New energy automobile charging gun

Abstract

The invention relates to the field of new energy automobile charging equipment, in particular to a new energy automobile charging gun, and provides a new energy automobile charging gun to solve the problems that a cable of a charging gun in the prior art is prone to damage, and the charging gun is still in a connected state after being powered off. A tension spring is connected between the charging head and the inner wall of the charging gun shell, thermal expansion metal buckle structures for fixing the annular cylinder are installed on the two corresponding sides in the charging gun shell correspondingly, and heat conduction parts making contact with each other are arranged between the charging head and the thermal expansion metal buckle structures. When the device is used, the heat of the charging head can be inducted in the process that the charging head charges the new energy automobile, and when the charging head abnormally heats, the charging head can be fixed to the annular cylinder, and the charging head can be used for charging the new energy automobile. And the charging head moves towards the interior of the charging gun shell under the traction of the tension spring and is separated from the new energy automobile charging port, so that the charging head is powered off and is not connected with the new energy automobile charging port any more.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle charging equipment, and in particular to a charging gun for new energy vehicles. Background Art

[0002] With the continuous improvement of consumers' awareness of environmental protection and energy conservation, as well as the continuous progress of new energy vehicle technology and the reduction of costs, the new energy vehicle market has shown explosive growth. Relying on its independently developed advanced technology and unique design, it has emerged in the market. At the same time, the export volume of new energy vehicles is also increasing continuously, becoming a new highlight of the Chinese automotive industry; as a bridge connecting the vehicle and the charging equipment, the development process of the new energy vehicle charging gun is closely linked to the rise of the new energy vehicle industry; existing charging guns are generally connected to the charging pile through cables to provide power supply. During the long-term frequent bending process, the connection between the cable and the charging gun is easily damaged. And because the power is relatively large when charging new energy vehicles, when charging frequently in hot weather, it is easy for the charging head of the charging gun to overheat. Although the existing charging gun will automatically cut off the power for protection when the temperature is too high, the electrode plates of the charging head and the charging port are still in a connected state, which is likely to damage the vehicle battery when the voltage is unstable. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a charging gun for new energy vehicles, effectively solving the problems mentioned in the above background art.

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

[0005] A charging gun for new energy vehicles 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 in the front-rear direction. A sandwich groove is opened from the rear end of the charging gun housing towards the front side. An annular cylinder capable of moving back and forth is slidably connected inside the sandwich groove. When the charging head moves forward, a structure is formed in which the annular cylinder moves backward;

[0006] A tension spring is connected between the charging head and the inner wall of the charging gun housing. Heat expansion metal snap structures for fixing the annular cylinder are respectively installed on two opposite sides inside the charging gun housing. When the charging head is moved out of the charging gun housing, the tension spring is in a stretched state. A heat conduction component in contact with each other is arranged between the charging head and the heat expansion metal snap structure. When the heat expansion metal snap structure expands due to heat, the fixing effect on the annular cylinder is released; A push cylinder capable of pushing the annular cylinder to reset is fixedly connected to one end of the charging gun socket corresponding to the charging head.

[0007] Further, the protective component includes a threaded tube fixedly connected to the front end of the charging gun rod. A plurality of uniformly 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. The front end of the control tube is rotatably connected to a sliding tube. A plurality of limiting grooves slidably connected to the limiting blocks are respectively formed in the inner wall of the sliding tube. A plurality of uniformly 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 sleeves on the cable surface, and a clamping structure for clamping the cable is connected to the front end of the connecting plate.

[0008] Further, the clamping structure includes a plurality of threaded clamping plates fixedly connected to the front end of the connecting plate. The front end diameter of the threaded clamping plate is smaller than the rear end diameter. A reinforcing knob is threadedly connected to the surfaces of the plurality of threaded clamping plates. When the reinforcing knob moves towards the connecting plate, it can push the plurality of threaded clamping plates to swing inwards.

