A new energy vehicle charging gun

Abstract

This invention relates to the field of new energy vehicle charging equipment, and in particular to a new energy vehicle charging gun. Addressing the problems of existing charging guns where the cable is easily damaged and the charging gun remains connected even after power is cut off, this invention provides a new energy vehicle charging gun. A tension spring connects the charging head to the inner wall of the charging gun housing. Correspondingly, thermally expandable metal clip structures for fixing annular cylinders are installed on opposite sides inside the charging gun housing. A heat-conducting component is provided between the charging head and the thermally expandable metal clip structures. When the thermally expandable metal clip structures expand due to heat, they release their fixing effect on the annular cylinders. During use, this device can sense the heat of the charging head while it is charging the new energy vehicle. When the charging head becomes abnormally hot, it moves into the charging gun housing under the pull of the tension spring and disengages from the new energy vehicle charging port, thus de-energizing the charging head and preventing it from reconnecting to the new energy vehicle charging port.

Description

Technical Field

[0001] This invention relates to the field of charging equipment for new energy vehicles, and in particular to a charging gun for new energy vehicles. Background Technology

[0002] With consumers' increasing awareness of environmental protection and energy conservation, and the continuous advancement and cost reduction of new energy vehicle technology, the new energy vehicle market has experienced explosive growth. New energy vehicles, with their independently developed advanced technologies and unique designs, have begun to stand out in the market. Simultaneously, the export volume of new energy vehicles is also increasing, becoming a new highlight of China's automotive industry. As a bridge connecting vehicles and charging equipment, the development of new energy vehicle charging guns is closely linked to the rise of the new energy vehicle industry. Currently, charging guns are generally connected to charging piles via cables to provide power. During long-term use and frequent bending, the connection between the cable and the charging gun is easily damaged. Furthermore, due to the high power consumption of new energy vehicles during charging, frequent charging in hot weather can easily lead to overheating of the charging gun's charging head. Although existing charging guns automatically cut off power when the temperature is too high, the electrode plates of the charging head and the electrode plates of the charging port remain connected, which can easily damage the car battery when the voltage is unstable. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a new energy vehicle charging gun, effectively solving the problems mentioned in the background section.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows:

[0005] A new energy vehicle charging gun includes a charging gun housing, a charging head, a charging gun socket and a cable connected to the charging head. A charging gun rod is fixedly connected to the front end of the charging gun housing. A protective component for protecting the cable is installed at the front end of the charging gun rod. The rear end of the charging gun housing is slidably connected to the charging head. A sandwich groove is opened on the front side of the rear end of the charging gun housing. An annular cylinder that can move back and forth is slidably connected inside the sandwich groove. When the charging head moves forward, the annular cylinder moves backward.

[0006] A tension spring connects the charging head to the inner wall of the charging gun housing. Correspondingly, thermal expansion metal clip structures for fixing annular cylinders are installed on both sides inside the charging gun housing. When the charging head is removed from the charging gun housing, the tension spring is in a stretched state. A heat-conducting component is provided between the charging head and the thermal expansion metal clip structure. When the thermal expansion metal clip structure expands due to heat, it releases the fixing effect with the annular cylinder. A push cylinder that can push the annular cylinder to reset is fixedly connected to the end of the charging gun socket corresponding to the charging head.

[0007] Furthermore, the protective component includes a threaded tube fixedly connected to the front end of the charging gun rod. Multiple evenly distributed limiting blocks are fixedly connected to the circumferential surface of the front end of the threaded tube. A control tube is threadedly connected to the surface of the threaded tube. A sliding tube is rotatably connected to the front end of the control tube. Multiple limiting grooves that slide in connection with the limiting blocks are respectively opened on the inner wall of the sliding tube. Multiple evenly distributed spring plates are fixedly connected to the front end of the sliding tube. A connecting plate with a central opening is fixedly connected to the front end of the spring plate. The connecting plate is sleeved on the surface of the cable. A clamping structure for clamping the cable is connected to the front end of the connecting plate.

