A charging adapter for AC / DC conversion

Abstract

The present application provides a charging conversion head for AC / DC conversion, including a conversion head, a plug-in board at the plug-in end of the conversion head, and a support assembly for plugging the conversion head with a charging gun. The support assembly includes an upper toothed rod and an arc rod connected to the car charging cover, a lower toothed rod and a support frame located at the lower end of the plug-in board, an arc-shaped tooth groove is provided at the inner end of the arc-shaped rod, and the arc-shaped tooth groove is used to mesh and connect the upper toothed rod. The outer end of the upper toothed rod is connected to a power assembly, and a linkage rope is provided between the upper toothed rod and the lower toothed rod, and the linkage rope is used to link the inner and outer movement of the arc rod and the rotation of the support frame; a cooling assembly. The cooling assembly includes a movable plate with two layers of metal sheets with different expansion coefficients and a liquefied hydrogen gas bag. The present application solves the problem that the car charging conversion head cannot quickly lift the growing charging gun when in use, and the risk of the charging gun falling off due to its excessive length increases the safety hazard.

Description

Technical Field

[0001] The invention relates to the technical field of automobile charging conversion heads, and in particular to a charging conversion head for alternating current (AC) and direct current (DC) conversion. Background Art

[0002] The AC / DC conversion charging adapter is designed and developed to solve some key technical problems in the field of new energy vehicle charging. With the rapid growth of the new energy vehicle market, the construction of charging infrastructure has become an important issue. Especially in highway service areas, most of the charging piles equipped are DC charging piles, which is difficult to charge for vehicles with only one AC charging socket. Therefore, it is necessary to develop a converter that can convert AC power into DC power so that vehicles can be charged on DC charging piles. In addition, with the internationalization of cities, more and more users need to use chargers that can adapt to the electrical standards of different countries and regions. Due to the inconsistency of international electrical standards, the socket specifications of each country are usually different, so users need to convert chargers with different national standard specifications when using portable electronic products between different countries and regions. This requires a charger adapter with stable structure, good conductive stability and easy use.

[0003] The prior art discloses an AC / DC gun head conversion head and a DC to AC charging adapter for new energy vehicles with a publication number of CN117040081A. The invention discloses an AC / DC gun head conversion head and a DC to AC charging adapter for new energy vehicles, belonging to the field of charging conversion for new energy vehicles. First, an AC / DC gun head conversion head including a DC voltage transmission line DC+, a DC voltage transmission line DC-, a communication bus S+ and a communication bus S- is designed. When a DC charging pile is used to charge a new energy vehicle, the AC / DC gun head conversion head is connected between the charging gun head of the DC charging pile and the AC charging socket of the new energy vehicle body, so that the new energy vehicle can be charged with DC fast. On the same vehicle, both DC charging and AC charging can be realized through only one AC charging socket. Compared with the two charging sockets in the prior art, the fast and slow charging costs of new energy vehicles are reduced.

[0004] This device cannot quickly lift the increased charging gun during use of the car charging adapter, and cannot physically cool down the device when overheating is detected during the lifting process. Therefore, we have made improvements to this and proposed an AC-DC conversion charging adapter. Summary of the invention

[0005] The purpose of the present invention is to address the problem that the current design of the automobile charging conversion head cannot quickly lift the increased charging gun, and during the lifting process, it cannot automatically perform physical cooling when overheating is detected.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A charging adapter for AC-DC conversion is provided to improve the above problems.

[0008] The specific application is as follows:

[0009] A charging converter for AC / DC conversion includes a converter, a plug-in board is provided at the plug-in end of the converter, an AC connector and a DC connector are provided at the front end of the plug-in board and at both ends of the converter, and further includes:

[0010] A support assembly is used for the plug-in support of the conversion head and the charging gun. The support assembly includes an upper toothed rod and an arc-shaped rod connected to the car charging cover, a lower toothed rod and a support frame located at the lower end of the plug-in board, an arc-shaped tooth groove is provided at the inner end of the arc-shaped rod, and the arc-shaped tooth groove is used to mesh and connect the upper toothed rod. The outer end of the upper toothed rod is connected to a power assembly, and a linkage rope is provided between the upper toothed rod and the lower toothed rod. The linkage rope is used to link the inner and outer movement of the arc-shaped rod and the rotation of the support frame;

[0011] The cooling component is used for overheating treatment during the charging process of the car. The cooling component includes a movable plate with two layers of metal sheets with different expansion coefficients and a liquefied hydrogen airbag. The movable plate is used to expand internally when the car is overheated during charging, and the movable plate opens to release hydrogen for cooling and fire prevention.

