A waterproof charging gun and its production process

Abstract

The present invention discloses a waterproof charging gun, which includes a main charging gun housing, a charging interface, a PCB assembly module, a power cord assembly, a power cord sheath, and a wire pressing assembly. The integrated PCB assembly module, the power cord assembly, and the wiring positions inside the charging interface are all located inside the main charging gun housing, and then sealed glue is poured to wrap and cover. After the glue solidifies, the wiring positions cannot move or rotate inside the main charging gun housing, ensuring the stability of the wiring positions and improving the protection performance inside the main charging gun housing to IP67, and enhancing the mechanical strength of the charging gun assembly. The present invention also discloses the production process of the waterproof charging gun, which can improve the potting effect, avoid the generation of air bubbles and potting dead corners, and greatly improve the waterproof effect and service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging guns, and particularly relates to a waterproof charging gun and its production process. Background Art

[0002] At present, new energy vehicles have advantages such as low pollution, low energy consumption, and low noise, and are increasingly widely used in life. Charging connection products for new energy vehicles, such as charging guns, have also developed rapidly. For the charging gun products currently on the market, due to the different gun body structures and technical requirements of each manufacturer, the waterproof performance at the gun head is uneven. As a result, when the charging gun is used in harsh conditions such as rain, immersion, waterlogging, dust ingress, and rolling, the protection performance of the gun head fails, leading to internal water ingress and dust ingress, causing damage.

[0003] In the patent No. CN106256594B, a charging gun with high strength and high waterproof structure is disclosed, including an integrally formed gun body, a charging gun head, conductive PIN pins, a cable, a housing, a mechanical lock, and a button. Among them, the charging gun head is arranged at the front end of the gun body, the conductive PIN pins are placed inside the charging gun head, and a sealing material is poured at the end of the conductive PIN pins. After solidification, a sealing layer for sealing the conductive PIN pins is formed. The cable is arranged at the tail of the gun body, the housing is placed above the gun body, and the mechanical lock and the button are installed inside the housing. By pouring liquid soft glue into the conductive PIN pins, a sealing layer is formed after the liquid soft glue solidifies, so as to improve the waterproof performance at the front end.

[0004] However, due to the structural requirements of the charging gun, it necessarily has at least two openings at the front end and the rear end for installing components such as the gun head and the cable. Merely improving the waterproof performance at the front end is difficult to meet the waterproof requirements of the charging gun, and as the use time increases, its waterproof effect will become worse and worse, affecting the use. Summary of the Invention

[0005] The present invention aims to avoid the deficiencies of the prior art and provides a charging gun with waterproof effect.

[0006] The present invention adopts the following technical solutions to solve the technical problems: A waterproof charging gun, comprising a main charging gun housing, a charging interface, a PCB assembly module, a power cord assembly, a power cord sheath, and a wire pressing assembly. The inside of the main charging gun housing is hollow. The main charging gun housing is provided with a front opening, a rear opening, and a top opening. The front opening is arranged at the front of the main charging gun housing, the rear opening is arranged at the rear of the main charging gun housing, and the top opening is arranged at the top of the main charging gun housing. A sealing plug is arranged in the top opening. The charging interface is connected to the PCB assembly module. The PCB assembly module is arranged in the front opening. The power cord assembly is inserted into the rear opening and electrically connected to the PCB assembly module. The wire pressing assembly is connected to the main charging gun housing and cooperates with the rear opening. The power cord sheath is sleeved on the power cord assembly and cooperates with the wire pressing assembly. The main charging gun housing is filled with a sealing glue, and the sealing glue is injected into the main charging gun housing from the rear opening and the top opening.

[0007] In one embodiment, a clamping groove is arranged at the top of the main charging gun housing, the top opening is arranged at the bottom of the clamping groove, the sealing plug comprises a clamping part and a plunger part, the clamping part cooperates with the clamping groove, and the plunger part cooperates with the top opening.

[0008] In one embodiment, the wire pressing assembly comprises two connected wire pressing blocks, the wire pressing blocks are arc-shaped, and the wire pressing assembly surrounds the periphery of the rear opening.

[0009] In one embodiment, the power cord assembly comprises a cable and a three-prong connector. The cable is inserted into the rear opening and extends into the main charging gun housing, and the three-prong connector is arranged outside the main charging gun housing.

[0010] In one embodiment, the power cord sheath is sleeved on the cable. The power cord sheath comprises a plugged part and a protection part which are communicated with each other. The plugged part is inserted into the wire pressing assembly and closes the rear opening. The protection part is frustum-shaped, the bottom surface of the protection part with a larger area is connected to the plugged part, and a limiting ring is arranged on the plugged part, and there is a gap between the limiting ring and the protection part.

