Charging gun

Abstract

The utility model provides a charging gun, and the charging gun comprises a main body, a connection assembly, and a first terminal. The main body comprises a gun body and a gun head which are mutually covered, the gun body is provided with a containing cavity, and the gun head partially extends into and blocks the containing cavity; the connecting assembly comprises a fixing seat and a connecting piece arranged on the fixing seat, the fixing seat is arranged in the containing cavity, a fixing hole communicated with the containing cavity is formed in the fixing seat, the connecting piece comprises a sealing part and an inserting part which are sequentially and integrally arranged, and the sealing part extends into the fixing hole and is in sealed connection with the fixing hole; the first terminal is inserted into the insertion part and is electrically connected with the sealing part, and one end, deviating from the insertion part, of the first terminal extends into the gun head. According to the charging gun, the connecting piece is divided into the inserting part and the sealing part, and the sealing performance of the interior of the gun body is ensured through the design of the sealing part. The plugging design between the plugging part and the terminal not only simplifies the replacement process of the terminal, but also can effectively prevent external water vapor and dust from seeping into the gun body through the signal terminal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging guns, in particular to a charging gun. BACKGROUND

[0002] With the rapid growth of the electric vehicle (EV) market, the construction of charging infrastructure is also advancing. The charging gun, as a crucial device in the charging process of electric vehicles, directly affects the charging efficiency and safety. The charging gun is usually composed of a gun body, a gun head, a connection terminal, etc. The terminal of the gun head is electrically connected with the charging interface of the electric vehicle, so the terminal is required to have good contact performance, durability, and easy replacement and maintenance characteristics.

[0003] At present, the design of the charging gun is mostly integrated and inseparable. In public places, as the frequency of use increases, the gun head part is often worn and damaged. The gun head part is damaged easily, which can cause the normal plugging of the charging gun, and in severe cases, it can damage the charging terminal. Especially in the case of high-current charging, damage to the terminal part can cause poor contact, heating, and other problems, affecting the charging effect and service life. Therefore, the design of the charging gun needs to meet higher safety, reliability, and maintainability requirements. In order to solve the problem of wear and damage of the front end of the charging gun, some existing charging guns adopt a detachable design, especially in the gun head part, a split design is adopted, so that the gun head and the gun body can be disassembled and replaced through screws, buckles, etc. to avoid the scrapping of the whole charging gun.

[0004] Although the existing detachable charging gun design designs the gun head and the gun body as a detachable design, and also designs the charging terminal as a detachable part, it solves the common problem of gun head damage in use, but there are still certain limitations in the disassembly of the charging terminal. Because the signal terminal is relatively sensitive to external interference, after the signal terminal is disassembled, the sealing performance of the terminal and the gun body is weakened, external moisture enters from the signal terminal, causing charging failure or abnormality. Therefore, in the existing design, only the charging head and the charging terminal part can be disassembled and replaced. In the case of damage to other terminals, the existing design of the charging gun cannot disassemble and replace the damaged signal terminal. Therefore, there is an urgent need for a charging gun that can replace each terminal of the charging gun and also maintain good sealing performance to solve the above problems. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide a charging gun that can replace each terminal of the charging gun and also maintain good sealing performance to solve the above problems.

[0006] Embodiments of the present application provide a charging gun, comprising:

[0007] The body comprises a gun body and a gun head which are covered with each other, the gun body is provided with a containing cavity, and the gun head partially extends into and blocks the containing cavity;

[0008] The connecting assembly comprises a fixing seat and a connecting piece arranged on the fixing seat, the fixing seat is arranged in the containing cavity, the fixing seat is provided with a fixing hole which is communicated with the containing cavity, the connecting piece comprises a sealing part and a plug-in part which are arranged integrally in sequence, the sealing part extends into the fixing hole and is in sealing connection with the fixing hole;

[0009] The first terminal is plugged into the plug-in part and is in electrical connection with the sealing part, one end of the first terminal which is away from the plug-in part extends into the gun head and is in sealing connection with the gun head.

[0010] In at least one embodiment of the present application, the charging gun comprises a first sealing piece and a second sealing piece arranged between the gun body and the gun head;

[0011] One end of the gun head which is close to the gun body is recessed inward to form a first step surface, the first step surface is arranged around the butt joint end of the gun head and extends into the containing cavity, one end of the first sealing piece is annularly abutted on the step surface, and the other end is in interference fit with the inner wall of the gun body;

[0012] The gun head is provided with a plug-in hole, the first terminal extends into the plug-in hole, one end of the second sealing piece is abutted on the inner wall of the plug-in hole, and the other end is in interference fit with the outer wall of the connecting piece.

