Charging socket

Abstract

The present invention relates to a connector particularly suitable for charging electric vehicles, and in particular to a charging socket. The present invention pioneers a charging socket, which provides an inwardly extending connecting ear plate at the rear side of the plug-in cavity, so that the socket insulator is plugged into the plug-in cavity from front to back, and is fixedly connected to the mounting flange through the connecting ear plate located within the contour of the plug-in cavity, so that the space outside the plug-in cavity is not occupied, which is conducive to reducing the size of the charging socket, especially for a charging socket with two socket insulators having both DC charging function and AC charging function, the miniaturization is more obvious.

Description

Technical Field

[0001] The present invention relates to a connector particularly suitable for charging an electric vehicle, and in particular to a charging socket. Background Art

[0002] With the rapid development and popularization of electric vehicles, the iteration speed of related parts is getting faster and faster. The high-power charging and charging convenience of charging electric vehicles have a great impact on improving user experience. Therefore, a multifunctional integrated charging socket that can simultaneously charge AC and DC has emerged, which has a plug port for plugging in a DC charging gun and a plug port for plugging in an AC charging gun.

[0003] For example, the socket disclosed in the Chinese utility model patent with authorization announcement number CN207098132U, the socket disclosed in the Chinese utility model patent with authorization announcement number CN209169570U, and the charging connector disclosed in the Chinese utility model patent with authorization announcement number CN211054944U are all charging sockets with both AC charging and DC charging functions. At the same time, these sockets also have some common features, that is, they all include a mounting flange for fixed connection with the corresponding mounting panel on the vehicle, and the mounting flange is provided with a avoidance socket for the DC charging gun and the AC charging plug gun to be plugged in. Correspondingly, two socket insulators corresponding to the two plug guns are installed on the mounting flange. The socket insulator is provided with a socket terminal mounting hole for the socket terminal to be installed, and the mounting flange is provided with an insulator connection hole on the periphery of the avoidance socket hole. The socket insulator is fitted with the mounting flange from the rear side of the mounting flange, and the flange connection hole at its edge position corresponds to the insulator connection hole, and is fastened and connected by threaded fasteners.

[0004] On the one hand, this structural feature requires the installation flange to reserve a larger size to avoid the periphery of the socket in order to achieve a fixed connection with the socket insulator, resulting in a larger size of the entire socket; on the other hand, with the continuous optimization and adjustment of the socket structure, there will often be a need to adjust the relative positions of the DC plug port and the AC plug port. In some cases, not only the structure of the installation flange needs to be adjusted, but also the structure of the plug insulator connected to the installation flange needs to be adjusted, which increases the optimization and adjustment cost. Summary of the invention

[0005] The object of the present invention is to provide a charging socket to solve the problem that the existing charging socket is large in size.

[0006] The charging socket of the present invention includes a mounting flange and a socket insulator mounted on the mounting flange. The mounting flange is provided with a plug-in cavity for adapting to and inserting the plug-in terminal of the charging gun. The socket insulator is provided with a socket terminal mounting hole. The socket terminal is installed in the socket terminal mounting hole and the front end is a plug-in end for plugging with the charging terminal of the charging gun, and the rear end is a wiring terminal. The plug-in cavity is arranged to be through-connected front to back and the rear side is connected to a connecting ear plate extending toward the inner side of the plug-in cavity. The socket insulator is provided with a connecting structure corresponding to the connecting ear plate. The socket insulator is plugged into the plug-in cavity from the front side of the plug-in cavity and fixedly connected to the mounting flange.

[0007] Furthermore, an extension arm extending backward is provided at the rear end of the cavity wall of the plug-in cavity, and the connecting ear plate is provided at the rear end of the extension arm.

[0008] Furthermore, the socket insulator includes an insulating plate body, which is provided with a terminal mounting cavity that passes through from front to back, the inner hole of the terminal mounting cavity constitutes the socket terminal mounting hole, the terminal mounting cavity has cavity sections located on the front and back sides of the insulating plate body, the cavity section located on the front side of the insulating plate body is located in the plug-in cavity, the insulating plate body is provided with a rearward extending boss, and the connecting structure is a screw connecting hole arranged on the rear end surface of the boss.

