Terminal

Abstract

The utility model discloses a terminal which comprises a plugging base body and an installation base body, one end of the plugging base body forms a cylindrical matching end, the other end of the plugging base body is a plugging end with a plugging cavity, the matching end is provided with a cavity communicated with the plugging cavity, the installation base body comprises a fixing part and a wiring part which are connected with each other, and the end face of the fixing part is provided with an installation hole. The tail end of the matching end is inserted into the mounting hole and is in interference fit with the mounting hole, the outer wall of the matching end is provided with at least one reverse clamping elastic piece, the side wall of the mounting hole is radially provided with at least one through clamping groove which is clamped with the reverse clamping elastic piece, and the reverse clamping elastic piece is clamped with the clamping groove so as to prevent the insertion base body from being separated from the mounting base body and keep electric connection. According to the utility model, an integrated terminal is changed into the plug-in base body and the installation base body which are connected, the plug-in base body and the installation base body can be detached, maintained and replaced after being damaged, the problem that the terminal is completely replaced when being damaged is solved, the plug-in base body is made of copper or copper alloy, and the installation base body is made of aluminum or aluminum alloy, so that the weight is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and more specifically, to a terminal. Background Art

[0002] With the rapid development of new energy electric vehicles, the use of terminals for electrical connection is increasing. The terminals used in charging guns and charging seats are mainly used to transmit electrical signals or conduct electricity. The terminals need to be plugged into the plug-in terminals to achieve electrical connection. During the repeated plugging and unplugging of the plug-in terminals, wear is easily generated, which affects the charging effect. The worn traditional integrated terminals are usually replaced as a whole due to the inconvenience of maintenance. In addition, copper terminals are made of copper materials, which are in short supply and costly. The copper terminals are heavy and cannot meet the current requirements for lightweight in the field of new energy vehicles.

[0003] Therefore, a new solution is urgently needed in the prior art to solve the above problems. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for terminals to solve the problems that traditional one-piece copper terminals are very easy to wear during repeated plugging and unplugging with mating terminals, thus affecting the charging effect, the worn terminals are usually replaced as a whole due to the inconvenience of maintenance, and the copper terminals are high in cost and heavy in weight.

[0005] According to the utility model, a terminal is provided, comprising a plug-in base and a mounting base that can be detachably connected, one end of the plug-in base is constructed as a cylindrical mating end, and the other end is surrounded by a plurality of elastic arms to form a plug-in end with a plug-in cavity, which is used for mating with the mating terminal, a plurality of elastic arms extend axially from the circumference of the mating end, and there is a contraction gap between adjacent elastic arms, the mating end has a cavity that passes through the plug-in cavity, the mounting base comprises an interconnected fixing portion and a wiring portion, the end face of the fixing portion is provided with a mounting hole, the end end of the mating end is inserted into the mounting hole and there is an interference fit between the two, and the end face of the mating end abuts against the bottom wall of the mounting hole, the outer wall of the mating end is provided with at least one anti-card spring sheet, and the side wall of the mounting hole is radially provided with at least one card slot that is carded with the anti-card spring sheet, and the anti-card spring sheet is carded with the card slot to prevent the plug-in base from being separated from the mounting base and maintain electrical connection.

[0006] Optionally, the material of the plug-in base is copper or copper alloy, the material of the mounting base is aluminum or aluminum alloy, a conductive transition layer is provided on the outer peripheral surface and end surface of the mating end and / or the side wall and bottom wall of the mounting hole, and the plug-in base is electrically connected to the mounting base through the conductive transition layer.

[0007] Optionally, at least one mounting groove is provided on the outer peripheral surface of the fixing portion, for clamping and fixing with a fixing device and / or installing a sealing ring.

[0008] Optionally, an elastic support structure is provided in the cavity corresponding to the end of the mating end inserted into the mounting hole, and an outer wall of the elastic support structure at least partially abuts against an inner wall of the cavity.

[0009] Optionally, there are multiple anti-card spring sheets, which are arranged at intervals along the circumference of the mating end, and the card slots are arranged on the side walls of the mounting hole in a one-to-one correspondence with the anti-card spring sheets.

[0010] Optionally, the plug-in base is integrally formed by stamping and curling a plate, and the mounting base is integrally formed by machining or cold heading.