[0012] As a preferred technical solution of the present application, an embedded groove is provided at the outer end of the arc rod, and the arc rod rotates inward and outward along the embedded groove. The embedded groove is embedded and installed in the upper end of the plug-in board. A positioning groove is provided in the center of the upper toothed rod. The upper end of the linkage rope is fixed at the front end of the arc rod, and is used to move the linkage rope upward when the arc rod rotates outward.

[0013] As a preferred technical solution of the present application, a positioning short rod is provided at the other end of the linkage rope, a limit block is provided at the outer end of the positioning short rod, a limit groove is provided at the outer end of the limit block, a linkage spring is provided at the inner end of the limit groove, a screw is wrapped at the inner end of the linkage spring, spiral grooves are provided at both ends of the lower toothed rod, the limit grooves and the limit blocks facilitate the movement of the screw, the threaded connection between the spiral groove and the screw drives the rotation of the lower toothed rod, and the linkage spring is used to move the screw.

[0014] As a preferred technical solution of the present application, a toothed inner ring is provided between the lower toothed rod and the support frame, and the toothed inner ring passes through the outer surfaces of the left and right ends of the support frame. The setting of the toothed inner ring facilitates synchronous rotation with the support frame while driving the support frame to move in a limited position.

[0015] As a preferred technical solution of the present application, an inner linkage groove is provided at the upper end of the support frame, an upper linkage hole is provided at the upper end of the inner linkage groove, two linkage leather strips are wrapped around the inner ends of the upper linkage hole and the inner linkage groove, the lower ends of the two linkage leather strips are adhered to each other, a limiting rod is fixed to the lower end of the linkage leather strip, a limiting slide groove is provided at the outer end of the limiting rod, the limiting slide groove is used to provide moving space for the limiting rod when the support frame moves left and right, teeth may also be provided on the inner surface of the linkage leather strip, the outer end of the teeth is connected to an elastic rotation assembly, the elastic rotation assembly is located on the inner surface of the upper end of the support frame, and the lower end of the conversion head is attached to the elastic rotation assembly when the support frame is vertically positioned.

[0016] As a preferred technical solution of the present application, a linkage plate is provided at the upper end of the limit rod, a connecting spring is provided at the upper end of the linkage plate, a connecting tube is provided at the outer end of the connecting spring, and the connecting spring and the linkage plate are used to release the positioning when the conversion head is not connected to electricity.

[0017] As a preferred technical solution of the present application, a ruler spring and a positioning shaft are provided at the lower end of the movable plate, an outlet is provided at the inner end of the movable plate, the inner end of the outlet is connected through the liquefied hydrogen gas bag, and the other end of the liquefied hydrogen gas bag is connected with an injection port for injecting liquefied hydrogen when the liquefied hydrogen capacity in the liquefied hydrogen gas bag is too low.

[0018] As a preferred technical solution of the present application, the outer end of the liquefied hydrogen airbag is wrapped with an embedding groove, and the inner end of the embedding groove is provided with a scraper, which is used to help the liquefied hydrogen in the liquefied hydrogen airbag to flow out when the movable plate is opened.

[0019] As a preferred technical solution of the present application, a connecting rod is provided at the upper end of the scraper. The connecting rod is a retractable rod with elasticity such as a booster push rod, which is used to quickly close the outlet of the liquefied hydrogen airbag after the temperature difference on the movable plate is reduced and the expansion difference becomes smaller.