[0013] In at least one embodiment of the present application, one end of the plug-in hole which is close to the connecting piece is recessed inward to form a second step surface, and the second sealing piece is abutted on the second step surface;

[0014] The charging gun comprises a first sealing ring, the first sealing ring is sleeved on the outer wall of the first terminal and is abutted on the inner wall of the plug-in hole.

[0015] In at least one embodiment of the present application, the charging gun further comprises a second sealing ring, the second sealing ring is sleeved on the outer wall of the connecting piece and is abutted on the inner wall of the fixing hole.

[0016] In at least one embodiment of the present application, the connecting assembly further comprises a fixing block which is fixedly connected with the fixing seat, the fixing block extends into the fixing hole and is abutted on the sealing part, and the fixing block is attached to the inner wall of the fixing seat to fix the connecting piece;

[0017] The side wall of the fixing seat and the fixing block enclose a glue injection cavity, and the glue injection cavity is filled with glue to seal the fixing hole.

[0018] In at least one embodiment of the present application, the charging gun further comprises a sealing sleeve sleeved on the circumferential surface of the fixed seat, the sealing sleeve separates the accommodating cavity into a first cavity and a second cavity, the connecting assembly is arranged in the first cavity, and the sealing sleeve is used for isolating external water vapor from entering the connecting assembly.

[0019] In at least one embodiment of the present application, the plug-in part is provided with a counterbore, the connecting assembly further comprises an elastic snap ring abutting the inner wall of the counterbore, the plug-in end of the first terminal has a plug-in surface, the elastic snap ring has an elastic abutting surface, the elastic abutting surface abuts the plug-in surface to fix the first terminal.

[0020] In at least one embodiment of the present application, the elastic snap ring comprises a fixed part and an elastic part arranged integrally, the fixed part is arranged at opposite ends of the elastic part;

[0021] The fixed part abuts the inner wall of the counterbore, the elastic part abuts the first terminal, and the maximum inner diameter of the elastic part is less than or equal to the minimum inner diameter of the fixed part in the axial direction of the elastic snap ring.

[0022] In at least one embodiment of the present application, the connecting piece further comprises a limiting part arranged at one end of the plug-in part away from the sealing part, and the limiting part is used for limiting the movement of the elastic snap ring.

[0023] In at least one embodiment of the present application, the charging gun further comprises a second terminal fixedly connected with the connecting piece, and the second terminal abuts the connecting piece.

[0024] The charging gun further comprises a fixing piece, the second terminal is provided with a through hole, the fixing piece extends into the through hole and abuts the second terminal to be fixedly connected with the connecting piece, and the charging gun further comprises a sealing gasket arranged between the fixing piece and the second terminal and used for sealing the through hole.

[0025] The charging gun provided in the above can effectively solve the problem that some terminals cannot be detached in the existing charging gun. Users can replace the terminals as needed, avoiding the high cost of repair or replacement when the entire charging gun is damaged. The connector is divided into a plug-in part and a sealing part, and the sealing performance of the gun body is ensured through the design of the sealing part. The plug-in design between the plug-in part and the terminal not only simplifies the replacement process of the terminal, but also effectively prevents external water vapor and dust from entering the gun body through the signal terminal. The sealing between the terminal and the gun head further enhances the waterproof performance of the charging gun. Whether it is the terminal of the gun head or the part connected to the gun body, the sealing design effectively prevents the entry of water vapor, thereby avoiding electrical failure or charging abnormalities caused by water vapor. This multiple waterproof structure greatly improves the reliability of the charging gun. The design of the application not only makes the terminal detachable, but also ensures that the sealing performance after detachment is not affected. This innovation improves the convenience of users in the maintenance and operation of the charging gun. Users do not need to worry about the decline in sealing performance or other potential problems when replacing the terminal, ensuring that the charging gun can maintain its efficient and safe performance after replacing the terminal. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a perspective view of a charging gun in an embodiment of the present application.

[0027] Figure 2 It is Figure 1 It is a perspective view of a charging gun.

[0028] Figure 3 It is Figure 2 It is an enlarged view of A of the charging gun.

