Anti-creeping charging and discharging gun for electric vehicle

Abstract

The invention discloses an anti-creeping charging and discharging gun for an electric automobile. The anti-creeping charging and discharging gun comprises a gun base, a gun head arranged at the front end of the gun base and a leakage protector connected to the rear end of the gun base through a cable. The leakage protector is connected with a power strip; an anti-creeping device is arranged in the gun base; the gun head is at least provided with a live wire terminal and a zero wire terminal electrically connected with a cable. The anti-creeping device comprises a conductive rod, a conductive terminal, an insulating ring and a thermosensitive spring; the conducting rod is slidably arranged in the gun base; the front end of the conducting rod is slidably sleeved with the rear end of the live wire terminal; the front end of the conductive terminal is slidably sleeved with the rear end of the conductive rod; the rear end of the conductive terminal is electrically connected with the cable; the insulating ring is arranged at the front end part of the conducting rod and sleeves the rear end of the live wire terminal; the thermosensitive spring is arranged in the conducting rod; the two ends of the thermosensitive spring abut against the live wire terminal and the inner wall of the conducting rod respectively. The reliability and the use safety are higher, and the influence of faults of electronic components is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of discharge guns, and particularly to a leakage-proof charging and discharging gun for electric vehicles. Background Art

[0002] As an important peripheral device of new energy vehicles, the application scenarios of charging and discharging guns have expanded from basic outdoor power usage to diversified life and work scenarios. Currently, mainstream charging and discharging gun devices on the market generally adopt an active protection mechanism based on electronic components to achieve leakage protection and overheat protection functions. Specifically, a protection circuit is constructed through electronic components such as fuses, temperature sensors, and current detection chips.

[0003] However, since the charging and discharging gun relies on electronic components to achieve leakage prevention and overheat protection, once the electronic components fail, the protection function will fail, leading to the occurrence of usage risks. Therefore, there are still deficiencies in the use safety and reliability of existing charging and discharging guns. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned drawbacks and provide a leakage-proof charging and discharging gun for electric vehicles with higher reliability and use safety.

[0005] To achieve the above purpose, the specific solution of the present invention is as follows: A leakage-proof charging and discharging gun for electric vehicles includes a gun base, a gun head provided at the front end of the gun base, and a leakage protector connected to the rear end of the gun base through a cable; an anti-leakage device is provided inside the gun base; the leakage protector is connected to a socket; the gun head is provided with at least a live wire terminal and a neutral wire terminal electrically connected to the cable. The anti-leakage device includes a conductive rod, a conductive terminal, an insulating ring, and a thermal spring; the conductive rod is slidably provided inside the gun base; the front end of the conductive rod is slidably sleeved with the rear end of the live wire terminal; the front end of the conductive terminal is slidably sleeved with the rear end of the conductive rod; the rear end of the conductive terminal is electrically connected to the cable; the insulating ring is provided at the front end of the conductive rod and sleeved on the rear end of the live wire terminal; the thermal spring is provided inside the conductive rod; both ends of the thermal spring are respectively abutted against the live wire terminal and the inner wall of the conductive rod.

[0006] Optionally, the anti-leakage device further includes a fixed seat, a front terminal support seat, and a rear terminal support seat provided inside the gun base; the conductive rod slidably penetrates through the fixed seat; the front terminal support seat and the rear terminal support seat are respectively provided at the front and rear ends of the fixed seat; the front end of the conductive rod and the rear end of the live wire terminal respectively penetrate into the front terminal support seat and are sleeved with each other; the insulating ring is slidably provided inside the front terminal support seat; the front end of the conductive terminal and the rear end of the conductive rod respectively penetrate into the rear terminal support seat and are sleeved with each other.

[0007] Optionally, the anti-leakage device further includes an insulating heat-conducting rod provided inside the conductive rod; both ends of the insulating heat-conducting rod are respectively abutted against the rear end of the live wire terminal and the front end of the conductive terminal.

[0008] Optionally, the gun mount is provided with a heat dissipation window; the heat dissipation window is provided with a heat dissipation device; the heat dissipation device includes a rotating shaft rotatably arranged in the heat dissipation window and a cover ring fixed to the heat dissipation window; one end of the rotating shaft is provided with a rotating frame; the cover ring is rotatably provided with a first rotating ring in transmission connection with the rotating frame; a plurality of valve plates are movably arranged between one surface of the cover ring and the first rotating ring and are distributed circumferentially; when the rotating shaft drives the first rotating ring to rotate, the first rotating ring drives each valve plate to move so as to close or open the heat dissipation window; a torsion spring is connected between the outer peripheral wall of the first rotating ring and the gun mount; The other end of the rotating shaft protrudes with a friction frustum; the conductive rod is connected with an insulating friction plate; the insulating friction plate is in frictional contact with the friction frustum.