[0020] As the preferred technical solution of the present application, the movable end of the connecting rod is provided with a movable ball head, the outer end of the movable ball head is wrapped with a movable ball groove, the movable ball groove is embedded in the movable plate, and the movable ball groove and the movable ball head are used to avoid the change of the connecting rod angle when the movable plate rotates.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the scheme of this application:

[0023] 1. The outer length of the charging gun that is long due to the plug-in adapter is conveniently supported by the setting. The support frame is pushed out and retracted by using the support component and a group of power components when the charging cover is opened and closed, and a self-positioning component is set in the support frame to facilitate the longitudinal positioning of the support frame when lifting the adapter. In this process, the loss of electric energy is reduced, and the adapter can be well supported, reducing the excessive length of the outer end of the charging gun, pulling the interface, and then causing the adapter to be not fully plugged in, causing safety hazards;

[0024] 2. The teeth distributed on the inner end of the linkage strap are meshed with the elastic rotating assembly. When the linkage strap moves inward along the inner linkage groove, the elastic rotating assembly is pushed to rotate clockwise in the left view of the front section. After the linkage strap completely enters the inner linkage groove, the lower end of the adapter contacts the upper end of the elastic rotating assembly. At this time, the adapter is in a stationary state, and the elastic rotating assembly provides an inward thrust to the adapter in the left view of the front section, further providing the adapter with stable insertion.

[0025] 3. During the charging process, when the interface is overheated, the metal sheet with a high expansion coefficient will conflict with the outlet, driving the movable plate to rotate and open, releasing the liquefied hydrogen embedded in the groove to cool the charging part. When the movable plate rotates outward, it pulls the scraper embedded in the groove to move, and the movement of the scraper pushes the rear end of the liquefied hydrogen bag to squeeze, which is convenient for the outlet to accelerate the ejection of liquefied hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the overall structure of an AC-DC conversion charging adapter provided in this application;

[0027] Figure 2 A front view of an AC-DC charging adapter provided in the present application;

[0028] Figure 3 A schematic diagram of the structure of a converter head in front right view of an AC / DC conversion charging converter head provided in the present application;

[0029] Figure 4 A charging adapter for AC / DC conversion provided in this application Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0030] Figure 5 A charging adapter for AC / DC conversion provided in this application Figure 3 Schematic diagram of the enlarged structure of B;

[0031] Figure 6 A schematic diagram of a front view of a side section of a support frame of a charging adapter for AC / DC conversion provided in the present application;

[0032] Figure 7 A charging adapter for AC / DC conversion provided in this application Figure 6 Schematic diagram of the enlarged structure of C in the middle;

[0033] Figure 8 A charging adapter for AC / DC conversion provided in this application Figure 6 Schematic diagram of the enlarged structure of D in the middle;

[0034] Fig. 9 A schematic diagram of the side cross-sectional structure of the outlet of a Wildflower hydrogen bag of an AC-DC conversion charging adapter provided in this application.

[0035] Indicated in the figure:

[0036] 1. Converter; 2. AC connector; 3. DC connector; 4. Embedded slot; 5. Arc rod; 6. Arc tooth groove; 7. Upper tooth rod; 8. Positioning slot; 9. Linkage rope; 10. Positioning short rod; 11. Limit block; 12. Limit slot; 13. Linkage spring; 14. Screw; 15. Screw slot; 16. Lower tooth rod; 17. Support frame; 18. Toothed inner ring; 19. Inner linkage slot; 20. Linkage leather strip; 21. Limit rod; 22. Limit slide slot; 23. Upper linkage hole; 24. Linkage plate; 25. Connecting spring; 26. Connecting cylinder;

[0037] 27. Embedding groove; 28. Liquefied hydrogen gas bag; 29. ​​Injection port; 30. Outlet; 31. Movable plate; 32. Movable ball head; 33. Connecting rod; 34. Movable ball groove. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0039] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] like Figure 1-2 As shown, this embodiment proposes an AC-DC charging converter, including a converter 1, a plug-in board is provided at the plug-in end of the converter 1, and an AC connector 2 and a DC connector 3 are provided at the front end of the plug-in board and both ends of the converter 1.

[0042] When DC charging is required and the charging gun is an AC charging gun, the AC connector 2 of the converter 1 is plugged into the AC charging gun, and the DC connector 3 of the converter 1 is plugged into the DC connector 3 on the plug board. At this time, external DC charging can be performed;

[0043] When AC charging is required and the charging gun is a DC charging gun, the DC connector 3 of the converter 1 is plugged into the DC charging gun, and the AC connector 2 of the converter 1 is plugged into the AC connector 2 on the plug board. At this time, external AC charging can be used.

