Waterproof power supply connector for electric vehicle

Abstract

The invention discloses a waterproof power connector for an electric vehicle, which relates to the technical field of connectors and comprises a plug male end, and a group of pins are arranged at the bottom of the inner wall of the plug male end. According to the plug-in connector, the second sealing ring is tightly attached to the interior of the male end of the plug and can isolate most of pollutants and part of water, when the second connecting ring descends, the air bag is driven to expand through a series of structures and is attached to the female end of the plug, most of water is effectively prevented from invading, the waterproof performance of the plug-in connector is further enhanced, the protruding rubber sleeve can intercept residual water, and the waterproof performance of the plug-in connector is improved. The three layers of sealing structures are progressive layer by layer, from preliminary isolation to core blocking, external moisture is prevented from invading into the plug-in connector in all directions, a temporary conductive path is prevented from being formed between contacts, the risks of contact corrosion and circuit board burnout caused by short-circuit current surge are eradicated fundamentally, metal contact oxidation or electrochemical corrosion can be avoided, and the service life of the plug-in connector is prolonged. The service time of equipment is obviously prolonged, and electric vehicle charging safety and equipment stability are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and specifically to a waterproof power connector for electric vehicles. Background Art

[0002] A connector is a component used to achieve quick and reliable connection and separation in electrical, electronic or mechanical systems. It realizes circuit conduction, signal transmission or energy transfer through physical contact. Its core functions include ensuring the stability of electrical connections, preventing misinsertion, adapting to environmental factors such as vibration or temperature changes, and having a certain degree of durability and safety protection capabilities. The application fields cover consumer electronics, industrial equipment, automobiles, aerospace and communication systems. According to their uses, they can be divided into power connectors, signal connectors and RF connectors.

[0003] Existing power connectors for electric vehicles have insufficient waterproof performance, and moisture is likely to penetrate into the internal structure, resulting in the formation of abnormal conductive paths between metal contacts with different potentials, thus inducing short-circuit faults, causing the melting and adhesion of contacts and the carbonization and ablation of copper foils on the circuit board. In extreme cases, it may even lead to thermal runaway of the battery pack or electrical fire. At the same time, the dissolved salt substances in the intruded water will cause galvanic corrosion of the metal contacts, reducing the service life and reliability of the connector. Summary of the Invention

[0004] The purpose of the present invention is to provide a waterproof power connector for electric vehicles, which realizes absolute dryness inside the connector through a three-layer sealing structure formed by a second sealing ring, an airbag and a rubber sleeve, so as to solve the problems raised in the above background.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A waterproof power connector for electric vehicles, including a male plug end. At the bottom of the inner wall of the male plug end, a group of pins is provided. On the outer surface wall of the male plug end, a hinge is fixedly installed. On the outer surface wall of the hinge, a dust cover is fixedly installed. An installation groove is opened on the inner surface wall of the male plug end. Four fixed chambers are opened inside the male plug end. On the outer surface wall of the male plug end, an ear is fixedly installed. At the bottom of the inner wall of the male plug end, four hollow bottom columns are fixedly installed. At the bottom of each of the four hollow bottom columns, a pipe one is fixedly communicated. And the outer surface walls of the four pipes one are fixedly inserted inside the fixed chambers. On the outer surface walls of the four hollow bottom columns, a first sealing ring is adhered. At the top of each of the four hollow bottom columns, a first spring is fixedly installed. The outer surface walls of the four hollow bottom columns are all sleeved with an outer shell, and the top of the inner wall of each of the four outer shells is fixedly connected to the top of the first spring. Between the output ends of the four pipes one, an airbag is fixedly communicated, and the outer surface of the airbag is adhered to one side of the inner wall of the installation groove. Four movable grooves are opened on the inner surface wall of the male plug end. On one side of the inner wall of each of the four movable grooves, a group of sliding grooves is opened. Inside the inner surface walls of the four groups of sliding grooves, sliders are movably embedded.

