Dustproof and waterproof mechanical locking mechanism of charging pile gun head

Abstract

The invention discloses a dustproof and waterproof mechanical locking mechanism for a charging pile gun head, and relates to the technical field of charging pile gun heads, the dustproof and waterproof mechanical locking mechanism comprises a gun body shell, a charging head body is arranged on the front side wall of the gun body shell, and a connecting block is fixedly mounted at the joint of the gun body shell and the charging head body; the sealing mechanism is arranged on the connecting block and comprises a sealing ring, the sealing ring is arranged on the connecting block, a cavity is formed in the front side wall of the sealing ring, the size of the cavity is the same as that of the charging head body, and an annular groove is formed in the front side wall of the connecting block; by arranging the sealing mechanism combining the slidable sealing ring and the rotary sealing door, the cavity of the sealing ring is tightly attached to the outer contour of the charging head body, and meanwhile, the two sealing doors are locked through the magnetic adsorption mechanism after being rotated and closed, so that multi-layer and full-surrounding type physical isolation of the charging head body is achieved, and the charging head body is prevented from being damaged. And the dustproof and waterproof grade and the long-term storage reliability are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of charging station gun head technology, specifically a dustproof and waterproof mechanical locking mechanism for charging station gun heads. Background Technology

[0002] With the rapid advancement of new energy technologies and the continuous expansion of the electric vehicle market, charging piles, as a key infrastructure for electric vehicle energy replenishment, are seeing a significant increase in both their penetration rate and construction speed. As one of the core components of a charging pile, the performance and reliability of the charging gun directly affect the smoothness and safety of the charging process.

[0003] A search revealed a Chinese patent with publication number CN119542812A, which discloses a piston-air-sealed gun holder and charging station. The gun holder includes a gun holder body, an airbag, a piston, a connecting rod, a spring, a movable rod, and a fixed rod. The piston is located inside the movable rod, one end of which is inserted into the fixed rod and contacts the spring. The other end of the movable rod is inserted into the gun holder body and sealed to the airbag, forming an air passage. The airbag is located around the gun holder body where the gun head is mounted. The piston-air-sealed gun holder uses an airbag seal; when the airbag deploys, it seals the gun head mounting portion of the gun holder body, achieving a sealed state. When the gun head is inserted into the gun holder body, the airbag coils. This design meets dust and water resistance requirements in both charging and non-charging states, eliminating safety hazards caused by special circumstances during charging. However, current technologies cannot provide proactive, multi-layered comprehensive protection and cleaning for the charging gun head itself. This results in the charging gun head being exposed to the environment for extended periods when not in use, causing dust and moisture to accumulate on its surface and terminal interfaces, affecting the reliability of electrical connections during subsequent charging. Furthermore, the lack of automatic cleaning functions before and after use means that fine dust particles may be introduced into the charging interface during insertion and removal, posing a long-term safety hazard. In addition, a single sealing method is insufficient to cope with complex and changing external environments, and the comprehensiveness and reliability of protection need to be improved.

[0004] Therefore, based on the above-mentioned search and combined with existing technologies, a dustproof and waterproof mechanical locking mechanism for charging pile gun heads is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a dustproof and waterproof mechanical locking mechanism for charging station gun heads, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The dustproof and waterproof mechanical locking mechanism for the charging station gun head includes: a gun body shell, a charging head body is provided on the front side wall of the gun body shell, and a connecting block is fixedly installed at the connection between the gun body shell and the charging head body; a sealing mechanism is provided on the connecting block, and the sealing mechanism includes: a sealing ring, the sealing ring is provided on the connecting block, the front side wall of the sealing ring has a cavity, the size of the cavity is the same as the size of the charging head body, and the front side wall of the connecting block has an annular groove.

[0007] Preferably, the sealing mechanism further includes: rotating columns, two of which are rotatably connected to the two ends of the front sidewall of the sealing ring respectively, and sealing doors are fixedly installed on the outer surfaces of the two rotating columns. Irregular grooves are opened at both ends of the front sidewall of the connecting block, and the irregular grooves are composed of two rectangular grooves. The sealing mechanism also includes a drive assembly and a dust collection assembly.