[0011] In one embodiment, a waterproof assembly is sleeved on the charging interface. The waterproof assembly comprises a waterproof sleeve, a connecting handle, and a connecting ring. The waterproof sleeve cooperates with the charging interface. The connecting handle is arranged between the waterproof sleeve and the connecting ring. The connecting ring is sleeved on the plugged part and is located between the limiting ring and the protection part.

[0012] Meanwhile, the production process of the waterproof charging gun provided by the present invention comprises the following steps:

[0013] S1: Cleaning. Use flowing clear water to clean the inside of the main housing of the charging gun. Inject clear water through the front opening, rear opening, and top opening respectively and clean for 10 - 15 seconds. After cleaning, blow dry with cold air for standby.

[0014] S2: Pretreatment. Seal the front opening and the top opening. Inject glycerol into the main housing of the charging gun through the rear opening until the internal space of the main housing of the charging gun is filled with glycerol. Then pour out the glycerol evenly so that a layer of glycerol film is adsorbed on the inner surface of the main housing of the charging gun.

[0015] S3: Prepare the sealing glue. Pour the sealing glue into the vacuum tank evenly while stirring the sealing glue in the vacuum tank until all the glue is poured in. Then continue stirring for 3 - 5 minutes, and then evacuate the vacuum tank to obtain the usable sealing glue.

[0016] S4: Assembly. Assemble the charging interface, PCB assembly module, and power cord assembly onto the main housing of the charging gun. Slip the power cord sheath onto the cable, and complete the wiring inside the main housing of the charging gun to form a semi - finished product.

[0017] S5: Glue injection. Pour the sealing glue obtained in S3 into the main housing of the charging gun obtained in S4. The glue injection flow rate is 5 - 25 g / s until the inside of the main housing of the charging gun is filled with the sealing glue to complete the glue injection.

[0018] S6: Fixing. Assemble the wire pressing component onto the main housing of the charging gun obtained in S5, and slide the power cord sheath to install it inside the wire pressing component for fixing to obtain a waterproof charging gun.

[0019] In one embodiment, S5 specifically includes the following steps: S5.1: Place the main housing of the charging gun vertically with the rear opening facing up. Then pour the sealing glue into the main housing of the charging gun from the side opening. The glue injection flow rate is 5 - 15 g / s. Stop pouring the glue until the sealing glue overflows from the top opening, and then insert the sealing plug into the top opening for sealing and fixing. Then shake the main housing of the charging gun. The shaking time is 15 - 30 seconds and the shaking speed is 1 circle / s to complete the initial glue injection. S5.2: After the initial glue injection is completed, pour the sealing glue into the main housing of the charging gun from the top opening. The glue injection flow rate is 10 - 25 g / s until the main housing of the charging gun is filled with the sealing glue to complete the glue injection operation.

[0020] In one embodiment, S4 further includes the following sub - steps: S4.1 After slipping the power cord sheath onto the cable and before completing the wiring inside the main housing of the charging gun, assemble the waterproof component onto the power cord sheath for fixing.

[0021] In the present invention, the integrated PCB assembly module, the wiring positions inside the power cord assembly and the charging interface are all located inside the main housing of the charging gun, and then sealed glue is poured in to wrap and cover. After the glue solidifies, the wiring positions cannot move or rotate inside the main housing of the charging gun, ensuring the stability of the wiring positions and improving the protection performance inside the main housing of the charging gun to IP67, and enhancing the mechanical strength of the overall charging gun assembly.

[0022] In the present invention, glycerol is used to form a glycerol film inside the main housing of the charging gun, which can improve the flow of the sealed glue on the inner wall of the housing when injecting the glue, improve the filling effect of the glue, and reduce the generation of dead corners.

[0023] In the present invention, through the arrangement of the rear opening and the top opening, the overall glue injection is divided into two steps. If the glue is directly injected from one direction, blockage and air bubbles are likely to occur. By adopting a two-step glue injection process, first ensure the glue injection for the internal structure of the front opening part, and then inject from the rear opening. This can not only improve the glue injection effect, reduce air bubbles, but also effectively reduce the generation of dead corners, enabling the glue to fill the inside of the main housing of the charging gun and ensuring the waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are only for the purpose of illustrating the selected embodiments and do not represent all possible embodiments, and should not be considered as a limitation on the scope of the present invention.

