Automatic charging head with safety protection function for charging pile

Abstract

The application discloses an automatic charging head with a safety protection function for a charging pile, and relates to the field of charging. The automatic charging head comprises a charging head shell, a conductive block mounting frame, a charging conductive block and a telescopic cylinder body. The conductive block mounting frame is fixedly installed above and below the front end of the charging head shell. The charging conductive block is movably installed at the front end of the conductive block mounting frame. The telescopic cylinder body is located at the rear of the charging head shell. The application can push the whole charging head shell backward, force the charging conductive block and the signal contact rod to separate from the charging port of the vehicle, timely interrupt the charging process, effectively prevent fire accidents and other safety accidents caused by overheating or electrical abnormalities, realize the decoupling of the safety separation and the driving mechanism, ensure that the charging head can reliably separate in an emergency, avoid directly transmitting a huge reverse impact force to the precise telescopic motor and transmission mechanism, and play a role in protecting the driving system.

Description

Technical Field

[0001] This invention relates to the field of charging heads, and in particular to an automatic charging head for charging piles with safety protection functions. Background Technology

[0002] Automatic charging heads for charging stations are important accessories used for charging electric logistics vehicles and electric unmanned vehicles. When a vehicle moves to a designated position next to the charging station, the charging head automatically extends and connects with the vehicle's charging port to enable charging. It is suitable for unattended automatic charging stations for vehicles.

[0003] However, when using a charging head, especially in extreme fault conditions, the charging interface may generate localized high temperatures during charging due to excessive contact resistance, overload, short circuit, or external heat sources, posing a risk of overheating or even fire. Traditional safety protection relies on the electrical system monitoring of the charging pile host and the temperature sensor alarm inside the charging head. However, these measures usually only achieve power cut-off at the circuit level, and the physical connection state of the charging gun remains unchanged. Once the electronic control system completely fails or the interface is at a dangerous thermal runaway critical point, the physical connection point itself may still become a continuous heat source or fault point, posing a safety hazard. In addition, existing charging equipment with emergency disconnection functions often has a disconnection mechanism that is rigidly connected to the drive mechanism. When forced disconnection is required, the huge reverse impact force will directly act on the precision servo motor, transmission screw, or robotic arm joint, which can easily damage these high-value drive components and seriously affect the reliability and service life of the equipment. Summary of the Invention

[0004] The main objective of this invention is to provide an automatic charging head for charging piles with safety protection functions, which can effectively solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An automatic charging head for a charging pile with safety protection functions includes a charging head shell, a conductive block mounting frame, a charging conductive block, and a telescopic cylinder. The conductive block mounting frame is fixedly installed above and below the front end of the charging head shell. The charging conductive block is movably installed at the front end of the conductive block mounting frame. The telescopic cylinder is located at the rear of the charging head shell. Two temperature sensors are fixedly installed between the two conductive block mounting frames at the front end of the charging head shell. Control switches are fixedly installed on both sides of the front end of the charging head shell. Limit hooks are fixedly installed at the output ends of the control switches. Ejection structures are fixedly installed at the top and bottom of the charging head shell. A line mounting terminal and a signal plug are fixedly installed at the top rear of the inner wall of the charging head shell, with the line mounting terminal located to one side of the signal plug. A connection structure is fixedly installed at the bottom rear of the inner wall of the charging head shell.

[0007] As a further embodiment of the present invention, a fitting limiting rod is fixedly installed at the center of the front end of the charging head shell, and signal mounting seats are fixedly installed on both sides of the front end of the charging head shell located on the fitting limiting rod. A signal contact rod is movably installed at the front end of the signal mounting seat, and a limiting slot is opened on both sides of the charging head shell.

[0008] As a further embodiment of the present invention, the ejection structure includes a frame mounting base, an ejection frame, an ejection spring, an ejection plate, and limiting rods. The two frame mounting bases are respectively fixedly installed on the top and bottom of the charging head housing. The ejection frame is movably installed on the front end of the frame mounting base. The ejection spring is fixedly installed on the inner side of the ejection frame. The ejection plate is fixedly installed on the front end of the ejection frame. The two limiting rods are fixedly installed on both sides of the ejection plate.

