Rainproof interface structure of charging pile

Abstract

The utility model provides a rain -proof interface structure of charging pile belongs to charging pile technical field, rain -proof interface structure of charging pile is used for protecting charging interface from rain water invasion, including protection shell, seal ring, deflector plate and lock mechanism, the protection shell is hollow cavity structure, the top of protection shell is provided with arc deflector inclined plane, the inclination angle of deflector inclined plane is outwardly downward, seal ring is embedded in the inner circumferential wall of protection shell, the inside diameter of seal ring is less than the outside diameter of charging interface, the deflector plate fixed connection is established on the outer surface of protection shell, and the lower end edge of deflector plate and the outer surface of protection shell form the drainage channel of downward opening, the utility model can solve the technical problem that charging pile interface in prior art is easily subjected to rain water invasion under the outdoor use environment and leads to the inside electrical element of interface damp short circuit or corrosion.

Description

Technical Field

[0001] This utility model belongs to the field of charging pile technology, specifically, it relates to a rainproof interface structure for a charging pile. Background Technology

[0002] With the rapid popularization of new energy vehicles, charging piles, as important supporting infrastructure, are being built in large numbers in outdoor locations such as urban streets, parking lots, and highway service areas. These charging piles need to be exposed to the natural environment for a long time, enduring various climatic conditions such as sun, rain, and wind. Among these, rainwater intrusion is one of the main factors affecting the safety and lifespan of charging piles. The charging interface, as a key part of power transmission, contains multiple live contacts and electrical connection structures. Once rainwater enters the interface, it can cause a series of problems such as short circuits between contacts, corrosion of electrical components, and decreased insulation performance. In severe cases, it can even lead to safety accidents such as leakage and fire. Current technology usually uses rubber sealing rings or silicone sealing gaskets to waterproof the charging interface. This sealing method relies on the sealant and the interface shell... The clamping force between the plugs prevents rainwater from seeping in. However, in actual use, the frequent plugging and unplugging of the charging plug can cause the sealing material to wear and age, leading to a gradual decrease in sealing performance. Some charging piles use a flip-up waterproof cover structure to cover the interface and prevent rainwater from entering when not in use. However, this structure requires the cover to be opened during charging, at which point the interface is completely exposed to rainwater and loses its protective function. Some products improve waterproof performance by increasing the protection level of the interface, such as by using a deeper plug design or increasing the number of sealing layers. However, these methods either increase the inconvenience for users or significantly increase the manufacturing cost, and the protective effect is still limited. Especially under extreme weather conditions such as strong winds and heavy rain, rainwater will impact the interface area from all angles, and the existing passive sealing protection is difficult to cope with the complex and ever-changing rainwater intrusion paths. Utility Model Content

[0003] In view of this, the present invention provides a rainproof interface structure for charging piles, which can solve the technical problem in the prior art that the charging pile interface is easily affected by rainwater intrusion in outdoor use environment, resulting in moisture damage, short circuit or corrosion of the internal electrical components of the interface.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a rainproof interface structure for a charging pile, which protects the charging interface from rainwater intrusion. It includes a protective shell, a sealing ring, a guide plate, and a locking mechanism. The protective shell has a hollow cavity structure, and its top is provided with an arc-shaped guide slope with an outward and downward inclination angle. The sealing ring is embedded in the inner circumferential wall of the protective shell, and its inner diameter is smaller than the outer diameter of the charging interface. The guide plate is fixedly connected to the outer surface of the protective shell, and its lower edge forms a downward-opening drainage channel with the outer surface of the protective shell. The locking mechanism is located on the side wall of the protective shell and is used to achieve a detachable connection between the protective shell and the charging pile body.

