An integrated plastic protection device assembly for a light commercial vehicle

Abstract

The application discloses the technical field of light commercial vehicle and is particularly a light commercial vehicle integrated plastic protection device assembly. The right side clamping groove of the protection device shell is connected with the protection device cover through a second spring structure, and the left side clamping groove of the protection device shell is connected with the protection device buckle through a first spring structure. Based on this, the weight of the device assembly can be reduced by more than 70% under the premise of ensuring the same structure size, the load of the charging device of the light commercial vehicle is effectively reduced, the material cost of the device assembly is reduced by more than 80% because the cost of plastic is lower than that of steel, the product life is effectively prolonged and the maintenance cost is reduced because of the newly designed opening and closing structure in terms of product reliability, and the vehicle production and subsequent operation costs are further reduced in terms of the whole life cycle in combination with the chain effect of the light weight, high protection and high reliability of the protection device assembly.

Description

Technical Field

[0001] This invention relates to the field of light commercial vehicle technology, specifically to an integrated plastic protective device assembly for light commercial vehicles. Background Technology

[0002] With the rapid development of the automotive industry towards new energy, the electrification trend of light commercial vehicles is becoming increasingly apparent. As a core energy replenishment component for vehicles, reducing the weight of charging devices, improving protection, and controlling costs are important development goals for charging interfaces.

[0003] Currently, most charging interfaces on new energy light commercial vehicles lack protective devices, with only the charging socket itself having a cover, resulting in insufficient protection. In outdoor parking and operation scenarios, dust and rainwater can easily penetrate the charging socket, causing connector oxidation, increased contact resistance, and even short circuits and leakage risks. During daily vehicle operation and high-pressure car washing, continuous vibration and water pressure can easily cause the socket's cover to detach or fail to seal, allowing mud and sand to enter the interface, causing plug-in jamming, accelerating component aging and damage. This makes it difficult to adapt to the complex working conditions of commercial vehicles, such as outdoor operation, dust and mud, high-pressure washing, and vibration and impact, and it is prone to sealing failure and interface damage, failing to guarantee the safety and lifespan of the charging interface. Many vehicle models use metal protective devices. Steel or aluminum alloy protective devices are dense and heavy, increasing the load on the mounting points on the vehicle's sides and raising the overall vehicle weight. This is detrimental to improving the vehicle's range and does not meet the requirements of lightweight vehicle development. Furthermore, metal parts require multiple processes such as stamping, bending, and painting, resulting in a long production process, high manufacturing costs, and a susceptibility to corrosion over long-term use. Meanwhile, traditional protective devices generally use a hinge and lock structure. The separate hinge and lock structure has many parts, complex assembly processes, and the hinge pins are prone to play and jamming after long-term wear. The lock structure is also prone to automatic unlocking under prolonged vehicle vibration, causing the protective cover to open unexpectedly and lose its protective function. These devices suffer from poor reliability, susceptibility to loosening and jamming due to vibration, and insufficient ease of operation. Furthermore, most protective devices are only compatible with single-interface layouts, failing to meet the installation requirements of integrated fast and slow charging or dual fast charging interfaces. This necessitates the use of two sets of protective devices, which not only occupies installation space but also increases costs. This results in low space utilization, poor adaptability, and difficulty in meeting the requirements of multi-scenario charging and large-scale applications, thus hindering the stable operation and technological upgrades of charging systems for new energy light commercial vehicles. Therefore, this invention provides an integrated plastic protective device assembly for light commercial vehicles. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An integrated plastic protective device assembly for light commercial vehicles includes a protective device housing, a protective device cover, and a protective device buckle. The right side slot of the protective device housing is connected to the protective device cover via a second spring structure, and the left side slot of the protective device housing is connected to the protective device buckle via a first spring structure.

[0005] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles described in this invention, the protective device housing, the protective device cover, and the protective device buckle are all structural components integrally molded from nylon and 30% glass fiber modified plastic, together forming the main body of the protective device assembly.

[0006] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles described in this invention, the inner side of the protective device housing is provided with reinforcing ribs, the number of which is six, distributed in the circumferential area of ​​the inner side of the protective device housing, and the reinforcing ribs extend along the inner wall of the protective device housing.

[0007] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles described in this invention, the protective device housing is provided with a foam cushioning structure inside, and the number of foam cushioning structures is four, which are respectively arranged at the four corners of the bottom inner side of the protective device housing.