[0009] Furthermore, there are more than two extension arms and they are arranged at intervals around the plug-in cavity.

[0010] Furthermore, the outer contour shape of the insulating plate body matches the inner contour shape of the plug-in cavity, and the rear end of the plug-in cavity is provided with an inner flange for stopping the insulating plate body in the backward direction, and after the socket insulator is plugged into the plug-in cavity from the front side of the plug-in cavity, the cavity section of the terminal installation cavity on the front side of the insulating plate body is in the plug-in cavity, and the cavity section of the terminal installation cavity on the rear side of the insulating plate body is outside the plug-in cavity.

[0011] Furthermore, at least part of the terminal installation cavity is provided with a radially penetrating sensor installation hole on the cavity section at the rear side of the insulating plate body, and a temperature sensor having a temperature sensing probe inserted into the terminal installation cavity is installed in the sensor installation hole.

[0012] Furthermore, the mounting flange comprises a flange connecting plate, the flange connecting plate is provided with a flange hole for connecting with the mounting panel, the flange connecting plate is provided with a plug-in pipe section extending backwards, and the inner cavity of the plug-in pipe section constitutes the plug-in cavity.

[0013] Furthermore, at least some of the socket terminals are jack terminals, and the front end of the terminal mounting cavity is provided with an inward-turned edge to stop the front end of the jack terminal. A forward-facing stopping surface is provided on the rear side of the inward-turned edge in the terminal mounting cavity. At least some of the jack terminals are provided with a retaining spring sheet extending radially outward from front to back. The jack terminal is inserted into the terminal mounting cavity from back to front and after the retaining spring sheet passes over the stopping surface, it is stopped in the backward direction by the stopping surface.

[0014] Furthermore, the charging socket is a charging socket having two plug-in cavities and two socket insulators and capable of taking into account both DC charging and AC charging.

[0015] The present invention pioneers a charging socket, which provides an inwardly extending connecting ear plate on the rear side of the plug-in cavity, so that the socket insulator is plugged into the plug-in cavity from front to back, and is fixedly connected to the mounting flange through the connecting ear plate located within the contour of the plug-in cavity. In this way, the space outside the plug-in cavity is no longer occupied, which is conducive to reducing the size of the charging socket, especially for a charging socket with two socket insulators having both DC charging function and AC charging function, the miniaturization is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a charging socket of the present invention from a front side perspective; Figure 2 A schematic diagram of a charging socket of the present invention from a rear side perspective; Figure 3 It is a schematic diagram of the assembly between the mounting flange of the charging socket and the socket insulator; Figure 4 It is a schematic diagram of the assembly between some socket terminals and the socket insulator of the charging socket; Figure 5 It is a structural schematic diagram of the mounting flange from the first perspective; Figure 6 It is a structural schematic diagram of the second viewing angle of the mounting flange; Figure 7 is a schematic structural diagram of the second insulator from a rear side perspective; Figure 8 is a schematic structural diagram of the second insulator from the front side perspective; Fig. 9 Schematic diagram of the structure of the second type of power terminal.

[0017] In the figure: 1. mounting flange; 10. first plug-in cavity; 11. second plug-in cavity; 20. first socket insulator; 21. second socket insulator; 207. inner turn edge; 208. stop groove; 211. extension arm; 212. connecting ear plate; 220. insulating plate body; 221. terminal mounting cavity; 231. boss; 232. screw connection hole; 240. inner flange; 30. second type power terminal; 301. stop spring; 302. terminal; 5. sealing cover; 50. sealing body; 7. temperature sensor. DETAILED DESCRIPTION

[0018] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0019] The present invention changes the assembly connection relationship between the socket insulator and the mounting flange, thereby changing the existing structural form of the socket insulator and the peripheral fixed connection of the avoidance socket on the mounting flange, so that the socket insulator is plugged into the plug-in cavity from the front side of the plug-in cavity, and is fixedly connected to the mounting flange through a connecting ear plate located within the contour of the plug-in cavity, no longer occupying the space outside the plug-in cavity, which is conducive to reducing the size of the charging socket.

