A production process for charging gun terminals

Abstract

The present invention discloses a charging gun terminal production process in the field of charging guns, comprising the following steps: cutting a hollow metal tube of predetermined length from raw materials, with the two ends of the metal tube marked as end A and end B respectively; rotating a tube reduction jig at high speed along the axial direction of the metal tube and pressing it into the B end of the metal tube until the B end of the metal tube is reduced to a predetermined size; pre-treating the metal tube so that a structure is formed inside the metal tube to facilitate sealing the opening at the B end; further processing and sealing the opening at the B end of the metal tube; preparing a reed, pressing the reed into the interior of the metal tube from the B end of the metal tube, and welding and fixing it. Overall, the entire production process is optimized, avoiding traditional more complicated operations, improving overall production efficiency during the processing, saving more processing time, and in addition, the metal tube does not generate any excess waste during the processing, saving production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of charging guns, and in particular to a production process for charging gun terminals. Background Art

[0002] Charging gun terminals are the metal connectors used to connect and transmit power and signals. Each terminal carries a specific power supply or control signal function to ensure a smooth charging process. Charging gun terminals play a crucial role in the EV charging process, not only transmitting power but also providing communication and control functions.

[0003] With the rapid development of the electric vehicle industry, charging guns, as key equipment for electric vehicle charging, are facing increasing demands for performance and reliability. As a crucial component of charging guns, the quality and production process of charging gun terminals directly impact charging efficiency and safety.

[0004] The production process of traditional charging gun terminals is relatively complicated and usually includes multiple tedious processing steps such as cutting, stamping, drilling, etc. Figure 1-2 As shown in the figure, traditional charging gun terminals are primarily made by turning copper rods. The entire process involves stamping and drilling a metal tube 1, inserting a spring 2 into the hole, and finally pressing a cap 3 into the opening. However, this entire process is not only time-consuming and inefficient, but also prone to waste, increasing production costs. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technical solutions, the present invention provides a charging gun terminal production process, which can effectively solve the technical problems of complex production process and high cost.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A charging gun terminal production process includes the following production steps:

[0008] In the first step, a hollow metal tube of predetermined length is cut from the raw material, and the two ends of the metal tube are marked as end A and end B respectively;

[0009] The second step is to use a dedicated tube reduction jig, which is rotated at high speed along the axial direction of the metal tube and pressed into the B end of the metal tube until the B end of the metal tube is reduced to a predetermined size. The tube reduction jig is provided with a compression groove for pressing into and gradually reducing the B end of the metal tube.

[0010] The third step is to pre-treat the metal tube so that the internal structure of the metal tube is formed to facilitate sealing the opening at end B, which can be done in one of the following two ways:

[0011] Method 1: Using a dedicated cam jig and a first push rod jig, first insert the first push rod jig from end A of the metal tube. Then, press the cam jig down onto the outside of the metal tube and rotate it at least two turns to form a first groove for installing the waterproof ring on the outside of the metal tube and a raised snap ring at the corresponding position on the inner wall of the metal tube.

[0012] Method 2: Use the punching device to punch two holes on the surface of the metal tube;

[0013] Step 4: Further process and seal the opening at end B of the metal tube according to the processing method selected in step 3, wherein:

[0014] If you choose method 1 in step 3, prepare a rubber stopper and press it into the metal tube from end A until it seals the opening at end B of the metal tube. The rubber stopper is fixed in place with a retaining ring.

[0015] If method 2 is selected in step 3, prepare a hollow rubber mold and a second ejector fixture. Insert the metal tube into the rubber mold. Then insert the second ejector fixture from the A end of the metal tube. Insert the glue injection device from the B end of the metal tube and inject the glue. The glue flows out through the two holes to fill the inner wall of the rubber mold. Seal the opening at the B end of the metal tube. Set a second groove on the outside of the rubber mold for installing the waterproof ring.

[0016] The fifth step is to prepare the reed, press the reed into the interior of the metal tube from the B end of the metal tube, and then fix the reed to the A end of the metal tube through laser welding technology.

[0017] Furthermore, the metal tube is made of copper.

[0018] Furthermore, in the second step, when the compression groove is pressed into the B end of the metal tube, the metal tube is uniformly reduced to a predetermined size without deformation.

