An electric vehicle leakage-proof charging and discharging gun

Abstract

The application discloses an electric leakage prevention type charging and discharging gun for electric vehicles, which comprises a gun seat, a gun head arranged at the front end of the gun seat, and an electric leakage protector connected to the rear end of the gun seat through a cable; the electric leakage protector is connected with a power strip; an electric leakage prevention device is arranged in the gun seat; the gun head is provided with at least a live wire terminal and a zero line terminal electrically connected with the cable; the electric leakage prevention device comprises a conductive rod, a conductive terminal, an insulating ring and a thermal spring; the conductive rod is slidingly arranged in the gun seat; the front end of the conductive rod is slidingly sleeved with the rear end of the live wire terminal; the front end of the conductive terminal is slidingly 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 of the conductive rod and sleeved with 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 in abutment with the live wire terminal and the inner wall of the conductive rod; the reliability and use safety are higher, and the electric leakage prevention type charging and discharging gun is not affected by the failure of electronic elements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of discharge gun, in particular to a leakage protection type charging and discharging gun for electric vehicles. BACKGROUND

[0002] As an important peripheral device of new energy vehicles, the application scene of the charging and discharging gun has been expanded from basic outdoor power supply to diversified life and work scenes. The mainstream charging and discharging gun devices on the current market generally adopt an active protection mechanism based on electronic components to realize leakage protection and overheat protection functions, which specifically means that a protection circuit is constructed by fuses, temperature sensors, current detection chips and other electronic components.

[0003] However, since the charging and discharging gun relies on electronic components to realize leakage protection and overheat protection, once the electronic components fail, the protection function will be invalid, resulting in use risks. Therefore, the existing charging and discharging gun still has deficiencies in use safety and reliability. SUMMARY

[0004] The present application aims to overcome the above-mentioned shortcomings and provide a leakage protection type charging and discharging gun for electric vehicles, which has higher reliability and use safety.

[0005] To achieve the above-mentioned purpose, the specific scheme of the present application is as follows: a leakage protection type charging and discharging gun for electric vehicles, comprising a gun seat, a gun head arranged at the front end of the gun seat, and a leakage protector connected at the rear end of the gun seat through a cable; a leakage protection device is arranged in the gun seat; the leakage protector is connected with a power strip; the gun head is provided with at least a live terminal and a zero line terminal electrically connected with the cable;

[0006] The leakage protection device comprises a conductive rod, a conductive terminal, an insulating ring and a thermal spring; the conductive rod is slidingly arranged in the gun seat; the front end of the conductive rod is slidingly sleeved with the rear end of the live terminal; the front end of the conductive terminal is slidingly 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 of the conductive rod and sleeved on the rear end of the live terminal; the thermal spring is arranged in the conductive rod; the two ends of the thermal spring are respectively in abutment with the live terminal and the inner wall of the conductive rod.

[0007] Optionally, the leakage protection device further comprises a fixing seat, a front terminal support and a rear terminal support arranged in the gun seat; the conductive rod slidingly penetrates 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 terminal are respectively inserted into the front terminal support and then mutually sleeved; the insulating ring is slidingly 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 mutually sleeved.

[0008] Optionally, the leakage prevention device further comprises an insulating heat-conducting rod arranged in the conductive rod; two ends of the insulating heat-conducting rod are respectively in abutment with the rear end of the live terminal and the front end of the conductive terminal.

[0009] Optionally, 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 comprises a rotating shaft rotatably arranged in the heat dissipation window and a cover ring fixedly arranged on 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 pieces distributed in the circumferential direction are movably arranged between one 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 piece to move to close or open the heat dissipation window; a coil spring is connected between the outer circumferential wall of the first rotating ring and the gun seat.

[0010] The other end of the rotating shaft is provided with a friction circular platform; the conductive rod is connected with an insulating friction plate; the insulating friction plate is in frictional contact with the friction circular platform.

[0011] Optionally, the rotating shaft is provided with a shaft hole in communication with the heat dissipation window; the end of the shaft hole is provided with a sponge; the outer circumferential wall of the rotating shaft is provided with a pipeline ring; the pipeline ring is in communication with the shaft hole; the pipeline ring is in communication with the inside of the conductive rod through a connecting pipe portion.