[0020] Based on the above concept, various embodiments are provided below for illustration.

[0021] In a basic embodiment, Figure 1-4 As shown, the charging socket includes a mounting flange 1 and a socket insulator mounted on the mounting flange 1. The mounting flange 1 or square plate housing has a flange hole at its edge for fixed connection with the mounting panel of the charging socket, which is the basic carrier of the entire charging socket. The mounting flange 1 is provided with a plug-in cavity for adapting to and inserting the plug-in terminal of the charging gun. The plug-in cavity is through-set from front to back and is connected to a connecting ear plate 212 extending toward the inner side of the plug-in cavity at the rear side. The socket insulator is provided with a connecting structure corresponding to the connecting ear plate 212. The socket insulator is plugged into the plug-in cavity from the front side of the plug-in cavity. The fixed connection between the socket insulator and the mounting flange 1 is achieved by connecting the connecting ear plate and the connecting structure. The socket insulator is provided with a socket terminal mounting hole. The socket terminal is installed in the socket terminal mounting hole and the front end (the end facing the charging gun) is a plug-in end for plugging with the charging terminal of the charging gun, and the rear end is a wiring terminal 302.

[0022] On the basis of the above embodiments, in one embodiment, the socket insulator comprises a block-shaped body whose outer contour matches the inner contour of the plug-in cavity, a hollow tube section extends from the front end of the block-shaped body, and a relief cavity that penetrates the inner cavity of the hollow tube section is provided on the block-shaped body at a position corresponding to the hollow tube section, and the inner cavity of the hollow tube section and the relief cavity constitute a terminal installation cavity for installing the socket terminal. The connecting ear plate 212 is provided at the rear end of the cavity wall of the plug-in cavity, and after the socket insulator is plugged into the plug-in cavity from the front to the back, the rear side surface of the block-shaped body fits with the connecting ear plate 212, and a screw connection hole 232 corresponding to the screw through hole on the connecting ear plate 212 is provided on the block-shaped body, and the block-shaped body is fixedly connected to the connecting ear plate 212 by connecting screws.

[0023] In order to reliably fix the socket insulator, it is better to have more than two connecting ear plates 212, and the number of connecting structures provided on the corresponding socket insulator is equal to the connecting ear plates 212, and multiple connecting ear plates 212 are arranged at intervals around the plug-in cavity.

[0024] In another embodiment, in order to reduce materials and costs, Figure 2-9 As shown, the socket insulator includes an insulating plate body 220, on which a terminal mounting cavity 221 is provided. The inner hole of the terminal mounting cavity 221 is through-through from front to back, and the inner hole of the terminal mounting cavity 221 constitutes a socket terminal mounting hole for mounting a socket terminal. The terminal mounting cavity 221 has cavity sections located on the front and rear sides of the insulating plate body 220, and the cavity section located on the front side of the insulating plate body 220 is located in the plug-in cavity. The rear end of the cavity wall of the plug-in cavity is provided with an extension arm 211 extending backward, and a connecting ear plate 212 is provided at the rear end of the extension arm 211. A rearward extending boss 231 is provided on the insulating plate body, and the connecting structure is a screw connecting hole 232 provided on the rear end surface of the boss 231. The connecting ear plate 212 is provided with a screw through hole, and the socket insulator is fixedly connected to the connecting ear plate 212 by a connecting screw.

[0025] On the basis of the above embodiments, in a preferred embodiment, the outer contour shape of the insulating plate body 220 matches the inner contour shape of the plug-in cavity, and the rear end of the plug-in cavity is provided with an inner flange 240 for stopping the insulating plate body 220 in the backward direction. When the socket insulator is inserted into the plug-in cavity from the front to the back, the insulating plate body 220 can be positioned by the inner flange 240, and the socket insulator can be better fixed in the plug-in cavity with the connecting screws. In this way, after the socket insulator is inserted into the plug-in cavity from the front side of the plug-in cavity, the cavity section of the terminal installation cavity 221 located at the front side of the insulating plate body 220 is in the plug-in cavity, and the cavity section of the terminal installation cavity 221 located at the rear side of the insulating plate body 220 is outside the plug-in cavity.

