A DC charging connector

Abstract

The present invention relates to the field of connector technology, and specifically to a DC charging connector, comprising an outer shell, an inner cylinder, a trigger member and a plurality of terminals. The inner cylinder is installed in the outer shell, and the outer shell can rotate relative to the inner cylinder about a first direction, and the trigger member can be installed on the inner cylinder so as to rotate about the first direction. A DC charging connector of the present invention cooperates with an outer shell, an inner cylinder, a trigger member and a plurality of terminals. When the DC charging connector is plugged into a charging pile socket, the inner cylinder and the outer shell are separated so that the inner cylinder and the outer shell can rotate relative to each other, which can minimize the torque on the terminals in the inner cylinder and avoid mutual wear with the terminals in the charging pile socket, reduce the damage to the terminals, and increase the service life of the terminals.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a DC charging connector. Background Art

[0002] When charging an electric vehicle, the charging gun on the charging pile needs to be inserted into the charging port of the charging pile socket reserved in the vehicle body to provide power for the vehicle. There are two ways to charge electric vehicles: AC charging and DC charging. The advantage of DC charging over AC charging is mainly reflected in the charging speed. Since DC charging directly inputs electrical energy into the battery, it reduces the number of voltage and current conversions, so its charging efficiency is higher and the battery can be fully charged in a shorter time.

[0003] However, DC charging connectors also have some disadvantages. Due to the large charging current of DC charging connectors, the cables of DC charging connectors are usually thick and heavy. Therefore, during the charging process, the gravity of the cable or external force will cause torque pulling on the connection between the charging gun and the charging pile socket, damaging the terminals of the connection between the charging gun and the charging pile, affecting the firmness of the connection, and even causing the connection to loosen. Summary of the invention

[0004] The present invention provides a DC charging connector to solve the problem that, during the charging process, the gravity of the cable or an external force may cause torque pulling on the connection between a charging gun and a charging pile socket, thereby affecting the firmness of the connection and even causing the connection to become loose.

[0005] A DC charging connector of the present invention adopts the following technical scheme: a DC charging connector, used for plugging with a charging pile socket, comprises an outer shell, an inner cylinder, a trigger member and a plurality of terminals; the inner cylinder is installed in the outer shell, and the outer shell can rotate relative to the inner cylinder around a first direction, and the first direction is the direction in which the DC charging connector is plugged with the charging pile socket; a plurality of terminals are evenly distributed around the first direction in the inner cylinder, and the plurality of terminals are fixedly connected to the inner cylinder; a cable is fixedly connected to the outer shell, and a plurality of wires inside the cable are respectively arranged corresponding to a plurality of terminals, and each terminal is connected to a wire corresponding to the plurality of terminals; the trigger member can be rotatably installed on the inner cylinder around a first direction, and the DC charging connector has a first state and a second state. When in the first state, the trigger member and the outer shell are restricted from rotating relative to the inner cylinder around the first direction; when in the second state, the trigger member and the outer shell are allowed to rotate relative to the inner cylinder around the first direction. In the initial state, the DC charging connector is in the first state.

[0006] Furthermore, a limiting groove is provided on the outer circumferential wall surface of the inner cylinder, the limiting groove having a first end and a second end, the first end being located on a side of the second end close to the charging pile socket along the first direction, and the dimension of the first end around the first direction being smaller than the dimension of the second end around the first direction; the trigger member comprises a slider, the slider extends outward from the shell along the second direction, the second direction is perpendicular to the first direction, the slider can slide in the limiting groove along the first direction, the dimension of the slider around the first direction is equal to the dimension of the first end of the limiting groove around the first direction, and when the DC charging connector is in the first state, the slider abuts against the first end of the limiting groove, and when the DC charging connector is in the second state, the slider abuts against the second end of the limiting groove.

[0007] Furthermore, the slider is installed in the limiting groove through a first elastic member, and the first elastic member is arranged along the first direction.

