Charging gun

Abstract

The utility model discloses a charging gun, including casing, power terminal and heat insulating sleeve. The casing is equipped with the plug cavity, fixed cavity and containing chamber that communicate in proper order inside. The power terminal includes the plug -in portion, mounting portion and wiring portion that connect in proper order, the plug -in portion part is located in the plug cavity, and the wiring portion is contained in the containing chamber. The heat insulating sleeve is sleeved in the plug -in portion with the mounting portion outer wall, and the heat insulating sleeve is fixed in the fixed cavity. The utility model discloses a heat insulating sleeve is equipped with the power terminal, can avoid the heat on the power terminal and lead to the casing deformation.

Description

Technical Field

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

[0002] With the rapid development of the new energy vehicle industry, the construction of charging infrastructure and the performance requirements of charging equipment are increasingly stringent. As a core component for electric vehicle energy replenishment, the reliability, safety, and durability of the charging gun directly impact user experience and equipment lifespan. Currently, common charging guns on the market typically have the power terminals directly mounted and fixed inside the gun head cavity. While this connection method is simple and easy to assemble, the power terminals generate high temperatures during high-current charging due to heat generation. Because the power terminals are directly contacted with the gun head housing, heat is rapidly conducted to the gun head housing through the fixed structure, causing the overall temperature of the gun head to rise. The gun head is generally made of engineering plastics, which, while possessing certain heat resistance and mechanical strength, will experience significant degradation in material properties under prolonged high-temperature operation, specifically manifested as decreased mechanical strength and increased risk of thermal deformation. This thermal deformation not only causes changes in the shape and dimensions of the gun head shell, affecting assembly accuracy and connection reliability, but may also further lead to problems such as poor internal terminal contact, decreased insulation performance, and even safety hazards. Utility Model Content

[0003] The main objective of this utility model is to provide a charging gun, comprising: The housing has a socket, a fixing cavity and a receiving cavity connected in sequence inside the housing; A power terminal, comprising a plug-in portion, a mounting portion, and a wiring portion connected in sequence, wherein the plug-in portion is partially disposed in the plug-in cavity, and the wiring portion is accommodated in the accommodating cavity; A heat insulation sleeve is fitted onto the outer wall of the insertion part and the mounting part, and the heat insulation sleeve is fixed in the fixing cavity.

[0004] Optionally, in one embodiment of the present invention, the outer wall of the mounting part is provided with a protruding ring, the end of the protruding ring away from the insertion part is provided with a groove, a waterproof ring is provided in the groove, and the heat insulation sleeve is provided at the groove opening.

[0005] Optionally, in one embodiment of the present invention, the heat insulation sleeve includes a first heat insulation end and a second heat insulation end. The first heat insulation end has a first mounting cavity, and the second heat insulation end has a second mounting cavity. The first heat insulation end is sleeved on one end of the insertion part near the mounting part, and the second heat insulation end is sleeved outside the mounting part.

[0006] Optionally, in one embodiment of the present invention, the first mounting cavity has a first diameter that matches the diameter of the insertion portion, the second mounting cavity has a second diameter that matches the diameter of the protruding ring, and the first diameter is smaller than the second diameter.

[0007] Optionally, in one embodiment of the present invention, the second heat-insulating end is further provided with a flange at one end near the first heat-insulating end, and the flange is provided with a first abutting surface at one end facing the insertion cavity. The wall of the fixing cavity is further provided with a limiting part at the first end near the insertion cavity, and a first fixing hole is formed in the limiting part. The limiting part is provided with a limiting surface at one end facing the receiving cavity. The first heat-insulating end is installed in the first fixing hole so that the limiting surface abuts against the first abutting surface.

[0008] Optionally, in one embodiment of the present invention, the fixing cavity further includes a second fixing hole, the second fixing hole being located at the end of the first fixing hole away from the insertion cavity, the flange and the second heat-insulating end being located in the second fixing hole, and the second heat-insulating end being fitted with a sealing ring.

