Charging gun terminal production process

Abstract

The invention discloses a charging gun terminal production process in the field of charging guns, and the charging gun terminal production process comprises the following steps: cutting a hollow metal tube with a preset length from a raw material, and marking the two ends of the metal tube as an A end and a B end respectively; the pipe shrinking jig is rotated at a high speed in the axial direction of the metal pipe and pressed into the end B of the metal pipe till the end B of the metal pipe is shrunk to the preset size; the metal pipe is pretreated, so that a structure facilitating sealing of the opening of the B end is formed in the metal pipe; further processing and sealing an opening at the end B of the metal tube; and a reed is prepared, and the reed is pressed into the metal pipe from the end B of the metal pipe to be welded and fixed. The whole production steps are optimized on the whole, traditional complex operation is avoided, in the machining process, the whole production efficiency is improved, more machining time is saved, in addition, no redundant waste is generated in the machining process of the metal pipe, and the production cost is saved.

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] The charging gun terminal refers to the metal interface part of the charging gun used to connect and transmit power and signals. Each terminal carries a specific power supply or control signal function to ensure the smooth charging process. The charging gun terminals play a vital role in the charging process of electric vehicles. They are not only responsible for transmitting power, but also bear the functions of communication and control.

[0003] With the rapid development of the electric vehicle industry, the performance and reliability requirements of charging guns, as key equipment for charging electric vehicles, are increasing day by day. As an important part of the charging gun, the quality and production process of the charging gun terminal directly affect the charging efficiency and safety.

[0004] The production process of traditional charging gun terminals is relatively complicated, usually including multiple tedious processing steps, such as cutting, stamping, drilling, etc. Figure 1-2 As shown in the figure, the traditional charging gun terminal is mainly made by turning a copper rod. The whole processing process mainly involves punching and drilling a metal tube 1, inserting a spring 2 into the hole, and finally pressing a cap 3 into the opening. However, the whole processing process is not only time-consuming and inefficient, but also easy to generate waste, increasing production costs. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art 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 a 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 special tube shrinking jig to rotate the tube shrinking jig at high speed along the axial direction of the metal tube and press it into the B end of the metal tube until the B end of the metal tube is reduced to a predetermined size, wherein the tube shrinking jig is provided with a compression groove for pressing in and gradually reducing the B end of the metal tube;

[0010] The third step is to pre-treat the metal tube so that a structure is formed inside the metal tube that is convenient for sealing the opening at the B end, including one of the following two methods:

[0011] Method 1: Use a dedicated cam jig and a first push rod jig, first insert the first push rod jig from the A end of the metal tube, then press the cam jig down to the outside of the metal tube and rotate it at least two circles, so that the first groove for installing the waterproof ring is formed on the outside of the metal tube, and a raised snap ring is formed at the corresponding position of 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 B-end opening of the metal tube according to the processing method selected in step 3, wherein:

[0014] If method 1 is selected in the third step, prepare a rubber plug and press the rubber plug into the inside of the metal tube from the A end of the metal tube until the B end opening of the metal tube is sealed. The rubber plug is fixed by a clamping ring;

[0015] If the third step is method 2, 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, and then 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 the inner wall of the rubber mold for filling, and the B end opening of the metal tube is sealed. A second groove for installing a waterproof ring is provided on the outside of the rubber mold;

[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 combination to ensure that the sizes and positions 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 method 2 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 the 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, 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 Schematic cross section;

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

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

[0029] Figure 5 It is a cross-sectional view of the second step of production of the first and second embodiments of the present invention;

[0030] Figure 6 This is a schematic diagram of the moving direction before production in the third step of the first embodiment of the present invention;

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

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

[0033] Fig. 9 This is a cross-sectional view of the production state of the fourth step of the first embodiment of the present invention;

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

[0035] Fig.11 This is a cross-sectional view of the production state of the fifth step of the first embodiment of the present invention;

[0036] Fig.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] Fig.13 This is a schematic cross-sectional view of the metal punch after punching a hole in the third step of the second embodiment of the present invention;

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

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

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

[0041] Fig.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 plug, 6-reed, 7-hole position, 8-rubber mold, 9-second top 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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 saving. The production process steps are illustrated by the following two embodiments.

[0054] Embodiment 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. The metal tube 1 for producing the charging gun terminal is made of copper. The user can cut the hollow metal tube 1 by cutting equipment according to the predetermined length, and deburr the cut position of the metal tube 1.

[0057] In the second step, a special tube shrinking jig 2 is used to rotate the tube shrinking jig 2 at high speed along the axial direction of the metal tube 1 and press it into the B end of the metal tube 1 until the B end of the metal tube 1 is reduced to a predetermined size, wherein the tube shrinking 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 shrinking jig 2 is gradually pressed into the B end of the metal tube 1, the B end of the metal tube 1 will gradually shrink along the inner wall of the compression groove 201, and evenly shrink to a predetermined size, and no deformation will occur during the shrinking process.