[0009] Optionally, the rotating shaft is provided with a shaft hole communicating with the heat dissipation window; a sponge is arranged at the end of the shaft hole; a pipeline ring is arranged on the outer peripheral wall of the rotating shaft; the pipeline ring communicates with the shaft hole; the pipeline ring is internally communicated with the conductive rod through a connecting pipe portion.

[0010] Optionally, the first rotating ring respectively protrudes with a driving pin corresponding to each valve plate; a first driving hole is formed in the surface of the valve plate facing the first rotating ring; the driving pin is movably embedded in the corresponding first driving hole; the cover ring respectively protrudes with a second driving hole corresponding to each valve plate; a driving boss is arranged on the surface of each valve plate facing away from the first rotating ring; the driving boss is movably embedded in the corresponding second driving hole.

[0011] Optionally, a second rotating ring is rotatably arranged on the other surface of the cover ring, and a color card ring is arranged on the surface of the second rotating ring; a color band layer with gradually deepening color is arranged on the surface of the color card ring; elastic ratchet teeth are arranged at intervals on the outer peripheral wall of the second rotating ring; the first rotating ring is provided with a ratchet tooth ring in one-way engagement with the elastic ratchet teeth; when the first rotating ring rotates, it drives the second rotating ring to rotate through the engagement transmission of the elastic ratchet teeth and the ratchet tooth ring; The gun mount is provided with an observation port at a position corresponding to the color band layer.

[0012] Optionally, a plurality of arc-shaped sliding grooves are recessed along the radial direction on the outer peripheral wall of the rotating frame; the plurality of arc-shaped sliding grooves are distributed circumferentially; a friction arc plate is slidably arranged in each arc-shaped sliding groove; expansion grooves are respectively recessed on the surface of the rotating frame facing away from the valve plate corresponding to each arc-shaped sliding groove; a guide shaft extending into the corresponding expansion groove is arranged on each friction arc plate; a return spring is sleeved on the guide shaft in the arc-shaped sliding groove; the return spring keeps the outer surface of the friction arc plate in frictional contact with the inner peripheral wall of the first rotating ring; an expansion block that expands after absorbing water is sleeved on the guide shaft in the expansion groove; An annular cavity is formed between the surface of the rotating frame facing away from the valve plate and the gun seat; the annular cavity is connected to each expansion groove; a capillary is also embedded in the gun seat; one end of the capillary is connected to the annular cavity, and the other end passes through the gun seat.

[0013] Optionally, a buckle is hinged inside the gun seat; the front end of the buckle passes through the gun head outward and is provided with a clamping head; the rear end of the buckle is provided with a button; and the button is movable to pass through the gun seat.

[0014] Optionally, a front end bracket and a rear end bracket are spaced apart and arranged side by side in the gun mount; a mounting plate is provided between the front end bracket and the rear end bracket; the live wire terminal and the neutral wire terminal are penetrated through the front end bracket; the anti-leakage device is provided on the mounting plate; the neutral wire terminal penetrates the rear end bracket and is electrically connected to the power cable.

[0015] The beneficial effects of the present invention are as follows: through the ingenious coordination of the thermistor spring, the conductive rod and the insulating ring, when the temperature is too high, the thermistor spring is heated and elongated to push the conductive rod to move, so that the conductive rod is out of contact with the live wire terminal while the insulating ring remains overlapped with the live wire terminal, accurately cutting off the live wire line and effectively avoiding leakage caused by overheating. Compared with traditional electronic component protection methods, the reliability and safety of use are higher and are not affected by electronic component failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 is a cross-sectional schematic diagram of another viewing angle of the present invention; Figure 5 It is a cross-sectional schematic diagram of the leakage prevention device of the present invention when the conductive rod is in contact with the live wire terminal; Figure 6 It is a cross-sectional schematic diagram of the leakage prevention device of the present invention when the conductive rod is out of contact with the live wire terminal; Figure 7 It is a schematic diagram of the structure of the heat dissipation device of the present invention when the heat dissipation window is closed; Figure 8 is a cross-sectional schematic diagram of the heat dissipation device of the present invention; Figure 9 It is a schematic structural diagram of the heat dissipation device of the present invention when the heat dissipation window is opened; Figure 10 It is a cross-sectional schematic diagram of the cooperation between the rotating shaft and the first rotating ring of the present invention; Figure 11 yes Figure 10 The enlarged schematic diagram of point B in the middle; Figure 12 is a schematic structural view of the rotating shaft of the present invention; Figure 13 is a schematic structural view of the cover ring of the present invention; Figure 14 is a schematic structural view of the valve plate of the present invention; Figure 15 is a schematic structural view of the cooperation of the friction arc plate, expansion block and return spring of the present invention; Description of reference numerals: 1, gun base; 11, heat dissipation window; 12, observation port; 13, front end bracket; 14, rear end bracket; 15, mounting plate; 2, gun head; 21, live wire terminal; 22, neutral wire terminal; 3, cable; 4, leakage protector; 5, socket strip; 6, anti-leakage device; 61, fixed seat; 62, front terminal support; 63, rear terminal support; 64, conductive rod; 65, conductive terminal; 66, insulating ring; 67, thermal spring; 68, insulating heat conducting rod; 69, insulating friction plate; 7, heat dissipation device; 71, rotating shaft; 711, rotating frame; 712, friction frustum; 713, shaft hole; 714, arc chute; 715, friction arc plate; 7151, guiding shaft; 716, expansion groove; 717, return spring; 718, expansion block; 72, cover ring; 721, second driving hole; 73, first rotating ring; 731, driving pin; 732, ratchet ring; 74, valve plate; 741, first driving hole; 742, driving boss; 75, winding spring; 76, sponge; 77, pipe ring; 771, connecting pipe part; 78, second rotating ring; 781, elastic ratchet pawl; 79, color card ring; 8, annular cavity; 81, capillary tube; 9, buckle; 91, clamping head; 92, button. Detailed implementation manners

