Charging gun head air tightness detection device

Abstract

The utility model discloses an air tightness detection device for a charging gun head, which belongs to the technical field of charging gun detection and comprises a splicing die, a locking piece, a clamping column, a rack, a lifting carrier plate and an air tightness detector. A lifting support plate is arranged in the rack, a detachable splicing mold is arranged between the lifting support plate and the rack, locking pieces are arranged between the splicing mold and the rack and between the splicing mold and the lifting support plate, an air tightness detector is arranged beside the rack, and a clamping column is arranged on the splicing mold. According to the utility model, through the rotatable locking pieces, when the opening directions of the locking pieces are the same, the splicing mold is detachable; and when the opening directions of the locking pieces are different, the splicing mold is locked, the mold can be quickly disassembled and replaced, and the application types of the detection equipment to the detection of the charging gun are increased.

Description

Technical Field

[0001] This utility model relates to the field of charging gun testing technology, and in particular to a charging gun head airtightness testing device. Background Technology

[0002] With the development of new energy vehicles, the charging gun heads need to meet the IP67 waterproof rating to ensure the safety of charging vehicles in rainy weather and to meet the moisture and dust protection requirements of the internal electronic components of the charging gun. Before leaving the factory, the charging gun needs to undergo an airtightness test. The shape of the charging gun is matched to a mold, and an airtightness tester is used to test the airtightness of the molded charging gun at its interfaces and joints.

[0003] Currently, airtightness testing of charging guns requires sealing the charging gun head using a mold, and then testing the airtightness by changing the air pressure. The testing equipment and mold are sold as a set. However, charging guns come in various shapes, and the molds are inconvenient to disassemble and replace. Different testing equipment with different molds is needed for mold-sealing testing of the charging guns. The testing equipment must be configured according to the type of charging gun; it cannot test other types or shapes of charging guns, resulting in a relatively limited range of applicable types of charging guns.

[0004] Therefore, it is necessary to develop a charging gun head airtightness testing device to solve the above problems. Utility Model Content

[0005] This utility model provides a charging gun head airtightness testing device to solve the problem that the existing testing equipment and mold are equipped as a set, and the defect testing equipment cannot test other types and shapes of charging guns, and the testing equipment is only applicable to charging gun testing.

[0006] This utility model provides a charging gun head airtightness testing device, comprising:

[0007] The assembly mold includes a movable half-shell and a fixed half-shell that can be assembled. Each of the movable and fixed half-shells has a bearing mold inside. Several evenly distributed snap-fit ​​posts are fixed to the sides of the half-shells that are far from each other. The end of each snap-fit ​​post away from the half-shell is a snap-fit ​​part. A locking component includes a locking post located on the side of the half-shells that is far from each other. A C-shaped first locking block is fixedly connected to the side of each locking post near the half-shell. A second locking block is fixedly connected to the end of each first locking block away from the locking post. The first and second locking blocks have the same opening direction and are configured such that the openings face the same direction for half-shell disassembly and the openings face different directions for half-shell locking.

[0008] In a further embodiment, the center of the opening of the locking block is a concentric semicircle, the inner diameter of the first locking block is larger than the inner diameter of the second locking block, and the movable half shell and the fixed half shell are combined to support the mold closing between the molds. The first locking block is used to lock the locking part, and the second locking block is used to lock the thin end of the locking post.

[0009] In a further embodiment, the charging gun head airtightness testing device further includes a frame, a cylinder is fixedly connected to the top of the frame, a lifting plate is provided inside the frame, the output end of the cylinder is fixedly connected to the top of the lifting plate, the movable half-shell is located on the bottom surface of the lifting plate, the lifting plate is used to carry the movable half-shell to lift, the fixed half-shell is located at the bottom of the frame, and sealing strips are provided on the sides of the movable half-shell and the fixed half-shell that are close to each other.

[0010] In a further embodiment, the locking posts on the movable half-shell are located at the four corners of the bottom surface of the lifting platform, and the locking posts on the fixed half-shell are located at the four corners of the bottom surface inside the frame. The other end of the locking post with the first locking block is rotatably connected to the frame and the lifting platform, respectively.