[0011] Optionally, a plurality of the elastic arms are arranged at intervals along the circumference of the mating end, and the inner diameter of the plug-in cavity gradually decreases along the direction from the mating end to the free end of the elastic arm.

[0012] Optionally, the free end of the elastic arm is bent outwardly in a direction gradually away from the axis of the plug-in base and surrounds to form a guide portion.

[0013] Optionally, it also includes a protective tube sleeved on the plug-in end and at least part of the mating end to strengthen the clamping force of the elastic arm on the outer wall of the plug-in terminal, at least one snap-in piece is stamped on the outer wall of the protective tube, and a snap-in hole is provided on the outer wall of the mating end, and the snap-in piece is snapped into the snap-in hole to prevent the protective tube from axially detaching from the plug-in base.

[0014] Optionally, a plurality of introductory petals bent inwardly and facing the guide portion are provided at the end of the protective tube, the plurality of introductory petals are circumferentially spaced apart on the protective tube, and the minimum inner diameter surrounded by the plurality of introductory petals is greater than or equal to the minimum inner diameter of the guide portion.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model divides the integral terminal into a plug-in base and a mounting base, and the two are connected together by means of a reverse card spring sheet at the mating end and a card slot on the side wall of the mounting hole. When either base is damaged, it can be disassembled for easy maintenance and replacement. This solves the problem that the integrated terminal is very likely to wear out during repeated plugging and unplugging with the plug-in terminal, thus affecting the charging effect, and the problem that the worn terminal is usually replaced as a whole due to the inconvenience of maintenance, thereby improving the service life of the terminal.

[0017] 2. Copper is usually used to make terminals. Copper has good electrical conductivity, thermal conductivity and plasticity and is widely used. However, copper resources are in short supply, copper costs are high, and copper terminals are heavy and cannot meet the current requirements for lightweight in the field of new energy vehicles. In addition, the common copper wiring terminals are connected to the aluminum conductive parts of the cables, and the copper terminals and aluminum wires are directly connected and contacted to cause electrochemical corrosion. The utility model changes the terminals into split terminals. The material of the plug-in base is copper or copper alloy, and the material of the mounting base is aluminum or aluminum alloy. Not only can the terminal be lightweight, but also the cost can be reduced. The wiring part of the mounting base made of aluminum or aluminum alloy is connected to the aluminum or aluminum alloy conductive part of the cable, which can also solve the problem of electrochemical corrosion caused by the direct connection between the traditional copper terminals and aluminum wires, thereby improving the overall service life of the terminals.

[0018] 3. The terminal is provided with an elastic support structure in the cavity corresponding to the mating end inserted into the mounting hole, the outer wall of the elastic support structure at least partially abuts against the inner wall of the cavity, the elastic support structure is elastic plastic or a spring with expanding and contracting diameter, and the elastic support structure can elastically support the inner wall of the cavity of the mating end, so that the outer wall at the end of the mating end inserted into the mounting hole is tightly fitted with the inner wall of the mounting hole and electrically connected, preventing the mating end from detaching from the mounting hole, ensuring the stable connection between the plug-in base and the mounting base, and further ensuring the stability of the electrical connection between the two.

[0019] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of a terminal of the utility model;

[0022] Figure 2 This is a schematic diagram of the exploded structure of a terminal of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure in which elastic plastic is arranged in the cavity corresponding to the end of the mating end inserted into the mounting hole of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the utility model in which a spring with a diameter that expands and contracts is arranged in a cavity corresponding to the end of the mating end inserted into the mounting hole;

[0025] Figure 5 This is a schematic cross-sectional view of a terminal of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the terminal with a protective tube of the utility model;

[0027] Figure 7 It is a structural schematic diagram of the protective tube of the utility model.