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the implementation scope of the present invention is not limited thereto.

[0018] As Figures 1 to 15As shown in the figure, a leakage-proof charging and discharging gun for an electric vehicle according to this embodiment includes a gun base 1, a gun head 2 fixedly installed at the front end of the gun base 1, and a leakage protector 4 connected to the rear end of the gun base 1 through a cable 3; the leakage protector 4 is connected to a socket 5; an anti-leakage device 6 is provided in the gun base 1; the gun head 2 is provided with at least a live wire terminal 21 and a neutral wire terminal 22 electrically connected to the cable 3; the anti-leakage device 6 includes a conductive rod 64, a conductive terminal 65, an insulating ring 66 and a thermal spring 67; the conductive rod 64 is slidably arranged in the gun base 1; the front end of the conductive rod 64 is slidably sleeved with the rear end of the live wire terminal 21; the front end of the conductive terminal 65 is slidably sleeved with the rear end of the conductive rod 64; the rear end of the conductive terminal 65 is electrically connected to the cable 3; the insulating ring 66 is arranged at the front end of the conductive rod 64 and sleeved on the rear end of the live wire terminal 21; the thermal spring 67 is arranged in the conductive rod 64; both ends of the thermal spring 67 are respectively abutted against the live wire terminal 21 and the inner wall of the conductive rod 64. The thermal spring 67 can be made of a shape memory polymer, a thermally expandable polymer composite material, an alloy with a high expansion coefficient or a ceramic matrix composite material. In this embodiment, the gun head is also provided with a signal terminal and a ground wire terminal; the signal terminal is used for electrically connecting with the in-vehicle BMS module to detect whether the current connection circuit is for charging or discharging through the in-vehicle BMS module.

[0019] Specifically, when the charging and discharging gun is needed for use, insert the charging and discharging gun into the in-vehicle charging and discharging port. The leakage protector 4 plays a role of protecting power off to prevent leakage between the gun head 2 and the socket 5. Plug the electrical appliance plug into the socket 5 to use electricity, or plug the external power supply into the socket 5 to charge the in-vehicle battery pack; during normal use, the live wire terminal 21 and the conductive terminal 65 are respectively in good contact with the conductive rod 64, as Figure 5 shown, thereby connecting the live wire circuit and stably supplying power to the electrical appliance or stably charging the in-vehicle battery pack; at this time, the thermal spring 67 is in a natural state, and the insulating ring 66 does not affect the normal conduction of the charging and discharging circuit. When the charging and discharging gun works under high load for a long time or an abnormal situation occurs, resulting in an increase in the internal temperature of the charging and discharging gun, the thermal spring 67 starts to elongate when heated, and then pushes the conductive rod 64 to slide backward. During the movement of the conductive rod 64, the contact length between it and the live wire terminal 21 gradually decreases, and the contact length with the conductive terminal 65 correspondingly increases, always maintaining a stable conductive contact area, effectively avoiding an increase in contact resistance and additional heat generation caused by changes in the contact area; if the temperature further rises to the cut-off threshold, the thermal spring 67 pushes the conductive rod 64 to drive the insulating ring 66 to continue moving until the conductive rod 64 is separated from the live wire terminal 21, while the insulating ring 66 still touches the live wire terminal 21, as Figure 6 shown, thereby quickly cutting off the live wire circuit, preventing leakage accidents caused by overheating, and realizing efficient anti-leakage protection.

