Lightweight high-voltage distribution box frame

Abstract

A lightweight high-voltage distribution box frame provided by the present invention comprises a main body frame, a battery frame and a bottom frame, the battery frame is detachably installed on the upper surface of the main body frame, the two sides of the main body frame are respectively connected with U-shaped suspension arms, the surfaces of the two U-shaped suspension arms are respectively provided with a first connecting hole and a second connecting hole, the second connecting hole is attached to a connecting plate, and the bottom frame is detachably installed on the main body frame. And connecting bolts are in threaded connection in the connecting plates. The skin PPGF material is used for replacing an existing steel or aluminum alloy skin of the heavy truck, the weight of the skin is reduced through the low-density characteristic of PPGF, and the problem that the weight of the skin of the heavy truck is difficult to achieve due to the large material density can be solved; the inner edge closing support assists in skin leveling, installation deformation of a plate material is avoided, the skin PPGF material is easy to shape, a high-cost modeling mold is not needed, and the problems that a frame has no skin leveling capacity, a plate is easy to deform or modeling reinforcement needs a high-cost mold can be solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of high-voltage distribution boxes, in particular to a lightweight high-voltage distribution box frame. BACKGROUND

[0002] With the rapid development of the new energy automobile industry, the demand for weight reduction and endurance improvement of the whole vehicle is increasingly urgent, the weight optimization of the high-voltage distribution box, as a core part of the high-voltage power distribution system of the new energy automobile, directly affects the energy consumption and endurance performance of the whole vehicle, therefore, the lightweight design of the high-voltage distribution box frame becomes an important direction of the industry research and development.

[0003] A lightweight high-voltage distribution cabinet disclosed in a state authorized patent with the announcement number CN219959888U comprises a main cabinet body, an air inlet bin, a partition plate and a fixing frame, the inside of the main cabinet body is uniformly provided with the partition plates at equal distances, the main cabinet body and the partition plates are fixedly connected, the inside of the bottom end of the main cabinet body is provided with an empty bin, the inside of the top end of the empty bin is provided with rotary motors on both sides, and the output shaft end of the rotary motor is provided with a threaded rod. The air inlet bin and the empty bin are arranged in the inside of the main cabinet body, which can effectively realize the lightweight treatment of the whole main cabinet body, and when the rotary motors at the top end of the inside of the empty bin are started, the threaded rod can be driven to rotate in the inside of the threaded cylinder, and the threaded cylinder drives the moving wheels at the bottom end of the movable plate to extend from the inside of the bottom end of the main cabinet body, so that the main cabinet body can be quickly moved.

[0004] However, the current lightweight high-voltage distribution cabinet still has the following defects:

[0005] It is common in new energy commercial vehicles (such as heavy trucks) or passenger cars, and most of the heavy trucks on the market are made of steel or aluminum alloy skin, which has a large material density and is difficult to realize lightweight. At the same time, the frame has no skin leveling ability, and the use of flat plate materials is prone to installation deformation, and the modeling and rigidity need to invest molds, which has a high cost. SUMMARY

[0006] The application provides a lightweight high-voltage distribution box frame to solve the problems in the background art.

[0007] The specific technical scheme is as follows:

[0008] The utility model provides a kind of light weight high-voltage distribution box frame, comprising: main body frame, battery frame and bottom frame, the battery frame is detachably mounted on the upper surface of main body frame, the both sides of main body frame are respectively connected with U type suspension arm, the surface of two U type suspension arms is equipped with first connecting hole and second connecting hole respectively, the second connecting hole is attached with connecting plate, connecting bolt is threadedly connected in the connecting plate, the other end of connecting plate is fixedly connected with high-voltage distribution box body, the surface of bottom frame is equipped with fixed hole, the first connecting hole of two U type suspension arms is respectively connected with first connecting support and second connecting support by bolt, the other end of first connecting support and second connecting support is connected in the fixed hole of bottom frame, two adjacent vertical rods of bottom frame are respectively equipped with a connecting lug, the connecting lug is connected with light weight component by screw, one end of bottom frame is equipped with door plate.

