Modularized assembly structure of direct current charging pile of electric vehicle

Abstract

The invention discloses an electric vehicle direct current charging pile modular assembly structure which comprises a box body with a box door, heat dissipation openings are formed in the two sides of the box body, and a basic rectangular connecting frame composed of transverse connecting rods and vertical connecting rods is arranged on the outer sides of the heat dissipation openings. An extending rectangular connecting frame is detachably installed on the outer side of the foundation frame, an annular installation frame is arranged, and the installation frame can be directly arranged on the outer side of the foundation frame in a sleeving mode or indirectly connected through an extending frame. A plurality of layers of transverse connecting frames are arranged in the box body, and the two ends of the transverse connecting frames are connected with the corresponding layers of the left and right mounting frames respectively. More than two fans are mounted on the outer side of the mounting rack, filter screen frames with filter screens are arranged on the outer side of the mounting rack in a layered manner, and a detachable dustproof cover covers the outermost layer. According to the device, the accommodating volume of the charging pile can be rapidly changed through a modular installation mode, the requirement that a new charging module is reasonably filled into an old charging pile can be met, normal work of a heat dissipation system can be guaranteed, and the upgrading and reconstruction cost of the old direct current charging pile is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a modular assembly structure of a DC charging pile for an electric vehicle. Background Art

[0002] The DC charging pile for electric vehicles is a fast charging device that directly provides DC power to the power battery of electric vehicles. Its working principle is to convert three-phase AC power (380V) into adjustable DC power through the internal rectifier and power conversion module to directly charge the battery. The power range is usually between 60kW and 350kW, and the power can be charged to 80% in 30 minutes at the fastest. The core components include charging module (power conversion), control system (charging timing management), heat dissipation system and safety protection device (overvoltage / overcurrent protection).

[0003] Due to the charging module, the overall cost of charging piles adapted to 800V and above high voltage is much higher than that of low voltage charging piles. At present, most electric vehicles on the market are still mainly charged at low voltage, so the current promotion rate of low voltage DC charging piles is better than that of high voltage DC charging piles. However, with the advancement of technology and the expected future price of charging modules, high voltage charging piles have the trend of replacing low voltage charging piles.

[0004] When adapting to high-voltage models of 800V and above, existing low-voltage DC charging piles face the upgrade problem of incompatible charging module volumes. The new charging module must be different in volume from the old charging module, which means that when replacing the old DC charging pile with a new charging module, the fixed size inside the old charging pile cannot fill a sufficient number of new charging modules as needed or cannot reasonably arrange the new charging modules, which can easily lead to the incompatibility of the old cooling system.

[0005] In view of this, a modular assembly structure of a DC charging pile for electric vehicles is designed, which can quickly change the accommodation volume of the charging pile through a modular installation method, so as to upgrade the old DC charging pile with a new charging module. Summary of the invention

[0006] The purpose of the present invention is to provide a modular assembly structure of a DC charging pile for electric vehicles, which can quickly change the capacity of the charging pile through a modular installation method, so as to meet the demand of reasonably filling the new charging module into the old charging pile and ensure the normal operation of the heat dissipation system, so as to reduce the cost of upgrading and transforming the old DC charging pile.

[0007] The technical solution of the present invention is achieved in this way:

[0008] A modular assembly structure of a DC charging pile for an electric vehicle comprises a box body with a box door at the front end, and heat dissipation ports are respectively opened on the left and right side walls of the box body, and horizontal connecting rods are respectively fixed on the outer side walls of the box body at the upper and lower ends of the heat dissipation ports, and vertical connecting rods are respectively fixed on the outer side walls of the box body at the left and right ends of the heat dissipation ports, and the horizontal connecting rods and the vertical connecting rods are not connected to each other, and the horizontal connecting rods and the vertical connecting rods are combined to form a basic rectangular connection frame, and at least one extended rectangular connection frame is detachably installed on the side of the basic rectangular connection frame away from the box body, and a circular rectangular installation frame is also provided on the side of the basic rectangular connection frame away from the box body, and the installation frame can be selectively directly installed on the basic rectangular connection frame, and at this time, the installation frame can be detachably installed outside the basic rectangular connection frame, or the installation frame can be selectively installed through the The extended rectangular connecting frame is indirectly installed on the basic rectangular connecting frame, and at this time, the installation frame is detachably mounted outside the extended rectangular connecting frame, and multiple installation frames are detachably installed in the installation frame, and multiple installation frames are arranged from top to bottom. At least two layers of connecting frames are also arranged in layers from top to bottom in the box body, and each layer of connecting frames includes at least one horizontal connecting frame, and the two ends of the connecting frame are respectively detachably connected to the installation frame in the left installation frame and the installation frame in the right installation frame. At least two fans are detachably installed on the side of the installation frame away from the box body, and multiple filter frames covered with filters are detachably installed in the installation frame, and multiple filter frames are arranged from top to bottom. The filter frames are arranged on the side of the fan away from the box body, and the side of the box body away from the installation frame is detachably covered with a dust cover.

[0009] When using the above solution, when the box is initially designed, the size of the box is designed based on the original size of the charging module. The heat dissipation port of the box does not need to be connected to the extended rectangular connection frame, but is directly connected to the mounting frame and the components on the mounting frame. The charging module is directly arranged and installed on the connecting frame. The setting of the fan, filter frame and dust cover is conducive to the formation of effective air convection and air cooling. During normal maintenance, maintenance personnel can quickly remove the dust cover and remove the filter frame for replacement or cleaning. When there is a problem with the fan, the fan can also be quickly replaced without adjusting the various structures inside the box.

[0010] When the charging module needs to be updated, the size and layout of the new charging module are calculated. First, the old charging module is taken out from the box door, and then the components on the installation frame are removed from the outside to the inside. The extended rectangular connection frame of the appropriate length is selected and installed on the basic rectangular connection frame. Then the original installation frame or the installation frame of the new size is installed on the extended rectangular connection frame. According to the new structural layout, the height of the mounting frame is adjusted up and down to adjust the appropriate layer height, and then a new longer connecting frame is replaced. After the new connecting frame is installed on the mounting frame, the structural layout inside the box has been changed. Not only the horizontal space is expanded, but also the layer height between the connecting frames is adjusted to match the new charging module size, so that the new charging module can be fully placed in the box, and a reasonable layout structure can be taken into account. At the same time, under the new structural layout, a fan with a larger power or a larger size is replaced according to the heat dissipation requirements of the new charging module. The mounting frame under this assembly structure is convenient for adjusting the position or replacing the mounting frame of a new size, so that the new fan is also easier to arrange in the mounting frame to ensure the normal operation of the heat dissipation system.

[0011] A further technical solution is that a first vertical slot is vertically opened at the top of the vertical connecting rod, and the bottom of the first vertical slot is not connected to the bottom of the vertical connecting rod. The first vertical slot is connected to the side of the vertical connecting rod away from the box body to form a first vertical side opening, and the inner cavity width of the first vertical slot is greater than the width of the first vertical side opening. The left end face or the right end face of the transverse connecting rod is also horizontally opened to the other end with a first transverse slot that is not connected to the other side, and the first transverse slot is connected to the side of the transverse connecting rod away from the box body to form a first transverse side opening, and the inner cavity width of the first transverse slot is greater than the width of the first transverse side opening. The extended rectangular connecting frame includes two transverse extension plates respectively arranged up and down and two vertical extension plates respectively arranged left and right. The transverse connecting plate and the vertical connecting plate are not connected to each other, and the transverse extension plate is provided with a first transverse slot for slidingly inserting into the side of the box body. The cam is an assembly of a plurality of extension plates, each of which is adapted to extend the length of the extension plates and a plurality of extension plates extending along the length of the extension plates. The extension plates are adapted to extend the length of the extension plates and a plurality of extension plates extending along the length of the extension plates.

