Self-off-control socket and charging device

Abstract

The utility model discloses a self-off-control socket and a charging device, which are characterized in that the self-off-control socket comprises a socket main body, a plug ejection mechanism and an ejection rod limiting part, the plug ejection mechanism and the ejection rod limiting part are arranged in the socket main body, and a socket body matched with a plug in a plugging manner is arranged in the socket main body; the plug ejection mechanism comprises an ejection rod and an ejection rod pushing part, and the ejection rod pushing part has self-resetting force for pushing the ejection rod from the insertion position to the separation position; the ejector rod limiting part comprises a limiting piece movably arranged on the socket main body and a limiting piece driving part for driving the inner end of the limiting piece to be close to or far away from the ejector rod; the ejector rod is provided with a matching part matched with the inner end of the limiting piece, and when the ejector rod is located at the inserting position, the limiting piece limits the ejector rod to move forwards; and when the limiting piece is separated from the matching part, the ejector rod pushing part pushes the ejector rod to move forwards to a separation position. According to the utility model, the adaptability is improved, and the safety is also improved.

Description

Technical Field

[0001] This utility model relates to a charging connector, and more particularly to a self-disengaging socket and charging device. Background Technology

[0002] Many car electrical systems require charging, such as those in emergency vehicles like fire trucks and ambulances. Additionally, many hybrid and pure electric vehicles now exist, all of which also require charging.

[0003] Currently, when charging equipment on fire trucks is in operation, the charging extension cable connected to the fire truck should ideally disconnect automatically after the vehicle starts during an emergency response. This would expedite the response time. Ambulances and other emergency vehicles face similar issues. Furthermore, electric vehicles may sometimes be started and driven without being properly charged, potentially damaging the charging plug and socket and posing a significant safety hazard.

[0004] Current automatic disconnect charging devices on the market, such as the one with application number "2015207852981" and patent title "An Automatic Disconnect Charging Controller for Vehicles," require the charging gun to be hooked by a socket cover during the charging process to prevent the elastic energy storage mechanism from pushing the charging gun out. This has the following drawbacks:

[0005] 1. The plug must have a protrusion that matches the socket cover, but in reality, many charging guns do not have a protrusion, which limits compatibility and reduces the range of applications.

[0006] 2. Socket covers are generally made of plastic. When charging, plastic socket covers are subjected to the external force of the charging gun for a long time, which can easily cause damage.

[0007] 3. When the barb on the socket cover separates from the protrusion of the socket, the friction between the two is relatively large, and there is a possibility that the barb may not be able to separate from the protrusion, causing the plug to fail to disengage properly. When the car drives away, the socket cover may be pulled off or damaged.

[0008] 4. When the barb on the socket cover separates from the protrusion on the socket, the friction between the two is relatively large. Over time, more wear will occur at the connection between the hook and the protrusion, which will lead to the plug and socket not being tightly connected, affecting the stability of charging. Summary of the Invention

[0009] The purpose of this utility model is to provide a self-disengaging socket and charging device. By using this structure, the stability and smoothness of self-disengagement are improved, and the scope of application is expanded.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is: a self-disconnecting socket, comprising:

[0011] The socket body has a socket body inside that mates with the plug.

[0012] A plug ejection mechanism is disposed in the socket body. The plug ejection mechanism includes a push rod and a push rod pushing part. The push rod pushing part has a self-resetting force to push the push rod from the plugged position to the disengaged position.

[0013] A top rod limiting part is installed inside the socket body. The top rod limiting part includes a limiting member that is movably disposed on the socket body and a limiting member driving part that drives the inner end of the limiting member to approach or move away from the top rod.

[0014] The push rod is provided with a mating component that engages with the inner end of the limiting member. When the push rod is in the insertion position, the driving part of the limiting member can drive the inner end of the limiting member to approach the push rod and engage with the mating component, thereby restricting the push rod from moving forward.