[0008] Furthermore, it also includes an outer pressure cylinder and an inner pressure cylinder, the outer pressure cylinder is sleeved on the outer shell and coaxially arranged with the inner cylinder, the outer pressure cylinder is located on the side of the slider away from the charging pile socket along the first direction, and when the slider moves a preset distance relative to the outer shell along the first direction toward the side away from the charging pile socket, it can drive the outer pressure cylinder to move, and the moving direction of the outer pressure cylinder is the same as the moving direction of the slider; a boss is fixedly arranged on the outer shell, and the outer pressure cylinder can abut against the boss when it moves relative to the outer shell along the first direction toward the side away from the charging pile socket; the inner pressure cylinder is sleeved in the outer shell and coaxially arranged with the inner cylinder, in the initial state, the inner pressure cylinder is located on the side of the outer pressure cylinder away from the slider along the first direction, and when the outer pressure cylinder moves relative to the outer shell along the first direction toward the side away from the charging pile socket, it can drive the inner pressure cylinder to move, and the moving direction of the inner pressure cylinder is opposite to the moving direction of the outer pressure cylinder, the inner pressure cylinder is connected to the inner cylinder through a second elastic member, the second elastic member is arranged along the first direction, the inner cylinder can be movably arranged along the first direction, and in the initial state, the inner cylinder and the end of the outer shell close to the charging pile socket along the first direction are on the same plane.

[0009] Furthermore, a hydraulic channel is opened on the outer shell, and hydraulic oil is arranged in the hydraulic channel. The inner pressure cylinder and the outer pressure cylinder are connected through the hydraulic channel, so that when the outer pressure cylinder moves along the first direction relative to the outer shell toward the side away from the charging pile socket, it can drive the inner pressure cylinder to move, and make the moving direction of the inner pressure cylinder opposite to the moving direction of the outer pressure cylinder.

[0010] Furthermore, the hydraulic channel includes a first section, a second section and a connecting section, the first section and the second section are both arranged along the first direction, the first section and the second section are connected through the connecting section, the outer pressure cylinder is slidingly sealed with the first section, the inner pressure cylinder is slidingly sealed with the second section, and in an initial state, the outer pressure cylinder is allowed to move along the first direction toward the side close to the connecting section, and the inner pressure cylinder is allowed to move along the first direction toward the side away from the connecting section.

[0011] Furthermore, a first magnet is provided at the junction of the second section and the connecting section, and a second magnet is provided at one end of the inner pressure cylinder close to the connecting section along the first direction. In an initial state, the first magnet and the second magnet attract each other.

[0012] Furthermore, a buckle is provided in the shell, and when the slider slides to the second end of the limiting groove, the buckle can be engaged with the charging pile socket.

[0013] Furthermore, the number of the sliding block and the number of the limiting grooves are both two.

[0014] Furthermore, an installation channel is provided in the housing, the cross section of the installation channel in the first direction is arc-shaped, and the cross-sectional area of ​​the installation channel in the first direction is larger than the cross-sectional area of ​​the cable in the first direction.

[0015] The beneficial effects of the present invention are as follows: a DC charging connector of the present invention cooperates by setting an outer shell, an inner cylinder, a trigger member and a plurality of terminals. When the DC charging connector is plugged into a charging pile socket, since the DC charging connector is in a first state in an initial state, the trigger member and the outer shell are restricted from rotating relative to the inner cylinder about a first direction, that is, the trigger member locks the outer shell and the inner cylinder at this time, so that the outer shell and the inner cylinder can be synchronously plugged into the charging pile socket, and at the beginning of the plugging, the terminals on the inner cylinder can be accurately aligned with the terminals in the charging pile socket, thereby ensuring the accuracy of the plugging. As the plugging proceeds, when the DC charging connector and the charging pile socket are plugged in, the DC charging connector is in the second state, at which time the trigger member and the shell are allowed to rotate relative to the inner cylinder around the first direction. Therefore, if the cable is subjected to external force during use and generates torque around the first direction, or the cable's own gravity generates torque around the first direction, the shell fixed to the cable will rotate relative to the inner cylinder around the first direction, that is, the inner cylinder and the shell are separated so that the inner cylinder and the shell can rotate relative to each other, which can minimize the torque on the terminals in the inner cylinder and avoid mutual wear with the terminals in the charging pile socket, reduce terminal damage, and increase the service life of the terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of the overall structure of an embodiment of a DC charging connector of the present invention;