[0029] Figure 4 It is Figure 1 It is a first terminal cross-sectional enlarged view of the charging gun.

[0030] Figure 5 It is Figure 1 It is a split cross-sectional view of the charging head and the connecting assembly of the charging gun.

[0031] Figure 6 It is Figure 1 It is a perspective split cross-sectional view of the charging head and the connecting assembly of the charging gun.

[0032] Figure 7 It is Figure 1 It is a perspective view of the fixing seat and the fixing block of the charging gun.

[0033] Figure 8 It is Figure 1 It is a second terminal cross-sectional enlarged view of the charging gun.

[0034] Figure 9 Fig. 8 is an exploded view of the charging gun according to the present application. Figure 1 Fig. 9 is a perspective view of the charging gun according to the present application.

[0035] Figure 10 Fig. 10 is an exploded view of the charging gun according to the present application. Figure 1 Fig. 11 is a perspective view of the charging gun according to the present application.

[0036] Main element symbol explanation

[0037] 100. A charging gun; 10. a main body; 11. a gun body; 12. a gun head; 121. a containing cavity; 121a. a first cavity; 121b. a second cavity; 122. a first step surface; 123. a plug-in hole; 123a. a second step surface; 13. a first sealing element; 14. a second sealing element; 15. a first sealing ring; 16. a second sealing ring; 20. a connecting assembly; 21. a fixing seat; 211. a fixing hole; 22. a connecting element; 221. a sealing part; 222. a plug-in part; 222a. a counterbore; 223. a limiting part; 23. a fixing block; 24. a glue injection cavity; 25. an elastic clasp; 251. an elastic abutting surface; 252. a fixing part; 253. an elastic part; 30. a first terminal; 31. a plug-in surface; 40. a sealing sleeve; 50. a second terminal; 60. a fixing element; 70. a sealing gasket. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0039] It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component or a middle component can exist at the same time. When one component is considered to be "provided on" another component, it can be directly provided on the other component or a middle component can exist at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and the like used herein are for illustrative purposes only.

[0040] The embodiments of the present application provide a charging gun, comprising:

[0041] A main body comprising a gun body and a gun head which are covered with each other, the gun body being provided with a containing cavity, and the gun head being partially inserted into and blocked in the containing cavity;

[0042] A connecting assembly comprising a fixing seat and a connecting element provided on the fixing seat, the fixing seat being provided in the containing cavity, the fixing seat being provided with a fixing hole which is communicated with the containing cavity, and the connecting element comprising a sealing part and a plug-in part which are integrally provided in sequence, the sealing part being inserted into the fixing hole and being in sealing connection with the fixing hole;

[0043] The first terminal is inserted into the insertion part and electrically connected with the sealing part, one end of the first terminal away from the insertion part extends into the gun head and is sealingly connected with the gun head.

[0044] The charging gun provided by the application effectively solves the problem that some terminals cannot be detached in the existing charging gun. Users can replace the terminals as needed, avoiding the high cost of repair or replacement when the entire charging gun is damaged. The connector is divided into an insertion part and a sealing part, and the sealing part is designed to ensure the sealing performance of the gun body. The plug-in design between the insertion part and the terminal not only simplifies the replacement process of the terminal, but also effectively prevents external moisture and dust from entering the gun body through the signal terminal. The sealing arrangement between the terminal and the gun head further enhances the waterproof performance of the charging gun. Whether it is the gun head terminal or the part connected with the gun body, the sealing design effectively prevents the entry of moisture, thereby avoiding electrical failure or abnormal charging caused by moisture. This multiple waterproof structure greatly improves the reliability of the charging gun. The design of the application not only makes the terminal detachable, but also ensures that the sealing performance after detachment is not affected, which improves the convenience of users in the maintenance and operation of the charging gun. Users do not need to worry about the decrease in sealing performance or other potential problems when replacing the terminal, ensuring that the charging gun can maintain its efficient and safe performance after replacing the terminal.

[0045] Some embodiments of the application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0046] Please refer to Figures 1-2 The embodiment of the application provides a charging gun 100, which comprises a main body 10, a connecting assembly 20 and a first terminal 30.

[0047] The main body 10 comprises a gun body 11 and a gun head 12 which are covered with each other, the gun body 11 is provided with a receiving cavity 121, and the gun head 12 partially extends into and blocks the receiving cavity 121.