[0020] In this embodiment, through the ingenious cooperation of the thermal spring 67 with the conductive rod 64 and the insulating ring 66, when the temperature is too high, the thermal spring 67 expands due to heat and pushes the conductive rod 64 to move, causing the conductive rod 64 to disengage from the live wire terminal 21 while the insulating ring 66 still remains in contact with the live wire terminal 21, precisely cutting off the live wire circuit and effectively avoiding the leakage phenomenon caused by overheating. Compared with the traditional electronic component protection method, it has higher reliability and usage safety and is not affected by electronic component failures.

[0021] In addition, during the process of the thermal spring 67 driving the conductive rod 64 to move under high-temperature overload, before the live wire circuit is disconnected, the reduced contact length between the conductive rod 64 and the live wire terminal 21 will simultaneously increase the corresponding contact length with the conductive terminal 65; ensuring that during the transitional stage when the temperature rises and the device is about to activate the cut-off protection mechanism, a stable conductive contact area is always maintained, effectively avoiding the increase in contact resistance and additional heat generation caused by the change in contact area, and further ensuring the safe and stable operation of the charging and discharging gun under abnormal working conditions.

[0022] As Figures 4 to 6 shown, for the anti-leakage charging and discharging gun for electric vehicles in this embodiment, in some embodiments, the anti-leakage device 6 further includes a fixed seat 61, a front terminal support 62, and a rear terminal support 63 provided in the gun seat 1; the conductive rod 64 slides through the fixed seat 61; the front terminal support 62 and the rear terminal support 63 are respectively provided at the front end and the rear end of the fixed seat 61; the front end of the conductive rod 64 and the rear end of the live wire terminal 21 are respectively inserted into the front terminal support 62 and then sleeved with each other; the insulating ring 66 slides in the front terminal support 62; the front end of the conductive terminal 65 and the rear end of the conductive rod 64 are respectively inserted into the rear terminal support 63 and then sleeved with each other. By setting the fixed seat 61, the front terminal support 62, and the rear terminal support 63 in this embodiment, it is convenient for the installation of the conductive rod 64, provides guidance for the conductive rod 64, and is also beneficial for protecting the contact positions of the conductive rod 64 with the live wire terminal 21 and the conductive terminal 65.

[0023] As Figures 4 to 6 shown, for the anti-leakage charging and discharging gun for electric vehicles in this embodiment, in some embodiments, the anti-leakage device 6 further includes an insulating heat-conducting rod 68 provided in the conductive rod 64; both ends of the insulating heat-conducting rod 68 are respectively abutted against the rear end of the live wire terminal 21 and the front end of the conductive terminal 65. The insulating heat-conducting rod 68 can be made of ceramic, glass, mica, or boron nitride (BN) materials. By setting the insulating heat-conducting rod 68 in this embodiment, it is convenient to conduct heat to the surrounding of the thermal spring 67 through the insulating heat-conducting rod 68, so that the thermal spring 67 can timely sense the temperature rise change in the charging and discharging gun.

[0024] As Figures 2 to 4 、 Figures 7 to 10As shown, in the present embodiment, the leakage-proof charging and discharging gun for electric vehicles, in some embodiments, the gun seat 1 is provided with a heat dissipation window 11; the heat dissipation window 11 is provided with a heat dissipation device 7; the heat dissipation device 7 includes a rotating shaft 71 rotatably arranged in the heat dissipation window 11 and a cover ring 72 fixedly arranged in the heat dissipation window 11; a rotating frame 711 is provided at one end of the rotating shaft 71; the cover ring 72 is rotatably provided with a first rotating ring 73 which is transmission-connected with the rotating frame 711; a plurality of valve plates 74 distributed along the circumferential direction are movably provided between one surface of the cover ring 72 and the first rotating ring 73; when the rotating shaft 71 drives the first rotating ring 73 to rotate, the first rotating ring 73 drives each valve plate 74 to move to close or open the heat dissipation window 11; a coil spring 75 is connected between the outer peripheral wall of the first rotating ring 73 and the gun seat 1; a friction round table 712 is convexly provided at the other end of the rotating shaft 71; the conductive rod 64 is connected with an insulating friction plate 69; the insulating friction plate 69 is in friction contact with the friction round table 712.