[0008] Furthermore, the clamping structure includes multiple threaded clamping plates fixedly connected to the front end of the connecting plate. The front diameter of the threaded clamping plates is smaller than the rear diameter. A reinforcing knob is threadedly connected to the surface of the multiple threaded clamping plates. When the reinforcing knob moves toward the connecting plate, it can push the multiple threaded clamping plates to swing inward.

[0009] Furthermore, sub-plates are fixedly connected to the corresponding two sides of the front end of the charging head, and the sub-plates are slidably connected to the inner wall of the charging gun housing. One end of the tension spring is fixedly connected to the sub-plate, and the other end of the tension spring is fixedly connected to the front end of the inside of the charging gun housing.

[0010] A first control cylinder is fixedly connected to the front end of the charging head. A second control cylinder is coaxially arranged at the front end of the first control cylinder. The second control cylinder is sleeved on the surface of the first control cylinder. The front end of the second control cylinder is rotatably connected to the inner wall of the charging gun housing. An annular plate is coaxially fixedly connected to the inner side of the annular cylinder. The annular plate is sleeved on the surface of the second control cylinder.

[0011] The surfaces of the first control cylinder and the second control cylinder are respectively provided with a first spiral groove and a second threaded groove. The inner wall of the second control cylinder is fixedly connected with a first pin, which meshes with the first spiral groove. The inner wall of the annular plate is fixedly connected with a second pin, which meshes with the second spiral groove.

[0012] Furthermore, connecting plates are fixedly connected to the corresponding two sides of the circumferential surface of the annular plate, and the other end of the connecting plates is fixedly connected to the inner wall of the annular cylinder. Movable openings are respectively opened on the inner wall of the charging gun housing at positions corresponding to the connecting plates.

[0013] Furthermore, the thermal expansion metal buckle includes two corresponding movable plates. The upper sides of the inner wall of the interlayer groove are respectively provided with mounting grooves on both sides, and the bottom of the mounting groove is respectively provided with connecting slide grooves. The bottom of the movable plates is respectively fixedly connected with connecting sliders, which are slidably connected to the connecting slide grooves. The inner ends of the connecting sliders are respectively fixedly connected with return springs, and the other ends of the return springs are respectively fixedly connected to the inner wall of the connecting slide grooves.

[0014] Hooks are fixedly connected to the upper end of the movable plate, and fixing grooves are opened on the surface of the annular cylinder at the positions corresponding to the hooks, and the hooks engage with the fixing grooves; support plates are provided at the outer ends of the movable plate, and the support plates are fixedly connected to the bottom of the mounting groove. A thermal expansion metal sheet is fixedly connected to one end of the support plate and the movable plate, and the upper end of the thermal expansion metal sheet is connected to the heat-conducting component.

[0015] This invention features a novel structure, ingenious design, and simple and convenient operation, offering the following advantages compared to existing technologies:

[0016] 1. When this device is in use, it can sense the heat of the charging head during the charging process of the charging head for new energy vehicles. When the charging head heats up abnormally and the temperature of the charging head is too high, the charging head will move into the charging gun housing under the pull of the tension spring and disconnect from the charging port of the new energy vehicle, so that the charging head is de-energized and no longer connected to the charging port of the new energy vehicle, thereby avoiding the charging head from continuing to heat up and causing damage to the charging head and the charging port of the new energy vehicle.

[0017] 2. During use, when the cable is bent under force, the spring plate can bend accordingly and support the cable, preventing damage from excessive bending and avoiding stretching of the cable during bending, which would affect the connection between the cable and the charging head.

[0018] 3. When this device is in use, if the overheated charging head is inserted into the charging gun socket, the intake fan will rotate to draw outside air into the installation space so that the charging head can be used quickly. The air will then be discharged through the exhaust fan. During the air circulation process, the heat of the charging head can be effectively carried away, allowing the charging head to dissipate heat quickly and effectively, making it convenient for the user. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a new energy vehicle charging gun according to the present invention.

[0020] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the charging gun housing of a new energy vehicle charging gun according to the present invention.

[0021] Figure 3 This is a schematic diagram of the tension spring connection structure of a new energy vehicle charging gun according to the present invention.