[0044] In both of the above cases, charging requires plugging in the charging gun and the charging pile because the power supply volts are inconsistent.

[0045] When the charging current of the charging gun and the charging pile do not match, it is easy to cause the current to be too high, causing battery damage, or the current to be insufficient, prolonging the charging time.

[0046] The purpose of replacing AC power with DC power is to protect the battery and increase the battery life without the need for fast charging.

[0047] like Figure 3-8 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a support assembly is used for the plug-in support of the conversion head 1 and the charging gun, the support assembly includes an upper toothed rod 7 and an arc rod 5 connected to the car charging cover, a lower toothed rod 16 and a support frame 17 located at the lower end of the plug-in board, the inner end of the arc rod 5 is provided with an arc tooth groove 6, the arc tooth groove 6 is used to mesh and connect the upper toothed rod 7, the outer end of the upper toothed rod 7 is connected with a power assembly, a linkage rope 9 is provided between the upper toothed rod 7 and the lower toothed rod 16, the linkage rope 9 is used to link the inward and outward movement of the arc rod 5 and the rotation of the support frame 17, the outer end of the arc rod 5 is provided with an embedded groove 4, the arc rod 5 rotates inward and outward along the embedded groove 4, the embedded groove 4 is embedded and installed at the upper end of the plug-in board, a positioning groove 8 is provided in the center of the upper toothed rod 7, the upper end of the linkage rope 9 is fixed to the front end of the arc rod 5, and the linkage rope 9 moves upward when the arc rod 5 rotates outward.

[0048] The upper toothed rod 7 is driven by the power assembly to push the meshing arc-shaped tooth groove 6 outward, and the arc-shaped rod 5 at the outer end of the arc-shaped tooth groove 6 moves outward along the embedded groove 4. When the arc-shaped rod 5 moves outward, the linkage rope 9 is pulled outward and removed, and the other side of the linkage rope 9 is pulled.

[0049] Through the operation of a set of power components, the charging cover can be opened and the support frame 17 at the lower end can be rotated outward, which facilitates the support frame 17 to provide support when the charging gun of the plug-in converter 1 is plugged into the plug board.

[0050] A positioning short rod 10 is provided at the other end of the linkage rope 9, and a limit block 11 is provided at the outer end of the positioning short rod 10. A limit groove 12 is provided at the outer end of the limit block 11, and a linkage spring 13 is provided at the inner end of the limit groove 12. A screw 14 is wrapped around the inner end of the linkage spring 13. Spiral grooves 15 are provided at both ends of the lower toothed rod 16. The limit groove 12 and the limit block 11 facilitate the movement of the screw 14, and the threaded connection between the spiral groove 15 and the screw 14 drives the rotation of the lower toothed rod 16. The linkage spring 13 is used for the movement of the screw 14.

[0051] When the linkage rope 9 is pulled upward, the screw rod 14 is driven to move outward along the spiral grooves 15 at both ends of the lower toothed rod 16. During the outward movement of the screw rod 14, the movement of the screw rod 14 is limited by the limit block 11 and the limit groove 12. Under such a limit, the screw rod 14 can move in the horizontal direction while pushing the spiral groove 15 to rotate, thereby pushing the lower toothed rod 16 to rotate outward, pushing the support rod to rotate outward, and facilitating the plugging of the conversion head 1;

[0052] And when the charging cover rotates, the linkage rope 9 can be pushed downward by the linkage spring 13 as the limit block 11 moves along the limit groove 12, and while stretching, the corresponding screw 14 is pushed to be threadedly connected with the spiral groove 15. In this process, it can be ensured that when the charging cover covers the plug board, the support frame 17 rotates inward, and the inner surface of the support frame 17 contacts with the plug board.

[0053] A toothed inner ring 18 is provided between the lower toothed rod 16 and the support frame 17. The toothed inner ring 18 penetrates the outer surfaces of the left and right ends of the support frame 17. The setting of the toothed inner ring 18 facilitates synchronous rotation with the support frame 17 while driving the support frame 17 to move in a limited position.

[0054] The meshing connection between the toothed inner ring 18 and the lower toothed rod 16 facilitates the stable connection between the support frame 17 and the lower toothed rod 16 when the support frame 17 moves left and right.

