An ac charging vehicle plug for electric vehicle conductive charging

Abstract

The utility model discloses an alternating current charging vehicle plug for electric automobile conduction charging, including handle and plug, be provided with waterproof ring between handle and plug, the inside lining is installed in the plug, and the needle is arranged in the middle of inside lining, the rear end of needle is connected with the front end of cable, and the rear end of cable passes through the central passage of handle, the upper portion of plug is provided with the mechanical lock swing board, and the upper surface of plug is fixedly connected with the shaft seat, and the middle of mechanical lock swing board is rotatably connected with the shaft seat through the pivot, and the front end of mechanical lock swing board is matched with the power receiving end through the buckle, the rear end of mechanical lock swing board is provided with the button, the pivot outer surface is equipped with the torsional spring, and the both ends of torsional spring abut on mechanical lock swing board and shaft seat respectively, and the microswitch is fixedly installed on the plug, the utility model discloses overcome the insufficient of prior art, and the needle is fixed through the inside lining and screw in the plug, guarantees electrical connection reliability, realizes the lock state electric signal feedback through microswitch detection state, and promotes charging safety.

Description

Technical Field

[0001] This utility model relates to the field of automotive charging equipment technology, specifically to an AC charging vehicle plug for conductive charging of electric vehicles. Background Technology

[0002] Electric vehicles, as a clean and efficient means of transportation, have been widely adopted and used globally. The accompanying charging infrastructure, especially conductive charging equipment, has become a crucial factor affecting user experience and safety performance.

[0003] As a crucial connecting component between electric vehicles and charging stations, the AC charging plug's reliability, safety, and ease of use directly impact the efficiency and safety of the entire charging process. Currently available AC charging plugs still have several shortcomings in terms of structural design and functional implementation. First, regarding waterproofing, most common plugs use a single sealing ring structure, which is prone to aging and deformation after long-term use, leading to seal failure and posing a risk of water ingress and short circuits. Second, in terms of mechanical locking, most products have complex locking mechanisms, require significant operating force, and have low reliability; some even lack integrated status detection functions, failing to provide real-time feedback on the locking status and creating safety hazards. Furthermore, the internal pin fixing methods of existing plugs are relatively simple, lacking effective positioning and cushioning, making them prone to displacement or poor contact under vibration or impact. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an AC charging plug for conductive charging of electric vehicles. It overcomes these deficiencies with a reasonable design. The plug's internal components, secured by an inner liner and screws, ensure reliable electrical connections. A microswitch detects the status, providing feedback on the locking state and enhancing charging safety.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An AC charging plug for conductive charging of electric vehicles includes a handle and a plug. The plug is fixedly installed at the front end of the handle, and a waterproof ring is provided at the connection between the handle and the plug. An inner liner is fixedly installed inside the plug, and the outer edge of the inner liner is fitted to the inner wall of the plug to form a sealing structure. A pin is inserted through the middle of the inner liner, and a pin hole is opened on the front surface of the plug. The front end of the pin is located in the pin hole. The rear end of the pin is connected to the front end of a cable, and the rear end of the cable passes through the central channel of the handle. A mechanical lock movable plate is provided above the plug, and a shaft seat is fixedly connected to the upper surface of the plug. The mechanical lock movable plate is rotatably connected to the shaft seat through a rotating shaft in the middle. A buckle is provided at the front end of the mechanical lock movable plate, and the buckle engages with the power receiving end. A button is provided at the rear end of the mechanical lock movable plate. A torsion spring is sleeved on the outer surface of the rotating shaft, and the two ends of the torsion spring abut against the mechanical lock movable plate and the shaft seat, respectively. A micro switch is fixedly installed on the plug, and the micro switch is located below the mechanical lock movable plate.

[0006] Preferably, a clamp is fitted on the outer surface of the cable, a cable guard is provided at the rear end of the clamp, and a fixing plate is provided at the rear end of the cable guard. Both the cable guard and the fixing plate are fitted on the outer surface of the cable, and the fixing plate is fixedly connected to the rear end of the handle. The two ends of the cable guard abut against the clamp and the fixing plate, respectively.