[0025] Figure 1 Schematically shows the overall structure of a waterproof charging gun according to an embodiment of the present invention;

[0026] Figure 2 Schematically shows the partial exploded structure of a waterproof charging gun according to an embodiment of the present invention;

[0027] Figure 3 Schematically shows the overall structure of the main housing of a waterproof charging gun according to an embodiment of the present invention;

[0028] Figure 4 Schematically shows the sectional structure of the main housing of a waterproof charging gun according to an embodiment of the present invention;

[0029] Figure 5 Schematically shows the overall structure of the waterproof component of a waterproof charging gun according to an embodiment of the present invention;

[0030] Figure 6 Schematically shows the overall structure of the power cord sheath of a waterproof charging gun according to an embodiment of the present invention.

[0031] Figure 7 Schematically shows the overall structure of the wire pressing component of a waterproof charging gun according to an embodiment of the present invention.

[0032] Figure 8 Schematically shows a cross-sectional structure of a sealing plug of a waterproof charging gun according to an embodiment of the present invention. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0035] The terms used herein are intended to explain the embodiments and are not intended to limit and / or define the present invention. It should be understood that the orientation or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", etc. are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships when the inventive product is normally placed, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0036] Next, with reference to Figures 1 to 8 , the preferred implementation manners according to the present invention will be described in detail.

[0037] Figure 1 Is a schematic diagram of the overall three-dimensional structure of this waterproof charging gun.

[0038] Figure 2 Is a schematic diagram of a partial exploded state of this waterproof charging gun.

[0039] Figure 3 Is a schematic diagram of the overall three-dimensional structure of the main housing of this waterproof charging gun.

[0040] Figure 4 Is a schematic diagram of the overall cross-sectional structure of the main housing of this waterproof charging gun.

[0041] Figure 5 Is a schematic diagram of the overall structure of the waterproof component of this waterproof charging gun.

[0042] Figure 6 Is a schematic diagram of the overall three-dimensional structure of the power cord sheath of this waterproof charging gun.

[0043] Figure 7 This is a three-dimensional structural schematic diagram of the connection state of the wire pressing assembly of the waterproof charging gun.

[0044] Figure 8 This is a cross-sectional structural schematic diagram of the sealing plug of the waterproof charging gun.

[0045] Embodiment 1

[0046] The waterproof charging gun according to an embodiment of the present invention mainly includes a charging gun main housing 100, a charging interface 200, a PCB assembly module 300, a power cord assembly 400, a power cord sheath 500, and a wire pressing assembly 600. Compared with the components of other brands in the field, these components may have different structures, but the functions they achieve are the same. For example, the charging gun main housing is used to accommodate other components, the charging interface is matched with the charging port of the vehicle body, the PCB assembly module is electrically connected to the power cord assembly and connected to the charging interface to achieve the charging effect, and the power cord sheath and the wire pressing assembly are used to enclose the structure of the charging gun main housing.

[0047] In this embodiment, the inside of the charging gun main housing 100 is hollow. The charging gun main housing 100 is provided with a front side opening 1000, a rear side opening 2000, and a top side opening 3000. The front side opening 1000 is arranged at the front of the charging gun main housing 100, the rear side opening 2000 is arranged at the rear of the charging gun main housing 100, the top side opening 3000 is arranged at the top of the charging gun main housing 100, and a sealing plug 310 is arranged in the top side opening 3000. The charging interface 200 is connected to the PCB assembly module 300. The PCB assembly module 300 is arranged in the front side opening 1000. The power cord assembly 400 is inserted into the rear side opening 2000 and is electrically connected to the PCB assembly module 300. The wire pressing assembly 600 is connected to the charging gun main housing 100 and is matched with the rear side opening 2000. The power cord sheath 500 is sleeved on the power cord assembly 400 and is matched with the wire pressing assembly 600. The charging gun main housing 100 is filled with a sealing glue, and the sealing glue is injected into the charging gun main housing 100 from the rear side opening 2000 and the top side opening 3000.

[0048] Specifically, a card slot 110 is provided at the top of the main housing 100 of the charging gun. The top-side opening 3000 is provided at the bottom of the card slot 110. The top-side opening is in the shape of a cylindrical hole and is located above the PCB assembly module (when the rear-side opening of the main housing of the charging gun is placed upward), which is convenient for potting. The sealing plug 310 includes a clamping portion 311 and a plunger portion 312. The clamping portion 311 cooperates with the card slot 110, and the plunger portion 312 cooperates with the top-side opening 3000. The card slot is in the shape of a rectangular block, and the corresponding clamping portion is in the shape of a rectangular block and just fits into the card slot. The plunger portion just inserts into the top-side opening and partially extends into the main housing of the charging gun to ensure the sealing effect.