[0009] Optionally, in one embodiment of the present invention, the diameter of the first fixing hole is smaller than the diameter of the second fixing hole.

[0010] Optionally, in one embodiment of the present invention, a fixing part is further included. One end of the fixing part is disposed in the receiving cavity. A limiting protrusion is provided at the end of the fixing part facing the insertion cavity. A second abutting surface is provided on the limiting protrusion. The second abutting surface abuts against the end of the second heat insulation end away from the first heat insulation end.

[0011] Optionally, in one embodiment of the present invention, the end of the limiting protrusion away from the receiving cavity is further provided with an abutment portion, which is located between the second heat insulation end and the second fixing hole.

[0012] Optionally, in one embodiment of the present invention, the heat insulation sleeve is a nylon heat insulation sleeve; and / or, the housing includes a gun head, which is a polycarbonate material gun head.

[0013] This invention effectively achieves physical isolation between the power terminals and the housing by adding a heat-insulating sleeve to the outer wall of the insertion and mounting parts of the power terminals and securely assembling the fixing sleeve in the fixing cavity inside the housing. This structure effectively blocks the heat transfer path to the housing through direct contact, significantly reducing the thermal impact on the housing caused by the temperature rise of the power terminals during charging. It avoids the problem of reduced material strength and deformation of the housing due to overheating, helps maintain the dimensional stability and mechanical reliability of the overall structure of the charging gun, thereby extending the product's service life and improving safety performance. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a cross-sectional view of the charging gun part of this utility model; Figure 2 This is a schematic diagram of the charging gun part of the present invention; Figure 3 This is an exploded view of the charging gun part of this utility model; Figure 4 This is a schematic diagram of the heat insulation sleeve structure of this utility model; Figure 5 This is a schematic diagram of the power terminal structure of this utility model.

[0016] Explanation of icon numbers: 11. Insertion cavity; 12. Fixing cavity; 12a. First fixing hole; 12b. Second fixing hole; 121. Limiting part; 122. Limiting surface; 13. Receiving cavity; 20. Power terminal; 21. Insertion part; 22. Mounting part; 221. Raised ring; 222. Groove; 23. Wiring part; 30. Heat insulation sleeve; 31. First heat insulation end; 31a. First mounting cavity; 32. Second heat insulation end; 32a. Second mounting cavity; 33. Flange; 331. First abutting surface; 41. Waterproof ring; 42. Sealing ring; 50. Fixing part; 51. Limiting protrusion; 52. Second abutting surface; 53. Abutting part.

[0017] 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

[0018] 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.

[0019] 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 certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] 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.

[0021] With the rapid development of the new energy vehicle industry, the construction of charging infrastructure and the performance requirements of charging equipment are increasingly stringent. As a core component for electric vehicle energy replenishment, the reliability, safety, and durability of the charging gun directly impact user experience and equipment lifespan. Currently, common charging guns on the market typically have the power terminals directly mounted and fixed inside the gun head cavity. While this connection method is simple and easy to assemble, the power terminals generate high temperatures during high-current charging due to heat generation. Because the power terminals are directly contacted with the gun head housing, heat is rapidly conducted to the gun head housing through the fixed structure, causing the overall temperature of the gun head to rise. The gun head is generally made of engineering plastics, which, while possessing certain heat resistance and mechanical strength, will experience significant degradation in material properties under prolonged high-temperature operation, specifically manifested as decreased mechanical strength and increased risk of thermal deformation. This thermal deformation not only causes changes in the shape and dimensions of the gun head shell, affecting assembly accuracy and connection reliability, but may also further lead to problems such as poor internal terminal contact, decreased insulation performance, and even safety hazards.