[0012] When using the above solution, through the standardized coordination of the first vertical slot, the first horizontal slot, the vertical insert, the horizontal insert, the second vertical slot and the second horizontal slot, it is not only convenient to install and disassemble, but also has a simple structure and is easy to produce, and is relatively stable after installation. By setting the inner cavity width of the slot to be larger than the width of the opening, the strip can be effectively restricted from falling out. Due to the simple structure, in the subsequent update process, the manufacturer can customize the width of the horizontal extension plate and the vertical extension plate according to the actual size of the new charging module, avoiding backlogs and reducing update costs.

[0013] A further technical solution is that two vertical first perforated plates are fixedly provided inside the installation frame, the top of the first perforated plates is fixedly connected to the top of the installation frame, and the bottom of the first perforated plates is fixedly connected to the bottom of the installation frame. The two first perforated plates are respectively arranged on the left and right sides of the inside of the installation frame, and the first perforated plates do not abut against the side walls of the installation frame to form a compartment, and the mounting frame is detachably installed between the two first perforated plates.

[0014] When the above solution is used, the first perforated plate is provided, so that the position of the mounting frame can be conveniently adjusted by utilizing the multiple holes on the first perforated plate. The first perforated plate does not abut against the side wall of the mounting frame to form a compartment, which can facilitate the connection of bolts and nuts.

[0015] A further technical solution is that the mounting frame includes two second perforated plates which are parallel to each other and arranged at intervals, and also includes a transverse connecting plate and a bottom connecting plate arranged between the two second perforated plates, the transverse connecting plate is arranged above the bottom connecting plate, the left and right ends of the bottom connecting plate are respectively fixedly connected to the second perforated plates, the left and right ends of the transverse connecting plate are respectively fixedly connected to the second perforated plates, there are at least three transverse connecting plates, the transverse connecting plates are arranged at intervals up and down, the fan is detachably mounted on the transverse connecting plate, the mounting frame is screwed to the first perforated plate through the second perforated plate, and the connecting frame is detachably fixedly connected to the bottom connecting plate.

[0016] When the above solution is used, by providing the second perforated plate in conjunction with the first perforated plate, the applicability of the old mounting frame can be improved, thereby increasing the utilization rate of the old mounting frame to adapt to more installation forms.

[0017] A further technical solution is that the filter frame is detachably connected to the first perforated plate.

[0018] A further technical solution is that the dust cover includes a dust frame and a breathable cover, the breathable cover is a cover plate with multiple breathable holes, the breathable cover is covered in the dust frame to form a dust cover, and the dust cover is detachably mounted on the installation frame through the dust frame.

[0019] A further technical solution is that the connecting frame includes a plurality of plane plates which are parallel to each other and arranged at intervals, and both ends of the plane plates are screwed to the bottom connecting plate.

[0020] When using the above solution, a connecting frame is formed by setting a flat plate with a simple structure, which is not only easy to install, but also convenient for the factory to quickly customize a connecting frame of a new size during subsequent updates, thereby reducing the update cost.

[0021] The beneficial effects of the present invention are:

[0022] 1. Modular and scalable design: By extending the rectangular connection frame, adjustable mounting frame and connection frame, the horizontal space and layer height of the box can be dynamically adjusted to easily adapt to new charging modules of different sizes. The standardized matching of the first / second vertical / horizontal slots and the plug strips simplifies the installation process and supports rapid expansion or replacement of components (such as extension boards) without the need for overall structural modification.

[0023] 2. High component reusability: Through the cooperation of the first perforated plate and the second perforated plate, the compatibility of the old mounting frame is improved, the waste of components is reduced, and the resource utilization rate is improved.

[0024] 3. The cooling system is easy to adjust: it supports replacement of high-power or large-size fans on demand, and flexibly matches the cooling requirements of different charging modules.