[0006] The technical advantages of the rainproof interface structure for a charging pile provided by this utility model are as follows: By setting an arc-shaped outwardly inclined guide slope on the top of the protective shell, rainwater can flow quickly outward along the guide slope when it comes into contact with the protective shell, and will not accumulate at the interface. The sealing ring is embedded in the inner circumferential wall of the protective shell and its inner diameter is smaller than the outer diameter of the charging interface, so that a tight contact is formed when the charging plug is inserted to prevent rainwater from seeping in along the interface gap. The guide plate is fixed on the outer surface of the protective shell and forms a downward-opening drainage channel between its lower edge and the shell surface, so that the rainwater flowing through the guide slope can be quickly discharged through the drainage channel and will not flow back to the interface position. The locking mechanism realizes the detachable connection between the protective shell and the charging pile body for easy maintenance and replacement. The overall structure effectively prevents rainwater from entering the charging interface through a multi-layer protection mechanism.

[0007] Based on the above technical solution, the rainproof interface structure of the charging pile of this utility model can be further improved as follows:

[0008] The highest point of the flow guiding slope is located directly above the geometric center of the protective housing, and the flow guiding slope extends radially outward to the edge of the protective housing.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the highest point of the guide slope directly above the geometric center of the protective shell and extending the guide slope radially outward to the edge of the protective shell, a full-range inclined surface with the center as the vertex is formed. This ensures that rainwater can be guided to the outside by the guide slope no matter which direction it falls from, avoiding the formation of convergence points or stagnant areas on the surface of the protective shell. It also ensures that rainwater flows away from the protective shell quickly along the shortest path under the action of gravity, further improving the reliability and comprehensiveness of the rainproof performance.

[0010] Furthermore, the sealing ring is an annular protrusion structure, the sealing ring is continuously distributed along the inner circumferential wall of the protective shell, and the cross-section of the sealing ring is triangular or trapezoidal.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the sealing ring as a continuous annular protrusion structure along the inner circumference of the protective shell with a triangular or trapezoidal cross-section, the sealing ring can form a linear or narrow surface contact with the outer surface of the plug when the charging plug is inserted, thereby generating a larger unit area pressure. This concentrated pressure distribution makes the sealing ring more likely to undergo elastic deformation to adapt to the slight unevenness of the plug surface. At the same time, the continuously distributed annular structure eliminates sealing discontinuities and prevents rainwater from seeping in from local gaps. The triangular or trapezoidal cross-section can expand evenly to both sides when under pressure, providing a more stable and durable sealing effect.

[0012] Furthermore, the guide plate is an outwardly extending plate-like structure, and the extension direction of the guide plate is perpendicular to the axis of the protective shell, with the outer edge of the guide plate being lower than the inner edge.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the deflector as an outward-extending plate-like structure with the extension direction perpendicular to the axis of the protective shell, the deflector can form a roof-like shielding structure around the protective shell to intercept rainwater and guide it to a position away from the interface. The inclined setting of the outer edge of the deflector being lower than the inner edge causes rainwater to accelerate outward flow when it flows over the surface of the deflector due to the combined effect of gravity and the inclined surface, preventing rainwater from stagnating on the surface of the deflector or flowing back to the area near the interface. At the same time, the plate-like structure has sufficient mechanical strength to withstand the impact of rainwater and the action of wind without deformation or failure.

[0014] Furthermore, the width of the drainage channel gradually increases from top to bottom in the vertical direction, with the upper end of the drainage channel having a width of 3mm to 5mm and the lower end having a width of 8mm to 12mm.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the width of the drainage channel gradually increase from top to bottom in the vertical direction, with the upper width being 3mm~5mm and the lower width being 8mm~12mm, a funnel-like guiding space is formed. This allows rainwater collected from the guide slope and guide plate to slow down and be discharged in an orderly manner in the gradually expanding space after entering the drainage channel, without causing rainwater blockage and backflow due to the narrow channel. The narrower upper design ensures a tight fit between the drainage channel inlet and the surface of the protective shell, reducing the risk of rainwater seeping in from gaps. The wider lower design provides sufficient drainage space to ensure that even in the case of heavy rain or other high flow conditions, the accumulated water can be drained in time.

[0016] Furthermore, the locking mechanism includes a buckle part and a slot part. The buckle part is disposed on the outer side wall of the protective housing, and the slot part is disposed on the charging pile body. The buckle part and the slot part are connected by an elastic snap-fit ​​method.