[0022] Figure 4 This is an exploded view of the installation structure of the first and second control cylinders of a new energy vehicle charging gun according to the present invention.

[0023] Figure 5 This is a schematic diagram of the thermal expansion metal clip structure of a new energy vehicle charging gun according to the present invention.

[0024] Figure 6 This is a partial schematic diagram of the thermal expansion metal clip structure of a new energy vehicle charging gun according to the present invention.

[0025] Figure 7 This is a cross-sectional schematic diagram of the charging gun housing structure of a new energy vehicle charging gun according to the present invention.

[0026] Figure 8 This is a schematic diagram of the installation structure of the protective component of a new energy vehicle charging gun according to the present invention.

[0027] Figure 9 This is a cross-sectional schematic diagram of the control tube installation structure of a new energy vehicle charging gun according to the present invention.

[0028] Figure 10 This is a schematic diagram of the heat dissipation component structure of a new energy vehicle charging gun according to the present invention.

[0029] Numbering in the diagram: 1-Charging gun housing, 2-Charging head, 3-Charging gun socket, 4-Charging gun rod, 5-Handle, 6-Sub-plate, 7-First control cylinder, 8-Second control cylinder, 9-Annular cylinder, 10-Tension spring, 11-Interlayer groove, 12-First spiral groove, 13-First pin, 14-Second spiral groove, 15-Second pin, 16-Annular plate, 17-Fixing groove, 18-Hook, 19-Connecting slider, 20-Reset spring, 21-Mounting groove, 22-First heat-conducting plate, 23-Second heat-conducting plate, 24-Second connector, 25-First 26-Connector, 27-Support plate, 28-Thermal expansion metal sheet, 29-Moving plate, 30-Threaded pipe, 31-Limiting block, 32-Sliding pipe, 33-Control pipe, 34-Spring plate, 35-Connecting plate, 36-Threaded clamping plate, 37-Reinforced knob, 38-Limiting groove, 39-Cable, 40-Push cylinder, 41-Placement cylinder, 42-Strip opening, 43-Matching plate, 44-Mounting cylinder, 45-Exhaust fan, 46-First motor, 47-Exhaust hole, 48-Intake fan, 49-Second motor, 50-Filter plate, 50-Auxiliary protrusion. Detailed Implementation

[0030] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] like Figure 1-10As shown, this invention provides a new energy vehicle charging gun, including a charging gun housing 1, a charging head 2, a charging gun socket 3, and a cable 38 connected to the charging head 2. The upper end of the charging gun housing 1 is equipped with a snap-on switch that can engage with the corresponding new energy vehicle charging port, allowing selection based on the specific new energy vehicle being used. A charging gun rod 4 is fixedly connected to the front end of the charging gun housing 1, and a handle 5 is fixedly connected to the surface of the charging gun rod 4 for convenient use. A protective component is installed at the front end of the charging gun rod 4 to protect the cable 38. The connection between the cable 38 and the charging gun housing 1 is protected to prevent damage to the connection and detachment from the charging head 2. The rear end of the charging gun housing 1 is slidably connected to the charging head 2. The charging gun housing 1 has a cable 38 reserved inside to facilitate the movement of the charging head 2 and maintain the connection between the charging head 2 and the cable 38. A sandwich groove 11 is provided on the front side of the rear end of the charging gun housing 1. An annular cylinder 9 that can move back and forth is slidably connected inside the sandwich groove 11. When the charging head 2 moves forward, the annular cylinder 9 moves backward.