[0012] Optionally, the first rotating ring is provided with a driving pin corresponding to each valve piece; the surface of the valve piece facing the first rotating ring is provided with a first driving hole; the driving pin is movably embedded in the corresponding first driving hole; the cover ring is provided with a second driving hole corresponding to each valve piece; the surface of each valve piece away from the first rotating ring is provided with a driving boss; the driving boss is movably embedded in the corresponding second driving hole.

[0013] Optionally, the other surface of the cover ring is rotatably provided with a second rotating ring; the surface of the second rotating ring is provided with a color card ring; the surface of the color card ring is provided with a color band layer with gradually deepening color; the outer circumferential wall of the second rotating ring is provided with elastic pawls at intervals; the first rotating ring is provided with a ratchet ring in one-way engagement with the elastic pawls; when the first rotating ring rotates, the second rotating ring is driven to rotate through the engagement transmission of the elastic pawls and the ratchet ring.

[0014] The gun seat is provided with an observation port at a position corresponding to the color band layer.

[0015] Optionally, the outer peripheral wall of the rotating frame is radially recessed with a plurality of circular arc sliding grooves; the plurality of circular arc sliding grooves are distributed in the circumferential direction; each of the circular arc sliding grooves is slidably provided with a friction arc plate; the surface of the rotating frame opposite to the valve plate is respectively recessed with an expansion groove corresponding to each circular arc sliding groove; each of the friction arc plates is provided with a guide shaft extending into the corresponding expansion groove; the guide shaft is sleeved with a return spring in the circular arc 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; the guide shaft is sleeved with an expansion block that expands after absorbing water in the expansion groove;

[0016] The surface of the rotating frame opposite to the valve plate and the gun seat form an annular cavity; the annular cavity is in communication with each expansion groove; the gun seat is further embedded with a capillary tube; one end of the capillary tube is in communication with the annular cavity, and the other end penetrates out of the gun seat.

[0017] Optionally, the gun seat is hingedly provided with a buckle; the front end of the buckle penetrates out of the gun head and is provided with a clamping head; the rear end of the buckle is provided with a button; the button is movably penetrated out of the gun seat.

[0018] Optionally, the front end support and the rear end support are spaced and arranged side by side in the gun seat; the mounting plate is arranged between the front end support and the rear end support; the live terminal and the zero terminal are penetrated and arranged in the front end support; the anti-creeping device is arranged on the mounting plate; the zero terminal is electrically connected with the cable after penetrating through the rear end support.

[0019] The beneficial effects of the present application are: through the ingenious cooperation of the heat-sensitive spring, the conductive rod and the insulating ring, when the temperature is too high, the heat-sensitive spring is heated and elongated to push the conductive rod to move, so that the conductive rod is separated from the live terminal and the insulating ring still remains lapped on the live terminal, the live line is accurately cut off, the leakage phenomenon caused by overheating is effectively avoided, compared with the traditional electronic component protection method, the reliability and use safety are higher, and the influence of electronic component failure is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the present application;

[0021] Figure 2 is a cross-sectional schematic diagram of the present application;

[0022] Figure 3 is Figure 2 is an enlarged schematic diagram of A in FIG. 1;

[0023] Figure 4 is a cross-sectional schematic diagram of another view of the present application;

[0024] Figure 5 is a cross-sectional schematic diagram of the anti-creeping device of the present application when the conductive rod and the live terminal are in contact;

[0025] Figure 6 This is a cross-sectional schematic diagram of the leakage protection device of the present invention when the conductive rod is out of contact with the live wire terminal;

[0026] Figure 7 This is a schematic diagram of the heat dissipation device of the present invention when the heat dissipation window is closed;

[0027] Figure 8 This is a cross-sectional schematic diagram of the heat dissipation device of the present invention;

[0028] Figure 9 This is a schematic diagram of the heat dissipation device of the present invention when the heat dissipation window is opened;

[0029] Figure 10 This is a cross-sectional schematic diagram of the cooperation between the rotating shaft and the first rotating ring of the present invention;

[0030] Figure 11 yes Figure 10 Enlarged view of point B in the middle;

[0031] Figure 12 This is a schematic diagram of the structure of the rotating shaft of the present invention;

[0032] Figure 13 This is a schematic diagram of the structure of the cover ring of the present invention;

[0033] Figure 14 This is a schematic diagram of the valve plate of the present invention;

[0034] Figure 15 This is a schematic diagram of the structure of the friction arc plate, expansion block, and reset spring of the present invention.

