, then around the upper circumference of the guide wheel 5, and finally passes through the front guide block 9 and the outlet port in sequence before extending out. Under normal circumstances, the charging gun at the end of the cable is placed in the interface of the charging pile body 100.

[0043] In a preferred embodiment of the present invention, the geared motor 6 is controlled by a microcontroller, which is electrically connected to the charging pile body 100.

[0044] Combination Figure 4 Specifically, the signal chain is clear, and the control logic is correct and complete.

[0045] Example 2:

[0046] A method for using a charging gun retraction device for new energy vehicles is also provided. The charging gun cable enters through the inlet port at the back of the housing. The cable path is: rear guide block 8, between the active extrusion wheel 2 and the passive extrusion wheel 3, the lower circumference of the induction wheel 4, the upper circumference of the guide wheel 5, the front guide block 9, and finally extends out from the outlet port of the housing. Before daily charging, the charging gun is inserted into the interface of the charging pile body 100.

[0047] The usage method includes the following steps:

[0048] S1. Cable release operation: The user holds the charging gun and applies a pulling force to pull it outward. The position sensor on the sensing wheel 4 collects the displacement change and the time change data of the displacement in real time, and then transmits the raw data to the microcontroller. The microcontroller uses a pre-stored collaborative algorithm to analyze and calculate the user's pulling operation pattern, and generates a motor rotation speed command that matches the pulling rhythm. It controls the reduction motor 6 to drive the active extrusion wheel 2 to rotate, and simultaneously assists in releasing the charging cable, so that the user can connect the charging gun to the vehicle's charging port.

[0049] S2. Charging status determination: After the charging gun is inserted into the vehicle's charging port, the latch at the charging gun socket is pressed and triggered. The latch sensor sends a disconnect signal, and at the same time, the gun head sensor detects that current is flowing through the cable. The system determines that the charging gun is in use and does not trigger the cable retraction command.

[0050] S3, Retracting the cable triggers verification; After charging is complete, the user unplugs the charging gun, the latch switch resets, the latch sensor sends a closing signal, and the system starts dual verification: continuously monitoring the closing status of the latch switch, and monitoring the current in the cable through the gun head sensor;

[0051] S4. Automatic cable retraction and return to position; if the system detects that the latch switch remains closed and no current flows through the cable, it determines that the charging gun is in an idle state and triggers the geared motor 6 to start. The geared motor 6 drives the active extrusion wheel 2 to rotate in the forward direction. The passive extrusion wheel 3, under the action of the elastic structure, cooperates with the active extrusion wheel to generate friction, which drives the charging cable to retract in an orderly manner until the charging gun is accurately returned to the storage position at the front of the cable retraction device.

[0052] As a preferred embodiment of the present invention, the data acquisition and calculation in S1 specifically involves: the sensing wheel 4 moving up and down as it is pulled by the cable, and the position sensor on it synchronously acquiring the time change data of the displacement change, the displacement start time and the termination time, and transmitting the raw data to the microcontroller in real time; the microcontroller, in conjunction with the pre-stored displacement calculation parameters, calculates the displacement change and the real-time pulling speed data.

[0053] The position sensor directly adapts to the mechanical movement of the sensing wheel, accurately capturing dynamic information in the displacement and time dimensions, avoiding loss and delay in intermediate signal conversion links; the microcontroller, as the computing core, completes accurate calculations based on the raw collected data, providing direct and reliable input for the collaborative algorithm, ensuring real-time matching between the line-laying assistance and the user's pulling rhythm, and guaranteeing the smoothness of human-machine collaboration.

[0054] As a preferred embodiment of the present invention, the microcontroller in S1 takes the displacement change, the real-time speed of the user pulling, and the preset user normal acceleration range as core inputs. It first calculates the real-time acceleration and average acceleration of the user pulling, and then calculates the dynamic compensation amount by combining the adaptation coefficient and the acceleration compensation coefficient. Finally, it generates the target speed command of the motor to control the operation of the geared motor 6.