[0015] When the limiting member driving part drives the inner end of the limiting member away from the push rod and separates it from the mating component, the push rod pushing part pushes the push rod forward to the disengaged position.

[0016] In the above technical solution, the limiting member driving part includes an electromagnet and a limiting member pushing part. The electromagnet applies a pulling force to the limiting member away from the top rod, and the limiting member pushing part applies a pushing force to the limiting member to move towards the top rod.

[0017] In the above technical solution, the limiting member is disposed on the side of the top rod, the limiting member is disposed between the electromagnet and the top rod, and the electromagnet is connected to the outer end of the limiting member via an intermediate transmission component.

[0018] In the above technical solution, the intermediate transmission component includes a lever and a transmission link. The middle part of the lever is rotatably connected to the main body of the socket. The outer end of the limiting member is provided with a push groove. The first end of the lever is inserted into the push groove. One end of the transmission link is connected to the working end of the electromagnet. The other end of the transmission link is directly opposite the second end of the lever or abuts against the side wall of the second end of the lever.

[0019] In the above technical solution, the end face of the transmission connecting rod facing one end of the lever is an inclined surface, and the inclined surface is set from front to back towards the push rod.

[0020] In the above technical solution, the middle part of the lever is rotatably connected to the socket body via a pivot, and the first end and the second end of the lever are respectively located on both sides of the pivot.

[0021] When the electromagnet is working, it drives the working end of the electromagnet and the transmission link to move forward, and pushes the lever to rotate in the first direction through the transmission link, so that the first end of the lever drives the limiting member to separate from the mating component.

[0022] In the above technical solution, the socket body is provided with an installation cavity communicating with the front end face of the socket body, and the push rod and the push rod pushing part are disposed in the installation cavity;

[0023] The push rod pushing part is a first compression spring, which is sleeved on the outer surface of the push rod. A first annular protrusion is provided on the outer surface of the push rod on the front side of the mating component. The rear end of the first compression spring abuts against the middle or rear end face of the mounting cavity, and the front end of the first compression spring abuts against the rear end face of the first annular protrusion. The first compression spring gives the first annular protrusion a self-resetting force to move forward.

[0024] In the above technical solution, the limiting member pushing part is a second compression spring, and the second compression spring gives the limiting member a thrust to move toward the top rod.

[0025] In the above technical solution, the mating component is a limiting groove or a limiting ring, and the limiting groove or limiting ring is disposed on the outer surface of the top rod;

[0026] And / or, the end face of the limiting member facing the top rod is a guide slope, which is inclined from front to back toward the top rod.

[0027] This utility model also provides a charging device, including the above-mentioned self-disconnecting socket, and also includes a plug, wherein the plug is inserted into the socket body;

[0028] And / or, the plug is provided with an outer coating.

[0029] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0030] 1. In this utility model, the push rod is limited by a push rod limiting part. After the car is started, the electromagnet will be energized, thereby releasing the limit on the push rod. Then, the push rod is used to push the plug out, realizing automatic disengagement. Compared with the previous method of using a socket cover to limit the charging gun (plug) and push rod, the push rod limiting part directly limits the push rod inside the socket body, eliminating the need to limit the charging gun. This can improve the compatibility of the socket body with different plugs, expand the scope of application, and at the same time prevent the socket cover from being damaged, reducing the maintenance rate.

[0031] 2. In this utility model, when the plug and socket bodies are inserted, the top rod can be pushed backward, and the limiting part can be automatically inserted into the top rod to limit the top rod through the pushing part of the limiting part. When the plug and socket bodies are inserted, there is no need to hook the plug with the socket cover, which improves the convenience of charging operation and enhances the user experience.

[0032] 3. In this utility model, even if the push rod fails to push the plug out smoothly, the plug can be separated by the movement of the socket when the vehicle is driven away, and the socket cover will not be damaged. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the self-disconnecting socket in Embodiment 1 of this utility model;

[0034] Figure 2 yes Figure 1 Exploded view;

[0035] Figure 3 This is a cross-sectional view of the charging device in Embodiment 1 of this utility model (with the top rod in the insertion position when the plug and socket are plugged in).