[0028] The following are marked in the figure:

[0029] 1. Plug-in base; 11. Plug-in end; 111. Elastic arm; 1111. Guide portion; 112. Expansion and contraction joint; 12. Mating end; 121. Anti-card spring sheet; 122. Cavity; 123. Card hole; 2. Mounting base; 21. Fixing portion; 211. Mounting hole; 2111. Card slot; 212. Mounting slot; 22. Wiring portion; 3. Elastic supporting structure; 4. Protective tube; 41. Card sheet; 42. Introducing petals. DETAILED DESCRIPTION

[0030] 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 arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0033] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] According to the first aspect of the present utility model, Figure 1-Figure 7As shown, a terminal is provided, comprising a detachably connected plug-in base 1 and a mounting base 2, wherein one end of the plug-in base 1 is configured as a cylindrical mating end 12, and the other end is surrounded by a plurality of elastic arms 111 to form a plug-in end 11 having a plug-in cavity, which is used to be plugged with the mating terminal, a plurality of elastic arms 111 extend axially from the periphery of the mating end 12, and expansion and contraction gaps 112 are provided between adjacent elastic arms 111, the mating end 12 has a cavity 122 that penetrates the plug-in cavity, and the mounting base 2 comprises an interconnected fixing portion 21 and a wiring portion 22, The end face of the fixing portion 21 is provided with a mounting hole 211, the end of the mating end 12 is inserted into the mounting hole 211 with an interference fit therebetween, and the end face of the mating end 12 abuts against the bottom wall of the mounting hole 211, the outer wall of the mating end 12 is provided with at least one anti-card spring piece 121, and the side wall of the mounting hole 211 is radially provided with at least one slot 2111 that is engaged with the anti-card spring piece 121, and the anti-card spring piece 121 is engaged with the slot 2111 to prevent the plug-in base 1 from being detached from the mounting base 2 and maintain electrical connection.

[0035] With the rapid development of new energy electric vehicles, the use of terminals for electrical connection is increasing. The terminals used in charging guns and charging seats are mainly used to transmit electrical signals or conduct electricity. The terminals need to be plugged into the plug-in terminals to achieve electrical connection. During the repeated plugging and unplugging process with the plug-in terminals, wear is very likely to occur, affecting the charging effect. Traditional integrated terminals that are worn out are usually replaced as a whole due to the inconvenience of maintenance.

[0036] The utility model divides the integral terminal into a plug-in base 1 and a mounting base 2, and the two are clamped together by an anti-clamping spring sheet 121 on the mating end 12 and a clamping groove 2111 on the side wall of the mounting hole 211. When either base is damaged, it can be disassembled for easy maintenance and replacement, thereby solving the problem that the integrated terminal is very likely to be worn out during repeated insertion and removal from the plug-in terminal, thereby affecting the charging effect, and the worn terminal is usually replaced as a whole due to the inconvenience of maintenance, thereby improving the service life of the terminal.

[0037] In some embodiments, the plug-in base 1 is made of copper or copper alloy, the mounting base 2 is made of aluminum or aluminum alloy, a conductive transition layer is provided on the outer peripheral surface and end surface of the mating end 12 and / or the side wall and bottom wall of the mounting hole 211, and the plug-in base 1 is electrically connected to the mounting base 2 through the conductive transition layer.

[0038] Generally, copper is used to make terminals. Copper has good electrical conductivity, thermal conductivity, and plasticity and is widely used. However, copper resources are in short supply, copper costs are high, and copper terminals are heavy and cannot meet the current requirements for lightweight in the field of new energy vehicles. Moreover, the copper terminal is connected to the aluminum conductive part of the cable, and electrochemical corrosion occurs when the copper terminal and the aluminum wire are directly connected and in contact. The utility model is modified into a split terminal, and the material of the plug-in base 1 is copper or copper alloy, and the material of the mounting base 2 is aluminum or aluminum alloy. Not only can the terminal be lightweight, but also the cost can be reduced. The wiring part 22 of the mounting base 2 made of aluminum or aluminum alloy is used to connect to the aluminum or aluminum alloy conductive part of the cable, which can also solve the problem of electrochemical corrosion caused by the direct connection and contact between the traditional copper terminal and the aluminum wire, thereby improving the overall service life of the terminal.

[0039] When the material potential difference between the plug-in base 1 and the mounting base 2 is large, after the plug-in base 1 and the mounting base 2 are connected, the problem of electrochemical corrosion occurs between the two due to the potential difference. In order to reduce the influence of electrochemical corrosion, a conductive transition layer is provided on the outer peripheral surface and end surface of the end of the mating end 12 and / or the side wall and bottom wall of the mounting hole 211. In one case, the material of the conductive transition layer is a metal material with a potential between the material of the plug-in base 1 and the material of the mounting base 2, which can slow down the electrochemical corrosion between the bonding surfaces, thereby increasing the service life of the electrical connection device. Specifically, the material of the conductive transition layer can be one or more of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium and zinc.

