Structurally compact liquid-cooled charging gun

Abstract

A structurally compact liquid-cooled charging gun, comprising a gun body housing (1). One end of the gun body housing (1) is connected to a charging gun head (2); a mounting support (3) is arranged in the gun body housing (1); terminal assemblies (4) and at least two cables (5) connected to the terminal assemblies (4) are arranged on the mounting support (3); a cooling pipe (6) is sleeved around the outer periphery of each cable (5), and a cooling flow channel (7) is formed between the cable (5) and the cooling pipe (6) located around the outer periphery thereof; a liquid inlet hole (8) is formed in the mounting support (3); a liquid inlet pipe (9) is connected to the mounting support (3); the liquid inlet pipe (9) is communicated with the liquid inlet hole (8); flow distribution channels (10) communicated with the liquid inlet hole (8) are provided in the mounting support (3); the number of flow distribution channels (10) is the same as that of cooling flow channels (7); and the end of each flow distribution channel (10) distant from the liquid inlet hole (8) is communicated with one cooling flow channel (7). The space occupied by a cooling structure in the charging gun is reduced, thereby improving the installation and use effects of the charging gun while ensuring the internal cooling effect of the charging gun.

Description

A compact liquid-cooled charging gun Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging guns, and in particular to a liquid-cooled charging gun with a compact structure. Background Art

[0002] Driven by policy and environmental protection requirements, electric vehicles are rapidly becoming popular. In recent years, with the development of electric vehicle battery technology and the demand for electric vehicle charging speed, the charging rate of electric vehicle charging guns has continued to increase, and the manufacturing requirements of charging guns have also been continuously improved.

[0003] During use, the charging gun and its cable generate a significant amount of heat in a short period of time due to the inherent resistance of the wiring harness, causing them to heat up rapidly. As the temperature of the connection point between the charging gun plug and the vehicle socket, as well as the charging gun cable, rises, thermal resistance increases, and the charging current decreases, thereby reducing charging efficiency. Furthermore, prolonged exposure of the insulation material and contacts to high temperatures accelerates aging of the cable and contacts, shortening the overall service life of the charging gun. Therefore, a cooling structure is typically incorporated into the charging gun to cool the cable.

[0004] The existing cooling structure usually involves putting a cooling tube around the outside of each cable inside the charging gun, forming a cooling channel between the cable and the cooling tube, and each cooling tube is fixedly connected to a liquid inlet pipe, through which coolant is input into the cooling channel inside the charging gun, thereby cooling the cables inside the charging gun.

[0005] In order to facilitate the user's grip and use, the existing charging gun has corresponding restrictions on the overall structural shape and size of the charging gun, resulting in a very compact usable space inside the charging gun. However, the existing cooling structure is complex and occupies a large space inside the charging gun, which causes many inconveniences during the installation and use of the charging gun.

[0006] Summary of the Invention

[0007] In order to reduce the space occupied by the cooling structure inside the charging gun, while ensuring the internal cooling effect of the charging gun and improving the installation and use effect of the charging gun, the present application provides a compact liquid-cooled charging gun.

[0008] This application provides a compact liquid-cooled charging gun, which adopts the following technical solutions:

[0009] A compact liquid-cooled charging gun comprises a gun body shell, one end of the gun body shell is connected to a charging gun head, a mounting bracket is provided in the gun body shell, a terminal assembly and at least two cables connected to the terminal assembly are provided on the mounting bracket, a cooling pipe is sleeved on the circumferential periphery of each cable, and a cooling channel is formed between the cable and the cooling pipe around it, a liquid inlet hole is provided on the mounting bracket, a liquid inlet pipe is connected to the mounting bracket, the liquid inlet pipe is communicated with the liquid inlet hole, a diversion channel communicated with the liquid inlet hole is provided in the mounting bracket, the number of the diversion channels is the same as the number of the cooling channels, and each of the diversion channels is communicated with one of the cooling channels at one end away from the liquid inlet hole.

[0010] By adopting the above-mentioned technical solution, the liquid inlet hole and diversion channel arranged inside the mounting bracket are utilized to help connect one liquid inlet hole with multiple cooling channels, thereby helping to ensure the cooling effect of the cables inside the charging gun while reducing the space occupied by the cooling structure inside the charging gun, thereby helping to improve the installation and use effect of the internal structure of the charging gun.

[0011] In a specific possible implementation scheme, the terminal assembly includes a power terminal and an insert pin, the insert pin is arranged inside the power terminal, and the cable is connected to the end of the insert pin, one end of the cooling tube is connected to the end of the power terminal, and a connecting hole connected to the cooling channel is provided on the power terminal, and the connecting hole is connected to the opening of the diversion channel away from the liquid inlet hole.

[0012] By adopting the above technical solution, the connecting hole is used to help connect the diversion channel with the cooling channel, thereby helping to ensure the smooth flow of the coolant in the cooling channel, thereby ensuring the cooling effect of the cable.

[0013] In a specific feasible implementation scheme, the power terminal is provided with a mounting slot, the mounting bracket is provided with a mounting protrusion for engaging with the mounting slot, a first mounting platform is provided on the slot wall of the mounting slot, the opening of the communicating hole is located on the first mounting platform, the mounting protrusion is provided with a second mounting platform for fitting with the first mounting platform, the opening of the shunt channel is located on the second mounting platform, the mounting bracket is provided with a terminal fixing piece for fixing the power terminal on the mounting bracket, the mounting bracket is also provided with a screw for locking the terminal fixing piece, the terminal fixing piece abuts against the slot wall of the mounting slot, a sealing ring groove is provided on the second mounting platform, the sealing ring groove is located on the circumferential periphery of the shunt channel and is connected to the shunt channel, the sealing ring groove is provided with a sealing ring, and the sealing ring abuts against the first mounting platform.

