Charging gun

Abstract

The utility model discloses a kind of charging gun, including shell, pressing plate and multiple terminal assemblies. Shell is composed of gun body and gun head, and the gun head is provided with mutually interconnected plug-in cavity and first installation cavity. Pressing plate is arranged in the shell interior, and second installation cavity is opened on it and communicated with the first installation cavity. The plug-in part of terminal assembly is detachably connected with base part, and the outer wall of plug-in part is provided with first limiting protrusion. The first limiting step in the gun head is abutted with the one end of first limiting protrusion close to plug-in cavity, while the one end of pressing plate close to plug-in cavity is abutted with the other end of first limiting protrusion, forming the three-point clamping structure of "first limiting step-first limiting protrusion-pressing plate". The structure can accurately lock plug-in part in preset axial position, effectively bear axial force in plug-in process, facilitate to repair and replace plug-in part, and improve the extreme stability and reliability of electrical connection.

Description

Technical Field

[0001] This utility model relates to the field of electrical connectors, and in particular to a charging gun. Background Technology

[0002] With the increasing popularity of electric vehicles, the reliability and stability of the charging gun, as a key component connecting charging equipment and the vehicle, are of paramount importance. The charging gun contains pins; one end of the pin plugs into the charging socket, and the other end is fixedly connected to the cable. During charging, the charging gun needs to be frequently plugged and unplugged, causing repeated friction on the pins, leading to damage and potential safety hazards. In existing technologies, when a pin is damaged, the entire charging gun needs to be replaced, significantly increasing costs. Utility Model Content

[0003] The main objective of this utility model is to provide a charging gun, comprising: The outer casing includes a gun body and a gun head, the gun head being connected to the gun body, and the gun head having a insertion cavity and a first mounting cavity, the insertion cavity and the first mounting cavity being in communication; A pressure plate is disposed inside the outer casing, and the pressure plate is provided with a second mounting cavity, which communicates with the first mounting cavity; Multiple terminal assemblies are installed at one end in the first mounting cavity and the second mounting cavity, and at the other end in the plug-in cavity. Each terminal assembly includes a plug-in part and a base part. The plug-in part and the base part are detachably connected. A first limiting protrusion is provided on the outer wall of the plug-in part. A first limiting step is provided inside the gun head. The first limiting step abuts against the end of the first limiting protrusion near the plug-in cavity. The end of the pressure plate near the plug-in cavity abuts against the end of the first limiting protrusion away from the plug-in cavity.

[0004] Optionally, in one embodiment of the present invention, the plug-in portion includes a pin end and a socket end. One end of the pin end is disposed in the first mounting cavity, and the other end extends into the plug-in cavity. The base portion includes a plug-in end and a wiring end. The wiring end is fixedly installed in the second mounting cavity. The plug-in end is detachably plugged into the socket end. The wiring end is electrically connected to the cable.

[0005] Optionally, in one embodiment of the present invention, an elastic element is further provided inside the socket end, one end of the elastic element abuts against the inner wall of the socket end hole, and the other end elastically abuts against the plug end.

[0006] Optionally, in one embodiment of the present invention, the first limiting protrusion is located between the pin end and the socket end.

[0007] Optionally, in one embodiment of the present invention, the pin end is further provided with a first flange near the first limiting protrusion. The diameter of the first flange is larger than the diameter of the pin end and smaller than the diameter of the first limiting protrusion. The first mounting cavity wall is provided with a second limiting step corresponding to the first flange. The second limiting step abuts against the end of the second limiting protrusion near the insertion cavity.

[0008] Optionally, in one embodiment of the present invention, the first flange is provided with a first groove, and a sealing ring is provided in the first groove.

[0009] Optionally, in one embodiment of the present invention, a second flange is further provided between the plug-in end and the wiring end, the diameter of the second flange is larger than the diameter of the plug-in end, a second groove is provided on the second flange, and a second limiting protrusion is provided on the wall of the second mounting cavity, the second limiting protrusion being limited in the second groove.

[0010] Optionally, in one embodiment of the present invention, the end of the pressure plate facing the insertion cavity is provided with a positioning post along the axial direction, the gun head is provided with a positioning groove corresponding to the positioning post, a sealing sleeve is provided between the positioning post and the positioning groove, and the fastener passes through the bottom wall of the positioning groove and the sealing sleeve in sequence along the axial direction from the insertion cavity, and is fixedly connected to the locking hole in the positioning post.