[0019] Furthermore, in method 1 of the third step, the first push rod jig and the cam jig are used in conjunction to ensure that the size and position of the formed first groove and the retaining ring correspond to each other, so as to meet the installation of the waterproof ring and the limiting function of the retaining ring.

[0020] Furthermore, in the second method of the third step, the two holes are symmetrically arranged.

[0021] Furthermore, after the first step and before the second step, a grinding tool is brought into contact with the surface of the metal pipe to remove burrs on the surface of the metal pipe.

[0022] Furthermore, after the third step and before the fourth step, the surface of the metal pipe is flushed by a flushing tool to remove residual contaminants.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides a process for producing charging gun terminals, which optimizes the entire production steps as a whole, avoids traditional more complicated operations, improves overall production efficiency during the processing, and saves more processing time. In addition, the metal tube will not generate any excess waste during the processing process, saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the charging gun terminal structure in the background technology of the present invention;

[0026] Figure 2 Background technology of the present invention Figure 1 Cross-sectional diagram;

[0027] Figure 3 This is a cross-sectional view of the first step of production of Example 1 and Example 2 of the present invention;

[0028] Figure 4 This is a schematic diagram of the movement direction before production in the second step of Example 1 and Example 2 of the present invention;

[0029] Figure 5 This is a cross-sectional view of the production status of the second step of Example 1 and Example 2 of the present invention;

[0030] Figure 6 This is a schematic diagram of the movement direction before production in the third step of Example 1 of the present invention;

[0031] Figure 7 This is a cross-sectional view of the production state of the third step of Example 1 of the present invention;

[0032] Figure 8 This is a schematic diagram of the movement direction before production in the fourth step of the first embodiment of the present invention;

[0033] Figure 9 This is a cross-sectional view of the production state of the fourth step of Example 1 of the present invention;

[0034] Figure 10 This is a schematic diagram of the movement direction before production in the fifth step of the first embodiment of the present invention;

[0035] Figure 11 This is a cross-sectional view of the production state in the fifth step of Example 1 of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of the metal tube after punching in the third step of the second embodiment of the present invention;

[0037] Figure 13 This is a schematic cross-sectional view of the metal punch after punching in the third step of the second embodiment of the present invention;

[0038] Figure 14 This is a schematic diagram of the movement direction before production in the fourth step of the second embodiment of the present invention;

[0039] Figure 15 This is a cross-sectional view of the production state of the fourth step of the second embodiment of the present invention;

[0040] Figure 16 This is a schematic diagram of the movement direction before production in the fifth step of the second embodiment of the present invention;

[0041] Figure 17 This is a cross-sectional view of the production state of the fifth step of the second embodiment of the present invention;

[0042] Numbers in the figure:

[0043] Figure 1-Figure 2 middle:

[0044] 1-metal tube, 2-reed, 3-cap;

[0045] Figure 3-Figure 11 middle:

[0046] 1-metal tube, 2-tube reduction jig, 3-cam jig, 4-first ejector jig, 5-rubber stopper, 6-reed, 7-hole position, 8-rubber mold, 9-second ejector jig;

[0047] 101-first groove, 102-circlip;

[0048] 201-compression groove;

[0049] 301-ring body;

[0050] 401-annular groove;

[0051] 801-Second groove. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] An embodiment of the present invention provides a charging gun terminal production process, which is mainly used for producing charging gun terminals, optimizes the production process of the charging gun terminals, and can also achieve the effect of cost savings. The production process steps are illustrated by the following two embodiments.

[0054] Example 1:

[0055] like Figure 3-Figure 11 As shown, the production process includes the following steps:

[0056] The first step is to cut a hollow metal tube 1 of a predetermined length from the raw material. The two ends of the metal tube 1 are marked as end A and end B respectively. Among them, the metal tube 1 for producing the charging gun terminal is made of copper. The user can cut the hollow metal tube 1 according to the predetermined length by cutting equipment, and deburr the cut position of the metal tube 1.