[0008] Preferably, the drive assembly includes: an electric actuator, which is disposed in the connecting block. The front sidewall of the connecting block has a rectangular groove on the top surface of the annular groove. The electric actuator is fixedly installed in the inner wall of the rectangular groove, and the output end of the electric actuator is connected to the rear sidewall of the sealing ring.

[0009] Preferably, the vacuuming assembly includes: a mini vacuum cleaner, two mini vacuum cleaners are provided, and are respectively fixedly installed on the front side wall of the sealed door, and each of the front side walls of the two sealed doors is provided with a mounting groove.

[0010] Preferably, the vacuuming assembly further includes: a vacuum hood, of which there are two, which are fixedly installed in two mounting slots respectively, and the mini vacuum cleaner is connected to the interior of the vacuum hood via a hose.

[0011] Preferably, one of the sealed doors has multiple magnets fixedly installed on the side wall facing the other sealed door, and the side wall of the other sealed door is made of a material that can be attracted by magnets.

[0012] Preferably, the sealing ring slides in the annular groove, and the sealing door slides in the irregular groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting a sealing mechanism that combines a sliding sealing ring and a rotating sealing door, the cavity of the sealing ring is tightly fitted with the outer contour of the charging head body. At the same time, after the two sealing doors are rotated and closed, they are locked together by a magnetic adsorption mechanism, which realizes multi-layer, full-enclosure physical isolation of the charging gun head body, significantly improving the dustproof and waterproof level and the reliability of long-term storage. 2. In this invention, by setting a dust collection component integrated on the sealed door, the mini vacuum cleaner and the dust cover work together to automatically perform negative pressure adsorption cleaning on the surface of the charging head and terminal interface during the operation of the sealing mechanism, realizing active maintenance of the charging gun head before and after use, and effectively avoiding poor contact and electrical safety hazards caused by the accumulation of dust particles. 3. In this invention, by setting up a linkage control system driven by an electric push rod, the linear motion of the electric push rod is guided by the trajectory of the irregular groove and transformed into the translation of the sealing ring and the rotation of the sealing door. This realizes the automated control of the dustproof and waterproof locking mechanism of the charging gun head, which is easy to operate, precise and reliable, and greatly improves the user experience and the level of equipment intelligence. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the shrinking structure of the closure mechanism of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the closed mechanism of the present invention; Figure 4 This is a schematic diagram of the front structure of the present invention; Figure 5 This is a partial structural diagram of the closure mechanism of the present invention; Figure 6 This is a schematic diagram of the sealing door opening structure of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the dust collection component of the present invention.

[0015] In the diagram: 1. Gun body shell; 2. Charging head body; 3. Connecting block; 4. Sealing ring; 5. Cavity; 6. Annular groove; 7. Irregular groove; 8. Rotating column; 9. Sealing door; 10. Magnet; 11. Electric push rod; 12. Rectangular groove; 13. Mini vacuum cleaner; 14. Mounting groove; 15. Vacuum cover. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom", "side", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] In one typical implementation of this application, please refer to Figures 1 to 7 As shown, the dustproof and waterproof mechanical locking mechanism of the charging gun head includes: a gun body shell 1. The gun body shell 1 serves as the main structure of the entire charging gun, and its design must consider mechanical strength, electrical safety, environmental resistance, and ergonomics. The gun body shell 1 is integrally molded from high-strength flame-retardant PC / ABS alloy material using injection molding. This material was chosen based on its excellent comprehensive performance: impact resistance exceeding 60kJ / m² (according to ISO179 standard), heat distortion temperature exceeding 110°C (according to ISO75 standard), and flame retardancy reaching UL94V-0 level, ensuring safety under extreme working conditions. The shell wall thickness has been optimized through finite element analysis, with a main body wall thickness of 2.5mm. Key stress areas, such as the interface with the connecting block 3, are reinforced to 3.5mm to withstand the mechanical stress caused by frequent insertion and removal, as well as potential accidental drops (test standard: three drops from a height of 1.5 meters to a concrete surface without functional damage).