[0025] 4. Simplified and low-cost production: Use flat panels to form simple structures such as connecting frames to reduce processing complexity; standardized components (such as perforated plates and slots) are easy to mass produce, reducing customization costs. Extension plates, connecting frames and other components can be flexibly customized according to the size of the new module to avoid stockpiling redundant materials and reduce storage costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the cabinet when the extended rectangular connection frame is not installed;

[0027] Figure 2 for Figure 1 A front view of

[0028] Figure 3 for Figure 1 Schematic diagram when the dust cover is hidden;

[0029] Figure 4 for Figure 3 Schematic diagram when the filter frame is hidden;

[0030] Figure 5 for Figure 4 Schematic diagram when the fan is hidden;

[0031] Figure 6 for Figure 5 The schematic diagram when the mounting frame is hidden;

[0032] Figure 7 for Figure 1Schematic diagram of disassembly of each component;

[0033] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0034] Fig. 9 This is the exploded view when the extended rectangular connection frame is installed on the right side of the box;

[0035] Fig.10 This is a schematic diagram of installing an extended rectangular connection frame on the right side of the box;

[0036] Fig.11 is a three-dimensional schematic diagram of the installation frame;

[0037] Fig.12 is a three-dimensional schematic diagram of the mounting frame;

[0038] Fig.13 A three-dimensional schematic diagram of a dust cover;

[0039] Fig.14 It is a three-dimensional schematic diagram of the vertical extension plate and the horizontal extension plate.

[0040] In the figure, 1, box body, 2, box door, 3, heat dissipation port, 4, connecting frame, 5, mounting frame, 6, dust cover, 601, dust frame, 602, ventilation cover, 7, filter frame, 8, fan, 9, mounting frame, 10, first perforated plate, 11, horizontal connecting rod, 12, first horizontal slot, 13, vertical connecting rod, 14, first vertical slot, 15, horizontal extension plate, 16, vertical extension plate, 17, second perforated plate, 18, bottom connecting plate, 19, horizontal connecting plate, 20, vertical insertion strip, 21, second vertical slot, 22, horizontal insertion strip, 23, second horizontal slot. DETAILED DESCRIPTION

[0041] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0042] See also Figure 1 , Fig. 9 and Fig.10 A modular assembly structure of a DC charging pile for electric vehicles includes a box body 1 with a box door 2 at the front end, and heat dissipation ports 3 are respectively opened on the left and right side walls of the box body 1. Horizontal connecting rods 11 are respectively welded on the outer side walls of the box body 1 at the upper and lower ends of the heat dissipation ports 3, and vertical connecting rods 13 are respectively welded on the outer side walls of the box body 1 at the left and right ends of the heat dissipation ports 3. The horizontal connecting rods 11 and the vertical connecting rods 13 are not connected to each other, and the horizontal connecting rods 11 and the vertical connecting rods 13 are surrounded to form a basic rectangular connection frame.

[0043] Specifically, the horizontal connecting rod 11 and the vertical connecting rod 13 are both rod bodies with rectangular cross sections.

[0044] It should be noted that in order to facilitate the display of the internal structure, Figures 1 to 14 In the structural part of the box body 1, the top of the box body 1 (i.e., the box top) is hidden, the switch door of the box body 1 and the related hinge structure are hidden (only the box door 2 is displayed to indicate the inlet and outlet of the box body 1), and the fan 8 and the filter frame 7 at the heat dissipation port 3 on the left side of the box body 1 are also hidden (in order to more clearly show the connection between the connecting frame 4 and the mounting frame 9).

[0045] It should also be noted that the basic rectangular connection frame mentioned in the present disclosure is not a complete frame with four sides connected in a strict sense, but only describes the arrangement of the horizontal connection rod 11 and the vertical connection rod 13. The extended rectangular connection frame mentioned in the present disclosure is also not a complete frame with four sides connected in a strict sense, but only describes the arrangement of the horizontal extension plate 15 and the vertical extension plate 16.