[0048] The connecting assembly 20 comprises a fixing seat 21 and a connecting piece 22 arranged on the fixing seat 21, the fixing seat 21 is arranged in the receiving cavity 121, the fixing seat 21 is provided with a fixing hole 211 which is communicated with the receiving cavity 121, and the connecting piece 22 comprises a sealing part 221 and an insertion part 222 which are arranged in sequence and integrally, the sealing part 221 extends into the fixing hole 211 and is sealingly connected with the fixing hole 211.

[0049] The first terminal 30 is inserted into the insertion part 222 and electrically connected with the sealing part 221, one end of the first terminal 30 away from the insertion part 222 extends into the gun head 12 and is sealingly connected with the gun head 12.

[0050] Specifically, the detachable design of the gun body 11 and the gun head 12 provides a modular structure of the charging gun, facilitating maintenance and replacement of parts. In terms of structure, the gun body 11 is provided with a receiving cavity 121, and the gun head 12 part can extend into and block the cavity, ensuring the integrity and safety of the charging gun. The design in the receiving cavity 121 provides the necessary space for the installation and removal of the connecting assembly 20 and the terminal, facilitating the connection and replacement of the terminal and the sealing assembly. The close-fitting design of the receiving cavity 121 and the gun head 12 helps to prevent external moisture, dust and other impurities from entering, ensuring that the charging gun maintains good waterproof performance during use.

[0051] Further, the fixing seat 21 provides a stable support point for the connecting assembly 20, ensuring that the connecting piece 22 can be firmly installed on the main body 10 of the charging gun. The fixing seat 21 is usually matched with the fixing hole 211 in the receiving cavity 121, which plays a role in positioning the connecting piece 22 and the terminal (such as DC terminal, signal terminal, etc.), thereby ensuring accurate connection of the terminal. The sealing part 221 and the plug-in part 222 are integrally arranged, the design of the sealing part 221 ensures good sealing between the connecting piece 22 and the gun body 11, preventing external moisture from entering and affecting the internal electrical components; the tail end of the sealing part 221 is electrically connected with the cable inside the gun body 11, and the plug-in part 222 ensures the electrical connection of the terminal, providing stable current transmission and ensuring the normal function of the charging gun.

[0052] In a specific embodiment, the first terminal 30 is a signal terminal or a ground terminal, or both are the first terminal 30, and the first terminal 30 is at least one.

[0053] Further, the design not only provides the plug-in part 222 required for electrical connection, but also realizes the waterproof function through the sealing part 221, avoiding damage to the internal electrical system of the charging gun by the external environment. The plug-in effect of the terminal is realized without affecting the sealing effect inside the gun body 11, and the one end of the first terminal 30 is sealingly connected with the gun head 12, which not only provides electrical connection, but also ensures the sealing of the charging gun head 12, preventing external moisture, dust, etc. from entering the gun head 12, improving the applicability of the charging gun in humid or dusty environments.

[0054] In a specific embodiment, the charging gun comprises a first sealing member 13 and a second sealing member 14 arranged between the gun body 11 and the gun head 12;

[0055] The end of the gun head 12 close to the gun body 11 is recessed inward to form a first stepped surface 122, the first stepped surface 122 is annularly arranged at the butt joint end of the gun head 12 and extends into the receiving cavity 121, one end of the first sealing member 13 annularly abuts on the stepped surface, and the other end is in interference fit with the inner wall of the gun body 11.

[0056] The gun head 12 is provided with a plug-in hole 123, the first terminal 30 extends into the plug-in hole 123, and one end of the second sealing member 14 abuts against the inner wall of the plug-in hole 123 and the other end is in interference fit with the outer wall of the connecting member 22.

[0057] Specifically, the first sealing member 13 is annularly abutted against the first stepped surface 122 and the other end is in interference fit with the inner wall of the gun body 11. The first stepped surface 122 is located at one end of the gun head 12 close to the gun body 11 and is concave to form a stepped shape. The first sealing member 13 forms a seal with the gun body 11 on the stepped surface, which can effectively prevent water vapor, dust and the like from entering the inside of the charging gun. The second sealing member 14 is located in the plug-in hole 123 of the gun head 12, one end of which abuts against the inner wall of the plug-in hole 123 and the other end is in interference fit with the outer wall of the connecting member 22. The second sealing member 14 mainly forms a seal in the contact area of the terminal insertion hole, preventing water vapor from entering from the plug-in hole 123 and protecting the internal electrical components.