[0008] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles described in this invention, the second spring structure is used to hinge the right side slot of the protective device housing to the protective device cover, so as to realize the opening and closing action of the protective device cover relative to the protective device housing. Under the action of the second spring structure, the maximum opening and closing angle of the protective device cover relative to the protective device housing is 105 degrees.

[0009] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles according to the present invention, the first spring structure is used to connect the left side slot of the protective device housing with the protective device buckle.

[0010] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles described in this invention, the left side slot of the protective device housing is further provided with a double spring slot structure, and the first spring structure is installed in the double spring slot structure.

[0011] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles according to the present invention, the inner cross-section of the double spring groove structure corresponds to the outer contour of the spring of the first spring structure, and is used to spatially limit the spring of the first spring structure during the opening and closing of the protective device.

[0012] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles described in this invention, the first spring structure and the second spring structure both include a custom spring and a fixing pin. The fixing pin is rotatably connected to the left and right slots of the protective device housing. The custom spring is sleeved on the fixing pin and abuts against the left slot of the protective device housing and the protective device buckle, and the right slot of the protective device housing and the protective device cover, respectively, to provide the elastic force required for opening, closing or locking.

[0013] As a preferred embodiment of the integrated plastic protective device assembly for light commercial vehicles described in this invention, it further includes a high-voltage warning label, which is affixed and fixed to the front of the protective device cover.

[0014] Compared with existing technologies: 1. Through the overall structural design of the integrated closed shell and the lockable protective cover, the built-in charging interface is fully wrapped and protected, which can effectively block the intrusion of outdoor dust, rainwater and mud, resist high pressure washing and driving vibration impact, and ensure the safety and service life of the charging interface. 2. By using glass fiber modified nylon plastic integral injection molded main components to replace traditional metal protective devices, the device's weight and material manufacturing costs can be significantly reduced, while also possessing excellent weather resistance and corrosion resistance, meeting the needs of vehicle lightweighting and cost reduction. 3. By using a spring-hinged opening and closing structure combined with a double-spring groove limiting buckle locking structure, the spring is precisely spatially constrained, which can achieve smooth and stable opening and closing action, avoid loosening and jamming failures under long-term vibration, and improve the reliability of the structure and the service life of the components. 4. With its integrated shell layout design featuring a large internal space, no additional protective structure is required. It can meet the installation requirements of single-interface, fast and slow charging integration, and dual fast charging interfaces, improving space utilization and vehicle compatibility, and satisfying the needs of various energy replenishment applications. Attached Figure Description

[0015] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from the right side; Figure 3This is a schematic diagram of the overall structure of the present invention from the left side; Figure 4 This is a front view schematic diagram of the housing structure of the protective device of the present invention; Figure 5 This is a schematic left-side view of the housing structure of the protective device of the present invention.

[0016] In the diagram: 1. Protective device housing; 2. Protective device cover; 3. High-voltage warning sign; 4. Protective device buckle; 5. First spring structure; 6. Second spring structure; 7. Reinforcing rib; 8. Foam cushioning structure. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0018] For new energy light commercial vehicles requiring high protection, high opening and closing reliability, weight reduction, and cost reduction in charging interfaces, this invention provides an integrated plastic protective device assembly for light commercial vehicles. Please refer to [link / reference]. Figures 1-5 The assembly includes a protective device housing 1, a protective device cover 2, and a protective device buckle 4. The right side slot of the protective device housing 1 is connected to the protective device cover 2 via a second spring structure 6, and the left side slot of the protective device housing 1 is connected to the protective device buckle 4 via a first spring structure 5. This assembly is installed as a whole in the charging port mounting position on the side of a light commercial vehicle. It internally houses the vehicle charging interface components and can accommodate various layouts, including a single DC fast charging interface, and dual AC slow charging and DC fast charging interfaces side-by-side. It provides enclosed protection for the charging interface, resisting corrosion and damage to the interface under complex outdoor conditions.

[0019] The protective device housing 1 is a rectangular box-shaped structure with one open end, extending along the vehicle's interior and exterior directions. The opening faces the outer side of the vehicle, and the bottom faces the inner side. An internal cavity is formed to accommodate the vehicle's charging interface, compatible with integrated fast / slow charging or dual fast charging interface installation layouts. A reasonable assembly gap is reserved between the inner cavity sidewall of the housing and the outer wall of the charging interface, allowing for flexible positioning of the interface in conjunction with the internal buffer structure. The outer peripheral sidewall of the housing adopts a uniform wall thickness design, with wall thickness parameters adapted to the injection molding process requirements of glass fiber reinforced plastic, ensuring smooth melt flow and avoiding molding defects such as shrinkage marks and stress concentration caused by abrupt changes in wall thickness. The right and left side slots of the housing are both U-shaped groove structures recessed inward from the open end of the housing. The two sidewalls of the slots are integrally formed on the sidewall of the housing. The depth of the slots is adapted to the swing trajectory of the hinge lugs and the rotating part of the buckle, providing ample space for the rotating components. Simultaneously, the sidewalls of the slots have sufficient structural thickness to withstand spring forces and opening / closing impact forces.