[0017] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by designing the locking mechanism as an elastic snap-fit ​​structure including a snap-fit ​​part and a slot part, the connection between the protective shell and the charging pile body can not only ensure sufficient fixing strength to prevent loosening and falling off due to vibration or external force during use, but also allow for quick disassembly by applying appropriate external force to release the snap-fit ​​part from the slot part when maintenance or replacement is required. The elastic snap-fit ​​method eliminates the need for additional fasteners such as bolts, simplifying the structure and reducing manufacturing costs. At the same time, the matching design of the snap-fit ​​part and the slot part can provide clear positioning feedback during assembly to ensure the accuracy and reliability of installation.

[0018] Furthermore, the latching part is an outwardly protruding elastic hook-shaped structure, with the hook end of the latching part facing the bottom of the protective housing, and the thickness of the latching part gradually decreasing from the root to the hook end.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by designing the buckle part as an outwardly protruding elastic hook-shaped structure with the hook end facing the bottom of the protective shell and the thickness gradually decreasing from the root to the hook end, the buckle part can bend and retract inward under the action of external force when inserted into the slot part, so as to smoothly pass over the blocking edge of the slot part. When the buckle part is fully inserted into the slot part, its elastic restoring force causes the hook end to pop out and lock in the locking position of the slot part to form a reliable mechanical lock. The design of the hook end facing the bottom ensures that the upward pulling force will not cause the buckle to fall out during normal use. The design of gradually decreasing thickness gives the hook end part greater elastic deformation ability, which facilitates insertion and removal operations, while the thicker area at the root provides sufficient strength to support the entire buckle structure.

[0020] Furthermore, the bottom of the inner cavity of the protective shell is provided with an inwardly recessed buffer groove, the depth of which is 2mm to 4mm and the cross-section of which is arc-shaped.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting an inwardly recessed buffer groove with a depth of 2mm~4mm and an arc-shaped cross-section at the bottom of the inner cavity of the protective shell, a collection space is provided for the possible seepage of trace amounts of rainwater or condensate, preventing water from directly contacting the electrical parts of the charging interface. The arc-shaped cross-section of the buffer groove allows water to adhere to the groove wall under the action of surface tension without easily overflowing or splashing. At the same time, the arc-shaped structure facilitates the gradual evaporation or discharge of water under the action of gravity and airflow. The depth of 2mm~4mm can accommodate enough water without affecting the overall strength and structural compactness of the protective shell due to excessive space, providing a final safety guarantee for the entire rainproof system.

[0022] Furthermore, the sealing ring and the protective housing form an interference fit connection, and the material hardness of the sealing ring is lower than that of the protective housing.

[0023] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by forming an interference fit connection between the sealing ring and the protective shell and selecting a sealing ring material with a lower hardness than the protective shell, a certain pressure needs to be applied during assembly to embed the sealing ring into the inner circumferential wall of the protective shell. Thus, after assembly, the sealing ring is subjected to radial clamping force from the shell. This pre-clamping state ensures that the sealing ring always maintains close contact with the inner wall of the shell and will not loosen or fall off due to long-term use or temperature changes. The sealing ring with lower material hardness can undergo greater elastic deformation when squeezed by the charging plug to fully fill the tiny gap between the plug and the shell. At the same time, the harder protective shell provides a stable support structure to ensure the long-term stability of the overall protective performance.

[0024] Furthermore, the lower surface of the guide plate is provided with multiple parallel reinforcing ribs, which extend along the radial direction of the guide plate, and the spacing between two adjacent reinforcing ribs is 10mm~15mm.

[0025] The beneficial effects of the above-mentioned improvement scheme are as follows: by setting multiple parallel reinforcing ribs extending radially on the lower surface of the deflector and keeping the spacing between adjacent reinforcing ribs 10mm~15mm, the bending strength and overall rigidity of the deflector are significantly improved, preventing the deflector from bending or fluttering upward when subjected to rainwater impact or wind load. The radial extension of the reinforcing ribs is consistent with the main flow direction of rainwater and will not obstruct the water flow. Instead, it can guide the rainwater to flow quickly along a specific path to the outer edge of the deflector. The spacing of 10mm~15mm ensures the structural strength while avoiding the reinforcing ribs being too dense, which would increase the amount of material used and the manufacturing difficulty. At the same time, the groove space formed between the reinforcing ribs can temporarily accommodate rainwater with a large instantaneous flow rate and play a buffering role.

