Direct current charging socket

Abstract

The utility model discloses a direct current charging socket, comprising a DC housing, a signal terminal assembly, a PE terminal assembly containing a sealing ring, a fixing member assembly, a tail cover and a power terminal assembly containing a sealing ring, the signal terminal assembly, a front end PE terminal and the fixing member assembly are limited in the DC housing and the tail cover which are in buckle connection; the rear-end PE terminal is inserted into the charging socket, is connected with the front-end PE terminal in an inserting manner and is connected with the tail cover in a buckling manner; the power terminal assembly is inserted into the charging socket, is limited through the fixing part, and is connected with the tail cover in a buckling manner. According to the utility model, the structure of the fixing member is improved, the assembly process is simplified, the wire harness can be installed after the charging socket is assembled, and the related operation of pre-installing the fixing member on the wire harness is reduced. The temperature sensor integrated on the PCBA board monitors the temperature of the heat conduction silica gel through heat conduction, and further feeds back the temperature rise change of the power terminal, thereby improving the monitoring precision.

Description

Technical Field

[0001] The utility model relates to the technical field of charging sockets, specifically, a DC charging socket. Background Art

[0002] The common installation sequence of a new energy vehicle charging socket is to assemble fixing parts, a PCBA board, power terminals and wires into an accessory and then install and fix it. Subsequently, relevant accessories such as a sealing ring and a tail cover are installed. Since the wires need to be installed in the early stage, the position and condition of the wires need to be paid attention to at all times during the installation process. This installation sequence is relatively cumbersome and laborious.

[0003] Moreover, the temperature monitoring of the power terminals inside the charging socket often monitors the temperature inside the connector housing through the temperature sensor on the PCBA board, and then monitors the temperature rise change of the terminals. This method is prone to the problem that there is a large difference between the monitored temperature and the actual temperature. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a new DC charging socket. Through the change and optimization of the component design, it meets the requirements of post-installation of the wire harness, simplifies the assembly process, and can also meet the needs of automated equipment. At the same time, thermal conductive silicone is added to more intuitively monitor the temperature rise of the terminals, improving the accuracy and precision of the monitoring.

[0005] The utility model solves the above problems through the following technical solutions:

[0006] A DC charging socket includes: a DC housing, a signal terminal assembly, a PE terminal assembly with a sealing ring, a fixing part assembly, a tail cover and a power terminal assembly with a sealing ring. The signal terminal assembly, the front-end PE terminal of the PE terminal assembly and the fixing part assembly are limited and arranged inside the DC housing and the tail cover which are snap-connected; the rear-end PE terminal of the PE terminal assembly is inserted into the charging socket and is plugged into the front-end PE terminal, and is snap-connected with the tail cover; the power terminal assembly is inserted into the charging socket, and the power terminal assembly is limited by the fixing part and is snap-connected with the tail cover.

[0007] As a further improvement, the PE terminal assembly, the signal terminal assembly and the power terminal assembly are axially inserted into the charging socket and penetrate through the fixing part assembly between the DC housing and the tail cover.

[0008] As a further improvement, the fixing part assembly includes a fixing part, thermal conductive silicone and a PCBA board. Among them, the fixing part is formed with a first installation opening, a second installation opening, a third installation opening and a fourth installation opening, which are respectively used for installing or avoiding the signal terminal assembly, the power terminal assembly, the PE terminal assembly and the thermal conductive silicone;

[0009] The heat-conducting silica gel is embedded in the fourth mounting opening of the fixing member. The water-drop type thermistor provided on the front surface of the PCBA board passes through the fixing member and is arranged in the thermistor mounting hole of the heat-conducting silica gel, and the heat-conducting silica gel is in contact with the water-drop type thermistor and the power terminal of the power terminal assembly.

[0010] As a further improvement, the signal terminal connection posts provided on the front surface of the PCBA board are inserted into the signal terminals of the signal terminal assembly, and the signal terminals are formed with a first inner elastic piece, an outer elastic piece and a second inner elastic piece from front to back. Through the cooperation of the second inner elastic piece and the signal terminal connection posts, the outer elastic piece realizes axial predetermined limit with the housing.