[0009] Further, auxiliary plates are respectively fixedly connected to the two corresponding sides of the front end of the charging head. The auxiliary plates are slidably connected to the inner wall of the charging gun housing in the front and rear directions. One end of a tension spring is respectively fixedly connected to the auxiliary plate, and the other end of the tension spring is respectively fixedly connected to the front end inside 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 sleeves 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 sleeves on the surface of the second control cylinder;

[0011] A first spiral groove and a second threaded groove are respectively formed on the surfaces of the first control cylinder and the second control cylinder. A first pin shaft is fixedly connected to the inner wall of the second control cylinder. The first pin shaft meshes with the first spiral groove. A second pin shaft is fixedly connected to the inner wall of the annular plate. The second pin shaft meshes with the second spiral groove.

[0012] Further, linkage plates are respectively fixedly connected to the two corresponding sides of the circumferential surface of the annular plate. The other ends of the linkage plates are respectively fixedly connected to the inner wall of the annular cylinder. Moving openings are respectively formed in the inner wall of the charging gun housing at positions corresponding to the linkage plates.

[0013] Further, the thermal expansion metal buckle includes two correspondingly arranged moving plates. Installation grooves are respectively formed inwards on the upper sides of the inner walls of the sandwich grooves at the corresponding two sides. Connecting chutes are respectively formed at the bottoms of the installation grooves. Connecting sliders are respectively fixedly connected to the bottoms of the moving plates. The connecting sliders are respectively slidably connected to the connecting chutes. Inner ends of the connecting sliders are respectively fixedly connected to return springs. The other ends of the return springs are respectively fixedly connected to the inner walls of the connecting chutes;

[0014] Hook are fixedly connected to the upper ends of the moving plates respectively. Fixing grooves are respectively formed in the positions corresponding to the hooks on the surface of the annular cylinder, and the hooks are engaged with the fixing grooves. Support plates are respectively arranged at the outer ends of the moving plates. The support plates are fixedly connected to the bottom of the installation groove. One end of the support plate corresponding to the moving plate is fixedly connected with a heat-expandable metal sheet, and the upper end of the heat-expandable metal sheet is connected to the heat-conducting component.

[0015] The structure of the present invention is novel, ingeniously conceived, and simple and convenient to operate. Compared with the prior art, it has the following advantages:

[0016] 1. When in use, this device can sense the heat of the charger during the charging process of the charger for the new energy vehicle. When the charger abnormally generates heat and the temperature of the charger is too high, the charger moves into the charger gun housing under the traction of the tension spring and disengages from the charging port of the new energy vehicle, so that the charger is powered off and no longer connected to the new energy charging port, thereby avoiding continuous heating of the charger and damage to the charger and the charging port of the new energy vehicle.

[0017] 2. During the use of this device, when the cable is bent under force, the spring plate can bend accordingly and support the cable, avoiding damage to the cable due to excessive bending and preventing the cable from being stretched during the bending process, which may affect the connection between the cable and the charger.

[0018] 3. When in use, when the charger with too high temperature is inserted into the charger gun socket, in order to enable the charger to be used quickly, it can drive the intake fan to rotate, draw the outside air into the installation space, and discharge it under the rotation of the exhaust fan. During the air circulation process, the heat of the charger can be effectively taken away, enabling the charger to dissipate heat quickly and effectively, facilitating the user to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a new energy vehicle charger gun of the present invention.

[0020] Figure 2 It is a schematic cross-sectional view of the internal structure of the charger gun housing of a new energy vehicle charger gun of the present invention.

[0021] Figure 3 It is a schematic diagram of the tension spring connection structure of a new energy vehicle charger gun of the present invention.

[0022] Figure 4 It is an exploded schematic diagram of the installation structure of the first control cylinder and the second control cylinder of a new energy vehicle charger gun of the present invention.

[0023] Figure 5 It is a schematic diagram of the heat-expandable metal buckle structure of a new energy vehicle charger gun of the present invention.

[0024] Figure 6 Partial schematic view of the thermal expansion metal buckle structure of a charging gun for a new energy vehicle according to the present invention.

[0025] Figure 7 Cross-sectional schematic view of the charging gun housing structure of a charging gun for a new energy vehicle according to the present invention.