[0036] Figure 4 This is a cross-sectional view of the charging device in Embodiment 1 of this utility model (with the top rod in the disengaged position and the plug pushed out of the socket body);

[0037] Figure 5 yes Figure 3 A partial enlarged view of the connection between the middle plug ejection mechanism and the push rod limiting part.

[0038] The components are as follows: 1. Socket body; 2. Plug; 3. Socket body; 4. Push rod; 5. Push rod pushing part; 6. Limiting component; 7. Mating component; 8. Plug rod; 9. Electromagnet; 10. Limiting component pushing part; 11. Toggle lever; 12. Transmission connecting rod; 13. Push groove; 14. Rotating shaft; 15. Inclined surface; 16. Mounting cavity; 17. First annular protrusion; 18. Guide inclined surface; 19. Rear cover; 20. Cover plate; 21. Display screen. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0040] Example 1: See Figure 1-5 As shown, a self-disconnecting socket includes:

[0041] The socket body 1 has a socket body 3 inside which a plug 2 is inserted and mated;

[0042] A plug ejection mechanism is provided inside the socket body 3. The plug ejection mechanism includes a push rod 4 and a push rod pushing part 5. The push rod pushing part 5 has a self-resetting force to push the push rod 4 from the plugged position to the disengaged position.

[0043] The top rod limiting part is installed inside the socket body 1. The top rod limiting part includes a limiting member 6 that is movably disposed on the socket body 1 and a limiting member driving part that drives the inner end of the limiting member 6 to approach or move away from the top rod 4.

[0044] The push rod 4 is provided with a mating part 7 that engages with the inner end of the limiting member 6. When the push rod 4 is in the insertion position, the driving part of the limiting member can drive the inner end of the limiting member 6 to approach the push rod 4 and engage with the mating part 7, thereby restricting the push rod 4 from moving forward.

[0045] When the limiting member driving part drives the inner end of the limiting member 6 away from the top rod 4 and separates it from the mating part 7, the top rod pushing part 5 pushes the top rod 4 forward to the disengaged position.

[0046] In this embodiment, the plug 2 has a plug rod 8 that mates with the push rod. The front end of the socket body is connected to the front end face of the socket main body. The plug is inserted into the socket body from the front end of the socket main body (the socket body has wiring terminals) to achieve electrical connection, thereby enabling charging of the vehicle (or other devices that require a charging gun, such as electric vehicles) through the plug and socket body. When the plug and socket are not plugged in, the self-resetting force of the push rod pushing part pushes the push rod forward, placing the push rod in the disengaged position. When the plug and socket are plugged in, the plug rod abuts against the push rod and pushes the push rod backward. After the plug and socket are plugged in, the limiting member driving part drives the inner end of the limiting member to approach the push rod and mates with the mating part, restricting the forward movement of the push rod. That is, the self-resetting force of the push rod pushing part is restricted by the limiting member, and at this time the plug and socket can be stably mated. When the plug and socket need to be separated, the limiting member drive unit drives the limiting member away from the push rod, causing the limiting member and the mating parts to separate. At this time, the limiting force of the limiting member on the push rod disappears, and the self-resetting force of the push rod drive unit pushes the push rod forward, moving the push rod from the plugged position to the disengaged position. During this process, the push rod can push the plug rod forward and simultaneously drive the plug forward to disengage from the socket body, thereby realizing the plug automatically disengaging from the socket body and achieving the self-disengagement action.

[0047] The limiting member driving part includes an electromagnet 9 and a limiting member pushing part 10. The electromagnet 9 provides a pulling force to the limiting member 6 away from the push rod 4, and the limiting member pushing part provides a pushing force to the limiting member 6 towards the push rod 4.