[0006] Preferably, a group of second springs are fixedly installed on one side of the inner walls of the four groups of sliding grooves, and the outer surfaces of the four groups of second springs are fixedly connected to the outer surface of the slider. On one side of the outer walls of the four groups of sliders, racks are fixedly installed. Between the outer surfaces of one of the four groups of sliders, a first push plate is fixedly installed. Between the outer surfaces of another one of the four groups of sliders, a second push plate is fixedly installed.

[0007] Preferably, fixing columns are fixedly installed on one side of the inner walls of the four movable grooves. The outer surfaces of the four fixing columns are movably sleeved with second gears, and the outer surfaces of the four gears are meshed with the outer surfaces of a group of racks.

[0008] Preferably, the outer surfaces of the four fixing columns are movably sleeved with ratchets, and one side of the outer walls of the four second gears is fixedly connected to one side of the outer walls of the ratchets. The inner surfaces of the four ratchets are meshed with pawls, and a group of third springs are fixedly installed on the tops of the four pawls.

[0009] Preferably, mounting shells are fixedly installed between the tops of the four groups of third springs. The inner surfaces of the four mounting shells are movably inserted with the outer surfaces of the pawls, and one side of the outer walls of the four mounting shells is fixedly connected to one side of the inner walls of the movable grooves. Moving holes are formed in the tops of the four mounting shells.

[0010] Preferably, push rods are fixedly installed on the tops of the four pawls. The inner surfaces of the four moving holes are movably inserted with the outer surfaces of the push rods, and the outer surfaces of the four push rods are movably inserted inside the male plug end. A pulling plate is fixedly installed between the tops of the four push rods.

[0011] Preferably, a connecting seat is movably inserted into the inner wall of the male plug end. The output end of the connecting seat is fixedly communicated with a female plug end. The inner surface of the female plug end is movably inserted with the outer surface of a group of pins. A second sealing ring is adhered to the outer surface of the female plug end.

[0012] Preferably, a rubber sleeve is adhered to one side of the outer wall of the female plug end. A first connecting ring is adhered to one side of the outer wall of the rubber sleeve. The inner surface of the first connecting ring is movably inserted with the outer surface of the female plug end, and the bottom of the first connecting ring is in contact with the top of the second push plate.

[0013] Preferably, a second connecting ring is fixedly sleeved on the outer surface of the female plug end, and the bottom of the second connecting ring is in contact with the top of the first push plate. A one-way valve is fixedly communicated with the input end of the male plug end. The input end of the one-way valve is fixedly communicated with a heat exchange pipe, and the input end of the heat exchange pipe is fixedly communicated with the output end of the male plug end.

[0014] Preferably, a set of radiating fins is fixedly sleeved on the outer surface wall of the heat exchange tube, and the outer surface walls between the set of radiating fins are fixedly connected to the outer surface wall of the male plug. A set of connecting plates is fixedly installed between the outer surface walls of the set of radiating fins, and the outer surface wall of the male plug is fixedly inserted between the inner surface walls of the set of connecting plates.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. In the present invention, the second sealing ring fits tightly inside the male plug, which can isolate the vast majority of pollutants and part of the moisture. When the second connecting ring descends, a series of structures drive the airbag to expand and fit with the female plug, effectively blocking the intrusion of the vast majority of moisture, further enhancing the waterproof performance of the connector. The protruding rubber sleeve can intercept the remaining moisture. The three-layer sealing structure progresses step by step, from the initial isolation to the core blockage, comprehensively preventing the intrusion of external moisture into the connector, avoiding the formation of a temporary conductive path between the contacts, fundamentally eliminating the risk of contact melting and circuit board burning caused by the sudden increase in short-circuit current, and also avoiding the oxidation or electrochemical corrosion of metal contacts, significantly extending the service life of the device, and ensuring the charging safety and device stability of the electric vehicle.

[0017] 2. In the present invention, during the process of compressing the air inside the compression housing and extruding the rubber sleeve, the ratchet and pawl mechanism can prevent the female plug from being accidentally pulled out due to slippery hands, accidental touch, children's play or pet dragging. It not only facilitates the user to quickly connect the connector, avoiding the risk of charging interruption or electric shock, but also ensures the safety and stability of the charging process.