[0025] Specifically, the insulating friction plate 69 is extended with a connecting rod; a strip hole is opened on the side wall of the fixing seat 61; the connecting rod passes through the strip hole and is fixedly connected to the conductive rod 64, so that the conductive rod 64 drives the insulating friction plate 69 to move synchronously through the connecting rod, and the strip hole provides an escape space for the connecting rod; in normal use, the coil spring 75 enables the first rotating ring 73 to drive each valve plate 74 to close the heat dissipation window 11, such as Figure 7 and Figure 8 As shown; when the temperature inside the charge and discharge gun rises, the thermal spring 67 pushes the conductive rod 64 to slide, and the conductive rod 64 drives the insulating friction plate 69 to slide. The insulating friction plate 69 cooperates with the friction round table 712 through friction, thereby synchronously driving the rotating shaft 71 to rotate, and the rotating shaft 71 drives the first rotating ring 73 to overcome the elastic force of the coil spring 75 to rotate, and the first rotating ring 73 drives each valve plate 74 to move, and the heat dissipation window 11 is opened, so that the heat in the charge and discharge gun can overflow from the heat dissipation window 11, as shown in FIG. Figure 9 As shown, the heat dissipation effect is achieved, the internal temperature of the charge and discharge gun is reduced, the intelligent heat dissipation adjustment is achieved, and the stable operation of the charge and discharge gun in a high temperature environment is ensured; if the temperature inside the charge and discharge gun is reduced after the heat dissipation effect of the heat dissipation window 11, the thermal spring 67 is restored and shortened, that is, the first rotating ring 73 is driven to rotate in the opposite direction to close the heat dissipation window 11, so as to prevent external impurities or rainwater from entering the charge and discharge gun and causing damage; if the temperature further rises to the cut-off threshold, the thermal spring 67 steel continues to push the conductive rod 64 to slide, so that the insulating ring 66 cuts off the live line, as shown in FIG. Figure 6 As shown, at the same time, the first rotating ring 73 drives each valve plate 74 to completely open the heat dissipation window 11, as shown in FIG. Figure 9 shown.

[0026] like Figure 2 , Figure 4 and Figure 8As shown, for the anti-electric leakage charging and discharging gun for electric vehicles in this embodiment, in some embodiments, the rotating shaft 71 is provided with a shaft hole 713 communicating with the heat dissipation window 11; a sponge 76 is provided at the end of the shaft hole 713; a pipe ring 77 is provided on the outer peripheral wall of the rotating shaft 71; the pipe ring 77 communicates with the shaft hole 713; the pipe ring 77 is internally communicated with the inside of the conductive rod 64 through a connecting pipe portion 771.

[0027] Specifically, the conductive rod 64 has a hollow structure, and a heat dissipation notch communicating with its interior is provided on the conductive rod 64; when the thermosensitive spring 67 pushes the conductive rod 64 to slide, the insulating friction plate 69 drives the rotating shaft 71 to rotate, and the rotating shaft 71 drives the first rotating ring 73 to rotate, so that each valve plate 74 opens the heat dissipation window 11. At this time, the hot air inside the conductive rod 64 enters the pipe ring 77 through the heat dissipation notch and the connecting pipe portion 771, then enters the shaft hole 713, and then floats out from the heat dissipation window 11 after passing through the sponge 76; thus, it is beneficial to reduce the temperature inside the conductive rod 64. When the hot air passes through the sponge 76, the moisture in the sponge 76 can also be evaporated to facilitate the recycling of the sponge 76. In this embodiment, by providing the sponge 76 in the shaft hole 713, when each valve plate 74 opens the heat dissipation window 11, the sponge 76 can be used to block foreign objects or water droplets from entering the inside of the conductive rod 64 through the shaft hole 713, enhancing the use safety of the structure.

[0028] As Figure 10 , Figure 13 and Figure 14 As shown, for the anti-electric leakage charging and discharging gun for electric vehicles in this embodiment, in some embodiments, the first rotating ring 73 is respectively convexly provided with a driving pin 731 corresponding to each valve plate 74; a first driving hole 741 is opened on the surface of the valve plate 74 facing the first rotating ring 73; the driving pin 731 is movably embedded in the corresponding first driving hole 741; the cover ring 72 is respectively convexly provided with a second driving hole 721 corresponding to each valve plate 74; a driving boss 742 is provided on the surface of each valve plate 74 facing away from the first rotating ring 73; the driving boss 742 is movably embedded in the corresponding second driving hole 721. In this embodiment, by providing the cooperation of the driving pin 731 and the first driving hole 741, and the cooperation of the driving boss 742 and the second driving hole 721, when the first rotating ring 73 rotates, through the cooperation of the driving pin 731 and the first driving hole 741, and the cooperation of the driving boss 742 and the second driving hole 721, the first rotating ring 73 simultaneously drives each valve plate 74 to move to close or open the heat dissipation window 11.