[0055] By analyzing the difference between real-time acceleration and average acceleration, changes in the user's pulling rhythm can be dynamically captured; the adaptation coefficient is used to offset the load differences caused by cable weight and frictional resistance, and the acceleration compensation coefficient can correct the instantaneous fluctuations in the user's operation. The dynamic compensation amount calculated by combining the two can keep the target speed of the motor and the user's pulling speed at a small deviation. From the algorithm level, it realizes seamless coordination between the user's action and the motor response, completely eliminating the stuttering and pulling sensation during the pulling process, and adapting to the operating needs of people with different strengths.

[0056] As a preferred embodiment of the present invention, the passive extrusion wheel 3 is provided with an elastic force by the spring between the mounting bracket 31 and the spring hanger 7, so that the passive extrusion wheel 3 moves closer to the active extrusion wheel, ensuring that sufficient friction is generated between the cable and the two wheels.

[0057] It always ensures a stable positive pressure between the cable and the active and passive extrusion rollers; combined with the frictional characteristics of the roller surface and the cable, the generated frictional force can not only meet the power transmission requirements of the motor-driven cable winding and unwinding, and prevent the cable from slipping, but also prevent excessive extrusion pressure from causing cable wear, thus achieving a balance between power transmission and cable protection, and ensuring the smooth and reliable winding and unwinding operation.

[0058] As a preferred embodiment of the present invention, in S4, when the charging gun is accurately positioned at the storage position at the front end of the take-up device, the charging gun touches the limit sensor of the preset storage position at the front end of the take-up device. The limit sensor feeds back a positioning signal, and the microcontroller controls the reduction motor 6 to stop running, thus completing the accurate positioning of the charging gun at the storage position at the front end of the take-up device.

[0059] As the core component of the return-to-position detection, the limit sensor can provide real-time feedback on the physical position of the charging gun, preventing the charging gun from excessively squeezing the device or failing to return to its proper position due to continuous motor operation. After receiving the position signal, the microcontroller immediately triggers the motor to stop, forming a closed-loop control of the wire retraction action, position detection, and stop command. This ensures that the charging gun is in a fixed temporary storage position after each wire retraction, providing a clear physical positioning basis for subsequent management personnel to coordinate the return to position, while also preventing the motor from running dry or being damaged by overload.

[0060] As a preferred embodiment of the present invention, it also includes a step of repositioning the charging gun in conjunction with the management personnel. Specifically, when the position signal from the limit sensor and the closing signal from the latch sensor in S4 are both transmitted to the microcontroller, and the microcontroller detects that the position signal from the limit sensor lasts for a duration exceeding the trigger threshold time, while the latch sensor still maintains a closed signal, the microcontroller determines that the charging gun is temporarily repositioned to the front end of the cable retractor and transmits this determination result to the charging pile main control module. After receiving the determination result from the microcontroller, the charging pile main control module sends a message to the management personnel terminal via the built-in 4G or NB-IoT communication module. The notification instruction includes the device number, the physical location of the charging pile, the temporary return time of the charging gun, and an operation prompt to insert the charging gun into the storage slot of the charging pile body. After the management personnel arrive at the site, they pull out the charging gun at the front end of the cable retraction device and insert it into the designated storage slot of the charging pile body, and squeeze the storage slot latch switch. The disconnection signal fed back by the latch sensor is transmitted to the microcontroller, which transmits the fully returned status signal to the charging pile main control module. The charging pile main control module updates the device status to fully returned and sends a confirmation notification of return completion to the management personnel terminal through the communication module, completing the entire retraction and deployment process.

[0061] By linking the logic of microcontroller judgment, communication with the charging pile main control module, and execution and status feedback by management personnel, the limitation of automatic retraction, which can only achieve temporary repositioning, is overcome. The setting of trigger threshold time can avoid false notifications, the 4G / NB-IoT communication module ensures the timeliness of remote notifications, and the device number and physical location information can quickly locate the target charging pile. Finally, the disconnection signal of the latch sensor confirms complete repositioning, forming a closed loop of temporary repositioning, manual final inspection, and complete repositioning. This completely eliminates the safety hazards of long-term exposure of the charging gun and improves the accuracy and efficiency of equipment operation and maintenance.