[0019] The gun housing 1 houses a sophisticated cable management system. High-voltage DC cables and control cables (such as CAN bus and low-voltage signal lines) are separately arranged in independent shielded channels, with the inner walls of the channels covered by a metal shielding layer to effectively suppress electromagnetic interference (EMI). The cable entry points utilize multi-layered sealing rings (such as silicone material) for stress relief and waterproofing, achieving an IP67 protection rating. The surface of the gun housing 1 has a matte finish, providing both slip resistance and scratch resistance, and features a pre-drilled handgrip for an ergonomic and comfortable grip. The charging head body 2 is located on the front wall of the gun housing 1, its core function being to achieve electrical connection with the electric vehicle charging interface.

[0020] The front face of the charging head body 2 is equipped with multiple charging terminals, including DC power positive and negative terminals (DC+, DC-), protective ground (PE), communication lines (CAN_H, CAN_L), and low-voltage auxiliary power (A+, A-). The terminals are made of high-conductivity, high-wear-resistant copper alloys (such as tellurium copper or chromium zirconium copper), and are silver- or nickel-plated (plating thickness typically 3-8 μm) to reduce contact resistance (requiring less than 0.5 mΩ) and enhance corrosion resistance. An insulating sheath made of high-temperature resistant, flame-retardant PBT or PPS plastic surrounds the terminals. A waterproof sealing ring is provided at the connection between the charging head body 2 and the gun housing 1.

[0021] A connecting block 3 is fixedly installed at the connection between the gun body shell 1 and the charging head body 2. The connecting block 3 is a key structural component that connects the gun body shell 1 and the charging head body 2 and supports the sealing mechanism. It is fixed to the gun body shell 1 by four M6 stainless steel hex bolts, and the mating surfaces are coated with sealant (such as silicone sealant) to ensure waterproofing. The connecting block 3 is also made of high-strength engineering plastic (such as PA66+GF30, i.e., Nylon 66 with 30% glass fiber) to provide sufficient structural rigidity and dimensional stability.

[0022] Connector block 3 has a complex internal cavity and channel structure: Annular groove 6: Precision machined on the front side wall of connecting block 3, its cross-section is rectangular or trapezoidal, the inner surface of the groove is smooth (surface roughness Ra≤0.8μm), and a small amount of food-grade grease (such as lithium-based grease) is applied to reduce the frictional resistance when the sealing ring 4 slides. The bottom of the annular groove 6 is provided with drainage micro-holes (about 1mm in diameter) to prevent condensate or accidentally entered liquid from accumulating in the groove.

[0023] Irregularly shaped grooves 7: These are formed at both ends of the front sidewall of the connecting block 3. Each irregularly shaped groove 7 consists of a channel composed of a longitudinal rectangular groove and a transverse rectangular groove. The dimensions of the grooves are precisely calculated to match the diameter of the rotating column 8, the thickness of the sealing door 9, and the thickness of the miniature vacuum cleaner 13. The gap is controlled between 0.1 and 0.3 mm to ensure smooth movement while preventing dust intrusion due to excessive gaps. The inner corners of the irregularly shaped grooves 7 are rounded (R angle ≥ 2 mm) to reduce stress concentration and wear.

[0024] Rectangular groove 12: Located on the top surface of annular groove 6, used to fix the mounting bracket of electric actuator 11.