[0026] like Figure 1-3In the embodiment shown, the charging socket is a multifunctional charging socket capable of both DC charging and AC charging, and has a first plug cavity 10 and a second plug cavity 11, in which a first socket insulator 20 and a second socket insulator 21 are respectively fixedly connected. Of course, in other embodiments, the charging socket may be a DC charging socket or an AC charging socket having only one plug cavity, in which a socket insulator is installed.

[0027] Based on the above embodiments, in one embodiment, Figure 5-6 As shown, the mounting flange 1 includes a flange connecting plate, a flange hole for connecting the mounting panel is provided on the flange connecting plate, a plug-in pipe section extending backward is provided on the flange connecting plate, and the inner cavity of the plug-in pipe section constitutes the plug-in cavity, that is, the inner contour of the plug-in pipe section matches the outer contour of the insertion end of the charging gun. In some embodiments, the plug-in pipe section may have a portion on the front side of the flange connecting plate and a portion on the rear side of the flange connecting plate, or the plug-in pipe section as a whole is on the front side of the flange connecting plate. It can be adjusted according to different usage requirements.

[0028] In the above-mentioned embodiments, especially for the charging socket that takes into account both DC charging and AC charging functions, the assembly method between the socket insulator and the mounting flange 1 greatly reduces the size of the mounting flange 1 and the size of the charging socket. At the same time, when the relative positions of the two socket insulators on the mounting flange 1 are adjusted to meet the needs of different car companies, there is no need to change the structure of the socket insulator, and only the relative positions of the two plug-in cavities on the mounting flange 1 need to be changed, thereby reducing the cost of optimization and adjustment.

[0029] Based on the above embodiments, in one embodiment, the inner wall of the terminal installation cavity is provided with a stop surface facing backwards, and the socket terminal is provided with a convex ring protruding outwards. After the socket terminal is installed into the terminal installation cavity from the back to the front, a terminal pressing sleeve is fixedly installed at the rear end of the terminal installation cavity, which extends into the terminal installation cavity and presses the convex ring against the stop surface, so as to realize the installation of the socket terminal in the terminal installation cavity. In an optimized embodiment, as Figure 4 , 7 -9, in order to facilitate the wiring and installation of the socket terminals, at least some of the socket terminals (such as Fig. 9 The second type of power terminal 30 shown is a socket terminal, and the front end of the terminal installation cavity is provided with an inward-turned edge 207 to stop the front end of the socket terminal, while ensuring that the pin-type charging terminal of the charging gun can be inserted. The terminal installation cavity is provided with a forward-facing stop surface on the rear side of the inward-turned edge 207, and the socket terminal is provided with a stop spring 301 extending radially outward from the front to the back. The socket terminal is inserted into the terminal installation cavity from back to front, and after the stop spring 301 passes over the stop surface, it is stopped in the backward direction by the stop surface. Figure 7As shown, the stop surface can be formed by setting a stop groove 208 on the inner wall of the terminal installation cavity, and the groove wall facing forward of the stop groove 208 constitutes the stop surface. This installation method allows the socket insulator to be fixedly installed in the plug-in cavity first, and then the socket terminal is wired. After the wiring is completed, the terminal installation cavity can be installed from the rear side to the front side of the terminal installation cavity, and the entire assembly process is relatively convenient.

[0030] The connection terminal 302 of the socket terminal can be a crimping connection terminal or a welding connection terminal, which can be selected according to the wire diameter and wire type of the cable connected to the socket terminal. A sealing cover 5 is installed at the rear end of the terminal installation cavity, and a sealing body 50 is installed on the connection terminal 302 at the rear end of the socket terminal. The sealing body 50 is in the terminal installation cavity, and the sealing cover 5 can stop the sealing body 50 in the backward direction.