[0018] 3. In the present invention, hot air flows inside the heat exchange tube and cooperates with the radiating fins to dissipate heat into the air through heat transfer, effectively controlling the internal temperature of the connector, avoiding the increase of contact resistance caused by overheating, reducing the equipment failure rate, and at the same time reducing the damage to the structure caused by thermal stress, and extending the service life of the equipment. Description of the Drawings

[0019] Figure 1 It is a three-dimensional front view structure diagram of a waterproof power connector for an electric vehicle according to the present invention;

[0020] Figure 2 It is a three-dimensional sectional view of a waterproof power connector for an electric vehicle according to the present invention;

[0021] Figure 3 It is a partially split top view of a waterproof power connector for an electric vehicle according to the present invention;

[0022] Figure 4 It is a partially sectional plan view of a waterproof power connector for an electric vehicle according to the present invention;

[0023] Figure 5It is a top-down perspective view of a partial structure in a waterproof power connector for an electric vehicle according to the present invention;

[0024] Figure 6 It is a schematic exploded view of a partial structure in a waterproof power connector for an electric vehicle according to the present invention;

[0025] Figure 7 It is a side view of a partial structure in a waterproof power connector for an electric vehicle according to the present invention;

[0026] Figure 8 It is a bottom view of a partial structure in a waterproof power connector for an electric vehicle according to the present invention;

[0027] Figure 9 It is a three-dimensional schematic diagram of a partial structure in a waterproof power connector for an electric vehicle according to the present invention.

[0028] In the figure: 1, male plug end; 2, pin; 3, hinge; 4, dust cover; 5, installation groove; 6, fixed chamber; 7, hanging ear; 8, hollow bottom column; 9, pipe 1; 10, seal ring 1; 11, spring 1; 12, outer shell; 13, airbag; 14, movable groove; 15, sliding groove; 16, slider; 17, spring 2; 18, rack; 19, push plate 1; 20, push plate 2; 21, fixed column; 22, gear; 23, ratchet; 24, pawl; 25, spring 3; 26, mounting shell; 27, movable hole; 28, push rod; 29, pull plate; 30, connecting seat; 31, female plug end; 32, seal ring 2; 33, rubber sleeve; 34, connecting ring 1; 35, connecting ring 2; 36, one-way valve; 37, heat exchange tube; 38, heat sink; 39, connecting plate. Detailed implementation manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1: Refer to Figures 1-9As shown in the figure, the present invention provides a waterproof power connector for an electric vehicle, which includes a male plug end 1. At the bottom of the inner wall of the male plug end 1, a group of pins 2 are arranged. On the outer wall of the male plug end 1, a hinge 3 is fixedly installed. On the outer wall of the hinge 3, a dust cover 4 is fixedly installed. An installation groove 5 is formed on the inner wall of the male plug end 1. Four fixed chambers 6 are formed inside the male plug end 1. On the outer wall of the male plug end 1, an ear 7 is fixedly installed. At the bottom of the inner wall of the male plug end 1, four hollow bottom columns 8 are fixedly installed. At the bottom of each of the four hollow bottom columns 8, a pipe 9 is fixedly communicated. And the outer walls of the four pipes 9 are fixedly inserted inside the fixed chambers 6. On the outer walls of the four hollow bottom columns 8, a sealing ring 10 is adhered. At the top of each of the four hollow bottom columns 8, a spring 11 is fixedly installed. On the outer walls of the four hollow bottom columns 8, a housing 12 is sleeved. And the top of the inner wall of each of the four housings 12 is fixedly connected to the top of the spring 11. Between the output ends of the four pipes 9, an airbag 13 is fixedly communicated. And the outer wall of the airbag 13 is adhered to one side of the inner wall of the installation groove 5. On the inner wall of the male plug end 1, four movable grooves 14 are formed. On one side of the inner wall of each of the four movable grooves 14, a group of sliding grooves 15 are formed. On the inner walls of the four groups of sliding grooves 15, sliders 16 are movably embedded. On one side of the inner wall of each of the four groups of sliding grooves 15, a group of springs 17 are fixedly installed. And the outer walls of the four groups of springs 17 are fixedly connected to the outer walls of the sliders 16. On one side of the outer walls of the four groups of sliders 16, racks 18 are fixedly installed. Between the outer walls of one of the four groups of sliders 16, a push plate 19 is fixedly installed. Between the outer walls of another one of the four groups of sliders 16, a push plate 20 is fixedly installed. On one side of the inner wall of each of the four movable grooves 14, fixed columns 21 are fixedly installed. On the outer walls of the four fixed columns 21, gears 22 are movably sleeved. And the outer walls of the four gears 22 are meshed with the outer walls of a group of racks 18 respectively;