[0020] The protective device housing 1, the protective device cover 2, and the protective device buckle 4 are all integrally injection molded structural components made of nylon 66 and 30% glass fiber modified plastic, forming the main body of the protective device assembly. By using an integrally injection molded modified plastic main structure, the device achieves overall lightweighting and reduced production material costs, while possessing excellent weather resistance, corrosion resistance, and structural strength, making it suitable for the complex outdoor operating conditions of commercial vehicles. Specifically, the addition of 30% glass fiber to the nylon 66 base material significantly improves the material's tensile strength, flexural strength, and impact toughness, allowing it to withstand road debris and minor impacts without cracking or deformation. Simultaneously, this modified material exhibits wide temperature range stability, operating stably for extended periods in ambient temperatures ranging from -40℃ to 85℃, meeting the needs of commercial vehicles operating across diverse regions and in all seasons. The material itself possesses excellent chemical resistance, resisting corrosion from road surface splashes of oil, de-icing salt, car wash detergents, and other media, fundamentally avoiding the problems of traditional metal protective devices being prone to rust and requiring surface anti-corrosion treatment. The one-piece injection molding process can process all auxiliary structures such as the main body of the shell, the slot structure, the reinforcing ribs, and the mounting flange in one go, without the need for secondary processes such as welding, riveting, and bending. This greatly reduces the assembly process, improves the consistency of product structure and production efficiency, and is suitable for mass production.

[0021] The inner side of the protective device housing 1 is provided with six reinforcing ribs 7, distributed in the circumferential area of ​​the inner side of the protective device housing 1. The reinforcing ribs 7 extend axially along the inner wall of the protective device housing 1, and each reinforcing rib is integrally injection molded with the inner wall of the housing. By providing multiple reinforcing ribs circumferentially on the inner side of the housing, the structural strength of the device is effectively increased, the impact resistance and deformation resistance of the housing are improved, and external collisions and compression damage to the internal charging interface are prevented. The reinforcing rib structure can significantly improve the overall bending and torsional stiffness and dent resistance of the housing without significantly increasing the housing wall thickness and overall weight. When the vehicle encounters flying stones, foreign object impacts, or water pressure impacts during driving, the reinforcing ribs can quickly disperse the impact force, preventing local plastic deformation or even cracking of the housing, and stably protecting the internal charging interface from external damage. Meanwhile, the circumferentially distributed reinforcing ribs can improve the dimensional stability of the shell, reduce the shrinkage deformation after injection molding, ensure the flatness of the shell opening end face, improve the fitting accuracy between the shell and the protective device cover, make the cover fit more tightly after closing, and improve the overall dustproof and waterproof performance.

[0022] The protective device housing 1 is internally equipped with a foam buffer structure 8, which is a closed-cell flame-retardant foam buffer pad. It is fixed to the inner wall of the housing with adhesive. There are four foam buffer structures 8, located at the four corners of the bottom inner side of the protective device housing 1. When the charging interface is installed inside the housing, the foam buffer structure is positioned between the charging interface and the bottom of the housing. Through its own elastic deformation, it absorbs vibration and impact energy, achieving buffering and vibration reduction, reducing interface wear, filling installation gaps, and improving dustproof sealing performance. The foam buffer structure is specifically made of closed-cell EPDM rubber foam, which has excellent elastic recovery rate and low compression set characteristics. Even after long-term assembly pressure and vibration compression, it can stably maintain its buffering capacity and is not prone to elastic failure. The foam surface is coated with an environmentally friendly flame-retardant coating, meeting the flame-retardant rating requirements of vehicle electrical components and conforming to the safety specifications of high-voltage charging components.