[0029] As Figures 2 to 4 , Figures 7 to 9As shown in the figure, in some embodiments of the anti-electric leakage charging and discharging gun for electric vehicles in this embodiment, on the other surface of the cover ring 72, a second rotating ring 78 is rotatably provided, and a color card ring 79 is provided on the surface of the second rotating ring 78; a color band layer with gradually deepening colors is provided on the surface of the color card ring 79; elastic pawls 781 are provided at intervals on the outer peripheral wall of the second rotating ring 78; the first rotating ring 73 is provided with a ratchet ring 732 that meshes unidirectionally with the elastic pawls 781; when the first rotating ring 73 rotates, it drives the second rotating ring 78 to rotate through the meshing transmission of the elastic pawls 781 and the ratchet ring 732; the gun base 1 is provided with an observation port 12 at a position corresponding to the color band layer.

[0030] Specifically, during normal use, the lighter color part of the color band layer corresponds to the position of the observation port 12, indicating that the charging and discharging gun has not experienced abnormal high-temperature overload. The user can directly understand the current normal working state of the device through the color presented by the observation port 12; when the thermal spring 67 pushes the conductive rod 64 to slide, the conductive rod 64 drives the rotating shaft 71 to rotate through the insulating friction plate 69, and the rotating shaft 71 drives the first rotating ring 73 to rotate. The first rotating ring 73 drives each valve plate 74 to open the heat dissipation window 11 for heat dissipation. At the same time, the first rotating ring 73 drives the second rotating ring 78 to rotate synchronously through the meshing transmission of the ratchet ring 732 and the elastic pawls 781, and the second rotating ring 78 drives the color card ring 79 to rotate, so as to change the color corresponding to the position of the observation port 12, thus recording the high-temperature situation inside the charging and discharging gun; when the coil spring 75 drives the first rotating ring 73 to rotate in the reverse direction, since the elastic pawls 781 and the ratchet ring 732 mesh unidirectionally, at this time, the first rotating ring 73 will not drive the second rotating ring 78 to rotate to ensure the recording effect of the color card ring 79; in this way, each time the valve plate 74 is opened, the first rotating ring 73 drives the second rotating ring 78 and the color card ring 79 to rotate a certain angle. As the number of occurrences of high-temperature overload increases, the color displayed by the observation port 12 gradually deepens. The user can directly understand the situation of the charging and discharging gun experiencing abnormal high-temperature overload, which is convenient for timely checking and maintaining the device, preventing potential failures in advance, and improving the use safety.

[0031] Such as Figure 3 、 Figures 10 to 12 、 Figure 15As shown in the figure, for the anti-electric leakage charging and discharging gun for electric vehicles in this embodiment, in some embodiments, a plurality of arc-shaped sliding grooves 714 are recessed along the radial direction on the outer peripheral wall of the rotating frame 711; the plurality of arc-shaped sliding grooves 714 are distributed circumferentially; a friction arc plate 715 is slidably arranged in each arc-shaped sliding groove 714; on the surface of the rotating frame 711 facing away from the valve plate 74, an expansion groove 716 is respectively recessed corresponding to each arc-shaped sliding groove 714; each friction arc plate 715 is provided with a guide shaft 7151 extending into the corresponding expansion groove 716; a return spring 717 is sleeved on the guide shaft 7151 in the arc-shaped sliding groove 714; the return spring 717 keeps the outer surface of the friction arc plate 715 in frictional contact with the inner peripheral wall of the first rotating ring 73; an expansion block 718 that expands after absorbing water is sleeved on the guide shaft 7151 in the expansion groove 716; the expansion block 718 can be made of high molecular water-absorbing resin, bentonite or hydrogel material; an annular cavity 8 is formed between the surface of the rotating frame 711 facing away from the valve plate 74 and the gun base 1; the annular cavity 8 is communicated with each expansion groove 716; a capillary tube 81 is also embedded in the gun base 1; one end of the capillary tube 81 is communicated with the annular cavity 8, and the other end penetrates out of the gun base 1 outward.

[0032] Specifically, initially, the return spring 717 exerts an elastic force on the friction arc plate 715, so that the friction arc plate 715 protrudes from the arc-shaped sliding groove 714 and remains in frictional contact with the inner peripheral wall of the first rotating ring 73. Thus, when the rotating shaft 71 rotates, the rotating shaft 71 drives the first rotating ring 73 to rotate synchronously through the frictional force between each friction arc plate 715 and the first rotating ring 73, so as to close or open the heat dissipation window 11 by each valve plate 74; and in rainy days, rainwater flows into the annular cavity 8 through the capillary tube 81. Since the annular cavity 8 is communicated with the expansion groove 716, the expansion block 718 in the expansion groove 716 can come into contact with water and expand. During the expansion process of the expansion block 718, an inward acting force is generated on the friction arc plate 715 through the guide shaft 7151, so that the friction arc plate 715 can overcome the elastic force of the return spring 717 and retract inward into the arc-shaped sliding groove 714, thus disengaging from the inner peripheral wall of the first rotating ring 73, that is, the transmission between the first rotating ring 73 and the rotating shaft 71 is disconnected. At this time, the first rotating ring 73 can rotate reversely under the condition that the energy stored in the coil spring 75 is released, so as to drive each valve plate 74 to close the heat dissipation window 11. In this way, it effectively prevents rainwater from entering the inside of the charging and discharging gun through the heat dissipation window 11, protects the internal circuit and components from being eroded by rainwater, and improves the use safety and reliability of the charging and discharging gun in harsh weather environments.