[0032] A tension spring 10 connects the charging head 2 to the inner wall of the charging gun housing 1. Correspondingly, thermally expanding metal clip structures for fixing annular cylinders 9 are installed on opposite sides inside the charging gun housing 1. When the annular cylinder 9 is fixed, the charging head 2 is also fixed under a linkage action, and the annular cylinder 9 can provide a braking effect on the charging head 2. When the charging head 2 is removed from the charging gun housing 1, the tension spring 10 is in a stretched state. A heat-conducting component is provided between the charging head 2 and the thermally expanding metal clip structure. When the thermally expanding metal clip structure expands due to heat, it releases the fixing effect with the annular cylinder 9. During use, when charging a new energy vehicle, if the device generates heat and the heat is high, it will... To avoid damage to the charging head 2 and the charging port of the new energy vehicle, when the heat is high, the charging head 2 will activate the power-off protection and automatically cut off the power. The heat is transferred to the thermal expansion metal buckle structure under the action of the heat-conducting component. The thermal expansion of the metal buckle structure due to heat will release the fixing effect on the annular cylinder 9. When the annular cylinder 9 resumes its movement, it will no longer have a braking effect on the charging head 2. Under the traction of the tension spring 10, the charging head 2 moves into the charging gun housing 1 and disengages from the charging port of the new energy vehicle, so that the charging head 2 is no longer connected to the new energy vehicle plug. When the charging head 2 moves into the charging gun housing 1, the annular cylinder 9 can be moved to the rear side under the linkage action.

[0033] A pusher cylinder 39 is fixedly connected to one end of the charging gun socket 3 corresponding to the charging head 2, which can push the annular cylinder 9 to reset. The user can insert this device into the charging gun socket 3 for heat dissipation. During the insertion process, the pusher cylinder 39 enters the interlayer groove 11 and pushes the annular cylinder 9 back to the front end of the interlayer groove 11. Under the action of linkage, it pushes the charging head 2 to move backward and remove it from the charging gun housing 1 for heat dissipation. After the heat is dissipated, the thermally expanded metal buckle cools down and resets, and re-fixes the annular cylinder 9, thereby re-braking the charging head 2 and fixing it, so as to facilitate reconnection to the charging port of the new energy vehicle for charging.

[0034] The protective component includes a threaded tube 29 fixedly connected to the front end of the charging gun rod 4. Multiple evenly distributed limiting blocks 30 are fixedly connected to the circumferential surface of the front end of the threaded tube 29. A control tube 32 is threadedly connected to the surface of the threaded tube 29. A sliding tube 31 is rotatably connected to the front end of the control tube 32. Multiple limiting grooves 37 are provided on the inner wall of the sliding tube 31, which are slidably connected to the limiting blocks 30. Multiple auxiliary protrusions 50 are evenly fixedly connected to the circumferential surface of the control tube 32 to facilitate the user's rotation of the control tube 32. When the control tube 32 is rotated, the threaded connection between the control tube 32 and the threaded tube 29 allows the control tube 32 to move axially on the surface of the threaded tube 29. Under the limiting of the limiting grooves 37 and the limiting blocks 30, the sliding tube 31 can move axially with the control tube 32 without rotating. Multiple evenly distributed... The spring plate 33 has a connecting plate 34 with a central opening fixedly connected to its front end. The connecting plate 34 is sleeved on the surface of the cable 38. The front end of the connecting plate 34 is connected to a clamping structure for clamping the cable 38. The clamping structure clamps the cable 38, thus fixing the connecting plate 34 and the cable 38. Then, by rotating the control tube 32, the sliding tube 31 is driven to move towards the charging gun rod 4, and the connecting plate 34 moves under the traction of the spring plate 33, thereby increasing the pressure between the cable 38 and the charging gun housing 1 and maintaining the connection between the cable 38 and the charging gun housing 1. During use, when the cable 38 is bent under force, the spring plate 33 can bend accordingly and support the cable 38, preventing the cable 38 from being damaged due to excessive bending, and preventing the cable 38 from being stretched during bending, which would affect the connection between the cable 38 and the charging head 2.

[0035] like Figure 8As shown, the clamping structure includes multiple threaded clamping plates 35 fixedly connected to the front end of the connecting plate 34. The front diameter of the threaded clamping plate 35 is smaller than the rear diameter. A reinforcing knob 36 is threadedly connected to the surface of the multiple threaded clamping plates 35. When the reinforcing knob 36 rotates, it moves towards the charging gun rod 4 under the action of the threaded connection with the threaded clamping plate 35. Since the rear diameter of the threaded clamping plate 35 is larger, it can squeeze the multiple threaded clamping plates 35 during the movement of the reinforcing knob 36. This creates a situation where the reinforcing knob 36 can push the multiple threaded clamping plates 35 to swing inward when it moves towards the connecting plate 34. The cable 38 is clamped by the threaded clamping plates 35 to achieve the effect of fixing the cable 38. Anti-slip pads are fixedly connected to the inner side of the threaded clamping plates 35 to improve the clamping and fixing effect.