[0035] Explanation of reference numerals in the attached drawings: 1. Gun base; 11. Heat dissipation window; 12. Observation port; 13. Front support; 14. Rear support; 15. Mounting plate; 2. Gun head; 21. Live wire terminal; 22. Neutral wire terminal; 3. Cable; 4. Residual current device (RCD); 5. Power strip; 6. Leakage protection device; 61. Fixing base; 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; 71 3. Shaft hole; 714. Arc groove; 715. Friction arc plate; 7151. Guide shaft; 716. Expansion groove; 717. Return spring; 718. Expansion block; 72. Cover ring; 721. Second drive hole; 73. First rotating ring; 731. Drive pin; 732. Ratchet ring; 74. Valve plate; 741. First drive hole; 742. Drive boss; 75. Coil spring; 76. Sponge; 77. Pipe ring; 771. Connecting pipe section; 78. Second rotating ring; 781. Elastic pawl; 79. Color card ring; 8. Annular cavity; 81. Capillary tube; 9. Buckle; 91. Clip; 92. Button. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the invention to this.

[0037] like Figures 1 to 15 As shown in this embodiment, a leakage-proof charging and discharging gun for electric vehicles includes a gun base 1, a gun head 2 fixedly installed on the front end of the gun base 1, and a leakage current protector 4 connected to the rear end of the gun base 1 via a cable 3; the leakage current protector 4 is connected to a power strip 5; a leakage-proof device 6 is provided inside 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 leakage-proof 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 disposed inside 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 disposed 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 disposed inside the conductive rod 64; the two ends of the thermal spring 67 abut against the inner walls of the live wire terminal 21 and the conductive rod 64, respectively. The thermal spring 67 can be made of shape memory polymer, thermally expanding polymer composite material, high expansion coefficient alloy, or ceramic matrix composite material. In this embodiment, the gun head is also provided with a signal terminal and a ground terminal; the signal terminal is used to electrically connect to the vehicle-mounted BMS module to detect whether the current connection circuit is charging or discharging through the vehicle-mounted BMS module.

[0038] Specifically, when the charging / discharging gun is needed, it is plugged into the vehicle's charging / discharging port. The leakage current protector 4, located between the gun head 2 and the power strip 5, prevents leakage and cuts off power. The appliance plug can be plugged into the power strip 5 to use power, or an external power source can be plugged into the power strip 5 to charge the vehicle's battery pack. During normal use, the live wire terminal 21 and the conductive terminal 65 maintain good contact with the conductive rod 64. Figure 5 As shown, this connects the live wire, thereby providing stable power to electrical equipment or stable charging to the vehicle battery pack; at this time, the thermal spring 67 is in its natural state, and the insulating ring 66 will not affect the normal conduction of the charging and discharging circuit.

[0039] When the charging / discharging gun operates under high load for an extended period or malfunctions, causing its internal temperature to rise, the thermal spring 67 extends due to heat, pushing the conductive rod 64 to slide towards the rear. During this movement, the contact length between the conductive rod 64 and the live wire terminal 21 gradually decreases, while the contact length with the conductive terminal 65 increases accordingly, maintaining a stable conductive contact area and effectively preventing increased contact resistance and additional heat generation due to changes in contact area. If the temperature further rises to the cutoff threshold, the thermal spring 67 pushes the conductive rod 64, causing the insulating ring 66 to continue moving until the conductive rod 64 disengages from the live wire terminal 21, while the insulating ring 66 remains attached to the live wire terminal 21. Figure 6 As shown, this quickly cuts off the live wire, preventing leakage accidents caused by overheating and achieving efficient leakage protection.

