Terminal

Abstract

The terminal comprises a first terminal split body, a second terminal split body and a bolt, two ends of the cylindrical first terminal split body are respectively constructed into a plugging end and a rotary extension end, the rotary extension end is provided with a closed end face, the second terminal split body comprises a butt joint end and a wiring end which are connected with each other, the end face of the butt joint end is provided with a mounting hole, and the bolt is arranged in the mounting hole. A threaded hole is formed in the bottom wall of the mounting hole, the rotary extending end is inserted into the mounting hole, the end face of the rotary extending end abuts against the bottom wall of the mounting hole, a bolt penetrates through a through hole in the center of the closed end face to be in threaded connection with the threaded hole, and matched clamping structures are arranged on the peripheral face of the rotary extending end and the side wall of the mounting hole. Therefore, the first terminal split body and the second terminal split body are prevented from being separated and electrical connection is kept. According to the utility model, an integrated terminal is changed into a two-body type terminal, any one split body can be detached, maintained and replaced after being damaged, the problem that all the integrated terminal is replaced when being damaged is solved, the first terminal split body is made of copper or copper alloy, and the second terminal split 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 mating terminals to achieve electrical connection. During the repeated plugging and unplugging of the mating terminals, it is very easy to cause wear and affect the charging effect. The worn traditional one-piece terminals are usually replaced as a whole due to the inconvenience of maintenance. In addition, the terminals are generally made of copper materials. 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.

[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 terminals are very likely to wear out during repeated plugging and unplugging with matching terminals, thus affecting the charging effect, and the worn terminals are usually replaced as a whole due to the inconvenience of maintenance, as well as the problems of high cost and heavy weight of one-piece copper terminals.

[0005] According to the utility model, a terminal is provided, including a first terminal split, a second terminal split and a bolt, one end of the first terminal split is configured as an inserting end with an inserting cavity for inserting a mating terminal, and the other end is configured as a screw-in end with a closed end face, a through hole is arranged at the center of the closed end face, the second terminal split includes an interconnected butt end and a wiring terminal, the end face of the butt end is provided with a mounting hole, the bottom wall of the mounting hole is provided with a threaded hole coaxial with the through hole, the screw-in end is inserted into the mounting hole with an interference fit therebetween, and the end face of the screw-in end abuts against the bottom wall of the mounting hole and is screwed to the threaded hole through the through hole with the bolt, and a matching clamping structure is arranged on the outer peripheral surface of the screw-in end and the side wall of the mounting hole to prevent the first terminal split from being separated from the second terminal split and maintain electrical connection.

[0006] Optionally, the outer diameter of the rotating end is smaller than the outer diameter of the plug end, so that a step surface is formed between the two, the outer diameter of the butt end is the same as the outer diameter of the plug end, and the end face of the butt end abuts against the step surface.

[0007] Optionally, the clamping structure is at least one anti-clamping spring sheet provided on the outer wall of the rotating extension end, and at least one clamping groove radially opened and penetrating from the side wall of the mounting hole and clamped with the anti-clamping spring sheet.

[0008] Optionally, there are multiple anti-card spring sheets and multiple card slots, and the multiple anti-card spring sheets and the card slots are circumferentially spaced apart on the outer wall of the rotationally extended end and the side wall of the mounting hole.

[0009] Optionally, the first terminal body is made of copper or copper alloy, the second terminal body is made of aluminum or aluminum alloy, and a plating layer is provided at least on the side wall and the bottom wall of the mounting hole.

[0010] Optionally, the first terminal body is integrally formed by stamping and curling a plate, and the second terminal body is integrally formed by machining or cold heading.

[0011] Optionally, a plurality of spring sheets which are radially punched inward and have bent portions are provided on the outer wall of the plug-in end near the free end, and the plurality of spring sheets are circumferentially spaced apart on the outer wall of the plug-in end, and the outer wall of the mating terminal abuts against and is electrically connected to the minimum inner diameter surrounded by the plurality of bent portions.

[0012] Optionally, a plurality of protective sheets bent inwardly and facing the rotational extension end are provided at the free end of the plug-in end, the plurality of protective sheets are circumferentially spaced apart on the plug-in end, and the minimum inner diameter surrounded by the plurality of protective sheets is greater than or equal to the minimum inner diameter surrounded by the plurality of bent portions.

[0013] Optionally, it also includes a protective shell with a clamping arm that is sleeved on the plug-in end, the clamping arm is provided with an elastic pressure sheet corresponding to the spring sheet one by one, the elastic pressure sheet is provided with a curved portion protruding toward the axial direction of the plug-in cavity, and the inner wall of the curved portion abuts against the outer wall of the bent portion to strengthen the clamping force of the bent portion on the outer wall of the mating terminal.