[0048] In this embodiment, taking the socket body installed on a vehicle as an example, the electromagnet is connected to the car's power supply system. When the car is parked and ready to charge, the power supply system disconnects the electrical connection with the electromagnet (at this time, the electromagnet is not working, and when the electromagnet is not working, it will not exert a pulling force on the limiting member to move away from the push rod). When the car starts, the power supply system supplies power to the electromagnet (at this time, the electromagnet is working, and when the electromagnet is working, it exerts a pulling force on the limiting member to move away from the push rod). Therefore, during charging, since the electromagnet is not working, the limiting member pushing part will push the limiting member towards the push rod, and cooperate with the mating part to prevent the push rod from moving forward and pushing the plug out. After the car's ignition system powers the electromagnet (in cases where the plug is forgotten to be manually unplugged from the socket, or where the car is started beforehand knowing the plug is not unplugged), the electromagnet is powered. The electromagnet exerts a pulling force on the limiting member, moving it away from the push rod and overcoming the pushing force of the limiting member's pusher. This causes the limiting member to move away from the push rod and separate from the mating parts. At this point, the self-resetting force of the push rod's drive unit pushes the push rod forward, pushing the plug forward to detach from the socket, achieving automatic separation of the plug and socket. In this method, when the user knows the plug is not unplugged, no manual external force is required to unplug it, improving user convenience and experience (the most conventional method requires manual unplugging, which is inconvenient). Furthermore, if the user forgets to unplug the plug, starting the car will automatically push the plug out of the socket, reducing the risk of damage to the plug and socket and minimizing safety hazards.

[0049] See Figure 3-5 As shown, the limiting member 6 is disposed on the side of the top rod 4, and the limiting member 6 is disposed between the electromagnet 9 and the top rod 4. The electromagnet 9 is connected to the outer end of the limiting member 6 via an intermediate transmission component.

[0050] In this embodiment, the limiting member is positioned perpendicular to the axis of the top rod. The socket body has a groove that mates with the limiting member, allowing the limiting member to slide within the groove and restricting its movement. The limiting member can be positioned above, below, to the left, to the right of the top rod, or outside the circumference of the top rod. Preferably, in this embodiment, the limiting member is positioned above the top rod, allowing it to move up and down within the socket body. The electromagnet is positioned above the limiting member.

[0051] See Figure 3-5As shown, the intermediate transmission component includes a lever 11 and a transmission link 12. The middle part of the lever 11 is rotatably connected to the socket body 1. The outer end of the limiting member 6 is provided with a push groove 13. The first end of the lever 11 is inserted into the push groove 13. One end of the transmission link 12 is connected to the working end of the electromagnet 9, and the other end of the transmission link 12 is opposite to the second end of the lever 11 or abuts against the side wall of the second end of the lever 11. In this embodiment, the top of the transmission link is connected to the working end of the rear end of the electromagnet, and the bottom of the transmission link abuts against the top surface of the second end of the lever. In this way, the electromagnet is set parallel to the top rod, which can also reduce the space occupied by the width of the socket body, making the entire socket look smaller.

[0052] The middle part of the lever 11 is rotatably connected to the socket body 1 via the pivot 14. The first end and the second end of the lever 11 are respectively located on both sides of the pivot 14. In this embodiment, the first end is located on the front side of the pivot and the second end is located on the rear side of the pivot.

[0053] When the electromagnet is working, it drives the working end of the electromagnet and the transmission rod to move forward, and through the transmission rod, it pushes the lever to rotate in the first direction (the lever is always tilted from front to back towards the top rod; in this embodiment, the lever is always tilted from right to front to back and downward), causing the first end of the lever to separate the limiting member from the mating component. When the electromagnet is not working, the limiting member pushing part pushes the limiting member downward and closer to the top rod. At this time, when the limiting member moves downward, the push groove also moves downward, which drives the lever to rotate in the second direction. At the same time, since the electromagnet is not energized, the lever also provides a pushing force to the transmission rod, causing the transmission rod and the working end of the electromagnet to move backward. The first direction and the second direction are opposite.