[0026] Figure 8 Schematic view of the installation structure of the protective component of a charging gun for a new energy vehicle according to the present invention.

[0027] Figure 9 Cross-sectional schematic view of the installation structure of the control tube of a charging gun for a new energy vehicle according to the present invention.

[0028] Figure 10 Schematic view of the heat dissipation component structure of a charging gun for a new energy vehicle according to the present invention.

[0029] Reference numerals in the figure: 1 - charging gun housing, 2 - charging head, 3 - charging gun socket, 4 - charging gun rod, 5 - handle, 6 - auxiliary plate, 7 - first control cylinder, 8 - second control cylinder, 9 - annular cylinder, 10 - tension spring, 11 - sandwich groove, 12 - first spiral groove, 13 - first pin shaft, 14 - second spiral groove, 15 - second pin shaft, 16 - annular plate, 17 - fixing groove, 18 - hook, 19 - connecting slider, 20 - return spring, 21 - installation groove, 22 - first heat conducting plate, 23 - second heat conducting plate, 24 - second connection head, 25 - first connection head, 26 - support plate, 27 - thermal expansion metal sheet, 28 - moving plate, 29 - threaded tube, 30 - limiting block, 31 - sliding tube, 32 - control tube, 33 - spring plate, 34 - connecting plate, 35 - threaded clamping plate, 36 - reinforcement knob, 37 - limiting groove, 38 - cable, 39 - pushing cylinder, 40 - placing cylinder, 41 - strip-shaped opening, 42 - mating plate, 43 - installation cylinder, 44 - exhaust fan, 45 - first motor, 46 - exhaust hole, 47 - intake fan, 48 - second motor, 49 - filter plate, 50 - auxiliary protrusion. Specific embodiments

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

[0031] As Figure 1-10As shown, the present invention provides a charging gun for a new energy vehicle, which includes a charging gun housing 1, a charging head 2, a charging gun socket 3, and a cable 38 connecting the charging head 2. A snap switch capable of being clamped to a corresponding charging port of a new energy vehicle is installed at the upper end of the charging gun housing 1, and can be selected according to the corresponding new energy vehicle during actual use; 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 of the device; a protective component for protecting the cable 38 is installed at the front end of the charging gun rod 4, which is used to protect the connection between the cable 38 and the charging gun housing 1 to prevent damage to the connection between the cable 38 and the charging gun housing 1 and the situation of disconnection from the charging head 2. The rear end of the charging gun housing 1 is slidably connected to the charging head 2 in the front-rear direction, and a cable 38 that can facilitate the movement of the charging head 2 is reserved inside the charging gun housing 1 to maintain the connection between the charging head 2 and the cable 38; a sandwich slot 11 is opened from the rear end of the charging gun housing 1 towards the front side, and a ring-shaped cylinder 9 capable of moving back and forth is slidably connected inside the sandwich slot 11. When the charging head 2 moves forward, a structure is formed in which the ring-shaped cylinder 9 moves backward.

[0032] A tension spring 10 is connected between the charging head 2 and the inner wall of the charging gun housing 1. Heat expansion metal snap structures for fixing the ring-shaped cylinder 9 are respectively installed on two corresponding sides inside the charging gun housing 1. When the ring-shaped cylinder 9 is fixed, the charging head 2 is also fixed under the linkage effect, and a braking effect can be generated on the charging head 2 through the ring-shaped cylinder 9; when the charging head 2 is removed from the charging gun housing 1, the tension spring 10 is in a stretched state, and a heat-conducting component in contact with each other is arranged between the charging head 2 and the heat expansion metal snap structure. When the heat expansion metal snap structure expands due to heat, the fixing effect on the ring-shaped cylinder 9 is released; when the device is in use, when charging a new energy vehicle and the heat generated is relatively high, in order to avoid damage to the charging head 2 and the charging port of the new energy vehicle, when the heat is relatively high, the charging head 2 activates the power-off protection and automatically cuts off the power. The heat is transferred to the heat expansion metal snap structure under the action of the heat-conducting component, and the heat metal snap structure expands due to heat, thereby releasing the fixing effect on the ring-shaped cylinder 9. When the ring-shaped cylinder 9 resumes the moving effect, it no longer generates a braking effect on the charging head 2. The charging head 2 moves towards the inside of the charging gun housing 1 under the traction of the tension spring 10 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 socket. When the charging head 2 moves towards the inside of the charging gun housing 1, the ring-shaped cylinder 9 can be driven to move backward under the linkage effect.