[0055] An inner linkage groove 19 is provided at the upper end of the support frame 17, and an upper linkage hole 23 is provided at the upper end of the inner linkage groove 19. Two linkage leather strips 20 are wrapped around the inner ends of the upper linkage hole 23 and the inner linkage groove 19. The lower ends of the two linkage leather strips 20 are adhered to each other. A limiting rod 21 is fixed to the lower end of the linkage leather strip 20. A limiting slide groove 22 is provided at the outer end of the limiting rod 21. The limiting slide groove 22 is used to provide activity space for the limiting rod 21 when the support frame 17 moves left and right.

[0056] The two linkage straps 20 protrude from the outer ends of the upper linkage holes 23 in the initial state. When the support frame 17 is in contact with the conversion head 1, the linkage straps 20 gradually move downward along the inner linkage groove 19. When the conversion head 1 is fully inserted into the plug board, the lower end of the limit rod 21 pushes the lower end of the support frame 17 and is embedded in the inner end of the limit slide groove 22, thereby ensuring the positioning of the support frame 17 and the stable positioning of the conversion head 1 by the support frame 17.

[0057] If the charging gun is not fully plugged in before charging, it will affect the charging efficiency and may cause tripping. If it is not fully plugged in during rainy or snowy weather, it is easy for the liquid to conduct electricity and cause leakage. Therefore, when the charging gun with the plug-in adapter is inserted into the socket board, a supporting component is needed to prevent the charging gun from falling off during charging.

[0058] The inner surface of the linkage strap 20 may also be provided with teeth, the outer end of the teeth is connected to an elastic rotating component, the elastic rotating component is located on the inner surface of the upper end of the support frame 17, and the lower end of the conversion head 1 is attached to the elastic rotating component when the support frame 17 is vertically positioned.

[0059] In another case, teeth are distributed on the inner end of the linkage strap 20, which is meshed with the elastic rotating component. When the linkage strap 20 moves inward along the inner linkage groove 19, it pushes the elastic rotating component to rotate clockwise in the left view of the front section. After the linkage strap 20 completely enters the inner linkage groove 19, the lower end of the adapter contacts the upper end of the elastic rotating component. At this time, the adapter is in a stationary state, and the elastic rotating component provides an inward thrust to the adapter in the left view of the front section, further providing stability for the insertion of the adapter.

[0060] A linkage plate 24 is provided at the upper end of the limiting rod 21, a connecting spring 25 is provided at the upper end of the linkage plate 24, a connecting tube 26 is provided at the outer end of the connecting spring 25, and the connecting spring 25 and the linkage plate 24 are used to release the positioning when the conversion head 1 is not connected to electricity.

[0061] After the conversion head 1 is pulled out, the limit rod 21 can be pushed upward by the spring connection 25 and the linkage plate 24 to release the connection between the limit rod 21 and the limit sliding groove 22 .

[0062] The upper toothed rod 7 is driven by the power assembly to open the charging cover and rotate the support frame 17 at the lower end outward, pushing the meshing arc-shaped tooth groove 6 outward, and the arc-shaped rod 5 at the outer end of the arc-shaped tooth groove 6 moves outward along the embedded groove 4. When the arc-shaped rod 5 moves outward, the linkage rope 9 is pulled outward to be removed, and the other side of the linkage rope 9 is pulled. When the linkage rope 9 is pulled upward, the screw rod 14 is driven to move outward along the spiral groove 15 at both ends of the lower toothed rod 16. In the process of the screw rod 14 moving outward, the movement of the screw rod 14 is limited by the limit block 11 and the limit groove 12. Under such a limitation, the screw rod 14 can move in the horizontal direction while pushing the spiral groove 15 to rotate, and then the lower toothed rod 16 can be pushed outward to rotate, and the support rod can be pushed outward to facilitate the plugging of the conversion head 1.

[0063] In another case, teeth are distributed on the inner end of the linkage strap 20, which is meshed with the elastic rotating component. When the linkage strap 20 moves inward along the inner linkage groove 19, it pushes the elastic rotating component to rotate clockwise in the left view of the front section. After the linkage strap 20 completely enters the inner linkage groove 19, the lower end of the adapter contacts the upper end of the elastic rotating component. At this time, the adapter is in a stationary state, and the elastic rotating component provides an inward thrust to the adapter in the left view of the front section, further providing stability for the insertion of the adapter.