[0009] As a preferred scheme of the utility model, the light weight component includes an inner edge support, the both ends of the inner edge support are detachably connected to one end of the connecting lug by bolts, one side of the inner edge support is attached with a skin, and multiple skins are attached to the surface of the bottom frame.

[0010] As a preferred scheme of the utility model, the skin and the surface of the bottom frame are provided with coaxial threaded holes, and a fixing bolt is threadedly connected in the threaded hole. The skin is used to beautify the appearance and prevent the wire harness from being exposed. The skin is made of PPGF material.

[0011] As a preferred scheme of the utility model, the both sides of the inner wall of the bottom frame are respectively provided with positioning plates, and the positioning plates are used to position and support the high-voltage distribution box body.

[0012] As a preferred scheme of the utility model, a reinforcing rod is installed in the center of the battery frame, the reinforcing rod is in the shape of X, each end of the reinforcing rod is connected to the inner wall of the center of the battery frame, and a butt plate is installed at each corner of the lower surface of the battery frame. The four butt plates are respectively aligned with the corresponding sides of the two U-shaped suspension arms and are fastened by bolts.

[0013] As a preferred scheme of the utility model, one side of the battery frame is provided with an interface connecting seat, the interface connecting seat is used to realize the butt joint of the battery frame with external high-voltage wire harness and signal wire harness, and connecting barrels are installed at both ends of the upper surface of the battery frame.

[0014] As a preferred scheme of the utility model, a door hinge is connected to one end of the door plate through a core-pulling rivet, the other end of the door hinge is connected to one side of the skin, a lock catch is provided on one side of the door plate, the lock catch cooperates with the skin to realize the locking of the door plate, an inner door frame is provided on the inner side of the door plate, a fastening rivet is inserted into one side of the surface of the door plate, and the fastening rivet is used to rivet and fix the door plate and the inner door frame.

[0015] As a preferred embodiment of the present invention, a reinforcing rib is installed on one side of the first connecting bracket, and a reinforcing rib is installed on one side of the second connecting bracket.

[0016] As a preferred embodiment of the present invention, the surface of the skin away from the bottom frame is integrally formed with an anti-slip texture. The anti-slip texture is in the form of a continuous grid or a 45° diagonal pattern, and the depth of the anti-slip texture is 0.3-0.8mm. This is used to improve the anti-slip performance and scratch resistance of the skin surface, while also enhancing the visual layering of the skin appearance.

[0017] As a preferred embodiment of the present invention, a buffer pad is attached to the side of the positioning plate facing the high-voltage distribution box with environmentally friendly adhesive. The buffer pad has a thickness of 1-2mm and is made of aging-resistant rubber or high-elasticity polyurethane. The side of the buffer pad away from the positioning plate is in close contact with the bottom of the high-voltage distribution box to buffer the vibration generated when the high-voltage distribution box is working, and to avoid surface wear or vibration transmission caused by rigid contact between the positioning plate and the high-voltage distribution box.

[0018] The present invention has the following beneficial effects:

[0019] 1. The lightweight high-voltage distribution box frame provided by this invention integrates components such as the high-voltage distribution box body and battery frame based on the main frame, reducing redundant structures. The skin of the lightweight components uses PPGF material to replace traditional steel or aluminum alloy materials, reducing density and achieving lightweighting. The inner edge bracket assists in leveling the skin, avoiding deformation of the flat material during installation. Moreover, the PPGF skin is easy to shape without the need for additional high-cost molding molds, solving the problems of high density and difficulty in lightweighting of the skin material of heavy truck high-voltage distribution box frames, as well as the lack of leveling ability of the frame, easy deformation of the flat plate, or the need for high-cost molding molds. At the same time, the inner edge bracket transmits the pressure and vibration borne by the skin, the X-shaped reinforcing rod enhances the torsional resistance of the battery frame, and the positioning plate improves the overall stability, ensuring structural reliability.