[0011] As a further improvement, the outer elastic pieces of each of the signal terminals are provided in two and are arranged back to back up and down.

[0012] As a further improvement, the low-voltage signal connection posts provided on the back surface of the PCBA board are inserted into the low-voltage signal sheath covering the tail end of the tail cover.

[0013] As a further improvement, a moving process hole is formed on the fixing member, and a through hole corresponding to the moving process hole is provided on the tail cover. The through hole corresponding to the moving process hole is blocked by a tail cover blind plug.

[0014] As a further improvement, the power terminal assembly includes a power terminal, a power wire, a shielding ring, a wire sealing body and a cable tail cover, and is limited and fixed to the fixing member through the power terminal; the power terminal is welded to the power wire, and a shielding ring, a wire sealing body and a cable tail cover are arranged outside the power wire, and the cable tail cover is snap-connected to the tail cover.

[0015] As a further improvement, a PE wire sealing body and a PE cable tail cover are sleeved outside the rear-end PE terminal, and the PE cable tail cover is snap-connected to the tail cover to limit the PE terminal assembly in the charging socket.

[0016] As a further improvement, a tail cover sealing ring for circumferentially sealing the fixing member is arranged inside the tail cover;

[0017] A plurality of mounting and fixing points for fixing the heat-conducting silica gel are formed on the front surface of the fixing member, and the mounting and fixing points are located outside the fourth mounting hole.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0019] The present utility model improves the structure of the fixing part, simplifies the assembly process, and the wiring harness can be installed after the charging socket is assembled, reducing the related operations of pre-installing the fixing part for the wiring harness. By the downward displacement of the fixing part, the axial displacement of the power terminal is restricted to ensure the installation position of the power terminal. Thermal conductive silicone is added, and the temperature sensor integrated on the PCBA board monitors the temperature of the thermal conductive silicone through heat conduction, and then feeds back the change of the temperature rise of the power terminal, improving the monitoring accuracy. The structure design of the signal terminal is changed and formed by stamping, improving the terminal processing efficiency and reducing the weight of the signal terminal. Description of the Drawings

[0020] Figure 1 is an exploded view of a DC charging socket according to the present utility model;

[0021] Figure 2 is an installation view of the DC housing and the signal terminal according to the present utility model;

[0022] Figure 3 is an installation view of the thermal conductive silicone and the fixing part according to the present utility model;

[0023] Figure 4 is an installation view of the fixing part, the DC housing and the front-end PE terminal according to the present utility model;

[0024] Figure 5 is an installation view of the signal terminal and the PCBA board according to the present utility model;

[0025] Figure 6 is an installation view of the fixing part and the PCBA board according to the present utility model;

[0026] Figure 7 is a schematic view before the displacement of installing the fixing part into the DC housing according to the present utility model;

[0027] Figure 8 is a schematic view after the displacement of installing the fixing part into the DC housing according to the present utility model;

[0028] Figure 9 is an installation view of the power terminal assembly and the fixing part according to the present utility model;

[0029] Figure 10 is a schematic view of the structure of the rear end of the tail cover according to the present utility model;

[0030] Figure 11 is an installation view of the power terminal assembly according to the present utility model;

[0031] Figure 12 is a mating view of the fixing part and the power terminal assembly according to the present utility model;

[0032] Figure 13Schematic diagram of the closure of the DC housing and the end cap of the present utility model;

[0033] Figure 14 Schematic diagram of the structural installation at the rear end of the end cap of the present utility model.

[0034] Reference numerals:

[0035] 1. DC housing; 10. Power terminal; 11. Shielding ring; 12. Cable sealing body; 13. Cable end cap; 14. Low-voltage signal sheath; 15. Rear-end PE terminal; 16. PE cable sealing body; 17. PE cable end cap; 18. Third buckle; 19. First buckle; 2. Signal terminal; 20. Second card slot; 21. First inner elastic piece; 22. Outer elastic piece; 23. Second inner elastic piece; 24. Second limiting groove; 3. Front-end PE terminal; 31. First limiting groove; 4. Fixing member; 41. First mounting opening; 42. Second mounting opening; 43. Third mounting opening; 44. Fourth mounting opening; 45. Mounting and fixing point; 46. First limiting protrusion; 47. Second limiting protrusion; 48. Moving process hole; 5. Thermal conductive silicone; 51. Thermosensitive mounting hole; 6. PCBA board; 61. Signal terminal connection post; 62. Droplet-shaped thermistor; 63. Low-voltage signal connection post; 7. End cap sealing ring; 8. End cap; 81. First card slot; 82. Second buckle; 9. End cap blind plug. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as a limitation to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0037] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0038] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, or an internal communication between two components or an interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship in the drawings. These terms are only used to facilitate the description of the present application and simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0040] In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or display that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0041] The following will be combined with Figure 1-14 to elaborate in detail on a DC charging socket involved in the embodiments of the present application. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation to the present application.

[0042] Embodiment:

[0043] Combined with the attached Figure 1-14 As shown, a DC charging socket includes: a DC housing 1, a signal terminal assembly, a PE terminal assembly with a sealing ring, a fixing member assembly, a tail cover 8, and a power terminal assembly with a sealing ring. The signal terminal assembly, the front-end PE terminal of the PE terminal assembly, and the fixing member assembly are limitedly arranged within the DC housing and the tail cover that are snap-connected; the rear-end PE terminal of the PE terminal assembly is inserted into the charging socket and is plugged into the front-end PE terminal, and is snap-connected to the tail cover; the power terminal assembly is inserted into the charging socket, the power terminal assembly is limited by the fixing member, and is snap-connected to the tail cover to meet the requirement of rear-mounted cable through the power terminal assembly.

[0044] Furthermore, the PE terminal assembly, the signal terminal assembly, and the power terminal assembly are axially inserted into the charging socket and penetrate through the fixing member assembly between the DC housing and the tail cover.

[0045] The fixing component includes a fixing piece 4, a thermal conductive silicone 5, and a PCBA board 6. Among them, the fixing piece 4 is formed with a first mounting opening 41, a second mounting opening 42, a third mounting opening 43, and a fourth mounting opening 44, which are respectively used for installing or avoiding the signal terminal component, the power terminal component, the PE terminal component, and the thermal conductive silicone 5; outside the fourth mounting opening 44 on the front surface of the fixing piece 4, there is a mounting and fixing point 45 to embed the thermal conductive silicone 5 into the fourth mounting opening 44 and position and install the thermal conductive silicone 5 through the mounting and fixing point 45. The thermal conductive silicone 5 is in contact with the water-drop type thermistor 62 and the power terminal. On the front surface of the PCBA board 6, there are several signal terminal connection posts 61 and a water-drop type thermistor 62 corresponding to the thermistor mounting holes of the thermal conductive silicone 5, so as to be plugged into the signal terminal component through the signal terminal connection posts 61; the water-drop type thermistor 62 is arranged in the thermistor mounting holes of the thermal conductive silicone 5. Through the thermal conductive silicone, the temperature sensor integrated on the PCBA board monitors the temperature of the thermal conductive silicone through heat conduction, and then feeds back the change of the temperature rise of the power terminal, improving the monitoring accuracy. On the back surface of the PCBA board 6, there are several low-voltage signal connection posts 63, and the low-voltage signal connection posts 63 are plugged into the low-voltage signal sheath 14 covered at the tail end of the tail cover 8.

[0046] At the front end of the tail cover 8, there are several first card slots 81 that cooperate with the first buckles 19 provided at the tail end of the DC housing 1 to realize the snap connection between the tail cover and the DC housing; at the tail end of the tail cover 8, there are several second buckles 82 that cooperate with the second card slots 20 provided at the tail end of the power terminal component to realize the snap connection between the tail cover and the power terminal. A limiting structure for limiting the lower side of the PE terminal component is provided inside the tail cover 8. There is a through hole on the tail cover for the operator to observe whether the moving process hole 48 on the fixing piece 4 is in place, and this through hole is blocked by the tail cover blind plug 9.