[0049] Among them, the wire pressing assembly 600 includes two connected wire pressing blocks 610. The wire pressing blocks 610 are in an arc shape. The wire pressing assembly 600 surrounds the rear-side opening 2000. The wire pressing assembly is a conventional accessory in the field and is not limited herein.

[0050] Specifically, the power cord assembly 400 includes a cable 410 and a three-prong connector 420. The cable 410 is inserted into the rear-side opening 2000 and extends into the main housing 100 of the charging gun. The three-prong connector 420 is provided outside the main housing 100 of the charging gun. The power cord assembly is a conventional accessory in the field and is not limited herein.

[0051] Specifically, the power cord sheath 500 is sleeved on the cable 410. The power cord sheath 500 includes a plug-in portion 510 and a protection portion 520 that are connected. The plug-in portion 510 is inserted into the wire pressing assembly 600 and closes the rear-side opening 2000. The protection portion 520 is in a frustum shape. The bottom surface of the protection portion 520 with a larger area is connected to the plug-in portion 510. A limiting ring 530 is provided on the plug-in portion 510, and there is a gap between the limiting ring 530 and the protection portion 520.

[0052] Specifically, a waterproof assembly is sleeved on the charging interface 200. The waterproof assembly includes a waterproof sleeve 910, a connecting handle 920, and a connecting ring 930. The waterproof sleeve 910 cooperates with the charging interface 200. The connecting handle 920 is provided between the waterproof sleeve 910 and the connecting ring 930. The connecting ring 930 is sleeved on the plug-in portion 510 and is located between the limiting ring 530 and the protection portion 520. The waterproof sleeve is equivalent to a cover and directly covers the charging interface for protection. The waterproof sleeve can be removed for use. The connecting ring is used to limit the connecting handle, and the connecting handle is used to connect the waterproof sleeve.

[0053] Embodiment 2

[0054] The production process of the waterproof charging gun in this embodiment mainly includes the following steps:

[0055] S1: Cleaning. Use flowing clean water to clean the inside of the charging gun main housing 100. Inject clean water through the front opening 1000, rear opening 2000, and top opening 3000 respectively and clean for 15 s. After cleaning, blow dry with cold air for standby, making the inside of the charging gun main housing clean and facilitating the injection and film formation of glycerol.

[0056] S2: Pretreatment. Seal the front opening 1000 and top opening 3000. Inject glycerol into the charging gun main housing 100 through the rear opening 2000 until the internal space of the charging gun main housing 100 is filled with glycerol. Then pour out the glycerol evenly, so that a layer of glycerol film is adsorbed on the inner surface of the charging gun main housing 100.

[0057] S3: Prepare the sealing glue. Pour the sealing glue into the vacuum tank evenly, and stir the sealing glue in the vacuum tank at the same time until all the glue is poured in. Then continue to stir for 5 min, and then evacuate the vacuum tank to obtain the usable sealing glue.

[0058] S4: Assembly. Assemble the charging interface 200, PCB assembly module 300, and power cord assembly 400 onto the charging gun main housing 100. Put the power cord sheath 500 onto the cable 410, and complete the wiring inside the charging gun main housing 100 to form a semi-finished product. After putting the power cord sheath 500 onto the cable 410 and before completing the wiring inside the charging gun main housing 100, assemble the waterproof component onto the power cord sheath 500 for fixation.

[0059] S5: Glue injection. Pour the sealing glue obtained in S3 into the charging gun main housing 100 obtained in S4, and pour it in from the rear opening. The glue injection flow rate is 5 g / s until the inside of the charging gun main housing 100 is filled with the sealing glue to complete the glue injection.

[0060] S6: Fixation. Assemble the wire pressing component 600 onto the charging gun main housing 100 obtained in S5, and slide the power cord sheath 500 and install it into the wire pressing component 600 for fixation to obtain a waterproof charging gun.

[0061] Example 3

[0062] The production process of the waterproof charging gun in this example mainly includes the following steps:

[0063] S1: Cleaning. Use flowing clean water to clean the inside of the charging gun main housing 100. Inject clean water through the front opening 1000, rear opening 2000, and top opening 3000 respectively and clean for 15 s. After cleaning, blow dry with cold air for standby, making the inside of the charging gun main housing clean and facilitating the injection and film formation of glycerol.

[0064] S2: Pretreatment. Seal the front opening 1000 and the top opening 3000, inject glycerol into the main housing 100 of the charging gun through the rear opening 2000 until the internal space of the main housing 100 of the charging gun is filled with glycerol, and then pour out the glycerol at a uniform speed so that a layer of glycerol film is adsorbed on the inner surface of the main housing 100 of the charging gun.