[0040] This embodiment utilizes the ingenious combination of a thermal spring 67, a conductive rod 64, and an insulating ring 66. When the temperature is too high, the thermal spring 67 extends due to heat, pushing the conductive rod 64 to move. This causes the conductive rod 64 to disengage from the live wire terminal 21, while the insulating ring 66 remains attached to the live wire terminal 21. This precisely cuts off the live wire circuit and effectively avoids leakage caused by overheating. Compared with traditional electronic component protection methods, this method offers higher reliability and safety, and is unaffected by electronic component failures.

[0041] In addition, during the process of the thermal spring 67 being heated and driving the conductive rod 64 to move due to high temperature overload, before the live wire 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. This ensures that a stable conductive contact area is maintained during the transition phase when the temperature rises and the equipment is about to activate the cut-off protection mechanism. This effectively avoids the increase in contact resistance and additional heat generation caused by changes in contact area, further ensuring the safe and stable operation of the charging and discharging gun under abnormal operating conditions.

[0042] like Figures 4 to 6 As shown, in some embodiments of the electric vehicle leakage-proof charging and discharging gun, the leakage-proof device 6 further includes a fixed base 61, a front terminal support 62, and a rear terminal support 63 disposed within the gun base 1; the conductive rod 64 slides through the fixed base 61; the front terminal support 62 and the rear terminal support 63 are respectively disposed at the front end and rear end of the fixed base 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 together; the insulating ring 66 is slidably disposed within 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 together. This embodiment provides a fixed base 61, a front terminal support 62, and a rear terminal support 63 to facilitate the installation of the conductive rod 64, provide guidance for the conductive rod 64, and also help protect the contact positions of the conductive rod 64 with the live wire terminal 21 and the conductive terminal 65.

[0043] As shown in Figures 4 to 6 , the electric vehicle anti-creeping charging and discharging gun of the embodiment, in some embodiments, the anti-creeping device 6 further comprises an insulating heat-conducting rod 68 arranged in the conductive rod 64; the two ends of the insulating heat-conducting rod 68 abut against the rear end of the live terminal 21 and the front end of the conductive terminal 65, respectively. The insulating heat-conducting rod 68 can be made of ceramic, glass, mica or boron nitride (BN) material. In the embodiment, the insulating heat-conducting rod 68 is arranged to conduct heat to the surroundings of the thermal sensitive spring 67 through the insulating heat-conducting rod 68, so that the thermal sensitive spring 67 can timely sense the temperature rise change in the charging and discharging gun.

[0044] As shown in Figures 2 to 4 , Figures 7 to 10 , the electric vehicle anti-creeping charging and discharging gun of the embodiment, 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 comprises a rotating shaft 71 rotatably arranged in the heat dissipation window 11 and a cover ring 72 fixedly arranged on the heat dissipation window 11; one end of the rotating shaft 71 is provided with a rotating frame 711; the cover ring 72 is rotatably provided with a first rotating ring 73 in transmission connection with the rotating frame 711; a plurality of valve plates 74 are movably arranged between one surface of the cover ring 72 and the first rotating ring 73 in circumferential distribution; 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 circumferential wall of the first rotating ring 73 and the gun seat 1; the conductive rod 64 is connected with an insulating friction plate 69; the insulating friction plate 69 is in frictional contact with the friction circular platform 712.