[0022] In view of this, the present invention proposes a charging gun that effectively achieves physical isolation between the power terminal and the housing by adding a heat-insulating sleeve to the outer wall of the plug-in part and the mounting part of the power terminal, and by securely assembling the fixing sleeve in the fixing cavity inside the housing. This structure effectively blocks the heat transfer path to the housing through direct contact, significantly reducing the thermal impact on the housing caused by the temperature rise of the power terminal during charging, avoiding the problem of reduced material strength and deformation of the housing due to overheating, and helping to maintain the dimensional stability and mechanical reliability of the overall structure of the charging gun, thereby extending the service life of the product and improving safety performance.

[0023] To better understand the above technical solution, a detailed explanation of the technical solution is provided below with reference to the accompanying drawings.

[0024] like Figure 1-5 As shown, this utility model proposes a charging gun, including a housing, a power terminal 20, and a heat insulation sleeve 30. The housing contains a plug-in cavity 11, a fixing cavity 12, and a receiving cavity 13 connected in sequence. The power terminal 20 includes a plug-in portion 21, a mounting portion 22, and a wiring portion 23 connected in sequence. The plug-in portion 21 is partially disposed in the plug-in cavity 11, and the wiring portion 23 is received in the receiving cavity 13. The heat insulation sleeve 30 is sleeved on the outer walls of the plug-in portion 21 and the mounting portion 22, and the heat insulation sleeve 30 is fixed in the fixing cavity 12.

[0025] Understandably, the charging gun includes a housing, a power terminal 20, and a heat insulation sleeve 30. Inside the housing, an interconnected insertion cavity 11, a fixing cavity 12, and a receiving cavity 13 are arranged axially, forming an effective support and isolation arrangement for the internal functional components. The power terminal 20, as the core conductive element, includes, from front to back, an insertion part 21, a mounting part 22, and a wiring part 23. The front end of the insertion part 21 is located within the insertion cavity 11 for electrical connection with the electric vehicle's charging socket; the wiring part 23 is located in the receiving cavity 13 for electrical connection with a cable, the other end of which connects to the charging pile. During insertion, the insertion part 21 of the power terminal 20 is designed for precise mating with the corresponding terminal module in the standard charging socket. Preferably, the front end of the insertion part 21 has a guide structure and an elastic contact piece, which provides good mating guidance during insertion and ensures stable contact pressure after mating, thereby achieving the low contact resistance and high reliability required for high current transmission. The wiring portion 23 of the power terminal 20 is located inside the receiving cavity 13. The wiring portion 23 is used to achieve mechanical fixation and electrical conduction with the external cable conductor. The wiring portion 23 is connected to the cable by crimping, bolting, or welding to ensure that overheating or loosening does not occur under high current load. At the same time, the receiving cavity 13 provides necessary insulation and mechanical protection for the cable connection. To block the heat conduction path, this utility model provides a heat insulation sleeve 30 made of high temperature resistant and low thermal conductivity material around the insertion portion 21 and mounting portion 22 of the power terminal 20. The heat insulation sleeve 30 is fixedly installed in the fixing cavity 12 of the housing by interference fit or snap-fit ​​structure, effectively isolating the high temperature generated by the power terminal 20 during operation from the direct transmission to the housing, avoiding the mechanical performance degradation or thermal deformation of the housing due to excessive temperature rise, thereby improving the overall durability, safety, and connection stability of the charging gun.

[0026] Furthermore, in one embodiment of the present invention, the outer wall of the mounting part 22 is provided with a protruding ring 221, and the end of the protruding ring 221 away from the insertion part 21 is provided with a groove 222. A waterproof ring 41 is provided in the groove 222, and the heat insulation sleeve 30 is covered on the groove 222 opening.