[0014] By adopting the above technical solution, the installation slots and mounting protrusions help secure the power terminals to the mounting bracket. The terminal fixing piece helps lock and secure the power terminals to the mounting bracket, thereby improving the stability of the connection between the power terminals and the mounting bracket. The first and second mounting platforms help improve the sealing effect of the connection between the connecting hole and the diversion channel.

[0015] In a specific possible implementation scheme, a fixed column is provided in the liquid inlet hole, and the fixed column is arranged along the axial direction of the liquid inlet hole and is connected to the mounting bracket. A sliding ring is slidably provided on the fixed column, and a supporting spring is sleeved on the fixed column, one end of the supporting spring is connected to the sliding ring, and the other end is connected to the mounting bracket. A truncated cone-shaped buffer structure is provided on the circumference of the sliding ring, and the circumferential outer diameter of the buffer structure gradually increases along the flow direction of the liquid in the liquid inlet hole. The sliding of the sliding ring can change the shape of the buffer structure, thereby changing the buffering effect of the buffer structure on the liquid flowing in the liquid inlet hole;

[0016] The buffer structure includes a buffer sheet and a folding connecting sheet. The number of the buffer sheet and the folding connecting sheet is the same and there are at least two of them. The buffer sheet and the folding connecting sheet are both connected to the sliding ring. The folding connecting sheet can be folded and arranged between two adjacent buffer sheets. The buffer sheet is arranged in a fan shape. The folding connecting sheet is connected to the adjacent buffer sheets and is used to seal the gap between two adjacent buffer sheets.

[0017] By adopting the above technical solution, when the coolant just starts to enter the liquid inlet hole, under the impact of the coolant, the sliding ring slides along the fixed column toward the direction of coolant flow, thereby driving the support spring to contract, and at the same time causing the buffer plate and the folded connecting plate to gradually open, thereby buffering the coolant.

[0018] In a specific feasible implementation scheme, a sliding groove is axially provided on the outer wall of the fixed column, a slider for sliding in the sliding groove is provided on the sliding ring, a bypass hole is axially provided on the fixed column, and a plurality of mounting grooves for communicating with the sliding groove are provided on the hole wall at one end of the bypass hole. A sealing plate for sealing the bypass hole can be movably provided in each of the mounting grooves, the sealing plate is in contact with the slider, and a magnet is provided on each of the sealing plates, and the multiple magnets repel each other.

[0019] By adopting the above technical solution, when the sliding ring slides along the fixed column toward the direction of coolant flow, it drives the slider to slide in the slide groove, so that the slider no longer abuts the sealing plate, and under the mutual repulsion of multiple magnets and the impact of the coolant, the sealing plate gradually moves to the inside of the installation groove, so that the multiple sealing plates no longer block the diversion holes, so that the coolant can flow into the diversion holes; after the coolant flows stably in the liquid inlet hole, the impact force on the buffer plate and the folded connecting plate is reduced, and at the same time, under the elastic force of the support spring, the sliding ring slides and resets along the fixed rod, and the slider gradually abuts the sealing plate under the drive of the sliding ring, so that the sealing plate gradually blocks the diversion hole, which helps to ensure the stability of the coolant flow in the liquid inlet hole, thereby helping to improve the uniformity of the coolant flowing from the liquid inlet hole into multiple diversion channels.

[0020] In a specific feasible implementation scheme, a placement inner shell is provided on the inner wall of the gun body outer shell, and a placement cavity is formed between the placement inner shell and the gun body outer shell, and the placement cavity is used to place and install the circuit board, and a sealing member for sealing the placement cavity is provided in the placement cavity; a fixing buckle is provided on the charging gun head, and a fixing slot for the fixing buckle to be engaged is provided on the gun body outer shell.

[0021] By adopting the above technical solution, when installing the circuit board, the operator places the circuit board into the placement cavity and uses the seal to seal the opening of the placement inner shell, thereby completing the installation of the circuit board, which helps to improve the convenience of the operating steps during the installation of the circuit board, thereby improving the installation efficiency of the circuit board.

[0022] In a specific embodiment, the outer sleeve of the sealing member is provided with a limiting sleeve, the limiting sleeve abuts against the inner wall of the inner shell, the limiting sleeve is provided with a snap buckle, and the outer shell of the gun body is provided with a snap groove for the snap buckle to be engaged;

[0023] The gun body shell is provided with a mounting port, and the gun body shell is also provided with a pressing spring for pressing the touch switch on the circuit board. The pressing spring is located in the mounting port and one end of the pressing spring is connected to the shell, and the other end of the pressing spring is a free end. A sealing groove is provided on the gun body shell, and the mounting port is located in the sealing groove. A packaging patch for sealing the mounting port is provided in the sealing groove.

[0024] By adopting the above technical solution, the engagement between the snap buckle and the snap groove helps to limit the position of the limit sleeve and the seal, thereby helping to improve the sealing effect of the seal on the inner shell. The pressing spring helps facilitate the user's pressing of the touch switch and helps to improve the accuracy of the user's pressing position of the touch switch. The packaging patch helps to block the installation port, thereby preventing external water from entering the inner shell through the installation port, further improving the sealing effect of the inner shell.