[0054] The end face of the transmission connecting rod 12, which faces the lever 11, is an inclined surface 15. The inclined surface 15 is set from front to back towards the push rod 4. In this embodiment, the bottom surface of the lever is an inclined surface, and the working end of the electromagnet is an electromagnet push rod. When the electromagnet is working, it moves forward and drives the transmission connecting rod to move forward. The inclined surface is set from front to back downward. In this embodiment, the first direction is clockwise, the second direction is counterclockwise, the rotating shaft is set behind the limiting member, and the rotating shaft is located behind the through groove. When the electromagnet is working, it drives the transmission connecting rod to move forward. The inclined surface of the transmission connecting rod pushes the lever to rotate clockwise. The front end of the lever will face upward. Then, the top of the lever abuts against the top of the push groove and pushes the limiting member to move upward and separate from the mating part. Then, the push rod pushing part pushes the push rod to move forward and pushes the plug out. When the car is parked and ready to charge, the electromagnet is de-energized. The limiting member pusher pushes the limiting member downward, causing the top of the push groove to move down and rotating the lever counterclockwise. The rear end of the lever moves upward, driving the transmission link and the electromagnet working part to move backward through the inclined plane (the front end of the inclined plane is higher than the rear end, so the rotation of the lever can push the transmission link to move backward). At this time, the bottom of the limiting member abuts against the top outer surface of the push rod (the mating part is in front of the limiting member, and the mating part and the inner end of the limiting member are not mated). During the process of inserting the plug into the socket, it will push the push rod and the mating part to move backward until the mating part is directly opposite the limiting member. At this time, the limiting member will engage with the mating part, thereby limiting the push rod to move forward and push the plug out. When it is necessary to push the plug out, the electromagnet is energized and works, causing the limiting member to move upward and separate from the mating part. The push rod drive can then push the push rod forward and push the plug forward to automatically disengage from the socket. Of course, a sensor or other detection component can also be set at the rear end of the push rod. After the plug and socket are connected, the push rod moves backward to the predetermined position. When the mating component is aligned with the limiter, the sensor or other detection component detects that the push rod has moved backward into place. At this time, the electromagnet is de-energized (without de-energizing the electromagnet in advance). The limiter pusher pushes the limiter to move downward and cooperate with the mating component to restrict the push rod from moving forward.

[0055] See Figure 3-5 As shown, the socket body 3 has a mounting cavity 16 that communicates with the front end face of the socket body 3, and the push rod 4 and the push rod pushing part 5 are disposed in the mounting cavity 16;

[0056] The push rod pushing part 5 is a first compression spring, which is sleeved on the outer surface of the push rod 4. A first annular protrusion 17 is provided on the outer surface of the push rod 4 on the front side of the mating part 7. The rear end of the first compression spring abuts against the middle or rear end face of the mounting cavity 16, and the front end of the first compression spring abuts against the rear end face of the first annular protrusion 17. The first compression spring gives the first annular protrusion 17 a self-resetting force to move forward.

[0057] Preferably, the mounting cavity is a stepped hole, including a front hole and a rear hole coaxially arranged. The diameter of the front hole is smaller than the diameter of the rear hole, and the diameter of the front hole is smaller than the diameter of the first annular protrusion. The diameter of the front hole matches or is slightly larger than the diameter of the push rod. The diameter of the rear hole matches or is slightly larger than the diameter of the first annular protrusion. The first annular protrusion is located inside the rear hole. In this configuration, when the first compression spring pushes the first annular protrusion forward, it is stopped when it reaches the front end of the rear hole, thus limiting the forward movement distance of the push rod. When the plug and socket are inserted, the push rod and the first annular protrusion are pushed backward, further compressing the first compression spring. When the rear end of the push rod abuts against the rear wall of the rear hole, or after the plug and socket are inserted, the mating parts are directly opposite the limiting member, thus limiting the forward movement of the push rod. When the electromagnet is energized, the limiting member moves upward and separates from the mating parts. In this embodiment, the first compression spring is always in a compressed state. Therefore, the self-resetting force of the first compression spring will push the push rod forward, pushing the plug rod and plug forward and disengaging them from the socket body. The rear end of the first compression spring is located on the front side of the limiting member, thus not affecting the engagement between the limiting member and the mating components, and the first compression spring does not affect the normal movement of the limiting member.