[0036] Sub-plates 6 are fixedly connected to the corresponding two sides of the front end of the charging head 2. The sub-plates 6 are slidably connected to the inner wall of the charging gun housing 1. The sub-plates 6 are used to connect the charging head 2 to the charging gun housing 1 and improve the installation effect of the charging head 2. One end of the tension spring 10 is fixedly connected to the sub-plates 6, and the other end of the tension spring 10 is fixedly connected to the front end of the inside of the charging gun housing 1.

[0037] like Figure 2 , Figure 3 and Figure 4 As shown, a first control cylinder 7 is fixedly connected to the front end of the charging head 2, and a second control cylinder 8 is coaxially arranged at the front end of the first control cylinder 7. The second control cylinder 8 is sleeved on the surface of the first control cylinder 7, and the front end of the second control cylinder 8 is rotatably connected to the inner wall of the charging gun housing 1. An annular plate 16 is fixedly connected to the inner side of the annular cylinder 9 coaxially, and the annular plate 16 is sleeved on the surface of the second control cylinder 8.

[0038] The surfaces of the first control cylinder 7 and the second control cylinder 8 are respectively provided with a first spiral groove 12 and a second threaded groove. The inner wall of the second control cylinder 8 is fixedly connected to a first pin 13, which meshes with the first spiral groove 12. The inner wall of the annular plate 16 is fixedly connected to a second pin 15, which meshes with the second spiral groove 14. When the charging head 2 moves forward, it can drive the first control cylinder 7 to move synchronously. When the first control cylinder 7 moves, it can drive the second control cylinder 8 to rotate through the meshing of the first pin 13 and the first spiral groove 12. When the second control cylinder 8 rotates, it can drive the annular plate 16 to move backward through the meshing of the second pin 15 and the second threaded groove. Conversely, when the annular plate 16 moves forward, it can drive the charging head 2 to move backward under the linkage.

[0039] Connecting plates are fixedly connected to the corresponding two sides of the circumferential surface of the annular plate 16. The other end of the connecting plate is fixedly connected to the inner wall of the annular cylinder 9. The inner wall of the charging gun housing 1 is provided with movable openings at positions corresponding to the connecting plates. The connecting plates slide in the inner side of the movable openings to limit the movement of the annular cylinder 9, so that the annular cylinder 9 can only move back and forth inside the charging gun housing 1. This facilitates the second control cylinder 8 to drive the annular cylinder 9 to move back and forth when it rotates.

[0040] The thermal expansion metal buckle includes two corresponding movable plates 28. The upper sides of the inner wall of the interlayer groove 11 are respectively provided with mounting grooves 21 on the inner side. The bottom of the mounting grooves 21 is respectively provided with connecting slide grooves. The bottom of the movable plates 28 is respectively fixedly connected with connecting sliders 19. The connecting sliders 19 are respectively slidably connected with the connecting slide grooves. The inner end of the connecting sliders 19 is respectively fixedly connected with a return spring 20. The other end of the return spring 20 is respectively fixedly connected with the inner wall of the connecting slide groove. The return spring 20 provides the moving and returning power of the movable plates 28 through its own elasticity.

