Electric connection device

Abstract

The utility model discloses an electric connection device, which comprises a terminal connecting plug and a terminal mounting seat, the terminal connecting plug comprises a closed section with a through hole in the center and a plurality of elastic arms axially extending from the periphery of the closed section, the plurality of elastic arms surround the closed section to form a plugging cavity together with the closed section, and the plugging cavity is used for plugging with a plugging terminal. The terminal mounting seat comprises a riveting part, a fixing part and a wiring part, the riveting part protrudes from the end face of the fixing part and penetrates through the through hole, a riveting head with the radial size larger than that of the through hole is formed at the end of the riveting part in a riveting mode, and the outer end face of the closed section is tightly attached to and electrically connected with the end face of the fixing part. According to the utility model, the copper terminal is divided into the terminal connecting plug and the terminal mounting seat which are connected through riveting, any split body can be detached, maintained and replaced when being damaged, the problem that the integral terminal is completely replaced when being damaged is solved, and the terminal connecting plug is made of copper or copper alloy, and the terminal mounting seat is made of aluminum or aluminum alloy, so that the integral terminal is convenient to replace. The weight and the cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and more specifically, to an electric connecting device. 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 mating terminals to achieve electrical connection. The terminals are easily worn out during repeated plugging and unplugging with the mating terminals, which affects the charging effect. The worn terminals are usually replaced as a whole due to the inconvenience of maintenance, which wastes costs. Existing terminals are usually made of copper. Copper has good 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.

[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 an electrical connection device to solve the problems that traditional terminals are very likely to wear out during repeated insertion and removal with mating terminals, thus affecting the charging effect, damaged terminals are usually replaced as a whole due to the inconvenience of maintenance, and copper terminals are costly and heavy.

[0005] According to the utility model, an electrical connection device is provided, which can be installed on a fixing device and used for plugging with a plug-in terminal, comprising a terminal plug connector and a terminal mounting seat.

[0006] The terminal plug connector includes a closed section with a through hole in the center, and a plurality of elastic arms axially extending from the outer periphery of the closed section, wherein the plurality of elastic arms surround and together with the closed section form a plug-in cavity for plugging with the plug-in terminal.

[0007] The terminal mounting seat includes a riveted portion, a fixed portion and a wiring portion connected in sequence, the riveted portion protrudes from the end face of the fixed portion and passes through the through hole, and the end of the riveted portion is riveted to form a rivet joint whose radial dimension is larger than the radial dimension of the through hole, so that the outer end face of the closed section is tightly fitted with the end face of the fixed portion and electrically connected.

[0008] Optionally, the terminal connector is made of copper or copper alloy, the terminal mounting seat is made of aluminum or aluminum alloy, and a coating is provided at least on an end surface of the fixing portion and on at least a portion of an outer peripheral surface of the riveted portion.

[0009] Optionally, at least one mounting groove is provided on the outer peripheral surface of the fixing portion for clamping and fixing with the fixing device and / or installing a sealing ring.

[0010] Optionally, the closed section is provided with a conductive transition layer at least on the peripheral surfaces at both ends of the through hole and the inner wall of the through hole, and the terminal mounting seat is electrically connected to the terminal plug connector through the conductive transition layer.

[0011] Optionally, at least one anti-rotation groove is further provided on the side wall of the through hole, and the riveted portion at least partially enters into the anti-rotation groove after riveting.

[0012] Optionally, a countersunk hole is provided at one end of the through hole facing the rivet head, and the rivet head is at least partially located in the countersunk hole.

[0013] Optionally, the closing section is provided with at least one protrusion or depression on the peripheral surfaces at both ends of the through hole, and the riveted portion is at least partially invaded by the protrusion or at least partially enters into the depression after riveting.

[0014] Optionally, the terminal plug connector is integrally formed by stamping and curling a plate, and the terminal mounting seat is integrally formed by machining or cold heading.

[0015] Optionally, a plurality of the elastic arms are arranged at intervals along the circumference of the closed section, and the inner diameter of the plug-in cavity gradually decreases along the direction from the closed section to the free end of the elastic arm.

[0016] Optionally, the end of the elastic arm is bent outwardly in a direction gradually away from the axis of the terminal plug connector and surrounds to form a guide portion.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model divides an integral terminal into a terminal plug connector and a terminal mounting seat, the terminal plug connector comprises a closed section with a through hole in the center, and a plurality of elastic arms axially extending from the outer periphery of the closed section, the plurality of elastic arms surround and together with the closed section form an inserting cavity for inserting with the mating terminal, the terminal mounting seat comprises a riveted portion, a fixing portion and a wiring portion connected in sequence, the riveted portion protrudes from the end face of the fixing portion and passes through the through hole, the terminal mounting seat and the terminal plug connector are connected together and electrically connected by a riveting process, and if either of the terminal mounting seat and the terminal plug connector is damaged, the two can be separated, repaired and replaced separately, and then riveted together again for continued use, thereby solving the problem that the integrated terminal is very easy to be worn out during repeated plugging and unplugging with the mating terminal, resulting in the inability to be disassembled for repair and usually being replaced as a whole.