[0046] At least one extended rectangular connecting frame is detachably installed on the side of the basic rectangular connecting frame facing away from the box body 1. A rectangular mounting frame 5 is also provided on the side of the basic rectangular connecting frame facing away from the box body 1. The mounting frame 5 can be selectively directly installed on the basic rectangular connecting frame. In this case, the mounting frame 5 is detachably mounted outside the basic rectangular connecting frame, or the mounting frame 5 can be selectively indirectly installed on the basic rectangular connecting frame through the extended rectangular connecting frame. In this case, the mounting frame 5 is detachably mounted outside the extended rectangular connecting frame.

[0047] Specifically, threaded holes are formed on the horizontal connecting rod 11 and the vertical connecting rod 13 , and threaded holes are also formed at corresponding positions on the mounting frame 5 . The mounting frame 5 is screwed to the horizontal connecting rod 11 and the vertical connecting rod 13 by bolts.

[0048] See also Figures 1 to 14 Specifically, a first vertical slot 14 is vertically opened downward at the top of the vertical connecting rod 13, the bottom of the first vertical slot 14 is not connected to the bottom of the vertical connecting rod 13, the first vertical slot 14 is connected to the side of the vertical connecting rod 13 away from the box body 1 to form a first vertical side opening, and the inner cavity width of the first vertical slot 14 is greater than the width of the first vertical side opening;

[0049] The left end face or the right end face of the transverse connecting rod 11 is also horizontally opened to the other end with a first transverse slot 12 that is not connected to the other side. The first transverse slot 12 is connected to the side of the transverse connecting rod 11 away from the box body 1 to form a first transverse side opening. The inner cavity width of the first transverse slot 12 is greater than the width of the first transverse side opening.

[0050] Preferably, the first transverse slot 12 is opened from the left end surface of the transverse connecting rod 11 to the right side (ie, from the front end to the rear end of the box body 1).

[0051] Specifically, the extended rectangular connection frame includes two horizontal extension plates 15 respectively arranged up and down and two vertical extension plates 16 respectively arranged left and right, and the horizontal connection plate 19 and the vertical connection plate are not connected to each other. The horizontal extension plate 15 is provided with a horizontal insertion bar 22 for slidingly inserting into the first horizontal slot 12 on the side facing the box body 1. The horizontal extension plate 15 is inserted into the first slot by sliding horizontally from the opening of the first horizontal slot 12 through the horizontal insertion bar 22 until the right end face of the horizontal extension plate 15 is aligned with the right end face of the horizontal connecting rod 11, and when the left end face of the horizontal extension plate 15 is aligned with the left end face of the horizontal connecting rod 11, the horizontal insertion bar 22 can no longer be inserted.

[0052] A vertical insertion bar 20 for slidingly inserting into the first vertical slot 14 is provided on the side of the vertical extension plate 16 facing the box body 1. The vertical extension plate 16 is longitudinally slidably inserted into the first vertical slot 14 from the top opening of the first vertical slot 14 through the vertical insertion bar 20 until the top surface of the vertical extension plate 16 is aligned with the top surface of the vertical connecting rod 13. When the bottom surface of the vertical extension plate 16 is aligned with the bottom surface of the vertical connecting rod 13, the vertical insertion bar 20 can no longer be inserted.

[0053] The left end face or the right end face of the transverse extension plate 15 is also horizontally opened to the other end with a second transverse slot 23 that is not connected to the other side. The second transverse slot 23 is connected to the side of the transverse extension plate 15 away from the box body 1 to form a second transverse side opening. The inner cavity width of the second transverse slot 23 is greater than the width of the second transverse side opening.

[0054] Preferably, the second transverse slot 23 is opened from the left end surface of the transverse extension plate 15 to the right side (ie, from the front end to the rear end of the box body 1).

[0055] A second vertical slot 21 not connected to the bottom of the vertical connecting plate is vertically opened at the top of the vertical connecting plate. The second vertical slot 21 is connected to the side of the vertical connecting plate away from the box body 1 to form a second vertical side opening. The inner cavity width of the second vertical slot 21 is greater than the width of the second vertical side opening.