[0031] The output end of the connecting seat 30 is fixedly communicated with a female plug end 31. And the inner wall of the female plug end 31 is movably inserted with the outer wall of a group of pins 2. On the outer wall of the female plug end 31, a sealing ring 32 is adhered. On one side of the outer wall of the female plug end 31, a rubber sleeve 33 is adhered. On one side of the outer wall of the rubber sleeve 33, a connecting ring 34 is adhered. And the inner wall of the connecting ring 34 is movably inserted with the outer wall of the female plug end 31. And the bottom of the connecting ring 34 is in contact with the top of the push plate 20. On the outer wall of the female plug end 31, a connecting ring 35 is fixedly sleeved. And the bottom of the connecting ring 35 is in contact with the top of the push plate 19.

[0032] In this embodiment, when the user needs to use this connector to charge an electric vehicle, the male end 1 of the plug needs to be taken out first, and then the dust cover 4 is rotated. The dust cover 4 will rotate and open under the action of the hinge 3. When the user stops rotating, the static friction between the hinges 3 will fix the position of the dust cover 4. The dust cover 4 can prevent external dust or pollutants from entering when the connector is not in use, thus affecting its normal use. Subsequently, hold the connecting seat 30 and insert it into the inside of the male end 1 of the plug. When the female end 31 of the plug provided on one side of the outer wall of the connecting seat 30 is connected to a group of pins 2, the entire connector is completed. During this process, three-layer sealing can be used to prevent external moisture from invading the connector. First, the second sealing ring 32 on the outer wall of the connecting seat 30 can cooperate with the inside of the male end 1 of the plug, which can effectively block the entry of the vast majority of pollutants and part of the moisture into the inside, completing the preliminary protection of the connector. Secondly, as the connecting seat 30 drives the female end 31 of the plug and continuously advances inside the male end 1 of the plug, the connecting ring 1 34 and the connecting ring 2 35 fixedly sleeved on its outer wall also descend together. When the bottom of the connecting ring 2 35 touches the top of the outer shell 12, as the connecting ring 2 35 continues to descend, it will drive the bottom outer shell 12 to descend synchronously and squeeze the internal first spring 11. As the outer shell 12 descends, the air stored inside it is squeezed and comes to the inside of the first pipe 9 at the bottom through the circulation holes in the hollow bottom column 8. The first sealing ring 10 on the outer wall of the hollow bottom column 8 effectively prevents the leakage of air during the flow. The air is then transported by the first pipe 9 and comes to the inside of the airbag 13. After the airbag 13 is inflated, it begins to expand and extends out of the installation groove 5. The inflated airbag 13 will closely fit with the female end 31 of the plug, blocking the entry of the vast majority of moisture. Finally, when the bottom of the connecting ring 2 35 touches the outer shell 12, its outer wall also touches the first push plate 19. Since the inner diameter of the first push plate 19 is smaller than the outer diameter of the connecting ring 2 35, when the connecting ring 2 35 descends, it will drive the first push plate 19 to descend synchronously. At this time, the rack 18 connected to the first push plate 19 descends and drives the slider 16 on one side of the outer wall to slide inside the chute 15, preventing the movement direction of the rack 18 from deviating. The rack 18 drives the gear 22 meshed with it to rotate on the surface of the fixed column 21. On the other side of the gear 22, the rack 18 is driven to rise. At this time, the second push plate 20 between the outer walls of the corresponding racks 18 rises synchronously, and by means of the connecting ring 1 34, it squeezes the rubber sleeve 33 at the top. The rubber sleeve 33 begins to bulge outwards and fits with the inner wall of the male end 1 of the plug, thereby intercepting the remaining moisture, ensuring that the inside is in an absolutely dry environment, avoiding the formation of a temporary conductive path between the contacts, fundamentally eliminating the risk of contact melting and circuit board burning caused by a sudden increase in short-circuit current, and also avoiding the oxidation or electrochemical corrosion of metal contacts, extending the service life of the equipment.