[0026] Compared with existing technologies, the beneficial effects of the rainproof interface structure for charging piles provided by this utility model are as follows: This utility model fundamentally solves the problem of rainwater intrusion into the charging pile interface by designing a multi-layer protection system including a protective shell, a guide plate, a sealing ring, and a locking mechanism. The arc-shaped guide slope on the top of the protective shell, together with the outwardly extending guide plate, forms an active rainwater guiding mechanism, which guides rainwater to a safe area before it comes into contact with the interface. The sealing ring embedded in the inner circumferential wall of the protective shell forms a ring seal on the charging plug to prevent rainwater from seeping in along the interface gaps. The drainage channel formed between the guide plate and the outer surface of the protective shell ensures that the collected rainwater can be quickly drained away. The drainage system prevents water from accumulating near the interface, and the locking mechanism ensures the stability and reliability of the entire protective structure under various usage conditions. Compared with existing technologies, this invention not only achieves effective protection in terms of static sealing through the sealing ring and shell structure, but more importantly, it reduces the amount of rainwater at the interface from the source through the active drainage design of the guide slope and guide plate. At the same time, the design of the drainage channel being narrow at the top and wide at the bottom, and the setting of the buffer groove, provide collection and evaporation space for any trace amounts of water that may seep in. The overall solution achieves comprehensive and three-dimensional rain protection while ensuring the convenience of charging functions, significantly improving the safety of charging piles in harsh outdoor weather conditions and extending the service life of the equipment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A cross-sectional view of a rainproof interface structure for a charging pile;

[0029] Figure 2 A front view of a rainproof interface structure for a charging pile;

[0030] Figure 3 A top view of a rainproof interface structure for a charging pile;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Protective housing; 20. Sealing ring; 30. Guide plate; 40. Locking mechanism; 41. Buckle part; 42. Slot part; 50. Drainage channel; 60. Buffer groove. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The diagram shows an embodiment of a rainproof interface structure for a charging pile provided by this utility model. In this embodiment, it is used to protect the charging interface from rainwater intrusion and includes a protective shell 10, a sealing ring 20, a guide plate 30, and a locking mechanism 40. The protective shell has a hollow cavity structure, and an arc-shaped guide slope is provided on the top of the protective shell. The inclination angle of the guide slope is outward and downward. The sealing ring 20 is embedded in the inner circumferential wall of the protective shell, and the inner diameter of the sealing ring 20 is smaller than the outer diameter of the charging interface. The guide plate is fixedly connected to the outer surface of the protective shell, and a downward-opening drainage channel is formed between the lower edge of the guide plate and the outer surface of the protective shell. The locking mechanism is provided on the side wall of the protective shell and is used to realize the detachable connection between the protective shell and the charging pile body.

[0035] In the above technical solution, the highest point of the guide slope is located directly above the geometric center of the protective shell, and the guide slope extends radially outward to the edge of the protective shell.

[0036] Furthermore, in the above technical solution, the sealing ring is an annular protrusion structure, and the sealing ring is continuously distributed along the inner circumferential wall of the protective shell. The cross-section of the sealing ring is triangular or trapezoidal.

[0037] Furthermore, in the above technical solution, the guide plate is an outwardly extending plate-like structure, the extension direction of the guide plate is perpendicular to the axis of the protective shell, and the outer edge of the guide plate is lower than the inner edge.

[0038] Furthermore, in the above technical solution, the width of the drainage channel 50 gradually increases from top to bottom in the vertical direction, with the upper end width being 3mm~5mm and the lower end width being 8mm~12mm.

[0039] Furthermore, in the above technical solution, the locking mechanism includes a buckle part 41 and a slot part 42. The buckle part is disposed on the outer side wall of the protective shell, and the slot part is disposed on the charging pile body. The buckle part and the slot part are connected by an elastic snap-fit ​​method.

