Direct current load box

Abstract

The utility model discloses a direct-current load box, and solves the technical problems that a conventional direct-current load box is inconvenient to operate by workers and low in maintenance efficiency. The load box comprises a load box body, a fixing assembly and a protection assembly. The protection assembly is arranged on the side edge of the load box main body and is used for protecting components arranged in the load box main body; the fixing assembly is fixedly arranged at the top of the load box main body and is detachably connected with the protection assembly; the protection assembly is fixedly connected or disconnected with the load box main body through the fixing assembly. Parts in the load box main body are protected through the arranged protection assembly, when the fixing assembly is in contact fixation with the protection assembly, the protection assembly is pulled upwards to separate the protection assembly from the load box main body, and then the protection assembly can be taken down from the load box main body, so that the operation space of the load box main body can be increased; maintenance operation of workers is facilitated, and maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of load boxes, in particular to a DC load box. Background Art

[0002] A DC load box is an instrument used to test and simulate loads, and is usually used to test the performance and stability of devices such as DC power supplies and batteries. Specifically, it can simulate different load conditions, such as constant current, constant voltage, resistive load, etc., in order to perform load tests on the device under test. At the same time, the DC load box can also measure the parameters of power supplies and batteries, such as voltage, current, power, capacity, etc., to help users fully understand the performance and stability of the device under test.

[0003] In the prior art, most of the components of the load box are installed inside the box. When the components inside the load box are damaged, the box needs to be disassembled to repair the internal electronic equipment and / or damaged components. However, the space inside the box is small, which is not conducive to the operation of the staff during inspection and maintenance, thereby affecting the inspection efficiency.

[0004] In the process of implementing the present utility model, the inventors found that there are at least the following problems in the prior art:

[0005] The existing DC load box is not convenient for the staff to operate when it needs maintenance, and the maintenance efficiency is low. Utility Model Content

[0006] The purpose of the utility model is to provide a DC load box to solve the technical problems that the DC load box in the prior art is inconvenient for workers to operate and has low maintenance efficiency. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a DC load box, which includes a load box body, a fixing component and a protection component;

[0009] The protection assembly is arranged on the side of the load box body, and is used to protect the components arranged in the load box body;

[0010] The fixing assembly is fixedly arranged on the top of the load box body and is detachably connected to the protection assembly; the protection assembly is fixedly connected to or disconnected from the load box body through the fixing assembly.

[0011] Optionally, the fixing assembly includes a fixing plate and a fixing member;

[0012] The fixing plate is fixedly connected to the top of the load box body; the fixing member is arranged on the fixing plate and is detachably connected to the protective component; the fixing member can perform state conversion on the fixing plate to connect or disconnect the fixing component with the protective component.

[0013] Optionally, the fixing member includes a chamber, a connecting rod, a spring and a limit plate;

[0014] The chamber is a cavity opened in the fixed plate;

[0015] The connecting rod is arranged inside the chamber, and the spring is arranged outside the connecting rod; one end of the connecting rod passes through the fixing plate and is fixedly connected to the limiting plate located above the fixing plate.

[0016] Optionally, limiting columns are fixedly arranged on both sides of the bottom of the limiting plate, and the fixing component is connected to the protection component through the limiting columns;

[0017] A handle is provided on the top of the limiting plate, and pulling the handle can compress the spring on the outside of the connecting rod, so that the limiting column is disconnected from the protective assembly.

[0018] Optionally, the protection assembly includes a first protection assembly and a second protection assembly, and the first protection assembly and the second protection assembly are respectively arranged on both sides of the load box body;

[0019] The first protection assembly and the second protection assembly both include a protection side plate and a protection top plate, and the protection side plate is fixedly connected to the protection top plate;

[0020] Both sides of the protective side plate are provided with connecting shafts, and both side inner walls of the load box body are provided with sliding grooves, and the protective component is connected to the load box body through the connecting shafts and the sliding grooves.

[0021] Optionally, a plurality of heat dissipation holes are provided on the protective top plate, and the fixing assembly is plugged into the heat dissipation holes to fix the protective assembly to the load box body.