[0025] The mechanism also includes a sealing mechanism, which is disposed on the connecting block 3 and is used to form a complete physical isolation and seal for the charging head body 2 in the non-charging state. The sealing mechanism mainly includes: The sealing ring 4 is made of silicone rubber or hydrogenated nitrile rubber (HNBR) with excellent elasticity and aging resistance, and its Shore A hardness is controlled at 50±5 to ensure a tight fit with the charging head body 2. The outer contour of the sealing ring 4 precisely matches the annular groove 6 on the connecting block 3, using a clearance fit with a single-sided clearance of 0.2mm, allowing the sealing ring 4 to slide back and forth along the annular groove 6. The cavity 5 opened on the front side wall of the sealing ring 4 has a shape that is completely consistent with the outer contour of the charging head body 2, which is a negative replication. The inner wall of the cavity 5 is molded with an annular sealing lip. When the charging head body 2 is inserted into the cavity 5, this lip will produce a slight interference fit (interference amount of about 0.5~1mm), forming an effective radial seal. The depth of the cavity 5 is slightly greater than the length of the exposed part of the charging head body 2, ensuring that the front end face of the sealing ring 4 can be pushed to a position that is basically flush with the front end face of the charging head body 2.

[0026] The rear sidewall of the sealing ring 4 has a connector at its center that connects to the output end of the electric actuator 11. This connector is a metal insert (such as brass or stainless steel) that is molded into the body of the sealing ring 4 to provide reliable connection strength.

[0027] The sealing mechanism also includes two rotating columns 8, which are rotatably connected to the left and right ends of the front sidewall of the sealing ring 4 via miniature rolling bearings (e.g., MR series). The outer ring of the bearing is pressed into the bearing seat on the sealing ring 4, and the inner ring is interference-fitted with the rotating column 8. This design significantly reduces rotational friction, making the opening and closing of the sealing door 9 smoother and more reliable.

[0028] The sealing door 9 is fixedly installed on the outer surface of the rotating column 8. The shape of each sealing door 9 is adapted to the exposed surface of the front end of the charging head body 2, and is usually approximately semi-circular or fan-shaped. When the two doors are closed, they can completely cover the front end surface of the charging head body 2. The sealing door 9 is made of ABS engineering plastic, and a soft sealing gasket (such as foamed silicone) can be attached to the inner wall to form an end face seal with the front end surface of the charging head body 2 when closed.

[0029] A torsion spring (not shown) is also fitted onto each rotating column 8. One end of the torsion spring is fixed to the rotating column 8, and the other end is fixed in a specific groove in the sealing ring 4. The preload torque of the torsion spring is carefully designed to ensure that it provides sufficient torque to automatically rotate the sealing door 9 in the closing direction when it is not subjected to external force.

[0030] The movement of the sealing door 9 within the irregular groove 7 is a compound motion: when the sealing ring 4 moves back and forth, the rotating column 8 drives the sealing door 9 to slide in the longitudinal part of the irregular groove 7; when it moves to the transverse part of the irregular groove 7, under the action of the torsion spring, the sealing door 9 begins to rotate around the axis of the rotating column 8, thus opening and closing.

[0031] The enclosure also includes a drive assembly and a dust extraction assembly.

[0032] Through the above features, the charging head body 2 can be effectively locked. The specific working process is as follows: When the charging head body 2 is not in use, the sealing ring 4 extends forward from the annular groove 6 through the drive component. During the forward extension of the sealing ring 4, the two rotating columns 8 and the sealing door 9 move forward synchronously from the longitudinal part of the irregular groove 7. When the sealing ring 4 moves forward until its front end face is basically flush with the front end face of the charging head body 2, the two sealing doors 9, under the action of the rotation of the rotating column 8 and the torsion spring (not shown in the figure) pre-installed on the rotating column 8, rotate inward and close respectively, covering the front of the charging head body 2 like two doors, thereby locking and sealing its front end face and terminals, effectively preventing the intrusion of dust and moisture.

