Terminal

Abstract

The utility model discloses a terminal which is used for being plugged with a matching terminal and comprises a tubular plugging end and a tubular functional end, one end of the plugging end is plugged with the matching terminal, one of the other end of the plugging end and one end of the functional end is turned and curled outwards in the circumferential direction, and the other end of the plugging end and one end of the functional end is turned and curled inwards in the circumferential direction. According to the utility model, the terminal is divided into the plugging end and the functional end, the plugging end and the functional end are made of tubular materials, and the curled parts of the plugging end and the functional end are overlapped to form the curled connecting part, so that the contact area between the split bodies is increased by the curled connecting part, and the conductivity between the split bodies is improved; the problem of low connection conductivity caused by insufficient contact area of split connection of terminals made of different materials is solved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and more specifically, to a terminal. Background Technology

[0002] With the rapid development of new energy electric vehicles, the use of terminals for electrical connections is increasing. The terminals used in charging guns and charging sockets primarily transmit electrical signals or conduct electricity. The requirements for these terminals are becoming increasingly stringent, demanding both high strength for inter-terminal connections and lightweight design to meet the needs of vehicle weight reduction and cost reduction. Therefore, a trend is towards modular terminal designs, with each component made of a different material to simultaneously meet these requirements. However, traditional connection methods result in insufficient contact area between components made of different materials, leading to low conductivity and affecting power transmission efficiency. Therefore, a new technical solution is urgently needed to address these issues. Utility Model Content

[0003] One objective of this invention is to provide a new technology solution for terminals to solve the problem of low conductivity caused by insufficient contact area between traditional terminals made of different materials.

[0004] According to the present invention, a terminal is provided for insertion into a mating terminal, comprising a tubular insertion end and a tubular functional end. One end of the insertion end is inserted into the mating terminal, and the other end of the insertion end is inserted into one end of the functional end. One end is circumferentially outwardly curled, and the other end is circumferentially inwardly curled, and the two curled portions overlap to form a curled connection portion.

[0005] Optionally, the curled connection portion includes a first curled portion located at the plug-in end and a second curled portion located at the functional end. The diameter of the plug-in end is smaller than the diameter of the functional end. The first curled portion is formed by curling one end of the plug-in end outward away from the axis, and the second curled portion is formed by curling one end of the functional end inward close to the axis.

[0006] Optionally, the curled connection portion includes a first curled portion located at the plug-in end and a second curled portion located at the functional end. The diameter of the plug-in end is larger than the diameter of the functional end. The first curled portion is formed by curling one end of the plug-in end inward toward the axis, and the second curled portion is formed by curling one end of the functional end outward away from the axis.

[0007] Optionally, the curling angle of the curled connector is greater than or equal to 270°.

[0008] Optionally, the inner wall of the larger of the plug-in end and the functional end has a blocking part that protrudes in the axial direction near the position of the curled connection part, and the blocking part abuts against the curled connection part.

[0009] Optionally, it also includes a partition, at least partially located within the curled connection portion, and the curled portions of the plug-in end and the functional end respectively superimposed and abutting against the two surfaces of the partition.

[0010] Optionally, the partition includes a flat portion and a curled portion, the curled portion being at least partially located within the curled connecting portion, the flat portion being located between the plug-in end and the functional end, and the edge of the flat portion being circumferentially connected to the edge of the curled portion.

[0011] Optionally, the materials of the plug-in terminal and the functional terminal are different, the material of the partition is the same as the material of one of the plug-in terminal and the functional terminal, or the potential of the material of the partition is located between the potentials of the materials of the plug-in terminal and the functional terminal.

[0012] Optionally, a cylindrical spring is provided inside the plug-in terminal, and the outer peripheral surface of the spring at least partially abuts against and is electrically connected to the inner peripheral surface of the plug-in terminal.

[0013] Optionally, the functional end includes a fixing part and a connecting part that are connected to each other. The end of the fixing part is curled with one end of the plug-in end to form a curled connecting part. The fixing part is provided with at least one annular groove in the circumferential direction, and the connecting part forms a flat structure with the inner wall fitting.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model divides the integral terminal into a plug-in end and a functional end. The ends of the plug-in end and the functional end adjacent to each other are rolled outward in one direction and rolled inward in the other direction. The rolled parts of the two are superimposed to form a rolled connection part. The plug-in end and the functional end are connected together by the rolled part. The rolled connection part increases the contact area between the two parts and improves the conductivity between the two parts. It solves the problem that the contact area of ​​the connection between terminals of different materials is insufficient, resulting in low conductivity.