[0023] The protective cover 2 is sized to fit the opening of the protective device housing 1, and when closed, it completely covers the opening face of the housing. At least two symmetrically distributed hinge ears are integrally formed on its right edge, each extending into a corresponding right-side slot in the protective device housing 1. A locking groove, compatible with the protective device's latch, is located in the center of the left edge of the cover. Specifically, the protective cover is a flat, circumferentially flanged structure. The flange extends towards the housing side, and when closed, it covers the outer periphery of the housing opening, forming a labyrinthine protective structure. This effectively prevents rainwater and dust from entering the housing through the gaps, enhancing overall protection. Two coaxial precision pin holes are provided on the two hinge ears of the cover. The diameter of the pin holes is clearance-fitted with the outer diameter of the fixing pin. The fit tolerance has been optimized to ensure smooth rotation of the hinge ears around the fixing pin while controlling radial play, preventing cover wobbling and abnormal noise. The locking groove on the left side of the cover is recessed inward, and the upper sidewall of the groove forms a smooth locking step that precisely matches the hook of the protective device's buckle. The contact surface of the locking step is equipped with micro-anti-slip serrations, which can improve the static friction after locking and further reduce the risk of vibration-induced loosening. The outer surface of the cover is a smooth arc surface, which can match the exterior shape of the vehicle body side panel, improving the consistency and aesthetics of the overall appearance. The inner surface of the cover is equipped with a mesh-like fine reinforcing rib, which improves the dent resistance without increasing the weight of the cover and resists external pressure and impact. The protective device cover and the shell are integrally injection molded from the same nylon 66 + 30% glass fiber material. The coefficients of thermal expansion of the two are exactly the same. When the ambient temperature changes drastically, the fit clearance can remain stable, avoiding problems such as jamming or excessive gaps caused by thermal expansion and contraction.

[0024] The second spring structure 6 is used to hinge the right side slot of the protective device housing 1 to the protective device cover 2, so as to realize the opening and closing action of the protective device cover 2 relative to the protective device housing 1. Under the elastic force of the second spring structure 6, the maximum opening and closing angle of the protective device cover 2 relative to the protective device housing 1 is 105 degrees. After opening, it can maintain a stable open state without manual support, which greatly improves the convenience of charging operation. By setting the hinged protective cover structure with spring return, the protective cover can automatically pop open and open and close smoothly, improving the convenience of operation. The 105-degree maximum opening angle of the protective cover is precisely limited by a mechanical limiting structure: a limiting step is set inside the slot, and a corresponding limiting surface is set at the lower end of the hinge ear. When the cover is opened to 105 degrees, the limiting surface of the hinge ear and the limiting step at the bottom of the slot tightly abut against each other, preventing the cover from rotating further and maintaining a stable open position. It will not fall back due to its own weight, nor will it shake due to wind or slight touch. No operator is required to hold it steady during charging, greatly improving the convenience and safety of charging operations. This spring hinge structure replaces the traditional split hinge with an external spring. The highly integrated design reduces the number of parts and assembly complexity. The opening and closing action is entirely driven by spring force, ensuring reliable operation and a low failure rate, making it suitable for the high-frequency use requirements of commercial vehicles.

[0025] The protective device buckle 4 is a press-type lever lock structure that extends into the left side slot of the protective device housing 1. Its upper end has a hook portion extending towards the opening of the housing, and a guide slope is provided on the side of the hook portion facing the cover. The protective device buckle is divided into three parts: an upper hook portion, a middle rotating connecting portion, and a lower pressing portion. The middle rotating connecting portion has a horizontally penetrating pin hole, which passes through a fixing pin to achieve hinged connection with the housing slot. The upper hook portion extends horizontally towards the cover, forming a downward hook-shaped structure at its end. The lower surface of the hook portion is a smooth guide slope, and the upper surface is a flat locking plane. The lower pressing portion extends towards the outside of the vehicle, and the pressing surface is provided with dense anti-slip stripes to facilitate pressing and prevent slippage during operation.