[0027] Understandably, the outer wall of the mounting portion 22 of the power terminal 20 is provided with an integrally formed protruding ring 221, which extends circumferentially along the mounting portion 22 and protrudes radially. On the end face of the protruding ring 221 away from the insertion portion 21, there is a ring-shaped groove 222. A waterproof ring 41 is embedded in the groove 222. The waterproof ring 41 is made of elastic sealing material and is used to prevent external liquids or moisture from entering through the assembly gap between the mounting portion 22 and the heat insulation sleeve 30. The heat insulation sleeve 30 corresponds to the groove opening of the groove 222 and cooperates with the structure of the protruding ring 221 to limit and compress the waterproof ring 41, while also playing an axial positioning role, thereby enhancing the sealing performance and structural stability of the assembly between the power terminal 20 and the heat insulation sleeve 30.

[0028] Furthermore, in one embodiment of the present invention, the heat insulation sleeve 30 includes a first heat insulation end 31 and a second heat insulation end 32. The first heat insulation end 31 is provided with a first mounting cavity 31a, and the second heat insulation end 32 is provided with a second mounting cavity 32a. The first heat insulation end 31 is sleeved on the end of the insertion part 21 near the mounting part 22, and the second heat insulation end 32 is sleeved on the outside of the mounting part 22.

[0029] Understandably, the first mounting cavity 31a of the first heat-insulating end 31 is fitted onto the outer wall of the end of the power terminal 20 insertion portion 21 near the mounting portion 22, achieving effective thermal isolation of the insertion portion 21; the second mounting cavity 32a of the second heat-insulating end 32 is fitted onto the outer periphery of the mounting portion 22, covering the structural area including the convex ring 221 and the groove 222. The combined effect of the first heat-insulating end 31 and the second heat-insulating end 32 not only effectively blocks the radial transfer of heat during the operation of the power terminal 20 and protects the outer shell from high temperature, but its segmented design also facilitates assembly and ensures a good fit with various parts of the power terminal 20, improving the stability and sealing effect of the heat insulation component.

[0030] Furthermore, in one embodiment of the present invention, the first mounting cavity 31a has a first diameter that matches the diameter of the insertion portion 21, the second mounting cavity 32a has a second diameter that matches the diameter of the protruding ring 221, and the first diameter is smaller than the second diameter.

[0031] Understandably, the first mounting cavity 31a within the first heat-insulating end 31 has a first diameter, which matches the outer diameter of the plug-in portion 21 of the power terminal 20, allowing the first heat-insulating end 31 to be tightly fitted onto the outer periphery of the plug-in portion 21, forming effective thermal insulation and mechanical fixation. The second mounting cavity 32a within the second heat-insulating end 32 has a second diameter, which matches the outer diameter of the protruding ring 221 on the outer wall of the mounting portion 22 of the power terminal 20, allowing the second heat-insulating end 32 to fully cover the structure of the protruding ring 221 and effectively cover the groove 222 opening. The size of the first diameter is smaller than the second diameter. This size difference design allows the heat-insulating sleeve 30 to accurately correspond to the diameter changes of different sections of the power terminal 20, ensuring that the first heat-insulating end 31 and the plug-in portion 21, and the second heat-insulating end 32 and the mounting portion 22, respectively form a stable assembly. This stepped cavity structure not only enhances the overall installation stability of the insulation sleeve 30, but also improves the thermal sealing and structural adaptability of the insulation components in different diameter sections, preventing the power terminal 20 from falling off the insulation sleeve 30 during insertion and removal.

[0032] Furthermore, in one embodiment of the present invention, the second heat-insulating end 32 is provided with a flange 33 near the end of the first heat-insulating end 31. The flange 33 is provided with a first abutting surface 331 at the end facing the insertion cavity 11. The wall of the fixing cavity 12 is provided with a limiting part 121 near the first end of the insertion cavity 11. A first fixing hole 12a is formed in the limiting part 121. The limiting part 121 is provided with a limiting surface 122 at the end facing the receiving cavity 13. The first heat-insulating end 31 is installed in the first fixing hole 12a so that the limiting surface 122 abuts against the first abutting surface 331.