[0019] 2. Traditional integrated terminals are usually made of copper. 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. The terminal plug connector of the electrical connection device of the utility model is made of copper or copper alloy, and the terminal mounting seat is made of aluminum or aluminum alloy, which not only reduces costs but also reduces the weight of the terminal, achieves lightweight, and improves the overall service life. Moreover, the currently common copper wiring terminals are connected to the aluminum conductive part of the cable, and the copper terminal and the aluminum wire are directly connected and contacted to cause electrochemical corrosion. The device is connected to the aluminum or aluminum alloy conductive part of the cable through the wiring part on the terminal mounting seat made of aluminum or aluminum alloy, which solves the problem of electrochemical corrosion caused by the direct connection and contact between the traditional copper terminal and the aluminum wire, and improves the overall service life of the terminal.

[0020] 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

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the structure of an electrical connection device of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the terminal plug connector of the utility model;

[0024] Figure 3 This is a schematic structural diagram of the terminal plug connector of the utility model from another angle;

[0025] Figure 4 This is a schematic diagram of the structure of the terminal mounting seat of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the anti-rotation groove of the utility model;

[0027] Figure 6 This is a schematic cross-sectional view of an electrical connection device of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure in which the riveted head of the utility model is at least partially located in the countersunk hole;

[0029] Figure 8 The utility model is a structural schematic diagram of a closed section in which at least one protrusion or depression is arranged on the peripheral surfaces at both ends of the through hole.

[0030] The following are marked in the figure:

[0031] 1. Terminal plug connector; 11. Elastic arm; 111. Guide portion; 12. Enclosed section; 121. Through hole 1211. Anti-rotation groove; 122. Protrusion or depression; 2. Terminal mounting seat; 21. Fixing portion; 211. Mounting groove; 212. Riveted portion; 213. Riveted joint; 22. Wiring portion. DETAILED DESCRIPTION

[0032] 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.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0034] 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.

[0035] 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.

[0036] According to the first aspect of the present utility model, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 As shown, an electrical connection device is provided, which can be installed on a fixing device for plugging with a plug-in terminal, comprising a terminal plug connector 1 and a terminal mounting seat 2, wherein the terminal plug connector 1 comprises a closed section 12 having a through hole 121 at the center, and a plurality of elastic arms 11 axially extending from the outer periphery of the closed section 12, wherein the plurality of elastic arms 11 surround and together with the closed section 12 form a plug-in cavity for plugging with the plug-in terminal, and the terminal mounting seat 2 comprises a riveted portion 212, a fixing portion 21 and a wiring portion 22 connected in sequence, wherein the riveted portion 212 protrudes from the end face of the fixing portion 21 and passes through the through hole 121, and the end of the riveted portion 212 is riveted to form a rivet head 213 having a radial dimension greater than that of the through hole 121, so that the outer end face of the closed section 12 is tightly fitted with the end face of the fixing portion 21 and electrically connected.

[0037] 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. The terminal plug-in part is very easy to wear during the repeated plugging and unplugging process with the plug-in terminals, which affects the charging effect. The worn terminals are usually replaced as a whole due to the inconvenience of maintenance, which wastes costs.

[0038] The utility model divides the integral terminal into a terminal plug connector 1 and a terminal mounting seat 2, and connects the terminal mounting seat 2 and the terminal plug connector 1 together and electrically connects them through a riveting process. If either the terminal mounting seat 2 or the terminal plug connector 1 is damaged, the two can be separated, repaired and replaced separately, and then riveted together again for continued use, thereby solving the problem that the integrated terminal is very likely to be worn out during repeated plugging and unplugging with the plug-in terminal, thereby affecting the charging effect, and the terminal cannot be disassembled after being damaged, is inconvenient to repair, and is usually replaced as a whole, thereby improving the overall service life of the terminal.

[0039] Generally, riveting methods are divided into press riveting and spin riveting. Press riveting is to compress the rivet head to make it expand, and the rivet head and the workpiece form a strong connection structure. The spin riveting process drives the rivet head inward by rotation, so that its nail body shrinks and generates contact force with the workpiece. The rivet head of the spin riveting process can continue to shrink after contacting the workpiece, exerting greater pressure on the contact surface, thus forming a strong connection structure.