[0058] Further, when the gun head 12 and the gun body 11 of the charging gun are connected by closure, the first sealing member 13 and the second sealing member 14 simultaneously function to form double seals between the gun body 11 and the gun head 12, respectively. The first sealing member 13 ensures the seal of the whole connection part of the charging gun by being in contact with the stepped surface and in interference fit with the inner wall of the gun body 11, preventing water vapor from entering the inside from the connection part of the gun head 12 and the gun body 11. The second sealing member 14 prevents water vapor from entering the inside of the gun head 12 from the plug-in hole 123 by being in interference fit with the inner wall of the plug-in hole 123 and the outer wall of the connecting member 22, protecting the safety of the internal electrical components and the terminal.

[0059] In a specific embodiment, the plug-in hole 123 is concave inward to form a second stepped surface 123a at one end close to the connecting member 22, and the second sealing member 14 is abutted against the second stepped surface 123a.

[0060] The charging gun comprises a first sealing ring 15, which is sleeved with the outer wall of the first terminal 30 and abuts against the inner wall of the plug-in hole 123.

[0061] Specifically, the plug-in hole 123 is concave inward to form a second stepped surface 123a at one end close to the connecting member 22, which is to provide an accurate installation position for the second sealing member 14. This design enables the second sealing member 14 to closely fit the stepped surface, thereby providing effective sealing effect. The second sealing member 14 is in contact with the second stepped surface 123a to form a second waterproof barrier, preventing water vapor or impurities from entering the inside of the charging gun through the plug-in hole 123. The addition of the second sealing member 14 further enhances the sealing performance of the charging gun at the plug-in part 222, effectively preventing external water vapor from entering the area between the gun head 12 and the gun body 11 during disassembly, and ensuring the normal operation of the internal electrical system.

[0062] Further, the first sealing ring 15 is located at the sealing part 221 of the charging gun head 12 part adjacent to the plug-in hole 123. Its main function is to prevent external water vapor or moisture from entering the inside of the charging gun body 11 from the plug-in hole 123, to ensure the internal dryness and cleanliness of the charging gun during use, and to avoid damage to the electrical system by water vapor or dust. The first sealing ring 15 is the first sealing of the terminal at the gun head 12, which is located at the terminal plug-in hole 123. After the gun body 11 and the gun head 12 are closed, the first sealing ring 15 ensures the sealing performance at the plug-in hole 123, thereby effectively preventing external water vapor from entering the inside of the gun body 11, protecting the electronic components and terminals of the charging gun.

[0063] During the replacement of parts of the charging gun, the gun body 11 and the gun head 12 are connected and closed by docking. The sealing ring first forms a seal at the plug-in hole 123 to prevent water vapor from entering the gun body 11 through the plug-in hole 123. Then, in cooperation with the sealing elements between the gun body 11 and the gun head 12, more comprehensive protection is provided.

[0064] In a specific embodiment, the charging gun further comprises a second sealing ring 16, which is sleeved on the outer wall of the connecting piece 22 and abuts against the inner wall of the fixed hole 211.

[0065] Specifically, the second sealing ring 16 is arranged on the outer wall of the connecting piece 22 to form a multiple sealing structure together with the first sealing ring 15 and other sealing elements, ensuring that the inside of the charging gun always maintains a dry and clean environment. This multiple sealing design ensures that the sealing performance is not affected even during frequent plugging and unplugging of the terminal, further enhancing the protection capability of the equipment. The second sealing ring 16 is in contact with the inner wall of the fixed hole 211, strengthening the sealing effect between the connecting piece 22 and the gun body 11. When replacing the terminal, the connecting piece 22 and the gun body 11 are always sealed, and the plugging and unplugging of the terminal and the connecting piece 22 is not affected, greatly improving the waterproof and dustproof performance of the charging gun and prolonging the service life of the equipment.

[0066] In a specific embodiment, the connecting assembly 20 further comprises a fixed block 23 fixedly connected with the fixed seat 21, the fixed block 23 extends into the fixed hole 211 and abuts against the sealing part 221, and the fixed block 23 is attached to the inner wall of the fixed seat 21 to fix the connecting piece 22.

[0067] The side wall of the fixed seat 21 and the fixed block 23 form a glue injection cavity 24, and the glue injection cavity 24 is filled with glue to seal the fixed hole 211.