[0009] As a further embodiment of the present invention, the frame mounting base is embedded into the top and bottom of the charging head housing, and the ejector plate and the limiting link are arranged in a square shape and located in front of the charging head housing.

[0010] As a further embodiment of the present invention, the control switch is embedded in the charging head housing and located behind the limiting link. The limiting hook is attached to the outer side of the limiting link. When the limiting hook is separated from the limiting link, the ejector spring pushes the ejector frame to extend.

[0011] As a further embodiment of the present invention, the charging conductive block is inserted into the conductive block mounting frame and extends and retracts elastically, and the signal contact rod is inserted into the signal mounting base and extends and retracts elastically.

[0012] As a further embodiment of the present invention, the line mounting terminal and the charging conductive block are electrically connected by a line, and the signal plug and the signal contact rod are data connected by a line.

[0013] As a further embodiment of the present invention, the connection structure includes a push-pull linkage, elastic buckles, a mounting connecting plate, a plug-in rod, and a coupling sleeve. The push-pull linkage is fixedly installed on the inner wall of the charging head housing, two elastic buckles are fixedly installed on the rear end of the push-pull linkage, the mounting connecting plate is located on the inner side of the push-pull linkage, the plug-in rod is welded to both sides of the mounting connecting plate, and the coupling sleeve is welded to the rear end of the mounting connecting plate.

[0014] As a further embodiment of the present invention, the push-pull linkage extends to the rear of the charging head housing, the plug rod is inserted into the elastic buckle for connection, and the front end of the piston rod of the telescopic cylinder is inserted into the coupling sleeve for fixed connection.

[0015] As a further embodiment of the present invention, a motor mounting plate is fixedly installed at the rear end of the telescopic cylinder, and a telescopic motor is fixedly installed above the front end of the motor mounting plate. The output end of the telescopic motor is connected to the telescopic cylinder through the motor mounting plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When the temperature sensor on the charging head detects that the temperature of the vehicle charging port exceeds the standard, or when the charging pile host detects abnormal charging data, the charging pile host will send a command to the control switch. The control switch will drive the limit hook to move and release the lock on the limit linkage in the ejection structure. At this time, the pre-stored ejection spring will quickly eject the ejection frame and ejection plate forward. The ejection plate will directly act on the outside of the vehicle charging port, thereby pushing the entire charging head shell backward and forcing the charging conductive block and signal contact rod to separate from the vehicle charging port, interrupting the charging process in time and effectively preventing safety accidents such as fire caused by overheating or electrical abnormalities.

[0017] The charging head shell is connected to the telescopic drive mechanism at the rear via a connecting structure. When the pushing force is greater than the clamping force of the elastic buckle on the plug rod in the connecting structure, the plug rod will disengage from the elastic buckle, causing the charging head shell to disconnect from the piston rod of the telescopic cylinder. This achieves safe separation and decoupling of the drive mechanism. It not only ensures that the charging head can reliably detach in an emergency, but also avoids directly transmitting the huge reverse impact force to the precision telescopic motor and transmission mechanism, thus protecting the drive system. During normal charging, the telescopic motor drives the telescopic cylinder, which in turn pushes and pulls the charging head shell back and forth through the connecting structure to achieve automatic docking and separation with the vehicle charging port. The charging conductive block and signal contact rod are elastically telescopically installed to ensure tight and stable contact with the vehicle charging port, establishing a reliable power and data transmission channel.

[0018] Compared to existing technologies, this device can proactively, quickly, and automatically disconnect the physical connection when danger is detected. Furthermore, the disconnection mechanism avoids damage to its own drive components through a clever disconnectable connection design, significantly improving the safety and reliability of the automatic charging process. It is especially suitable for unattended automatic charging scenarios. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of an automatic charging head for a charging pile with safety protection function according to the present invention;

[0020] Figure 2 This is a rear view of an automatic charging head for a charging pile with safety protection function according to the present invention.

[0021] Figure 3 This is an enlarged view of the charging head shell in an automatic charging head for a charging pile with safety protection function according to the present invention.

[0022] Figure 4 This is an enlarged view of the control switch in an automatic charging head for a charging pile with safety protection function according to the present invention;

[0023] Figure 5 This is an enlarged view of the ejection structure in an automatic charging head for a charging pile with safety protection function according to the present invention.