[0022] Optionally, the DC load box further comprises a control panel, and the control panel is arranged on one side of the load box body;

[0023] The control panel is provided with a plurality of adapter interfaces, and the load box body is provided with a load resistor inside.

[0024] Optionally, the DC load box further includes a protective cover, which is connected to the load box body and is used to cover the control panel to protect the control panel.

[0025] Optionally, a plurality of plug-in boards are fixedly mounted on a side of the protective cover close to the control panel, and a slot matching the plug-in board is provided on a side of the load box body close to the protective cover; the protective cover is plugged into the load box body through the plug-in board and the slot;

[0026] The plug board is embedded with a magnet, and the magnet is attracted to the inner wall of the slot.

[0027] Optionally, a cooling fan is provided in the load box body, and a plurality of cooling ports are provided at the bottom of the load box body, and the cooling fan is used to cooperate with the cooling ports to dissipate heat.

[0028] Implementing one of the above technical solutions of the utility model has the following advantages or beneficial effects:

[0029] The utility model protects the components in the load box body by means of the provided protection component, and when the fixing component is in contact and fixed with the protection component, the protection component can be pulled upward to separate the protection component from the load box body, and the protection component can be removed from the load box body. At this time, the operating space of the load box body can be increased, thereby facilitating maintenance operations by the staff and improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0032] Figure 2 This is a schematic diagram of the overall structure of the embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of a fixing assembly in an embodiment of the utility model;

[0034] Figure 4 is a cross-sectional view of a fixing structure in an embodiment of the utility model;

[0035] Figure 5 It is a schematic diagram of the structure of the protective cover in the embodiment of the utility model;

[0036] Figure 6 It is a schematic diagram of the structure of the protective side plate in the embodiment of the utility model when it is placed horizontally for placing tools;

[0037] Figure 7is a circuit diagram of an adapter interface in an embodiment of the utility model;

[0038] Figure 8 2 is a circuit diagram of a load resistor in an embodiment of the present utility model.

[0039] In the figure: 1. Load box body; 11. Slide; 12. Cooling fan; 13. Cooling port; 14. Slot; 2. Fixing assembly; 21. Fixing plate; 22. Fixing piece; 23. Chamber; 24. Connecting rod; 25. Spring; 26. Limiting plate; 27. Limiting column; 28. Handle; 3. Protective assembly; 31. Protective side plate; 311. Connecting shaft; 32. Protective top plate; 321. Cooling hole; 4. Control panel; 5. Protective cover; 51. Plug-in board; 52. Magnet. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the utility model clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, wherein various exemplary embodiments that may be used to implement the utility model are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of processes, methods, and devices that are consistent with some aspects of the utility model disclosed as detailed in the attached claims, and other embodiments may also be used, or the embodiments listed herein may be modified in structure and function without departing from the scope and essence of the utility model.

[0041] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", etc. indicate the orientation or position relationship based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the elements referred to must have a specific orientation, be constructed and operated in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "multiple" means two or more. The terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0042] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below, in which only the parts related to the embodiment of the present invention are shown.

[0043] Example:

[0044] like Figure 1 As shown, the utility model provides a DC load box, including a load box body 1, a fixing component 2 and a protection component 3; the protection component 3 is arranged on the side of the load box body 1, and is used to protect the components arranged in the load box body 1; the fixing component 2 is fixedly arranged on the top of the load box body, and is detachably connected to the protection component 3; the protection component 3 is fixedly connected or disconnected with the load box body through the fixing component 2.

[0045] Specifically, a plurality of components are arranged inside the load box body 1 to ensure the normal operation of the DC load box. The protection component 3 is arranged on the side of the load box body 1 and can be taken out or installed on the side of the load box body 1. The fixing component 2 is arranged on the top of the load box body 1 and is fixedly connected to the load box body 1 and is also detachably connected to the protection component 3. The fixing component 2 is used to switch the connection state between the protection component 3 and the load box body 1, so as to facilitate the fixed connection between the protection component 3 and the load box body 1, or cancel the connection between the protection component 3 and the load box body 1.