[0020] 2. The lightweight high-voltage distribution box frame provided by the present invention achieves stable opening and closing and locking of the door panel through door hinges and latches, and fastening rivets connect the door panel and the inner frame of the door to enhance the strength of the door panel and avoid deformation after long-term use; the reinforcing ribs of the first connecting bracket and the reinforcing ribs of the second connecting bracket improve the bending resistance and prevent load-bearing deformation, solve the problems of easy deformation and unstable connection of frame components, and ensure the reliability of the overall structure for long-term use. Attached Figure Description

[0021] Figure 1 A schematic diagram of the main frame structure of the lightweight high-voltage distribution box frame provided in an embodiment of the present invention;

[0022] Figure 2A schematic diagram of the lightweight component structure of the lightweight high-voltage distribution box frame provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the skin structure of the lightweight high-voltage distribution box frame provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the frame assembly structure of the lightweight high-voltage distribution box frame provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection bracket structure of the lightweight high-voltage distribution box frame provided in an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the skin texture structure of the lightweight high-voltage distribution box frame provided in an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the charging port door structure of the lightweight high-voltage distribution box frame provided in an embodiment of the present invention.

[0028] In the attached image:

[0029] 1. Main frame; 101. First connecting hole; 102. Second connecting hole; 103. U-shaped boom;

[0030] 2. High-voltage distribution box; 201. Connecting plate; 202. Connecting bolts;

[0031] 3. First connecting bracket; 31. Reinforcing rib; 301. Second connecting bracket; 3011. Reinforcing rib;

[0032] 4. Lightweight components; 401. Inner edge support; 402. Skin; 403. Connecting bolts;

[0033] 5. Bottom frame; 501. Connecting hole; 502. Positioning plate; 503. Connecting lug;

[0034] 6. Door panel; 601. Door hinge; 602. Lock; 603. Fastening rivets; 604. Inner door frame;

[0035] 7. Battery frame; 701. Reinforcing rod; 702. Connecting plate; 703. Interface connector; 704. Connecting cylinder. Detailed Implementation

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0038] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Example 1

[0041] The lightweight high-voltage distribution box frame provided in this embodiment, such as Figures 1-7As shown, it includes: a main frame 1, a battery frame 7, and a bottom frame 5. The battery frame 7 is detachably installed on the upper surface of the main frame 1. U-shaped booms 103 are connected to both sides of the main frame 1. The surfaces of the two U-shaped booms 103 are respectively provided with a first connecting hole 101 and a second connecting hole 102. A connecting plate 201 is attached to the second connecting hole 102. A connecting bolt 202 is connected to the internal thread of the connecting plate 201. A high-voltage distribution box 2 is fixedly connected to the other end of the connecting plate 201. A connecting hole 501 is provided on the surface of the bottom frame 5. The first connecting holes 101 of the two U-shaped booms 103 are respectively connected to a first connecting bracket 3 and a second connecting bracket 301 by bolts. The other ends of the first connecting bracket 3 and the second connecting bracket 301 are connected to the connecting hole 501 provided in the bottom frame 5 by another bolt. A connecting ear 503 is provided on each of the two adjacent vertical bars of the bottom frame 5. A lightweight component 4 is connected to the connecting ear 503 by screws. A door panel 6 is provided on one end of the bottom frame 5. The lightweight component 4 includes an inner edge bracket 401, with both ends of the inner edge bracket 401 detachably connected to one end of a connecting ear 503 via bolts. A skin 402 is attached to one side of the inner edge bracket 401, and multiple skins 402 are attached to the surface of the bottom frame 5. The skin 402 and the surface of the bottom frame 5 have coaxial threaded holes, with connecting bolts 403 threaded into the threaded holes. The skin 402 is used to improve the appearance and prevent wire harness exposure, and is made of PPGF material. Positioning plates 502 are installed on both sides of the inner wall of the bottom frame 5, and the positioning plates 502 are used to position and support the high-voltage distribution box 2. A reinforcing rod 701 is installed in the center of the battery frame 7. The reinforcing rod 701 is X-shaped, and each end of the reinforcing rod 701 is connected to the inner wall of the center of the battery frame 7. A mating plate 702 is installed at each of the four corners of the lower surface of the battery frame 7. The four mating plates 702 are aligned with the corresponding sides of the two U-shaped booms 103 and tightened with bolts. The battery frame 7 has an interface connector 703 on one side. The interface connector 703 is used to connect the battery frame 7 with external high-voltage wire harnesses and signal wire harnesses. Connecting cylinders 704 are installed at both ends of the upper surface of the battery frame 7.