[0016] 2. Traditional integrated terminals are usually made of the same material, such as copper or copper alloy. However, copper resources are scarce, copper costs are high, and copper terminals are heavy, which cannot meet the lightweight requirements of the new energy vehicle industry. The terminal plug-in end and the functional end of this utility model are made of different materials. The plug-in end can be made of copper or copper alloy, and the functional end can be made of aluminum or aluminum alloy. This not only reduces costs but also reduces the weight of the terminal, achieving lightweighting, improving the overall service life, and meeting the different electrical connection requirements of the terminal.

[0017] 3. The partition can support the terminal, strengthen the overall structural strength of the terminal, increase the connection stability between the plug end and the functional end, and also seal the terminal to prevent moisture and impurities from entering the terminal from the connection between the plug end and the functional end, affecting the electrical connection safety between the terminal and the mating terminal. It also solves the problem of the traditional stamped terminal cavity needing to be sealed with glue.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of a terminal according to the present invention;

[0021] Figure 2 This is an exploded structural diagram of a terminal according to the present invention;

[0022] Figure 3 This is a cross-sectional view of one embodiment of a terminal according to the present invention;

[0023] Figure 4 This is a cross-sectional view of another embodiment of a terminal according to the present invention;

[0024] Figure 5 This is an exploded structural diagram of a terminal with a partition according to the present invention;

[0025] Figure 6 This is a cross-sectional view of a terminal with a partition according to the present invention.

[0026] The diagram is marked as follows:

[0027] 10. Plug-in end; 11. First curled part; 20. Functional end; 21. Fixing part; 211. Second curled part; 212. Blocking part; 213. Annular groove; 22. Connecting part; 30. Partition plate; 31. Flat part; 32. Curled part; 40. Spring. Detailed Implementation

[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0029] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0030] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0031] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0032] According to the first aspect of this utility model, as Figures 1-6 As shown, a terminal is provided for insertion with a mating terminal, including a tubular insertion end 10 and a tubular functional end 20. One end of the insertion end 10 is inserted with the mating terminal, and the other end of the insertion end 10 is inserted with one end of the functional end 20. One end is circumferentially outward curled, and the other end is circumferentially inward curled, and the curled portions of the two ends overlap to form a curled connection portion.

[0033] With the rapid development of new energy electric vehicles, the use of terminals for electrical connections is increasing. The terminals used in charging guns and charging sockets primarily transmit electrical signals or conduct electricity. The requirements for these terminals are becoming increasingly stringent, demanding both high strength for interlocking and lightweight design to meet the needs of vehicle weight reduction and cost reduction. Therefore, a trend is towards modular terminal designs, with each component made of a different material to simultaneously meet these requirements. However, traditional connection methods often result in insufficient contact area between components made of different materials, leading to low conductivity and impacting power transmission efficiency.

[0034] This invention divides the integral terminal into a plug-in end 10 and a functional end 20. The adjacent ends of the plug-in end 10 and the functional end 20 are respectively circumferentially outward-curled and circumferentially inward-curled. The two curled parts overlap to form a curled connection part. The plug-in end 10 and the functional end 20 are connected together by the curling. The curled connection part increases the contact area between the plug-in end 10 and the functional end 20, improves the conductivity between the plug-in end 10 and the functional end 20, and solves the problem of insufficient contact area and low conductivity caused by separate connection of terminals of different materials.

[0035] In some embodiments, such as Figures 2-3As shown, the curled connection portion includes a first curled portion 11 located at the insertion end 10 and a second curled portion 211 located at the functional end 20. The diameter of the insertion end 10 is smaller than the diameter of the functional end 20. The first curled portion 11 is formed by curling one end of the insertion end 10 outward away from the axis, and the second curled portion 211 is formed by curling one end of the functional end 20 inward close to the axis.