[0058] Of course, the first annular protrusion can be omitted. The rear end of the first compression spring is directly fixedly connected to the inner surface of the middle part of the mounting cavity, and the front end of the first compression spring is directly fixedly connected to the outer surface of the push rod. The first compression spring is always in a compressed state, so that the first compression spring can also give the push rod a forward self-resetting force.

[0059] See Figure 3-5 As shown, the limiting member pushing part 5 is a second compression spring, which provides a thrust to the limiting member 6 to move toward the top rod 4. In this embodiment, the second compression spring is sleeved on the outer surface of the limiting member. The outer end (top) of the second compression spring is connected to or abuts against the socket body. The inner end (bottom) of the second compression spring is fixed to the outer surface of the limiting member, or a protrusion or groove is provided on the outer surface of the limiting member. The inner end of the second compression spring abuts against the protrusion or is located in the groove, thereby ensuring that the second compression spring always provides a thrust to the limiting member to move toward the top rod.

[0060] See Figure 5 As shown, the end face of the limiting member 6 facing the top rod 4 is a guide slope 18, which is inclined from front to back towards the top rod 4; in this embodiment, the guide slope is inclined from right front to back downward.

[0061] The mating component 7 is a limiting groove or a limiting ring, which is disposed on the outer surface of the top rod 4.

[0062] In this embodiment, the mating component is a limiting groove. When the push rod is in the insertion position, the inner end (bottom) of the limiting member is inserted into the limiting groove, and the rear end face of the limiting member abuts against the rear sidewall of the limiting groove, thereby restricting the first compression spring from pushing the push rod forward. The limiting groove adopts an annular groove structure, ensuring that even if the push rod rotates, the limiting member will be stably inserted into the limiting groove. If the mating component is a limiting ring, when the mating component and the limiting ring are engaged, the bottom of the limiting member is in front of the limiting ring, and the rear sidewall of the limiting member contacts the front sidewall of the limiting ring, preventing the push rod from moving forward. The presence of the guide ramp allows for the following: When the car is ready to charge and the electromagnet is de-energized, the push rod has already moved forward. At this time, the limiting ring is in front of the limiting component, and the bottom of the limiting component abuts against the top outer surface of the push rod. When the plug and socket are connected, the push rod is pushed backward, and the limiting ring also moves backward. The rear side of the limiting ring will first contact the guide ramp. As the limiting ring continues to move backward, it compresses the guide ramp, causing the limiting component to move upward a portion until the limiting ring has completely passed the bottom of the limiting component. Then, the thrust of the second compression spring will push the limiting component downward and place it in front of the limiting ring, thus limiting the push rod.

[0063] See Figure 2 As shown, a rear cover 19 is also installed on the back of the socket body 1. The socket body 3, the plug ejection mechanism, and the push rod limiting part are disposed between the socket body 3 and the rear cover 19. The rear cover is used to cover and seal the components inside the socket body, and a sealing gasket is also placed between the socket body and the rear cover to play a waterproof role.

[0064] A cover plate 20 is provided on the front side of the socket body 1. Preferably, the top of the cover plate is rotatably connected to the front side wall of the socket body, and a torsion spring is used at the rotatable connection so that the bottom of the cover plate rotates downward to cover the socket body (the front end of the socket body is the charging port). A display screen 21 can also be provided on the front side wall of the socket body to display charging information.

[0065] This utility model also provides a charging device, including the above-mentioned self-disconnecting socket, and also includes a plug, wherein the plug 2 is inserted into the socket body;

[0066] The plug has an outer rubber coating. This coating is integrally injection molded with the plug's outer shell, resulting in higher quality and a better feel.

