A commercial vehicle front bulkhead junction box and a new energy commercial vehicle

Abstract

This utility model discloses a junction box for a commercial vehicle's front firewall and a new energy commercial vehicle, comprising: a mounting plate fixed to the mounting surface of the front firewall sheet metal, the mounting plate having multiple first semi-circular grooves at the lower end of its front side, studs and connector mounting areas on the mounting plate, the studs including grounding studs and power studs, and anti-loss rubber insulating caps installed on the inner and outer sides of each stud; a top cover mounted on the mounting plate, the top cover having a warning sign on its front side, a sealing structure between its back side and the mounting plate, and multiple second semi-circular grooves at the lower end of the back side of the top cover, the second semi-circular grooves cooperating with the first semi-circular grooves to form cylindrical wire passage holes; and a wire passage hole mounting component, including a wire passage hole plug and a wire passage hole clip, both installed in the wire passage hole, with a limiting structure between the wire passage hole mounting component and the mounting plate and top cover. This utility model can effectively improve the dustproof, waterproof, and noiseproof performance of the junction box location in the driver's cabin firewall, and improve the waterproof performance of the connectors installed thereon.

Description

Technical Field

[0001] This utility model relates to a junction box for the front firewall of a commercial vehicle and a new energy commercial vehicle, belonging to the field of automotive electrical technology. Background Technology

[0002] The junction box in the front firewall of commercial vehicles serves to separate the chassis from the driver's cab electrical system, handling functions such as wiring harness plug-in connections, connector installation and fixation, and power and grounding wiring harness connections. As commercial vehicles, especially new energy vehicles, face increasingly stringent waterproofing requirements, there is a greater emphasis on preventing electrical fires to protect vehicle and cab safety. Currently, the junction box in the front firewall of commercial vehicles has the following disadvantages:

[0003] 1. Some trucks or engineering vehicles operate in harsh environments, and the firewall wiring holes lack sealing structures, allowing external dust and moisture to directly enter the cab, affecting the cab's airtightness.

[0004] 2. Junction boxes are generally made of plastic and are installed on the front sheet metal. Due to vehicle use and environmental factors, firewall junction boxes are prone to aging and deformation, resulting in gaps at the contact surface with the front sheet metal, causing poor sealing, dust and water ingress, and excessive noise in the driver's cabin.

[0005] 3. Junction boxes are generally installed on the front bulkhead sheet metal near the floor. The installation position is relatively low. The part of the firewall junction box inside the driver's cabin is prone to condensation from the air conditioning ducts above it dripping onto the connectors on the firewall mounting plate, causing electrical faults such as short circuits in the wiring harness. In severe cases, it can lead to an electrical fire that causes the vehicle to spontaneously combust.

[0006] 4. The power supply and grounding metal terminals on some firewall connectors are directly exposed. When vehicles are undergoing electrical repairs and maintenance, this can easily cause accidental short circuits, posing a certain safety hazard. Summary of the Invention

[0007] To address the problems existing in the prior art, this utility model provides a front firewall junction box for commercial vehicles and a new energy commercial vehicle, which can effectively improve the dustproof, waterproof, and noiseproof performance of the firewall junction box in the driver's cabin, as well as improve the waterproof performance of the connectors installed thereon.

[0008] To achieve the above objectives, this utility model employs a junction box for the front firewall of a commercial vehicle, comprising:

[0009] The mounting plate is fixed to the mounting surface of the front sheet metal by screwing. The lower front end of the mounting plate is provided with multiple first semi-circular grooves. The mounting plate is provided with studs and connector mounting areas. The studs include grounding studs and power studs. Anti-loss rubber insulating caps are installed on the inner and outer sides of each stud.

[0010] The top cover is installed on the mounting plate. The front of the top cover is provided with a warning sign, and the back is provided with a sealing structure between it and the mounting plate. The lower back of the top cover is provided with multiple second semi-circular grooves. The second semi-circular grooves cooperate with the first semi-circular grooves of the mounting plate to form a cylindrical wire hole.

[0011] The wire hole mounting component includes a wire hole plug and a wire hole clip, which are respectively installed in the wire hole, and a limiting structure for positioning and fixing is provided between the wire hole mounting component and the mounting plate and the top cover.