[0018] Figure 2A front view of the overall structure of an embodiment of a DC charging connector of the present invention;

[0019] Figure 3 for Figure 2 Sectional view along AA;

[0020] Figure 4 for Figure 3 The enlarged view of the X in the middle;

[0021] Figure 5 for Figure 2 Sectional view along the middle line BB;

[0022] Figure 6 for Figure 5 The enlarged view of the Y position in the middle;

[0023] Figure 7 The figure is a schematic structural diagram of an inner cylinder of an embodiment of a DC charging connector of the present invention.

[0024] In the figure: 100, outer shell; 110, boss; 120, buckle; 130, hydraulic channel; 140, installation channel; 200, inner cylinder; 210, limit groove; 300, trigger member; 310, slider; 320, first elastic member; 400, terminal; 500, cable; 510, wire; 600, outer pressure cylinder; 700, inner pressure cylinder; 710, second elastic member. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] An embodiment of a DC charging connector of the present invention is as follows Figures 1 to 7 shown.

[0027] A DC charging connector, used for plugging with a charging pile socket, includes a shell 100, an inner cylinder 200, a trigger 300 and a plurality of terminals 400. The inner cylinder 200 is installed in the shell 100, and the shell 100 can rotate relative to the inner cylinder 200 around a first direction, and the first direction is the direction in which the DC charging connector is plugged with the charging pile socket. The plurality of terminals 400 are evenly distributed around the first direction in the inner cylinder 200, and the plurality of terminals 400 are fixedly connected to the inner cylinder 200. A cable 500 is fixedly connected to the shell 100, and the plurality of wires 510 inside the cable 500 are respectively arranged corresponding to the plurality of terminals 400, and each terminal 400 is connected to the wire 510 arranged correspondingly thereto.

[0028] The trigger member 300 is mounted on the inner cylinder 200 so as to be rotatable in a first direction. The DC charging connector has a first state and a second state. When in the first state, the trigger member 300 and the outer shell 100 are restricted from rotating in the first direction relative to the inner cylinder 200. When in the second state, the trigger member 300 and the outer shell 100 are allowed to rotate in the first direction relative to the inner cylinder 200. In the initial state, the DC charging connector is in the first state.

[0029] In this embodiment, the outer shell 100, the inner cylinder 200, the trigger member 300 and the plurality of terminals 400 are arranged to cooperate. When the DC charging connector is plugged into the charging pile socket, since the DC charging connector is in the first state in the initial state, the trigger member 300 and the outer shell 100 are restricted from rotating around the first direction relative to the inner cylinder 200. That is, the trigger member 300 locks the outer shell 100 and the inner cylinder 200, so that the outer shell 100 and the inner cylinder 200 can be plugged into the charging pile socket synchronously. At the beginning of the plugging, the terminals 400 on the inner cylinder 200 can be accurately aligned with the terminals 400 in the charging pile socket, thereby ensuring the accuracy of the plugging.

[0030] As the plugging proceeds, when the DC charging connector and the charging pile socket are plugged in, the DC charging connector is in the second state, at which time the trigger member 300 and the outer shell 100 are allowed to rotate relative to the inner cylinder 200 around the first direction. Therefore, if the cable 500 is subjected to an external force during use and generates a torque around the first direction, or the torque around the first direction is generated due to the gravity of the cable 500 itself, the outer shell 100 fixed to the cable 500 will be rotated relative to the inner cylinder 200 around the first direction. That is, in this embodiment, the inner cylinder 200 and the outer shell 100 are separated so that the inner cylinder 200 and the outer shell 100 can rotate relative to each other, which can minimize the wear of the terminal 400 in the inner cylinder 200 and the terminal 400 in the charging pile socket due to the torque, reduce the damage to the terminal 400, and increase the service life of the terminal 400.