[0064] When the adapter is removed, the two linkage straps 20 initially protrude from the outer ends of the upper linkage holes 23. When the support frame 17 is in contact with the conversion head 1, the linkage straps 20 gradually move downward along the inner linkage grooves 19. When the conversion head 1 is fully inserted into the plug board, the lower end of the limit rod 21 pushes the lower end of the support frame 17 and is embedded in the inner end of the limit slide groove 22, thereby ensuring the positioning of the support frame 17 and the stable positioning of the conversion head 1 through the support frame 17.

[0065] When the charging cover rotates, the linkage spring 13 can push the linkage rope 9 to stretch downward as the limit block 11 moves along the limit groove 12, and at the same time, push the corresponding screw 14 and the spiral groove 15 to be threadedly connected with each other. In this process, it can be ensured that when the charging cover covers the plug board, the support frame 17 rotates inward, and the inner surface of the support frame 17 contacts with the plug board.

[0066] like Figure 5 and Fig. 9 As shown, as a preferred embodiment, on the basis of the above method, further, a cooling component is used for overheating treatment during the charging process of the vehicle. The cooling component includes a movable plate 31 with two layers of metal sheets with different expansion coefficients and a liquefied hydrogen airbag 28. The movable plate 31 is used for opening the movable plate 31 to release hydrogen for cooling and fire prevention when the vehicle is overheated during charging.

[0067] The expansion difference working principle of the movable plate 31 is similar to that of a bimetallic temperature sensor: a composite material composed of two or more metals or other materials with suitable properties. The bimetallic strip is also called a thermal bimetallic strip. Since the thermal expansion coefficients of the component layers are different, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, so the entire bimetallic strip will bend toward the passive layer, and the curvature of the composite material will change, resulting in deformation.

[0068] When a difference occurs, the metal sheet with a high expansion coefficient can come into contact with the outlet 30, driving the movable plate 31 to rotate and open, thereby releasing the liquefied hydrogen in the embedded groove 27 and cooling the charging part.

[0069] The lower end of the movable plate 31 is provided with a ruler spring and a positioning shaft, and the inner end of the movable plate 31 is provided with an outlet 30, the inner end of the outlet 30 is connected to the liquefied hydrogen gas bag 28, and the other end of the liquefied hydrogen gas bag 28 is connected with an injection port 29, which is used to inject liquefied hydrogen when the liquefied hydrogen capacity in the liquefied hydrogen gas bag 28 is too low. The outer end of the liquefied hydrogen gas bag 28 is wrapped with an embedding groove 27, and the inner end of the embedding groove 27 is provided with a scraper, which is used to help the liquefied hydrogen in the liquefied hydrogen gas bag 28 flow out when the movable plate 31 is opened.

[0070] When the movable plate 31 rotates outward, the scraper embedded in the groove 27 is pulled to move, and the movement of the scraper pushes the rear end of the liquefied hydrogen gas bag 28 to squeeze, so that the outlet 30 accelerates the ejection of liquefied hydrogen.

[0071] A connecting rod 33 is provided at the upper end of the scraper. The connecting rod 33 is a retractable rod with elasticity and recoverable structure such as a booster push rod. It is used to quickly close the outlet 30 of the liquefied hydrogen gas bag 28 after the temperature difference on the movable plate 31 is reduced and the expansion difference becomes smaller. A movable ball head 32 is provided at the movable end of the connecting rod 33. The outer end of the movable ball head 32 is wrapped with a movable ball groove 34. The movable ball groove 34 is embedded in the movable plate 31. The movable ball groove 34 and the movable ball head 32 are used to avoid the change of the angle of the connecting rod 33 when the movable plate 31 rotates.