[0046] The utility model protects the components in the load box body 1 by providing a protective component 3. When the fixing component 2 is in contact and fixed with the protective component 3, the protective component 3 is pulled upward to separate the protective component 3 from the load box body 1, and the protective component 3 can be removed from the load box body 1. At this time, the operating space of the load box body 1 can be increased, thereby facilitating maintenance operations by the staff and improving maintenance efficiency.

[0047] As an optional implementation, Figure 2-Figure 4 As shown, the fixing assembly 2 includes a fixing plate 21 and a fixing member 22; the fixing plate 21 is fixedly connected to the top of the load box body 1; the fixing member 22 is arranged on the fixing plate 21 and is detachably connected to the protective assembly 3; the fixing member 22 can perform state conversion on the fixing plate 21 to connect or disconnect the fixing assembly 2 from the protective assembly 3.

[0048] Specifically, the fixing plate 21 and the fixing member 22 are movably connected, and the fixing member 22 can switch its state on the fixing plate 21, thereby canceling the fixation of the protective component 3. The fixing plate 21 is fixedly set on the top of the load box body 1, and a part of the fixing member 22 is set inside the fixing plate 21, and a part is set above the fixing plate 21. After the fixing member 22 switches its state on the fixing plate 21, the protective component 3 can be taken out from the load box body 1. It should be noted that the fixing member 22 has two working states, one of which is that the fixing member 22 is fixedly connected to the protective component 3, which is used to fix the protective component 3 on the load box body 1; the other working state is that the position of the fixing member 22 on the fixing plate 21 is changed, so that the fixing member 22 is disconnected from the connection with the protective component 3, and the protective component 3 can be taken out from the load box body 1, which is convenient for the staff to inspect the components inside the load box body 1 and to disassemble and assemble the protective component 3, thereby improving the inspection efficiency.

[0049] As an optional implementation, Figure 3-Figure 4 As shown, the fixing member 22 includes a chamber 23, a connecting rod 24, a spring 25 and a limit plate 26; the chamber 23 is a cavity opened in the fixing plate 21; the connecting rod 24 is arranged inside the chamber 23, and the spring 25 is arranged outside the connecting rod 24; one end of the connecting rod 24 passes through the fixing plate 21 and is fixedly connected to the limit plate 26 located above the fixing plate 21. Limiting columns 27 are fixedly arranged on both sides of the bottom of the limit plate 26, and the fixing component 2 is connected to the protective component 3 through the limiting columns 27; a handle 28 is arranged on the top of the limiting plate 26, and pulling the handle 28 can compress the spring 25 outside the connecting rod 24, so that the limiting column 27 is disconnected from the protective component 3.

[0050] The chamber 23, the connecting rod 24 and the spring 25 in the fixing member 22 are all arranged inside the fixing plate 21. Specifically, the chamber 23 is a cavity opened in the fixing plate 21, which is used to accommodate the connecting rod 24 and the spring 25. The connecting rod 24 is longitudinally arranged in the connecting plate, one end of the connecting rod 24 is fixedly connected to the stopper plate 26 passing through the fixing plate 21, and the other end is in contact with the bottom of the chamber 23. The spring 25 is arranged on the connecting rod 24 and is fixedly connected to the chamber 23.

[0051] The limit plate 26 is arranged on the fixed plate 21 through the connecting rod 24, and the limit posts 27 are arranged on both ends of the bottom of the limit plate 26. The limit posts 27 can be plugged with the protection component 3 to fix the protection component 3 arranged on the side of the load box body 1, limit the protection component 3, and improve the stability of the protection component 3 when in use. It should be noted that the connecting rod 24 and the limit plate 26 are connected by a bearing.

[0052] like Figure 3-Figure 4As shown, a handle 28 is provided on the top of the limiting plate 26, and the setting of the handle 28 can facilitate the separation of the fixing component 2 from the protective component 3. When the fixing component 2 needs to be separated from the protective component 3, it is only necessary to pull the handle 28, and the handle 28 drives the limiting plate 26 to rise, so that the fixing component 2 will be separated from the protective component 3, and the protective component 3 can be taken out. When the fixing component 2 limits the protective component 3, the spring 25 itself will apply a force to the limiting column 27 through the limiting plate 26 to limit the protective component 3, thereby improving the stability of the connection between the fixing component 2 and the protective component 3.