[0026] The first spring structure 5 is used to connect the left side slot of the protective device housing 1 with the protective device buckle 4. The left side slot of the protective device housing 1 also has a double spring groove structure. The first spring structure 5 is installed within the double spring groove structure, effectively enhancing the lifespan and opening / closing reliability of the spring structure. The inner cross-section of the double spring groove structure corresponds to the outer contour of the spring in the first spring structure 5, consisting of two parallel arc-shaped limiting grooves that respectively accommodate the two helical segments of the spring. These grooves are used to radially limit the spring in the first spring structure 5 during the opening and closing of the protective device buckle 4, restricting the spring's movement and offset to prevent the spring from loosening or jamming within the spring structure. By using the double spring grooves to limit the spring and engage with the buckle locking structure, the locking structure achieves stable and reliable operation, avoids vibration-induced loosening, and improves the lifespan of the opening and closing structure. The customized spring in the first spring structure is a double torsion spring structure, sharing the same material and manufacturing standards as the spring in the second spring structure. Both are made of stainless steel, possessing excellent fatigue resistance and corrosion resistance. The double-spring groove structure consists of two parallel arc-shaped grooves integrally injection-molded on the inner wall of the slot. The axis of the grooves is strictly coaxial with the axis of the fixing pin, and the inner diameter of the groove is slightly larger than the outer diameter of the spring helix, forming a precise clearance fit. The two spring helices are respectively embedded in their corresponding arc-shaped grooves. One end of the spring's torsion arm stably abuts against the shoulder of the inner wall of the slot, while the other end's torsion arm abuts against the force-bearing surface of the rotating connection of the protective device's buckle, providing a continuous locking torsional force to the buckle, ensuring that the buckle's hook always tends to rotate towards the cover. The double-spring groove structure not only provides precise installation positioning for the springs but, more importantly, provides dual radial and axial limiting for the spring helices during the reciprocating opening and closing of the buckle. Traditional slotless springs are prone to radial movement and axial displacement under long-term reciprocating torsion and strong vibration environments, which can lead to spring torsion arm disengagement, sluggish operation, or even spring breakage and failure. In this structure, the spring helix is ​​confined within an arc-shaped groove, and it slides smoothly along the groove wall during torsion without radial displacement. The side wall of the groove also prevents the spring from axially moving out, ensuring that the spring is always in the correct working position. This significantly improves the service life and operational reliability of the spring, making it fully suitable for the harsh operating conditions of commercial vehicles with high-frequency opening and closing and strong vibration.

[0027] Both the first spring structure 5 and the second spring structure 6 include a custom spring and a fixing pin. The custom spring is a stainless steel torsion spring with good fatigue resistance and corrosion resistance. The left and right side walls of the protective device housing 1 are provided with coaxial pin holes. The fixing pin passes through the pin holes to achieve axial fixation. The rotating parts in the slots rotate with the fixing pins. The custom spring is sleeved on the fixing pin, and its two torsion arms abut against the inner wall of the slot and the corresponding rotating parts, respectively. That is, they abut against the left side slot of the protective device housing 1 and the protective device buckle 4, and the right side slot of the protective device housing 1 and the protective device cover 2, respectively, to provide the elastic force required for opening, closing or locking, so that the protective device cover has an automatic opening tendency and the protective device buckle has an automatic locking tendency. The self-locking principle of this locking structure is as follows: When the protective cover is closed, the left edge of the cover first contacts the guide slope of the latch hook. As the cover continues to rotate inward, the cover applies an outward horizontal force to the guide slope, pushing the latch to overcome the spring force and rotate outward. When the cover is fully closed, the latch automatically resets under the action of the spring force and engages in the locking groove of the cover. The locking plane and the engaging step of the cover fit tightly together, completing the automatic locking. During vehicle operation, vibration and impact forces act perpendicularly on the cover and are transmitted outward. This force makes the engaging step fit more tightly with the locking plane, preventing the unlocking action. Structurally, this avoids the common problem of traditional locks easily loosening due to vibration. To unlock, simply press the lower pressing part of the latch inward, using the lever principle to make the upper latch hook swing outward and disengage from the locking groove, thus completing the unlocking process. The entire process can be operated with one hand, making it convenient and efficient.

[0028] It also includes a high-voltage warning sign 3, which is made of weather-resistant self-adhesive material, with high-voltage warning symbols and warning text printed on the surface. It is affixed and fixed to the center of the front of the protective device cover 2, providing a direct indication of high-voltage risks and improving operational safety while warning unauthorized personnel. Specifically, the high-voltage warning sign uses a weather-resistant self-adhesive label with a PET substrate and a wear-resistant and scratch-resistant UV protective coating, allowing it to withstand long-term exposure to sunlight, rain, and high-pressure water jets without peeling, fading, or curling. The sign features high-voltage hazard warning symbols and clear warning text as specified in national standards, using a striking yellow background and black text color scheme for high visual recognition. The front of the protective device cover has a micro-recessed installation area matching the size of the sign, with the recess depth consistent with the sign thickness. After affixing, the sign surface is flush with the cover surface, preventing scratches and detachment during daily use. High-voltage warning signs can visually alert operators and unauthorized personnel that the vehicle contains high-voltage charging components during vehicle maintenance and charging operations, enhancing the safety warning effect, reducing the risk of electric shock caused by misoperation, and meeting the safety labeling standards for high-voltage components in new energy vehicles.