[0012] As an improvement, a mounting plate sealing sponge is provided between the back of the mounting plate and the front bulkhead sheet metal, and the mounting plate sealing sponge is arranged in a ring on the back of the mounting plate;

[0013] The connector mounting area forms multiple connector mounting ports with consistent structural dimensions through a crisscrossing grid structure.

[0014] As an improvement, the warning signs include a "No Spraying" sign and a "Danger of Electricity" sign, both of which are located on the front of the top cover.

[0015] As an improvement, the sealing structure between the back of the top cover and the mounting plate includes a top cover sealing strip and a short rib;

[0016] The sealing strip of the top cover is arranged in a U-shape on the back of the top cover, and the short rib is arranged in a U-shape on the front of the mounting plate; when the top cover is assembled on the mounting plate, the sealing strip of the top cover and the short rib form an interference fit.

[0017] As an improvement, the limiting structure includes a stepped limiting protrusion, a limiting rib, and a limiting boss.

[0018] The stepped limiting protrusion is disposed in the first semicircular groove of the mounting plate, the limiting rib is disposed in the second semicircular groove of the upper cover, and the limiting boss is disposed on the wire hole plug and the wire hole clip respectively. The limiting boss is used to engage with the stepped limiting protrusion and the limiting rib respectively during assembly to achieve the positioning and fixing of the wire hole plug and the wire hole clip in the wire hole.

[0019] As an improvement, a circumferential sealing structure is provided inside the wire passage hole, the circumferential sealing structure including an upper cover sealing sponge and a wire passage hole sealing sponge;

[0020] The sealing sponge of the upper cover is disposed in the first semicircular groove of the mounting plate, and the sealing sponge of the wire passage hole is disposed in the second semicircular groove of the upper cover; when the first semicircular groove and the second semicircular groove cooperate to form a cylindrical wire passage hole, the sealing sponge of the upper cover and the sealing sponge of the wire passage hole cooperate to form a circumferential seal around the wire passage hole mounting component.

[0021] As an improvement, the side of the upper cover is provided with a plurality of upper cover reinforcing ribs, which extend along the height direction of the upper cover;

[0022] The side of the top cover and the side of the mounting plate are respectively provided with a number of recessed platforms, which are distributed at intervals along the circumference of the side.

[0023] As an improvement, a cover plate is provided on the front side of the mounting plate. The cover plate is arranged in a U-shape around the side of the mounting plate to protect the assembled connectors.

[0024] As an improvement, the number of wire holes is 5, and the structural dimensions of each wire hole are the same.

[0025] In a second aspect, this utility model also provides a new energy commercial vehicle, wherein the aforementioned commercial vehicle front firewall junction box is installed on the new energy commercial vehicle.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] (1) High ease of installation and stable and reliable fixation. The mounting plate is directly fixed to the front sheet metal mounting surface by screws, and the top cover is then assembled on the mounting plate. This layered screw structure makes on-site installation simple and efficient, and ensures that the junction box is firmly connected to the front sheet metal, avoiding loosening caused by vehicle vibration. At the same time, the wire hole plug and wire clip are fixed by the limiting structure and the mounting plate and top cover, and can be assembled and disassembled without additional tools, further improving the flexibility of on-site assembly and reducing the difficulty of construction.

[0028] (2) Excellent sealing performance and longer service life. A sealing structure is provided between the back of the top cover and the mounting plate, which can effectively prevent external moisture and dust from entering the junction box; and the grounding studs and power studs on the mounting plate are equipped with anti-loss rubber insulating caps on both the inner and outer sides, which not only prevents the studs from being exposed to moisture and corrosion, but also prevents accidental electric shock. The dual protection design greatly reduces the failure of internal components of the junction box caused by moisture and corrosion, and significantly extends its service life.

[0029] (3) Comprehensive protection functions and adequate safety assurance. The mounting plate has a dedicated connector installation area, which can standardize the assembly position of connectors and avoid messy connector arrangement; the warning signs on the front of the cover can intuitively remind operators of precautions such as prohibition of spraying and danger of electricity, reducing the risk of misoperation; at the same time, the wiring hole mounting parts are fixed by the limiting structure, which can prevent the cover and wire clip from falling off and causing the wiring harness to loosen, reducing electrical faults caused by poor wiring harness contact, indirectly reducing the risk of electrical short circuit fire in the vehicle, and providing strong protection for vehicle driving and personnel safety.