[0040] Furthermore, in the above technical solution, the latching part is an outwardly protruding elastic hook-shaped structure, with the hook end of the latching part facing the bottom of the protective shell, and the thickness of the latching part gradually decreasing from the root to the hook end.

[0041] Furthermore, in the above technical solution, the bottom of the inner cavity of the protective shell is provided with an inwardly recessed buffer groove, the depth of which is 2mm~4mm, and the cross-section of the buffer groove 60 is arc-shaped.

[0042] Furthermore, in the above technical solution, an interference fit connection is formed between the sealing ring and the protective shell, and the material hardness of the sealing ring is lower than that of the protective shell.

[0043] Furthermore, in the above technical solution, the lower surface of the guide plate is provided with multiple parallel reinforcing ribs, which extend along the radial direction of the guide plate, and the spacing between two adjacent reinforcing ribs is 10mm~15mm.

[0044] Before the charging pile leaves the factory, the protective shell is fixedly installed at the interface position of the charging pile body using a locking mechanism. During installation, first align the protective shell with the charging interface, ensuring the inner cavity of the protective shell is concentric with the charging interface. Then, push the protective shell towards the charging pile body, gradually bringing the latching part of the locking mechanism closer to the slot on the charging pile body. Continue applying force, causing the hook-shaped structure of the latching part to elastically contract inward after being subjected to force, passing over the blocking edge of the slot. When the latching part is fully inserted into the slot, release the pushing force. At this time, the latching part will rely on its own elasticity to return to its original shape, and the hook end will engage with the locking position of the slot, producing a crisp locking sound, indicating that the installation is in place. After installation, check whether the sealing ring is evenly distributed on the inner circumferential wall of the protective shell and whether there is any damage or detachment. Confirm that the drainage channel between the guide plate and the outer surface of the protective shell is unobstructed and free of debris. After the charging pile is put into use, when users need to charge their vehicles, hold the charging plug and align it with the opening position of the protective shell, pushing the plug into the inner cavity of the protective shell along the axial direction. During the pushing process, the plug first contacts the sealing ring. At this time, appropriate insertion force needs to be applied to overcome the seal. The elastic resistance of the ring causes the sealing ring to undergo radial and axial elastic deformation as the plug is inserted further, tightly fitting against the outer surface of the plug to form a ring seal. After the plug is fully inserted, a reliable connection is established with the electrical contacts of the charging interface, and the charging process begins. Throughout the charging process, regardless of light, moderate, or heavy rain, rainwater falls on the guide slope and flows outward along the arc-shaped surface. After reaching the guide plate, it is guided to the drainage channel and quickly drained away from the interface area. The sealing ring maintains close contact with the outer surface of the plug, preventing any rainwater from seeping into the interior through the interface gaps. When the user unplugs the plug after charging is complete, the sealing ring returns to its original shape due to its own elasticity, ready for the next use. In daily maintenance, regularly check the surface of the guide slope and guide plate for dust, dirt, or other attachments that may affect drainage. If necessary, rinse with clean water or wipe with a soft cloth to keep the surface clean and smooth. Check the sealing ring for signs of aging and cracking. If a decrease in sealing performance is found, remove the protective shell by releasing the locking mechanism, replace the sealing ring, and reinstall it. Check the buffer groove for water or debris. If necessary, clean it to ensure the normal function of the buffer groove.