[0042] Through the design of the battery frame 7, U-shaped boom 103, high-voltage distribution box 2, and lightweight components 4, the main frame 1 serves as the foundation. The high-voltage distribution box 2 is fixed to the U-shaped boom 103 by connecting bolts 202 inserted into the connecting plates 201 installed on both sides, completing the assembly of the high-voltage distribution box 2 and the main frame 1. Then, the first connecting bracket 3 and the second connecting bracket 301 are connected to the first connecting hole 101 by bolts. Then, the other end of the first connecting bracket 3 and the second connecting bracket 301 is connected to the connecting hole 501 of the bottom frame 5, realizing the connection between the main frame 1 and the bottom frame 5. Finally, the mating plate 702 on the lower surface of the battery frame 7 is aligned with the first connecting hole 101 on the other side of the U-shaped boom 103 and tightened by bolts. The battery frame 7 is fixed to the main frame 1. Then, the inner edge bracket 401 is connected to the connecting ear 503 of the bottom frame 5 with screws. After the skin 402 is attached, it is fixed with the connecting bolt 403 through the threaded hole. The pressure and vibration external force borne by the skin 402 will be transmitted to the rigid base of the bottom frame 5 through the inner edge bracket 401, avoiding stress concentration in the skin 402 and causing deformation. The positioning plate 502 is attached to the bottom of the high voltage distribution box 2 to complete the positioning, thereby improving the overall structural stability. The skin 402 is made of PPGF material, which can reduce the weight of the frame, while covering the wire harness to avoid exposure and beautify the appearance. The X-shaped reinforcing rod 701 inside the battery frame 7 enhances its torsional resistance. The interface connector 703 improves the convenience of external wire harness docking.

[0043] Example 2

[0044] The lightweight high-voltage distribution box frame provided in this embodiment, such as Figures 1-7 As shown, the device includes: a door panel 6 with one end connected to a door hinge 601 via a pull rivet; the other end of the door hinge 601 connected to one side of a skin 402; a latch 602 on one side of the door panel 6, which engages with the skin 402 to lock the door panel 6; an inner frame 604 on the inner side of the door panel 6; and fastening rivets 603 inserted into one side of the surface of the door panel 6 to rivet and fix the door panel 6 to the inner frame 604. A reinforcing rib 31 is installed on one side of the first connecting bracket 3, and a reinforcing rib 3011 is installed on one side of the second connecting bracket 301.

[0045] Through the design of door hinge 601, fastening rivet 603, and first connecting bracket 3, door hinge 601 is fixed to one end of door panel 6 by pull rivet, and the other end of door hinge 601 is connected to skin 402, which realizes the opening and closing function of door panel 6. Then, the latch 602 cooperates with skin 402 to lock door panel 6 after it is closed, preventing door panel 6 from loosening. Then, fastening rivet 603 is passed through door panel 6 and inner frame 604 to realize the riveting and fixing of the two, thereby enhancing the structural strength of door panel 6 and preventing deformation of door panel 6 after long-term use. The first connecting bracket 3 has a reinforcing rib 31 installed on one side, and the second connecting bracket 301 has a reinforcing rib 3011 installed on one side, which can improve the bending resistance of the two connecting brackets, prevent the brackets from deforming when bearing load, and ensure the connection stability between the main frame 1 and the bottom frame 5.