[0033] After the rain stops, as the water in the expansion block 718 gradually evaporates, the expansion block 718 returns to its original state, and the friction arc plate 715 extends outward again under the elastic force of the return spring 717, and comes into frictional contact with the first rotating ring 73 again, restoring the transmission connection state between the first rotating ring 73 and the rotating shaft 71.

[0034] In this embodiment, through the cooperative action of the expansion block 718, the return spring 717, the friction arc plate 715, and the capillary tube 81, a flexible transmission between anti-electric leakage and heat dissipation is achieved, realizing the function of automatically closing the heat dissipation window 11 in rainy weather, effectively preventing rainwater from entering the inside of the charging and discharging gun, protecting the internal circuit and components from rain erosion, and improving the use safety and reliability of the charging and discharging gun in harsh weather environments.

[0035] As Figure 2 shown, in some embodiments of the anti-electric leakage type charging and discharging gun for electric vehicles in this embodiment, a buckle 9 is hinged inside the gun base 1; a chuck 91 is provided at the front end of the buckle 9 and penetrates outward through the gun head 2; a button 92 is provided at the rear end of the buckle 9; the button 92 movably penetrates out of the gun base 1. Specifically, when using the charging and discharging gun, first press the button 92 and then insert the charging and discharging gun into the vehicle-mounted charging and discharging port, and then release the button 92. At this time, the chuck 91 will be clamped at the vehicle-mounted charging and discharging port, preventing the charging and discharging gun from falling off, and further improving the structural use reliability.

[0036] As Figure 2 shown, in some embodiments of the anti-electric leakage type charging and discharging gun for electric vehicles in this embodiment, a front support 13 and a rear support 14 are arranged side by side at intervals inside the gun base 1; a mounting plate 15 is arranged between the front support 13 and the rear support 14; the live wire terminal 21 and the neutral wire terminal 22 penetrate through the front support 13; the anti-electric leakage device 6 is arranged on the mounting plate 15; the neutral wire terminal 22 penetrates through the rear support 14 and is electrically connected to the cable 3. By setting the front support 13, the rear support 14, and the mounting plate 15 in this embodiment, it is convenient for the installation of the live wire terminal 21, the neutral wire terminal 22, and the anti-electric leakage device 6, making the structure more stable.

[0037] The above are only the preferred embodiments of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of this invention patent application are included in the protection scope of this invention patent application.

Claims

1. A leakage-proof charging and discharging gun for electric vehicles, characterized in that, It includes a gun base, a gun head arranged at the front end of the gun base, and a leakage protector connected to the rear end of the gun base through a cable; the leakage protector is connected to a socket strip; a leakage prevention device is arranged in the gun base; the gun head is provided with at least a live wire terminal and a neutral wire terminal electrically connected to the cable; The anti-leakage device includes a conductive rod, a conductive terminal, an insulating ring and a thermal spring; the conductive rod is slidably arranged in the gun seat; the front end of the conductive rod is slidably sleeved with the rear end of the live wire terminal; the front end of the conductive terminal is slidably sleeved with the rear end of the conductive rod; the rear end of the conductive terminal is electrically connected to the cable; the insulating ring is arranged at the front end of the conductive rod and sleeved on the rear end of the live wire terminal; the thermal spring is arranged in the conductive rod; the two ends of the thermal spring are respectively abutted against the inner walls of the live wire terminal and the conductive rod.

2. The anti-electric leakage charging and discharging gun for electric vehicles according to claim 1, characterized in that, The anti-leakage device also includes a fixing seat, a front terminal support and a rear terminal support arranged in the gun seat; the conductive rod slides through the fixing seat; the front terminal support and the rear terminal support are respectively arranged at the front end and the rear end of the fixing seat; the front end of the conductive rod and the rear end of the live wire terminal are respectively inserted into the front terminal support and then sleeved together; the insulating ring is slidably arranged in the front terminal support; the front end of the conductive terminal and the rear end of the conductive rod are respectively inserted into the rear terminal support and then sleeved together.