[0045] The following is a specific embodiment 1 of this utility model: In this embodiment, the protective shell is made of polycarbonate material through injection molding. Polycarbonate has excellent mechanical strength, weather resistance, and insulation properties, making it suitable for long-term use in outdoor environments. The protective shell has an overall cylindrical structure with an outer diameter of 95mm, an inner diameter of 78mm, and a wall thickness of 8mm. The guide slope at the top of the protective shell slopes from the highest point of the geometric center towards the outer edge, with a height difference of 12mm between the highest point and the edge. The guide slope has a smooth parabolic curved shape, and the surface roughness is controlled below 0.8um to reduce rainwater flow resistance. The sealing ring is made of silicone rubber material with a Shore hardness of 50~60°, and the outer diameter of the sealing ring is 7mm. The 6mm diameter forms a 1mm interference fit with the inner diameter of the protective housing. The inner diameter of the sealing ring is 68mm, while the outer diameter of the standard charging plug is 70mm, ensuring that the sealing ring can generate sufficient radial clamping force when the plug is inserted. The axial height of the sealing ring is 15mm, and its cross-section is an isosceles triangle with a base width of 4mm and a height of 3mm. The vertex of the triangle faces the center of the inner cavity of the protective housing. When the charging plug is inserted, it first contacts the vertex of the triangle, and then the sealing ring deforms evenly to both sides as the insertion depth increases. The guide plate is made of the same polycarbonate material as the protective housing and is fixedly connected to the outer surface of the protective housing by ultrasonic welding at a position 8mm away from the edge of the top guide slope. The guide plate is circular. The annular, horizontally extending outwards has a width of 25mm and a thickness of 3mm. The outer edge of the guide plate slopes downwards at a 5-degree angle relative to the inner edge, forming a gently sloping drainage surface. Eight reinforcing ribs are provided on the lower surface of the guide plate. Each rib extends radially from the inner edge to the outer edge, with a height of 2mm, a width of 1.5mm, and a rectangular cross-section. The circumferential spacing between adjacent reinforcing ribs is 12mm. The drainage channel is formed by the gap between the lower edge of the guide plate and the outer surface of the protective shell. The upper inlet width is 4mm, and the lower outlet width is 10mm, forming a downwardly expanding conical space. The locking mechanism has three latches located on the outer wall of the protective shell near the bottom. The components are evenly distributed at 120° intervals along the circumference. Each latch protrudes 8mm from the outer wall of the protective shell, with a base thickness of 2.5mm and a hook end thickness of 1mm, forming a gradually transitioning structure. The hook end of the latch bends downward to form a hook angle with a depth of 1.5mm, used to engage with the corresponding slot on the charging pile body. The buffer groove is located at the center of the bottom of the inner cavity of the protective shell, forming a circular pit with a diameter of 20mm and a depth of 3mm. The cross-section of the buffer groove is a semi-circular arc with a radius of curvature of 10mm, and the groove wall has a smooth transition to facilitate moisture adhesion and evaporation. The contact pressure between the sealing ring and the outer surface of the plug is 0.3~0.5 mm per square centimeter when the standard charging plug is inserted.The 5 Newton pressure ensures effective sealing without causing difficulty in insertion or removal due to excessive pressure. The protective structure of this embodiment is suitable for both standard AC and DC charging interfaces. By adjusting the dimensions of the protective shell and sealing ring, it can match different specifications of charging interfaces. In actual use, under moderate rain conditions with a rainfall intensity of 50mm per hour, the average residence time of rainwater after falling on the guide slope is no more than 0.5 seconds before flowing along the slope to the guide plate. The flow velocity of rainwater on the surface of the guide plate is approximately 15cm per second, and the drainage efficiency reaches 80ml per second. The sealing ring formed after the charging plug is inserted can withstand a hydrostatic pressure of 0.8 Newtons per square centimeter, equivalent to the pressure of water at a depth of 8 meters. The force far exceeds the water pressure that actual rainfall might generate. The overall protection structure achieves an IP67 standard, meaning it is completely dustproof and will not leak water even after short-term immersion. The polycarbonate material used in this embodiment has excellent UV resistance; its strength will not decrease by more than 15% after 10 years of continuous outdoor use. The silicone rubber sealing ring maintains stable elasticity and sealing performance within a temperature range of -40℃ to +80℃. The total weight of the entire protective structure is approximately 180g, and its impact on the load of the charging pile's main structure is negligible. Manufacturing costs are reduced by approximately 30% compared to traditional multi-layer sealing structures, and the assembly process is simple, requiring no special tools; ordinary operators can complete installation and maintenance.