[0040] In some embodiments, Figure 2 As shown, at least one mounting groove 212 is provided on the outer circumferential surface of the fixing portion 21 for clamping and fixing with a fixing device and / or installing a sealing ring.

[0041] The mounting groove 212 can be engaged with the fixing device to fix the mounting base 2 on the fixing device, and then fix the plug-in base 1 on the fixing device, so as to facilitate the plugging of the plug-in terminal, or a sealing ring is installed in the mounting groove 212 to seal the gap between the terminal and the mounting device to prevent water vapor and impurities from entering the gap and causing electrical risks after the plug-in terminal and the plug-in base 1 are plugged in.

[0042] In some embodiments, Figure 3-Figure 4 As shown, an elastic support structure 3 is provided in the cavity 122 corresponding to the end of the mating end 12 inserted into the mounting hole 211 , and the outer wall of the elastic support structure 3 at least partially abuts against the inner wall of the cavity 122 .

[0043] The elastic support structure 3 is an elastic plastic or a spring with expanding and contracting diameter. The outer wall of the elastic support structure 3 can elastically support the inner wall of the cavity 122 at the end of the mating end 12, so that the outer wall at the end of the mating end 12 inserted into the mounting hole 211 is tightly fitted with and electrically connected to the inner wall of the mounting hole 211, preventing the end of the mating end 12 from detaching from the mounting hole 211, ensuring the stable connection between the plug-in base 1 and the mounting base 2, and further ensuring the stability of the electrical connection between the two.

[0044] In some embodiments, Figure 2 and Figure 5 As shown, there are multiple anti-card springs 121, and the multiple anti-card springs 121 are arranged at intervals along the circumference of the mating end 12, and the card slots 2111 are arranged on the side walls of the mounting hole 211 in a one-to-one correspondence with the anti-card springs 121.

[0045] The structural design here can strengthen the connection between the plug-in base 1 and the mounting base 2, prevent the mating terminal 12 from being separated from the mounting hole 211, and ensure that the electrical connection between the two is maintained stably.

[0046] In some embodiments, the plug-in base 1 is integrally formed by stamping and curling a plate, and the mounting base 2 is integrally formed by machining or cold heading.

[0047] In practical applications, the plug-in base 1 can be integrally formed by stamping and curling a plate, and the mounting base 2 can be integrally formed by machining, or the plug-in base 1 can be integrally formed by stamping and curling a plate, and the mounting base 2 can be integrally formed by cold heading.

[0048] In some embodiments, Figure 1 As shown, the plurality of elastic arms 111 are arranged at intervals along the circumference of the mating end 12 , and the inner diameter of the plug-in cavity gradually decreases along the direction from the mating end 12 to the free end of the elastic arm 111 .

[0049] The design of the structure here is to increase the clamping force of the plug-in cavity on the plug-in terminal, ensuring a better electrical connection between the two.

[0050] In some embodiments, Figure 1 As shown, the free end of the elastic arm 111 is bent outwardly in a direction gradually away from the axis of the plug-in base 1 and surrounds to form a guide portion 1111 .

[0051] The guide portion 1111 can guide the plug-in terminal to be inserted into the plug-in cavity and electrically connected to the plug-in base 1 .

[0052] In some embodiments, Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, it also includes a protective tube 4 sleeved on the plug-in end 11 and at least part of the mating end 12 to strengthen the clamping force of the elastic arm 111 on the outer wall of the plug-in terminal, at least one snap-in piece 41 is stamped on the outer wall of the protective tube 4, and a snap-in hole 123 is provided on the outer wall of the mating end 12. The snap-in piece 41 is snap-fitted with the snap-in hole 123 to prevent the protective tube 4 from axially detaching from the plug-in base 1.

[0053] The protective tube 4 is sleeved on the plug-in end 11 and at least part of the mating end 12, which can prevent the elastic arm 111 from being damaged or losing elasticity during repeated plugging and unplugging of the plug-in terminal. It can also increase the clamping force of the elastic arm 111 on the outer wall of the plug-in terminal, making the electrical connection between the terminal and the plug-in terminal more stable.