[0056] When multiple extended rectangular connection frames are connected in sequence, the vertical extension plate 16 of the outer extended rectangular connection frame is connected to the second vertical slot 21 of the vertical extension plate 16 of the inner extended rectangular connection frame through the vertical insertion bar 20, and the horizontal extension plate 15 of the outer extended rectangular connection frame is connected to the second horizontal slot 23 of the horizontal extension plate 15 of the inner extended rectangular connection frame through the horizontal insertion bar 22.

[0057] Similarly, when the top and bottom surfaces of the vertical extension plate 16 of the external extended rectangular connection frame are aligned with the top and bottom surfaces of the vertical extension plate 16 of the internal extended rectangular connection frame, the external vertical insertion strip 20 cannot continue to move in the internal second vertical slot 21. When the left and right surfaces of the horizontal extension plate 15 of the external extended rectangular connection frame are aligned with the left and right surfaces of the horizontal extension plate 15 of the internal extended rectangular connection frame, the external horizontal insertion strip 22 cannot continue to move in the internal second horizontal slot 23.

[0058] A plurality of mounting frames 9 are detachably mounted in the mounting frame 5 , and the plurality of mounting frames 9 are arranged from top to bottom.

[0059] Specifically, two vertical first perforated plates 10 are fixed inside the installation frame 5. The first perforated plates 10 are plates with a plurality of regularly arranged holes inside. The top of the first perforated plates 10 is welded to the top of the installation frame 5, and the bottom of the first perforated plates 10 is welded to the bottom of the installation frame 5. The two first perforated plates 10 are respectively arranged on the left and right sides inside the installation frame 5, and the first perforated plates 10 do not abut against the side walls of the installation frame 5 to form a compartment. The mounting frame 9 is detachably mounted between the two first perforated plates 10. The front and rear ends of the first perforated plates 10 do not exceed the installation frame 5 and are indented inward to leave space, so that the vertical connecting rod 13 and the horizontal connecting rod 11 can be inserted without interference.

[0060] Specifically, the mounting frame 9 includes two second perforated plates 17 that are parallel to each other and spaced apart. The second perforated plates 17 are plates with a plurality of regularly arranged holes inside. The mounting frame 9 also includes a transverse connecting plate 19 and a bottom connecting plate 18 disposed between the two second perforated plates 17. The transverse connecting plate 19 is disposed above the bottom connecting plate 18. The left and right ends of the bottom connecting plate 18 are respectively welded to the second perforated plates 17. The left and right ends of the transverse connecting plate 19 are respectively welded to the second perforated plates 17. There are at least three transverse connecting plates 19, which are spaced apart from top to bottom. The mounting frame 9 is screwed to the first perforated plate 10 through the second perforated plates 17.

[0061] At least two layers of connecting frames 4 are arranged in layers from top to bottom in the box body 1, and each layer of connecting frames 4 includes at least one horizontal connecting frame 4, and both ends of the connecting frame 4 are detachably connected to the mounting frame 9 in the left mounting frame 5 and the mounting frame 9 in the right mounting frame 5 respectively.

[0062] Specifically, the connecting frame 4 can be a frame with a special structure. Preferably, the connecting frame 4 includes a plurality of parallel and spaced-apart planar plates, a plurality of threaded holes are provided on the bottom connecting plate 18, and both ends of the planar plates are detachably screwed to the bottom connecting plate 18.

[0063] At least two fans 8 are detachably mounted on a side of the mounting frame 9 facing away from the box body 1 .

[0064] Specifically, a plurality of threaded holes are formed on the transverse connecting plate 19 , and the fan 8 is screwed and mounted on the transverse connecting plate 19 .

[0065] A plurality of filter frames 7 covered with filters are detachably installed in the installation frame 5 . The plurality of filter frames 7 are arranged from top to bottom. The filter frames 7 are arranged on a side of the fan 8 facing away from the box body 1 .