[0011] This invention establishes the basic structure of a charging gun by connecting a casing comprising a gun body and a gun head, providing overall support and protection. The gun head features interconnected insertion cavities and a first mounting cavity, providing an insertion channel and accommodating space for the terminal assembly's insertion portion, facilitating subsequent assembly and fixation. A pressure plate within the casing, with a second mounting cavity communicating with the first mounting cavity, forms a complete mounting channel, providing a structural basis for modular installation and fixation of the terminal assembly. Multiple terminal assemblies, each including an insertion portion and a base portion, with the insertion portion and base portion designed for detachable connection, allow for individual replacement of worn insertion portions, significantly reducing maintenance costs. A first limiting protrusion on the outer wall of the insertion portion, coupled with a corresponding first limiting step within the gun head, abuts against the end of the first limiting protrusion near the insertion cavity, preventing forward movement of the insertion portion. By abutting the end of the pressure plate near the insertion cavity against the other end of the first limiting protrusion away from the insertion cavity, the insertion part is prevented from moving backward. The first limiting step, the first limiting protrusion, and the pressure plate together form an axial clamping structure, ultimately achieving precise and secure locking of the insertion part in the preset axial position through a three-point clamping method of "first limiting step - first limiting protrusion - pressure plate". This effectively withstands the axial force during insertion and removal, facilitating the maintenance and replacement of the insertion part while ensuring the extreme stability and reliability of the electrical connection. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0013] Figure 1 This is a partial structural diagram of an embodiment of the charging gun of this utility model; Figure 2 This is a partial front view of an embodiment of the charging gun of this utility model; Figure 3 for Figure 2 Cross-sectional view at point AA; Figure 4 for Figure 3 Enlarged view at point B; Figure 5 This is an exploded view of an embodiment of the terminal assembly of this utility model; Figure 6 This is a schematic diagram of the structure of an embodiment of the terminal assembly of this utility model; Figure 7This is a schematic diagram of the structure of an embodiment of the plug-in part of this utility model; Figure 8 This is a schematic diagram of another embodiment of the terminal assembly of this utility model; Figure 9 for Figure 8 Cross-sectional view at CC; Figure 10 This is an exploded view of one embodiment of the outer shell of this utility model.

[0014] Explanation of icon numbers: 100. Charging gun; 10. Outer shell; 101. Gun body; 102. Gun head; 102a. Insertion cavity; 102b. First mounting cavity; 1021. First limiting step; 1022. Second limiting step; 1023. Positioning groove; 20. Pressure plate; 20a. Second mounting cavity; 201. Second limiting protrusion; 202. Positioning post; 203. Locking hole; 30. Terminal assembly; 301. Insertion part; 3011. Pin end; 3012. Socket end; 30123. Elastic element; 3013. First flange; 3014. First groove; 302. Base part; 3021. Insertion end; 3022. Wiring terminal; 3023. Second flange; 3024. Second groove; 303. First limiting protrusion; 40. Sealing ring; 50. Sealing sleeve; 60. Fastener.

[0015] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0018] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] With the increasing popularity of electric vehicles, the reliability and stability of the charging gun, as a key component connecting charging equipment and the vehicle, are of paramount importance. The charging gun contains pins; one end of the pin plugs into the charging socket, and the other end is fixedly connected to the cable. During charging, the charging gun needs to be frequently plugged and unplugged, causing repeated friction on the pins, leading to damage and potential safety hazards. In existing technologies, when a pin is damaged, the entire charging gun needs to be replaced, significantly increasing costs.

[0020] In view of this, the present invention proposes a charging gun. By setting a shell including a gun body and a gun head, and connecting the gun head to the gun body, the basic structure of the charging gun is formed, providing overall support and protection. By setting an interconnected insertion cavity and a first mounting cavity on the gun head, an insertion channel and accommodating space are provided for the insertion part of the terminal assembly, creating conditions for subsequent assembly and fixing. By setting a pressure plate inside the shell, and opening a second mounting cavity on the pressure plate that communicates with the first mounting cavity, a complete mounting channel is formed, providing a structural basis for the modular installation and fixing of the terminal assembly. By setting multiple terminal assemblies including insertion parts and base parts, and designing the insertion parts and base parts to be detachably connected, the insertion parts can be replaced individually after wear, greatly reducing maintenance costs. By setting a first limiting protrusion on the outer wall of the insertion part, and setting a first limiting step inside the gun head to cooperate with it, and simultaneously making the first limiting step abut against the end of the first limiting protrusion near the insertion cavity, the insertion part is prevented from moving forward. By abutting the end of the pressure plate near the insertion cavity against the other end of the first limiting protrusion away from the insertion cavity, the insertion part is prevented from moving backward. The first limiting step, the first limiting protrusion, and the pressure plate together form an axial clamping structure, ultimately achieving precise and secure locking of the insertion part in the preset axial position through a three-point clamping method of "first limiting step - first limiting protrusion - pressure plate". This effectively withstands the axial force during insertion and removal, facilitating the maintenance and replacement of the insertion part while ensuring the extreme stability and reliability of the electrical connection.