[0030] (4) Wide range of applications and greater versatility. The first semicircular groove of the mounting plate and the second semicircular groove of the top cover form a cylindrical wire hole. The number and position of wire hole plugs and wire clips can be flexibly selected according to the wiring harness layout requirements of different car models. Unused wire holes are sealed with plugs, and wire holes that need to be threaded are fixed with wire clips. There is no need to design junction box structures separately for different car models, which greatly improves the versatility of the product and reduces the adaptation cost for car manufacturers. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the structure of the top cover of this utility model;

[0034] Figure 3 This is a rear view of the top cover of this utility model;

[0035] Figure 4 This is a schematic diagram of the mounting plate of this utility model;

[0036] Figure 5 This is a rear view of the mounting plate of this utility model;

[0037] Figure 6 This is a schematic diagram of the wire-through hole mounting component of this utility model installed on the mounting plate;

[0038] Figure 7 This is a schematic diagram of the wire hole mounting component of this utility model installed on the top cover;

[0039] Figure 8 This is a schematic diagram of the assembly of the present invention on the front sheet metal;

[0040] In the diagram: 1. Top cover, 11. Top cover mounting hole, 12. No spray sign, 13. Electricity hazard sign, 14. Top cover reinforcing rib, 15. Top cover recess, 16. Top cover sealing sponge, 17. Top cover sealing strip, 18. Limiting rib.

[0041] 2. Mounting plate; 21. Stud; 22. Connecting hole; 23. Connector mounting area; 24. Stepped limiting protrusion; 25. Wire hole sealing sponge; 26. Short rib; 27. Mounting plate recess; 28. Mounting plate sealing sponge; 29. ​​Cover plate.

[0042] 3. Wire hole plug; 31. Plug limiting boss;

[0043] 4. Cable clip with cable pass-through hole; 41. Cable clip limiting boss;

[0044] 5. Front panel sheet metal. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0046] like Figures 1-8 As shown, a junction box for a commercial vehicle's front firewall includes a mounting plate 2, a top cover 1, and wiring hole mounting components. Each component is structurally designed to balance assembly stability, protection reliability, and scenario adaptability. The specific structure is as follows:

[0047] The mounting plate 2 is provided with connection holes 22 and is fixed to the mounting surface of the front bulkhead sheet metal 5 by screwing. The screwing method can not only ensure that the mounting plate 2 is firmly connected to the vehicle body structure, reducing vibration and impact during vehicle operation, but also facilitate precise on-site installation. The lower front end of the mounting plate 2 is provided with multiple first semi-circular grooves, providing a foundation for the subsequent formation of complete wire passage holes. The mounting plate 2 also integrates studs 21 and connector mounting areas 23. The studs 21 are divided into grounding studs and power studs, which can realize the classified connection of grounding wires and power wires, avoiding electrical faults caused by wiring confusion. Each stud is equipped with anti-loss rubber insulating caps on both the inner and outer sides, which can not only isolate moisture and prevent the studs from getting damp and corroding to extend their service life, but also prevent personnel from accidentally touching live studs and causing safety accidents. At the same time, the anti-loss design can prevent the insulation caps from being lost and causing protection failure, ensuring long-term protection effect.

[0048] The upper cover 1 is provided with an upper cover mounting hole 11 and is installed on the mounting plate 2 by bolts. The front of the upper cover is provided with a warning sign, which can intuitively remind the operator to avoid the risk of misoperation and improve the safety of use. The back of the upper cover 1 and the mounting plate 2 are provided with a sealing structure, which can effectively fill the gap between the two and prevent external moisture and dust from entering the junction box and protect the internal electrical components. Furthermore, the lower back of the upper cover 1 is provided with multiple second semi-circular grooves, which correspond one-to-one with the first semi-circular grooves of the mounting plate 2 to form cylindrical wire passage holes, providing a neat channel for wire harnesses to pass through and avoiding wear or short circuit hazards caused by messy wire harness arrangement.

[0049] The wiring hole mounting component includes a wiring hole plug 3 and a wiring hole clip 4, which can be installed in the wiring hole as needed: unused wiring holes are sealed with the wiring hole plug 3 to prevent moisture from seeping in from empty holes and ensure the overall sealing of the junction box; wiring holes that need to be threaded with wire harnesses are fixed with the wiring hole clip 4 to prevent the wire harness from shaking and rubbing during vehicle operation and to protect the wire harness insulation layer; and the wiring hole mounting component is provided with a limiting structure for positioning and fixing between it and the mounting plate 2 and the top cover 1, so that the clamping and fixing can be achieved without additional tools, which simplifies the on-site assembly and subsequent disassembly and maintenance process, and prevents the wiring hole plug 3 and the wiring hole clip 4 from falling off due to vibration, ensuring long-term stability.