[0011] In a further embodiment, a connecting plug is provided between the lifting plate and the output end of the cylinder, and the air supply pipe at the bottom of the connecting plug extends to the bottom of the lifting plate. A vent pipe is fixedly connected to the top of the movable half shell, and the vent pipe is compatible with the air supply pipe at the bottom of the connecting plug.

[0012] In a further embodiment, a sealing collar is fitted onto the vent pipe, and a compression spring is provided at the bottom of the sealing collar. The sealing collar is configured such that after the vent pipe and the air supply pipe connecting the plug are aligned, the compression spring pushes up the sealing collar to seal the connection. The compression spring is fitted onto the vent pipe.

[0013] In a further embodiment, the locking pin has two mounting slots symmetrical about its axis of rotation at the end away from the first locking block. Each mounting slot is provided with a positioning ball and a positioning spring. The positioning spring is used to press the positioning ball out of the mounting slot. The bottom of the lifting plate and the bottom of the frame are provided with positioning slots arranged along the opening direction of the first locking block. The positioning slots and positioning balls are compatible.

[0014] In a further embodiment, guide rods are provided at the four corners of the frame, the guide rods pass through the lifting plate, and sleeves for use with the guide rods are fixedly connected to the four corners of the top surface of the lifting plate. The lifting plate moves up and down along the guide rods through the sleeves.

[0015] In a further embodiment, an airtightness tester is installed on the side of the frame, and a padding support is fixedly connected to the bottom of the fixed half shell. The fixed half shell is locked onto the frame, and the padding support is in contact with the bottom of the frame.

[0016] In a further embodiment, the supporting mold is used to hold the charging gun head, and after the mold is closed, a sealed cavity is formed between the mold and the charging gun head. The sealed cavity is used for evacuation and depressurization, and the vent pipe is connected to the sealed cavity. When the movable half shell is locked on the lifting plate, the connecting plug and the vent pipe are aligned and in contact.

[0017] The charging gun head airtightness testing device provided by this utility model has the following technical effects or advantages:

[0018] The system utilizes a movable half-shell and a fixed half-shell that can be detached from the frame, along with a carrier mold. The mold can be removed from the frame and replaced according to the different shapes and types of charging guns. Furthermore, the mold is locked in place by the different opening orientations of the locking components, while the same orientation allows for quick disassembly and replacement of the mold. This facilitates convenient and efficient mold replacement, differentiates the inherent pairing of the mold and the testing equipment, and increases the variety of charging gun heads the testing equipment can inspect, thus expanding its applicability to different types of charging guns. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of a charging gun head airtightness testing device provided in one embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional schematic diagram of the charging gun head airtightness testing device of this utility model. Figure 2 ;

[0022] Figure 3 This is a three-dimensional schematic diagram of the frame of the charging gun head airtightness testing device of this utility model;

[0023] Figure 4 This is a three-dimensional schematic diagram of a portion of the airtightness testing device for the charging gun head of this utility model. Figure 1 ;

[0024] Figure 5This is a partial structural front view of the charging gun head airtightness testing device of this utility model.

[0025] Figure 6 This is a partial structural cross-sectional view of the charging gun head airtightness testing device of this utility model;

[0026] Figure 7 This is a three-dimensional schematic diagram of a portion of the airtightness testing device for the charging gun head of this utility model. Figure 2 ;

[0027] Figure 8 This is a three-dimensional enlarged schematic diagram of the locking state of the locking component of this utility model;

[0028] Figure 9 This is a three-dimensional magnified schematic diagram of the locking component of this utility model in the unlocking and disassembly state;

[0029] Figure 10 This is a three-dimensional enlarged structural schematic diagram of the locking component of this utility model;

[0030] Figure 11 This is an enlarged cross-sectional structural diagram of the locking component of this utility model.