[0025] In a specific possible implementation scheme, the liquid inlet pipe and the cooling pipe are jointly sheathed with a cluster sleeve on their circumferential periphery, and a locking sleeve is provided at the end of the gun body shell away from the charging gun head, and the locking sleeve includes an insert ring and a tail cap, the insert ring is clamped with the gun body shell, the tail cap is connected to the insert ring and is located outside the gun body shell, a placement opening is provided through the insert ring, an elastic connecting plate is provided in the placement opening, and one end of the elastic connecting plate is connected to the insert ring, and the other end of the elastic connecting plate is a movable end, and the movable end of the elastic connecting plate is provided with an abutment block and a protrusion, and the abutment block is located on the side of the elastic connecting plate facing the cluster sleeve, and the protrusion is located on the side of the elastic connecting plate facing away from the cluster sleeve.

[0026] By adopting the above technical solution, when the insert ring with the cluster sleeve inserted inside is inserted into the gun body shell, the inner wall of the gun body shell and the cluster sleeve are jointly acted upon, and the elastic connecting plate, the abutment block and the protrusion help to tighten and fix the cluster sleeve, thereby improving the stability of the cluster sleeve inserted into the gun body shell.

[0027] In a specific embodiment, a fitting surface is provided on the side wall of the abutment block facing away from the protrusion, and the fitting surface matches the surface shape of the cluster sleeve and is used to press against the surface of the cluster sleeve;

[0028] A slope is provided on the side wall of the abutment block facing away from the tail cap to facilitate the insertion of the insert ring into the gun body shell. The distance between the end of the slope close to the tail cap and the elastic connecting plate is greater than the distance between the end of the slope away from the tail cap and the elastic connecting plate.

[0029] By adopting this technical solution, the contact surface helps prevent damage to the cluster sleeve surface caused by the multiple abutment blocks during the process of pressing against the cluster sleeve surface, thereby helping to improve the safety of the cluster sleeve and ensure the service life of the cluster sleeve. The slope helps prevent the abutment blocks from causing obstruction during the insertion of the cluster sleeve, helping to improve the smoothness of the cluster sleeve insertion into the insert ring.

[0030] In a specific feasible implementation scheme, the movable end of the elastic connecting plate is provided with a snap-in opening, and the abutment block and the protrusion are both slidably snap-into the snap-in opening. A rotating rod is rotatably provided on the inner wall of the snap-in opening, and one end of the rotating rod is hinged to a first connecting rod, and the other end of the rotating rod is hinged to a second connecting rod. The end of the first connecting rod away from the rotating rod is connected to the protrusion, and the end of the second connecting rod away from the rotating rod is connected to the abutment block.

[0031] By adopting the above technical solution, the rotating rod, the first connecting rod and the second connecting rod help to make the abutment block and the protrusion linked to each other, thereby helping to make the abutment block move along the circumference of the insert ring, and further making the abutment block able to tightly fix the cluster sleeves with different outer diameters.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. In this application, by setting up an installation bracket, a liquid inlet pipe and a cooling pipe, the liquid inlet hole and the diversion channel inside the installation bracket help to connect one liquid inlet hole with multiple cooling channels, thereby connecting the liquid inlet pipe with multiple cooling pipes, thereby helping to ensure the cooling effect of the cables inside the charging gun while reducing the space occupied by the cooling structure inside the charging gun, thereby helping to improve the installation and use effect of the internal structure of the charging gun.

[0034] 2. In this application, a fixed column and a buffer structure are provided, and the buffer structure helps to play a buffering role when the coolant just enters the liquid inlet hole, thereby reducing the impact of the coolant.

[0035] 3. This application arranges an inner shell and a sealant, whereby the inner shell helps to facilitate placement and installation of the circuit board, and the sealant helps to seal the opening for placing the inner shell, thereby helping to improve the convenience of the operating steps during the installation of the circuit board, thereby improving the installation efficiency of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0037] FIG2 is an exploded view showing the specific structure inside the gun housing.

[0038] FIG3 is an enlarged view of point A in FIG2 .

[0039] FIG4 is a partial structural cross-sectional view showing the specific structure of the terminal assembly.

[0040] FIG5 is a partial structural cross-sectional view showing the internal structure of the mounting bracket.

[0041] FIG6 is a partial structural cross-sectional view showing the connection relationship between the liquid inlet hole and the liquid inlet pipe.

[0042] FIG7 is a partial structural cross-sectional view showing the communication relationship between the liquid inlet and the diversion channel.

[0043] FIG8 is a partial cross-sectional view showing the specific structure inside the liquid inlet hole.

[0044] FIG9 is a cross-sectional view showing the specific structure of the buffer structure.

[0045] FIG10 is a schematic diagram showing the positional relationship between the gun body outer shell and the inner shell.

[0046] FIG11 is an exploded view showing the specific structure of the gun housing.

[0047] FIG12 is an exploded view showing the specific structure of the locking sleeve.

[0048] FIG13 is a cross-sectional view showing the specific structure of the locking sleeve.

[0049] FIG. 14 is a schematic diagram of the linkage relationship between the abutment block and the projection.