[0033] The drive assembly includes an electric actuator 11, which is mounted on the connecting block 3. The electric actuator 11 is a miniature DC electric actuator with a working voltage of DC24V (compatible with the charging pile control system). Its stroke is determined based on the required movement distance of the sealing ring 4. The electric actuator 11 integrates a DC motor, a reduction gearbox, and a lead screw and nut mechanism, converting the motor's rotational motion into the linear motion of the actuator. The actuator housing is made of aluminum alloy, making it lightweight and providing good heat dissipation. A rectangular groove 12 is formed on the top surface of the annular groove 6 on the front sidewall of the connecting block 3. The electric actuator 11 is fixedly mounted in the rectangular groove 12 of the connecting block 3 using a custom-made stainless steel mounting bracket. The mounting bracket is connected to the threaded holes on the inner wall of the rectangular groove 12 using screws. The output end of the electric actuator 11 is connected to the connector on the rear sidewall of the sealing ring 4 via a universal joint connector. The universal joint design compensates for minor alignment errors and prevents jamming.

[0034] It is worth mentioning that the movement of the electric actuator 11 is controlled by an integrated control system. This system includes: Main controller: This is typically the main control board of the charging pile or a separate microcontroller unit (MCU), such as a chip based on the ARM Cortex-M core. The MCU is responsible for receiving trigger signals and issuing control commands.

[0035] Position sensor: Inside the connecting block 3, near the extreme positions (fully extended and fully retracted) of the annular groove 6, a miniature Hall sensor or photoelectric sensor is installed to detect the position of the sealing ring 4 and feed back a status signal to the MCU to achieve closed-loop control.

[0036] Trigger signal source: The trigger signal can come from multiple channels: Buttons on the human-machine interface (HMI) of the charging station.

[0037] The command is automatically issued after the vehicle and the charging station complete the communication handshake.

[0038] A proximity switch located on the charging gun holder is automatically triggered when the charging gun is detected being returned.

[0039] Remote control commands received via wireless communication modules (such as 4G / 5G, Bluetooth, Wi-Fi).

[0040] Drive circuit: The MCU controls the forward and reverse rotation of the DC motor inside the electric push rod 11 through an H-bridge motor driver chip (such as DRV8833), thereby realizing the extension and retraction of the push rod. The drive circuit has overcurrent protection and overheat protection functions.

[0041] The control logic flow is as follows: Lockout process (non-charging state): The system detects that charging is complete and the charging gun has been removed from the vehicle and put back (or a manual locking command has been received).

[0042] The MCU sends an extension command to the electric actuator 11. The electric actuator 11 pushes the sealing ring 4 to slide forward along the annular groove 6. Simultaneously, the sealing door 9 moves forward with the rotating column 8 in the longitudinal portion of the irregular groove 7. When the sealing ring 4 approaches its front limit position, the sealing door 9 enters the transverse portion of the irregular groove 7 and begins to rotate inward under the action of the torsion spring. The two sealing doors 9 rotate to the closed position and lock together by the magnet 10.

[0043] The position sensor detects that the sealing ring 4 has reached the front limit position and sends a feedback signal to the MCU, which then stops supplying power to the electric push rod 11.

[0044] At the same time, the MCU can trigger the vacuuming component to work.

[0045] Unlocking process (preparing to charge): The system receives a charging request or a manual unlock command.

[0046] The MCU first sends a retraction command to the electric actuator 11.

[0047] The initial retraction force of the electric push rod 11 overcomes the attraction force of the magnet 10 and the torque of the torsion spring, causing the two sealing doors 9 to rotate outward and open. As the electric push rod 11 continues to retract, the sealing ring 4, along with the opened sealing doors 9, retracts along the annular groove 6 and the irregular groove 7. When the sealing ring 4 reaches its limit position, the charging head body 2 is fully exposed, allowing for the insertion of the cleaning gun. The position sensor provides a feedback signal, and the MCU stops the electric push rod 11. The vacuuming assembly can initiate cleaning during or after the unlocking process.