[0072] When the present application is in use: in order to facilitate the mutual plugging of the interfaces of the charging gun conversion head 1, the entire body is inserted into the plug-in board of the car charging port, the upper toothed rod 7 is driven by the power assembly to operate, which can realize the opening of the charging cover and the outward rotation of the support frame 17 at the lower end, pushing the meshing arc-shaped tooth groove 6 outward, and the arc-shaped rod 5 at the outer end of the arc-shaped tooth groove 6 moves outward along the embedded groove 4. When the arc-shaped rod 5 moves outward, the linkage rope 9 is pulled outward to be removed, and the other side of the linkage rope 9 is pulled. When the linkage rope 9 is pulled upward, the screw rod 14 is driven to move outward along the spiral groove 15 at both ends of the lower toothed rod 16. In the process of the screw 14 moving outward, the movement of the screw 14 is limited by the limit block 11 and the limit groove 12. Under such a limitation, the screw 14 can move in the horizontal direction while pushing the spiral groove 15 to rotate, and then the lower toothed rod 16 can be pushed outward to rotate, and the support rod can be pushed outward, which is convenient for the conversion head 1 to be plugged in;

[0073] In another case, teeth are distributed on the inner end of the linkage strap 20, which is meshed with the elastic rotating component. When the linkage strap 20 moves inward along the inner linkage groove 19, it pushes the elastic rotating component to rotate clockwise in the left view of the front section. After the linkage strap 20 completely enters the inner linkage groove 19, the lower end of the adapter contacts the upper end of the elastic rotating component. At this time, the adapter is in a stationary state, and the elastic rotating component provides an inward thrust to the adapter in the left view of the front section, further providing stability for the insertion of the adapter.

[0074] When the adapter is removed, the two linkage straps 20 initially protrude from the outer ends of the upper linkage holes 23. When the support frame 17 is in contact with the conversion head 1, the linkage straps 20 gradually move downward along the inner linkage grooves 19. When the conversion head 1 is fully inserted into the plug board, the lower end of the limit rod 21 pushes the lower end of the support frame 17 and is embedded in the inner end of the limit slide groove 22, thereby ensuring the positioning of the support frame 17 and the stable positioning of the conversion head 1 through the support frame 17.

[0075] When the charging cover rotates, the linkage spring 13 can push the linkage rope 9 to stretch downward as the limit block 11 moves along the limit groove 12, and at the same time, push the corresponding screw 14 and the spiral groove 15 to be threadedly connected with each other. In this process, it can be ensured that when the charging cover covers the plug board, the support frame 17 rotates inward, and the inner surface of the support frame 17 contacts with the plug board.

[0076] During the charging process, when the interface part is overheated, the metal sheet with a high expansion coefficient and the outlet 30 come into contact with each other, driving the movable plate 31 to rotate and open, releasing the liquefied hydrogen in the embedded groove 27 to cool the charging part. When the movable plate 31 rotates outward, it pulls the scraper in the embedded groove 27 to move, and the movement of the scraper pushes the rear end of the liquefied hydrogen gas bag 28 to squeeze, so that the outlet 30 accelerates the ejection of liquefied hydrogen.

[0077] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A charging adapter for AC / DC conversion, comprising an adapter (1), characterized in that: The plug-in end of the conversion head (1) is provided with a plug-in board, the front end of the plug-in board and both ends of the conversion head (1) are provided with an AC connector (2) and a DC connector (3), and further comprises: A support assembly is used for plugging and supporting the conversion head (1) and the charging gun, the support assembly comprising an upper toothed rod (7) and an arc-shaped rod (5) connected to the charging cover of the vehicle, a lower toothed rod (16) located at the lower end of the plug-in board, and a support frame (17), the inner end of the arc-shaped rod (5) is provided with an arc-shaped tooth groove (6), the arc-shaped tooth groove (6) is used for meshing and connecting with the upper toothed rod (7), the outer end of the upper toothed rod (7) is connected with a power assembly, a linkage rope (9) is provided between the upper toothed rod (7) and the lower toothed rod (16), the linkage rope (9) is used for linking the inward and outward movement of the arc-shaped rod (5) and the rotation of the support frame (17); A cooling component is used for overheating treatment during the charging process of an automobile. The cooling component comprises a movable plate (31) having two layers of metal sheets with different expansion coefficients and a liquefied hydrogen gas bag (28). When the automobile is overheated during charging, the movable plate (31) is used to expand inside the movable plate (31) and open the movable plate (31) to release hydrogen for cooling and fire prevention; The upper end of the support frame (17) is provided with an inner linkage groove (19), and the upper end of the inner linkage groove (19) is provided with an upper linkage hole (23). The inner ends of the upper linkage hole (23) and the inner linkage groove (19) are wrapped with two linkage leather strips (20), and the lower ends of the two linkage leather strips (20) are adhered to each other. A limit rod (21) is fixed to the lower end of the linkage leather strip (20), and a limit slide groove (22) is provided at the outer end of the limit rod (21). The limit slide groove (22) is used to provide a movable space for the limit rod (21) when the support frame (17) moves left and right. The inner surface of the linkage leather strip (20) can also be provided with teeth, and the outer end of the teeth is connected to an elastic rotation component. The elastic rotation component is located on the inner surface of the upper end of the support frame (17) and is used for the lower end of the conversion head (1) to be attached to the elastic rotation component when the support frame (17) is vertically positioned; The outer end of the liquefied hydrogen airbag (28) is wrapped with an embedding groove (27), and the embedding groove (27) is located on the central inner surface of the support frame (17). The inner end of the embedding groove (27) is provided with a scraper, and the scraper is used to help the liquefied hydrogen in the liquefied hydrogen airbag (28) to flow out when the movable plate (31) is opened.