[0058] The third step is to use the special cam jig 3 and the 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 to the outside of the metal tube 1 and rotate it at least two times, so that two semicircular first grooves 101 for installing the waterproof ring are formed on the outside of the metal tube 1, and two raised snap rings 102 are formed at the corresponding positions of the inner wall of the metal tube 1, wherein the outside of the cam jig 3 is provided with two annular bodies 301 for squeezing the metal tube 1 to generate the first grooves 101, and the outside of the first push rod jig 4 is provided with two annular grooves 401 for accommodating the snap rings 102. It should be supplemented 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. Moreover, when clamping the metal tube 1, the annular body 301 disposed on the outside of the metal tube 1 and the annular groove 401 disposed on the inside of the metal tube 1 are in corresponding positions, so that as the cam fixture 3 rotates, it is easier to generate the first groove 101 and the clamping ring 102 on the outside and inside of the metal tube 1, so as to meet the function of installing the waterproof ring of the first groove 101 and the limiting function of the clamping ring 102. After completion, the metal tube 1 can be cleaned to remove the contaminants remaining on the surface of the metal tube 1, so as to improve the finish of the outer surface.

[0059] The fourth step is to prepare the rubber plug 5, press the rubber plug 5 into the interior of the metal tube 1 from the A end of the metal tube 1 until the B end opening of the metal tube 1 is sealed, and the rubber plug 5 can be fixed by one of the clamping rings 102. In order to further enhance the sealing performance between the rubber plug 5 and the B end opening of the metal tube 1, the rubber plug 5 is provided with a contact surface matching the B end opening of the metal tube 1. In addition, the rubber plug 5 needs to be made of a material with good elasticity and corrosion resistance to ensure effective sealing 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] Embodiment 2:

[0062] like Figure 3-Figure 5 , Figure 12-Figure 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. The metal tube 1 for producing the charging gun terminal is made of copper. The user can cut the hollow metal tube 1 by cutting equipment according to the predetermined length, and deburr the cut position of the metal tube 1.

[0064] In the second step, a special tube shrinking jig 2 is used to rotate the tube shrinking jig 2 at high speed along the axial direction of the metal tube 1 and press it into the B end of the metal tube 1 until the B end of the metal tube 1 is reduced to a predetermined size, wherein the tube shrinking 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 shrinking jig 2 is gradually pressed into the B end of the metal tube 1, the B end of the metal tube 1 will gradually shrink along the inner wall of the compression groove 201, and evenly shrink to a predetermined size, and no deformation will occur during the shrinking 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, and the injected rubber can be solidified on the outside and inside of the metal tube 1 simultaneously 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 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 time, the rubber mold 8 is provided with an external space that is connected to the hole 7. Before injecting glue, the second ejector fixture 9 is inserted from the A end of the metal tube 1, and the opening of the A end is blocked. Then, the injection device is inserted from the opening of the B end of the metal tube 1 and the glue is injected. The injected glue is nylon material PA66. At this time, 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. Take out the second ejector fixture 9. After the glue solidifies, it can not only seal the B end opening of the metal tube 1, but also prevent 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 will not generate excess waste during the production process, saving production costs.

[0069] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A charging gun terminal production process, characterized in that: The production process includes the following steps: In the first step, a hollow metal tube of a 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 special tube shrinking jig to rotate the tube shrinking jig at high speed along the axial direction of the metal tube and press it into the B end of the metal tube until the B end of the metal tube is reduced to a predetermined size, wherein the tube shrinking jig is provided with a compression groove for pressing in and gradually reducing the B end of the metal tube; The third step is to pre-treat the metal tube so that a structure is formed inside the metal tube that is convenient for sealing the opening at the B end, including one of the following two methods: Method 1: Use a dedicated cam jig and a first push rod jig, first insert the first push rod jig from the A end of the metal tube, then press the cam jig down to the outside of the metal tube and rotate it at least two circles, so that the first groove for installing the waterproof ring is formed on the outside of the metal tube, and a raised snap ring is formed at the corresponding position of 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 B-end opening of the metal tube according to the processing method selected in step 3, wherein: If method 1 is selected in the third step, prepare a rubber plug and press the rubber plug into the inside of the metal tube from the A end of the metal tube until the B end opening of the metal tube is sealed. The rubber plug is fixed by a clamping ring; If the third step selects method 2, 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, and then 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 the inner wall of the rubber mold for filling, and the B end opening of the metal tube is sealed. A second groove for installing a waterproof ring is provided on the outside of the rubber mold; 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 method 1 of the third step, the first push rod fixture and the cam fixture 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. A charging gun terminal production process according to claim 1, characterized in that: In method 2 of the third step, 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. A charging gun terminal production process according to claim 1, characterized in that: After the third step and before the fourth step, the surface of the metal pipe is rinsed by a flushing tool to remove residual contaminants.

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