[0046] The following is another specific embodiment 2 of this utility model: Embodiment 2 is based on Embodiment 1, but the structure of the guide plate is optimized and improved. A downward-extending water-blocking skirt is added to the outer edge of the guide plate. The water-blocking skirt is a vertically downward thin-walled structure continuously distributed along the entire circumference of the outer edge of the guide plate, with a height of 15mm and a thickness of 1.5mm. The inner surface of the water-blocking skirt smoothly transitions to the lower surface of the guide plate, and the outer surface is provided with longitudinally arranged fine ridges. The height of the longitudinal ridges is 0.3mm and the spacing is 2mm, which is used to disrupt the continuity of the water film and prevent rainwater from climbing upwards and flowing back along the outer surface of the water-blocking skirt. The bottom edge of the water-blocking skirt slopes outwards to form a drip edge design. Rainwater can quickly detach as droplets upon reaching the bottom of the skirt without adhering upwards along the inside of the skirt. This improved structure can more effectively prevent wind-blown rainwater from bypassing the outside of the deflector and entering the area above the drainage channel under windy conditions. Actual tests show that when the wind speed reaches 12 m / s, the deflector equipped with the water-blocking skirt can block approximately 40% more oblique rainwater compared to the structure in Example 1. The water-blocking skirt and the deflector are integrally molded, requiring no additional assembly process and not increasing manufacturing difficulty. The entire improvement significantly enhances the protective performance of the structure under extreme weather conditions such as typhoons and rainstorms, making it suitable for charging pile installations in coastal areas and windy regions.

[0047] The following is another specific embodiment 3 of this utility model: This embodiment 3 is based on embodiment 1, and the structure of the sealing ring is improved. The single triangular cross-section sealing ring is changed to a double-layer sealing ring structure. The first layer sealing ring is located on the inner circumferential wall of the protective shell near the opening end. Its cross-section is trapezoidal with an upper base width of 2mm, a lower base width of 4mm, and a height of 2.5mm. The second layer sealing ring is located inside the first layer sealing ring, 8mm away from the first layer. Its cross-section is semi-circular with a diameter of 3mm. Both layers of sealing rings are made of silicone rubber material, but the Shore hardness of the first layer sealing ring is 60~70° and the Shore hardness of the second layer sealing ring is 40~50°. When the charging plug is inserted, it first contacts the harder first layer sealing ring. This layer of sealing ring provides an initial sealing effect and protects the plug. The positioning and guiding function ensures that as the plug continues to penetrate, it contacts the second sealing ring, which has a lower hardness. This second sealing ring, made of a softer material, undergoes greater elastic deformation, fully filling the microscopic unevenness of the plug surface to form a more robust secondary seal. The cavity between the two sealing rings forms a buffer zone; even if a small amount of rainwater breaches the first seal, it will be blocked between the two layers and will not directly reach the charging interface. This improved design is particularly suitable for charging devices with older plugs that have worn or scratched surfaces. The combination of two sealing rings with different hardnesses can adapt to a wider range of changes in the plug surface condition, ensuring a long-term stable sealing effect. Practical applications show that the protective performance of the double-layer sealing ring structure is improved by approximately 60% compared to the single-layer structure, and its service life is extended by approximately 80%, making it particularly suitable for high-frequency public charging station scenarios.