[0031] Figure label:

[0032] 1. Assembly mold; 101. Moving half-shell; 102. Fixed half-shell; 103. Bearing mold; 104. Sealing strip; 2. Locking component; 201. Locking post; 202. First locking block; 203. Second locking block; 3. Snap-fit ​​post; 301. Snap-fit ​​part; 4. Frame; 5. Cylinder; 6. Lifting carrier plate; 7. Connecting plug; 8. Vent pipe; 9. Sealing collar; 10. Compression spring; 11. Mounting groove; 12. Positioning ball; 13. Positioning spring; 14. Positioning groove; 15. Guide rod; 16. Sleeve; 17. Air tightness tester; 18. Pad support part; 19. Sealed cavity. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] As mentioned earlier, the testing equipment and molds are provided as a set. Charging guns come in various shapes, and the molds for charging guns are inconvenient to disassemble and replace. Therefore, different testing equipment is needed with different molds to perform mold-fitting testing on the charging guns. The testing equipment must be configured according to the type of charging gun; the testing equipment cannot test other types or shapes of charging guns, and its applicability for charging gun testing is relatively limited.

[0035] To address this issue, this utility model provides a charging gun head airtightness testing device. This device utilizes a movable half-shell 101 and a fixed half-shell 102, both detachable from the frame 4, to cooperate with a supporting mold 103. The mold is detached from the frame 4, and the supporting mold 103 can be replaced according to the different shapes and types of charging guns. Furthermore, the opening orientation of the locking member 2 allows for locking the mold in different directions, while the same opening orientation facilitates quick disassembly and replacement of the mold. This differentiates the inherent pairing of the mold and the testing equipment, increasing the types of charging gun heads the testing equipment can test, expanding its applicability to various charging gun types, and further increasing the variety of charging guns that manufacturers can produce.

[0036] The following is combined with Figures 1 to 11 This utility model is described in detail.

[0037] First embodiment:

[0038] like Figures 1 to 7 As shown, this utility model provides an airtightness testing device, particularly an airtightness testing device for a charging gun head. In this embodiment, the airtightness testing device mainly includes a splicing mold 1, a locking component 2, a snap-fit ​​post 3, a frame 4, a lifting platform 6, and an airtightness testing instrument 17. Figure 1 As shown, an airtightness tester 17 is installed on the side of the frame 4. The airtightness tester 17 is used for evacuation and pressurization to test the airtightness of the charging gun head. Inside the frame 4, there is a liftable lifting platform 6. A guide rod 15 is installed at each of the four corners of the inside of the frame 4. The guide rod 15 passes through the lifting platform 6. A sleeve 16 is fixedly connected to each of the four corners of the top surface of the lifting platform 6. The lifting platform 6 moves up and down along the guide rod 15 through the sleeve 16.

[0039] like Figure 4 and Figure 5As shown, a cylinder 5 is fixedly connected to the top of the frame 4. The output end of the cylinder 5 passes through the surface of the frame 4 and the lifting carrier plate 6 and is fixedly connected together. The lifting carrier plate 6 is moved by the cylinder 5. A fixed half-shell 102 is provided on the inner surface of the frame 4, and a movable half-shell 101 is provided on the bottom surface of the lifting carrier plate 6, which moves and rises together with the lifting carrier plate 6. Both the movable half-shell 101 and the fixed half-shell 102 are provided with a bearing mold 103 inside, and the half-shell and the bearing mold 103 are fitted together as a set. The bearing mold 103 is replaceable and can hold the gun heads of different shapes of charging guns. Sealing strips 104 are provided on the side where the two half-shells are in contact with each other. After the two half-shells are completely spliced ​​together, the two sealing strips 104 increase the sealing of the bearing mold 103 inside the half-shell after splicing. Four snap-fit ​​posts 3 are fixedly connected to the two half-shells on opposite sides. The cross-section of the snap-fit ​​posts 3 is T-shaped, with the larger diameter circle on the side furthest from the connection end, which is designated as snap-fit ​​part 301.