[0050] Explanation of the reference numerals: 1. Gun body shell; 2. Charging gun head; 3. Mounting bracket; 4. Terminal assembly; 41. Power terminal; 42. Inlay pin; 5. Cable; 6. Cooling pipe; 7. Cooling channel; 8. Liquid inlet hole; 9. Liquid inlet pipe; 10. Diverter channel; 11. Connecting hole; 12. Mounting slot; 13. Mounting protrusion; 14. First mounting platform; 15. Second mounting platform; 16. Terminal fixing plate; 17. Fixing column; 18. Sliding ring; 19. Support spring; 20. Buffer structure; 201. Buffer plate; 202. Folding connecting plate; 21. Slide groove; 22. Slider; 23. Diverter hole; 24. Mounting groove; 25. Blocking plate ; 26. Magnet; 27. Place inner shell; 28. Place cavity; 29. ​​Seal; 30. Limit sleeve; 31. Snap buckle; 32. Snap groove; 33. Mounting port; 34. Press spring; 35. Sealing groove; 36. Package patch; 37. Cluster sleeve; 38. Locking sleeve; 381. Insert ring; 382. Tail cap; 39. Place opening; 40. Elastic connecting plate; 43. Fitting surface; 44. Slope; 45. Snap opening; 46. Rotating rod; 47. First connecting rod; 48. Second connecting rod; 49. Abutment block; 50. Bump; 51. Sealing ring groove; 52. Sealing ring; 53. Fixing buckle; 54. Fixing slot; 55. Screw. DETAILED DESCRIPTION

[0051] The present application is further described in detail below with reference to the accompanying drawings.

[0052] The present application discloses a compact liquid-cooled charging gun, which, with reference to Figures 1 and 2, includes a gun housing 1, one end of which is secured with a charging gun head 2, a securing clip 53 being fixedly mounted on the charging gun head 2, and a securing slot 54 being defined in the gun housing 1. A mounting bracket 3 is fixedly mounted within the gun housing 1, and the mounting bracket 3 is provided with at least two sets of terminal assemblies 4. In this embodiment, two sets of terminal assemblies 4 are provided.

[0053] Referring to Figures 2 and 3 , each terminal assembly 4 includes a power terminal 41 and a pin 42. Mounting protrusions 13 are integrally formed on the mounting bracket 3. A mounting slot 12 is defined around the circumference of the power terminal 41. The mounting protrusions 13 engage with the mounting slot 12. The slot 12 has a first mounting platform 14 formed on its wall, and the mounting protrusions 13 have a second mounting platform 15 formed on their wall. The first and second mounting platforms 14 and 15 mate with each other. A terminal retainer 16 is fixedly attached to the mounting bracket 3. A screw 55 is threadedly connected to the mounting bracket 3. The terminal retainer 16 abuts against the slot 12 wall. The pin 42 is inserted into the power terminal 41 and fixedly connected to the power terminal 41 via a retaining pin.

[0054] 2 and 4 , the end of the inlay pin 42 facing away from the charging gun head 2 is fixedly connected to the cable 5, and the end of the power terminal 41 facing away from the charging gun head 2 is fixedly installed with a cooling tube 6, and the cooling tube 6 is sleeved on the circumferential periphery of the cable 5. A cooling channel 7 is formed between the cable 5 and the cooling tube 6 around it. A connecting hole 11 connected to the cooling channel is opened on the power terminal 41, and the opening of the connecting hole 11 is located on the surface of the first mounting platform 14.

[0055] 2 and 3 , when installing the power terminal 41 , the mounting slot 12 is engaged with the mounting protrusion 13 , and the terminal fixing piece 16 is fixed to the mounting bracket 3 by screws 55 , so that the terminal fixing piece 16 limits the power terminal 41 , thereby improving the connection stability between the power terminal 41 and the mounting bracket 3 .

[0056] 5 and 6 , a liquid inlet hole 8 is provided inside the mounting bracket 3 , a liquid inlet pipe 9 is fixedly connected to the side wall of the mounting bracket 3 , and the liquid inlet pipe 9 is in communication with the liquid inlet hole 8 .

[0057] 3 and 5 , two diversion channels 10 are provided inside the mounting bracket 3 . Both diversion channels 10 are connected to the liquid inlet 8 . One end of the diversion channel 10 away from the liquid inlet 8 opens on the surface of the second mounting platform 15 .

[0058] Referring to Figures 2 and 5 , the second mounting platform 15 is provided with a sealing ring groove 51, located circumferentially around and connected to the shunt channel 10. A sealing ring 52 is securely positioned within the sealing ring groove 51, abutting against the first mounting platform 14. The first and second mounting platforms 14, 15 help improve the sealing between the connecting hole 11 and the shunt channel 10, thereby minimizing coolant leakage within the charging gun. The engagement of the first and second mounting platforms 14, 15 also helps limit the installation angle of the power terminal 41, thereby ensuring proper alignment between the connecting hole 11 and the shunt channel 10. The sealing ring 52 helps seal the gap between the first and second mounting platforms 14, 15, further improving the sealing between the connecting hole 11 and the shunt channel 10 and preventing coolant leakage within the charging gun.

[0059] Referring to Figures 4 and 7 , during use of the charging gun, coolant is introduced into the liquid inlet hole 8 through the liquid inlet pipe 9. After passing through the liquid inlet hole 8, the coolant enters the two diversion channels 10 and then enters the two cooling channels 7 through the connecting hole 11. As the coolant flows, it cools the cable 5. Furthermore, connecting the two cooling channels 7 with a single liquid inlet hole 8 helps to ensure cooling of the cable 5 inside the charging gun while reducing the space occupied by the cooling structure within the gun, thereby improving the installation and use of the internal structure of the charging gun.