[0040] The specific riveting process is to crimp the end of the riveted portion 212 passing through the through hole 121 to form a riveted head 213 with a diameter larger than the through hole 121. After riveting, the riveted portion 212 is roughened and fills the through hole 121, and is in full contact with the inner wall of the through hole 121. The riveted head 213 and the terminal plug connector 1 form a strong connection structure, which also makes the outer end face of the closed section 12 and the end face of the fixed portion 21 fit tightly and electrically connected. The terminal plug connector 1 and the terminal mounting seat 2 are not easy to loosen from each other, and the safety is good. In addition, no auxiliary materials are required in the riveting process, and the two can be firmly connected together without secondary processing.

[0041] In some embodiments, the terminal connector 1 is made of copper or copper alloy, the terminal mounting base 2 is made of aluminum or aluminum alloy, and a coating is provided at least on the end surface of the fixing portion 21 and on at least part of the outer circumference of the riveted portion 212 .

[0042] Terminals are usually made of copper, which 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. The utility model changes the integrated copper terminal into a split type, the material of the terminal plug connector 1 is copper or copper alloy, and the material of the terminal mounting seat 2 is aluminum or aluminum alloy, which not only reduces costs but also reduces the weight of the terminal, achieving lightweight.

[0043] Moreover, the copper terminal commonly used at present is connected with the aluminum conductive part of the cable, and the copper terminal and the aluminum wire are directly connected and contacted to cause electrochemical corrosion. The utility model adopts the connection part 22 on the terminal mounting seat 2 made of aluminum or aluminum alloy to connect with the aluminum or aluminum alloy conductive part of the cable, which solves the problem of electrochemical corrosion caused by the direct connection and contact between the traditional copper terminal and the aluminum wire, and improves the overall service life of the terminal;

[0044] Furthermore, a coating is provided on the end surface of the fixing portion 21 and on at least a portion of the outer circumference of the riveted portion 212 , so as to increase the wear resistance and corrosion resistance of the fixing portion 21 and the riveted portion 212 and extend the overall service life of the electrical connection device.

[0045] In some embodiments, Figure 4 As shown, at least one mounting groove 211 is provided on the outer circumferential surface of the fixing portion 21 for clamping and fixing with the fixing device and / or installing a sealing ring.

[0046] The mounting groove 211 can be engaged with the fixing device to fix the terminal mounting seat 2 on the fixing device, and then fix the electrical connection device as a whole 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 211 to seal the gap between the terminal and the mounting device to prevent moisture and impurities from entering the terminal plug connector 1 and causing electrical risks after the plug-in terminal and the terminal plug connector 1 are plugged in.

[0047] In some embodiments, the closed section 12 is provided with a conductive transition layer at least on the peripheral surfaces at both ends of the through hole 121 and the inner wall of the through hole 121, and the terminal mounting seat 2 is electrically connected to the terminal plug connector 1 through the conductive transition layer.

[0048] When the material potential difference between the terminal connector 1 and the terminal mounting seat 2 is large, for example, the material of the terminal connector 1 is copper or copper alloy, and the material of the terminal mounting seat 2 is aluminum or aluminum alloy, after the terminal connector 1 and the terminal mounting seat 2 are riveted, the problem of electrochemical corrosion between the two occurs due to the potential difference. In order to reduce the influence of electrochemical corrosion, a conductive transition layer is provided on the closed section 12 at least on the peripheral surfaces at both ends of the through hole 121 and on the inner wall of the through hole 121. In one case, the material of the conductive transition layer is a metal material with a potential between the material of the terminal connector 1 and the material of the terminal mounting seat 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.

[0049] In some embodiments, Figure 5 As shown, at least one anti-rotation groove 1211 is further provided on the side wall of the through hole 121 , and the riveted portion 212 at least partially enters into the anti-rotation groove 1211 after riveting.

[0050] An anti-rotation groove 1211 is provided on the side wall of the through hole 121. The provision of the anti-rotation groove 1211 can strengthen the connection between the riveted portion 212 and the terminal plug connector 1, and can also prevent the riveted portion 212 from rotating in the through hole 121 after the terminal plug connector 1 is riveted to the terminal mounting seat 2.

[0051] In some embodiments, Figure 7 As shown, a countersunk hole is provided at one end of the through hole 121 facing the rivet head 213 , and the rivet head 213 is at least partially located in the countersunk hole.

[0052] The design of the countersunk hole fixes the rivet joint 213, so that the terminal mounting seat 2 and the terminal plug joint 1 are more firmly connected after riveting, and at the same time, the contact area between the terminal plug joint 1 and the terminal mounting seat 2 is increased, and the electrical and thermal conductivity are better.