[0050] In some embodiments, such as Figure 4 , Figure 5 As shown, a mounting plate sealing sponge 28 is provided between the back of the mounting plate 2 and the contact surface of the front bulkhead sheet metal 5. The mounting plate sealing sponge 28 is arranged in a ring along the back edge of the mounting plate 2. The ring structure can achieve full circumferential sealing of the contact surface between the mounting plate 2 and the front bulkhead sheet metal 5, effectively preventing external moisture and dust from entering the junction box from the gap between the two, and further strengthening the sealing and protection effect between the junction box and the vehicle body structure.

[0051] Meanwhile, the connector mounting area 23 on the mounting plate 2 adopts a crisscross grid structure design, which forms multiple connector mounting ports with the same structural size through the grid separation. The uniform size of the mounting ports can not only adapt to different specifications of cab-side and chassis-side wiring harness connectors, but also flexibly select the assembly position of the connectors according to the wiring harness layout requirements, avoiding the adaptation limitations caused by the difference in mounting port size, and improving the flexibility and versatility of connector installation.

[0052] In some embodiments, such as Figure 1 , Figure 2 As shown, the front of the top cover 1 is provided with warning signs, which specifically include a "No Spraying" sign 12 and a "Danger of Electricity" sign 13. The "No Spraying" sign 12 can intuitively remind operators to avoid spraying liquid onto the junction box to prevent moisture from seeping into the interior and causing electrical faults. The "Danger of Electricity" sign 13 can clearly warn of the risk of electric shock when the junction box is energized, guiding personnel to operate in a standardized manner. Together, the two can improve the operational safety of the junction box during use and reduce the risk of equipment damage or safety accidents caused by misoperation.

[0053] In some embodiments, such as Figure 3 , Figure 4 As shown, the sealing structure between the back of the upper cover 1 and the mounting plate 2 is composed of the upper cover sealing strip 17 and the short rib 26, which achieve efficient sealing through structural adaptation.

[0054] The sealing strip 17 is arranged in a U-shape on the back of the top cover 1, while the short rib 26 is correspondingly arranged in a U-shape on the front of the mounting plate 2. The U-shaped contours of both match the edge shapes of the top cover 1 and the mounting plate 2, covering the key sealing areas of their contact surfaces. When the top cover 1 is assembled onto the mounting plate 2, the sealing strip 17 and the short rib 26 form an interference fit. The strip is compressed by the short rib, causing elastic deformation, which fully fills the tiny gap between them, preventing external moisture and dust from entering the junction box from the top. Compared with ordinary flat sealing structures, this U-shaped interference fit design has a wider sealing range and stronger sealing performance, further ensuring the dryness and safety of the electrical components inside the junction box.

[0055] In some embodiments, such as Figure 4 , Figure 6 and Figure 7 As shown, the limiting structure for fixing the wire hole mounting component includes a stepped limiting protrusion 24, a limiting rib 18, and a limiting boss. The three components, through positional adaptation and structural cooperation, achieve precise positioning of the wire hole plug 3 and the wire hole clip 4.

[0056] The stepped limiting protrusion 24 is correspondingly disposed in the first semi-circular groove of the mounting plate 2, the limiting rib 18 is correspondingly disposed in the second semi-circular groove of the upper cover 1, and the limiting boss is integrally formed on the outer peripheral surface of the wire hole plug 3 and the wire hole clip 4, and the positions and dimensions of the three are matched with each other.

[0057] When assembling the wire hole mounting components, the plug limiting boss 31 on the wire hole plug 3 and the wire clamp limiting boss 41 on the wire hole clamp 4 will respectively engage with the stepped limiting protrusion 24 on the mounting plate 2 and the limiting rib 18 on the upper cover 1. Through the mechanical engagement of the protrusion and the boss, the wire hole plug 3 and the wire clamp 4 can be quickly positioned in the wire hole to avoid assembly misalignment. They can also fix the wire hole mounting components to prevent the plug from falling off or the wire clamp from loosening due to vibration during vehicle operation. At the same time, no additional bolts or tools are required, simplifying the assembly and subsequent maintenance process.