3. The anti-electric leakage charging and discharging gun for electric vehicles according to claim 1, characterized in that, The anti-leakage device also includes an insulating heat-conducting rod arranged in the conductive rod; two ends of the insulating heat-conducting rod are respectively abutted against the rear end of the live wire terminal and the front end of the conductive terminal.

4. The anti-electric leakage charging and discharging gun for electric vehicles according to claim 1, characterized in that, The gun seat is provided with a heat dissipation window; the heat dissipation window is provided with a heat dissipation device; the heat dissipation device includes a rotating shaft rotatably arranged in the heat dissipation window and a cover ring fixedly arranged on the heat dissipation window; a rotating frame is provided at one end of the rotating shaft; a first rotating ring which is rotatably connected to the rotating frame is provided on the cover ring; a plurality of valve plates distributed along the circumferential direction are movably provided between a surface of the cover ring and the first rotating ring; when the rotating shaft drives the first rotating ring to rotate, the first rotating ring drives each valve plate to move so as to close or open the heat dissipation window; a coil spring is connected between the outer peripheral wall of the first rotating ring and the gun seat; A friction cone is protruding from the other end of the rotating shaft; an insulating friction plate is connected to the conductive rod; and the insulating friction plate is in friction contact with the friction cone.

5. The anti-electric leakage charging and discharging gun for electric vehicles according to claim 4, wherein The rotating shaft is provided with an axial hole connected with the heat dissipation window; a sponge is provided at the end of the axial hole; a pipeline ring is provided on the outer peripheral wall of the rotating shaft; the pipeline ring is connected with the axial hole; the pipeline ring is connected with the inside of the conductive rod through a connecting pipe.

6. The anti-electric leakage charging and discharging gun for electric vehicles according to claim 4, characterized in that A driving pin is protrudingly provided on the first rotating ring corresponding to each valve plate; a first driving hole is provided on the surface of the valve plate facing the first rotating ring; the driving pin is movably embedded in the corresponding first driving hole; a second driving hole is protrudingly provided on the cover ring corresponding to each valve plate; a driving boss is provided on the surface of each valve plate facing away from the first rotating ring; the driving boss is movably embedded in the corresponding second driving hole.

7. An anti-electric leakage charging and discharging gun for an electric vehicle according to claim 4, characterized in that A second rotating ring is rotatably arranged on the other surface of the cover ring, and a color card ring is arranged on the surface of the second rotating ring; a circle of color band layer with gradually deepening color is arranged on the surface of the color card ring; elastic ratchets are arranged at intervals on the outer peripheral wall of the second rotating ring; the first rotating ring is provided with a ratchet ring that is unidirectionally meshed with the elastic ratchets; when the first rotating ring rotates, the second rotating ring is driven to rotate through the meshing transmission of the elastic ratchets and the ratchet ring; The gun base is provided with an observation port at a position corresponding to the ribbon layer.

8. The anti-electric leakage charging and discharging gun for an electric vehicle according to claim 4, characterized in that, A plurality of arc-shaped sliding grooves are recessed in the outer peripheral wall of the rotating frame along the radial direction; the plurality of arc-shaped sliding grooves are distributed circumferentially; a friction arc plate is slidably arranged in each arc-shaped sliding groove; an expansion groove is recessed in the surface of the rotating frame facing away from the valve plate corresponding to each arc-shaped sliding groove; each friction arc plate is provided with a guide shaft extending into the corresponding expansion groove; a return spring is sleeved on the guide shaft in the arc-shaped sliding groove; the return spring keeps the outer surface of the friction arc plate in frictional contact with the inner peripheral wall of the first rotating ring; an expansion block that expands after absorbing water is sleeved on the guide shaft in the expansion groove; An annular cavity is formed between the surface of the rotating frame facing away from the valve plate and the gun base; the annular cavity is communicated with each expansion groove; a capillary tube is also embedded in the gun base; one end of the capillary tube is communicated with the annular cavity, and the other end penetrates out of the gun base outward.

9. The anti-electric leakage charging and discharging gun for an electric vehicle according to claim 1, characterized in that, A buckle is hinged in the gun base; the front end of the buckle penetrates through the gun head outward and is provided with a clamping head; a button is arranged at the rear end of the buckle; the button movably penetrates out of the gun base.

10. The anti-electric leakage charging and discharging gun for an electric vehicle according to claim 1, characterized in that, A front support and a rear support are arranged in the gun base at intervals side by side; a mounting plate is arranged between the front support and the rear support; the live wire terminal and the neutral wire terminal penetrate through the front support; the anti-electric leakage device is arranged on the mounting plate; the neutral wire terminal penetrates through the rear support and is electrically connected to the cable.

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