[0053] In some embodiments, Figure 8 As shown, the closed section 12 is provided with at least one protrusion or depression 122 on the peripheral surfaces at both ends of the through hole 121, and the riveted portion 212 is at least partially invaded by the protrusion or at least partially enters into the depression after riveting.

[0054] The closed section 12 is provided with at least one protrusion or depression 122 on the peripheral surface of both ends of the through hole 121. The riveted portion 212 of the terminal mounting seat 2 is deformed by force during the riveting process, and its shape adapts to the protrusion or depression and is tightly combined, thereby increasing the contact area between the terminal plug connector 1 and the terminal mounting seat 2, making the conductive effect between the two better, and the protrusions and depressions that invade each other make it difficult for the terminal mounting seat 2 and the terminal plug connector 1 to rotate relative to each other, reducing the possibility of loosening of the joint surface between the two, and avoiding the problem of increased contact resistance and heat generation of the joint surface. The number of protrusions or depressions can be set according to the actual needs of use.

[0055] In some embodiments, the terminal plug connector 1 is integrally formed by stamping and curling a plate, and the terminal mounting seat 2 is integrally formed by machining or cold heading.

[0056] In this embodiment, the terminal plug connector 1 can be integrally formed by stamping and curling a plate, and the terminal mounting seat 2 can be integrally formed by machining, or the terminal plug connector 1 can be integrally formed by stamping and curling a plate, and the terminal mounting seat 2 can be integrally formed by cold heading.

[0057] In some embodiments, Figure 1-3 As shown, the plurality of elastic arms 11 are arranged at intervals along the circumference of the closed section 12 , and the inner diameter of the plug-in cavity gradually decreases along the direction from the closed section 12 to the free end of the elastic arm 11 .

[0058] The design of this structure is to better clamp the plug-in terminals and ensure good electrical connectivity.

[0059] In some embodiments, Figure 3 As shown, the end of the elastic arm 11 is bent outwardly in a direction gradually away from the axis of the terminal plug connector 1 and surrounds to form a guide portion 111.

[0060] The guide portion 111 can guide the plug-in terminal to be inserted into the plug-in cavity and electrically connected to the terminal plug connector 1 .

[0061] 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. An electrical connection device, which can be mounted on a fixing device and used for plugging with a plug-in terminal, characterized in that: Includes terminal plug connector and terminal mounting base, The terminal plug connector includes a closed section with a through hole in the center, and a plurality of elastic arms axially extending from the outer periphery of the closed section, wherein the plurality of elastic arms surround and together with the closed section form a plug-in cavity for plugging with the plug-in terminal. The terminal mounting seat includes a riveted portion, a fixed portion and a wiring portion connected in sequence, the riveted portion protrudes from the end face of the fixed portion and passes through the through hole, and the end of the riveted portion is riveted to form a rivet joint whose radial dimension is larger than the radial dimension of the through hole, so that the outer end face of the closed section is tightly fitted with the end face of the fixed portion and electrically connected.

2. An electrical connection device according to claim 1, characterized in that: The terminal plug connector is made of copper or copper alloy, the terminal mounting seat is made of aluminum or aluminum alloy, and a plating layer is provided at least on the end surface of the fixing portion and at least part of the outer peripheral surface of the riveting portion.

3. An electrical connection device 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. An electrical connection device according to claim 1, characterized in that: The closed section is provided with a conductive transition layer at least on the peripheral surfaces at both ends of the through hole and the inner wall of the through hole, and the terminal mounting seat is electrically connected to the terminal plug connector through the conductive transition layer.

5. An electrical connection device according to claim 1, characterized in that: The side wall of the through hole is further provided with at least one anti-rotation groove, and the riveted portion at least partially enters into the anti-rotation groove after riveting.

6. An electrical connection device according to claim 1, characterized in that: A countersunk hole is arranged at one end of the through hole facing the rivet head, and the rivet head is at least partially located in the countersunk hole.

7. An electrical connection device according to claim 1, characterized in that: The closing section is provided with at least one protrusion or depression on the peripheral surfaces at both ends of the through hole, and the riveted portion is at least partially invaded by the protrusion or at least partially enters into the depression after riveting.

8. An electrical connection device according to claim 1, characterized in that: The terminal plug connector is integrally formed by stamping and curling a plate, and the terminal mounting seat is integrally formed by machining or cold heading.

9. An electrical connection device according to claim 1, characterized in that: The plurality of elastic arms are arranged at intervals along the circumference of the closed section, and the inner diameter of the plug-in cavity gradually decreases along the direction from the closed section to the free end of the elastic arm.

10. An electrical connection device according to claim 1, characterized in that: The end of the elastic arm is bent outwardly in a direction gradually away from the axis of the terminal plug connector and surrounds to form a guide portion.

Images