[0033] Embodiment 2: According to Figure 1 , Figure 2 and Figures 4-7As shown in the figure, on one side of the inner wall of each of the four movable slots 14, a set of sliding slots 15 is provided. On the inner surface walls of the four sets of sliding slots 15, sliders 16 are movably embedded. On one side of the inner walls of the four sets of sliding slots 15, a set of second springs 17 is fixedly installed, and between the outer surface walls of the four sets of second springs 17, they are fixedly connected to the outer surface wall of the slider 16. On one side of the outer walls of the four sliders 16, racks 18 are fixedly installed. Between the outer surface walls of one of the four sliders 16, a first push plate 19 is fixedly installed. Between the outer surface walls of another one of the four sliders 16, a second push plate 20 is fixedly installed. On one side of the inner wall of each of the four movable slots 14, fixed columns 21 are fixedly installed. On the outer surface walls of the four fixed columns 21, second gears 22 are movably sleeved, and on the outer surface walls of the four gears 22, they are meshed with the outer surface wall of a set of racks 18. On the outer surface walls of the four fixed columns 21, ratchets 23 are movably sleeved, and on one side of the outer walls of the four second gears 22, they are fixedly connected to the outer wall of the ratchet 23. On the inner surface walls of the four ratchets 23, pawls 24 are meshed. On the top of each of the four pawls 24, a set of third springs 25 is fixedly installed. Between the tops of the four sets of third springs 25, a mounting shell 26 is fixedly installed, and on the inner surface wall of each of the four mounting shells 26, it is movably inserted with the outer surface wall of the pawl 24, and on one side of the outer wall of each of the four mounting shells 26, it is fixedly connected to the inner wall of the movable slot 14. On the top of each of the four mounting shells 26, a movable hole 27 is provided. On the top of each of the four pawls 24, a push rod 28 is fixedly installed, and on the inner surface wall of each of the four movable holes 27, it is movably inserted with the outer surface wall of the push rod 28, and between the outer surface walls of the four push rods 28, they are movably inserted into the male plug end 1. Between the tops of the four push rods 28, a pulling plate 29 is fixedly installed.

[0034] In this embodiment, when the female plug end 31 is inserted into the male plug end 1 and then drives the gear 22 to rotate, the gear 22 starts to drive the ratchet 23 connected to it to move synchronously. The ratchet 23 will continuously push up the pawl 24. At this time, the pawl 24 starts to squeeze the third spring 25 on the top, and under the push of the third spring 25, it is inserted into the ratchet 23. This ratchet 23 and pawl 24 mechanism, by the pawl 24 locking the ratchet 23, enables the ratchet 23 to only move in one direction, and is locked in the reverse direction. Since whether it is compressing the air inside the compression shell 12 or squeezing the rubber sleeve 33, certain resistance will be encountered. Therefore, this mechanism can prevent the female plug end 31 from being forced to pop out of the male plug end 1 due to hand slipping during use, and can also prevent the connector from being accidentally pulled out due to accidental touch by the user, children playing, or pet dragging during use, resulting in charging interruption or electric shock risk. When the user needs to separate the two, only need to pull the pulling plate 29. At this time, the push rod 28 connected to the pulling plate 29 moves synchronously. The push rod 28 drives the ratchet 23 to squeeze the third spring 25 and separates from the ratchet 23. At this time, the gear 22 and the ratchet 23 can rotate freely, facilitating the quick extraction of the female plug end 31.