[0060] 8 and 9 , a fixing post 17 is fixedly installed in the mounting bracket 3. The fixing post 17 is located in the liquid inlet hole 8 and is arranged along the axial direction of the liquid inlet hole 8. A sliding ring 18 is slidably sleeved on the fixing post 17. A supporting spring 19 is also sleeved on the fixing post 17. One end of the supporting spring 19 is fixedly connected to the inner wall of the mounting bracket 3, and the other end is fixedly connected to the sliding ring 18. A truncated cone-shaped buffer structure 20 is provided on the circumference of the sliding ring 18. The circumferential outer diameter of the buffer structure 20 gradually increases along the flow direction of the liquid in the liquid inlet hole 8.

[0061] 8 and 9 , the buffer structure 20 includes a buffer sheet 201 and a folding connecting sheet 202. The number of the buffer sheets 201 and the folding connecting sheet 202 is the same and is at least two. In this embodiment, the number of the buffer sheets 201 and the folding connecting sheet 202 are both six. The buffer sheets 201 and the folding connecting sheet 202 are both movably connected to the sliding ring 18. Each buffer sheet 201 is fan-shaped and has an arc-shaped outer surface. Each folding connecting sheet 202 is located between two adjacent buffer sheets 201, and the two side edges of the folding connecting sheet 202 in the width direction are respectively connected to the two buffer sheets 201.

[0062] Referring to Figures 8 and 9, two slide grooves 21 are axially provided on the outer wall of the fixed column 17, and the two slide grooves 21 are symmetrically arranged with the axis of the fixed column 17 as the center line. Two sliders 22 are integrally formed on the inner wall of the sliding ring 18, and each slider 22 is slidably installed in a slide groove 21. A diversion hole 23 is axially provided in the fixed column 17, and two mounting grooves 24 are radially provided on the hole wall of one end of the diversion hole 23 close to the sliding ring 18. The two mounting grooves 24 are symmetrically arranged with the axis of the fixed column 17 as the center line. The mounting grooves 24 are connected to the slide groove 21, and a blocking plate 25 can be movably installed in each mounting groove 24. The blocking plate 25 is located on one side of the inside of the mounting groove 24 and abuts against the slider 22. A magnet 26 is fixedly embedded in each blocking plate 25, and the two magnets 26 repel each other.

[0063] 8 and 9 , when the coolant just starts to enter the liquid inlet 8, under the impact of the coolant, the sliding ring 18 slides along the fixed column 17 toward the direction of the coolant flow, thereby driving the support spring 19 to contract, and the side of the buffer sheet 201 away from the sliding ring 18 gradually moves away from the fixed column as the sliding ring 18 moves, that is, gradually opens; at the same time, the folding connecting sheet 202 gradually changes from a folded state to an extended state during the opening of multiple buffer sheets 201, and the gap between two adjacent buffer sheets 201 is blocked, so that there is no gap on the truncated cone-shaped inclined surface formed by the multiple buffer sheets 201 and the multiple folding connecting sheets 202, which helps to buffer the coolant flowing in the liquid inlet 8 and reduce the impact effect of the coolant.

[0064] 8 and 9 , when the sliding ring 18 slides along the fixed column 17 in the direction of coolant flow, the sliding ring 18 drives the slider 22 to slide in the slide groove 21, so that the position of the slider 22 and the sealing plate 25 are staggered, so that the slider 22 no longer abuts against the sealing plate 25. At the same time, under the mutual repulsion of the two magnets 26 and the flow impact of the coolant, the sealing plate 25 as a whole gradually moves into the inside of the mounting groove 24, so that the two sealing plates 25 no longer block the diversion hole 23, so that the coolant can flow into the diversion hole 23.

[0065] 8 and 9 , after the coolant flows stably in the liquid inlet 8, the impact force on the buffer plate 201 and the folded connecting plate 202 is reduced. At the same time, under the elastic force of the support spring 19, the sliding ring 18 and the slider 22 slide along the axial direction of the fixed rod to return to the initial position, so that the slider 22 and the sealing plate 25 are pressed against each other, and then the sealing plate 25 gradually slides into the diversion hole 23 under the pressing action of the slider 22. The two sealing plates 25 block the diversion hole 23 again, which helps to ensure the stability of the coolant flow in the liquid inlet 8, thereby helping to improve the uniformity of the coolant flowing from the liquid inlet 8 into the multiple diversion channels 10.

[0066] 10 and 11 , a placement inner shell 27 is integrally formed on the inner wall of the gun body shell 1. A placement cavity 28 is formed between the placement inner shell 27 and the inner wall of the gun body shell 1. A sealing member 29 is fixedly placed in the placement cavity 28. In this embodiment, the sealing member 29 is a sealing block that has an interference fit with the cavity wall of the placement cavity 28. A limiting sleeve 30 is sleeved on the periphery of the sealing block, which abuts against the inner wall of the placement inner shell 27. A snap-fit ​​buckle 31 is fixedly mounted on the limiting sleeve 30, and a snap-fit ​​groove 32 is formed through the gun body shell 1.

[0067] 10 and 11 , when installing a circuit board, the operator places the circuit board into the placement cavity 28 and then places the sealing block into the placement cavity 28 to seal the opening of the placement inner shell 27 , thereby completing the installation of the circuit board. This helps to improve the convenience of the operation steps during the circuit board installation process, thereby improving the installation efficiency of the circuit board. During the process of placing the sealing block and the limiting sleeve 30 into the placement cavity 28 , the snap buckle 31 engages with the snap groove 32 , helping to limit the position of the limiting sleeve 30 and the sealing block, improving the stability of the sealing block's placement position in the placement cavity 28, and thus helping to improve the sealing effect of the sealing block on the placement inner shell 27 .