2. The AC-DC charging adapter according to claim 1, characterized in that: The outer end of the arc rod (5) is provided with an embedded groove (4), the arc rod (5) rotates inward and outward along the embedded groove (4), the embedded groove (4) is embedded and installed on the upper end of the plug-in board, the center of the upper toothed rod (7) is provided with a positioning groove (8), the upper end of the linkage rope (9) is fixed to the front end of the arc rod (5), and is used for the linkage rope (9) to move upward when the arc rod (5) rotates outward.

3. The AC-DC charging adapter according to claim 2, characterized in that: The other end of the linkage rope (9) is provided with a positioning short rod (10), the outer end of the positioning short rod (10) is provided with a limiting block (11), the outer end of the limiting block (11) is provided with a limiting groove (12), the inner end of the limiting groove (12) is provided with a linkage spring (13), the inner end of the linkage spring (13) is wrapped with a screw rod (14), both ends of the lower toothed rod (16) are provided with spiral grooves (15), the limiting groove (12) and the limiting block (11) are used for the movement of the screw rod (14), and the threaded connection between the spiral groove (15) and the screw rod (14) drives the lower toothed rod (16) to rotate, and the linkage spring (13) is used for the movement of the screw rod (14).

4. The AC-DC charging adapter according to claim 3, characterized in that: A toothed inner ring (18) is provided between the lower toothed rod (16) and the support frame (17). The toothed inner ring (18) penetrates the outer surfaces of the left and right ends of the support frame (17). The arrangement of the toothed inner ring (18) facilitates synchronous rotation with the support frame (17) while driving the support frame (17) to move in a limited position.

5. The AC-DC charging adapter according to claim 1, characterized in that: A linkage plate (24) is provided at the upper end of the limiting rod (21), a connecting spring (25) is provided at the upper end of the linkage plate (24), a connecting tube (26) is provided at the outer end of the connecting spring (25), and the connecting spring (25) and the linkage plate (24) are used to release the positioning when the conversion head (1) is not connected to electricity.

6. The AC-DC charging adapter according to claim 5, characterized in that: The lower end of the movable plate (31) is provided with a ruler spring and a positioning shaft, the inner end of the movable plate (31) is provided with an outlet (30), the inner end of the outlet (30) is connected to the liquefied hydrogen gas bag (28), and the other end of the liquefied hydrogen gas bag (28) is connected with an injection port (29) for injecting liquefied hydrogen when the liquefied hydrogen capacity in the liquefied hydrogen gas bag (28) is too low.

7. The AC-DC charging adapter according to claim 1, characterized in that: A connecting rod (33) is provided at the upper end of the scraper. The connecting rod (33) is a booster push rod used to quickly close the outlet (30) of the liquefied hydrogen gas bag (28) after the temperature difference on the movable plate (31) is reduced and the expansion difference becomes smaller.

8. The AC-DC charging adapter according to claim 7, characterized in that: The movable end of the connecting rod (33) is provided with a movable ball head (32), the outer end of the movable ball head (32) is wrapped with a movable ball groove (34), and the movable ball groove (34) is embedded and installed in the movable plate (31). The movable ball groove (34) and the movable ball head (32) are used to prevent the angle of the connecting rod (33) from changing when the movable plate (31) rotates.

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