[0021] To better understand the above technical solution, a detailed explanation of the technical solution is provided below with reference to the accompanying drawings.

[0022] like Figure 1-10 As shown, this utility model proposes a charging gun, including a housing 10, a pressure plate 20, and multiple terminal assemblies 30. The housing 10 includes a gun body 101 and a gun head 102, the gun head 102 being connected to the gun body 101. The gun head 102 has a insertion cavity 102a and a first mounting cavity 102b, which communicate with each other. The pressure plate 20 is disposed within the housing 10, and the pressure plate 20 has a second mounting cavity 20a, which communicates with the first mounting cavity 102b. The terminal assembly 30 includes a insertion portion 301 and a base portion 302, one end of which is mounted in the first mounting cavity 102a. In 02b and the second mounting cavity 20a, the other end is located in the insertion cavity 102a. The insertion part 301 is detachably connected to the base part 302. The outer wall of the insertion part 301 is provided with a first limiting protrusion 303. The gun head 102 is provided with a first limiting step 1021. The first limiting step 1021 abuts against the end of the first limiting protrusion 303 near the insertion cavity 102a. The end of the pressure plate 20 near the insertion cavity 102a abuts against the end of the first limiting protrusion 303 away from the insertion cavity 102a.

[0023] Understandably, the charging gun is used to connect to a charging socket on an electric vehicle for high-power fast charging. The charging gun includes a housing 10, which provides installation space and protection for various electrical components within the charging gun. Preferably, the housing 10 is injection molded from high-strength engineering plastic, possessing good insulation, mechanical strength, and high-temperature resistance. The housing 10 includes a gun body 101 and a gun head 102, which are connected to the gun body 101 to form the housing 10. The gun head 102 has an insertion cavity 102a and a first mounting cavity 102b internally, which are interconnected. When the charging gun is connected to the charging socket, the insertion cavity 102a accommodates the charging socket, allowing the charging socket and the terminal assembly 30 of the charging gun to achieve a conductive connection within the insertion cavity 102a. The first mounting cavity 102b is used to fix and support the terminal assembly 30; its cavity size matches the terminal assembly 30, and its cavity wall may be provided with a limiting structure that mates with the terminal assembly 30 to enhance installation stability. The terminal assembly 30 is a conductive component of the charging gun, mainly comprising power terminals and signal terminals. The terminal assembly 30 is made of a highly conductive metallic material (such as copper or copper alloys or other materials). One end of the terminal assembly 30 is inserted into the insertion cavity 102a for connection with the corresponding terminal in the electric vehicle charging socket and for transmitting current; the other end is fixed within the first mounting cavity 102b and the second mounting cavity 20a, and reliably connected to the conductor of the cable through methods such as crimping and welding. The terminal assembly 30 not only performs the function of transmitting electrical energy but also needs to maintain sufficient mechanical strength and electrical contact reliability during insertion and removal. To ensure accurate axial positioning of the terminal assembly 30 within the housing 10 and to prevent it from retracting or shifting during insertion and removal, a limiting structure is provided on the insertion portion 301. Specifically, an annular first limiting protrusion 303 is integrally stamped on the outer wall of the insertion portion 301. Correspondingly, a first limiting step 1021 with varying inner diameter is designed within the inner cavity of the gun head 102. During assembly, the terminal assembly 30 is inserted from the first mounting cavity 102b toward the insertion cavity 102a. When the first limiting protrusion 303 moves to the first limiting step 1021, its end near the insertion cavity 102a is firmly blocked by the first limiting step 1021. At the same time, the pressure plate 20 fixed inside the gun body 101 has its end near the insertion cavity 102a tightly abutting against the other end of the first limiting protrusion 303. Through this three-point clamping structure of "first limiting step 1021 - first limiting protrusion 303 - pressure plate 20", the terminal assembly 30 is precisely locked in the preset axial position, bearing the axial force from the insertion and removal process, ensuring the extreme stability of the electrical connection.