[0047] Specifically, the power terminal component includes a power terminal 10, a power wire, a shielding ring 11, a wire sealing body 12, and a cable tail cover 13, which is limited and fixed to the fixing piece through the power terminal; the power terminal is welded to the power wire, and a shielding ring, a wire sealing body, and a cable tail cover are arranged outside the power wire, and the cable tail cover is snap-connected to the tail cover. A second limiting groove 24 is formed on the power terminal, so that when the power terminal 10 penetrates through the fixing piece 4, the second limiting groove 24 cooperates with the second limiting protrusion 47 provided on the fixing piece 4 at the second mounting opening 42 to prevent the power terminal 10 from withdrawing. The shielding ring 11 and the wire sealing body 12 are sleeved outside the power terminal 10, and a cable tail cover 13 is arranged at the tail end of the power terminal 10 to snap-connect the tail end of the cable to the second buckle 82 at the rear end of the tail cover. The power wire of the cable terminal component is crimped with the shielding ring and then welded to the power terminal. After the power wire is crimped with the power terminal, it is inserted into the corresponding hole position of the DC housing.

[0048] The PE terminal assembly includes a front-end PE terminal 3 and a rear-end PE terminal 15 that are plugged into each other. A PE wire sealing body 16 and a PE cable end cap 17 are sleeved on the tail end of the rear-end PE terminal 15. A third buckle 18 is formed on the outside of the PE cable end cap 17, and it is buckled with a third slot on the end cap to limit the PE terminal assembly in the charging socket.

[0049] The signal terminal assembly includes a number of signal terminals. The signal terminal 2 includes a first inner elastic piece 21, an outer elastic piece 22, and a second inner elastic piece 23 from front to back. The outer elastic piece 22 is clamped inside the DC housing, and the second inner elastic piece 23 is used to be plugged and clamped with the signal terminal connection post 61 of the PCBA board to prevent withdrawal.

[0050] Preferably, a tail cap sealing ring 7 is also provided inside the tail cap to circumferentially seal the fixing part.

[0051] The assembly relationship between the components is as follows:

[0052] Refer to the appendix Figure 2 The signal terminal assembly is composed of a number of independent signal terminals 2. A number of signal terminals 2 are inserted into the DC housing 1 from the tail end of the DC housing 1. Each signal terminal is provided with at least one outer elastic piece 22 from the front end to the rear end to cooperate with an axially predetermined limiting hole inside the DC housing through the outer elastic piece to clamp the signal terminal inside the DC housing and prevent the signal terminal from withdrawing. Preferably, two outer elastic pieces are provided for each signal terminal and are arranged back to back vertically.

[0053] Refer to the appendix Figure 3 Refer to the appendix

[0054] Refer to the appendix Figure 4 A number of mounting and fixing points 45 for mounting the thermal conductive silicone 5 are formed on the front side of the fixing part 4 to arrange the thermal conductive silicone 5 on the front side of the fixing part through the mounting and fixing points. In this embodiment, one thermal conductive silicone 5 is provided on each of the left and right sides, and one thermal conductive silicone is installed through the triangular mounting and fixing points respectively. The first mounting opening 41, the second mounting opening 42, and the third mounting opening 43 of the fixing part 4 are respectively used for mounting the signal terminal, the power terminal, and the front-end PE terminal 3, and the DC housing is formed with mounting holes corresponding to the first mounting opening, the second mounting opening, and the third mounting opening.

[0055] Refer to the appendix Figure 5, the signal terminal connection post 61 on the PCBA board 6 is plugged and connected with the signal terminal, and is fixed to the signal terminal connection post 61 through the second inner elastic piece 23 inclined inward on the signal terminal, so as to plug one end of the signal terminal with the PCBA board.

[0056] Refer to the appendix Figure 6 , plug the PCBA board 6 at the rear side of the fixing member 4, and the contact point of the water-drop type thermistor 62 on the PCBA board 6 passes through the fixing member 4 and is arranged in the thermistor mounting hole 51 in the heat-conducting silica gel, and is in close fit with the heat-conducting silica gel to ensure heat conductivity.