[0036] In other embodiments, such as Figure 4 As shown, the curled connection portion includes a first curled portion 11 located at the insertion end 10 and a second curled portion 211 located at the functional end 20. The diameter of the insertion end 10 is larger than the diameter of the functional end 20. The first curled portion 11 is formed by curling one end of the insertion end 10 inward toward the axis, and the second curled portion 211 is formed by curling one end of the functional end 20 outward away from the axis.

[0037] In some embodiments, such as Figures 2-6 As shown, the curling angle of the curled connection is greater than or equal to 270°.

[0038] The curling angle of the curled connection part is greater than or equal to 270°, so that the curled parts of the plug end 10 and the functional end 20 are superimposed to form a more stable and tighter curled connection part, which avoids the curled part from opening up during use, resulting in unstable electrical connection and electrical risks.

[0039] In some embodiments, such as Figure 3 As shown, the inner wall of the larger diameter of the plug-in end 10 and the functional end 20 is provided with a blocking part 212 that protrudes in the axial direction near the position of the curled connection part, and the blocking part 212 abuts against the curled connection part.

[0040] The blocking part 212 can prevent the curled connection part from unfolding during use, so that the plug end 10 and the functional end 20 always remain firmly connected.

[0041] In some embodiments, such as Figures 5-6 As shown, it also includes a partition 30, which is at least partially located within the curled connection portion, and the curled portions of the insertion end 10 and the functional end 20 respectively overlap and abut against the two surfaces of the partition 30.

[0042] The partition 30 serves three purposes: first, it provides support when the curled portions of the plug end 10 and the functional end 20 are pressed together, preventing the tubular body from deforming after crimping and ensuring the roundness of the terminal; second, it supports the interior of the terminal and strengthens the overall structural strength of the terminal; and third, it seals the interior of the terminal.

[0043] In some embodiments, such as Figures 5-6As shown, the partition 30 includes a flat portion 31 and a curled portion 32. The curled portion 32 is at least partially located within the curled connecting portion. The flat portion 31 is located between the plug-in end 10 and the functional end 20, and the edge of the flat portion 31 is circumferentially connected to the edge of the curled portion 32.

[0044] The curled portion 32 is used to connect and fix the partition 30 to the curled portion of the plug-in end 10 and the functional end 20 together, and the flat portion 31 is used to seal the inside of the terminal to prevent moisture and impurities from entering the inside of the terminal and affecting the stability of the electrical connection.

[0045] In some embodiments, the materials of the plug-in terminal 10 and the functional terminal 20 are different, the material of the partition 30 is the same as the material of one of the plug-in terminal 10 and the functional terminal 20, or the potential of the material of the partition 30 is located between the potentials of the materials of the plug-in terminal 10 and the functional terminal 20.

[0046] Traditional integrated terminals are typically made of the same material, such as copper or copper alloy. However, copper resources are scarce, copper costs are high, and copper terminals are heavy, failing to meet the lightweight requirements of the current new energy vehicle industry. In this invention, the plug-in end 10 and the functional end 20 are made of different materials. The plug-in end 10 can be made of copper or copper alloy, while the functional end 20 can be made of aluminum or aluminum alloy. This not only reduces costs but also lightens the terminal's weight, achieving lightweight design, improving overall service life, and meeting different electrical connection requirements. The partition 30, made of copper or copper alloy or aluminum or aluminum alloy, serves two purposes: first, to support the interior of the terminal and strengthen its overall structural strength; and second, to seal the interior of the terminal.

[0047] Furthermore, the common copper terminals are connected to the aluminum conductive parts of the cable, and the direct contact between the copper terminals and the aluminum wire causes electrochemical corrosion. By connecting the functional terminal 20 made of aluminum or aluminum alloy to the aluminum or aluminum alloy conductive parts of the cable through the connecting part 22, the problem of electrochemical corrosion caused by the direct contact between the copper terminals and the aluminum wire is solved, thus improving the overall service life of the terminals.

[0048] Since the plug-in end 10 and the functional end 20 of this utility model are made of different materials, electrochemical corrosion occurs between the different materials due to the potential difference. In order to reduce the impact of electrochemical corrosion, in some embodiments, a partition 30 made of a material with a potential between the materials of the plug-in end 10 and the functional end 20 can be used for transition. This can slow down the electrochemical corrosion between the overlapping joint surfaces of the curled parts of the plug-in end 10 and the functional end 20, thereby increasing the service life of the electrical connection structure.