[0040] The bottom surface of the lifting platform 6 and the inner bottom surface of the frame 4 are provided with locking posts 201 arranged in a square. The locking posts 201 are rotatably connected to the frame 4 and the lifting platform 6. The side wall surface of the locking posts 201 has grooves to facilitate rotation. A C-shaped first locking block 202 is fixedly connected to the end of the locking posts 201 away from the rotatable connection end. A second locking block 203, also C-shaped, is fixedly connected to the end of the first locking block 202 away from the locking posts 201. The openings of the first locking block 202 and the second locking block 203 face the same direction, and the center of the openings of the two blocks is semi-circular and concentric. The inner diameter of the opening of the first locking block 202 is larger than the inner diameter of the opening of the second locking block 203. The first locking block 202 locks the locking part 301 of the locking post 3 through the protruding part of the second locking block 203 inside, thereby locking and fixing the locking part 2 to the half shell, which facilitates the replacement of different bearing molds 103.

[0041] When the openings of the four locking parts 2 on the lifting platform 6 are all facing the same direction, the movable half-shell 101 can be moved along the opening of the locking part 2 and the movable half-shell 101 can be disassembled. Similarly, when the openings of the four locking parts 2 at the bottom of the frame 4 are all facing the same direction, the fixed half-shell 102 can be moved out along the opening of the locking part 2 and the fixed half-shell 102 can be disassembled. In this way, the two bearing molds 103 can be replaced, which is convenient for testing the airtightness of charging gun heads of different shapes.

[0042] To facilitate the airtightness tester 17, the sealed cavity 19 formed between the two supporting molds 103 and the charging gun head is subjected to negative pressure evacuation and positive pressure inflation to test the airtightness of the charging gun head. A vent pipe 8 is fixedly connected to the middle of the top of the movable half-shell 101, and the interior of the vent pipe 8 is connected to the interior of the sealed cavity 19. A connecting plug 7 is provided at the connection between the lifting plate 6 and the output end of the cylinder 5. The air supply pipe at the lower end of the connecting plug 7 extends from the lifting plate 6 and can connect with the vent pipe 8. When the movable half-shell 101 is locked onto the lifting plate 6, the top end of the vent pipe 8 and the bottom end of the air supply pipe of the connecting plug 7 can connect. To prevent the connection between the vent pipe 8 and the gas supply pipe from affecting the sealing performance after they are aligned, this invention includes a sealing ring 9 fitted onto the vent pipe 8. The sealing ring 9 moves up and down along the axial direction of the vent pipe 8, and when it reaches the top of the vent pipe 8, it positions and blocks the sealing ring 9. The sealing ring 9 also seals the connection between the vent pipe 8 and the gas supply pipe. Furthermore, sealing coatings such as paraffin wax or sealing oil are used to further seal the gaps above and below the sealing ring 9, ensuring the airtightness of the gas supply.

[0043] In the specific implementation of this utility model, firstly, a suitable carrier mold 103 is selected for the charging gun whose airtightness needs to be measured. The carrier mold 103 is installed inside the half shell. First, the fixed half shell 102 with the carrier mold 103 installed is moved to the bottom of the frame 4. The opening of the locking member 2 faces the fixed half shell 102. Then, the locking post 3 at the bottom of the fixed half shell 102 is used to lock the first locking block 202 of the locking member 2 through the locking part 301. Next, two of the locking members 2 are rotated so that the opening faces the other side, so that the fixed half shell 102 has no movement. The fixed half shell 102 is locked and fixed. The moving half shell 101 is also locked and fixed using the same operation method. Next, the charging gun is aligned with the shape of the supporting mold 103 and fitted into the interior of the supporting mold 103 of the fixed half-shell 102. The cylinder 5 is extended and retracted via a switch at the bottom of the frame 4, causing the lifting plate 6 to descend. The moving half-shell 101 descends until it is flush with the fixed half-shell 102, thus closing the supporting molds 103 inside the two half-shells. The airtightness tester 17 performs airtightness testing on the charging gun head through two stages: inflation and deflation. When airtightness testing is required for charging guns of other shapes, the opening of the locking member 2 is rotated to face the same direction, and the half-shell is moved out along the direction of the opening for disassembly and replacement.