[0062] In summary, the specific steps are as follows:

[0063] 1. Laying out the line

[0064] 1.1 When the user holds the charging gun and applies an outward pulling force, the charging cable causes the induction wheel 4 to move up and down; the position sensor installed on the induction wheel 4 responds synchronously, collecting the displacement change and displacement start time of the induction wheel in real time. and termination time The time change data; the sensing wheel 4 is mounted on the slider of the potentiometer assembly 10. The potentiometer assembly only serves as a mounting support and does not participate in signal conversion and data acquisition.

[0065] 1.2 The position sensor transmits the collected displacement and time raw data to the microcontroller in real time;

[0066] 1.3 After receiving the signal, the microcontroller completes the core data calculation based on the pre-stored parameters and the cooperative algorithm:

[0067] displacement change It is determined after calibration from the raw displacement data collected by the position sensor;

[0068] Real-time pulling speed , ,in The start time of displacement collected by the position sensor With end time The time interval;

[0069] Real-time acceleration , ,in The speed is adjusted in real time for the current data collection cycle. The speed is adjusted in real time for the previous data collection cycle. For fixed data collection cycles;

[0070] average acceleration Calculate according to the following formula:

[0071] ,in The initial pulling speed of the line. The speed is adjusted in real time for the current data collection cycle. For the cumulative pulling time;

[0072] Motor target speed : ,

[0073] Wherein: adaptation coefficient Dynamically corrected based on cable weight and wheel system friction coefficient; dynamic compensation amount. Acceleration compensation coefficient .

[0074] 1.4. The microcontroller will The command is sent to the motor drive module, which controls the geared motor 6 to drive the active extrusion wheel 2 to rotate synchronously, assisting in the release of the charging cable and ensuring the entire process is safe. To avoid any jamming or pulling sensation when the user pulls the charging gun, until the user connects the charging gun to the vehicle's charging port.

[0075] 2. Charging Status Determination

[0076] 2.1 After the charging gun is inserted into the vehicle's charging port, the latch at the charging gun socket is pressed and triggered, and the latch sensor sends a disconnect signal.

[0077] 2.2 The head sensor monitors the current in the cable in real time. When current is detected... At that time, the microcontroller determines that the charging gun is in use; among which The minimum current threshold for starting charging is determined by the rated power of the charging pile.

[0078] 2.3 After dual signal confirmation, the microcontroller locks the cable retraction command to ensure that the cable remains stable during charging and does not trigger the cable retraction action; if the charging gun is inserted into the designated storage position of the charging pile body 100, the latch sensor will also send back a disconnect signal, and the microcontroller will determine that the cable has returned to its normal position and will not trigger the cable retraction.

[0079] 3. Verification triggered upon closing the line.

[0080] 3.1 After charging is complete, the user unplugs the charging gun, the latch switch resets, and the latch sensor sends a closing signal.

[0081] 3.2. Microcontroller-based dual verification mechanism:

[0082] Continuously monitor the closing status of the latch switch to confirm that the charging gun is not inserted into the storage compartment / vehicle charging port;

[0083] The current inside the cable is monitored by a sensor at the nozzle, and a judgment time is set. ,default If continuous Detected in seconds If so, it is determined that there is no charging current in the cable.

[0084] 3.3 When both verification conditions are met, the microcontroller determines that the charging gun is in an idle state and triggers the wire retraction preparation command.

[0085] 4. Automatic reel-in and return to position

[0086] 4.1 The microcontroller sends a take-up start command to the geared motor 6, and the geared motor 6 rotates in the forward direction, driving the active extrusion wheel 2 to rotate synchronously through the shaft;

[0087] 4.2 The passive extrusion wheel 3 is provided with elastic force by the spring between the mounting frame 31 and the spring hanging post 7, and moves closer to the active extrusion wheel 2. Stable friction is generated between the two wheels and the cable, which drives the cable to retract in an orderly manner.

[0088] 4.3 During the cable winding process, the charging cable is guided and limited by the rear guide block 8, the guide wheel 5 and the front guide block 9 to avoid tangling, deviation or excessive friction.