[0007] Preferably, the mechanical lock movable plate is located in the inner cavity of the handle, and a button through hole is provided on the upper surface of the handle. The upper end of the button passes through the button through hole and extends to the outside of the handle; the button and the button through hole are fitted with a clearance.

[0008] Preferably, a sealing ring is provided around the outer edge of the button, and the sealing ring is clamped between the button and the handle.

[0009] Preferably, the plug is fixedly connected to the handle by a bolt, the bolt passing through the plug and extending into the front end of the handle, and the bolt is threadedly connected to the handle.

[0010] This invention provides an AC charging plug for conductive charging of electric vehicles, offering the following advantages: A waterproof ring effectively prevents liquid from entering the plug through the assembly gap, ensuring the dryness and insulation of critical electrical components and improving the product's applicability and safety in harsh environments. Furthermore, the internal liner of the plug secures the pins via support posts, achieving precise positioning, support, and isolation. This not only ensures pin alignment during insertion and removal, reducing insertion force and preventing pin misalignment and wear, but also buffers mechanical vibration and tension from the cable, preventing loosening or damage to pin solder joints due to internal stress concentration, thus improving the long-term stability of the electrical connection. The torsion spring maintains a stable locking state for the latch, ensuring the plug and socket will not accidentally detach during charging, thus improving connection reliability. Simultaneously, a microswitch monitors the position of the mechanical lock plate in real time. When the latch completes its locking action, the microswitch is triggered and outputs a signal to the charging system, providing feedback that the plug is reliably connected, ensuring normal startup and operation of the charging process. Conversely, when it is necessary to disconnect the charging connection, the micro switch will lose its trigger signal. Upon receiving this change, the charging system will control and stop the output of the charging current, thereby ensuring that the circuit is in a safe disconnected state before the plug is unplugged, avoiding the risk of arc discharge or equipment damage that may be caused by plugging and unplugging while the power is on. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of this utility model or the prior art will be briefly introduced below.

[0012] Figure 1 A schematic diagram of the structure of this utility model; Explanation of the labels in the diagram: 1. Handle; 2. Plug; 3. Waterproof ring; 4. Liner; 41. Support post; 5. Pin; 6. Pin hole; 7. Cable; 8. Mechanical lock movable plate; 9. Shaft; 10. Shaft seat; 11. Buckle; 12. Button; 13. Torsion spring; 14. Micro switch; 15. Clamp; 16. Cable sleeve; 17. Fixing plate; 18. Button through hole; 19. Bolt. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0014] Example 1, as Figure 1As shown, an AC charging plug for conductive charging of electric vehicles includes a handle 1 and a plug 2. The plug 2 is fixedly installed at the front end of the handle 1, and a waterproof ring 3 is provided at the connection between the handle 1 and the plug 2. An inner liner 4 is fixedly installed inside the plug 2 by bolts. The outer edge of the inner liner 4 is fitted to the inner wall of the plug 2 to form a sealing structure. A plurality of support holes 41 are provided on the surface of the inner liner 4. The pin 5 passes through the support holes 41 and is fixed to the inner liner 4 by the support holes. A pin hole 6 is opened on the front surface of the plug 2, and the front end of the pin 5 is located in the pin hole 6. The rear end of the pin 5 is connected to the front end of the cable 7, and the rear end of the cable 7 passes through the central channel of the handle 1. A mechanical lock movable plate 8 is provided above the plug 2. A shaft seat 10 is fixedly connected to the upper surface of the plug 2. The mechanical lock movable plate 8 is rotatably connected to the shaft seat 10 through a rotating shaft 9 in the middle. A buckle 11 is provided at the front end of the mechanical lock movable plate 8, and the buckle 11 is engaged with the power receiving end. A button 12 is provided at the rear end of the mechanical lock movable plate 8. A torsion spring 13 is sleeved on the outer surface of the rotating shaft 9. The two ends of the torsion spring 13 abut against the mechanical lock movable plate 8 and the shaft seat 10 respectively. A micro switch 14 is fixedly installed on the plug 2 and is located below the mechanical lock movable plate 8.