[0045] Specifically, the insulating friction plate 69 extends a connecting rod; a strip-shaped hole is formed in the side wall of the fixed seat 61; the connecting rod is fixedly connected with the conductive rod 64 after penetrating through the strip-shaped hole, so as to realize that the conductive rod 64 drives the insulating friction plate 69 to move synchronously through the connecting rod, and the strip-shaped hole provides a space for the connecting rod to avoid; in normal use, the coil spring 75 makes the first rotating ring 73 drive each valve plate 74 to close the heat dissipation window 11, as shown in Figure 7 and Figure 8 , when the temperature in the charging and discharging gun rises, the thermal sensitive spring 67 pushes the conductive rod 64 to slide, the conductive rod 64 drives the insulating friction plate 69 to slide, the insulating friction plate 69 synchronously drives the rotating shaft 71 to rotate through frictional cooperation with the friction circular platform 712, the rotating shaft 71 drives the first rotating ring 73 to rotate against the elastic force of the coil spring 75, and the first rotating ring 73 drives each valve plate 74 to move to open the heat dissipation window 11, so that the heat in the charging and discharging gun can overflow from the heat dissipation window 11, as shown in Figure 9As shown, the heat dissipation effect is realized, the internal temperature of the charge-discharge gun is reduced, intelligent heat dissipation adjustment is realized, and stable operation of the charge-discharge gun in a high-temperature environment is ensured; if the temperature inside the charge-discharge gun is reduced after the heat dissipation effect of the heat dissipation window 11, the heat-sensitive spring 67 restores and shortens, that is, the first rotating ring 73 is driven to rotate in the reverse direction to close the heat dissipation window 11, preventing foreign matter or rainwater from entering the charge-discharge gun and causing damage; if the temperature further rises to a cutoff threshold, the heat-sensitive spring 67 steel continues to push the conductive rod 64 to slide, so that the insulating ring 66 cuts off the firewire line, such as Figure 6 As shown, the first rotating ring 73 drives each valve plate 74 to completely open the heat dissipation window 11, such as Figure 9 As shown.

[0046] As shown in Figure 2 , Figure 4 and Figure 8 , in some embodiments of the electric vehicle anti-creeping charge-discharge gun, the rotating shaft 71 is provided with a shaft hole 713 communicating with the heat dissipation window 11; the end of the shaft hole 713 is provided with a sponge 76; the outer peripheral wall of the rotating shaft 71 is provided with a pipe ring 77; the pipe ring 77 communicates with the shaft hole 713; the pipe ring 77 communicates with the inside of the conductive rod 64 through a connecting pipe part 771.

[0047] Specifically, the conductive rod 64 is a hollow structure, and the conductive rod 64 is provided with a heat dissipation gap communicating with the inside thereof; when the heat-sensitive spring 67 pushes the conductive rod 64 to slide, the insulating friction plate 69 drives the rotating shaft 71 to rotate, 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 in the inside of the conductive rod 64 enters the pipe ring 77 through the heat dissipation gap, the connecting pipe part 771, the shaft hole 713, and then passes through the sponge 76 and flows out from the heat dissipation window 11; thereby facilitating the reduction of the temperature in the inside of the conductive rod 64, and when the hot air passes through the sponge 76, the moisture in the sponge 76 can also be evaporated, so as to recycle the sponge 76. In this embodiment, the sponge 76 is arranged in the shaft hole 713, so that when each valve plate 74 opens the heat dissipation window 11, the sponge 76 can be used to block foreign matter or water droplets from entering the inside of the conductive rod 64 through the shaft hole 713, thereby enhancing the safety of the structure.

[0048] As shown in Figure 10 , Figure 13 and Figure 14As shown, the anti-creeping type charging and discharging gun for electric vehicles of the embodiment, in some embodiments, the first rotating ring 73 is provided with a driving pin 731 corresponding to each valve piece 74; the surface of the valve piece 74 facing the first rotating ring 73 is provided with a first driving hole 741; the driving pin 731 is movably embedded in the corresponding first driving hole 741; the cover ring 72 is provided with a second driving hole 721 corresponding to each valve piece 74; the surface of each valve piece 74 away from the first rotating ring 73 is provided with a driving boss 742; the driving boss 742 is movably embedded in the corresponding second driving hole 721. In this embodiment, by setting the driving pin 731 cooperating with the first driving hole 741, and the driving boss 742 cooperating with 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 drives each valve piece 74 to move at the same time, so as to close or open the heat dissipation window 11.