[0089] 4.4 Setting the take-up speed When the charging gun touches the limit sensor of the preset storage position at the front end of the cable take-up device, the limit sensor sends a signal indicating that it is in position. The microcontroller controls the geared motor (6) to stop running, and the charging gun completes the temporary return to its original position.

[0090] 5. Management personnel coordinate and return to their designated positions.

[0091] 5.1 When the duration for which the limit sensor continuously feeds back the position signal exceeds the trigger threshold time. ,default When the buckle sensor is still in a closed signal, the microcontroller will transmit the final determination result requiring manual repositioning and the equipment information to the charging pile main control module.

[0092] 5.2 After receiving the signal, the main control module of the charging pile sends an operation prompt to the management terminal through the built-in 4G or NB-IoT communication module, which includes the device number, physical location, temporary return time and please insert the charging gun into the main storage position of the charging pile.

[0093] 5.3 The management personnel go to the site, pull out the charging gun at the front end of the cable retractor and insert it into the designated storage position of the charging pile body 100, and squeeze the storage position buckle switch;

[0094] 5.4 The latch sensor sends a disconnect signal to the microcontroller, which then transmits the fully returned status signal to the charging pile main control module. The main control module updates the device status to fully returned and sends a confirmation notification to the management personnel terminal via the communication module, thus ending the entire take-up and take-down process.

[0095] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A charging gun retraction device for new energy vehicles, characterized in that, include: The mounting frame (1) serves as a support for the installation. On one side of the mounting frame (1) are an active extrusion wheel (2) and a passive extrusion wheel (3) distributed vertically. The active extrusion wheel (2) is driven by a reduction motor (6). The passive extrusion wheel (3) moves closer to the active extrusion wheel (2) under the action of the elastic structure to ensure sufficient friction. The sensing wheel (4) is located in front of the active extrusion wheel (2). The sensing wheel (4) is mounted on the slider of the potentiometer assembly (10). The potentiometer assembly (10) is mounted on the mounting bracket (1) on the same side of the active extrusion wheel (2). The guide wheel (5) is rotatably mounted on the mounting bracket (1) on the same side as the active extrusion wheel (2). The charging gun cable extends from the front guide block (9) after passing around the guide wheel (5) clockwise.

2. The new energy vehicle charging gun retraction device according to claim 1, characterized in that, The passive extrusion wheel (3) is rotatably mounted on the mounting frame (1) via the mounting bracket (31), and a spring is provided between the mounting bracket (31) and the spring hanger (7).

3. The new energy vehicle charging gun retraction device according to claim 1, characterized in that, It also includes an outer housing, with openings at the front and rear for the charging gun cable to pass through. A rear guide block (8) is provided at the cable inlet on the rear side of the housing. The rear guide block (8) is fixedly installed on the mounting bracket (1). The front guide block (9) is located on the side of the housing where the openings appear.

4. The new energy vehicle charging gun retraction device according to claim 3, characterized in that, The geared motor (6) is controlled by a microcontroller, which is electrically connected to the charging pile body (100).