[0058] In some embodiments, such as Figure 3 , Figure 4 As shown, to further enhance the sealing and protection effect of the wire passage hole, a circumferential sealing structure is provided inside the wire passage hole. This structure specifically includes an upper cover sealing sponge 16 and a wire passage hole sealing sponge 25, which achieve full circumferential sealing through separate placement and cooperation. The upper cover sealing sponge 16 is correspondingly embedded in the first semi-circular groove of the mounting plate 2, and the wire passage hole sealing sponge 25 is correspondingly embedded in the second semi-circular groove of the upper cover 1. The shape and size of the two sponges are respectively adapted to the curvature and depth of the semi-circular groove, ensuring that they can fit tightly against the groove wall during assembly.

[0059] When the first semicircular groove of the mounting plate 2 mates with the second semicircular groove of the top cover 1 to form a cylindrical wire hole, the sealing sponge 16 of the top cover and the sealing sponge 25 of the wire hole will precisely mate and surround the wire hole mounting component (wire hole plug 3 or wire hole clip 4) to form a complete circumferential seal. Through the elastic fit of the sponge, it can fill the gap between the wire hole mounting component and the wire hole wall, and prevent moisture and dust from entering from the wire harness passage or the gap between the mounting component and the hole wall. Compared with a single sealing structure, the protection range of this double sponge circumferential seal design is more comprehensive, further ensuring the overall waterproof and dustproof performance of the junction box.

[0060] In some embodiments, such as Figure 2 , Figure 4 As shown, the upper cover 1 is provided with several upper cover reinforcing ribs 14 on its side, and the upper cover reinforcing ribs 14 extend along the height direction of the upper cover 1. This structure can enhance the deformation resistance of the upper cover 1 side through the longitudinal support of the ribs, effectively resist the vibration and impact during vehicle operation, prevent the upper cover 1 from warping due to long-term stress, and thus ensure the fit and sealing between the upper cover 1 and the mounting plate 2, and extend the service life of the overall structure.

[0061] Meanwhile, the side of the upper cover 1 is provided with an upper cover recess 15, and the side of the mounting plate 2 is provided with a mounting plate recess 27. The two types of recesses are distributed circumferentially along their respective sides. On the one hand, the amount of material used can be reduced while ensuring structural strength, so as to achieve lightweight design; on the other hand, it can provide convenient gripping points or tool clamping space for the assembly process, so as to facilitate the operator to quickly align and install.

[0062] In some embodiments, such as Figure 4 As shown, a cover plate 29 is provided on the front side of the mounting plate 2. The cover plate 29 is arranged in a U-shape around the side of the mounting plate 2, and the surrounding range is adapted to the position of the connector mounting area 23. When the connector is assembled into the connector mounting area 23 of the mounting plate 2, the cover plate 29 can form a surrounding shield from the side and end of the connector. This structure can not only prevent air conditioning condensate, dust and other debris in the cockpit from falling or splashing directly onto the connector, avoiding poor contact or short circuit faults caused by water ingress and dust accumulation, but also reduce the impact of external foreign objects on the connector during vehicle operation, further protecting the connection stability of the connector and extending its service life.

[0063] In some embodiments, such as Figure 4As shown, there are 5 wire passage holes, and each wire passage hole has the same structural dimensions. The uniform size design ensures that the wire passage hole plug 3 and the wire passage hole clip 4 can be used universally in any wire passage hole without the need for separate adapters for different wire passage holes. At the same time, the setting of 5 wire passage holes can meet the wiring harness connection requirements of different vehicle chassis and cockpits. The use or blocking can be flexibly selected according to the actual number of cables, which greatly improves the scenario adaptability of the junction box and reduces the customization costs for different vehicle models.