[0057] Refer to the appendix Figure 7 , schematic diagram of the fixing member before displacement, the signal terminal is located at the lower side of the first mounting opening of the fixing member 4; the power terminal is located at the lower side of the second mounting opening of the fixing member; the front-end PE terminal 3 is located at the lower side of the third mounting opening of the fixing member, and a first limiting protrusion 46 is formed in the third mounting opening for cooperating with the first limiting groove 31 of the front-end PE terminal; when the fixing member is inserted into the DC housing from the rear end of the DC housing, the signal terminal, the power terminal, and the front-end PE terminal are all located at the lower sides of the first mounting opening, the second mounting opening, and the third mounting opening of the fixing member, and there is a certain distance between the position before the fixing member is displaced and the power terminal position to ensure the requirement of post-installation of the wire harness.

[0058] Refer to the appendix Figure 8 , schematic diagram of the fixing member after displacement, after the fixing member 4 is fitted with the DC housing 1, the fixing member 4 is fixed in the left-right and front-back positions through the mounting ribs on the DC housing, and then the fixing member is moved downward so that the signal terminal, the power terminal, and the front-end PE terminal mounted on the DC housing 1 all move upward relative to the fixing member, so that the signal terminal, the power terminal, and the front-end PE terminal are respectively located at the corresponding upper side positions of the first mounting opening, the second mounting opening, and the third mounting opening of the fixing member. After the fixing member is displaced, the front-end PE terminal is closely attached to the upper side of the third mounting opening, and the power terminal is closely attached to the upper side of the second mounting opening. And the contact point of the water-drop type thermistor is located at the upper side in the heat-conducting silica gel, and the contact point of the water-drop type thermistor is in interference fit with the heat-conducting silica gel, and the lower side of the heat-conducting silica gel 5 is in interference fit with the power terminal in the second mounting opening to better realize transmission.

[0059] Refer to the appendix Figure 9, a tail cover seal ring 7 is arranged inside the tail cover 8, and a first clamping groove 81 at the front end of the tail cover is matched with a first clamping buckle 19 of the DC housing 1 to cover the tail cover at the tail end of the DC housing 1. A second limiting groove 24 is formed on the outer side of the power terminal and is matched with a second limiting protrusion 47 on the fixing member to limit the power terminal and the fixing member to prevent the power terminal from withdrawing from the fixing member. A second clamping groove 20 on the cable tail cover 13 is matched with a second clamping buckle 82 at the rear end of the tail cover to cover the cable tail cover at the rear end of the tail cover 8. A tail cover blind plug 9 is arranged inside the tail cover and is used for blocking an opening corresponding to a moving process hole 48 of the corresponding fixing member on the tail cover; after the fixing member moves to the fixed position point, the tail cover blind plug is installed to meet the protection level requirements. The low-voltage signal sheath 14 is embedded at the tail end of the tail cover 8 and is used for blocking an opening arranged on the low-voltage signal connection post 63 of the corresponding PCBA board on the tail cover 8 and is inserted into the low-voltage signal connection post 63 on the PCBA board.

[0060] The front end of the rear-end PE terminal 15 is used for being inserted into the rear end of the front-end PE terminal, and a PE wire sealing body and a PE cable tail cover are formed at the tail of the rear-end PE terminal. Through the cooperation of a third clamping buckle 18 on the PE cable tail cover and a third clamping groove on the tail cover, the rear-end PE terminal is limited and arranged inside the tail cover.

[0061] Specifically, the assembly process is as follows:

[0062] Refer to the appendix Figure 13 , assemble the DC housing 1, the signal terminal assembly, the front-end PE terminal, the fixing member assembly, the tail cover seal ring 7 and the tail cover 8 into a whole, then set the tail cover blind plug 9, the power terminal assembly and the rear-end PE terminal at the corresponding mounting holes, refer to the appendix Figure 14 , and insert the rear-end PE terminal into the front-end PE terminal.

[0063] The utility model improves the structure of the fixing member, simplifies the assembly process, and the wire harness can be installed after the charging socket is assembled, reducing the related operations of pre-installing the fixing member on the wire harness. By the downward displacement of the fixing member, the axial displacement of the power terminal is restricted to ensure the installation position of the power terminal. The heat-conducting silica gel is added, and the temperature sensor integrated on the PCBA board monitors the temperature of the heat-conducting silica gel through heat conduction, and then feeds back the change of the temperature rise of the power terminal, improving the monitoring accuracy. The structure design of the signal terminal is changed and formed by stamping, improving the processing efficiency of the terminal and reducing the weight of the signal terminal.