[0033] Understandably, the second heat-insulating end 32, near the first heat-insulating end 31, also has an integrally formed annular flange 33. The end face of this flange 33 facing the insertion cavity 11 forms a first abutment surface 331. In the fixing cavity 12 of the housing, the first end of its cavity wall near the insertion cavity 11 has an integrally formed limiting part 121. The limiting part 121 has a through first fixing hole 12a inside, the diameter of which is adapted to the outer dimensions of the first heat-insulating end 31. The end face of the limiting part 121 facing the receiving cavity 13 has a limiting surface 122. This limiting surface 122 is an annular plane, used to interact with the first abutment surface 331 in the axial direction to position and constrain the heat-insulating sleeve 30.

[0034] During assembly, the first heat insulation end 31 is installed in the first fixing hole 12a. The interaction between the limiting surface 122 and the first abutting surface 331 is used to achieve radial fixation of the heat insulation sleeve 30. This arrangement not only achieves accurate positioning and reliable fixation of the heat insulation sleeve 30 in the fixing cavity 12, preventing it from loosening or shifting during operation, but also helps to enhance the sealing of the overall structure, effectively blocking the axial transfer path of heat and moisture, and improving the safety and durability of the charging gun in high temperature and high humidity environments.

[0035] Furthermore, in one embodiment of the present invention, the fixing cavity 12 further includes a second fixing hole 12b, the second fixing hole 12b being located at the end of the first fixing hole 12a away from the insertion cavity 11, the flange 33 and the second heat insulation end 32 being located in the second fixing hole 12b, and the second heat insulation end 32 being fitted with a sealing ring 42.

[0036] Understandably, the fixing cavity 12 further includes a second fixing hole 12b, which is located at the end of the first fixing hole 12a away from the insertion cavity 11. The two are coaxially arranged and together form a segmented receiving space for the heat insulation sleeve 30 assembly. The second heat insulation end 32 and its end flange 33 are integrally received inside the second fixing hole 12b. The diameter of the second fixing hole 12b is adapted to the outer diameter of the flange 33, which can provide stable support and positioning in the radial direction, ensuring that the heat insulation sleeve 30 does not deviate or move within the housing. In addition, a sealing ring 42 is also fitted around the outer periphery of the second heat insulation end 32. The sealing ring 42 is made of rubber or silicone material with excellent elasticity, and its cross-sectional shape forms an interference fit with the inner wall of the second fixing hole 12b and the outer surface of the second heat insulation end 32. The sealing ring 42 can effectively fill the assembly gap between the second heat insulation end 32 and the inner wall of the second fixing hole 12b, preventing external water vapor, dust and other pollutants from penetrating into the insertion cavity 11 or the receiving cavity 13 along the fixing cavity 12, significantly improving the sealing protection level inside the charging gun, and ensuring the electrical safety and long-term working reliability of the power terminal 20 in complex environments.

[0037] Furthermore, in one embodiment of this utility model, the diameter of the first fixing hole 12a is smaller than the diameter of the second fixing hole 12b.

[0038] Understandably, the diameter of the first fixing hole 12a is smaller than that of the second fixing hole 12b, thus forming a stepped diameter-changing structure inside the fixing cavity 12. This diameter difference design allows the first fixing hole 12a to form a tight clearance fit or interference fit with the outer diameter of the first heat insulation end 31, achieving radial fastening and precise positioning of the first heat insulation end 31. Meanwhile, the larger second fixing hole 12b provides assembly space for the second heat insulation end 32 and its flange 33 structure, enabling smooth installation and full cooperation with the sealing ring 42. This stepped hole structure not only facilitates the segmented assembly of the heat insulation sleeve 30 components, improving production assembly efficiency, but also helps ensure that the first heat insulation end 31 and the second heat insulation end 32 maintain a stable relative position within their respective fixing holes. Furthermore, the stepped surface formed at the diameter change can also serve as an axial positioning reference, cooperating with the flange 33 structure on the heat insulation sleeve 30 to further constrain the axial movement of the parts, enhancing the structural integrity, stability, and sealing durability of the entire heat insulation sleeve 30 under conditions of vibration, insertion / removal, etc.