[0015] Working principle: When plug 2 is inserted into the charging socket of an electric vehicle, the pins 5 on plug 2 form an electrical connection with the corresponding terminals inside the socket, thereby enabling power transmission. Throughout the insertion process, the waterproof ring 3 installed between the mating surfaces of handle 1 and plug 2 effectively prevents liquid from entering the plug through the assembly gap, ensuring the dryness and insulation of critical electrical connection components and improving the product's applicability and safety in harsh environments. Furthermore, the inner liner 4 inside plug 2 fixes the pins 5 through support posts, achieving precise positioning, support, and isolation of the pins 5. This not only ensures the alignment of the pins 5 during insertion and removal, reducing insertion force and preventing pin misalignment and wear, but also buffers mechanical vibration and tension from the cable 7, preventing loosening or damage to the pin solder joints due to internal stress concentration, thus improving the long-term stability of the electrical connection.

[0016] Once the charging connection is established, the latch 11 at the front end of the mechanical lock movable plate 8 automatically engages with the corresponding locking groove of the charging socket, forming a mechanical locking state. The spring force of the torsion spring 13 keeps the latch 11 in a stable locked state, ensuring that the plug and socket will not accidentally detach during charging, thus improving connection reliability. Simultaneously, the micro switch 14 monitors the position of the mechanical lock movable plate 8 in real time. When the latch 11 completes its locking action, the micro switch 14 is triggered and outputs a signal to the charging system, providing feedback on the reliable connection status of the plug, ensuring normal startup and operation of the charging process. Conversely, when it is necessary to disconnect the charging connection, the operator can press the button 12 to rotate the mechanical lock movable plate 8 around the pivot 9, overcoming the spring force of the torsion spring 13, thereby disengaging the latch 11 from the socket locking groove. At this time, the micro switch 14 loses its trigger signal. Upon receiving this change, the charging system controls and stops the output of the charging current, ensuring that the circuit is safely disconnected before the plug is removed, avoiding the risk of arc discharge or equipment damage that may be caused by hot plugging and unplugging.

[0017] In Embodiment Two, as a further preferred embodiment of Embodiment One, a clamp 15 is fitted onto the outer surface of the cable 7. A cable sheath 16 is provided at the rear end of the clamp 15, and a fixing plate 17 is provided at the rear end of the cable sheath 16. Both the cable sheath 16 and the fixing plate 17 are fitted onto the outer surface of the cable 7, and the fixing plate 17 is fixedly connected to the rear end of the handle 1 by bolts. The two ends of the cable sheath 16 abut against the clamp 15 and the fixing plate 17, respectively. Therefore, when fixing the cable 7, the cable 7 passes through the hollow interior of the handle 1. First, the clamp 15 is used to limit and tighten the cable inside, preventing it from moving or twisting within the handle cavity. Then, the cable sheath 16 is fitted onto the outer surface of the cable 7, and its two ends abut against the clamp 15 and the fixing plate 17 to achieve axial limitation. Finally, the fixing plate 17 is fixedly connected to the rear end of the handle 1, thereby further enhancing the fixing effect of the cable 7 at the plug end, effectively preventing loosening of the connection caused by cable bending or external pulling. This greatly reduces the risk of stress being transmitted to the inside of plug 2 and the solder joint of pin 5, thereby protecting the internal electrical connection from damage and extending the service life of the entire charging plug.

[0018] In embodiment three, as a further preferred embodiment one, the mechanical lock movable plate 8 is located in the inner cavity of the handle 1. A button through hole 18 is provided on the upper surface of the handle 1, and the upper end of the button 12 passes through the button through hole 18 and extends to the outside of the handle 1; the button 12 and the button through hole 18 are fitted with a clearance. A sealing ring is provided around the outer edge of the button 12, and the sealing ring is clamped between the button 12 and the handle 1. By installing the mechanical lock movable plate 8 in the inner cavity of the handle 1, the need to add an extra protrusion or complex locking mechanism to the plug body is avoided, making the appearance of the entire plug simpler and more streamlined. Furthermore, placing the button 12 in the button through hole 18 on the surface of the handle 1 allows the operator to easily control the locking and releasing actions by pressing the button 12, without affecting the compactness and aesthetics of the overall structure. By providing a sealing ring around the outer edge of button 12, button 12 can move smoothly in a very small gap, while effectively preventing larger foreign objects (such as dust and debris) and splashed water from directly entering the inner cavity of the handle. This protects the internal mechanical locking mechanism (such as torsion springs and micro switches) and electrical connections from contamination and corrosion, thereby ensuring the long-term reliability and safety of the product.