[0068] Referring to Figures 10 and 11, a mounting opening 33 is formed through the gun body housing 1. A pressing spring 34 is fixedly mounted on the gun body housing 1. The pressing spring 34 is located within the mounting opening 33, with one end of the pressing spring 34 connected to the housing and the other end of the pressing spring 34 being free. The free end of the pressing spring 34 is located directly above the touch switch on the circuit board. A sealing groove 35 is formed on the outer surface of the gun body housing 1. The mounting opening 33 is located within the sealing groove 35. A packaging patch 36 is fixedly mounted within the sealing groove 35. During use of the charging gun, the pressing spring 34 facilitates the user's pressing of the touch switch and helps improve the user's accuracy in determining the position of the touch switch on the circuit board. The packaging patch 36 helps to seal the mounting opening 33, thereby preventing external water from entering the inner housing 27 through the mounting opening 33, further improving the sealing effect of the inner housing 27.

[0069] 1 , the liquid inlet pipe 9 and the cooling pipe 6 are both sleeved with a cluster sleeve 37 on their circumferential peripheries.

[0070] 12 and 13 , a locking sleeve 38 is provided at the end of the gun body shell 1. The locking sleeve 38 includes an insert ring 381 and a tail cap 382. The insert ring 381 is inserted into the inside of the gun body shell 1. The tail cap 382 is integrally formed with the insert ring 381 and is located outside the gun body shell 1. A plurality of placement openings 39 are opened through the insert ring 381. A plurality of elastic connecting plates 40 are fixedly installed on the circumference of the insert ring 381. The elastic connecting plates 40 are located in the placement openings 39. One end of the elastic connecting plate 40 is fixedly connected to the insert ring 381, and the other end of the elastic connecting plate 40 is a movable end.

[0071] 13 and 14 , a snap-fit ​​opening 45 is defined at the movable end of the elastic connecting plate 40. An abutment block 49 and a projection 50 are movably snap-fitted into the snap-fit ​​opening 45. The abutment block 49 is located on the side of the elastic connecting plate 40 facing the clustering sleeve 37, while the projection 50 is located on the side of the elastic connecting plate 40 facing away from the clustering sleeve 37. A rotating rod 46 is rotatably mounted on the inner wall of the snap-fit ​​opening 45. A first connecting rod 47 is hingedly connected to one end of the rotating rod 46, and a second connecting rod 48 is hingedly connected to the other end of the rotating rod 46. The end of the first connecting rod 47 away from the rotating rod 46 is fixedly connected to the projection 50, while the end of the second connecting rod 48 away from the rotating rod 46 is fixedly connected to the abutment block 49.

[0072] 13 , the sidewall of the abutment block 49 facing away from the protrusion 50 has a contact surface 43 that contacts the surface of the cluster sleeve 37. The sidewall of the abutment block 49 facing away from the tail cap 382 has a slope 44. The distance between the end of the slope 44 closer to the tail cap 382 and the elastic connecting plate 40 is greater than the distance between the end of the slope 44 farther from the tail cap 382 and the elastic connecting plate 40.

[0073] Referring to Figures 12 and 13, when the cluster sleeve 37 is inserted into the insert ring 381, the slope 44 prevents the abutment blocks 49 from obstructing the insertion of the cluster sleeve 37 during the insertion process, thereby improving the smoothness of the insertion of the cluster sleeve 37 into the insert ring. The multiple abutment blocks 49 are tightly pressed against the outer surface of the cluster sleeve 37, causing the movable ends of the multiple elastic connecting plates 40 to deflect away from the cluster sleeve 37, thereby driving the protrusions 50 to move toward the periphery of the insert ring, so that the ends of the protrusions 50 away from the elastic connecting plates 40 are higher than the outer wall of the insert ring 381.

[0074] 12 and 13 , after the cluster sleeve 37 is inserted, the insert ring 381 is gradually inserted into the gun body shell 1, so that the multiple protrusions 50 higher than the outer wall of the insert ring 381 drive the multiple abutment blocks 49 to move toward the inside of the insert ring 381 under the extrusion force of the inner wall of the gun body shell 1, so that the abutment blocks 49 press against the surface of the cluster sleeve 37, and at the same time help to firmly insert the insert ring 381 into the gun body shell 1, thereby improving the stability of the cluster sleeve 37 inserted into the gun body shell 1. The provision of the fitting surface 43 on the abutment block 49 helps to prevent the multiple abutment blocks 49 from damaging the surface of the cluster sleeve 37 during the process of pressing against the surface of the cluster sleeve 37, thereby helping to improve the safety of the cluster sleeve 37 and ensure the service life of the cluster sleeve 37.

[0075] 13 and 14 , in the process of inserting the insert ring 381 into the gun body shell 1, the protrusion 50 is acted upon by the inner wall of the gun body shell 1, causing the protrusion 50 to move along the snap-fit ​​opening 45 in a direction opposite to the insertion direction. At the same time, under the transmission action of the first connecting rod 47, the rotating rod 46 and the second connecting rod 48, the abutment block 49 can be driven to move in a direction opposite to the protrusion 50, so that the multiple abutment blocks 49 can tightly fix the cluster sleeves 37 with different outer diameters.