[0033] One end of the charging gun socket 3 corresponding to the charging head 2 is fixedly connected with a pushing cylinder 39 capable of pushing the annular cylinder 9 to reset. The user can insert the device into the charging gun socket 3 for heat dissipation. During the insertion process, the pushing cylinder 39 enters the sandwich groove 11 to push the annular cylinder 9, causing the annular cylinder 9 to return to the front end of the sandwich groove 11 and, under the linkage effect, pushing the charging head 2 to move backward and out of the charging gun housing 1 for heat dissipation. After the heat is dissipated, the thermally expandable metal buckle cools and resets, and fixes the annular cylinder 9 again, thereby braking the charging head 2 again to fix the charging head 2, facilitating reconnection with the new energy vehicle charging port to charge the new energy vehicle.

[0034] The protective component includes a threaded tube 29 fixedly connected to the front end of the charging gun rod 4. The circumferential surface of the front end of the threaded tube 29 is fixedly connected with a plurality of uniformly distributed limiting blocks 30. The surface of the threaded tube 29 is threadedly connected with a control tube 32. The front end of the control tube 32 is rotatably connected with a sliding tube 31. The inner wall of the sliding tube 31 is respectively provided with a plurality of limiting grooves 37 slidably connected with the limiting blocks 30. The circumferential surface of the control tube 32 is uniformly fixedly connected with a plurality of auxiliary protrusions 50 for facilitating the user to rotate the control tube 32. When the control tube 32 is rotated, due to the threaded connection between the control tube 32 and the threaded tube 29, the control tube 32 can axially move on the surface of the threaded tube 29, and under the limitation of the limiting grooves 37 and the limiting blocks 30, the sliding tube 31 can axially move along with the control tube 32 without rotating. The front ends of the sliding tube 31 are respectively fixedly connected with a plurality of uniformly distributed spring plates 33. The front end of the spring plate 33 is fixedly connected with a connecting plate 34 with a central opening. The connecting plate 34 is sleeved on the surface of the cable 38. The front end of the connecting plate 34 is connected with a clamping structure for clamping the cable 38. The connecting plate 34 is fixed to the cable 38 by clamping with the cable 38 through the clamping structure. Then, by rotating the control tube 32 to drive the sliding tube 31 to move towards the charging gun rod 4, and under the traction of the spring plates 33, the connecting plate 34 moves, thereby increasing the connection 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 plates 33 can bend along with it and support the cable 38, preventing the cable 38 from being excessively bent and damaged, and avoiding the cable 38 from being in a stretched state during the bending process, which affects the connection between the cable 38 and the charging head 2.

[0035] Such as Figure 8As shown, the clamping structure includes a plurality of threaded clamping plates 35 fixedly connected to the front end of the connecting plate 34. The front end diameter of the threaded clamping plate 35 is smaller than the rear end diameter. A reinforcing knob 36 is threadedly connected to the surfaces of the plurality of threaded clamping plates 35. When the reinforcing knob 36 rotates, it moves towards the charging gun rod 4 under the action of being threadedly connected to the threaded clamping plate 35. Since the rear end diameter of the threaded clamping plate 35 is larger, during the movement of the reinforcing knob 36, it can squeeze the plurality of threaded clamping plates 35, resulting in a situation where when the reinforcing knob 36 moves towards the connecting plate 34, it can push the plurality of threaded clamping plates 35 to swing inwards. The cable 38 is clamped by the threaded clamping plates 35 to achieve the fixing effect of the cable 38. Anti-slip pads are respectively fixedly connected to the inner sides of the threaded clamping plates 35 to improve the clamping and fixing effect.