[0067] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. For instance, the two components can be mechanically connected by contact or abutting; they can also be directly hooked or connected by an intermediate medium; or they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A self-disconnecting socket, characterized in that: include: The socket body has a socket body inside that mates with the plug. A plug ejection mechanism is disposed in the socket body. The plug ejection mechanism includes a push rod and a push rod pushing part. The push rod pushing part has a self-resetting force to push the push rod from the plugged position to the disengaged position. A top rod limiting part is installed inside the socket body. The top rod limiting part includes a limiting member that is movably disposed on the socket body and a limiting member driving part that drives the inner end of the limiting member to approach or move away from the top rod. The push rod is provided with a mating component that engages with the inner end of the limiting member. When the push rod is in the insertion position, the driving part of the limiting member can drive the inner end of the limiting member to approach the push rod and engage with the mating component, thereby restricting the push rod from moving forward. When the limiting member driving part drives the inner end of the limiting member away from the push rod and separates it from the mating component, the push rod pushing part pushes the push rod forward to the disengaged position.

2. The self-disconnecting socket according to claim 1, characterized in that: The limiting member driving part includes an electromagnet and a limiting member pushing part. The electromagnet applies a pulling force to the limiting member away from the push rod, and the limiting member pushing part applies a pushing force to the limiting member to move towards the push rod.

3. The self-disconnecting socket according to claim 2, characterized in that: The limiting member is disposed on the side of the top rod, and is disposed between the electromagnet and the top rod. The electromagnet is connected to the outer end of the limiting member via an intermediate transmission component.

4. The self-disconnecting socket according to claim 3, characterized in that: The intermediate transmission component includes a lever and a transmission link. The middle part of the lever is rotatably connected to the main body of the socket. The outer end of the limiting member is provided with a push groove. The first end of the lever is inserted into the push groove. One end of the transmission link is connected to the working end of the electromagnet. The other end of the transmission link is opposite to the second end of the lever or abuts against the side wall of the second end of the lever.

5. The self-disconnecting socket according to claim 4, characterized in that: The end face of the transmission connecting rod directly opposite the lever is an inclined surface, which is inclined from front to back towards the push rod.

6. The self-disengaging socket according to claim 4 or 5, characterized in that: The middle part of the lever is rotatably connected to the main body of the socket via a pivot, and the first end and the second end of the lever are respectively located on both sides of the pivot. When the electromagnet is working, it drives the working end of the electromagnet and the transmission link to move forward, and pushes the lever to rotate in the first direction through the transmission link, so that the first end of the lever drives the limiting member to separate from the mating component.

7. The self-disconnecting socket according to claim 1, characterized in that: The socket body has a mounting cavity communicating with the front end face of the socket body, and the push rod and push rod pushing part are disposed in the mounting cavity; The push rod pushing part is a first compression spring, which is sleeved on the outer surface of the push rod. A first annular protrusion is provided on the outer surface of the push rod on the front side of the mating component. The rear end of the first compression spring abuts against the middle or rear end face of the mounting cavity, and the front end of the first compression spring abuts against the rear end face of the first annular protrusion. The first compression spring gives the first annular protrusion a self-resetting force to move forward.

8. The self-disconnecting socket according to claim 2, characterized in that: The limiting member pushing part is a second compression spring, which provides a thrust to the limiting member to move toward the top rod.

9. The self-disconnecting socket according to claim 2, characterized in that: The mating component is a limiting groove or a limiting ring, which is disposed on the outer surface of the top rod; And / or, the end face of the limiting member facing the top rod is a guide slope, which is inclined from front to back toward the top rod.

10. A charging device, characterized in that: The socket includes the self-disengaging socket as described in any one of claims 1-9, and further includes a plug, the plug being inserted into the socket body; And / or, the plug is provided with an outer coating.

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