[0064] Finally, in a second aspect, this utility model also provides a new energy commercial vehicle, wherein the front firewall of the new energy commercial vehicle is equipped with the commercial vehicle front firewall junction box described in the above embodiments. By integrating the junction box, which has the characteristics of stable assembly, efficient sealing and flexible adaptation, into the vehicle, it can not only meet the electrical connection requirements between the driver's cab and the chassis side of the new energy commercial vehicle, ensuring the neatness of the wiring harness and electrical safety, but also adapt to the wiring harness schemes of different configurations of the new energy commercial vehicle due to the universal adaptability of the junction box, providing reliable support for the stable operation of the vehicle's overall electrical system.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A junction box for a commercial vehicle's front firewall, characterized in that, include: Mounting plate (2) is fixed to the mounting surface of front sheet metal (5) by screwing. The lower front end of the mounting plate (2) is provided with multiple first semi-circular grooves. The mounting plate (2) is provided with studs (21) and connector mounting area (23). The studs (21) include grounding studs and power studs. Anti-loss rubber insulating caps are installed on the inner and outer sides of each stud. The top cover (1) is installed on the mounting plate (2). The front of the top cover (1) is provided with a warning sign, and the back is provided with a sealing structure between the top cover (1) and the mounting plate (2). The lower back of the top cover (1) is provided with multiple second semi-circular grooves. The second semi-circular grooves cooperate with the first semi-circular grooves of the mounting plate (2) to form a cylindrical wire hole. The wire hole mounting component includes a wire hole plug (3) and a wire hole clip (4), which are respectively installed in the wire hole. The wire hole mounting component is provided with a positioning and fixing limit structure between the mounting plate (2) and the top cover (1).

2. The junction box for a commercial vehicle front firewall according to claim 1, characterized in that, A mounting plate sealing sponge (28) is provided between the back of the mounting plate (2) and the front sheet metal (5), and the mounting plate sealing sponge (28) is arranged in a ring on the back of the mounting plate (2); The connector installation area (23) forms multiple connector installation ports with the same structural size through a crisscrossing grid structure.

3. The junction box for a commercial vehicle front firewall according to claim 1, characterized in that, The warning signs include a no-spray sign (12) and a hazard sign (13), both of which are located on the front of the top cover (1).

4. A junction box for a commercial vehicle front firewall according to claim 1, characterized in that, The sealing structure between the back of the top cover (1) and the mounting plate (2) includes a top cover sealing strip (17) and a short rib (26); The sealing strip (17) of the upper cover is arranged in a U-shape on the back of the upper cover (1), and the short rib (26) is arranged in a U-shape on the front of the mounting plate (2); when the upper cover (1) is assembled on the mounting plate (2), the sealing strip (17) of the upper cover and the short rib (26) form an interference fit.

5. A junction box for a commercial vehicle front firewall according to claim 1, characterized in that, The limiting structure includes a stepped limiting protrusion (24), a limiting rib (18), and a limiting boss; The stepped limiting protrusion (24) is disposed in the first semicircular groove of the mounting plate (2), the limiting rib (18) is disposed in the second semicircular groove of the upper cover (1), and the limiting boss is disposed on the wire hole plug (3) and the wire hole clip (4) respectively. The limiting boss is used to engage with the stepped limiting protrusion (24) and the limiting rib (18) respectively during assembly to realize the positioning and fixing of the wire hole plug (3) and the wire hole clip (4) in the wire hole.

6. A junction box for a commercial vehicle front firewall according to claim 1, characterized in that, The wire hole is provided with a circumferential sealing structure, which includes an upper cover sealing sponge (16) and a wire hole sealing sponge (25). The upper cover sealing sponge (16) is disposed in the first semicircular groove of the mounting plate (2), and the wire hole sealing sponge (25) is disposed in the second semicircular groove of the upper cover (1). When the first semicircular groove and the second semicircular groove cooperate to form a cylindrical wire hole, the upper cover sealing sponge (16) and the wire hole sealing sponge (25) cooperate to form a circumferential seal around the wire hole mounting component.

7. A junction box for a commercial vehicle front firewall according to claim 1, characterized in that, The upper cover (1) is provided with a plurality of upper cover reinforcing ribs (14) on its side, and the upper cover reinforcing ribs (14) extend along the height direction of the upper cover (1); The side of the top cover (1) and the side of the mounting plate (2) are respectively provided with a number of recessed platforms, which are distributed at intervals along the circumferential direction of the side.

8. A junction box for a commercial vehicle front firewall according to claim 1, characterized in that, The mounting plate (2) has a cover plate (29) on the front side. The cover plate (29) is arranged in a U-shape around the side of the mounting plate (2) to protect the assembled connector.

9. A junction box for a commercial vehicle front firewall according to claim 1, characterized in that, There are 5 wire guide holes, and each wire guide hole has the same structural dimensions.

10. A new energy commercial vehicle, characterized in that, The new energy commercial vehicle is equipped with a junction box for the front firewall of a commercial vehicle as described in any one of claims 1-9.

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