[0065] S3: Prepare the sealing glue. Pour the sealing glue into the vacuum tank at a uniform speed, and stir the sealing glue in the vacuum tank at the same time until all the glue is poured in, then continue to stir for 5 minutes, and then evacuate the vacuum tank to obtain the available sealing glue.

[0066] S4: Assembly. Assemble the charging interface 200, the PCB assembly module 300 and the power cord assembly 400 onto the main housing 100 of the charging gun, put the power cord sheath 500 onto the cable 410, and complete the wiring inside the main housing 100 of the charging gun to form a semi-finished product. And after putting the power cord sheath 500 onto the cable 410 and before completing the wiring inside the main housing 100 of the charging gun, assemble the waterproof component onto the power cord sheath 500 for fixation.

[0067] S5: Glue injection. Pour the sealing glue obtained in S3 into the main housing 100 of the charging gun obtained in S4, and pour it in from the rear opening. The glue injection flow rate is 15 g / s until the sealing glue fills the inside of the main housing 100 of the charging gun to complete the glue injection.

[0068] S6: Fixation. Assemble the wire pressing component 600 onto the main housing 100 of the charging gun obtained in S5, and slide the power cord sheath 500 to install it inside the wire pressing component 600 for fixation to obtain the waterproof charging gun.

[0069] Example 4

[0070] The production process of the waterproof charging gun in this example mainly includes the following steps:

[0071] S1: Cleaning. Clean the inside of the main housing 100 of the charging gun with flowing clean water, inject clean water from the front opening 1000, the rear opening 2000 and the top opening 3000 respectively and clean for 15 s. After cleaning, dry it with cold air for standby, so that the inside of the main housing of the charging gun is clean and convenient for glycerol injection and film formation.

[0072] S2: Pretreatment. Seal the front opening 1000 and the top opening 3000, inject glycerol into the main housing 100 of the charging gun through the rear opening 2000 until the internal space of the main housing 100 of the charging gun is filled with glycerol, and then pour out the glycerol at a uniform speed so that a layer of glycerol film is adsorbed on the inner surface of the main housing 100 of the charging gun.

[0073] S3: Prepare the sealing glue, pour the sealing glue into the vacuum tank at a uniform speed, and stir the sealing glue in the vacuum tank at the same time until all the glue is poured in. Then continue to stir for 5 minutes, and then evacuate the vacuum tank to obtain the usable sealing glue.

[0074] S4: Assembly. Assemble the charging interface 200, the PCB assembly module 300, and the power cord assembly 400 onto the main charging gun housing 100. Then put the power cord sheath 500 onto the cable 410, and complete the wiring inside the main charging gun housing 100 to form a semi-finished product. After putting the power cord sheath 500 onto the cable 410 and before completing the wiring inside the main charging gun housing 100, assemble the waterproof component onto the power cord sheath 500 for fixation.

[0075] S5: Glue injection. Pour the sealing glue obtained in S3 into the main charging gun housing 100 obtained in S4, and pour it in from the rear opening. The glue injection flow rate is 25 g / s until the sealing glue fills the inside of the main charging gun housing 100 to complete the glue injection.

[0076] S6: Fixation. Assemble the wire pressing component 600 onto the main charging gun housing 100 obtained in S5, and slide the power cord sheath 500 and install it inside the wire pressing component 600 for fixation to obtain the waterproof charging gun.

[0077] Example 5

[0078] The production process of the waterproof charging gun in this example mainly includes the following steps:

[0079] S1: Cleaning. Clean the inside of the main charging gun housing 100 with flowing clean water. Inject clean water from the front opening 1000, the rear opening 2000, and the top opening 3000 respectively and clean for 15 seconds. After cleaning, dry it with cold air for standby, making the inside of the main charging gun housing clean and convenient for the injection of glycerin to form a film.

[0080] S2: Pretreatment. Seal the front opening 1000 and the top opening 3000, inject glycerin into the main charging gun housing 100 through the rear opening 2000 until the inside space of the main charging gun housing 100 is filled with glycerin, and then pour out the glycerin at a uniform speed so that a layer of glycerin film is adsorbed on the inner surface of the main charging gun housing 100.

[0081] S3: Prepare the sealing glue, pour the sealing glue into the vacuum tank at a uniform speed, and stir the sealing glue in the vacuum tank at the same time until all the glue is poured in. Then continue to stir for 5 minutes, and then evacuate the vacuum tank to obtain the usable sealing glue.