[0024] Figure 6 This is an enlarged view of the telescopic cylinder in an automatic charging head for a charging pile with safety protection function according to the present invention;

[0025] Figure 7 This is an enlarged view of the connection structure in an automatic charging head for a charging pile with safety protection function according to the present invention;

[0026] Figure 8 This is a structural diagram of the ejector plate ejecting from an automatic charging head for a charging pile with safety protection function according to the present invention.

[0027] In the diagram: 1. Charging head housing; 2. Fitting limit rod; 3. Conductive block mounting frame; 4. Charging conductive block; 5. Limiting slot; 6. Signal mounting base; 7. Signal contact rod; 8. Temperature sensor; 9. Control switch; 10. Limiting hook; 11. Ejection structure; 12. Frame mounting base; 13. Ejection frame; 14. Ejection spring; 15. Ejection plate; 16. Limiting link; 17. Line mounting terminal; 18. Signal plug; 19. Connection structure; 20. Push-pull link; 21. Elastic buckle; 22. Mounting connection plate; 23. Plug-in rod; 24. Coupling sleeve; 25. Telescopic cylinder; 26. Motor mounting plate; 27. Telescopic motor. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0029] like Figures 1-8 As shown, an automatic charging head for charging stations with safety protection functions is presented. Please refer to this document for details. Figures 1-8 The device includes a charging head housing 1, a conductive block mounting frame 3, a charging conductive block 4, and a telescopic cylinder 25. The conductive block mounting frame 3 is fixedly installed above and below the front end of the charging head housing 1. The charging conductive block 4 is movably installed at the front end of the conductive block mounting frame 3. The telescopic cylinder 25 is located at the rear of the charging head housing 1. Two temperature sensors 8 are fixedly installed between the two conductive block mounting frames 3 at the front end of the charging head housing 1. Control switches 9 are fixedly installed on both sides of the front end of the charging head housing 1. Limit hooks 10 are fixedly installed at the output end of the control switches 9. Ejection structures 11 are fixedly installed at the top and bottom of the charging head housing 1. A line mounting terminal 17 and a signal plug 18 are fixedly installed at the top rear of the inner wall of the charging head housing 1, with the line mounting terminal 17 located on one side of the signal plug 18. A connection structure 19 is fixedly installed at the bottom rear of the inner wall of the charging head housing 1.

[0030] Please refer to this carefully. Figure 1 and Figure 3 A fitting limiting rod 2 is fixedly installed at the center of the front end of the charging head shell 1. Signal mounting seats 6 are fixedly installed on both sides of the front end of the charging head shell 1 located on the fitting limiting rod 2. A signal contact rod 7 is movably installed at the front end of the signal mounting seat 6. Limiting slots 5 are opened on both sides of the charging head shell 1.

[0031] Specifically, the line installation terminal 17 and the signal plug 18 are connected to the power supply and data lines of the charging pile, respectively. The charging head shell 1 moves back and forth on the charging pile, so that the charging conductive block 4 and the signal contact rod 7 are connected to the vehicle's charging port, establishing a power input channel and a data transmission channel, enabling the charging pile to charge and monitor charging data.

[0032] Please refer to this carefully. Figure 5 The ejection structure 11 includes a frame mounting base 12, an ejection frame 13, an ejection spring 14, an ejection plate 15, and a limiting link 16. The two frame mounting bases 12 are respectively fixedly installed on the top and bottom of the charging head housing 1. The ejection frame 13 is movably installed on the front end of the frame mounting base 12. The ejection spring 14 is fixedly installed on the inner side of the ejection frame 13. The ejection plate 15 is fixedly installed on the front end of the ejection frame 13. The two limiting links 16 are fixedly installed on both sides of the ejection plate 15.

[0033] Please refer to this carefully. Figure 3 , Figure 5 and Figure 8The frame mounting base 12 is embedded into the top and bottom of the charging head housing 1, and the ejector plate 15 and the limiting link 16 are arranged in a square shape and located in front of the charging head housing 1.