[0024] Furthermore, in one embodiment of the present invention, the plug-in portion 301 includes a pin end 3011 and a socket end 3012. One end of the pin end 3011 is disposed in the first mounting cavity 102b, and the other end extends into the plug-in cavity 102a. The base portion 302 includes a plug-in end 3021 and a wiring end 3022. The wiring end 3022 is fixedly installed in the second mounting cavity 20a. The plug-in end 3021 is detachably plugged into the socket end 3012. The wiring end 3022 is electrically connected to the cable.

[0025] Understandably, the terminal assembly 30 adopts a split, pluggable structure, consisting of a plug-in portion 301 and a base portion 302. The plug-in portion 301 includes an elongated pin end 3011 and a hollow socket end 3012 connected to its root. The front end of the pin end 3011 extends into the plug-in cavity 102a for mating with the charging socket, while the rear end is located within the first mounting cavity 102b. The base portion 302 includes a plug-in end 3021 and a wiring end 3022. The plug-in end 3021 is a boss that matches the shape of the inner cavity of the socket end 3012, allowing it to be inserted into the socket end 3012 to achieve an electrical connection; the wiring end 3022 is used to establish a secure electrical and mechanical connection with the conductor of the cable. Preferably, the terminal 3022 can be designed with a crimping hole or a welding platform. This split design allows for the replacement of the plug part 301 or the base part 302 separately, which greatly reduces maintenance costs and time, while improving the flexibility of production and assembly.

[0026] Furthermore, in one embodiment of the present invention, an elastic element 30123 is also provided in the insertion end 3012, one end of the elastic element 30123 abuts against the inner wall of the insertion end 3012, and the other end elastically abuts against the insertion end 3021.

[0027] Understandably, to further optimize the electrical contact performance of the split terminal assembly 30, an elastic element 30123 is also provided in the inner cavity of the socket end 3012. This elastic element 30123 can be a coil spring or a leaf spring, with one end pressed tightly against the inner wall of the socket end 3012 to secure itself, and the other end elastically pressed against the surface of the inserted plug end 3021. The continuous elastic force provided by the elastic element 30123 ensures that the plug end 3021 and the socket end 3012 always maintain a tight physical contact, effectively overcoming contact problems that may be caused by tolerances, slight vibrations, or thermal expansion and contraction, and improving the stability and safety of high-current transmission.

[0028] Furthermore, in one embodiment of the present invention, the first limiting protrusion 303 is located between the pin end 3011 and the socket end 3012.

[0029] Understandably, the first limiting protrusion 303 is located axially between the pin end 3011 and the insertion hole end 3012. This arrangement ensures that the clamping point formed by the first limiting step 1021 and the pressure plate 20 is located between the pin end 3011 and the insertion hole end 3012, thereby balancing the torque generated by the insertion and extraction force and greatly enhancing the radial stability of the insertion part 301 within the cavity.

[0030] Furthermore, in one embodiment of the present invention, the pin end 3011 is provided with a first flange 3013 near the first limiting protrusion 303. The diameter of the first flange 3013 is larger than the diameter of the pin end 3011 and smaller than the diameter of the first limiting protrusion 303. The cavity wall of the first mounting cavity 102b is provided with a second limiting step 1022 corresponding to the first flange 3013. The second limiting step 1022 abuts against the end of the second limiting protrusion 201 near the insertion cavity 102a.

[0031] Understandably, a first flange 3013 is integrally formed on the pin end 3011. The diameter of the first flange 3013 is larger than the diameter of the pin end 3011 and smaller than the diameter of the first limiting protrusion 303. A second limiting step 1022 is provided on the wall of the first mounting cavity 102b of the gun head 102 at the position corresponding to the first flange 3013. When the insertion part 301 is installed in place, the second limiting step 1022 abuts against the end of the first flange 3013 near the insertion cavity 102a. Through the cooperation of the second limiting step 1022 and the first flange 3013, an auxiliary axial limiting of the insertion part 301 is formed. This structure provides a proximal radial support point for the slender pin end 3011, which works in conjunction with the support point at the first limiting protrusion 303 to greatly enhance the stability and positioning accuracy of the insertion part 301 in the insertion cavity 102a, effectively preventing shaking caused by insertion / removal misalignment or vibration.