[0082] S4: Assembly. Assemble the charging interface 200, the PCB assembly module 300, and the power cord assembly 400 onto the main charging gun housing 100. Slip the power cord sheath 500 over the cable 410, and complete the wiring inside the main charging gun housing 100 to form a semi-finished product. After slipping the power cord sheath 500 over the cable 410 and before completing the wiring inside the main charging gun housing 100, assemble the waterproof component onto the power cord sheath 500 for fixation.

[0083] S5: It includes S5.1 and S5.2.

[0084] S5.1: Vertically place the main charging gun housing 100 so that the rear opening 2000 faces upward. Then, pour the sealing glue into the main charging gun housing 100 from the side opening at a pouring rate of 5 g / s. Stop pouring when the sealing glue overflows from the top opening. Then, insert the sealing plug 310 into the top opening 3000 for sealing and fixation. Then, shake the main charging gun housing 100 for 20 s at a shaking speed of 1 circle / s to evenly mix the glue inside the head of the main charging gun housing and ensure the connection strength, thus completing the initial glue pouring.

[0085] S5.2: After the initial glue pouring is completed, pour the sealing glue into the main charging gun housing 100 from the top through the top opening 3000 at a pouring rate of 10 g / s until the main charging gun housing 100 is filled with the sealing glue, thus completing the glue pouring operation.

[0086] S6: Fixation. Assemble the wire pressing component 600 onto the main charging gun housing 100 obtained in S5, and slide the power cord sheath 500 to install it inside the wire pressing component 600 for fixation, thus obtaining a waterproof charging gun.

[0087] Embodiment 6

[0088] The production process of the waterproof charging gun in this embodiment mainly includes the following steps:

[0089] S1: Cleaning. Clean the inside of the main charging gun housing 100 with flowing clean water. Inject clean water through the front opening 1000, the rear opening 2000, and the top opening 3000 respectively and clean for 15 s. After cleaning, dry it with cold air for standby, making the inside of the main charging gun housing clean and facilitating the injection and film formation of glycerol.

[0090] S2: Pretreatment. Seal the front opening 1000 and the top opening 3000. Inject glycerol into the main charging gun housing 100 through the rear opening 2000 until the internal space of the main charging gun housing 100 is filled with glycerol. Then, pour out the glycerol evenly so that a layer of glycerol film is adsorbed on the inner surface of the main charging gun housing 100.

[0091] S3: Prepare the sealing glue, pour the sealing glue into the vacuum tank at a uniform speed, and stir the sealing glue in the vacuum tank at the same time until all the glue is poured. Then continue to stir for 5 minutes, and then evacuate the vacuum tank to obtain the usable sealing glue.

[0092] S4: Assembly. Assemble the charging interface 200, the PCB assembly module 300, and the power cord assembly 400 onto the main charging gun housing 100. Slip the power cord sheath 500 over the cable 410, and complete the wiring inside the main charging gun housing 100 to form a semi-finished product. After slipping the power cord sheath 500 over the cable 410 and before completing the wiring inside the main charging gun housing 100, assemble the waterproof component onto the power cord sheath 500 for fixation.

[0093] S5: It includes S5.1 and S5.2.

[0094] S5.1: Place the main charging gun housing 100 vertically with the rear opening 2000 facing upwards. Then pour the sealing glue into the main charging gun housing 100 from the side opening at a pouring rate of 10 g / s. Stop pouring when the sealing glue overflows from the top opening, and insert the sealing plug 310 into the top opening 3000 for sealing and fixation. Then shake the main charging gun housing 100 for 20 seconds at a shaking speed of 1 circle per second to evenly mix the glue inside the head of the main charging gun housing and ensure the connection strength, thus completing the initial glue pouring.

[0095] S5.2: After the initial glue pouring is completed, pour the sealing glue into the main charging gun housing 100 from the top through the top opening 3000 at a pouring rate of 20 g / s until the main charging gun housing 100 is filled with the sealing glue, thus completing the glue pouring operation.

[0096] S6: Fixation. Assemble the wire pressing component 600 onto the main charging gun housing 100 obtained in S5, and slide the power cord sheath 500 and install it inside the wire pressing component 600 for fixation to obtain the waterproof charging gun.

[0097] Example 7

[0098] The production process of the waterproof charging gun in this example mainly includes the following steps:

[0099] S1: Cleaning. Clean the inside of the main charging gun housing 100 with flowing clean water. Inject clean water from the front opening 1000, the rear opening 2000, and the top opening 3000 respectively and clean for 15 seconds. After cleaning, dry it with cold air for later use to make the inside of the main charging gun housing clean and convenient for the injection and film formation of glycerol.