[0031] Based on the above embodiments, in some optimized embodiments, for example Figure 2 As shown, in order to monitor the temperature of the power terminal, a radially penetrating sensor mounting hole is provided on the cavity wall of the terminal mounting cavity of at least part of the power terminals in the socket terminal, and a temperature sensor 7 with a temperature sensing probe extending into the terminal mounting cavity is inserted into the sensor mounting hole.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A charging socket, characterized in that: The invention comprises a mounting flange (1) and a socket insulator mounted on the mounting flange (1); the mounting flange (1) is provided with a plug-in cavity adapted to be matched with and inserted into a plug-in terminal of a charging gun; the socket insulator is provided with a socket terminal mounting hole; the socket terminal is mounted in the socket terminal mounting hole and has a front end which is a plug-in terminal for plugging into a charging terminal of the charging gun; and a rear end which is a wiring terminal (302); the plug-in cavity is arranged to be through-connected from front to back and has a connecting ear plate (212) extending toward the inner side of the plug-in cavity connected to the rear side; the socket insulator is provided with a connecting structure corresponding to the connecting ear plate (212); the socket insulator is plugged into the plug-in cavity from the front side of the plug-in cavity and is fixedly connected to the mounting flange (1).

2. The charging socket according to claim 1, characterized in that: An extension arm (211) extending backwards is provided at the rear end of the cavity wall of the plug-in cavity, and a connecting ear plate (212) is provided at the rear end of the extension arm (211).

3. The charging socket according to claim 2, characterized in that: The socket insulator comprises an insulating plate body (220), the insulating plate body (220) is provided with a terminal installation cavity (221) which passes through from front to back, the inner hole of the terminal installation cavity (221) constitutes the socket terminal installation hole, the terminal installation cavity (221) has cavity sections located at the front and back sides of the insulating plate body (220), the cavity section located at the front side of the insulating plate body (220) is located in the plug-in cavity, the insulating plate body (220) is provided with a convex column (231) extending backwards, and the connection structure is a screw connection hole (232) provided on the rear end surface of the convex column (231).

4. The charging socket according to claim 2, characterized in that: There are more than two extension arms (211) which are arranged at intervals around the insertion cavity.

5. The charging socket according to claim 3, characterized in that: The outer contour shape of the insulating plate body (220) matches the inner contour shape of the plug-in cavity, and the rear end of the plug-in cavity is provided with an inner flange (240) for blocking the insulating plate body (220) in a backward direction, and after the socket insulator is inserted into the plug-in cavity from the front side of the plug-in cavity, the cavity section of the terminal installation cavity (221) located at the front side of the insulating plate body (220) is located in the plug-in cavity, and the cavity section of the terminal installation cavity (221) located at the rear side of the insulating plate body (220) is located outside the plug-in cavity.

6. The charging socket according to claim 3, characterized in that: A radially penetrating sensor installation hole is provided on a cavity section of at least part of the terminal installation cavity (221) located on the rear side of the insulating plate body (220), and a temperature sensor (7) having a temperature sensing probe inserted into the sensor installation hole and extending into the terminal installation cavity.

7. The charging socket according to any one of claims 1 to 6, characterized in that: The mounting flange (1) comprises a flange connecting plate, the flange connecting plate is provided with a flange hole for connecting with a mounting panel, the flange connecting plate is provided with a plug-in pipe section extending backwards, and the inner cavity of the plug-in pipe section constitutes the plug-in cavity.

8. The charging socket according to any one of claims 3 to 6, characterized in that: At least some of the socket terminals are socket terminals, the front end of the terminal installation cavity is provided with an inwardly turned edge (207) to stop the front end of the socket terminal, a forwardly facing stop surface is provided on the rear side of the inwardly turned edge (207) in the terminal installation cavity, at least some of the socket terminals are provided with a stop spring (301) extending radially outward from the front to the back, and the socket terminal is inserted into the terminal installation cavity from the back to the front and after the stop spring (301) passes over the stop surface, it is stopped in the backward direction by the stop surface.

9. The charging socket according to any one of claims 1 to 6, characterized in that: The charging socket is a charging socket having two plug-in cavities and two socket insulators and capable of taking into account both direct current charging and alternating current charging.

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