[0048] Specifically, the principle of this utility model is as follows: This utility model adopts a protection principle combining active flow guidance and passive sealing to achieve comprehensive rain protection for the charging interface. The active flow guidance mechanism forms a two-stage rainwater interception and guidance system through the arc-shaped flow guidance slope on the top of the protective shell and the flow guidance plate on the outside. When rainwater falls on the flow guidance slope, due to the outward and downward arc-shaped structure of the slope, the rainwater flows radially outward under the combined action of gravity and the reaction force of the slope, and will not accumulate in the area directly above the interface. After the rainwater flows through the flow guidance slope, it is intercepted by the flow guidance plate after reaching the edge of the protective shell. The outward extension structure of the flow guidance plate and the inclined setting of the outer edge being lower than the inner edge allow the rainwater to continue to flow outward and be quickly discharged through the drainage channel formed between the lower end of the flow guidance plate and the surface of the shell. This active flow guidance design guides most of the rainwater to a safe area before it approaches the charging interface, reducing the amount of rainwater that needs to be sealed and blocked from the source. For the small amount of rainwater that may flow along the surface of the protective shell or be blown to the interface by the wind, the passive sealing mechanism... The sealing ring, embedded in the inner circumferential wall of the protective housing, has an inner diameter smaller than the outer diameter of the charging interface. When the charging plug is inserted, the sealing ring forms a tight annular contact with the outer surface of the plug. The elastic material of the sealing ring deforms under pressure, filling all the tiny gaps between the plug and the housing, forming a continuous sealing barrier to prevent rainwater from seeping in along the interface gaps. The interference fit between the sealing ring and the protective housing ensures that the sealing ring maintains a stable installation position during long-term use and will not loosen or fail due to vibration or temperature changes. The buffer groove at the bottom of the inner cavity of the protective housing serves as the last line of defense. Even if a tiny amount of water breaks through the previous protective layers, it will be collected in the buffer groove and discharged through natural evaporation or regular maintenance, without directly contacting the electrical parts of the charging interface. The entire protective system forms a multi-layered, gradient protection system from the outside to the inside, from active to passive. Each layer of protection mechanism is designed for specific rainwater intrusion paths and methods, ensuring effective protection of the charging interface under various rainfall intensities and wind directions.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rainproof interface structure for a charging pile, characterized in that, The device is designed to protect the charging interface from rainwater intrusion and includes a protective housing, a sealing ring, a flow guide plate, and a locking mechanism. The protective housing has a hollow cavity structure, and the top of the protective housing is provided with an arc-shaped flow guide slope with an outward and downward inclination angle. The sealing ring is embedded in the inner circumferential wall of the protective housing, and the inner diameter of the sealing ring is smaller than the outer diameter of the charging interface. The flow guide plate is fixedly connected to the outer surface of the protective housing, and the lower edge of the flow guide plate forms a downward-opening drainage channel with the outer surface of the protective housing. The locking mechanism is provided on the side wall of the protective housing and is used to realize the detachable connection between the protective housing and the charging pile body.

2. The rainproof interface structure of a charging pile according to claim 1, characterized in that, The highest point of the flow guiding slope is located directly above the geometric center of the protective housing, and the flow guiding slope extends radially outward to the edge of the protective housing.

3. The rainproof interface structure of a charging pile according to claim 2, characterized in that, The sealing ring is an annular protrusion structure, and the sealing ring is continuously distributed along the inner circumferential wall of the protective shell. The cross-section of the sealing ring is triangular or trapezoidal.

4. The rainproof interface structure of a charging pile according to claim 3, characterized in that, The guide plate is an outwardly extending plate-like structure. The extension direction of the guide plate is perpendicular to the axis of the protective shell, and the outer edge of the guide plate is lower than the inner edge.

5. The rainproof interface structure of a charging pile according to claim 4, characterized in that, The width of the drainage channel gradually increases from top to bottom in the vertical direction, with the upper end width being 3mm~5mm and the lower end width being 8mm~12mm.

6. The rainproof interface structure of a charging pile according to claim 5, characterized in that, The locking mechanism includes a buckle part and a slot part. The buckle part is disposed on the outer side wall of the protective housing, and the slot part is disposed on the charging pile body. The buckle part and the slot part are connected by an elastic snap-fit ​​method.

7. The rainproof interface structure of a charging pile according to claim 6, characterized in that, The latching part is an outwardly protruding elastic hook-shaped structure, with the hook end of the latching part facing the bottom of the protective shell, and the thickness of the latching part gradually decreasing from the root to the hook end.

8. The rainproof interface structure of a charging pile according to claim 7, characterized in that, The bottom of the inner cavity of the protective shell is provided with an inwardly recessed buffer groove, the depth of which is 2mm to 4mm and the cross-section of which is arc-shaped.

9. The rainproof interface structure of a charging pile according to claim 8, characterized in that, The sealing ring and the protective housing form an interference fit connection, and the material hardness of the sealing ring is lower than that of the protective housing.

10. The rainproof interface structure of a charging pile according to claim 9, characterized in that, The lower surface of the guide plate is provided with multiple parallel reinforcing ribs, which extend along the radial direction of the guide plate, and the spacing between two adjacent reinforcing ribs is 10mm~15mm.

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