[0048] Through the above features, automatic control of the sealing mechanism is achieved. Specifically, when a user needs to charge, they can operate a button on the charging pile or vehicle to generate an electrical signal sent to the control unit of the electric push rod 11. This causes the electric push rod 11 to start working, retracting its output end, thereby driving the sealing ring 4, the two rotating columns 8, and the sealing door 9 to synchronously retract into the annular groove 6 and the irregular groove 7, thus releasing the lock on the charging head body 2. At this time, the charging gun can be inserted for charging. Conversely, when the user finishes using the device and removes the charging gun, the system will generate another electrical signal to the electric push rod 11, causing it to start and push the sealing ring 4 and the two sealing doors 9 forward and close, thereby sealing the charging head body 2.

[0049] The vacuuming assembly is integrated into a closed mechanism to actively clean the charging head body 2, further improving the protection level and charging safety. The vacuuming assembly includes two mini vacuum cleaners 13, which are fixedly mounted on the front side walls of two sealing doors 9 by screws. Each of the front side walls of the two sealing doors 9 has a mounting groove 14. The vacuuming assembly also includes two vacuum hoods 15, which are fixedly mounted in the two mounting grooves 14 by clips or screws. The mini vacuum cleaners 13 communicate with the internal cavity of the vacuum hoods 15 via built-in or external flexible hoses.

[0050] It is worth mentioning that this mini vacuum cleaner 13 is essentially a miniature negative pressure generating device, the core of which includes: Miniature brushless DC motors: small size, high speed, and low power consumption.

[0051] Centrifugal fan impeller: Made of POM or nylon material, dynamically balanced, ensuring smooth operation and low noise.

[0052] Dust collection box: Removable design, made of transparent PC material for easy observation of dust accumulation. The dust collection box contains a primary filter (stainless steel mesh) and a high-efficiency particulate air (HEPA) filter to ensure clean exhaust air.

[0053] Circuit board: integrates motor drive and speed control functions.

[0054] The power cord and control cord of the mini vacuum cleaner 13 are connected to the main control board inside the connecting block 3 via flexible ribbon cables along the pre-set wire grooves inside the sealing door 9 and the rotating column 8. The connection between the rotating column 8 and the sealing ring 4 adopts a miniature slip ring (e.g., a cap-type slip ring) structure to ensure that the wires do not get tangled during rotation.

[0055] Through the aforementioned features, active cleaning of the charging head body 2 is achieved. Simultaneously, the mini vacuum cleaner 13 starts up when the electric push rod 11 is activated to unfold the sealing mechanism (i.e., to prepare to seal the charging head). When the mini vacuum cleaner 13 is working, a negative pressure is generated at the suction port of the dust hood 15, drawing dust particles, as well as small amounts of moisture or water stains, that may be adhering to the surface of the charging head body 2 and the gaps between the terminals into the dust collection box of the mini vacuum cleaner 13 through the mounting slot 14 and the hose. This cleans the charging head before sealing, further enhancing the protective effect and charging safety.

[0056] The operation of the vacuuming component and the movement of the sealing mechanism can be controlled in conjunction with each other, or independently. A typical example of coordinated control logic is as follows: As the locking process is about to be completed: before the sealing door 9 closes, the MCU starts the miniature vacuum cleaner 13 to perform a powerful suction cleaning on the last exposed surface of the charging head body 2 for several seconds to remove the attached dust.

[0057] At the start or after the unlocking process: the moment the sealed door 9 is opened and the charging head body 2 is exposed, the MCU activates the miniature vacuum cleaner 13 to perform a brief cleaning, blowing away or sucking away any floating dust that may be attached to the new environment.

[0058] The MCU can adjust the speed of the miniature vacuum cleaner 13 motor via a PWM (Pulse Width Modulation) signal, thereby adjusting the suction power as needed. For example, standard suction power is used during routine maintenance, and suction power is automatically increased when a high concentration of ambient dust is detected (via an optional external dust sensor).

[0059] To achieve a tight lock when the two sealing doors 9 are closed, multiple high-performance neodymium iron boron (NdFeB) permanent magnets, grade N35 or higher, are embedded and installed on the side wall edge of one sealing door 9 (e.g., the left door) facing the other sealing door 9. The magnets 10 are cylindrical and are firmly fixed with epoxy resin adhesive.