[0032] Furthermore, in one embodiment of the present invention, a first groove 3014 is provided on the first flange 3013, and a sealing ring 40 is provided in the first groove 3014.

[0033] Understandably, an annular first groove 3014 is formed on the circumferential outer wall of the first flange 3013, and a sealing ring 40 is fitted inside the first groove 3014. When the insertion part 301 is axially positioned by abutting against the first limiting step 1021 and the second limiting step 1022 respectively through the first limiting protrusion 303 and the first flange 3013, the sealing ring 40 is elastically pressed against the cavity wall of the first mounting cavity 102b to form a radial sealing interface. This sealing structure is located at the limiting structure, has a compact layout, and can provide a reliable sealing effect while achieving precise axial positioning, ensuring the environmental tolerance of the internal electrical components of the charging gun.

[0034] Furthermore, in one embodiment of the present invention, a second flange 3023 is provided between the plug-in end 3021 and the wiring end 3022. The diameter of the second flange 3023 is larger than the diameter of the plug-in end 3021. A second groove 3024 is provided on the second flange 3023. A second limiting protrusion 201 is also provided on the wall of the second mounting cavity 20a. The second limiting protrusion 201 is limited in the second groove 3024.

[0035] Understandably, a second flange 3023 is integrally formed between the insertion end 3021 and the terminal 3022 of the base portion 302. The diameter of the second flange 3023 is larger than the diameter of the insertion end 3021. At least one annular second groove 3024 is provided on the circumferential sidewall of the second flange 3023. At the same time, a corresponding inwardly protruding second limiting protrusion 201 is provided on the cavity wall of the second mounting cavity 20a of the pressure plate 20. When the base portion 302 is installed in the second mounting cavity 20a, the second limiting protrusion 201 is engaged and confined within the second groove 3024, thereby forming a constraint in the radial direction of the second flange 3023, preventing the base portion 302 from axially displacing within the cavity, ensuring the overall stability of the terminal assembly 30 installation, and avoiding axial displacement of the base portion 302.

[0036] Furthermore, in one embodiment of this utility model, the end of the pressure plate 20 facing the insertion cavity 102a is provided with a positioning post 202 along the axial direction, the gun head 102 is provided with a positioning groove 1023 corresponding to the positioning post 202, a sealing sleeve 50 is provided between the positioning post 202 and the positioning groove 1023, and the fastener 60 passes through the bottom wall of the positioning groove 1023 and the sealing sleeve 50 in sequence along the axial direction from the insertion cavity 102a, and is fixedly connected to the locking hole 203 in the positioning post 202.

[0037] Understandably, at least one positioning post 202 extends axially from the end of the pressure plate 20 facing the insertion cavity 102a, and a positioning groove 1023 adapted to the positioning post 202 is correspondingly provided on the inner wall of the gun head 102. A sealing sleeve 50 is also provided within the mating structure of the positioning post 202 and the positioning groove 1023. The sealing sleeve 50 is fitted over the positioning post 202 and fills the annular gap between the positioning post 202 and the side wall of the positioning groove 1023. A fastener 60 passes sequentially from the bottom wall of the insertion cavity 102a through the through hole on the bottom wall of the positioning groove 1023 and the inner hole of the sealing sleeve 50, and finally screws into the locking hole 203 provided at the end of the positioning post 202. When the fastener 60 is locked, the pressure plate 20 is pulled toward the gun head 102, and at the same time the sealing sleeve 50 is compressed axially and produces radial elastic deformation, so that its outer wall forms a tight contact with the side wall, inner wall and surface of the positioning groove 1023 and the positioning post 202, thereby achieving a reliable connection and effective sealing between the pressure plate 20 and the gun head 102.