[0049] As shown in Figures 2 to 4 , Figures 7 to 9 As shown, the anti-creeping type charging and discharging gun for electric vehicles of the embodiment, in some embodiments, the other surface of the cover ring 72 is rotatably provided with a second rotating ring 78, the surface of the second rotating ring 78 is provided with a color card ring 79; the surface of the color card ring 79 is provided with a color band layer with gradually deepening color; the outer peripheral wall of the second rotating ring 78 is provided with elastic pawls 781 at intervals; the first rotating ring 73 is provided with a ratchet ring 732 unidirectionally meshing with the elastic pawls 781; when the first rotating ring 73 rotates, the elastic pawls 781 and the ratchet ring 732 are meshed to drive the second rotating ring 78 to rotate; the gun seat 1 is provided with an observation port 12 at a position corresponding to the color band layer.

[0050] Specifically, in normal use, the color band layer lighter color part corresponds to the position of the observation port 12, indicating that the charging and discharging gun has not experienced high temperature overload abnormal situation, and the user can intuitively understand the current normal working state of the equipment through the color presented by the observation port 12; when the heat-sensitive 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, 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 to dissipate heat, and at the same time, the first rotating ring 73 drives the second rotating ring 78 to rotate through the meshing transmission of the ratchet ring 732 and the elastic ratchet pawl 781, and the second rotating ring 78 drives the color card ring 79 to rotate, so that the color corresponding to the position of the observation port 12 is changed, and thus the high temperature situation in the charging and discharging gun is recorded; when the coil spring 75 drives the first rotating ring 73 to rotate in the opposite direction, the first rotating ring 73 will not drive the second rotating ring 78 to rotate due to the one-way meshing of the elastic ratchet pawl 781 and the ratchet ring 732, so as 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 by a certain angle, and as the number of high temperature overload situations increases, the color displayed by the observation port 12 gradually deepens, and the user can intuitively understand the situation of the charging and discharging gun experiencing high temperature overload abnormal situation, so as to facilitate timely inspection and maintenance of the equipment, prevent potential faults in advance, and improve the use safety.

[0051] As shown in Figure 3 , Figures 10 to 12 , Figure 15 , in some embodiments of the anti-creeping charging and discharging gun for electric vehicles, the outer peripheral wall of the rotating frame 711 is radially recessed with a plurality of circular arc sliding grooves 714; the plurality of circular arc sliding grooves 714 are distributed in the circumferential direction; each circular arc sliding groove 714 is slidably provided with a friction arc plate 715; the surface of the rotating frame 711 opposite to the valve plate 74 is recessed with an expansion groove 716 corresponding to each circular arc sliding groove 714; each friction arc plate 715 is provided with a guide shaft 7151 extending into the corresponding expansion groove 716; the guide shaft 7151 is sleeved with a reset spring 717 in the circular arc sliding groove 714; the reset spring 717 makes the outer surface of the friction arc plate 715 in friction contact with the inner peripheral wall of the first rotating ring 73; the guide shaft 7151 is sleeved with an expansion block 718 in the expansion groove 716, which expands after absorbing water; the expansion block 718 can be made of high-molecular water-absorbing resin, bentonite or hydrogel material; the surface of the rotating frame 711 opposite to the valve plate 74 and the gun seat 1 form an annular cavity 8; the annular cavity 8 is in communication with each expansion groove 716; the gun seat 1 is further embedded with a capillary tube 81; one end of the capillary tube 81 communicates with the annular cavity 8, and the other end penetrates out of the gun seat 1.

[0052] Specifically, initially, the return spring 717 applies a spring force to the friction arc plate 715, causing the friction arc plate 715 to protrude from the arc groove 714 and maintain frictional contact with the inner circumferential wall of the first rotating ring 73. Thus, when the rotating shaft 71 rotates, the rotating shaft 71, through the frictional force between each friction arc plate 715 and the first rotating ring 73, drives the first rotating ring 73 to rotate synchronously, causing each valve plate 74 to close or open the heat dissipation window 11. In rainy weather, rainwater flows into the annular cavity 8 through the capillary tube 81. Since the annular cavity 8 is connected to the expansion groove 716, the expansion block 718 in the expansion groove 716 can contact the water and expand. During the expansion process, the expansion block 718... The guide shaft 7151 generates an inward force on the friction arc plate 715, causing the friction arc plate 715 to overcome the elastic force of the return spring 717 and retract into the arc groove 714, thereby disengaging from the inner circumferential 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 the rod in the opposite direction when the coil spring 75 releases its stored energy, thereby driving each valve plate 74 to close the heat dissipation window 11. In this way, rainwater is effectively prevented from entering the charging and discharging gun through the heat dissipation window 11, protecting the internal circuits and components from rainwater corrosion, and improving the safety and reliability of the charging and discharging gun in harsh weather conditions.