[0100] S2: Pretreatment. Seal the front opening 1000 and the top opening 3000, inject glycerol into the main housing 100 of the charging gun through the rear opening 2000 until the internal space of the main housing 100 of the charging gun is filled with glycerol, and then pour out the glycerol at a uniform speed so that a layer of glycerol film is adsorbed on the inner surface of the main housing 100 of the charging gun.

[0101] S3: Prepare the sealing glue. Pour the sealing glue into the vacuum tank at a uniform speed, and stir the sealing glue in the vacuum tank at the same time until all the glue is poured in, then continue to stir for 5 minutes, and then evacuate the vacuum tank to obtain the available sealing glue.

[0102] S4: Assembly. Assemble the charging interface 200, the PCB assembly module 300 and the power cord assembly 400 onto the main housing 100 of the charging gun, put the power cord sheath 500 on the cable 410, and complete the wiring inside the main housing 100 of the charging gun to form a semi-finished product. And after putting the power cord sheath 500 on the cable 410 and before completing the wiring inside the main housing 100 of the charging gun, assemble the waterproof component onto the power cord sheath 500 for fixation.

[0103] S5: It includes S5.1 and S5.2.

[0104] S5.1: Vertically place the main housing 100 of the charging gun so that the rear opening 2000 faces upward, and then pour the sealing glue into the main housing 100 of the charging gun from the side through the side opening at a pouring rate of 15 g / s. Stop pouring the glue until the sealing glue overflows from the top opening, and then plug the sealing plug 310 into the top opening 3000 for sealing and fixation. Then shake the main housing 100 of the charging gun for 20 seconds at a shaking speed of 1 circle / s to make the glue inside the head of the main housing 100 of the charging gun evenly mixed and ensure the connection strength to complete the initial glue pouring.

[0105] S5.2: After the initial glue pouring is completed, pour the sealing glue into the main housing 100 of the charging gun from the top through the top opening 3000 at a pouring rate of 25 g / s until the main housing 100 of the charging gun is filled with the sealing glue to complete the glue pouring operation.

[0106] S6: Fixation. Assemble the wire pressing component 600 onto the main housing 100 of the charging gun obtained in S5, and slide the power cord sheath 500 and install it into the wire pressing component 600 for fixation to obtain a waterproof charging gun.

[0107] Test the waterproof charging guns obtained in Examples 2 - 7 respectively according to the GB4208 - 2008 standard for the degree of protection of enclosures, and charging guns with a protection performance up to IP67 are obtained.

[0108] For Examples 2-7 and the comparative example (a conventional waterproof charging gun purchased on the market), the obtained waterproof charging guns were respectively subjected to multiple service life tests in accordance with the GB4208-2008 standard for the degree of protection provided by enclosures. The tests were conducted three times a day to simulate the water ingress scenario under heavy rain weather. Based on the average number of rainy days per year being 122 days (1 / 3 of the annual rainfall time), the test lasted for 400 days, and the following results were obtained:

[0109] Item Test Time (days) Test Result Comparative Example 210 Internal water ingress damage occurred on the 210th day of the test Example 2 310 Internal water ingress damage occurred on the 310th day of the test Example 3 298 Internal water ingress damage occurred on the 298th day of the test Example 4 305 Internal water ingress damage occurred on the 305th day of the test Example 5 381 Internal water ingress damage occurred on the 381st day of the test Example 6 390 Internal water ingress damage occurred on the 390th day of the test Example 7 386 Internal water ingress damage occurred on the 386th day of the test

[0110] According to the above data, it can be concluded that after multiple tests, the waterproof effect of the comparative example was lost, and the test termination time was 210 days. A total of 630 tests were conducted, which is equivalent to 1890 days of use time (630 days of rainfall time within 1890 days).

[0111] However, the service life of Examples 2-7 was significantly longer than that of the comparative example. The fastest damaged Example 3 also experienced 2682 days of use time, far exceeding that of the comparative example. In particular, for Examples 5-7, the service life was greater than 3429 days, and the waterproof effect was very ideal.

[0112] It should be noted that in the present invention, the connection methods not described between components can adopt the commonly used connection methods in the field.

[0113] The scope of the present invention is not limited by the embodiments described above, but is defined by the appended claims and their equivalents.