[0035] Embodiment 3: According to Figure 1 、Figure 2 , Figure 4 , Figure 8 and Figure 9 As shown in Figure 9 , a check valve 36 is fixedly communicated with the input end of the male plug end 1. The input end of the check valve 36 is fixedly communicated with a heat exchange tube 37, and the input end of the heat exchange tube 37 is fixedly communicated with the output end of the male plug end 1. A group of heat dissipation fins 38 are fixedly sleeved on the outer wall of the heat exchange tube 37, and the outer walls of the group of heat dissipation fins 38 are fixedly connected to the outer wall of the male plug end 1. A group of connecting plates 39 are fixedly installed between the outer walls of the group of heat dissipation fins 38, and the inner walls of the group of connecting plates 39 are fixedly inserted into the outer wall of the male plug end 1.

[0036] In this embodiment, when the connector is working, heat will continuously accumulate inside. As the air at the bottom of the male plug end 1 is heated and expands, the air will enter the inside of the heat exchange tube 37. The check valve 36 can control the air flow direction to ensure the smooth flow of air inside the heat exchange tube 37. The hot air comes to the outside of the male plug end 1 along with the heat exchange tube 37 and cooperates with a group of heat dissipation fins 38 fixedly sleeved on the outer wall of the heat exchange tube 37. The heat is dissipated into the air by means of heat transfer, the internal temperature is controlled within a reasonable range, the increase of contact resistance caused by overheating is avoided, the equipment failure rate is reduced, the internal temperature can also be stabilized, the damage to the structure caused by thermal stress is reduced, and the service life of the equipment is prolonged.