[0054] In some embodiments, Figure 5 and Figure 7 As shown, a plurality of introductory petals 42 bent inwardly and facing the guide portion 1111 are provided at the end of the protective tube 4. The plurality of introductory petals 42 are arranged circumferentially at intervals on the protective tube 4. The minimum inner diameter surrounded by the plurality of introductory petals 42 is greater than or equal to the minimum inner diameter of the guide portion 1111.

[0055] The design of the introduction petal 42 can guide the plug-in terminal to be inserted into the plug-in cavity, and can also protect the elastic arm 111 from being damaged by rigid plugging and protect the end of the guide portion 1111 during the process of inserting the plug-in terminal into the plug-in cavity.

[0056] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified 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, one end of which is plug-connected to a plug-in terminal and the other end of which is connected to a wire, characterized in that: It includes a plug-in base and a mounting base that can be detachably connected. One end of the plug-in base is configured as a cylindrical mating end, and the other end is surrounded by a plurality of elastic arms to form a plug-in end having a plug-in cavity for plugging with the plug-in terminal. The plurality of elastic arms extend axially from the periphery of the mating end, and expansion and contraction gaps are provided between adjacent elastic arms. The mating end has a cavity that penetrates the plug-in cavity. The mounting base comprises a fixing portion and a wiring portion which are interconnected, and an installation hole is provided on the end surface of the fixing portion. The end of the mating end is inserted into the mounting hole with interference fit therebetween, and the end surface of the mating end abuts against the bottom wall of the mounting hole. The outer wall of the mating end is provided with at least one anti-card spring sheet, and the side wall of the mounting hole is radially provided with at least one slot engaged with the anti-card spring sheet. The anti-card spring sheet is engaged with the slot to prevent the plug-in base from being separated from the mounting base and maintain electrical connection.

2. A terminal according to claim 1, characterized in that: The plug-in base is made of copper or copper alloy, the mounting base is made of aluminum or aluminum alloy, a conductive transition layer is provided on the outer peripheral surface and end surface of the mating end and / or the side wall and bottom wall of the mounting hole, and the plug-in base is electrically connected to the mounting base via the conductive transition layer.

3. A terminal according to claim 1, characterized in that: At least one mounting groove is arranged on the outer peripheral surface of the fixing portion, which is used for clamping and fixing with the fixing device and / or installing a sealing ring.

4. A terminal according to claim 1, characterized in that: An elastic support structure is arranged in the cavity corresponding to the end of the mating end inserted into the mounting hole, and an outer wall of the elastic support structure at least partially abuts against an inner wall of the cavity.

5. A terminal according to claim 1, characterized in that: There are multiple anti-card spring sheets, which are arranged at intervals along the circumference of the mating end, and the card slots are arranged on the side walls of the mounting hole in a one-to-one correspondence with the anti-card spring sheets.

6. A terminal according to claim 1, characterized in that: The plug-in base is integrally formed by stamping and curling a plate, and the installation base is integrally formed by machining or cold heading.

7. A terminal according to claim 1, characterized in that: The plurality of elastic arms are arranged at intervals along the circumference of the mating end, and the inner diameter of the plug-in cavity gradually decreases along the direction from the mating end to the free end of the elastic arm.

8. A terminal according to claim 7, characterized in that: The free end of the elastic arm is bent outwardly in a direction gradually away from the axis of the plug-in base and surrounds to form a guide portion.

9. A terminal according to claim 8, characterized in that: It also includes a protective tube sleeved on the plug-in end and at least part of the mating end to strengthen the clamping force of the elastic arm on the outer wall of the plug-in terminal. At least one snap-in piece is stamped on the outer wall of the protective tube, and a snap-in hole is provided on the outer wall of the mating end. The snap-in piece is snap-fitted with the snap-in hole to prevent the protective tube from axially detaching from the plug-in base.

10. A terminal according to claim 9, characterized in that: The end of the protective tube is provided with a plurality of inwardly bent introduction petals facing the guide portion, the plurality of introduction petals are circumferentially spaced apart on the protective tube, and the minimum inner diameter surrounded by the plurality of introduction petals is greater than or equal to the minimum inner diameter of the guide portion.

Images