[0066] Specifically, a plurality of threaded holes are formed at the rear end of the first perforated plate 10 , and the filter frame 7 is detachably screwed to the threaded holes at the rear end of the first perforated plate 10 .

[0067] A side of the installation frame 5 facing away from the box body 1 is also detachably covered with a dust cover 6 .

[0068] Specifically, the dust cover 6 includes a dust frame 601 and a breathable cover 602, wherein the breathable cover 602 is a cover plate having a plurality of breathable holes, and the breathable cover 602 is covered in the dust frame 601 to form the dust cover 6. The mounting frame 5 is provided with a plurality of threaded holes, and the dust cover 6 is detachably covered by the dust frame 601 and is screwed to the threaded holes of the mounting frame 5.

[0069] Multiple threaded holes are provided on the horizontal connecting rod 11, the vertical connecting rod 13, the horizontal extension plate 15 and the vertical extension plate 16. The mounting frame 5 is sleeved on the basic rectangular connecting frame or the extended rectangular connecting frame and then screwed on the threaded holes of the horizontal connecting rod 11 and the vertical connecting rod 13, or the threaded holes of the horizontal extension plate 15 and the vertical extension plate 16.

[0070] It should be noted that the threaded hole opening positions mentioned above are all shown in the accompanying drawings, and the threaded hole opening positions are commonly used technical means. The threaded hole opening positions will not be described in detail here. Technical personnel in this field can fully arrange the threaded hole opening positions based on the accompanying drawings and prior art.

[0071] It should be specially noted that, in order to facilitate the display of the component structure of the present invention and not be blocked by the bolts and nuts, the bolts and nuts are not drawn in the drawings. However, this does not prevent those skilled in the art from selecting the connection parts of the bolts and nuts by reading the description contents and the structure of the drawings in this disclosure.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular assembly structure of a DC charging pile for electric vehicles, characterized in that: The box body comprises a box door at the front end, and the left and right side walls of the box body are respectively provided with heat dissipation ports, and the outer side walls of the box body at the upper and lower ends of the heat dissipation ports are respectively fixed with horizontal connecting rods, and the outer side walls of the box body at the left and right ends of the heat dissipation ports are respectively fixed with vertical connecting rods, the horizontal connecting rods and the vertical connecting rods are not connected to each other, and the horizontal connecting rods and the vertical connecting rods are combined to form a basic rectangular connecting frame, and at least one extended rectangular connecting frame is detachably installed on the side of the basic rectangular connecting frame away from the box body, and a circular rectangular installation frame is also provided on the side of the basic rectangular connecting frame away from the box body, and the installation frame can be selectively directly installed on the basic rectangular connecting frame, and at this time, the installation frame can be detachably installed outside the basic rectangular connecting frame, or the installation frame can be selectively indirectly installed through the extended rectangular connecting frame. It is installed on the basic rectangular connecting frame, and at this time, the installing frame is detachably mounted outside the extended rectangular connecting frame. A plurality of installing frames are detachably installed in the installing frame, and the plurality of installing frames are arranged from top to bottom. At least two layers of connecting frames are also arranged in layers from top to bottom in the box body, and each layer of connecting frames includes at least one horizontal connecting frame, and the two ends of the connecting frame are respectively detachably connected to the installing frame in the left installing frame and the installing frame in the right installing frame. At least two fans are detachably installed on the side of the installing frame away from the box body, and a plurality of filter frames covered with filters are detachably installed in the installing frame, and a plurality of filter frames are arranged from top to bottom, and the filter frames are arranged on the side of the fan away from the box body, and a side of the installing frame away from the box body is detachably covered with a dust cover.