[0019] In Embodiment Four, as a further preferred embodiment of Embodiment One, the plug 2 is fixedly connected to the handle 1 by a bolt 19. The bolt 19 passes through the plug 2 and extends into the front end of the handle 1, and the bolt 19 is threadedly connected to the handle 1. The bolt 19 tightly fixes the plug and handle into a single unit, effectively resisting complex mechanical stresses and torques, preventing loosening, separation, or shaking between the plug and handle, and ensuring the overall structural integrity and long-term reliability of the product. Furthermore, the bolt 19 itself also acts as a locating pin, ensuring quick and accurate alignment of the plug and handle during assembly, avoiding misalignment. The force generated during insertion and removal operations is directly transmitted to the handle frame via the higher mechanical strength metal bolt 19, forming an optimized force transmission path, protecting other non-load-bearing components, and improving the overall strength of the product.

[0020] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An AC charging vehicle plug for conductive charging of electric vehicles, characterized in that: The device includes a handle (1) and a plug (2). The plug (2) is fixedly installed at the front end of the handle (1), and a waterproof ring (3) is provided at the connection between the handle (1) and the plug (2). An inner liner (4) is fixedly installed inside the plug (2). The outer edge of the inner liner (4) is attached to the inner wall of the plug (2) to form a sealing structure. A pin (5) is inserted through the middle of the inner liner (4). A pin hole (6) is opened on the front surface of the plug (2). The front end of the pin (5) is located in the pin hole (6). The rear end of the pin (5) is connected to the front end of the cable (7). The rear end of the cable (7) passes through the central channel of the handle (1). A mechanical lock movable plate (8) is provided above the plug (2). A shaft seat (10) is fixedly connected to the upper surface of the plug (2). The mechanical lock movable plate (8) is rotatably connected to the shaft seat (10) through a rotating shaft (9) in the middle. A buckle (11) is provided at the front end of the mechanical lock movable plate (8). The buckle (11) is engaged with the power receiving end. A button (12) is provided at the rear end of the mechanical lock movable plate (8). A torsion spring (13) is sleeved on the outer surface of the rotating shaft (9). The two ends of the torsion spring (13) abut against the mechanical lock movable plate (8) and the shaft seat (10) respectively. A micro switch (14) is fixedly installed on the plug (2). The micro switch (14) is located below the mechanical lock movable plate (8).

2. The AC charging vehicle plug for conductive charging of electric vehicles according to claim 1, characterized in that: The cable (7) is fitted with a clamp (15) on its outer surface. A cable guard (16) is provided at the rear end of the clamp (15). A fixing plate (17) is provided at the rear end of the cable guard (16). The cable guard (16) and the fixing plate (17) are both fitted on the outer surface of the cable (7). The fixing plate (17) is fixedly connected to the rear end of the handle (1). The two ends of the cable guard (16) abut against the clamp (15) and the fixing plate (17) respectively.

3. The AC charging vehicle plug for conductive charging of electric vehicles according to claim 1, characterized in that: The mechanical lock movable plate (8) is located in the inner cavity of the handle (1). A button through hole (18) is provided on the upper surface of the handle (1). The upper end of the button (12) passes through the button through hole (18) and extends to the outside of the handle (1). The button (12) and the button through hole (18) are fitted with a clearance.

4. The AC charging vehicle plug for conductive charging of electric vehicles according to claim 1, characterized in that: A sealing ring is provided around the outer edge of the button (12), and the sealing ring is clamped between the button (12) and the handle (1).

5. A plug for AC charging of electric vehicles for conductive charging according to claim 1, characterized in that: The plug (2) is fixedly connected to the handle (1) by a bolt (19). The bolt (19) passes through the plug (2) and extends into the front end of the handle (1). The bolt (19) is threadedly connected to the handle (1).

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