[0053] As an optional implementation, Figure 1-Figure 2 As shown, the protection assembly 3 includes a first protection assembly and a second protection assembly, and the first protection assembly and the second protection assembly are respectively arranged on both sides of the load box body 1.

[0054] It should be noted that in this embodiment, two protective components 3 are provided to protect the components inside the load box body 1. The first protective component and the second protective component are respectively arranged on both sides of the load box body 1, and the first protective component and the second protective component are respectively limited by two limiting columns 27 arranged on both sides of the bottom of the limiting plate 26. The limiting columns 27 on both sides of the bottom of the limiting plate 26 can limit the first protective component and the second protective component at the same time to ensure the stability of the first protective component and the second protective component.

[0055] The first protection assembly and the second protection assembly both include a protection side plate 31 and a protection top plate 32, and the protection side plate 31 is fixedly connected to the protection top plate 32; both sides of the protection side plate 31 are provided with connecting shafts 311, and the inner walls of both sides of the load box body are provided with slide grooves 11, and the protection assembly 3 is connected to the load box body through the connecting shafts 311 and the slide grooves 11. The protection top plate 32 is provided with a plurality of heat dissipation holes 321, and the fixing assembly 2 is plugged into the heat dissipation holes 321 to fix the protection assembly 3 to the load box body 1.

[0056] Specifically, the first limiting assembly and the second limiting assembly have the same structure. In this embodiment, only one of the protection assemblies 3 is used as an example. Figure 2 As shown, the protection assembly 3 includes a protection side plate 31 and a protection top plate 32. The protection side plate 31 and the protection top plate 32 are fixedly connected to form a right angle. The setting of the protection side plate 31 and the protection top plate 32 can contact the top of the side of the load box body 1. In order to facilitate the connection with the load box body 1, the bottom of the protection side plate 31 is set in an arc shape.

[0057] The protective side panels 31 are detachably connected to the load box body 1. Slide grooves 11 are provided on the inner walls of both sides of the load box body 1. Connecting shafts 311 are provided on both sides of the protective side panels 31. The protective side panels 31 are movably connected to the load box body 1 through the connecting shafts 311, and can be moved in the slide grooves 11 through the connecting shafts 311 to be installed or removed from the load box body 1. The protective top panel 32 is detachably connected to the fixing assembly 2. After the entire protective assembly 3 is connected to the load box body 1 through the connecting shafts 311 and the slide grooves 11, the protective top panel 32 and the fixing assembly 2 will be in the same plane. The fixing member 22 provided on the fixing assembly 2 can be converted in position, so that the limiting column 27 on the fixing member 22 is aligned with the heat dissipation hole 321 on the protective top panel 32, and plugged with the heat dissipation hole 321, and the protective top panel 32 is limited, so that the protective assembly 3 is fixed to the load box body 1. When the protective component 3 needs to be removed from the load box body 1, it is necessary to first cancel the limit of the fixing component 2 on the protective top plate 32, and then pull the protective side plate 31 upward to separate the connecting shaft 311 from the slide groove 11, and then the protective side plate 31 and the protective top plate 32 can be removed from the load box body 1. At this time, the operating space of the load box body 1 can be increased, which is convenient for the staff to perform maintenance operations on the components inside the load box body 1.

[0058] It should be noted that if Figure 2 As shown, the protective top plate 32 is provided with a plurality of heat dissipation holes 321, and the limiting posts 27 on the fixing assembly 2 can only be plugged into the designated heat dissipation holes 321 on the protective top plate 32, thereby ensuring the accuracy of the plugging position. In addition to being plugged into the limiting posts 27, the designated heat dissipation holes 321 can also dissipate the heat generated by the components in the load box body 1 during operation, just like other heat dissipation holes 321, thereby achieving the purpose of heat dissipation.