[0041] like Figure 5 and Figure 6 As shown, hooks 18 are fixedly connected to the upper end of the movable plate 28, and fixing grooves 17 are respectively opened on the surface of the annular cylinder 9 at positions corresponding to the hooks 18, with the hooks 18 engaging with the fixing grooves 17; support plates 26 are respectively provided at the outer end of the movable plate 28, and the support plates 26 are fixedly connected to the bottom of the mounting groove 21. A thermally expanding metal sheet 27 is fixedly connected to one end of the support plate 26 corresponding to the movable plate 28, and the upper end of the thermally expanding metal sheet 27 is connected to the heat-conducting component. The support plates 26 are used to support the thermally expanding metal sheet 27, so that the thermally expanding metal sheet... After being heated, 27 expands in the opposite direction to the support plate 26. When the charging head 2 heats up severely during charging, the heat-conducting component transfers heat to the thermal expansion metal sheet 27, causing the thermal expansion metal sheet 27 to expand after being heated. During the expansion of the thermal expansion metal sheet 27, it pushes the moving plate 28 and squeezes the reset spring 20 through the connecting slider 19. During the movement of the moving plate 28, the hook 18 gradually disengages from the fixing groove 17. When the hook 18 disengages from the fixing groove 17, it can no longer brake the annular cylinder 9, and the annular cylinder 9 can then move.

[0042] The heat-conducting component includes a first heat-conducting plate 22 and a second heat-conducting plate 23. The first heat-conducting plate 22 is fixedly connected to the charging gun housing 1, and the second heat-conducting plate 23 is fixedly connected to the thermal expansion metal sheet 27. The opposite ends of the first heat-conducting plate 22 and the second heat-conducting plate 23 are respectively fixedly connected to a first connector 25 and a second connector 24 that are in contact with each other. The connection between the first connector 25 and the second connector 24 is used for heat transfer. The thermal expansion metal sheet 27 is a high expansion alloy. Within a certain temperature range (20 to 100°C), specifically, it is a Cu60Zn40 alloy with a linear expansion coefficient of 19×10-6 / °C. When heated to the temperature range, it will expand rapidly and transfer heat through the first heat-conducting plate 22 and the second heat-conducting plate 23 to push the moving plate 28.

[0043] The charging gun socket 3 includes a mating plate 42 and a placement cylinder 40 fixedly connected to the rear end of the mating plate 42. The placement cylinder 40 is used to place the charging head 2. The pushing cylinder 39 is fixedly connected to the front end of the mating plate 42. After the charging head 2 is inserted, the pushing cylinder 39 pushes the annular cylinder to move. The upper side of the front end of the pushing cylinder 39 has a strip-shaped opening 41 on the rear side, which is used to cooperate with the snap-on switch and provide space for the snap-on switch. A receiving groove is formed between the pushing cylinder 39 and the mating plate 42, which can engage with the charging gun housing 1. After the charging head 2 is inserted into the charging gun socket 3, it engages with the charging gun housing 1 through the receiving groove to achieve stable placement of the charging gun.

[0044] Furthermore, in order to improve the heat dissipation effect of the charging head 2, the interior of the placement cylinder 40 is provided with an installation space adapted to the charging head 2, and the upper end of the placement cylinder 40 is provided with a plurality of exhaust holes 46. Heat dissipation components are installed inside the installation space. The heat dissipation components are used to dissipate heat from the charging head 2, so that the heat is dissipated through the exhaust holes 46, thereby improving the heat dissipation efficiency of the charging head 2.

[0045] Furthermore, the heat dissipation component includes an exhaust fan 44 rotatably connected to the upper side of the installation space. The exhaust fan 44 is located below a plurality of exhaust holes 46. A first motor 45 is provided at the upper end of the exhaust fan 44. The first motor 45 is fixedly connected to the inner wall of the installation space. The power output end of the first motor 45 is fixedly connected to the middle of the exhaust fan 44. When the first motor 45 rotates, it drives the exhaust fan 44 to rotate, drawing out the hot air in the installation space and discharging it through the exhaust holes 46, so as to facilitate the heat dissipation of the charging head 2.