[0053] After the rain stops, as the moisture inside the expansion block 718 gradually evaporates, the expansion block 718 returns to its original shape. Under the elastic force of the return spring 717, the friction arc plate 715 extends outward again and re-engages with the first rotating ring 73, restoring the transmission connection between the first rotating ring 73 and the rotating shaft 71.

[0054] This embodiment utilizes the synergistic effect of the expansion block 718, the reset spring 717, the friction arc plate 715, and the capillary tube 81 to achieve flexible transmission between leakage prevention and heat dissipation. This enables the automatic closure of the heat dissipation window 11 in rainy weather, effectively preventing rainwater from entering the charging and discharging gun, protecting the internal circuits and components from rainwater corrosion, and improving the safety and reliability of the charging and discharging gun in harsh weather conditions.

[0055] like Figure 2 As shown, in some embodiments of the electric vehicle leakage-proof charging and discharging gun, a latch 9 is hinged inside the gun base 1; the front end of the latch 9 extends outward through the gun head 2 and has a locking head 91; the rear end of the latch 9 has a button 92; the button 92 moves 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's charging and discharging port, and then release the button 92. At this time, the locking head 91 will lock tightly at the vehicle's charging and discharging port, preventing the charging and discharging gun from falling off, and further improving the reliability of the structure.

[0056] like Figure 2As shown, the electric leakage prevention type charging and discharging gun for electric vehicles of the embodiment is provided with a front end support 13 and a rear end support 14 in parallel in the gun seat 1 in some embodiments; an installation plate 15 is arranged between the front end support 13 and the rear end support 14; the live terminal 21 and the zero terminal 22 are arranged to penetrate the front end support 13; the electric leakage prevention device 6 is arranged on the installation plate 15; and the zero terminal 22 is electrically connected with the cable 3 after penetrating the rear end support 14. The front end support 13, the rear end support 14 and the installation plate 15 are arranged to install the live terminal 21, the zero terminal 22 and the electric leakage prevention device 6, so that the structure is more stable.

[0057] The above description is only the preferred embodiment of the present application, so equivalent changes or modifications made according to the structure, features and principles described in the patent application of the present application are included in the protection scope of the patent application of the present application.

Claims

1. An electric vehicle charging and discharging gun with leakage protection, characterized in that, The gun seat, the gun head arranged at the front end of the gun seat, and the leakage protector connected with the cable at the rear end of the gun seat; the leakage protector is connected with the power strip; the gun seat is internally provided with the anti-leakage device; the gun head is provided with at least the live terminal and the zero terminal electrically connected with the cable; The anti-leakage device comprises a conductive rod, a conductive terminal, an insulating ring and a thermal spring; the conductive rod is slidingly arranged in the gun seat; the front end of the conductive rod is slidingly sleeved with the rear end of the live terminal; the front end of the conductive terminal is slidingly 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 of the conductive rod and sleeved on the rear end of the live terminal; the thermal spring is arranged in the conductive rod; the two ends of the thermal spring are respectively in abutment with the live terminal and the inner wall of the conductive rod. 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 comprises a rotating shaft rotatingly arranged in the heat dissipation window and a cover ring fixedly arranged on the heat dissipation window; one end of the rotating shaft is provided with a rotating frame; the cover ring is rotatingly provided with a first rotating ring in transmission connection with the rotating frame; a plurality of valve pieces distributed in the circumferential direction are movably arranged between one 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 piece 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; The other end of the rotating shaft is provided with a friction circular platform; the conductive rod is connected with an insulating friction plate; the insulating friction plate is in frictional contact with the friction circular platform.