[0076] The working principle of the embodiment of this application is as follows: During use of the charging gun, coolant is introduced into the liquid inlet hole 8 through the liquid inlet pipe 9. After passing through the liquid inlet hole 8, the coolant enters the two diversion channels 10 and then enters the two cooling channels 7 through the connecting hole 11, thereby allowing the coolant to cool the cable 5 during its flow. Furthermore, the use of a single liquid inlet hole 8 to connect the two cooling channels 7 helps to ensure the cooling of the cable 5 inside the charging gun while reducing the space occupied by the cooling structure inside the charging gun, thereby improving the installation and use of the internal structure of the charging gun.

[0077] When the coolant just starts to enter the liquid inlet hole 8, under the impact of the coolant, the sliding ring 18 slides along the fixed column 17 toward the direction of coolant flow, thereby driving the support spring 19 to contract, causing the buffer plate 201 and the folded connecting plate 202 to gradually open, thereby buffering the coolant flowing in the liquid inlet hole 8 and reducing the impact effect of the coolant.

[0078] When the sliding ring 18 slides along the fixed column 17 toward the direction of coolant flow, the sliding ring 18 drives the slider 22 to slide in the slide groove 21, so that the position of the slider 22 and the sealing plate 25 are staggered, so that the slider 22 no longer abuts against the sealing plate 25. At the same time, under the mutual repulsion of the two magnets 26 and the flow impact of the coolant, the sealing plate 25 as a whole gradually moves into the mounting groove 24, so that the two sealing plates 25 no longer block the diversion hole 23, so that the coolant can flow into the diversion hole 23.

[0079] When the coolant flows stably in the liquid inlet 8, the impact force on the buffer plate 201 and the folded connecting plate 202 is reduced. At the same time, under the elastic force of the support spring 19, the sliding ring 18 and the slider 22 slide along the axial direction of the fixed rod to return to the initial position, so that the slider 22 and the sealing plate 25 are pressed against each other, and then the sealing plate 25 gradually slides into the diversion hole 23 under the pressing action of the slider 22. The two sealing plates 25 block the diversion hole 23 again, which helps to ensure the stability of the coolant flow in the liquid inlet 8, thereby helping to improve the uniformity of the coolant flowing from the liquid inlet 8 into the multiple diversion channels 10.

[0080] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A compact liquid-cooled charging gun, characterized by: The invention comprises a gun body shell (1), one end of the gun body shell (1) is connected to a charging gun head (2), a mounting bracket (3) is provided in the gun body shell (1), a terminal assembly (4) and at least two cables (5) connected to the terminal assembly (4) are provided on the mounting bracket (3), a cooling pipe (6) is provided on the circumferential periphery of each of the cables (5), and a cooling channel (7) is formed between the cable (5) and the cooling pipe (6) on its periphery. A liquid inlet hole (8) is provided on the mounting bracket (3), a liquid inlet pipe (9) is connected to the mounting bracket (3), the liquid inlet pipe (9) is communicated with the liquid inlet hole (8), a shunt channel (10) communicated with the liquid inlet hole (8) is provided in the mounting bracket (3), the number of the shunt channels (10) is the same as the number of the cooling channels (7), and one end of each shunt channel (10) away from the liquid inlet hole (8) is communicated with one of the cooling channels (7).

2. The compact liquid-cooled charging gun according to claim 1, characterized in that: The terminal assembly (4) includes a power terminal (41) and an insert pin (42), wherein the insert pin (42) is arranged inside the power terminal (41), and the cable (5) is connected to the end of the insert pin (42), one end of the cooling tube (6) is connected to the end of the power terminal (41), and a connecting hole (11) connected to the cooling channel (7) is provided on the power terminal (41), and the connecting hole (11) is connected to an opening of the diversion channel (10) at one end away from the liquid inlet hole (8).

3. The compact liquid-cooled charging gun according to claim 2, characterized in that: The power terminal (41) is provided with a mounting slot (12), the mounting bracket (3) is provided with a mounting protrusion (13) for engaging with the mounting slot (12), a first mounting platform (14) is provided on the groove wall of the mounting slot (12), the opening of the connecting hole (11) is located on the first mounting platform (14), the mounting protrusion (13) is provided with a second mounting platform (15) for affixing to the first mounting platform (14), the opening of the diversion channel (10) is located on the second mounting platform (15), and the mounting bracket (3) is provided with a mounting protrusion for engaging the power terminal (41) with the mounting slot (12). The terminal (41) is fixed to a terminal fixing piece (16) on the mounting bracket (3); a screw (55) for locking the terminal fixing piece (16) is further provided on the mounting bracket (3); the terminal fixing piece (16) abuts against the groove wall of the mounting slot (12); a sealing ring groove (51) is provided on the second mounting platform (15); the sealing ring groove (51) is located on the circumferential periphery of the diversion channel (10) and is connected to the diversion channel (10); the sealing ring groove (51) is provided with a sealing ring (52); the sealing ring (52) abuts against the first mounting platform (14).