[0046] Furthermore, to improve the heat dissipation of the charging head 2, the lower end of the placement cylinder 40 is fixedly connected to and connected to the mounting cylinder 43, which has openings at both the top and bottom. A filter plate 49 is fixedly connected to the bottom of the mounting cylinder 43. An air intake fan 47 is rotatably connected inside the mounting cylinder 43. A second motor 48 is located below the air intake fan 47. The second motor 48 is fixedly connected to the inner wall of the mounting cylinder 43. The power output end of the second motor 48 is fixedly connected to the middle of the air intake fan 47. The second motor 48 can rotate synchronously with the first motor 45. When the second motor 48 rotates, it can drive the air intake fan 47 to rotate, thus dissipating external heat. Air is drawn into the installation space and exhausted by the rotation of the exhaust fan 44. This airflow effectively removes heat from the charging head 2, allowing for rapid and effective heat dissipation and user convenience. Simultaneously, to facilitate the operation of the intake fan 47 and exhaust fan 44, a temperature sensor can be installed within the installation space. Both the first motor 45 and the second motor 48 are equipped with temperature controllers and AC contactors. The temperature sensor is electrically connected to the temperature controller and the AC contactor. The contacts of the AC contactor are electrically connected to the motors. The connections of these components are electrically... All circuits are existing technologies and can be purchased and used directly. Before use, a suitable temperature controller needs to be selected. These can be found in electromechanical shops or professional automation control markets. Temperature sensors usually output an electrical signal proportional to temperature. This signal can be received and processed by the temperature controller. AC contactors are used to control the start and stop of high-power motors. They can control the on and off of the motor circuit by controlling the opening and closing of their coils. The normally open or normally closed contacts of the contactor will control the power supply to the motor according to the output signal of the temperature controller, thereby realizing the start and stop control of the motor. When the temperature exceeds or falls below the preset threshold, the temperature controller will send a signal to drive the contactor to operate, thereby controlling the operation of the motor. When the temperature sensor detects that the charging head 2 in the installation space is hot, the temperature controller can drive the contactor to operate, controlling the first motor 45 and the second motor 48 to rotate, thereby driving the exhaust fan 44 and the intake fan 47 to rotate, forming an airflow to dissipate heat from the charging head 2. When the temperature sensor detects that the temperature of the charging head 2 has returned to normal, the temperature controller will control the contactor to work again, causing the first motor 45 and the second motor 48 to stop running.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them.

Claims

1. A charging gun for new energy vehicles, comprising a charging gun housing (1), a charging head (2), a charging gun socket (3), and a cable (38) connecting the charging head (2), characterized in that: The front end of the charging gun housing (1) is fixedly connected to the charging gun rod (4), and the front end of the charging gun rod (4) is equipped with a protective component to protect the cable (38). The rear end of the charging gun housing (1) is slidably connected to the charging head (2). A sandwich groove (11) is opened on the front side of the rear end of the charging gun housing (1). An annular cylinder (9) that can move back and forth is slidably connected inside the sandwich groove (11). When the charging head (2) moves to the front side, it forms a structure in which the annular cylinder (9) moves to the rear side. A tension spring (10) connects the charging head (2) to the inner wall of the charging gun housing (1). Correspondingly, thermal expansion metal clip structures for fixing annular cylinders (9) are installed on both sides inside the charging gun housing (1). When the annular cylinder (9) is fixed, the charging head (2) is also fixed under the action of linkage, and the annular cylinder (9) generates a braking effect on the charging head (2). When the charging head (2) moves out of the charging gun housing (1), the tension spring (10) is in a stretched state. A mutual... When the heat-conducting components in contact with the metal buckle structure expand due to heat, the fixing effect with the annular cylinder (9) is released. When the annular cylinder (9) resumes its movement, it will not produce a braking effect on the charging head (2). Under the traction of the tension spring (10), the charging head (2) moves into the charging gun housing (1) and disengages from the new energy vehicle charging port, so that the charging head (2) is no longer connected to the new energy vehicle port. When the charging head (2) moves into the charging gun housing (1), it drives the annular cylinder (9) to move to the rear under the linkage action. The charging gun socket (3) is fixedly connected to a pusher cylinder (39) that can push the annular cylinder (9) to reset at one end corresponding to the charging head (2).