[0038] During installation, the charging gun of this utility model is first passed through the gun body 101 and connected to the terminal 3022 at the tail of the base part 302 of the terminal assembly 30. Then, the base part 302 is installed in the second mounting cavity 20a of the pressure plate 20, and the second limiting protrusion 201 is inserted into the second groove 3024 to achieve a fixed installation of the base part 302 and the pressure plate 20. The pressure plate 20 with the base part 302 installed is installed inside the gun body 101. A sealing sleeve 50 is fitted onto the positioning post 202 of the pressure plate 20, and the insertion part 301 with a sealing ring 40 is connected to the base part 302. Then, the gun head 102 is connected to the gun body 101, so that the first limiting protrusion 303 is limited between the first limiting step 1021 and the pressure plate 20, while the first flange 3013 is limited to the second limiting step 1022, thereby achieving the positioning and installation of the terminal assembly 30. Finally, the fastener 60 passes through the through hole on the bottom wall of the insertion cavity 102a and the inner hole of the sealing sleeve 50 in sequence from the bottom wall of the positioning groove 1023, and finally screws into the locking hole 203 provided at the end of the positioning post 202, thereby locking the gun head 102 and the pressure plate 20, and thus completing the assembly of the charging gun.

[0039] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A charging gun, characterized in that, include: The outer casing (10) includes a gun body (101) and a gun head (102), wherein the gun head (102) is connected to the gun body (101), and the gun head (102) is provided with a plug-in cavity (102a) and a first mounting cavity (102b), wherein the plug-in cavity (102a) and the first mounting cavity (102b) are in communication; A pressure plate (20) is disposed inside the outer shell (10), and a second mounting cavity (20a) is provided on the pressure plate (20), which is connected to the first mounting cavity (102b); Multiple terminal assemblies (30) are installed at one end in the first mounting cavity (102b) and the second mounting cavity (20a), and at the other end in the plug-in cavity (102a). The terminal assembly (30) includes a plug-in part (301) and a base part (302). The plug-in part (301) and the base part (302) are detachably connected. The outer wall of the plug-in part (301) is provided with a first limiting protrusion (303). The gun head (102) is provided with a first limiting step (1021). The first limiting step (1021) and the first limiting protrusion (303) abut against the end of the plug-in cavity (102a) near the first limiting protrusion (303). The end of the pressure plate (20) near the plug-in cavity (102a) abuts against the end of the first limiting protrusion (303) away from the plug-in cavity (102a).

2. The charging gun as described in claim 1, characterized in that, The plug-in portion (301) includes a pin end (3011) and a socket end (3012). One end of the pin end (3011) is located in the first mounting cavity (102b), and the other end extends into the plug-in cavity (102a). The base portion (302) includes a plug-in end (3021) and a wiring end (3022). The wiring end (3022) is fixedly installed in the second mounting cavity (20a). The plug-in end (3021) is detachably plugged into the socket end (3012). The wiring end (3022) is electrically connected to the cable.

3. The charging gun as described in claim 2, characterized in that, The insertion end (3012) is also provided with an elastic element (30123), one end of which abuts against the inner wall of the insertion end (3012), and the other end elastically abuts against the insertion end (3021).

4. The charging gun as described in claim 2, characterized in that, The first limiting protrusion (303) is located between the pin end (3011) and the socket end (3012).

5. The charging gun as described in claim 4, characterized in that, The insertion pin end (3011) is also provided with a first flange (3013) near the first limiting protrusion (303). The diameter of the first flange (3013) is larger than the diameter of the insertion pin end (3011) and smaller than the diameter of the first limiting protrusion (303). The cavity wall of the first mounting cavity (102b) is provided with a second limiting step (1022) corresponding to the first flange (3013). The second limiting step (1022) abuts against the end of the second limiting protrusion (201) near the insertion cavity (102a).

6. The charging gun as described in claim 5, characterized in that, The first flange (3013) is provided with a first groove (3014), and a sealing ring (40) is provided in the first groove (3014).

7. The charging gun as described in claim 4, characterized in that, A second flange (3023) is provided between the plug-in end (3021) and the wiring end (3022). The diameter of the second flange (3023) is larger than the diameter of the plug-in end (3021). A second groove (3024) is provided on the second flange (3023). A second limiting protrusion (201) is also provided on the wall of the second mounting cavity (20a). The second limiting protrusion (201) is limited to the second groove (3024).

8. The charging gun as described in claim 1, characterized in that, The pressure plate (20) has a positioning post (202) axially facing the insertion cavity (102a) at one end. The gun head (102) has a positioning groove (1023) corresponding to the positioning post (202). A sealing sleeve (50) is provided between the positioning post (202) and the positioning groove (1023). The fastener (60) passes through the bottom wall of the positioning groove (1023) and the sealing sleeve (50) axially from the insertion cavity (102a) and is fixedly connected to the locking hole (203) in the positioning post (202).

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