[0037] The working principle of the whole mechanism is as follows: When the user needs to use the connector to charge an electric vehicle, first, take out the male plug 1, and then rotate the dust cover 4. Under the action of the hinge 3, the dust cover 4 will rotate and open accordingly. After stopping the rotation, the static friction force between the hinges 3 will fix the dust cover 4 at a specific position. The dust cover 4 can effectively prevent external dust and pollutants from entering when the connector is not in use. Subsequently, the user holds the connecting seat 30 and inserts it into the inside of the male plug 1. When the female plug 31 provided on one side of the outer wall of the connecting seat 30 is successfully connected to a group of pins 2, the connection work of the whole connector is completed. During this connection process, the connector adopts a three-layer sealing design to effectively prevent external moisture from invading. The second sealing ring 32 on the outer surface wall of the connecting seat 30 fits tightly with the inside of the male plug 1. As the first layer of sealing, it can isolate most pollutants and part of the moisture, providing preliminary protection for the connector. As the connecting seat 30 drives the female plug 31 to continuously advance inside the male plug 1, the first connecting ring 34 and the second connecting ring 35 fixedly sleeved on its outer surface wall also descend accordingly. When the bottom of the second connecting ring 35 touches the top of the outer shell 12 and continues to descend, it will drive the outer shell 12 to descend synchronously and compress the first spring 11 inside. During the descent of the outer shell 12, the air stored inside is compressed and enters the inside of the first pipe 9 at the bottom through the flow holes in the hollow bottom column 8. The first sealing ring 10 on the outer surface wall of the hollow bottom column 8 effectively prevents air leakage during the flow. Then the air is transported to the inside of the airbag 13 through the first pipe 9. After the airbag 13 is inflated and expands, it extends out of the installation groove 5 and fits tightly with the female plug 31, becoming the second layer of sealing, thereby blocking most of the moisture from invading. When the bottom of the second connecting ring 35 touches the outer shell 12, its outer surface wall also touches the first push plate 19. Since the inner diameter of the first push plate 19 is smaller than the outer diameter of the second connecting ring 35, the descent of the second connecting ring 35 will drive the first push plate 19 to descend synchronously. At this time, the rack 18 connected to the first push plate 19 descends and drives the slider 16 on one side of the outer wall to slide inside the chute 15 to ensure the accurate movement direction of the rack 18. The rack 18 drives the gear 22 meshed with it to rotate on the surface of the fixed column 21. The rack 18 on the other side of the gear 22 rises accordingly, and the second push plate 20 between the outer surface walls of the corresponding racks 18 rises synchronously and squeezes the rubber sleeve 33 at the top with the help of the first connecting ring 34, causing the rubber sleeve 33 to bulge outwards and fit with the inner surface wall of the male plug 1, becoming the third layer of sealing to intercept the remaining moisture and ensure that the inside of the connector is in an absolutely dry environment. In addition, when the female plug 31 is inserted into the inside of the male plug 1 and drives the gear 22 to rotate, the gear 22 will drive the ratchet 23 connected to it to move synchronously. The ratchet 23 will continuously push up the pawl 24. The pawl 24 compresses the third spring 25 at the top and inserts into the inside of the ratchet 23 under the push of the third spring 25. This ratchet 23-pawl 24 mechanism locks the ratchet 23 by the pawl 24, making the ratchet 23 move only in one direction and being locked in the reverse direction. Since there will be certain resistance when compressing the air inside the outer shell 12 and squeezing the rubber sleeve 33,This mechanism can prevent the female end 31 of the plug from popping out of the male end 1 of the plug due to slippery hands during use, and can also prevent the connector from being accidentally pulled out due to accidental touch by the user, playing by children or dragging by pets. If the user needs to separate the female end 31 of the plug from the male end 1 of the plug, just pull the pull plate 29. At this time, the push rod 28 connected to the pull plate 29 moves synchronously. The push rod 28 drives the ratchet wheel 23 to squeeze the spring three 25, so that the ratchet wheel 23 is separated from the pawl 24. At this time, the gear 22 and the ratchet wheel 23 can rotate freely, which is convenient for quickly pulling out the female end 31 of the plug. During the operation of the connector, heat will continuously accumulate inside. As the air at the bottom of the male end 1 of the plug is heated and expands, the air will enter the inside of the heat exchange tube 37. The one-way valve 36 can control the air flow direction to ensure that the air flows smoothly inside the heat exchange tube 37. The hot air comes to the outside of the male end 1 of the plug along with the heat exchange tube 37 and cooperates with a set of heat dissipation fins 38 fixedly sleeved on the outer wall of the heat exchange tube 37, and the heat is dissipated into the air by means of heat transfer, so as to control the temperature inside the connector within a reasonable range.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric vehicle waterproof power connector, including a male plug end (1), characterized in that: At the bottom of the inner wall of the male plug end (1), a group of pins (2) is provided. On the outer wall of the male plug end (1), a hinge (3) is fixedly installed. On the outer wall of the hinge (3), a dust cover (4) is fixedly installed. An installation groove (5) is formed on the inner wall of the male plug end (1). Four fixed chambers (6) are formed inside the male plug end (1). An ear (7) is fixedly installed on the outer wall of the male plug end (1). Four hollow bottom columns (8) are fixedly installed at the bottom of the inner wall of the male plug end (1). At the bottom of each of the four hollow bottom columns (8), a pipe one (9) is fixedly communicated. The outer walls of the four pipes one (9) are fixedly inserted into the fixed chambers (6). Sealing rings one (10) are adhered to the outer walls of the four hollow bottom columns (8). At the top of each of the four hollow bottom columns (8), a spring one (11) is fixedly installed. The outer walls of the four hollow bottom columns (8) are sleeved with outer shells (12), and the top of the inner wall of each of the four outer shells (12) is fixedly connected to the top of the spring one (11). Between the output ends of the four pipes one (9), an airbag (13) is fixedly communicated, and the outer wall of the airbag (13) is adhered to one side of the inner wall of the installation groove (5). Four moving grooves (14) are formed on the inner wall of the male plug end (1). On one side of the inner wall of each of the four moving grooves (14), a group of sliding grooves (15) is formed. On the inner wall of each of the four groups of sliding grooves (15), a slider (16) is movably embedded.