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

[0037] As 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. 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 coaxially fixedly connected to the inner side of the annular cylinder 9. The annular plate 16 is sleeved on the surface of the second control cylinder 8;

[0038] First spiral grooves 12 and second threaded grooves are respectively formed on the surfaces of the first control cylinder 7 and the second control cylinder 8. A first pin shaft 13 is fixedly connected to the inner wall of the second control cylinder 8. The first pin shaft 13 engages with the first spiral groove 12. A second pin shaft 15 is fixedly connected to the inner wall of the annular plate 16. The second pin shaft 15 engages 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 engagement of the first pin shaft 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 engagement of the second pin shaft 15 and the second threaded groove. On the contrary, when the annular plate 16 moves forward, the charging head 2 can be driven to move backward under the linkage effect.

[0039] On both sides corresponding to the circumferential surface of the annular plate 16, linkage plates are respectively fixedly connected. The other ends of the linkage plates are respectively fixedly connected to the inner wall of the annular cylinder 9. At positions corresponding to the linkage plates on the inner wall of the charging gun housing 1, moving openings are respectively formed. The linkage plates are slidably fitted inside the moving openings to limit the annular cylinder 9, so that the annular cylinder 9 can only move back and forth inside the charging gun housing 1, thereby facilitating the annular cylinder 9 to move back and forth when the second control cylinder 8 rotates.

[0040] The thermal expansion metal buckle includes two correspondingly arranged moving plates 28. On the upper side of the inner wall of the sandwich groove 11, installation grooves 21 are respectively opened inward on both sides corresponding to each other. Connection chutes are respectively formed at the bottoms of the installation grooves 21. Connection sliders 19 are respectively fixedly connected to the bottoms of the moving plates 28. The connection sliders 19 are respectively slidably connected to the connection chutes. Inner ends of the connection sliders 19 are respectively fixedly connected to return springs 20. The other ends of the return springs 20 are respectively fixedly connected to the inner walls of the connection chutes. The return springs 20 provide power for the moving plates 28 to move and reset through their own elastic forces.

[0041] As Figure 5 and Figure 6 As shown, hooks 18 are respectively fixedly connected to the upper ends of the moving plates 28. Fixing grooves 17 are respectively formed at positions on the surface of the annular cylinder 9 corresponding to the hooks 18. The hooks 18 are engaged with the fixing grooves 17. Support plates 26 are respectively arranged at the outer ends of the moving plates 28. The support plates 26 are fixedly connected to the bottoms of the installation grooves 21. Heat expansion metal sheets 27 are fixedly connected to the ends of the support plates 26 corresponding to the moving plates 28. The upper ends of the heat expansion metal sheets 27 are connected to heat conduction components. The support plates 26 are used to support the heat expansion metal sheets 27, so that the heat expansion metal sheets 27 expand in the opposite direction of the support plates 26 after being heated. When the charging head 2 generates serious heat during the charging process, the heat conduction components transfer the heat to the heat expansion metal sheets 27, causing the heat expansion metal sheets 27 to expand after being heated. During the expansion process of the heat expansion metal sheets 27, the moving plates 28 are pushed and the return springs 20 are compressed through the connection sliders 19. During the movement of the moving plates 28, the hooks 18 gradually disengage from the fixing grooves 17. When the hooks 18 disengage from the fixing grooves 17, the annular cylinder 9 cannot be braked and the annular cylinder 9 can 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 respectively, and the second heat-conducting plate 23 is fixedly connected to the bimetallic strip 27 respectively. Corresponding one ends of the first heat-conducting plate 22 and the second heat-conducting plate 23 which face each other are fixedly connected with a first connector 25 and a second connector 24 which are in contact with each other. The connection of the first connector 25 and the second connector 24 is used for heat transfer. The bimetallic strip 27 is a high-expansion alloy, within a certain temperature range (20 - 100 °C), specifically a Cu60Zn40 alloy, with a linear expansion coefficient of 19×10-6 / °C. After it is heated to within 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 for placing the charging head 2. The push cylinder 39 is fixedly connected to the front end of the mating plate 42 and is used to push the annular cylinder to move after the charging head 2 is inserted. A strip-shaped opening 41 is formed in the upper side of the front end of the push cylinder 39 and extends backward, which is used to cooperate with the buckle switch to provide space for the buckle switch. An accommodation groove that can engage with the charging gun housing 1 is formed between the push cylinder 39 and the mating plate 42, which is used to engage with the charging gun housing 1 through the accommodation groove after the charging head 2 is inserted into the charging gun socket 3 to achieve stable placement of the charging gun.