[0039] Furthermore, in one embodiment of the present invention, a fixing part 50 is also included. One end of the fixing part 50 is disposed in the receiving cavity 13. The fixing part 50 has a limiting protrusion 51 at the end facing the insertion cavity 11. The limiting protrusion 51 has a second abutting surface 52. The second abutting surface 52 abuts against the end of the second heat insulation end 32 away from the first heat insulation end 31.

[0040] Understandably, the charging gun also includes a separate fixing part 50. One end of the fixing part 50 is located inside the receiving cavity 13 of the housing and is relatively fixed to the housing by screws or interference fit. At the end of the fixing part 50 facing the insertion cavity 11, there is an integrally formed limiting protrusion 51. This limiting protrusion 51 is usually an annular or partial boss structure, and its end face facing the insertion cavity 11 forms a second abutment surface 52. During assembly, the second abutment surface 52 tightly abuts axially against the end face of the second heat insulation end 32 away from the first heat insulation end 31. Through this abutment structure, the fixing part 50 can provide stable axial support and limiting effect on the heat insulation sleeve 30 from the end away from the insertion cavity 11, preventing the second heat insulation end 32 and the entire power terminal 20 from displacing towards the receiving cavity 13 under insertion, removal or vibration conditions, thereby ensuring that the relative position of the power terminal 20 and the heat insulation sleeve 30 always remains stable, further improving the overall rigidity and connection reliability of the internal structure of the charging gun.

[0041] Furthermore, in one embodiment of the present invention, the end of the limiting protrusion 51 away from the receiving cavity 13 is also provided with an abutment portion 53, which is located between the second heat insulation end 32 and the second fixing hole 12b.

[0042] Understandably, the end of the limiting protrusion 51 furthest from the receiving cavity 13 further extends to form an abutment portion 53. This abutment portion 53 extends axially outward from the end face of the limiting protrusion 51, and its cross-section is annular or has a partial boss structure. The abutment portion 53 is disposed between the outer peripheral surface of the second heat-insulating end 32 and the inner wall surface of the second fixing hole 12b, maintaining contact or a slight clearance fit with both. The sealing ring 42 is housed in the space enclosed by the flange 33, the second heat-insulating end 32, the abutment portion 53, and the hole wall of the second fixing hole 12b, preventing displacement of the sealing ring 42. Simultaneously, the abutment portion 53 provides radial auxiliary positioning and support for the second heat-insulating end 32, effectively limiting radial swaying or eccentricity of the second heat-insulating end 32 within the second fixing hole 12b, improving the alignment and assembly stability of the heat-insulating sleeve 30 assembly. Meanwhile, the abutment portion 53 also enhances the structural continuity between the second heat insulation end 32 and the second fixing hole 12b, which helps to improve stress distribution, prevents loosening of the connection due to long-term vibration or thermal cycling, and further ensures the sealing reliability and mechanical durability of the charging gun under harsh working conditions.

[0043] Furthermore, in one embodiment of this utility model, the heat insulation sleeve 30 is a nylon heat insulation sleeve 30; and / or, the housing includes a gun head, which is a polycarbonate material gun head.

[0044] Understandably, the heat insulation sleeve 30 is made of nylon. Nylon has the characteristics of high mechanical strength, good heat resistance, and low thermal conductivity, which can effectively block the heat generated by the power terminal 20 from being transferred to the housing, while ensuring that the heat insulation sleeve 30 itself maintains stable structural and insulation performance in high-temperature environments. Optionally, the housing includes a gun head, which is made of polycarbonate. Polycarbonate has excellent impact strength, heat resistance, and dimensional stability, which can meet the requirements of the charging gun for the mechanical strength and insulation performance of the housing. At the same time, its surface is easy to process, and it has a good appearance and durability. Furthermore, the combination of the nylon heat insulation sleeve 30 and the polycarbonate gun head, through the complementary properties of the materials, achieves better thermal insulation while ensuring structural strength, significantly reducing the risk of deformation of the gun head due to heat accumulation, and improving the overall service life and safety reliability of the charging gun.