[0031] In this embodiment, a limiting groove 210 is provided on the outer peripheral wall surface of the inner cylinder 200. The limiting groove 210 has a first end and a second end. The first end is located on a side of the second end close to the charging pile socket along the first direction. The dimension of the first end around the first direction is smaller than the dimension of the second end around the first direction. The trigger member 300 includes a slider 310. The slider 310 extends outward from the housing 100 along the second direction. The second direction is perpendicular to the first direction. The slider 310 can slide in the limiting groove 210 along the first direction. The dimension of the slider 310 around the first direction is equal to the dimension of the first end of the limiting groove 210 around the first direction. When the DC charging connector is in the first state, the slider 310 abuts against the first end of the limiting groove 210. When the DC charging connector is in the second state, the slider 310 abuts against the second end of the limiting groove 210.

[0032] Specifically, the slider 310 is installed in the limiting groove 210 through the first elastic member 320, the first elastic member 320 is arranged along the first direction, and the first elastic member 320 is a spring. In this embodiment, the slider 310 and the limiting groove 210 are both provided in two. Alternatively, in other embodiments, the slider 310 and the limiting groove 210 are both provided in multiples. The multiple limiting grooves 210 are evenly distributed around the first direction in the circumferential direction of the inner cylinder 200, and each slider 310 is slidably installed in one limiting groove 210.

[0033] The housing 100 is provided with a sliding groove, which is arranged along a first direction, and the slider 310 can slide in the sliding groove.

[0034] In this embodiment, by providing the limiting groove 210, the DC charging connector is in the first state in the initial state, and the slider 310 abuts against the first end of the limiting groove 210. Since the dimension of the slider 310 around the first direction is equal to the dimension of the first end of the limiting groove 210 around the first direction, the slider 310 and the housing 100 are restricted from rotating relative to the inner cylinder 200 around the first direction.

[0035] When the DC charging connector is plugged into the charging pile socket, the slider 310 is brought into contact with the end face of the charging pile socket, and the housing 100 is held and moved along the first direction toward the side close to the charging pile socket for plugging. At this time, the slider 310 moves from the first end of the limiting groove 210 to the second end of the limiting groove 210 along the first direction relative to the housing 100, compressing the first elastic member 320. As the slider 310 slides in the limiting groove 210, when the DC charging connector and the charging pile socket are plugged in, the DC charging connector is in the second state. At this time, the slider 310 is brought into contact with the second end of the limiting groove 210. Since the size of the first end around the first direction is smaller than the size of the second end around the first direction, that is, the size of the slider 310 around the first direction is smaller than the size of the second end around the first direction, when the plugging is completed, the slider 310 and the housing 100 are allowed to rotate around the first direction relative to the inner cylinder 200. That is, when the housing 100 rotates around the first direction relative to the inner cylinder 200, the slider 310 will be driven to rotate around the first direction at the second end of the limiting groove 210.

[0036] In this embodiment, a DC charging connector further includes an outer pressure cylinder 600 and an inner pressure cylinder 700, wherein the outer pressure cylinder 600 is sleeved on the outside of the housing 100 and is coaxially arranged with the inner cylinder 200, and the outer pressure cylinder 600 is located on the side of the slider 310 away from the charging pile socket along the first direction, and when the slider 310 moves a preset distance away from the charging pile socket along the first direction relative to the housing 100, the outer pressure cylinder 600 can be driven to move, and the moving direction of the outer pressure cylinder 600 is the same as the moving direction of the slider 310. A boss 110 is fixedly arranged on the housing 100, and the outer pressure cylinder 600 can abut against the boss 110 when it moves away from the charging pile socket along the first direction relative to the housing 100, and after the outer pressure cylinder 600 abuts against the boss 110, the slider 310 can continue to slide in the limiting groove 210, and the first elastic member 320 can continue to be compressed.