[0068] Specifically, the fixed connection between the fixed block 23 and the fixed seat 21 ensures the stable position of the connecting piece 22 inside the gun body 11, preventing the connecting piece 22 from moving due to external forces such as vibration and friction during use. The design of the fixed block 23 ensures that the connecting piece 22 is firmly fixed inside the gun body 11, avoiding the situation of poor contact, unstable conduction or safety hazards caused by the insecure connecting piece 22. The fixed block 23 extends into the fixed hole 211 and contacts the sealing part 221, which helps to ensure that the sealing part 221 tightly fits the inner wall of the fixed seat 21, avoiding the shaking of the connecting piece 22 in the fixed seat 21 during the process of plugging and unplugging the terminal.

[0069] Further, the fixed seat 21 side wall and the fixed block 23 form an injection cavity 24, which can be further reinforced by injecting sealing material when the fixed part 60 and the connecting piece 22 are fixed, and ensure the complete sealing of the sealing hole. This design enhances the structural connection between the fixed seat 21 and the fixed block 23, preventing external substances such as water and dust from entering the gun body 11 from the fixed hole 211. The injection of sealing glue also makes the fixed block 23 and the fixed seat 21 firmly connected, further fixing the stability of the terminal. The sealing glue filled in the injection cavity 24 plays a sealing and waterproof role after curing. The sealing glue has good anti-aging, temperature resistance and waterproof performance, can withstand changes in temperature and humidity from the outside, and to some extent, absorb external pressure changes, maintain the stable connection between the fixed part 60 and the fixed seat 21.

[0070] In a specific embodiment, the charging gun further comprises a sealing sleeve 40 sleeved around the fixed seat 21, which divides the accommodation cavity 121 into a first cavity 121a and a second cavity 121b, and the connecting assembly 20 is arranged in the first cavity 121a. The sealing sleeve 40 is used to isolate external water vapor from entering the connecting assembly 20.

[0071] Specifically, the sealing sleeve 40 is a protective device sleeved around the fixed seat 21, which mainly prevents external water vapor (such as water vapor penetration due to imperfect sealing at the joint between the gun body 11 and the gun head 12 caused by long-term use, or during the splicing process) from entering the charging gun, especially the connecting assembly 20 area where the electrical components are located. The sealing sleeve 40 isolates the water vapor entering from the joint by physical isolation, ensuring that the internal electrical system is not affected.

[0072] Further, the sealing sleeve 40 is fixed at one end to the peripheral surface of the fixed seat 21 and is in communication with the cable outlet of the charging gun at the other end, and performs plugging. The one end of the sealing sleeve 40 is fixed at the peripheral surface of the fixed seat 21 by a physical method, and the stable position is ensured. The fixed seat 21 is located inside the accommodating cavity 121, and the sealing performance of the inner cavity of the charging gun is further enhanced through the close fit of the sealing sleeve 40. This design ensures that the charging gun can effectively prevent external water vapor from entering the internal area through the fixed seat 21 during use. The other end of the sealing sleeve 40 is connected with the cable outlet, and the cable outlet part of the charging gun is plugged, so that external moisture cannot enter the gun body 11 from the cable outlet.

[0073] Further, the sealing cover divides the accommodating cavity 121 into two cavities, and the electrical components are covered by the sealing sleeve 40. The gun body 11 itself provides an outer waterproof protection, avoiding the entry of external water vapor into the charging gun. Then, the presence of the sealing sleeve 40 further forms a second layer of waterproof barrier, which ensures that the electrical components work in a more closed environment, thereby effectively preventing the damage of water vapor to the electrical components.

[0074] The sealing ring at the gun head 12 and the sealing member at the cover joint of the gun body 11 and the gun head 12 form the first and second waterproof barriers. In combination with the sealing design in the connecting piece 22, a complete multi-seal system is formed, which can ensure that even if the external waterproof layer fails, the internal sealing system can still block the entry of water vapor. Even if the signal terminal is disassembled and replaced, it will not affect the sealing performance of the whole charging gun.

[0075] In a specific embodiment, the insertion part 222 is provided with a counterbore 222a, and the connecting assembly 20 further comprises an elastic snap ring 25 abutting the inner wall of the counterbore 222a. The insertion end of the first terminal 30 has an insertion surface 31, and the elastic snap ring 25 specifically has an elastic abutting surface 251 abutting the insertion surface 31 to fix the first terminal 30.