[0014] Optionally, at least one protruding point and at least one snap-in piece are stamped on the side wall of the protective shell, and a positioning hole and a snap-in hole are set on the outer wall of the plug-in end. After the protective shell is sleeved on the plug-in end, the protruding point enters the positioning hole for positioning, and the free end of the snap-in piece is bent and extends into the snap-in hole to axially position the protective shell and the plug-in end.

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

[0016] 1. The utility model divides the integral terminal into a first terminal part and a second terminal part, and the two are connected together by a clamping structure and bolts. When any part is damaged, the bolts can be removed to separate the two, which is convenient for maintenance and replacement. This solves the problem that the integral terminal is very easy to wear during repeated plugging and unplugging with the matching terminal, thus affecting the charging effect, and the worn terminal is usually replaced as a whole due to the inconvenience of maintenance.

[0017] 2. Traditional one-piece 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 utility model changes the one-piece copper terminal into a first terminal split made of copper or copper alloy and a second terminal split made of aluminum or aluminum alloy. Aluminum material is cheaper and lighter than copper material, which not only reduces costs but also reduces the weight of the terminal to achieve lightweight. The currently common copper terminal is 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 utility model uses a second terminal split made of aluminum or aluminum alloy to connect to the aluminum or aluminum alloy conductive part of the cable, which solves the problem of electrochemical corrosion caused by direct connection and contact between the traditional copper terminal and the aluminum wire, thereby improving the overall service life of the terminal.

[0018] 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

[0019] 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.

[0020] Figure 1 This is a schematic cross-sectional view of a terminal of the utility model;

[0021] Figure 2 This is a schematic diagram of the exploded structure of a terminal of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first terminal split body of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the second terminal split body of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the terminal with a protective shell of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the protective shell of the utility model;

[0026] Figure 7 It is a schematic structural diagram of a cross-section of a terminal with a protective shell according to the present invention.

[0027] The following are marked in the figure:

[0028] 1. The first terminal is split; 11. The rotating end; 111. The anti-card spring piece; 112. The closed end face; 1121. The through hole; 12. The plug-in end; 121. The positioning; 122. The card hole; 123. The spring piece; 124. The plug-in cavity; 125. The protective sheet; 2. The second terminal is split; 21. The docking end; 212. The mounting hole; 213. The card slot; 214. The threaded hole; 22. The wiring terminal; 3. The bolt; 4. The protective shell; 41. The elastic pressure piece; 42. The bump; 43. The card sheet. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] According to the first aspect of the present utility model, Figure 1-Figure 7 As shown, a terminal is provided, including a first terminal split body 1, a second terminal split body 2 and a bolt 3, one end of the first terminal split body 1 is configured as a plug-in end 12 with a plug-in cavity 124 for inserting a mating terminal, and the other end is configured as a screw-in end 11 with a closed end face 112, the center of the closed end face 112 is provided with a through hole 1121, the second terminal split body 2 includes an interconnected butt end 21 and a wiring terminal 22, the end face of the butt end 21 is provided with a mounting hole 212, and the mounting hole 212 is provided with a through hole 1121. The bottom wall is provided with a threaded hole 214 coaxial with the through hole 1121, the screw-in end 11 is inserted into the mounting hole 212 with an interference fit therebetween, and the end face of the screw-in end 11 abuts against the bottom wall of the mounting hole 212 and is screwed through the through hole 1121 and connected to the threaded hole 214 with the bolt 3, and the outer peripheral surface of the screw-in end 11 and the side wall of the mounting hole 212 are provided with matching snap-fit ​​structures to prevent the first terminal body 1 from detaching from the second terminal body 2 and maintain electrical connection.

[0034] 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 stations are mainly used to transmit electrical signals or conduct electricity. The terminals need to be plugged into the mating terminals to achieve electrical connection. During the repeated plugging and unplugging process with the mating 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.

[0035] The utility model divides the integral terminal into a first terminal split body 1 and a second terminal split body 2, and the two are connected together by a clamping structure and a bolt 3. When either split body is damaged, the bolt 3 can be removed to separate the two, which is convenient for maintenance and replacement. The utility model solves the problem that the integral terminal is very likely to be worn out during repeated plugging and unplugging with the mating 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.

[0036] In addition, matching snap-fit ​​structures are provided on the outer surface of the rotating end 11 and the side wall of the mounting hole 212 at the fixed end of the second terminal body 2, which can prevent the first terminal body 1 from being separated from the second terminal body 2 and maintain electrical connection. A second snap-fit ​​structure is added on the basis of the bolt 3 connection to ensure the stability of the connection between the two and the safety of electricity use during use.