[0046] Specifically, in this embodiment, the surface of the skin 402 away from the bottom frame 5 is integrally formed with an anti-slip texture. The anti-slip texture is in the form of a continuous grid or a 45° diagonal pattern, and the depth of the anti-slip texture is 0.3-0.8mm. It is used to improve the anti-slip performance and scratch resistance of the skin 402 surface, while enhancing the visual layering of the skin 402 appearance.

[0047] Specifically, in this embodiment, a buffer pad is attached to the side of the positioning plate 502 facing the high-voltage distribution box 2 with environmentally friendly adhesive. The buffer pad is 1-2mm thick and is made of aging-resistant rubber or high-elasticity polyurethane. The side of the buffer pad away from the positioning plate 502 is tightly attached to the bottom of the high-voltage distribution box 2 to buffer the vibration generated when the high-voltage distribution box 2 is working, and to avoid surface wear or vibration transmission caused by rigid contact between the positioning plate 502 and the high-voltage distribution box 2.

[0048] It is worth noting that the charging port door is made of PP material, which requires the door body to be molded. In order to avoid the investment in molds, reduce costs and achieve further weight reduction, the charging port door assembly is formed by connecting the inner frame 604, door panel 6, latch 602 and door hinge 601 with core-pulling rivets. This can avoid the investment in new molds and also take into account the aesthetics.

[0049] In summary, the lightweight high-voltage distribution box frame provided in this embodiment has the following advantages: by replacing the existing steel or aluminum alloy materials of heavy truck skin with 402PPGF material, the weight of the skin is reduced by utilizing the low density characteristics of PPGF, which avoids the problem that it is difficult to achieve lightweighting of heavy truck skin due to the high material density; the inner edge bracket 401 assists in leveling the skin 402, avoiding deformation of the flat plate material during installation, and the 402PPGF material of the skin is easy to shape without the need for high-cost molding molds, which avoids the problems of the frame lacking the leveling ability of the skin 402, the easy deformation of the flat plate, or the need for high-cost molds for shaping reinforcement.

[0050] In use, the main frame 1 serves as the core foundation. The high-voltage distribution box 2 is fixed to the U-shaped boom 103 via connecting plate 201 and connecting bolt 202. The battery frame 7 is aligned with one side of the U-shaped boom 103 via docking plate 702 and fastened to the main frame 1 via bolts. The bottom frame 5 is connected to the main frame 1 via the first connecting bracket 3 and the second connecting bracket 301 to form the main load-bearing structure. The lightweight component 4 provides the mounting base for the skin 402 via the inner edge bracket 401, so that the external force on the skin 402 is transferred to the rigid base of the bottom frame 5 to avoid stress concentration. The X-shaped reinforcing rod 701 inside the battery frame 7 enhances the torsional resistance. The reinforcing rib 31 and reinforcing bar 3011 of the first connecting bracket 3 improve the bending resistance. The PPGF material skin 402 achieves lightweighting. The door panel 6 achieves the opening and closing function via door hinge 601 and latch 602.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightweight high-voltage distribution box frame, characterized in that, include: The main frame (1), battery frame (7), and bottom frame (5) are provided. The battery frame (7) is detachably installed on the upper surface of the main frame (1). U-shaped booms (103) are connected to both sides of the main frame (1). The surfaces of the two U-shaped booms (103) are respectively provided with a first connecting hole (101) and a second connecting hole (102). A connecting plate (201) is attached to the second connecting hole (102). A connecting bolt (202) is threaded into the connecting plate (201). A high-voltage distribution box (2) is fixedly connected to the other end of the connecting plate (201). The bottom frame (5) 5) The surface is provided with a connecting hole (501). The first connecting hole (101) of the two U-shaped booms (103) is respectively connected to the first connecting bracket (3) and the second connecting bracket (301) by bolts. The other end of the first connecting bracket (3) and the second connecting bracket (301) is connected to the connecting hole (501) provided in the bottom frame (5) by another bolt. The bottom frame (5) has a connecting ear (503) on each of the two adjacent vertical rods. The connecting ear (503) is connected to a lightweight component (4) by screws. The bottom frame (5) has a door panel (6) on one end.