[0076] Specifically, the elastic snap ring 25 is a ring-shaped elastic element, one end surface of which is in contact with the inner wall of the counterbore 222a, and the elastic abutting surface 251 is in close contact with the insertion surface 31 of the first terminal 30. The elastic part 253 of the elastic snap ring 25 can abut and maintain a certain pressure, thereby fixing the terminal in the insertion part 222. Through the elastic action of the elastic snap ring 25, the first terminal 30 can be firmly fixed in the insertion part 222. Even in the process of high load or long time use, the terminal will not fall off due to vibration or external force, ensuring the stable electrical connection between the terminal and the electrical components. Compared with the traditional bolt or buckle type fixing method, the design of the elastic snap ring 25 makes the plugging of the terminal more convenient.

[0077] In an embodiment, the elastic clamping ring 25 comprises a fixed part 252 and an elastic part 253, the fixed part 252 is arranged at the opposite ends of the elastic part 253;

[0078] The fixed part 252 abuts against the inner wall of the counterbore 222a, and the elastic part 253 abuts against the first terminal 30. In the axial direction of the elastic clamping ring 25, the maximum inner diameter of the elastic part 253 is less than or equal to the minimum inner diameter of the fixed part 252.

[0079] Specifically, the fixed part 252 is located at one of the two ends of the elastic clamping ring 25, and mainly functions to contact the inner wall of the counterbore 222a of the plug-in part 222, and to maintain the stable position of the clamping ring in the plug-in part 222. The fixed part 252 ensures that the clamping ring will not be deviated or detached due to external force through physical contact. The elastic part 253 is the middle part of the elastic clamping ring 25, which is elastic and in contact with the terminal. The elastic part 253 functions to provide sufficient elastic force to press the terminal, thereby ensuring that the terminal can be firmly fixed in the plug-in part 222. The contact between the fixed part 252 and the inner wall of the counterbore 222a ensures the stability of the elastic clamping ring 25 in the installed position, and the elastic part 253 provides continuous pressure by elastically abutting against the terminal, thereby firmly fixing the terminal in the plug-in part 222 and preventing the terminal from loosening or detaching.

[0080] In an embodiment, the connecting piece 22 further comprises a limiting part 223 arranged at one end of the plug-in part 222 away from the sealing part 221, and the limiting part 223 is used to limit the movement of the elastic clamping ring 25.

[0081] Specifically, the limiting part 223 is arranged at one end of the plug-in part 222 away from the sealing part 221, and is usually located at the rear end of the plug-in part 222 of the connecting piece 22. The function of this part is to limit the movement of the elastic clamping ring 25 and ensure that the clamping ring is always in the predetermined position in the plug-in part 222. During the process of replacing the terminal, the limiting part 223 limits the movement of the elastic clamping ring 25 in the plug-in direction of the terminal, thereby preventing the clamping ring from detaching during the process of replacing the terminal and causing instability of the connection.

[0082] In an embodiment, the charging gun further comprises a second terminal 50 fixedly connected with the connecting piece 22, and the second terminal 50 abuts against the connecting piece 22.

[0083] The charging gun further comprises a fixing piece 60, the second terminal 50 is provided with a through hole, the fixing piece 60 extends into the through hole and abuts against the second terminal 50 and the connecting piece 22 to be fixedly connected, and the charging gun further comprises a sealing gasket 70 arranged between the fixing piece 60 and the second terminal 50, and used to seal the through hole.

[0084] Specifically, the fixing member 60 is inserted into the through hole of the second terminal 50 and abuts against the second terminal 50 and the connecting member 22, thereby fixing the second terminal 50. The presence of the fixing member 60 ensures that the position of the second terminal 50 inside the charging gun cannot be moved, enhances the mechanical strength of the entire device, and enables the second terminal 50 to stably bear the current without loosening. The through hole provides a path in the second terminal 50, enabling the fixing member 60 to enter through the hole and connect with the second terminal 50. The design of the through hole enables the fixing member 60 to be firmly embedded in the second terminal 50, forming a stable electrical and mechanical connection with the connecting member 22.

[0085] In a specific embodiment, the fixing member 60 is a screw, which is threadedly connected with the connecting member 22, facilitating replacement and disassembly when damaged.

[0086] Further, the sealing gasket 70 is arranged between the fixing member 60 and the second terminal 50, aiming to seal the through hole and prevent external impurities such as water vapor and dust from entering the inside of the charging gun. The design of the fixing member 60 as a screw makes the disassembly process more convenient, without the need for special tools, saving time and cost.