[0045] 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 housing has a plug-in cavity (11), a fixing cavity (12) and a receiving cavity (13) connected in sequence. The power terminal (20) includes a plug-in part (21), a mounting part (22) and a wiring part (23) connected in sequence. The plug-in part (21) is partially disposed in the plug-in cavity (11), and the wiring part (23) is accommodated in the accommodating cavity (13). A heat insulation sleeve (30) is fitted onto the outer wall of the insertion part (21) and the mounting part (22), and the heat insulation sleeve (30) is fixed in the fixing cavity (12).

2. The charging gun as described in claim 1, characterized in that, The outer wall of the mounting part (22) is provided with a protruding ring (221), and the end of the protruding ring (221) away from the plug-in part (21) is provided with a groove (222). A waterproof ring (41) is provided in the groove (222), and the heat insulation sleeve (30) is covered on the groove (222).

3. The charging gun as described in claim 2, characterized in that, The heat insulation sleeve (30) includes a first heat insulation end (31) and a second heat insulation end (32). The first heat insulation end (31) has a first mounting cavity (31a) and the second heat insulation end (32) has a second mounting cavity (32a). The first heat insulation end (31) is sleeved on one end of the insertion part (21) near the mounting part (22), and the second heat insulation end (32) is sleeved on the outside of the mounting part (22).

4. The charging gun as described in claim 3, characterized in that, The first mounting cavity (31a) has a first diameter that matches the diameter of the insertion part (21), and the second mounting cavity (32a) has a second diameter that matches the diameter of the protruding ring (221). The first diameter is smaller than the second diameter.

5. The charging gun as described in claim 4, characterized in that, The second heat insulation end (32) is provided with a flange (33) at one end near the first heat insulation end (31). The flange (33) is provided with a first abutting surface (331) at one end facing the insertion cavity (11). The wall of the fixing cavity (12) is provided with a limiting part (121) at the first end near the insertion cavity (11). A first fixing hole (12a) is formed in the limiting part (121). A limiting surface (122) is provided at one end of the limiting part (121) facing the receiving cavity (13). The first heat insulation end (31) is installed in the first fixing hole (12a) so that the limiting surface (122) abuts against the first abutting surface (331).

6. The charging gun as described in claim 5, characterized in that, The fixing cavity (12) further includes a second fixing hole (12b), which is located at the end of the first fixing hole (12a) away from the insertion cavity (11). The flange (33) and the second heat insulation end (32) are located in the second fixing hole (12b), and the second heat insulation end (32) is covered with a sealing ring (42).

7. The charging gun as described in claim 6, characterized in that, The diameter of the first fixing hole (12a) is smaller than the diameter of the second fixing hole (12b).

8. The charging gun as described in claim 7, characterized in that, It also includes a fixing part (50), one end of which is disposed in the receiving cavity (13). The fixing part (50) facing the insertion cavity (11) has a limiting protrusion (51), and the limiting protrusion (51) has a second abutting surface (52), which abuts against the end of the second heat insulation end (32) away from the first heat insulation end (31).

9. The charging gun as described in claim 8, characterized in that, The end of the limiting protrusion (51) away from the receiving cavity (13) is also provided with an abutment portion (53), which is located between the second heat insulation end (32) and the second fixing hole (12b).

10. The charging gun as described in claim 1, characterized in that, The heat insulation sleeve (30) is a nylon heat insulation sleeve; and / or, the housing includes a gun head, which is a polycarbonate material gun head.

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