[0034] Please refer to this carefully. Figure 3 , Figure 4 , Figure 5 and Figure 8 The control switch 9 is embedded in the charging head housing 1 and located behind the limiting link 16. The limiting hook 10 is attached to the outside of the limiting link 16. When the limiting hook 10 is separated from the limiting link 16, the ejector spring 14 pushes the ejector frame 13 to extend.

[0035] Specifically, the ejector spring 14 is contracted and fixed inside the frame mounting base 12 to store force. The limit hook 10 limits the limit link 16 to fix the ejector frame 13. When the temperature sensor 8 faces the vehicle's charging port to monitor the temperature, the temperature data is transmitted to the charging pile host. When the charging port temperature exceeds the standard or the charging data is abnormal, the charging pile host sends a switch command to the control switch 9, causing the control switch 9 to drive the limit hook 10 to move to one side. Therefore, the limit link 16 is released, and the elasticity of the ejector spring 14 pushes the ejector frame 13 forward, so that the ejector plate 15 quickly pushes against the outside of the vehicle's charging port, pushing the charging head shell 1 backward as a whole, thereby separating the charging conductive block 4 and the signal contact rod 7 from the vehicle's charging port.

[0036] Please refer to this carefully. Figure 1 and Figure 3 The charging conductive block 4 is inserted into the conductive block mounting frame 3 and extends and retracts elastically, and the signal contact rod 7 is inserted into the signal mounting base 6 and extends and retracts elastically.

[0037] Please refer to this carefully. Figure 2 and Figure 3 The line mounting terminal 17 and the charging conductive block 4 are electrically connected by a line, and the signal plug 18 and the signal contact rod 7 are data connected by a line.

[0038] Specifically, the charging conductive block 4 and the signal contact rod 7 maintain a precise fit when connected to the vehicle charging port through an elastic telescopic structure. The wiring terminal 17 and the signal plug 18 serve to transmit power and data to the charging conductive block 4 and the signal contact rod 7.

[0039] Please refer to this carefully. Figure 6 and Figure 7The connecting structure 19 includes a push-pull link 20, elastic buckles 21, a mounting connecting plate 22, a plug-in rod 23, and a coupling sleeve 24. The push-pull link 20 is fixedly installed on the inner wall of the charging head housing 1. Two elastic buckles 21 are fixedly installed on the rear end of the push-pull link 20. The mounting connecting plate 22 is located on the inner side of the push-pull link 20. The plug-in rod 23 is welded to both sides of the mounting connecting plate 22. The coupling sleeve 24 is welded to the rear end of the mounting connecting plate 22.

[0040] Please refer to this carefully. Figures 6-8 The push-pull linkage 20 extends to the rear of the charging head housing 1, the plug rod 23 is inserted into the elastic buckle 21 for connection, and the front end of the piston rod of the telescopic cylinder 25 is inserted into the coupling sleeve 24 for fixed connection.

[0041] Please refer to this carefully. Figures 6-8 A motor mounting plate 26 is fixedly installed at the rear end of the telescopic cylinder 25, and a telescopic motor 27 is fixedly installed above the front end of the motor mounting plate 26. The output end of the telescopic motor 27 is connected to the telescopic cylinder 25 through the motor mounting plate 26.

[0042] Specifically, the operation of the telescopic motor 27 drives the piston rod inside the telescopic cylinder 25 to extend and retract. Then, the push-pull linkage 20 drives the charging head housing 1 to move back and forth, realizing the connection and separation from the charging port. When the ejector plate 15 pushes the charging head housing 1 backward, the force of the charging head housing 1 is greater than the clamping force of the elastic buckle 21 on the plug rod 23, causing the plug rod 23 to separate from the elastic buckle 21. Therefore, the charging head housing 1 is disconnected from the telescopic cylinder 25, and the charging head housing 1 moves backward outside the telescopic cylinder 25, safely separating the charging head housing 1 from the charging port.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An automatic charging head for a charging pile with safety protection function, comprising a charging head shell (1), a conductive block mounting frame (3), a charging conductive block (4), and a telescopic cylinder (25), wherein the conductive block mounting frame (3) is fixedly installed above and below the front end of the charging head shell (1), the charging conductive block (4) is movably installed at the front end of the conductive block mounting frame (3), and the telescopic cylinder (25) is located behind the charging head shell (1), characterized in that: Two temperature sensors (8) are fixedly installed at the front end of the charging head housing (1) between two conductive block mounting frames (3). Control switches (9) are fixedly installed on both sides of the front end of the charging head housing (1). Limit hooks (10) are fixedly installed at the output end of the control switches (9). Ejection structures (11) are fixedly installed at the top and bottom of the charging head housing (1). A line mounting terminal (17) and a signal plug (18) are fixedly installed at the top rear of the inner wall of the charging head housing (1), and the line mounting terminal (17) is located on one side of the signal plug (18). A connection structure (19) is fixedly installed at the bottom rear of the inner wall of the charging head housing (1).