[0037] In some embodiments, Figure 1-Figure 3 As shown, the outer diameter of the rotational extension end 11 is smaller than the outer diameter of the plug end 12, so that a step surface is formed therebetween. The outer diameter of the docking end 21 is the same as that of the plug end 12, and the end face of the docking end 21 abuts against the step surface.

[0038] This design is to make the outer surface of the first terminal split 1 and the second terminal split 2 a smooth and continuous outer surface after being connected, which not only has a beautiful appearance, but also the first terminal split 1 and the second terminal split 2 can be processed and formed with raw materials of the same diameter, which is easy to process and purchase.

[0039] In some embodiments, Figure 1-Figure 2 As shown, the clamping structure is at least one anti-clamping spring piece 111 opened on the outer wall of the rotating extension end 11 , and at least one clamping groove 213 radially opened and penetrated from the side wall of the mounting hole 212 and clamped with the anti-clamping spring piece 111 .

[0040] The anti-locking spring piece 111 is locked with the locking groove 213, so that the first terminal body 1 and the second terminal body 2 are firmly connected to prevent the first terminal body 1 from being separated from the second terminal body 2 and maintain electrical connection.

[0041] In some embodiments, Figure 1-Figure 2As shown, there are multiple anti-card spring pieces 111 and multiple card slots 213, and the multiple anti-card spring pieces 111 and the card slots 213 are circumferentially spaced apart on the outer wall of the rotationally extending end 11 and the side wall of the mounting hole 212.

[0042] A plurality of anti-card spring pieces 111 and card slots 213 are circumferentially spaced apart on the outer wall of the rotating extension end 11 and the side wall of the mounting hole 212, which can strengthen the connection between the first terminal body 1 and the second terminal body 2 and ensure that the first terminal body 1 and the second terminal body 2 maintain stable electrical connection.

[0043] In some embodiments, the first terminal body 1 is made of copper or copper alloy, the second terminal body 2 is made of aluminum or aluminum alloy, and a plating layer is provided at least on the side wall and the bottom wall of the mounting hole 212 .

[0044] At present, copper is generally used to make integrated copper 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. The first terminal body 1 of the utility model is made of copper or copper alloy, and the second terminal body 2 is made of aluminum or aluminum alloy. Aluminum material is lower in cost and lighter in weight than copper material, which not only reduces costs but also reduces the overall weight of the terminal to achieve lightweight.

[0045] At present, copper terminals are often used to connect with the aluminum conductive part of the cable. The copper terminal and the aluminum wire are directly connected and contacted to cause electrochemical corrosion. The utility model uses a second terminal split body 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;

[0046] In addition, a plating layer is provided on at least the side walls and the bottom wall of the mounting hole 212, so that the wear resistance of the mounting hole 212 can be increased, and the mounting hole 212 of the fixed end can be prevented from being worn due to friction between the rotating end 11 and the inner wall and the bottom wall of the mounting hole 212 during use, thereby extending the service life of the second terminal.

[0047] In some embodiments, the first terminal body 1 is integrally formed by stamping and curling a plate, and the second terminal body 2 is integrally formed by machining or cold heading.

[0048] In this embodiment, the first terminal body 1 can be integrally formed by stamping and curling a plate, and the second terminal body 2 can be integrally formed by machining, or the first terminal body 1 can be integrally formed by stamping and curling a plate, and the second terminal body 2 can be integrally formed by cold heading.

[0049] In some embodiments, Figure 2-Figure 3 As shown, a plurality of spring sheets 123 with radially inwardly stamped parts and having bent parts are provided on the outer wall of the plug end 12 near the free end. The plurality of spring sheets 123 are circumferentially spaced apart on the outer wall of the plug end 12, and the outer wall of the mating terminal abuts against and is electrically connected to the minimum inner diameter surrounded by the plurality of bent parts.

[0050] The minimum inner diameter surrounded by the bent parts of the multiple spring pieces 123 abuts against the mating terminal, which can increase the clamping force of the plug-in end 12 of the first terminal body 1 on the mating terminal and ensure better electrical connection between the two.

[0051] In some embodiments, Figure 2 and Figure 7 As shown, the free end of the plug-in end 12 is provided with a plurality of protective sheets 125 which are bent inwardly and face the rotational extension end 11. The plurality of protective sheets 125 are arranged circumferentially at intervals on the plug-in end 12, and the minimum inner diameter surrounded by the plurality of protective sheets 125 is greater than or equal to the minimum inner diameter surrounded by the plurality of bent portions.

[0052] The design of the protective sheet 125 can protect the free end of the plug-in terminal 12 during the process of inserting the mating terminal into the plug-in cavity 124 .