4. The compact liquid-cooled charging gun according to claim 1, characterized in that: A fixed column (17) is provided in the liquid inlet hole (8), and the fixed column (17) is provided along the axial direction of the liquid inlet hole (8) and is connected to the mounting bracket (3). A sliding ring (18) is slidably provided on the fixed column (17), and a supporting spring (19) is sleeved on the fixed column (17). One end of the supporting spring (19) is connected to the sliding ring (18), and the other end is connected to the mounting bracket (3). A truncated cone-shaped buffer structure (20) is provided on the circumference of the sliding ring (18). The circumferential outer diameter of the buffer structure (20) gradually increases along the flow direction of the liquid in the liquid inlet hole (8). The sliding of the sliding ring (18) can change the shape of the buffer structure (20), thereby changing the buffering effect of the buffer structure (20) on the liquid flowing in the liquid inlet hole (8); The buffer structure (20) comprises a buffer sheet (201) and a folding connecting sheet (202); the number of the buffer sheet (201) and the folding connecting sheet (202) is the same and at least two; the buffer sheet (201) and the folding connecting sheet (202) are both connected to the sliding ring (18); the buffer sheet (201) is arranged in a fan shape; the folding connecting sheet (202) can be folded and arranged between two adjacent buffer sheets (201); the folding connecting sheet (202) is connected to the adjacent buffer sheets (201) and is used to seal the gap between the two adjacent buffer sheets (201).

5. The compact liquid-cooled charging gun according to claim 4, characterized in that: A sliding groove (21) is axially provided on the outer wall of the fixed column (17), a slider (22) for sliding in the sliding groove (21) is provided on the sliding ring (18), a bypass hole (23) is axially provided on the fixed column (17), a plurality of mounting grooves (24) for communicating with the sliding groove (21) are provided on the hole wall at one end of the bypass hole (23), and a blocking plate (25) for blocking the bypass hole (23) is movably provided in each of the mounting grooves (24), the blocking plate (25) is in contact with the slider (22), and a magnet (26) is provided on each of the blocking plates (25), and the plurality of magnets (26) repel each other.

6. The compact liquid-cooled charging gun according to claim 1, characterized in that: A placement inner shell (27) is provided on the inner wall of the gun body shell (1), a placement cavity (28) is formed between the placement inner shell (27) and the gun body shell (1), the placement cavity (28) is used to place and install a circuit board, and a sealing member (29) is provided in the placement cavity (28) for sealing the placement cavity (28); a fixing buckle (53) is provided on the charging gun head (2), and a fixing slot (54) for the fixing buckle (53) to be engaged is provided on the gun body shell (1).

7. The compact liquid-cooled charging gun according to claim 6, characterized in that: The outer sleeve of the sealing member (29) is provided with a limiting sleeve (30), the limiting sleeve (30) is in contact with the inner wall of the inner shell (27), the limiting sleeve (30) is provided with a snap-fit ​​buckle (31), and the gun body outer shell (1) is provided with a snap-fit ​​groove (32) for snapping the snap-fit ​​buckle (31); The gun body shell (1) is provided with a mounting opening (33), and the gun body shell (1) is also provided with a pressing spring (34) for pressing a touch switch on a circuit board, the pressing spring (34) is located in the mounting opening (33), and one end of the pressing spring (34) is connected to the shell, and the other end of the pressing spring (34) is a free end. The gun body shell (1) is provided with a sealing groove (35), the mounting opening (33) is located in the sealing groove (35), and a packaging patch (36) for sealing the mounting opening (33) is provided in the sealing groove (35).

8. The compact liquid-cooled charging gun according to claim 1, characterized in that: The liquid inlet pipe (9) and the cooling pipe (6) are jointly sheathed with a cluster sleeve (37) on their circumferential peripheries. A locking sleeve (38) is provided at one end of the gun body shell (1) away from the charging gun head (2). The locking sleeve (38) includes an insert ring (381) and a tail cap (382). The insert ring (381) is snap-fitted to the gun body shell (1). The tail cap (382) is connected to the insert ring (381) and is located outside the gun body shell (1). A placement opening (39) is provided through the insert ring (381). An elastic connecting plate (40) is provided in the placement opening (39), and one end of the elastic connecting plate (40) is connected to the insert ring (381), and the other end of the elastic connecting plate (40) is a movable end. The movable end of the elastic connecting plate (40) is provided with an abutment block (49) and a protrusion (50), and the abutment block (49) is located on the side of the elastic connecting plate (40) facing the cluster sleeve (37), and the protrusion (50) is located on the side of the elastic connecting plate (40) facing away from the cluster sleeve (37).

9. The compact liquid-cooled charging gun according to claim 8, characterized in that: A fitting surface (43) is provided on the side wall of the abutment block (49) facing away from the protrusion (50), and the fitting surface (43) matches the surface shape of the cluster sleeve (37) and is used to press against the surface of the cluster sleeve (37); A slope (44) is provided on the side wall of the abutment block (49) facing away from the tail cap (382) for facilitating the insertion of the inserting ring (381) into the gun body housing (1), and the distance between the end of the slope (44) close to the tail cap (382) and the elastic connecting plate (40) is greater than the distance between the end of the slope (44) away from the tail cap (382) and the elastic connecting plate (40).

10. The compact liquid-cooled charging gun according to claim 8, characterized in that: The movable end of the elastic connecting plate (40) is provided with a clamping opening (45), the abutting block (49) and the protrusion (50) are both slidably clamped in the clamping opening (45), and a rotating rod (46) is rotatably provided on the inner wall of the clamping opening (45), one end of the rotating rod (46) is hinged to a first connecting rod (47), and the other end of the rotating rod (46) is hinged to a second connecting rod (48), the end of the first connecting rod (47) away from the rotating rod (46) is connected to the protrusion (50), and the end of the second connecting rod (48) away from the rotating rod (46) is connected to the abutting block (49).

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