2. The lightweight high-voltage distribution box frame according to claim 1, characterized in that, The lightweight component (4) includes an inner edge bracket (401), both ends of which are detachably connected to one end of a connecting ear (503) by bolts. A skin (402) is attached to one side of the inner edge bracket (401), and multiple skins (402) are attached to the surface of the bottom frame (5).

3. The lightweight high-voltage distribution box frame according to claim 2, characterized in that, The skin (402) and the bottom frame (5) are provided with coaxial threaded holes, and the threaded holes are connected with connecting bolts (403). The skin (402) is used to beautify the appearance and prevent wire harnesses from being exposed. The skin (402) is made of PPGF material.

4. The lightweight high-voltage distribution box frame according to claim 1, characterized in that, Positioning plates (502) are installed on both sides of the inner wall of the bottom frame (5), and the positioning plates (502) are used to position and support the high voltage distribution box (2).

5. The lightweight high-voltage distribution box frame according to claim 1, characterized in that, A reinforcing rod (701) is installed in the center of the battery frame (7). The reinforcing rod (701) is X-shaped. Each end of the reinforcing rod (701) is connected to the inner wall of the center of the battery frame (7). A docking plate (702) is installed at each of the four corners of the lower surface of the battery frame (7). The four docking plates (702) are aligned with the corresponding sides of the two U-shaped booms (103) and tightened with bolts.

6. The lightweight high-voltage distribution box frame according to claim 5, characterized in that, The battery frame (7) is provided with an interface connector (703) on one side. The interface connector (703) is used to connect the battery frame (7) with external high-voltage wire harnesses and signal wire harnesses. Connecting cylinders (704) are respectively installed at both ends of the upper surface of the battery frame (7).

7. The lightweight high-voltage distribution box frame according to claim 1, characterized in that, One end of the door panel (6) is connected to a door hinge (601) by a pull rivet, and the other end of the door hinge (601) is connected to one side of the skin (402). A latch (602) is provided on one side of the door panel (6). The latch (602) cooperates with the skin (402) to lock the door panel (6). An inner frame (604) is provided on the inner side of the door panel (6). A fastening rivet (603) is inserted into one side of the surface of the door panel (6). The fastening rivet (603) is used to rivet and fix the door panel (6) to the inner frame (604).

8. The lightweight high-voltage distribution box frame according to claim 1, characterized in that, The first connecting bracket (3) has a reinforcing rib (31) installed on one side, and the second connecting bracket (301) has a reinforcing rib (3011) installed on one side.

9. The lightweight high-voltage distribution box frame according to claim 3, characterized in that, The skin (402) has an integrally formed anti-slip texture on the side away from the bottom frame (5). The anti-slip texture is a continuous grid or a 45° diagonal pattern. The depth of the anti-slip texture is 0.3-0.8mm. It is used to improve the anti-slip performance and scratch resistance of the skin (402) surface, and at the same time enhance the visual layering of the skin (402) appearance.

10. The lightweight high-voltage distribution box frame according to claim 4, characterized in that, The side of the positioning plate (502) facing the high-voltage distribution box (2) is covered with a buffer pad by environmentally friendly adhesive. The buffer pad is 1-2mm thick and is made of aging-resistant rubber or high-elasticity polyurethane. The side of the buffer pad away from the positioning plate (502) is in close contact with the bottom of the high-voltage distribution box (2) to buffer the vibration generated when the high-voltage distribution box (2) is working, and to avoid surface wear or vibration transmission caused by rigid contact between the positioning plate (502) and the high-voltage distribution box (2).

Images