[0087] In a specific embodiment, the second terminal 50 is a power terminal.

[0088] The above only describes the embodiments of the present application, and it should be noted that, for those skilled in the art, improvements can be made without departing from the inventive concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A charging gun, characterized in that, The application relates to a charging gun. The charging gun comprises a main body, a connecting assembly and a first terminal. The main body comprises a gun body and a gun head which are mutually covered. The gun body is provided with a containing cavity.

2. The charging gun of claim 1, wherein, The gun head partially extends into and blocks the containing cavity. The connecting assembly comprises a fixing seat and a connecting piece arranged on the fixing seat. The fixing seat is arranged in the containing cavity.

3. A charging gun according to claim 2, characterized in that The fixing seat is provided with a fixing hole which is communicated with the containing cavity. The connecting piece comprises a sealing part and a plug-in part which are arranged in sequence.

4. The charging gun of claim 1, wherein, The sealing part extends into the fixing hole and is in sealing connection with the fixing hole.

5. A charging gun according to claim 4, characterized in that The first terminal is plugged into the plug-in part and is in electrical connection with the sealing part. The plug-in end of the first terminal extends into the gun head and is in sealing connection with the gun head.

6. The charging gun of claim 1, wherein, The charging gun comprises a first sealing piece and a second sealing piece which are arranged between the gun body and the gun head.

7. The charging gun of claim 1, wherein, The end of the gun head close to the gun body is inwardly recessed to form a first step surface.

8. The charging gun of claim 7, wherein, The first step surface is annularly arranged on the butt joint end of the gun head and extends into the containing cavity. One end of the first sealing piece is annularly abutted on the step surface and the other end is in interference fit with the inner wall of the gun body.

9. The charging gun of claim 7, wherein, The gun head is provided with a plug-in hole. The first terminal extends into the plug-in hole. One end of the second sealing piece is abutted on the inner wall of the plug-in hole and the other end is in interference fit with the outer wall of the connecting piece. The plug-in hole is inwardly recessed at the end close to the connecting piece to form a second step surface. The second sealing piece is abutted on the second step surface. The charging gun further comprises a first sealing ring. The first sealing ring is sleeved on the outer wall of the first terminal and is abutted on the inner wall of the plug-in hole. The charging gun further comprises a second sealing ring. The second sealing ring is sleeved on the outer wall of the connecting piece and is abutted on the inner wall of the fixing hole. The connecting assembly further comprises a fixing block which is fixedly connected with the fixing seat. The fixing block extends into the fixing hole and is abutted on the sealing part. The fixing block is attached to the inner wall of the fixing seat to fix the connecting piece. The side wall of the fixing seat and the fixing block surround to form a glue injection cavity. Glue is injected into the glue injection cavity to seal the fixing hole. The charging gun further comprises a sealing sleeve which is sleeved on the circumferential surface of the fixing seat. The sealing sleeve separates the containing cavity to form a first cavity and a second cavity. The connecting assembly is arranged in the first cavity. The sealing sleeve is used to isolate external water vapor from entering the connecting assembly. The plug-in part is provided with a counterbore. The connecting assembly further comprises an elastic snap ring which is abutted on the inner wall of the counterbore. The plug-in end of the first terminal has a plug-in surface. The elastic snap ring has an elastic abutting surface which is abutted on the plug-in surface to fix the first terminal. The elastic snap ring comprises a fixing part and an elastic part which are arranged in one piece. The fixing part is arranged at the opposite ends of the elastic part. The fixing part is abutted on the inner wall of the counterbore. The elastic part is abutted on the first terminal. In the axial direction of the elastic snap ring, the maximum inner diameter of the elastic part is less than or equal to the minimum inner diameter of the fixing part. The connecting piece further comprises a limiting part which is arranged at the end of the plug-in part away from the sealing part. The limiting part is used to limit the movement of the elastic snap ring.

10. The charging gun of claim 1, wherein, The charging gun further comprises a second terminal fixedly connected with the connecting piece, and the second terminal abuts against the connecting piece; The charging gun further comprises a fixing piece, the second terminal is provided with a through hole, the fixing piece extends into the through hole and abuts against the second terminal and the connecting piece are fixedly connected, and the charging gun further comprises a sealing gasket, the sealing gasket is arranged between the fixing piece and the second terminal, and is used for sealing the through hole.

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