[0044] Furthermore, in order to improve the heat dissipation effect of the charging head 2, an installation space adapted to the charging head 2 is formed inside the placement cylinder 40. A plurality of exhaust holes 46 are respectively formed in the upper end of the placement cylinder 40. A heat dissipation component is installed inside the installation space, and the heat dissipation component is used to dissipate heat from the charging head 2 so that the heat is dissipated through the exhaust holes 46 to improve 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 the plurality of exhaust holes 46. A first motor 45 is arranged 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, extracts the hot air in the installation space and discharges it through the exhaust holes 46, which is convenient for the charging head 2 to dissipate heat.

[0046] Further, in order to improve the heat dissipation effect of the charger 2, the lower end of the placement cylinder 40 is fixedly connected and communicated with an installation cylinder 43 with openings at both upper and lower ends. A filter plate 49 is fixedly connected to the bottom of the installation cylinder 43. An intake fan 47 is rotatably connected inside the installation cylinder 43. A second motor 48 is arranged below the intake fan 47. The second motor 48 is fixedly connected to the inner wall of the installation cylinder 43. The power output end of the second motor 48 is fixedly connected to the middle of the 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 intake fan 47 to rotate, draw external air into the installation space, and discharge it through the rotation of the exhaust fan 44. During the air circulation process, the heat of the charger 2 can be effectively carried away, enabling the charger 2 to dissipate heat quickly and effectively, facilitating the use of the user. At the same time, in order to facilitate the operation of the intake fan 47 and the exhaust fan 44, a temperature sensor can be installed in the installation space. Temperature controllers and AC contactors are installed inside both the first motor 45 and the second motor 48. The temperature sensor is electrically connected to the temperature controller, and the temperature sensor is electrically connected to the AC contactor. The contacts of the AC contactor are electrically connected to the motor. The connection circuits of the above components are all prior arts and can be directly purchased and used. Before use, a suitable temperature controller needs to be selected, which can be found in an electrical store or a professional automation control market. The temperature sensor usually outputs an electrical signal proportional to the temperature, which can be received and processed by the temperature controller. The AC contactor is used to control the start and stop of a motor with a relatively large power. It can control the on and off of the motor circuit by controlling the on and off of its coil. The normally open or normally closed contacts of the contactor will control the power supply of 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 is lower than the preset threshold, the temperature controller will send a signal to drive the contactor to act, and then control the operation of the motor. When the temperature sensor detects that the heat of the charger 2 in the installation space is relatively high, the temperature controller can drive the contactor to act, control the rotation of the first motor 45 and the second motor 48, and then drive the exhaust fan 44 and the intake fan 47 to rotate, forming an air flow to dissipate the heat of the charger 2. When the temperature sensor detects that the heat of the charger 2 returns to the normal value, the temperature controller controls the contactor to work again to stop the operation of the first motor 45 and the second motor 48.

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

Claims

1. A charging gun for a new energy vehicle, 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 a charging gun rod (4), the front end of the charging gun rod (4) is equipped with a protective component for protecting the cable (38), the rear end of the charging gun housing (1) is slidably connected to the charging head (2) in a front-to-back manner, the rear end of the charging gun housing (1) is provided with an interlayer groove (11) toward the front side, and an annular cylinder (9) that can move forward and backward is slidably connected inside the interlayer groove (11), so that when the charging head (2) moves toward the front side, the annular cylinder (9) moves toward the rear side.