[0060] The corresponding side wall of the other sealed door 9 (right-side door) is inlaid with a magnetic plate made of low-carbon steel or 430 stainless steel. The size and position of the magnetic plate correspond precisely to the array of magnets 10 on the opposite side.

[0061] When the two sealed doors 9 are rotated to a near-closed position, the magnetic field generated by the magnet 10 interacts with the magnetic conductive sheet, producing a strong attraction force (the attraction force of a single magnet 10 can reach more than 2N), causing the two sealed doors 9 to fit tightly together. This magnetic adsorption locking method does not require complex mechanical latches, has a simple structure, reliable operation, and can compensate for minor manufacturing tolerances and deformations.

[0062] Example 2, Manual Driver Version: In cost-sensitive applications or where full automation is not required, the electric actuator 11 and its control system can be omitted. Instead, a manual lever or slider mechanism can be installed on the connecting block 3 or the gun housing 1. The user manually operates this lever, transmitting the manually input force to the sealing ring 4 via a linkage, gear, or wire rope mechanism, driving its back-and-forth movement and opening and closing the sealing door 9. For example, the lever pushes the sealing ring 4 through a cam mechanism, with the cam profile designed to achieve a combined "push-rotate" motion. The magnet 10 is still retained to ensure locking after closure.

[0063] Example 3, pneumatic or hydraulic drive version: In specific industrial or commercial applications with centralized air or hydraulic power sources, the drive assembly can be replaced with a small pneumatic or hydraulic cylinder. The pneumatic / hydraulic cylinder is fixed within the connecting block 3, and its piston rod is connected to the sealing ring 4. The inflow and outflow of compressed air or hydraulic oil are controlled by a solenoid valve, driving the piston rod to extend and retract, thereby actuating the closing mechanism. Pneumatic / hydraulic drives offer advantages such as high thrust, fast response, and explosion-proof properties.

[0064] Example 4, Variation of the cleaning component: Air cleaning: In addition to or as an alternative to suction cleaning, a miniature air pump and nozzle can be integrated into the sealing door 9 to perform air cleaning on the charging head body 2 before locking, blowing away dust.

[0065] Contact cleaning: Soft brushes or scrapers are installed on the inner wall of the sealed door 9 or the edge of the dust cover 15, and the surface of the charging head body 2 is brushed by physical contact during the closing or opening of the sealed door 9.

[0066] Electrostatic adsorption: A miniature high-voltage electrostatic generator is installed near the dust hood 15 to charge the dust, making it easier to be adsorbed.

[0067] Ultraviolet disinfection: A low-power UV-C LED is integrated into the sealed cavity to irradiate the surface of the charging head body 2 with ultraviolet light during the locking period, which plays a role in sterilization and disinfection.

[0068] Example 5: Sensor Integration and Intelligent Management Humidity sensor: A humidity sensor is integrated into the sealed cavity. If the humidity inside the cavity is detected to be too high, the MCU can control the start of the electric push rod 11 and the mini vacuum cleaner 13 to perform multiple "breathing" actions (quickly opening and closing several times), and may trigger the heating element (such as a PTC heating element) to gently dry the cavity before completely closing it.

[0069] Camera and Image Recognition: A miniature camera is integrated on the sealed door 9 to take pictures of the charging head body 2 terminals. The image recognition algorithm determines the degree of contamination and wear, and decides the cleaning intensity or sends a maintenance alarm to the operation and maintenance center.

[0070] Wireless communication and cloud platform: The charging gun's operating status (such as number of lockouts, cleaning cycle, and fault codes) is uploaded to the cloud platform via a wireless module to enable predictive maintenance and remote management.