[0037] The inner pressure cylinder 700 is sleeved in the outer shell 100 and is coaxially arranged with the inner cylinder 200. In the initial state, the inner pressure cylinder 700 is located on the side of the outer pressure cylinder 600 away from the slider 310 along the first direction, and when the outer pressure cylinder 600 moves relative to the outer shell 100 along the first direction toward the side away from the charging pile socket, it can drive the inner pressure cylinder 700 to move, and the moving direction of the inner pressure cylinder 700 is opposite to the moving direction of the outer pressure cylinder 600. The inner pressure cylinder 700 is connected to the inner cylinder 200 through a second elastic member 710, and the second elastic member 710 is arranged along the first direction. The second elastic member 710 is a spring, and the inner cylinder 200 can be movably arranged along the first direction, and in the initial state, the inner cylinder 200 and the end of the outer shell 100 close to the charging pile socket along the first direction are on the same plane.

[0038] In this embodiment, a buckle 120 is provided in the housing 100 , and when the slider 310 slides to the second end of the limiting groove 210 , the buckle 120 can be engaged with the charging pile socket.

[0039] An installation channel 140 is provided in the housing 100 . The cross section of the installation channel 140 in the first direction is arc-shaped, and the cross-sectional area of ​​the installation channel 140 in the first direction is larger than the cross-sectional area of ​​the cable 500 in the first direction, so that the cable 500 can swing in the installation channel 140 .

[0040] The housing 100 is provided with an installation opening, through which one end of the cable 500 passes, and after passing through the installation channel 140, is connected to the terminal 400 through the wire 510 inside the cable 500. The cable 500 is fixedly connected to the housing 100 at the installation opening.

[0041] In this embodiment, a hydraulic channel 130 is opened on the outer shell 100, and hydraulic oil is arranged in the hydraulic channel 130. The inner pressure cylinder 700 and the outer pressure cylinder 600 are connected through the hydraulic channel 130, so that when the outer pressure cylinder 600 moves along the first direction relative to the outer shell 100 toward the side away from the charging pile socket, it can drive the inner pressure cylinder 700 to move, and make the moving direction of the inner pressure cylinder 700 opposite to the moving direction of the outer pressure cylinder 600.

[0042] Specifically, the hydraulic channel 130 includes a first section, a second section and a connecting section. The first section and the second section are both arranged along the first direction. The first section and the second section are connected through the connecting section. The outer pressure cylinder 600 is slidingly sealed with the first section, and the inner pressure cylinder 700 is slidingly sealed with the second section. In the initial state, the outer pressure cylinder 600 is allowed to move along the first direction toward the side close to the connecting section, and the inner pressure cylinder 700 is allowed to move along the first direction toward the side away from the connecting section.

[0043] Furthermore, a first magnet is disposed at the junction of the second section and the connecting section, and a second magnet is disposed at one end of the inner pressure cylinder 700 close to the connecting section along the first direction. In the initial state, the first magnet and the second magnet attract each other, so that in the initial state, the inner cylinder 200 will occupy the entire space of the first section. For details, see the attached Figure 6 shown.

[0044] In this embodiment, an outer pressure cylinder 600 and an inner pressure cylinder 700 are provided. When the DC charging connector is plugged into the charging pile socket, the slider 310 is brought into contact with the end face of the charging pile socket, and the housing 100 is held and moved along the first direction into the socket of the charging pile socket for plugging. At this time, the slider 310 moves along the first direction in the limiting groove 210 toward the side away from the charging pile socket, compressing the first elastic member 320. As the slider 310 slides in the limiting groove 210, before the slider 310 reaches the second end of the limiting groove 210, the slider 310 will be brought into contact with the outer pressure cylinder 600 and drive the outer pressure cylinder 600 to move synchronously. The movement of the outer pressure cylinder 600 will push the hydraulic oil in the hydraulic channel 130 to move, and then the inner pressure cylinder 700 will be prompted to move along the first direction toward the side close to the charging pile socket through the hydraulic oil, compressing the second elastic member 710. The compression of the second elastic member 710 will further prompt the inner cylinder 200 to move along the first direction toward the side close to the charging pile socket, that is, in the process of the DC charging connector and the charging pile socket, the inner cylinder 200 and the terminal 400 inside it will move along the first direction toward the side close to the charging pile socket relative to the outer shell 100.