[0064] Although the present utility model is described herein with reference to the illustrative embodiments of the present utility model, the above embodiments are only the preferred embodiments of the present utility model, and the embodiments of the present utility model are not limited by the above embodiments. It should be understood that those skilled in the art can design many other modifications and embodiments, and these modifications and embodiments will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A DC charging socket, characterized in that, Including: A DC housing, a signal terminal assembly, a PE terminal assembly with a sealing ring, a fixing component assembly, a tail cover, and a power terminal assembly with a sealing ring. The signal terminal assembly, the front-end PE terminal of the PE terminal assembly, and the fixing component assembly are limited and arranged inside the DC housing and the tail cover connected by snap connection; the rear-end PE terminal of the PE terminal assembly is inserted into the charging socket and plugged into the front-end PE terminal, and is snap-connected with the tail cover; the power terminal assembly is inserted into the charging socket, the power terminal assembly is limited by the fixing component, and is snap-connected with the tail cover.

2. The DC charging socket according to claim 1, wherein The PE terminal assembly, the signal terminal assembly, and the power terminal assembly are axially inserted into the charging socket and penetrate through the fixing component assembly between the DC housing and the tail cover.

3. The DC charging socket according to claim 1 or 2, characterized in that, The fixing component assembly includes a fixing component, heat-conducting silica gel, and a PCBA board. Among them, the fixing component is formed with a first mounting opening, a second mounting opening, a third mounting opening, and a fourth mounting opening, which are respectively used for mounting or avoiding the signal terminal assembly, the power terminal assembly, the PE terminal assembly, and the heat-conducting silica gel. The heat-conducting silica gel is embedded in the fourth mounting opening of the fixing component. The water-drop-shaped thermistor arranged on the front side of the PCBA board passes through the fixing component and is arranged in the thermistor mounting hole of the heat-conducting silica gel, and the heat-conducting silica gel is attached to the water-drop-shaped thermistor and the power terminal of the power terminal assembly.

4. The DC charging socket according to claim 3, characterized in that, The signal terminal connection column arranged on the front side of the PCBA board is plugged into the signal terminal of the signal terminal assembly. The signal terminal is formed with a first inner elastic piece, an outer elastic piece, and a second inner elastic piece from front to back. Through the cooperation of the second inner elastic piece and the signal terminal connection column, the outer elastic piece realizes axial predetermined limitation with the housing.

5. The DC charging socket according to claim 4, wherein, Two outer elastic pieces are arranged for each signal terminal, and are arranged back to back up and down.

6. The DC charging socket according to claim 3, characterized in that, The low-voltage signal connection column arranged on the back side of the PCBA board is plugged into the low-voltage signal sheath covering the tail end of the tail cover.

7. The DC charging socket according to claim 3, characterized in that, A moving process hole is formed on the fixing component, and a through hole corresponding to the moving process hole is arranged on the tail cover. The through hole corresponding to the moving process hole is blocked by a tail cover blind plug.

8. The DC charging socket according to claim 3, wherein The power terminal assembly includes a power terminal, a power wire, a shielding ring, a wire-sealing body, and a cable tail cover, and is limited and fixed by the power terminal with the fixing component; the power terminal is welded to the power wire, and a shielding ring, a wire-sealing body, and a cable tail cover are arranged outside the power wire, and are snap-connected with the tail cover through the cable tail cover.

9. The DC charging socket according to claim 3, characterized in that, A PE wire-sealing body and a PE cable tail cover are sleeved outside the rear-end PE terminal, and the PE cable tail cover is snap-connected with the tail cover to limit the PE terminal assembly in the charging socket.

10. The DC charging socket according to claim 1, characterized in that, A tail cover sealing ring for circumferentially sealing the fixing component is arranged inside the tail cover; A plurality of mounting and fixing points for fixing the heat-conducting silica gel are formed on the front side of the fixing component, and the mounting and fixing points are located outside the fourth mounting hole.

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