[0059] As an optional implementation, Figure 2 As shown, a plurality of heat dissipation openings 13 are provided at the bottom of the inner cavity of the load box body 1, and a heat dissipation fan 12 is also provided at the bottom of the inner cavity of the load box body 1. The heat dissipation fan 12 is used to cooperate with the heat dissipation openings 13 to dissipate heat. The heat dissipation fan 12 can accelerate the circulation between the load box body 1 and the outside air through the heat dissipation openings 13, thereby reducing the heat accumulation in the load box body 1. It should be noted that the heat dissipation holes 321 provided on the protective top plate 32 are also used for heat dissipation.

[0060] As an optional implementation, Figure 2 As shown, the DC load box also includes a control panel 4, which is arranged on one side of the load box body 1; the control panel 4 is provided with a plurality of adapter interfaces, and a load resistor is arranged inside the load box body 1. Specifically, the plurality of adapter interfaces on the control panel 4 include a conversion interface and a test interface, and the interface circuit of the adapter is as shown in FIG. Figure 7As shown, there is a conversion interface for converting 220V AC to 24V DC bridge stack to supply fan cooling. There are five groups of test interfaces, all of which are USB DC interface test voltage interfaces. The voltages in the five groups of voltage interfaces are 5V, 9V, 12V, 15V, and 20V respectively. You can connect to the corresponding test interface for testing according to different situations. The circuit diagram of the load resistor is shown in Figure 8 As shown, it is used to switch different resistive loads.

[0061] As an optional implementation, Figure 2 , Figure 5 As shown, the DC load box further includes a protective cover 5, which is connected to the load box body 1 and is used to cover the control panel 4 to protect the control panel 4. Specifically, the protective cover 5 is arranged on a side with the control panel 4, and can be connected to the load box body 1 to cover the control panel 4 to protect the control panel 4, so as to reduce the damage caused by the bumps during the movement of the control panel 4.

[0062] As an optional implementation, Figure 5 As shown, a plurality of plug-in plates 51 are fixedly mounted on one side of the protective cover 5 close to the control panel 4, and a slot 14 matching the plug-in plate 51 is provided on one side of the load box body 1 close to the protective cover 5; the protective cover 5 is plugged into the load box body through the plug-in plate 51 and the slot 14. A magnet 52 is embedded in the plug-in plate 51, and the magnet 52 is attracted to the inner wall of the slot 14. Specifically, the plug-in plate 51 is provided on the protective cover 5, and the slot 14 is provided on the load box body 1, and the plug-in plate 51 is connected to the slot 14 to improve the stability of the connection between the protective cover 5 and the load box body 1. The plug-in plates 51 are provided on both the upper and lower sides of the protective cover 5, and the plug-in plates 51 are embedded with magnets 52. When the plug-in plate 51 is connected to the slot 14, the magnet 52 on the plug-in plate 51 can directly attract the inner wall of the slot 14, further improving the stability of the plug-in plate 51 and the slot 14. When in use, the protective cover 5 can be pulled to separate the plug plate 51 from the slot 14, so that the protective cover 5 is disconnected from the load box body 1. After use, the plug plate 51 can be inserted into the slot 14 again to restore the connection.

[0063] The working principle of the DC load box provided by the utility model is as follows:

[0064] When the DC load box needs to be repaired, the handle 28 is pulled upward to raise the limit plate 26 and the limit column 27, so that the limit column 27 is separated from the heat dissipation hole 321, and then the limit plate 26 is rotated to change the position of the limit plate 26, and the position of the limit plate 26 is adjusted to be above the fixed plate 21. At this time, the fixed component 2 and the protective component 3 are disconnected. Subsequently, the protective side plate 31 is pulled upward to separate the connecting shaft 311 from the slide slot 11. At this time, the protective component 3 is also disconnected from the load box body.

[0065] If necessary, the protective side plate 31 can be turned over, and the connecting shaft 311 can be inserted into the slide groove 11, so that the return top plate is in contact with the plane supporting the load box body 1. Figure 6 At this time, the protective side plate 31 is placed horizontally, and the protective side plate 31 can be used as a placing table to place tools or parts for maintenance, and has a variety of uses.