[0029] The procedure for using this device is as follows: When the vehicle is parked or in motion, the protective cover is in a closed and locked state, completely sealing the charging interface inside the housing, preventing the intrusion of external dust, rainwater, and mud, and providing all-round protection for the charging interface.

[0030] When charging is required, the operator stands to the side of the vehicle, presses the lower pressing part of the protective device buckle with one thumb, and gently supports the edge of the cover with the other fingers; after the thumb applies pressure, the buckle rotates around the fixing pin, and the upper hook part swings outward, disengaging from the locking groove of the protective cover, thus unlocking; at this time, under the elastic force of the second spring structure, the protective device cover automatically springs outward around the right hinge axis until the hinge ear abuts against the limit step in the slot, and is stably maintained at the maximum opening position of 105 degrees; the operator can then insert the charging gun plug into the internal charging interface to perform the charging operation.

[0031] After charging is complete, the operator pulls out the charging gun and pushes the outer side of the protective device cover inward to close it with one hand. When the left edge of the cover contacts the guide slope of the buckle hook, it automatically pushes the buckle to rotate outward to make room. After the cover is fully closed, the buckle automatically rebounds and locks under the elastic force of the first spring structure. The operator hears a clear "click" sound, which indicates that the locking is in place and the protective device re-enters the closed protective state.

[0032] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An integrated plastic protective device assembly for light commercial vehicles, comprising a protective device housing (1), a protective device cover (2), and a protective device buckle (4), characterized in that, The right side slot of the protective device housing (1) is connected to the protective device cover (2) through the second spring structure (6), and the left side slot of the protective device housing (1) is connected to the protective device buckle (4) through the first spring structure (5).

2. The integrated plastic protective device assembly for light commercial vehicles according to claim 1, characterized in that, The protective device housing (1), the protective device cover (2), and the protective device buckle (4) are all structural components integrally molded from nylon 66 and 30% glass fiber modified plastic, which together constitute the main body of the protective device assembly.

3. The integrated plastic protective device assembly for light commercial vehicles according to claim 1, characterized in that, The inner side of the protective device housing (1) is provided with reinforcing ribs (7). There are six reinforcing ribs (7) distributed in the circumferential area of ​​the inner side of the protective device housing (1), and the reinforcing ribs (7) extend along the inner wall of the protective device housing (1).

4. The integrated plastic protective device assembly for light commercial vehicles according to claim 1, characterized in that, The protective device housing (1) is provided with a foam cushioning structure (8) inside. There are four foam cushioning structures (8), which are respectively arranged at the four corners of the bottom inside the protective device housing (1).

5. The integrated plastic protective device assembly for light commercial vehicles according to claim 1, characterized in that, The second spring structure (6) is used to hinge the right side slot of the protective device housing (1) to the protective device cover (2) so as to realize the opening and closing action of the protective device cover (2) relative to the protective device housing (1). Under the action of the second spring structure (6), the maximum opening and closing angle of the protective device cover (2) relative to the protective device housing (1) is 105 degrees.

6. The integrated plastic protective device assembly for light commercial vehicles according to claim 1, characterized in that, The first spring structure (5) is used to connect the left side slot of the protective device housing (1) to the protective device buckle (4).

7. The integrated plastic protective device assembly for light commercial vehicles according to claim 6, characterized in that, The left side slot of the protective device housing (1) is also provided with a double spring slot structure, and the first spring structure (5) is installed in the double spring slot structure.

8. The integrated plastic protective device assembly for light commercial vehicles according to claim 7, characterized in that, The inner cross-section of the double spring groove structure corresponds to the outer contour of the spring of the first spring structure (5), and is used to spatially limit the spring of the first spring structure (5) during the opening and closing of the protective device buckle (4).

9. The integrated plastic protective device assembly for light commercial vehicles according to claim 6, characterized in that, Both the first spring structure (5) and the second spring structure (6) include a custom spring and a fixing pin. The left and right slots of the protective device housing (1) are rotatably connected to the fixing pin. The custom spring is sleeved on the fixing pin and abuts against the left slot of the protective device housing (1) and the protective device buckle (4) and the right slot of the protective device housing (1) and the protective device cover (2) respectively, so as to provide the elastic force required for opening, closing or locking.

10. The integrated plastic protective device assembly for light commercial vehicles according to claim 1, characterized in that, It also includes a high-voltage warning sign (3), which is affixed and fixed to the front of the protective device cover (2).

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