[0071] Working principle: In use, when the charging pile is in standby mode or the charging gun is not in use, the sealing mechanism is in the extended and locked position. That is, the output rod of the electric push rod 11 extends, pushing the sealing ring 4 and the sealing door 9 forward along the annular groove 6 and the irregular groove 7. Then, the two sealing doors 9 rotate and close under the action of the torsion spring, and are locked together by the attraction of the magnet 10, completely enclosing the charging head body 2 in the sealed space formed by the sealing ring 4 and the sealing door 9, achieving dustproof and waterproof.

[0072] When charging is required, the user triggers a signal. Upon receiving the signal, the electric push rod 11 retracts, first overcoming the attraction of the magnet 10 and the torque of the torsion spring, causing the two sealing doors 9 to rotate outward and open. Then, it pulls the sealing ring 4, causing the opened sealing doors 9 to retract into the annular groove 6 and irregular groove 7 of the connecting block 3, exposing the charging head body 2. At this point, the charging gun can be inserted. During this process, the vacuuming component can be selectively activated to clean the exposed charging head body 2.

[0073] After charging is complete, the user removes the charging gun and returns it to its original position. The system detects that the charging gun has been returned and triggers the electric push rod 11 to extend again, pushing the sealing mechanism to repeat the above extension and closing actions, locking and sealing the charging head body 2 again. At the same time, the vacuuming component can be restarted for cleaning, preparing for the next use.

[0074] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dustproof and waterproof mechanical locking mechanism for charging station gun heads, characterized in that: include: Gun body shell (1), charging head body (2) is provided on the front side wall of the gun body shell (1), and a connecting block (3) is fixedly installed at the connection between the gun body shell (1) and the charging head body (2). The closing mechanism is mounted on the connecting block (3) and includes: A sealing ring (4) is provided on the connecting block (3). A cavity (5) is provided on the front side wall of the sealing ring (4). The size of the cavity (5) is the same as the size of the charging head body (2). An annular groove (6) is provided on the front side wall of the connecting block (3).

2. The dustproof and waterproof mechanical locking mechanism for charging pile gun heads according to claim 1, characterized in that: The closed mechanism also includes: Two rotating columns (8) are provided, which are rotatably connected to the two ends of the front side wall of the sealing ring (4). The outer surfaces of the two rotating columns (8) are fixedly installed with sealing doors (9). The two ends of the front side wall of the connecting block (3) are provided with irregular grooves (7). The irregular grooves (7) are composed of two rectangular grooves. The sealing mechanism also includes a drive assembly and a dust collection assembly.

3. The dustproof and waterproof mechanical locking mechanism for the charging pile gun head according to claim 2, characterized in that: The driver components include: Electric actuator (11) is installed in connecting block (3). The front side wall of connecting block (3) is provided with a rectangular groove (12) on the top surface of the annular groove (6). Electric actuator (11) is fixedly installed in the inner wall of the rectangular groove (12). The output end of electric actuator (11) is connected to the rear side wall of sealing ring (4).

4. The dustproof and waterproof mechanical locking mechanism for the charging pile gun head according to claim 3, characterized in that: The vacuuming components include: Miniature vacuum cleaner (13) There are two miniature vacuum cleaners (13), which are fixedly installed on the front side wall of the sealing door (9). The front side wall of the two sealing doors (9) is provided with mounting grooves (14).

5. The dustproof and waterproof mechanical locking mechanism for the charging station gun head according to claim 4, characterized in that: The vacuuming components also include: There are two vacuum hoods (15), which are fixedly installed in two mounting slots (14) respectively. The mini vacuum cleaner (13) is connected to the inside of the vacuum hood (15) through a hose.

6. The dustproof and waterproof mechanical locking mechanism for the charging pile gun head according to claim 2, characterized in that: One of the sealed doors (9) has multiple magnets (10) fixedly installed on the side wall facing the other sealed door (9), and the side wall of the other sealed door (9) is made of a material that can be attracted by the magnets (10).

7. The dustproof and waterproof mechanical locking mechanism for charging pile gun heads according to claim 2, characterized in that: The sealing ring (4) slides in the annular groove (6), and the sealing door (9) slides in the irregular groove (7).

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