[0066] After the inspection is completed, pull the protective side plate 31 upward to separate the connecting shaft 311 from the slide groove 11, then stand the protective side plate 31 upright and reset it, and then insert the connecting shaft 311 into the slide groove 11, pull the handle upward and rotate it in the opposite direction so that the limit column 27 is aligned with the heat dissipation port 13 and then insert it.

[0067] The embodiment is only a special case and does not indicate that the present invention is implemented in such a way.

[0068] The above description is only the preferred embodiment of the present invention. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. A DC load box, characterized in that: It comprises a load box body (1), a fixing component (2) and a protection component (3); The protection component (3) is arranged on the side of the load box body (1) and is used to protect the components arranged in the load box body (1); The fixing component (2) is fixedly arranged on the top of the load box body and is detachably connected to the protection component (3); the protection component (3) is fixedly connected to or disconnected from the load box body through the fixing component (2).

2. A DC load box according to claim 1, characterized in that: The fixing assembly (2) comprises a fixing plate (21) and a fixing member (22); The fixing plate (21) is fixedly connected to the top of the load box body (1); the fixing member (22) is arranged on the fixing plate (21) and is detachably connected to the protection component (3); the fixing member (22) can perform state conversion on the fixing plate (21) to connect or disconnect the fixing component (2) with the protection component (3).

3. A DC load box according to claim 2, characterized in that: The fixing member (22) comprises a chamber (23), a connecting rod (24), a spring (25) and a limiting plate (26); The chamber (23) is a cavity opened in the fixing plate (21); The connecting rod (24) is arranged inside the chamber (23), and the spring (25) is arranged outside the connecting rod (24); one end of the connecting rod (24) passes through the fixing plate (21) and is fixedly connected to the limiting plate (26) located above the fixing plate (21).

4. A DC load box according to claim 3, characterized in that: Limiting columns (27) are fixedly arranged on both sides of the bottom of the limiting plate (26), and the fixing component (2) is connected to the protection component (3) via the limiting columns (27); A handle (28) is provided on the top of the limiting plate (26), and pulling the handle (28) can compress the spring (25) outside the connecting rod (24), so that the limiting column (27) is disconnected from the protective component (3).

5. A DC load box according to claim 1, characterized in that: The protection component (3) comprises a first protection component (3) and a second protection component (3), wherein the first protection component (3) and the second protection component (3) are respectively arranged on two sides of the load box body (1); The first protection component (3) and the second protection component (3) both comprise a protection side plate (31) and a protection top plate (32), and the protection side plate (31) is fixedly connected to the protection top plate (32); Both sides of the protective side plate (31) are provided with connecting shafts (311), and both side inner walls of the load box body are provided with sliding grooves (11), and the protective component (3) is connected to the load box body through the connecting shafts (311) and the sliding grooves (11).

6. A DC load box according to claim 5, characterized in that: The protective top plate (32) is provided with a plurality of heat dissipation holes (321), and the fixing component (2) is plugged into the heat dissipation holes (321) to fix the protective component (3) and the load box body (1).

7. A DC load box according to claim 1, characterized in that: The DC load box further comprises a control panel (4), wherein the control panel (4) is arranged on one side of the load box body (1); The control panel (4) is provided with a plurality of adapter interfaces, and the load box body (1) is provided with a load resistor inside.

8. A DC load box according to claim 7, characterized in that: The DC load box further comprises a protective cover (5), which is connected to the load box body (1) and is used to cover the control panel (4) to protect the control panel (4).

9. A DC load box according to claim 8, characterized in that: A plurality of plug-in plates (51) are fixedly mounted on a side of the protective cover (5) close to the control panel (4); a slot (14) matching the plug-in plates (51) is provided on a side of the load box body (1) close to the protective cover (5); the protective cover (5) is plugged into the load box body via the plug-in plates (51) and the slot (14); A magnet (52) is embedded on the plug plate (51), and the magnet (52) is attracted to the inner wall of the slot (14).

10. A DC load box according to claim 1, characterized in that: A heat dissipation fan (12) is arranged inside the load box body (1), and a plurality of heat dissipation openings (13) are arranged at the bottom of the load box body (1); the heat dissipation fan (12) is used to cooperate with the heat dissipation openings (13) to dissipate heat.

Images