[0045] When the outer pressure cylinder 600 abuts against the boss 110 on the outer shell 100, the outer shell 100 continues to move, which will drive the outer pressure cylinder 600 to move synchronously along the first direction toward the side close to the charging pile socket. The movement of the outer pressure cylinder 600 no longer continues to cause the inner cylinder 200 and the terminal 400 inside it to move relative to the outer shell 100 along the first direction toward the side close to the charging pile socket. When the outer shell 100 drives the outer pressure cylinder 600 to move, the slider 310 will continue to move in the limiting groove 210 along the first direction toward the side away from the charging pile socket, and compress the first elastic member 320 until the slider 310 slides to the second end of the limiting groove 210. At this time, the end of the outer shell 100 close to the charging pile socket along the first direction is again on the same plane as the end of the inner cylinder 200 close to the charging pile socket along the first direction, and the buckle 120 is engaged with the charging pile socket, completing the plugging of the DC charging connector and the charging pile socket.

[0046] When charging is completed and the DC charging connector needs to be unplugged, the operator pulls the outer shell 100 to move along the first direction away from the charging pile socket. Due to the action of the second elastic member 710, the inner cylinder 200 will not move first, that is, at this time, the outer shell 100 will move along the first direction away from the charging pile socket relative to the inner cylinder 200. As the outer shell 100 is pulled out, driven by the first elastic member 320 and the second elastic member 710, the inner cylinder 200 will also be pulled out, and the first elastic member 320, the second elastic member 710, the inner pressure cylinder 700 and the outer pressure cylinder 600 are all reset to the first state.

[0047] That is, in this embodiment, by arranging the inner pressure cylinder 700 and the outer pressure cylinder 600 and other structures to cooperate with each other, when the DC charging connector is unplugged from the charging pile socket, the outer shell 100 can be detached from the charging pile socket before the inner cylinder 200, which to a certain extent reduces the impact of the difficulty of unplugging on the terminal 400 in the inner cylinder 200 at the moment of starting to unplug, and the compressed first elastic member 320 and the second elastic member 710 can both play a role in assisting the unplugging to a certain extent, thereby reducing the difficulty of unplugging.

[0048] In combination with the above embodiments, the specific working process is as follows:

[0049] In the initial state, the DC charging connector is in the first state, and the slider 310 abuts against the first end of the limiting groove 210. Since the size of the slider 310 around the first direction is equal to the size of the first end of the limiting groove 210 around the first direction, the slider 310 and the housing 100 are restricted from rotating relative to the inner cylinder 200 around the first direction.

[0050] When plugging the DC charging connector into the charging pile socket, the slider 310 is brought into contact with the end face of the charging pile socket, and the housing 100 is held and moved along the first direction toward the socket hole close to the charging pile socket for plugging. At this time, the slider 310 will move relative to the housing 100 in the limiting groove 210 along the first direction toward the side away from the first end of the limiting groove 210, compressing the first elastic member 320. As the slider 310 slides in the limiting groove 210, before the slider 310 reaches the second end of the limiting groove 210, the slider 310 will be brought into contact with the external pressure cylinder 600 and drive the external pressure cylinder 600 to move synchronously. That is, the outer pressure cylinder 600 will also move along the first direction away from the charging pile socket. The movement of the outer pressure cylinder 600 will push the hydraulic oil in the hydraulic channel 130 to move, and then the hydraulic oil will cause the inner pressure cylinder 700 to move along the first direction toward the charging pile socket, compressing the second elastic member 710. The compression of the second elastic member 710 will further cause the inner cylinder 200 to move along the first direction toward the charging pile socket. That is, in the process of the DC charging connector and the charging pile socket, the inner cylinder 200 and the terminal 400 inside it will move relative to the outer shell 100 along the first direction toward the charging pile socket.