[0057] The second step involves using a dedicated tube reduction jig 2, which is rotated at high speed along the axial direction of the metal tube 1 and pressed into the B end of the metal tube 1 until the B end of the metal tube 1 is reduced to a predetermined size. The tube reduction jig 2 is provided with a compression groove 201 for pressing into and gradually reducing the B end of the metal tube 1. As the compression groove 201 of the tube reduction jig 2 is gradually pressed into the B end of the metal tube 1, the B end of the metal tube 1 gradually shrinks along the inner wall of the compression groove 201, uniformly shrinking to the predetermined size without deformation during the reduction process.

[0058] The third step is to use a dedicated cam jig 3 and a first push rod jig 4. First, insert the first push rod jig 4 from the A end of the metal tube 1, then press the cam jig 3 down on the outside of the metal tube 1 and rotate it at least two times to form two semicircular first grooves 101 for installing the waterproof ring on the outside of the metal tube 1, and form two raised retaining rings 102 at corresponding positions on the inner wall of the metal tube 1. The outside of the cam jig 3 is provided with two annular bodies 301 for squeezing the metal tube 1 to form the first grooves 101, and the outside of the first push rod jig 4 is provided with two annular grooves 401 for accommodating the retaining rings 102. It should be noted that when using the first push rod jig 4 and the cam jig 3, the two need to be used in conjunction with each other. Furthermore, when clamping the metal tube 1, the annular body 301 on the outside of the metal tube 1 and the annular groove 401 on the inside of the metal tube 1 are aligned. This allows the cam jig 3 to more easily form the first groove 101 and the retaining ring 102 on the outside and inside of the metal tube 1 as it rotates, ensuring that the first groove 101 can accommodate the waterproof ring and the retaining ring 102 can limit the position. After completion, the metal tube 1 can be cleaned to remove any remaining contaminants on its surface, thereby improving the smoothness of its outer surface.

[0059] The fourth step is to prepare the rubber stopper 5. The rubber stopper 5 is pressed into the interior of the metal tube 1 from the A end until it seals the B end opening of the metal tube 1. The rubber stopper 5 can be fixed in place by one of the retaining rings 102. To further strengthen the seal between the rubber stopper 5 and the B end opening of the metal tube 1, the rubber stopper 5 is provided with a contact surface that matches the B end opening of the metal tube 1. Furthermore, the rubber stopper 5 needs to be made of a material with good elasticity and corrosion resistance to ensure an effective seal and prevent moisture intrusion during long-term use.

[0060] The fifth step is to prepare the reed 6, press the reed 6 into the interior of the metal tube 1 from the B end of the metal tube 1, and then fix the reed 6 to the A end of the metal tube 1 through laser welding technology, while also ensuring internal conductivity.

[0061] Example 2:

[0062] like Figure 3-Figure 5 、 Figure 12-17 As shown, the production process includes the following steps:

[0063] The first step is to cut a hollow metal tube 1 of a predetermined length from the raw material. The two ends of the metal tube 1 are marked as end A and end B respectively. Among them, the metal tube 1 for producing the charging gun terminal is made of copper. The user can cut the hollow metal tube 1 according to the predetermined length by cutting equipment, and deburr the cut position of the metal tube 1.

[0064] The second step involves using a dedicated tube reduction jig 2, which is rotated at high speed along the axial direction of the metal tube 1 and pressed into the B end of the metal tube 1 until the B end of the metal tube 1 is reduced to a predetermined size. The tube reduction jig 2 is provided with a compression groove 201 for pressing into and gradually reducing the B end of the metal tube 1. As the compression groove 201 of the tube reduction jig 2 is gradually pressed into the B end of the metal tube 1, the B end of the metal tube 1 gradually shrinks along the inner wall of the compression groove 201, uniformly shrinking to the predetermined size without deformation during the reduction process.

[0065] In the third step, two holes 7 are punched on the surface of the metal tube using a punching device. The holes 7 are mainly used for flowing rubber, allowing the injected rubber to solidify simultaneously on the outside and inside of the metal tube 1 for sealing.