Claims

1. A production process of a waterproof charging gun, characterized in that, The waterproof charging gun includes a main charging gun housing, a charging interface, a PCB assembly module, a power cord assembly, a power cord sheath, and a wire pressing assembly. The interior of the main charging gun housing is hollow. The main charging gun housing is provided with a front opening, a rear opening, and a top opening. The front opening is arranged at the front of the main charging gun housing. The rear opening is arranged at the rear of the main charging gun housing. The top opening is arranged at the top of the main charging gun housing. A sealing plug is arranged in the top opening. The charging interface is connected to the PCB assembly module. The PCB assembly module is arranged in the front opening. The power cord assembly is inserted into the rear opening and electrically connected to the PCB assembly module. The wire pressing assembly is connected to the main charging gun housing and cooperates with the rear opening. The power cord sheath is sleeved on the power cord assembly and cooperates with the wire pressing assembly. The main charging gun housing is filled with sealing glue, and the sealing glue is injected into the main charging gun housing from the rear opening and the top opening; The production process includes the following steps: S1: Cleaning. Use flowing clean water to clean the interior of the main charging gun housing. Inject clean water from the front opening, the rear opening, and the top opening respectively and clean for 10 - 15S. After cleaning, blow dry with cold air for standby; S2: Pretreatment. Seal the front opening and the top opening. Inject glycerol into the main charging gun housing through the rear opening until the interior space of the main charging gun housing is filled with glycerol. Then pour out the glycerol evenly so that a layer of glycerol film is adsorbed on the inner surface of the main charging gun housing; S3: Prepare the sealing glue. Pour the sealing glue into the vacuum tank evenly. At the same time, stir the sealing glue in the vacuum tank until all the glue is poured in. Then continue to stir for 3 - 5min. Then evacuate the vacuum tank to obtain the usable sealing glue; S4: Assembly. Assemble the charging interface, the PCB assembly module, and the power cord assembly onto the main charging gun housing. Sleeve the power cord sheath onto the cable, and complete the wiring inside the main charging gun housing to form a semi-finished product; S5: Glue injection. Pour the sealing glue obtained in S3 into the main charging gun housing obtained in S4. The glue injection flow rate is 5 - 25g / s until the interior of the main charging gun housing is filled with the sealing glue to complete the glue injection; S5.1: Place the main charging gun housing vertically with the rear opening facing up. Then pour the sealing glue into the main charging gun housing from the side opening. The glue injection flow rate is 5 - 15g / s. Stop glue injection until the sealing glue overflows from the top opening. Then insert the sealing plug into the top opening for sealing and fixing. Then shake the main charging gun housing. The shaking time is 15 - 30S, and the shaking speed is 1 circle / S to complete the initial glue injection; S5.2: After the initial glue injection is completed, pour the sealing glue into the main charging gun housing from the top opening. The glue injection flow rate is 10 - 25g / s until the main charging gun housing is filled with the sealing glue to complete the glue injection operation; S6: Fixing. Assemble the wire pressing assembly onto the main charging gun housing obtained in S5. Slide the power cord sheath and install it into the wire pressing assembly for fixing to obtain the waterproof charging gun.

2. The production process of a waterproof charging gun according to claim 1, characterized in that, A clamping groove is provided at the top of the main housing of the charging gun, the top side opening is arranged at the bottom of the clamping groove, the sealing plug includes a clamping portion and a plunger portion, the clamping portion is matched with the clamping groove, and the plunger portion is matched with the top side opening.

3. The production process of a waterproof charging gun according to claim 2, characterized in that, The wire pressing assembly includes two connected wire pressing blocks, the wire pressing blocks are arc-shaped, and the wire pressing assembly surrounds the rear side opening.

4. The production process of a waterproof charging gun according to claim 3, characterized in that, The power cord assembly includes a cable and a three-prong connector, the cable is inserted into the rear side opening and extends into the main housing of the charging gun, and the three-prong connector is arranged outside the main housing of the charging gun.

5. The production process of a waterproof charging gun according to claim 4, characterized in that, The power cord sheath is sleeved on the cable, the power cord sheath includes a plugging portion and a protecting portion that are communicated with each other, the plugging portion is inserted into the wire pressing assembly and closes the rear side opening, the protecting portion is frustum-shaped, the bottom surface of the protecting portion with a larger area is connected to the plugging portion, a limiting ring is arranged on the plugging portion, and there is a gap between the limiting ring and the protecting portion.

6. The production process of a waterproof charging gun according to claim 5, characterized in that, A waterproof assembly is sleeved on the charging interface, the waterproof assembly includes a waterproof sleeve, a connecting handle and a connecting ring, the waterproof sleeve is matched with the charging interface, the connecting handle is arranged between the waterproof sleeve and the connecting ring, and the connecting ring is sleeved on the plugging portion and is located between the limiting ring and the protecting portion.

7. The production process of a waterproof charging gun according to claim 1, characterized in that, S4 further includes the following sub-steps: S4.1 After the power cord sheath is sleeved on the cable and before the wiring is completed in the main housing of the charging gun, the waterproof assembly is assembled and fixed on the power cord sheath.

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