2. The new energy vehicle charging gun as described in claim 1, characterized in that: The protective component includes a threaded tube (29) fixedly connected to the front end of the charging gun rod (4). Multiple evenly distributed limiting blocks (30) are fixedly connected to the circumferential surface of the front end of the threaded tube (29). A control tube (32) is threadedly connected to the surface of the threaded tube (29). A sliding tube (31) is rotatably connected to the front end of the control tube (32). Multiple limiting grooves (37) that slide and connect with the limiting blocks (30) are opened on the inner wall of the sliding tube (31). Multiple evenly distributed spring plates (33) are fixedly connected to the front end of the sliding tube (31). A connecting plate (34) with a central opening is fixedly connected to the front end of the spring plate (33). The connecting plate (34) is sleeved on the surface of the cable (38). A clamping structure for clamping the cable (38) is connected to the front end of the connecting plate (34).

3. A new energy vehicle charging gun as described in claim 2, characterized in that: The clamping structure includes multiple threaded clamping plates (35) fixedly connected to the front end of the connecting plate (34). The front diameter of the threaded clamping plate (35) is smaller than the rear diameter. A reinforcing knob (36) is threadedly connected to the surface of the multiple threaded clamping plates (35). When the reinforcing knob (36) moves toward the connecting plate (34), it can push the multiple threaded clamping plates (35) to swing inward.

4. A new energy vehicle charging gun as described in claim 3, characterized in that: The charging head (2) has a sub-plate (6) fixedly connected to the corresponding two sides of the front end. The sub-plate (6) is slidably connected to the inner wall of the charging gun housing (1). One end of the tension spring (10) is fixedly connected to the sub-plate (6), and the other end of the tension spring (10) is fixedly connected to the front end of the charging gun housing (1).

5. A new energy vehicle charging gun as described in claim 4, characterized in that: A first control cylinder (7) is fixedly connected to the front end of the charging head (2). A second control cylinder (8) is coaxially arranged at the front end of the first control cylinder (7). The second control cylinder (8) is sleeved on the surface of the first control cylinder (7). The front end of the second control cylinder (8) is rotatably connected to the inner wall of the charging gun housing (1). An annular plate (16) is fixedly connected coaxially to the inner side of the annular cylinder (9). The annular plate (16) is sleeved on the surface of the second control cylinder (8).

6. A new energy vehicle charging gun as described in claim 5, characterized in that: The surfaces of the first control cylinder (7) and the second control cylinder (8) are respectively provided with a first spiral groove (12) and a second threaded groove. The inner wall of the second control cylinder (8) is fixedly connected with a first pin (13), which meshes with the first spiral groove (12). The inner wall of the annular plate (16) is fixedly connected with a second pin (15), which meshes with the second spiral groove (14).

7. A new energy vehicle charging gun as described in claim 6, characterized in that: The two sides of the circumferential surface of the annular plate (16) are respectively fixedly connected to the connecting plates, and the other end of the connecting plates is respectively fixedly connected to the inner wall of the annular cylinder (9). The inner wall of the charging gun housing (1) is provided with movable openings at the positions corresponding to the connecting plates.

8. A new energy vehicle charging gun as described in claim 7, characterized in that: The thermal expansion metal buckle includes two corresponding movable plates (28). The upper sides of the inner wall of the interlayer groove (11) are respectively provided with mounting grooves (21) on both sides. The bottom of the mounting grooves (21) is respectively provided with connecting slide grooves. The bottom of the movable plates (28) is respectively fixedly connected with connecting sliders (19). The connecting sliders (19) are respectively slidably connected with the connecting slide grooves. The inner ends of the connecting sliders (19) are respectively fixedly connected with reset springs (20). The other ends of the reset springs (20) are respectively fixedly connected with the inner wall of the connecting slide grooves.

9. A new energy vehicle charging gun as described in claim 8, characterized in that: The upper end of the movable plate (28) is fixedly connected with hooks (18), and the surface of the annular cylinder (9) is provided with fixing grooves (17) at the positions corresponding to the hooks (18), and the hooks (18) engage with the fixing grooves (17); the outer end of the movable plate (28) is provided with a support plate (26), the support plate (26) is fixedly connected to the bottom of the mounting groove (21), and the support plate (26) is fixedly connected to a thermal expansion metal sheet (27) at the end corresponding to the movable plate (28), and the upper end of the thermal expansion metal sheet (27) is connected to the heat-conducting component.

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