2. A new energy vehicle charging gun as claimed in claim 1, characterized in that: A tension spring (10) is connected between the charging head (2) and the inner wall of the charging gun housing (1); heat-expandable metal buckle structures for fixing the annular cylinder (9) are respectively installed on two corresponding sides of the charging gun housing (1); when the charging head (2) is moved out of the charging gun housing (1), the tension spring (10) is in a stretched state; a heat-conducting component in contact with each other is provided between the charging head (2) and the heat-expandable metal buckle structure; when the heat-expandable metal buckle structure expands due to heat, the fixing effect with the annular cylinder (9) is released; and a push cylinder (39) capable of pushing the annular cylinder (9) to reset is fixedly connected to one end of the charging gun socket (3) corresponding to the charging head (2).

3. A new energy vehicle charging gun as claimed in claim 2, characterized in that: The protective component comprises a threaded tube (29) fixedly connected to the front end of the charging gun rod (4); a plurality of uniformly distributed limit 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); a plurality of limit grooves (37) slidably connected to the limit blocks (30) are respectively provided on the inner wall of the sliding tube (31); a plurality of uniformly distributed spring plates (33) are fixedly connected to the front end of the sliding tube (31); a connecting plate (34) with a hole in the middle 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); and a clamping structure for clamping the cable (38) is connected to the front end of the connecting plate (34).

4. A new energy vehicle charging gun as claimed in claim 3, characterized in that: The clamping structure comprises a plurality of threaded clamping plates (35) fixedly connected to the front end of the connecting plate (34); the front end diameter of the threaded clamping plates (35) is smaller than the rear end diameter; a reinforcing knob (36) is threadedly connected to the surface of the plurality of threaded clamping plates (35); when the reinforcing knob (36) moves toward the connecting plate (34), the plurality of threaded clamping plates (35) can be pushed to swing inward.

5. A new energy vehicle charging gun as claimed in claim 2, characterized in that: The two corresponding sides of the front end of the charging head (2) are respectively fixedly connected with a sub-plate (6), the sub-plate (6) is slidably connected to the inner wall of the charging gun housing (1) in a forward and backward manner, one end of the tension spring (10) is respectively fixedly connected to the sub-plate (6), and the other end of the tension spring (10) is respectively fixedly connected to the front end inside the charging gun housing (1).

6. A new energy vehicle charging gun as claimed in claim 5, 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 coaxially fixedly connected to the inner side of the annular cylinder (9); and the annular plate (16) is sleeved on the surface of the second control cylinder (8).

7. A new energy vehicle charging gun as claimed in claim 6, 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 spiral groove; the inner wall of the second control cylinder (8) is fixedly connected with a first pin shaft (13), the first pin shaft (13) is meshed with the first spiral groove (12); the inner wall of the annular plate (16) is fixedly connected with a second pin shaft (15), the second pin shaft (15) is meshed with the second spiral groove (14).

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

9. A new energy vehicle charging gun as claimed in claim 2, characterized in that: The heat expansion metal buckle comprises two correspondingly arranged movable plates (28), the corresponding two sides of the upper inner wall of the interlayer groove (11) are respectively provided with mounting grooves (21) towards the inside, the bottom of the mounting groove (21) is respectively provided with connecting slides, the bottom of the movable plate (28) is respectively fixedly connected with a connecting slider (19), the connecting slider (19) is respectively slidably connected to the connecting slide, the inner end of the connecting slider (19) is respectively fixedly connected with a return spring (20), and the other end of the return spring (20) is respectively fixedly connected to the inner wall of the connecting slide.

10. A new energy vehicle charging gun as claimed in claim 9, characterized in that: The upper ends of the movable plates (28) are respectively fixedly connected with hooks (18); the surfaces of the annular cylinder (9) are respectively provided with fixing grooves (17) at positions corresponding to the hooks (18); the hooks (18) are meshed with the fixing grooves (17); the outer ends of the movable plates (28) are respectively provided with support plates (26); the support plates (26) are fixedly connected with the bottom of the mounting grooves (21); the ends of the support plates (26) corresponding to the movable plates (28) are fixedly connected with heat expansion metal sheets (27); the upper ends of the heat expansion metal sheets (27) are connected with the heat conducting component.

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