2. The modular assembly structure of a DC charging pile for electric vehicles according to claim 1, characterized in that: The top of the vertical connecting rod is also provided with a first vertical slot vertically downward, and the bottom of the first vertical slot is not connected to the bottom of the vertical connecting rod. The first vertical slot is connected to the side of the vertical connecting rod facing away from the box body to form a first vertical side opening, and the inner cavity width of the first vertical slot is greater than the width of the first vertical side opening. The left end face or the right end face of the transverse connecting rod is also horizontally and laterally provided with a first transverse slot that is not connected to the other side toward the other end, and the first transverse slot is connected to the side of the transverse connecting rod facing away from the box body to form a first transverse side opening, and the inner cavity width of the first transverse slot is greater than the width of the first transverse side opening. The extended rectangular connecting frame includes two transverse extension plates respectively arranged up and down and two vertical extension plates respectively arranged left and right, the transverse connecting plate and the vertical connecting plate are not connected to each other, and the transverse extension plate is provided with a transverse insertion strip for slidingly inserting into the first transverse slot on the side facing the box body. A vertical insertion strip for slidingly inserting into the first vertical slot is provided on one side of the vertical extension plate facing the box body, and a second horizontal slot that is not connected to the other side is horizontally and horizontally opened toward the other end on the left end face or the right end face of the horizontal extension plate, and the second horizontal slot is connected to the side of the horizontal extension plate facing away from the box body to form a second horizontal side opening, and the inner cavity width of the second horizontal slot is greater than the width of the second horizontal side opening, and a second vertical slot that is not connected to the bottom of the vertical connecting plate is vertically opened downward on the top of the vertical connecting plate, and the second vertical slot is connected to the side of the vertical connecting plate facing away from the box body to form a second vertical side opening, and the inner cavity width of the second vertical slot is greater than the width of the second vertical side opening, and when multiple extended rectangular connecting frames are connected in sequence, the outer extended rectangular connecting frame is connected to the second vertical slot and the second horizontal slot of the inner extended rectangular connecting frame through the vertical insertion strip and the horizontal insertion strip.

3. The modular assembly structure of a DC charging pile for electric vehicles according to claim 2, characterized in that: Two vertical first perforated plates are also fixedly provided inside the installation frame, the top of the first perforated plates is fixedly connected to the top of the installation frame, and the bottom of the first perforated plates is fixedly connected to the bottom of the installation frame. The two first perforated plates are respectively arranged on the left and right sides of the interior of the installation frame, and the first perforated plates do not abut against the side walls of the installation frame to form a compartment, and the installation frame is detachably installed between the two first perforated plates.

4. The modular assembly structure of a DC charging pile for electric vehicles according to claim 3, characterized in that: The mounting frame includes two second perforated plates which are parallel to each other and spaced apart, and also includes a transverse connecting plate and a bottom connecting plate which are arranged between the two second perforated plates. The transverse connecting plate is arranged above the bottom connecting plate, and the left and right ends of the bottom connecting plate are respectively fixedly connected to the second perforated plates, and the left and right ends of the transverse connecting plate are respectively fixedly connected to the second perforated plates. There are at least three transverse connecting plates, and the transverse connecting plates are spaced apart up and down. The fan is detachably mounted on the transverse connecting plate, and the mounting frame is screwed to the first perforated plate through the second perforated plate, and the connecting frame is detachably fixedly connected to the bottom connecting plate.

5. The modular assembly structure of a DC charging pile for electric vehicles according to claim 4, characterized in that: The filter frame is detachably connected to the first perforated plate.

6. The modular assembly structure of a DC charging pile for electric vehicles according to claim 1, characterized in that: The dust cover comprises a dust frame and a breathable cover, wherein the breathable cover is a cover plate with a plurality of breathable holes, and the breathable cover is covered in the dust frame to form a dust cover, and the dust cover is detachably mounted on the installation frame through the dust frame.

7. A modular assembly structure of a DC charging pile for electric vehicles according to any one of claims 4 to 6, characterized in that: The connecting frame comprises a plurality of plane plates which are parallel to each other and arranged at intervals, and two ends of the plane plates are screwed and connected to the bottom connecting plate.

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