2. The electric vehicle charging and discharging gun according to claim 1, wherein The anti-leakage device further comprises a fixed seat, a front terminal support and a rear terminal support arranged in the gun seat; the conductive rod is slidingly penetrated through the fixed seat; the front terminal support and the rear terminal support are respectively arranged at the front end and the rear end of the fixed seat; the front end of the conductive rod and the rear end of the live terminal are respectively penetrated into the front terminal support and then sleeved with each other; the insulating ring is slidingly arranged in the front terminal support; the front end of the conductive terminal and the rear end of the conductive rod are respectively penetrated into the rear terminal support and then sleeved with each other.

3. The electric vehicle charging and discharging gun according to claim 1, wherein The anti-leakage device further comprises an insulating heat-conducting rod arranged in the conductive rod; the two ends of the insulating heat-conducting rod are respectively in abutment with the rear end of the live terminal and the front end of the conductive terminal.

4. The electric vehicle charging and discharging gun according to claim 1, wherein The rotating shaft is provided with a shaft hole in communication with the heat dissipation window; the end of the shaft hole is provided with a sponge; the outer peripheral wall of the rotating shaft is provided with a pipeline ring; the pipeline ring is in communication with the shaft hole; the pipeline ring is in communication with the inside of the conductive rod through a connecting pipe portion.

5. The electric vehicle charging and discharging gun according to claim 1, wherein The first rotating ring is respectively provided with a driving pin corresponding to each valve piece; the surface of the valve piece facing the first rotating ring is provided with a first driving hole; the driving pin is movably embedded in the corresponding first driving hole; the cover ring is respectively provided with a second driving hole corresponding to each valve piece; the surface of each valve piece away from the first rotating ring is provided with a driving boss; the driving boss is movably embedded in the corresponding second driving hole.

6. The electric vehicle charging and discharging gun according to claim 1, wherein The other surface of the cover ring is rotatingly provided with a second rotating ring; the surface of the second rotating ring is provided with a color card ring; the surface of the color card ring is provided with a color band layer with gradually deepening color; the outer peripheral wall of the second rotating ring is provided with elastic pawls at intervals; the first rotating ring is provided with a ratchet ring in one-way engagement with the elastic pawls; when the first rotating ring rotates, the second rotating ring is driven to rotate through the engagement transmission of the elastic pawls and the ratchet ring; The gun seat is provided with an observation port at the position corresponding to the color band layer.

7. The electric vehicle charging and discharging gun of claim 1, wherein, The outer peripheral wall of the rotating frame is radially concave with a plurality of circular arc sliding grooves; the plurality of circular arc sliding grooves are distributed in the circumferential direction; each circular arc sliding groove is slidably provided with a friction arc plate; the surface of the rotating frame opposite to the valve plate is concave with an expansion groove corresponding to each circular arc sliding groove; each friction arc plate is provided with a guide shaft extending into the corresponding expansion groove; the guide shaft is sleeved with a return spring in the circular arc 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; the guide shaft is sleeved with an expansion block that expands after absorbing water in the expansion groove; An annular cavity is formed between the surface of the rotating frame opposite to the valve plate and the gun seat; the annular cavity is in communication with each expansion groove; a capillary tube is further embedded in the gun seat; one end of the capillary tube is in communication with the annular cavity, and the other end penetrates out of the gun seat.

8. The electric vehicle charging and discharging gun of claim 1, wherein, A buckle is hingedly connected in the gun seat; the buckle is outwardly penetrated with a gun head at the front end and is provided with a clamping head; the rear end of the buckle is provided with a button; the button is movably penetrated out of the gun seat.

9. The electric vehicle charging and discharging gun of claim 1, wherein, The front end support and the rear end support are spaced and arranged side by side in the gun seat; the mounting plate is arranged between the front end support and the rear end support; the live terminal and the zero terminal are penetrated and arranged in the front end support; the anti-creeping device is arranged on the mounting plate; the zero terminal is electrically connected with the cable after penetrating the rear end support.

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