[0051] When the outer pressure cylinder 600 abuts against the boss 110 on the outer shell 100, the outer shell 100 continues to move, which will drive the outer pressure cylinder 600 to move synchronously along the first direction toward the side close to the charging pile socket. The movement of the outer pressure cylinder 600 no longer continues to cause the inner cylinder 200 and the terminal 400 inside it to move relative to the outer shell 100 along the first direction toward the side close to the charging pile socket. When the outer shell 100 drives the outer pressure cylinder 600 to move, the slider 310 will continue to move in the limiting groove 210 along the first direction toward the side away from the charging pile socket, and compress the first elastic member 320 until the slider 310 slides to the second end of the limiting groove 210, and the DC charging connector is in the second state. At this time, the end of the outer shell 100 close to the charging pile socket along the first direction is again on the same plane as the end of the inner cylinder 200 close to the charging pile socket along the first direction, and the buckle 120 is engaged with the charging pile socket, completing the plugging of the DC charging connector and the charging pile socket.

[0052] When the DC charging connector is connected to the charging pile socket, the DC charging connector is in the second state, at which the trigger member 300 and the outer shell 100 are allowed to rotate relative to the inner cylinder 200 around the first direction. Therefore, if the cable 500 is subjected to an external force during use and generates a torque around the first direction, or the cable 500 generates a torque around the first direction due to its own gravity, the outer shell 100 fixed to the cable 500 will rotate relative to the inner cylinder 200 around the first direction. That is, in this embodiment, the inner cylinder 200 and the outer shell 100 are separated so that the inner cylinder 200 and the outer shell 100 can rotate relative to each other, which can minimize the wear of the terminal 400 in the inner cylinder 200 and the terminal 400 in the charging pile socket due to the torque, reduce the damage to the terminal 400, and increase the service life of the terminal 400.