[0066] The fourth step is to prepare the hollow rubber mold 8 and the second ejector fixture 9. During operation, the metal tube 1 is inserted into the interior of the rubber mold 8, so that the outer side of the metal tube 1 is in close contact with the inner wall of the rubber mold 8. At this point, the rubber mold 8 has an external space that is connected to the hole 7. Before injecting the glue, the second ejector fixture 9 is inserted from the A end of the metal tube 1 and the opening at the A end is blocked. Then, the glue injection equipment is inserted from the B end opening of the metal tube 1 and the glue is injected. The injected glue is nylon PA66. At this point, the injected glue not only fills the space inside the metal tube 1 but also flows through the hole 7 to the external space formed by the outside of the metal tube 1 and the rubber mold 8. The second ejector fixture 9 is removed. After the glue solidifies, it not only seals the B end opening of the metal tube 1 but also prevents the rubber mold 8 from moving. In addition, a second groove 801 for installing a waterproof ring is provided on the outside of the rubber mold 8.

[0067] The fifth step is to prepare the reed 6, press the reed 6 into the interior of the metal tube 1 from the B end of the metal tube 1, and then fix the reed 6 to the A end of the metal tube 1 through laser welding technology, while also ensuring internal conductivity.

[0068] It can be seen from the above two embodiments that the various steps of producing the charging gun terminal do not affect each other. The process can be processed sequentially on the same metal tube 1. During the processing, the production efficiency is high, which saves more processing time. Moreover, the metal tube 1 does not generate excess waste during the production process, saving production costs.

[0069] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A charging gun terminal production process, characterized in that: The production steps include: In the first step, a hollow metal tube of predetermined length is cut from the raw material, and the two ends of the metal tube are marked as end A and end B respectively; The second step is to use a dedicated tube reduction jig, which is rotated at high speed along the axial direction of the metal tube and pressed into the B end of the metal tube until the B end of the metal tube is reduced to a predetermined size. The tube reduction jig is provided with a compression groove for pressing into and gradually reducing the B end of the metal tube. The third step is to pre-treat the metal tube so that the internal structure of the metal tube is formed to facilitate sealing the opening at end B, which can be done in one of the following two ways: Method 1: Using a dedicated cam jig and a first push rod jig, first insert the first push rod jig from end A of the metal tube. Then, press the cam jig down onto the outside of the metal tube and rotate it at least two turns to form a first groove for installing the waterproof ring on the outside of the metal tube and a raised snap ring at the corresponding position on the inner wall of the metal tube. Method 2: Use the punching device to punch two holes on the surface of the metal tube; Step 4: Further process and seal the opening at end B of the metal tube according to the processing method selected in step 3, wherein: If you choose method 1 in step 3, prepare a rubber stopper and press it into the metal tube from end A until it seals the opening at end B of the metal tube. The rubber stopper is fixed in place with a retaining ring. If method 2 is selected in step 3, prepare a hollow rubber mold and a second ejector fixture. Insert the metal tube into the rubber mold. Then insert the second ejector fixture from end A of the metal tube. Insert the glue injection device from end B of the metal tube and inject the glue. The glue flows out through the two holes to fill the inner wall of the rubber mold. Seal the opening at end B of the metal tube. Set a second groove on the outside of the rubber mold for installing the waterproof ring. The fifth step is to prepare the reed, press the reed into the interior of the metal tube from the B end of the metal tube, and then fix the reed to the A end of the metal tube through laser welding technology.

2. A charging gun terminal production process according to claim 1, characterized in that: The metal tube is made of copper.

3. A charging gun terminal production process according to claim 1, characterized in that: In the second step, when the compression groove is pressed into the B end of the metal tube, the metal tube is uniformly reduced to the predetermined size without deformation.

4. A charging gun terminal production process according to claim 1, characterized in that: In the third step, in method 1, the first push rod jig and the cam jig are used in conjunction to ensure that the size and position of the formed first groove and the retaining ring correspond to each other, so as to meet the installation of the waterproof ring and the limiting function of the retaining ring.

5. The production process of a charging gun terminal according to claim 1, characterized in that: In the third step, method 2, the two holes are set symmetrically.

6. A charging gun terminal production process according to claim 1, characterized in that: After the first step and before the second step, a grinding tool is brought into contact with the surface of the metal pipe to remove burrs on the surface of the metal pipe.

7. The production process of a charging gun terminal according to claim 1, characterized in that: After the third step and before the fourth step, the surface of the metal pipe is rinsed with a flushing tool to remove residual contaminants.

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