[0049] In some embodiments, such as Figure 1 and Figure 3As shown, a cylindrical spring 40 is provided inside the plug-in end 10, and the outer peripheral surface of the spring 40 at least partially abuts against and is electrically connected to the inner peripheral surface of the plug-in end 10.

[0050] The spring 40 is used to connect with the mating terminal. The outer peripheral surface of the mating terminal abuts against and is electrically connected to the inner peripheral surface of the spring 40 at the minimum inner diameter. The connection between the spring 40 and the mating terminal can improve the stability and reliability of the connection between the terminals. The spring 40 maintains the proper position and good contact force of the mating terminal in the insertion cavity of the insertion end 10, and prevents excessive insertion and removal force from causing loosening of the connection and wear of the terminal.

[0051] In some embodiments, such as Figure 1 , Figure 3 , Figure 5 As shown, the functional end 20 includes a fixing part 21 and a connecting part 22 that are connected to each other. The end of the fixing part 21 is curled with one end of the plug-in end 10 to form a curled connecting part. The fixing part 21 is provided with at least one annular groove 213 in the circumferential direction. The connecting part 22 forms a flat structure with the inner wall fitting.

[0052] The annular groove 213 can be configured in two parts: one for snapping the terminal into the fixed position, and the other for placing a sealing ring between the terminal and the installation environment. The connecting part 22 forms a flat structure with an inner wall that fits together. The flat structure is used for welding or crimping electrical connection with the conductive part of the cable.

[0053] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A terminal for insertion with a mating terminal, characterized in that, It includes a tubular plug-in end and a tubular functional end. One end of the plug-in end is plugged into the mating terminal, and the other end of the plug-in end is connected to one end of the functional end. One end is circumferentially outward curled, and the other end is circumferentially inward curled. The curled parts of the two ends overlap to form a curled connection part.

2. A terminal according to claim 1, characterized in that, The curled connection portion includes a first curled portion located at the plug-in end and a second curled portion located at the functional end. The diameter of the plug-in end is smaller than the diameter of the functional end. The first curled portion is formed by curling one end of the plug-in end outward away from the axis, and the second curled portion is formed by curling one end of the functional end inward close to the axis.

3. A terminal according to claim 1, characterized in that, The curled connection portion includes a first curled portion located at the plug-in end and a second curled portion located at the functional end. The diameter of the plug-in end is larger than the diameter of the functional end. The first curled portion is formed by one end of the plug-in end curling inward in the direction close to the axis, and the second curled portion is formed by one end of the functional end curling outward in the direction away from the axis.

4. A terminal according to claim 1, characterized in that, The curling angle of the curled connection is greater than or equal to 270°.

5. A terminal according to claim 1, characterized in that, The inner wall of the larger diameter of the plug-in end and the functional end has a blocking part that protrudes in the axial direction near the position of the curled connection part, and the blocking part abuts against the curled connection part.

6. A terminal according to claim 1, characterized in that, It also includes a partition, at least partially located within the curled connection portion, and the curled portions of the plug-in end and the functional end respectively overlap and abut against the two surfaces of the partition.

7. A terminal according to claim 6, characterized in that, The partition includes a flat portion and a curled portion. The curled portion is at least partially located within the curled connecting portion. The flat portion is located between the plug-in end and the functional end, and the edge of the flat portion is circumferentially connected to the edge of the curled portion.

8. A terminal according to claim 6, characterized in that, The material of the plug-in terminal is different from that of the functional terminal, the material of the partition is the same as that of the plug-in terminal and the functional terminal, or the potential of the material of the partition is between the potentials of the materials of the plug-in terminal and the functional terminal.

9. A terminal according to claim 1, characterized in that, The plug end is provided with a cylindrical spring, and the outer peripheral surface of the spring at least partially abuts against and is electrically connected to the inner peripheral surface of the plug end.

10. A terminal according to claim 1, characterized in that, The functional end includes a fixing part and a connecting part that are connected to each other. The end of the fixing part is curled with one end of the plug-in end to form a curled connecting part. The fixing part is provided with at least one annular groove in the circumferential direction, and the connecting part forms a flat structure with the inner wall fitting.

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