2. The automatic charging head for a charging pile with safety protection function according to claim 1, characterized in that: The front end center of the charging head shell (1) is fixedly installed with a fitting limiting rod (2), and the front end of the charging head shell (1) is fixedly installed with signal mounting seats (6) on both sides of the fitting limiting rod (2). The front end of the signal mounting seat (6) is movably installed with a signal contact rod (7), and the charging head shell (1) has a limiting slot (5) on both sides.

3. The automatic charging head for a charging pile with safety protection function according to claim 1, characterized in that: The ejection structure (11) includes a frame mounting base (12), an ejection frame (13), an ejection spring (14), an ejection plate (15), and a limiting link (16). The two frame mounting bases (12) are fixedly installed on the top and bottom of the charging head housing (1), respectively. The ejection frame (13) is movably installed on the front end of the frame mounting base (12). The ejection spring (14) is fixedly installed on the inner side of the ejection frame (13). The ejection plate (15) is fixedly installed on the front end of the ejection frame (13). The two limiting links (16) are fixedly installed on both sides of the ejection plate (15).

4. An automatic charging head for a charging pile with safety protection function according to claim 3, characterized in that: The frame mounting base (12) is embedded into the top and bottom of the charging head housing (1), and the ejector plate (15) and the limiting link (16) are arranged in a square shape and located in front of the charging head housing (1).

5. An automatic charging head for a charging pile with safety protection function according to claim 3, characterized in that: The control switch (9) is embedded in the charging head housing (1) and located behind the limiting link (16). The limiting hook (10) is attached to the outside of the limiting link (16). When the limiting hook (10) separates from the limiting link (16), the ejector spring (14) pushes the ejector frame (13) to extend.

6. An automatic charging head for a charging pile with safety protection function according to claim 2, characterized in that: The charging conductive block (4) is inserted into the conductive block mounting frame (3) and extends and retracts elastically, and the signal contact rod (7) is inserted into the signal mounting base (6) and extends and retracts elastically.

7. An automatic charging head for a charging pile with safety protection function according to claim 1, characterized in that: The line mounting terminal (17) and the charging conductive block (4) are electrically connected by a line, and the signal plug (18) and the signal contact rod (7) are data connected by a line.

8. An automatic charging head for a charging pile with safety protection function according to claim 1, characterized in that: The connection structure (19) includes a push-pull link (20), elastic buckles (21), a mounting plate (22), a plug-in rod (23), and a coupling sleeve (24). The push-pull link (20) is fixedly installed on the inner wall of the charging head housing (1). Two elastic buckles (21) are fixedly installed on the rear end of the push-pull link (20). The mounting plate (22) is located on the inner side of the push-pull link (20). The plug-in rod (23) is welded to both sides of the mounting plate (22). The coupling sleeve (24) is welded to the rear end of the mounting plate (22).

9. An automatic charging head for a charging pile with safety protection function according to claim 8, characterized in that: The push-pull linkage (20) extends to the rear of the charging head housing (1), the plug rod (23) is inserted into the elastic buckle (21) for connection, and the front end of the piston rod of the telescopic cylinder (25) is inserted into the coupling sleeve (24) for fixed connection.

10. An automatic charging head for a charging pile with safety protection function according to claim 1, characterized in that: A motor mounting plate (26) is fixedly installed at the rear end of the telescopic cylinder (25), and a telescopic motor (27) is fixedly installed above the front end of the motor mounting plate (26). The output end of the telescopic motor (27) is connected to the telescopic cylinder (25) through the motor mounting plate (26).

Images