[0053] When charging is completed and the DC charging connector needs to be unplugged, the operator pulls the outer shell 100 to move along the first direction away from the charging pile socket. Due to the action of the second elastic member 710, the inner cylinder 200 will not move first, that is, at this time, the outer shell 100 will move along the first direction away from the charging pile socket relative to the inner cylinder 200. As the outer shell 100 is pulled out, driven by the first elastic member 320 and the second elastic member 710, the inner cylinder 200 will also be pulled out, and the first elastic member 320, the second elastic member 710, the inner pressure cylinder 700 and the outer pressure cylinder 600 are all reset to the first state. That is, in this embodiment, by arranging the inner pressure cylinder 700 and the outer pressure cylinder 600 and other structures to cooperate with each other, when the DC charging connector is unplugged from the charging pile socket, the outer shell 100 can be detached from the charging pile socket before the inner cylinder 200, which to a certain extent reduces the impact of the difficulty of unplugging on the terminal 400 in the inner cylinder 200 at the moment of starting to unplug, and the compressed first elastic member 320 and the second elastic member 710 can both play a role in assisting the unplugging to a certain extent, thereby reducing the difficulty of unplugging.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC charging connector, used for plugging into a charging pile socket, characterized in that: It comprises an outer shell, an inner cylinder, a trigger member and a plurality of terminals; the inner cylinder is installed in the outer shell, and the outer shell can rotate relative to the inner cylinder around a first direction, and the first direction is the direction in which the DC charging connector is plugged into the charging pile socket; a plurality of terminals are evenly distributed in the inner cylinder around the first direction, and a plurality of terminals are fixedly connected to the inner cylinder; a cable is fixedly connected to the outer shell, and a plurality of wires inside the cable are respectively arranged corresponding to a plurality of terminals, and each terminal is connected to a wire arranged correspondingly thereto; the trigger member can be installed on the inner cylinder so as to rotate around a first direction, and the DC charging connector has a first state and a second state, and when in the first state, the trigger member and the outer shell are restricted from rotating relative to the inner cylinder around the first direction; when in the second state, the trigger member and the outer shell are allowed to rotate relative to the inner cylinder around the first direction, and the DC charging connector is in the first state in the initial state; A limiting groove is provided on the outer circumferential wall surface of the inner cylinder, the limiting groove has a first end and a second end, the first end is located on a side of the second end close to the charging pile socket along the first direction, and the dimension of the first end around the first direction is smaller than the dimension of the second end around the first direction; the trigger member includes a slider, the slider extends outward from the shell along the second direction, the second direction is perpendicular to the first direction, the slider can slide in the limiting groove along the first direction, the dimension of the slider around the first direction is equal to the dimension of the first end of the limiting groove around the first direction, and when the DC charging connector is in the first state, the slider abuts against the first end of the limiting groove, and when the DC charging connector is in the second state, the slider abuts against the second end of the limiting groove; the slider is installed in the limiting groove through a first elastic member, and the first elastic member is arranged along the first direction; it also includes an outer pressure cylinder and an inner pressure cylinder, the outer pressure cylinder is sleeved on the shell and coaxially arranged on the inner cylinder, the outer pressure cylinder is located on the side of the slider away from the charging pile socket along the first direction, and when the slider moves a preset distance relative to the shell along the first direction to the side away from the charging pile socket, it can drive the outer pressure cylinder to move, and The moving direction of the outer pressure cylinder is the same as the moving direction of the slider; a boss is fixedly arranged on the outer shell, and the outer pressure cylinder can abut against the boss when it moves relative to the outer shell along the first direction away from the charging pile socket; the inner pressure cylinder is sleeved in the outer shell and coaxially arranged with the inner cylinder. In the initial state, the inner pressure cylinder is located on the side of the outer pressure cylinder away from the slider along the first direction, and when the outer pressure cylinder moves relative to the outer shell along the first direction away from the charging pile socket, it can drive the inner pressure cylinder to move, and the moving direction of the inner pressure cylinder is opposite to the moving direction of the outer pressure cylinder, the inner pressure cylinder is connected to the inner cylinder through a second elastic member, the second elastic member is arranged along the first direction, the inner cylinder can be movably arranged along the first direction, and in the initial state, the inner cylinder and the end of the outer shell close to the charging pile socket along the first direction are in the same plane; a hydraulic channel is opened on the outer shell, and hydraulic oil is arranged in the hydraulic channel, the inner pressure cylinder and the outer pressure cylinder are connected through the hydraulic channel, and then when the outer pressure cylinder moves relative to the outer shell along the first direction away from the charging pile socket, it can drive the inner pressure cylinder to move, and the moving direction of the inner pressure cylinder is opposite to the moving direction of the outer pressure cylinder.

2. A DC charging connector according to claim 1, characterized in that: The hydraulic channel includes a first section, a second section and a connecting section. The first section and the second section are both arranged along the first direction. The first section and the second section are connected through the connecting section. The outer pressure cylinder is slidingly sealed with the first section, and the inner pressure cylinder is slidingly sealed with the second section. In an initial state, the outer pressure cylinder is allowed to move along the first direction toward the side close to the connecting section, and the inner pressure cylinder is allowed to move along the first direction toward the side away from the connecting section.

3. A DC charging connector according to claim 2, characterized in that: A first magnet is disposed at the junction of the second section and the connecting section, and a second magnet is disposed at one end of the inner pressure cylinder close to the connecting section along the first direction. In an initial state, the first magnet and the second magnet attract each other.

4. A DC charging connector according to claim 1, characterized in that: A buckle is arranged inside the shell, and when the slider slides to the second end of the limiting groove, the buckle can be engaged with the charging pile socket.

5. A DC charging connector according to claim 1, characterized in that: The number of the sliding block and the number of the limiting slots are both two.

6. A DC charging connector according to claim 1, characterized in that: An installation channel is arranged in the shell, the cross section of the installation channel in the first direction is arc-shaped, and the cross-sectional area of ​​the installation channel in the first direction is larger than the cross-sectional area of ​​the cable in the first direction.

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