[0044] Second embodiment:

[0045] like Figures 8-11As shown, based on the first embodiment, in order to enhance the positioning function of the locking member 2 after rotation, this utility model provides two mounting slots 11 at the end of the locking post 201 away from the first latch block 202. The mounting slots 11 are arranged along the opening direction on the locking member 2 and are symmetrically arranged about the rotation axis of the locking post 201. A positioning spring 13 is provided inside each mounting slot 11, and a positioning ball 12 is provided at the opening of each mounting slot 11. The positioning spring 13 pushes the positioning ball 12 outward from the mounting slot 11, and the opening of the mounting slot 11 is narrowed to prevent the positioning ball 12 from being completely squeezed out. Positioning slots 14 for use with the positioning ball 12 are provided at the bottom of the lifting plate 6 and the bottom of the frame 4. When the positioning ball 12 is engaged inside the positioning slot 14, the opening on the locking member 2 faces or moves away from the cable connection end of the charging gun head on the half shell.

[0046] Furthermore, as the lifting platform 6 lifts and lowers, it drives the movable half-shell 101 to lift and lower. The fixed half-shell 102 inside the frame 4 serves as the bearing part of the movable half-shell 101. In order to increase the bearing capacity and support stability of the frame 4 for the fixed half-shell 102, this utility model has a pad support part 18 fixedly connected to the outer bottom surface of the fixed half-shell 102. After the fixed half-shell 102 is locked on the frame 4, the bottom surface of the pad support part 18 just contacts the bottom surface inside the frame 4, forming support for the fixed half-shell 102. The air tightness tester 17 performs two stages of air filling and air evacuation tests on the sealed cavity 19 formed between the bearing mold 103 and the charging gun after the mold is closed. The test results are displayed on the screen of the air tightness tester 17.

[0047] In summary, the charging gun head airtightness detection device of this utility model has the following advantages:

[0048] I. The airtightness testing device for the charging gun head mainly includes: splicing mold 1, locking part 2, locking pin 3, frame 4, lifting carrier plate 6, and airtightness tester 17. The rotatable locking part 2 can disassemble and lock the half shell containing the carrying mold 103 by using the same or different opening directions, which facilitates the replacement of molds according to different charging gun shapes. Moreover, after locking, the center of the opening of the locking part 2 and the pin 3 on the half shell are in the same position, which can improve the accuracy of mold closing.

[0049] 2. A vent pipe 8 is provided at the top of the external part of the movable half shell 101. After the movable half shell 101 is locked and positioned, the vent pipe 8 can be connected to the air supply pipe of the connecting plug 7 of the lifting plate 6. The sealing ring 9 on the vent pipe 8 is pushed up by the compression spring 10 to seal the connection between the vent pipe 8 and the air supply pipe. With the help of the sealing material, the vent pipe 8 can be used to ensure the evacuation and inflation of the sealed cavity 19 between the mold and the charging gun while the mold is being replaced.

[0050] The air tightness tester 17 used in the equipment to test the air tightness of the charging gun is existing technology and is not an improvement technology point in this case, so it will not be described in detail here.

[0051] In the description of this utility model, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium, and they can be internal connections between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for detecting the airtightness of a charging gun head, characterized in that, include: The splicing mold (1) includes a movable half shell (101) and a fixed half shell (102) that can be spliced. Both the movable half shell (101) and the fixed half shell (102) are provided with a bearing mold (103). Several evenly distributed snap-fit ​​posts (3) are fixed on the side of the half shell that is far away from each other. The end of the snap-fit ​​post (3) that is far away from the half shell is set as a snap-fit ​​part (301). The locking component (2) includes a locking post (201) disposed on the side of the half shell that is far apart from each other. A C-shaped first locking block (202) is fixedly connected to the side of the locking post (201) that is close to the half shell. A second locking block (203) is fixedly connected to the end of the first locking block (202) that is far away from the locking post (201). The opening directions of the first locking block (202) and the second locking block (203) are the same and are configured such that the opening directions of the locking blocks are the same for half shell disassembly and the opening directions of the locking blocks are different for half shell locking.