2. The waterproof power connector for electric vehicles according to claim 1, characterized in that: On one side of the inner wall of each of the four groups of sliding grooves (15), a group of spring two (17) is fixedly installed. The outer walls of the four groups of spring two (17) are fixedly connected to the outer wall of the slider (16). On one side of the outer wall of each of the four sliders (16), a rack (18) is fixedly installed. Between the outer walls of one of the four sliders (16), a push plate one (19) is fixedly installed. Between the outer walls of another one of the four sliders (16), a push plate two (20) is fixedly installed.

3. The waterproof power connector for an electric vehicle according to claim 2, characterized in that: On one side of the inner wall of each of the four moving grooves (14), a fixed column (21) is fixedly installed. On the outer wall of each of the four fixed columns (21), a gear two (22) is movably sleeved. The outer walls of the four gears (22) are meshed with the outer wall of a group of racks (18).

4. The waterproof power connector for an electric vehicle according to claim 3, characterized in that: On the outer wall of each of the four fixed columns (21), a ratchet wheel (23) is movably sleeved. On one side of the outer wall of each of the four gears two (22), it is fixedly connected to the outer wall of the ratchet wheel (23). The inner walls of the four ratchet wheels (23) are meshed with pawls (24). On the top of each of the four pawls (24), a group of spring three (25) is fixedly installed.

5. The waterproof power connector for an electric vehicle according to claim 4, characterized in that: Between the tops of the four groups of spring three (25), an installation shell (26) is fixedly installed. The inner wall of each of the four installation shells (26) is movably inserted with the outer wall of the pawl (24). One side of the outer wall of each of the four installation shells (26) is fixedly connected to one side of the inner wall of the moving groove (14). On the top of each of the four installation shells (26), a moving hole (27) is formed.

6. The waterproof power connector for an electric vehicle according to claim 4, characterized in that: Push rods (28) are fixedly installed at the tops of the four pawls (24), and the inner walls of the four moving holes (27) are movably inserted with the outer walls of the push rods (28). The outer walls of the four push rods (28) are movably inserted inside the male plug end (1), and a pull plate (29) is fixedly installed between the tops of the four push rods (28).

7. The waterproof power connector for an electric vehicle according to claim 2, characterized in that: A connecting seat (30) is movably inserted into the inner wall of the male plug end (1). The output end of the connecting seat (30) is fixedly communicated with a female plug end (31). The inner wall of the female plug end (31) is movably inserted with the outer wall of a group of pins (2), and a second sealing ring (32) is adhered to the outer wall of the female plug end (31).

8. An electric vehicle waterproof power connector according to claim 7, characterized in that: A rubber sleeve (33) is adhered to one side of the outer wall of the female plug end (31). A first connecting ring (34) is adhered to one side of the outer wall of the rubber sleeve (33). The inner wall of the first connecting ring (34) is movably inserted with the outer wall of the female plug end (31), and the bottom of the first connecting ring (34) is in contact with the top of the second push plate (20).

9. The waterproof power connector for an electric vehicle according to claim 8, wherein: A second connecting ring (35) is fixedly sleeved on the outer wall of the female plug end (31), and the bottom of the second connecting ring (35) is in contact with the top of the first push plate (19). A one-way valve (36) is fixedly communicated with the input end of the male plug end (1). The input end of the one-way valve (36) is fixedly communicated with a heat exchange pipe (37), and the input end of the heat exchange pipe (37) is fixedly communicated with the output end of the male plug end (1).

10. The waterproof power connector for an electric vehicle according to claim 9, characterized in that: A group of heat dissipation fins (38) are fixedly sleeved on the outer wall of the heat exchange pipe (37). The outer walls of the group of heat dissipation fins (38) are fixedly connected to the outer wall of the male plug end (1). A group of connecting plates (39) are fixedly installed between the outer walls of the group of heat dissipation fins (38), and the inner walls of the group of connecting plates (39) are fixedly inserted with the outer wall of the male plug end (1).

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