5. The method of using the charging gun retraction device for new energy vehicles, characterized in that, The cable enters through the inlet port at the back of the charging gun cable device housing. The cable path is between the rear guide block (8), the active extrusion wheel (2) and the passive extrusion wheel (3), the lower circumference of the induction wheel (4), the upper circumference of the guide wheel (5), the front guide block (9), and finally extends out from the outlet port of the housing. Before daily charging, the charging gun is inserted into the interface of the charging pile body (100). The usage method includes the following steps: S1, Cable release operation; The user holds the charging gun and applies a pulling force to pull it outward. The position sensor on the sensing wheel (4) collects the displacement change and the time change data of the displacement in real time, and then transmits the original collected data to the microcontroller. The microcontroller uses the pre-stored collaborative algorithm to analyze and calculate the user's pulling operation rules, generates a motor rotation speed command that matches the pulling rhythm, controls the reduction motor (6) to drive the active extrusion wheel (2) to run, and synchronously assists in releasing the charging cable so that the user can connect the charging gun to the vehicle charging port. S2. Charging status determination: After the charging gun is inserted into the vehicle's charging port, the latch at the charging gun socket is pressed and triggered. The latch sensor sends a disconnect signal, and at the same time, the gun head sensor detects that current is flowing through the cable. The system determines that the charging gun is in use and does not trigger the cable retraction command. S3, Retracting the cable triggers verification; After charging is complete, the user unplugs the charging gun, the latch switch resets, the latch sensor sends a closing signal, and the system starts dual verification: continuously monitoring the closing status of the latch switch, and monitoring the current in the cable through the gun head sensor; S4. Automatic cable retraction and return to position; if the system detects that the latch switch remains closed and no current flows through the cable, it determines that the charging gun is in an idle state and triggers the geared motor (6) to start. The geared motor (6) drives the active extrusion wheel (2) to rotate in the forward direction. The passive extrusion wheel (3) generates friction with the active extrusion wheel under the action of the elastic structure, which drives the charging cable to retract in an orderly manner until the charging gun is accurately returned to the storage position at the front end of the cable retraction device.

6. The method of using the new energy vehicle charging gun retraction device according to claim 5, characterized in that, The data acquisition described in S1 is as follows: the sensing wheel (4) moves up and down as the cable is pulled, and the position sensor on it synchronously collects the time change data of displacement change, displacement start time and termination time, and transmits the original data to the microcontroller in real time. The microcontroller, combined with pre-stored displacement calculation parameters, calculates the displacement change and real-time pulling speed data.

7. The method of using the new energy vehicle charging gun retraction device according to claim 6, characterized in that, The microcontroller in S1 takes displacement change, real-time pulling speed data and preset user normal acceleration range as core inputs. It first calculates the real-time acceleration and average acceleration of the user pulling, and then calculates the dynamic compensation amount by combining the adaptation coefficient and acceleration compensation coefficient. Finally, it generates the target speed command of the motor to control the operation of the geared motor (6).

8. The method of using the new energy vehicle charging gun retraction device according to claim 5, characterized in that, The passive extrusion wheel (3) is provided with elastic force by the spring between the mounting frame (31) and the spring hanger (7), so that the passive extrusion wheel (3) moves closer to the active extrusion wheel, ensuring that the cable generates sufficient friction between the two wheels.

9. The method of using the new energy vehicle charging gun retraction device according to claim 5, characterized in that, In S4, when the charging gun is accurately positioned at the storage position at the front of the take-up device, the charging gun touches the limit sensor of the preset storage position at the front of the take-up device. The limit sensor sends a signal indicating that it is in position, and the microcontroller controls the geared motor (6) to stop running. The charging gun is then accurately positioned at the storage position at the front of the take-up device.

10. The method of using the new energy vehicle charging gun retraction device according to claim 9, characterized in that, It also includes a linkage operation step with the management personnel, specifically: when the position signal fed back by the limit sensor in S4 and the closing signal fed back by the latch sensor are both transmitted to the microcontroller, when the microcontroller detects that the position signal of the limit sensor lasts for a longer period than the trigger threshold time, and the latch sensor still maintains the closing signal, the microcontroller determines that the charging gun is temporarily returned to the front end of the cable retractor, and transmits the determination result to the charging pile main control module; after receiving the determination result from the microcontroller, the charging pile main control module sends a notification instruction to the management personnel terminal through the built-in 4G or NB-IoT communication module. The notification instruction includes the device number, the physical location of the charging pile, the temporary return time of the charging gun, and an operation prompt to insert the charging gun into the main storage position of the charging pile. After the management personnel arrive at the site, they pull out the charging gun at the front end of the retractor and insert it into the designated storage position on the main body of the charging pile, and squeeze the storage position latch switch; the disconnection signal fed back by the latch sensor is transmitted to the microcontroller, and the microcontroller transmits the fully returned status signal to the charging pile main control module. The charging pile main control module updates the equipment status to fully returned and sends a confirmation notification of returned status completion to the management personnel terminal through the communication module, thus completing the entire retracting and extending process.

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