2. The charging gun head airtightness testing device according to claim 1, characterized in that, The center of the opening of the card block is a concentric semicircle. The inner diameter of the first card block (202) is larger than the inner diameter of the second card block (203). After the movable half shell (101) and the fixed half shell (102) are combined, they support the mold (103) for mold closing. The first card block (202) is used to lock the carding part (301), and the second card block (203) is used to lock the thin end of the carding post (3).

3. The charging gun head airtightness testing device according to claim 1, characterized in that, The charging gun head airtightness testing device also includes a frame (4), a cylinder (5) is fixedly connected to the top of the frame (4), a lifting plate (6) is provided inside the frame (4), the output end of the bottom of the cylinder (5) is fixedly connected to the top of the lifting plate (6), the movable half shell (101) is located on the bottom surface of the lifting plate (6), the lifting plate (6) is used to carry the movable half shell (101) to lift and lower, the fixed half shell (102) is located at the bottom inside the frame (4), and sealing strips (104) are provided on the side of the movable half shell (101) and the fixed half shell (102) that are close to each other.

4. The charging gun head airtightness testing device according to claim 3, characterized in that, The locking pins (201) on the movable half shell (101) are located at the four corners of the bottom surface of the lifting plate (6), and the locking pins (201) on the fixed half shell (102) are located at the four corners of the bottom surface inside the frame (4). The other end of the locking pin (201) with the first locking block (202) is rotatably connected to the frame (4) and the lifting plate (6) respectively.

5. The charging gun head airtightness testing device according to claim 3, characterized in that, A connecting plug (7) is provided between the output end of the lifting plate (6) and the cylinder (5). The air supply pipe at the bottom of the connecting plug (7) extends to the bottom of the lifting plate (6). A vent pipe (8) is fixedly connected to the top of the movable half shell (101). The vent pipe (8) and the air supply pipe at the bottom of the connecting plug (7) are compatible.

6. The charging gun head airtightness testing device according to claim 5, characterized in that, A sealing ring (9) is fitted on the vent pipe (8), and a compression spring (10) is provided at the bottom of the sealing ring (9). The sealing ring (9) is configured such that after the vent pipe (8) and the air supply pipe of the connecting plug (7) are aligned, the compression spring (10) pushes up the sealing ring (9) to seal the connection. The compression spring is fitted on the vent pipe (8).

7. The charging gun head airtightness testing device according to claim 3, characterized in that, The locking pin (201) has two mounting slots (11) symmetrical about its axis of rotation at the end away from the first locking block (202). Each mounting slot (11) is provided with a positioning ball (12) and a positioning spring (13). The positioning spring (13) is used to press the positioning ball (12) out of the mounting slot (11). The bottom of the lifting plate (6) and the bottom of the frame (4) are provided with positioning slots (14) arranged along the opening direction of the first locking block (202). The positioning slots (14) and the positioning balls (12) are compatible.

8. The charging gun head airtightness testing device according to claim 3, characterized in that, Guide rods (15) are provided at the four corners of the frame (4). The guide rods (15) pass through the lifting plate (6). The four corners of the top surface of the lifting plate (6) are fixedly connected with sleeves (16) that are used in conjunction with the guide rods (15). The lifting plate (6) moves up and down along the guide rods (15) through the sleeves (16).

9. The charging gun head airtightness testing device according to claim 3, characterized in that, An airtightness tester (17) is provided on the side of the frame (4). A padding support (18) is fixedly connected to the bottom of the fixed half shell (102). The fixed half shell (102) is locked onto the frame (4). The padding support (18) is in contact with the bottom of the frame (4).

10. The charging gun head airtightness testing device according to claim 5, characterized in that, The supporting mold (103) is used to hold the charging gun head and a sealed cavity (19) is formed between the mold and the charging gun head after the mold is closed. The sealed cavity (19) is used for evacuation and depressurization and inflation. The vent pipe (8) is connected to the sealed cavity (19). When the movable half shell (101) is locked on the lifting plate (6), the connecting plug (7) and the vent pipe (8) are aligned and in contact.

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