[0053] In some embodiments, Figure 2 and Figure 7 As shown, it also includes a protective shell 4 with a clamping arm that is sleeved on the plug-in end 12, and the clamping arm is provided with an elastic pressure piece 41 corresponding to the spring piece 123 one by one, and the elastic pressure piece 41 is provided with a curved portion protruding toward the axial direction of the plug-in cavity 124, and the inner wall of the curved portion abuts against the outer wall of the bent portion to strengthen the clamping force of the bent portion on the outer wall of the mating terminal.

[0054] The elastic pressing piece 41 with the bent portion on the protective shell 4 can increase the clamping force of the elastic piece 123 on the outer wall of the mating terminal, so that the electrical connection between the terminal and the mating terminal is more stable.

[0055] In some embodiments, Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, at least one protrusion 42 and at least one snap-in piece 43 are stamped on the side wall of the protective shell 4, and a positioning hole 121 and a snap-in hole 122 are set on the outer wall of the plug-in end 12. After the protective shell 4 is sleeved on the plug-in end 12, the protrusion 42 enters the positioning hole 121 for positioning 121, and the free end of the snap-in piece 43 is bent and extends into the snap-in hole 122, so that the protective shell 4 and the plug-in end 12 are axially positioned 121.

[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, characterized in that: It includes a first terminal split body, a second terminal split body and a bolt, One end of the first terminal body is configured as a plug-in end with a plug-in cavity for inserting a mating terminal, and the other end is configured as a screw-in end with a closed end surface, wherein a through hole is provided at the center of the closed end surface. The second terminal body comprises an interconnected butt end and a wiring end, the butt end has an end surface with a mounting hole, and the bottom wall of the mounting hole is provided with a threaded hole coaxial with the through hole. The screw-in end is inserted into the mounting hole with an interference fit therebetween, and the end face of the screw-in end abuts against the bottom wall of the mounting hole and is screwed through the through hole and connected to the threaded hole with the bolt, and matching snap-in structures are provided on the outer peripheral surface of the screw-in end and the side wall of the mounting hole to prevent the first terminal body from detaching from the second terminal body and maintain electrical connection.

2. A terminal according to claim 1, characterized in that: The outer diameter of the rotationally extended end is smaller than the outer diameter of the plug end, so that a step surface is formed between the two. The outer diameter of the butt end is the same as the outer diameter of the plug end, and the end face of the butt end abuts against the step surface.

3. A terminal according to claim 1, characterized in that: The clamping structure is at least one anti-clamping spring sheet provided on the outer wall of the rotating extension end, and at least one clamping groove radially opened and penetrating from the side wall of the mounting hole and clamped with the anti-clamping spring sheet.

4. A terminal according to claim 3, characterized in that: There are multiple anti-card spring sheets and multiple card slots, and the multiple anti-card spring sheets and the card slots are circumferentially spaced apart on the outer wall of the rotationally extended end and the side wall of the mounting hole.

5. A terminal according to claim 1, characterized in that: The material of the first terminal body is copper or copper alloy, the material of the second terminal body is aluminum or aluminum alloy, and a plating layer is provided at least on the side wall and the bottom wall of the mounting hole.

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

7. A terminal according to claim 1, characterized in that: A plurality of spring sheets with bent portions which are punched radially inward are provided on the outer wall of the plug-in end near the free end. The plurality of spring sheets are circumferentially spaced apart on the outer wall of the plug-in end. The outer wall of the mating terminal abuts against and is electrically connected to the minimum inner diameter surrounded by the plurality of bent portions.

8. A terminal according to claim 7, characterized in that: The free end of the plug-in end is provided with a plurality of protective sheets bent inwardly and facing the rotationally extending end, the plurality of protective sheets are circumferentially spaced on the plug-in end, and the minimum inner diameter surrounded by the plurality of protective sheets is greater than or equal to the minimum inner diameter surrounded by the plurality of bent portions.

9. A terminal according to claim 7, characterized in that: It also includes a protective shell with a clamping arm that is sleeved on the plug-in end, the clamping arm is provided with an elastic pressure sheet corresponding to the spring sheet one by one, the elastic pressure sheet is provided with a curved portion protruding toward the axial direction of the plug-in cavity, the inner wall of the curved portion abuts against the outer wall of the bent portion to strengthen the clamping force of the bent portion on the outer wall of the mating terminal.

10. A terminal according to claim 9, characterized in that: At least one protruding point and at least one snap-in piece are stamped on the side wall of the protective shell, and a positioning hole and a snap-in hole are set on the outer wall of the plug-in end. After the protective shell is sleeved on the plug-in end, the protruding point enters the positioning hole for positioning, and the free end of the snap-in piece is bent and extends into the snap-in hole to axially position the protective shell and the plug-in end.

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