A quick wiring copper-aluminum terminal

Abstract

The utility model discloses a kind of fast wiring copper-aluminum terminals, comprising: terminal post, terminal post is copper-aluminum composite structure, including integrally formed aluminum conductor section, copper conductor section and the copper-aluminum transition alloy layer being arranged between two sections, the inner ring part inner wall of aluminum conductor section is equipped with oxidation-resistant coating;The outer surface of terminal post is inlaidly provided with threaded groove, the outer surface of threaded groove is screw-threaded installed with nut, the threaded groove of terminal post four sides is all provided with extrusion port, and the extrusion port is fixedly connected with crimping mechanism. The design of the present application through crimping mechanism, without using large electric tool in the process of wiring, save the time of large electric tool of handling, assembly, debugging, operating personnel only need to carry ordinary wrench to complete wiring operation, reduce the time consumption of tool preparation link, simultaneously, single terminal wiring process is simplified, avoid additional steps such as electric tool starting, change and connect, substantially shorten single group wiring time, improve overall construction progress.

Description

Technical Field

[0001] This utility model relates to the field of copper-aluminum terminal technology, specifically a quick-connect copper-aluminum terminal. Background Technology

[0002] Copper-aluminum terminals are used for copper-aluminum transitions between aluminum alloy cables and copper connection structures in equipment. This prevents direct contact between the copper connection structure and the aluminum alloy cable, which could lead to corrosion and serious accidents. For example, copper-aluminum terminals used in reactors typically consist of both aluminum and copper conductors. The aluminum conductor is usually cylindrical with an internal hole to accommodate the conductor core.

[0003] For example, the national authorized patent announcement number CN213753113U discloses a copper-aluminum terminal. This copper-aluminum terminal includes an aluminum conductor, one end of which is connected to a copper conductor, and the other end has an inner hole. The sidewall of the inner hole includes two concave arc surfaces and two flat surfaces. The two arc surfaces are arranged opposite each other; the two flat surfaces are respectively connected to the same end of the two arc surfaces, and the two flat surfaces are parallel. This copper-aluminum terminal can improve the tightness of the connection between itself and the inner core of the conductor.

[0004] However, the aforementioned copper and aluminum terminals, when using traditional crimping or screw fastening methods, require the use of crimping pliers to apply external force to fix the wires. In large-scale wiring scenarios such as substations and photovoltaic arrays, this type of operation increases construction time and is significantly limited by operating space, resulting in low wiring efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a quick-connect copper-aluminum terminal to solve the problems mentioned in the background art, which require special tools such as crimping pliers and screwdrivers when using crimping or screw fastening methods. These methods result in long construction time in large-scale wiring scenarios such as substations and photovoltaic arrays, and low wiring efficiency due to limited operating space.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A quick-connect copper-aluminum terminal includes: a terminal post, which is a copper-aluminum composite structure, comprising an integrally formed aluminum conductor segment, a copper conductor segment, and a copper-aluminum transition alloy layer disposed between the two segments; the inner wall of the inner ring of the aluminum conductor segment is provided with an anti-oxidation coating; the outer surface of the terminal post has an embedded threaded groove, and a nut is threaded onto the outer surface of the threaded groove; the threaded groove of the terminal post has a crimping port on all four sides, and a crimping mechanism is fixedly connected inside the crimping port; the crimping plate of the crimping mechanism is made of brass substrate and has a tin-nickel alloy layer plated on its surface.

[0008] Preferably, an L-shaped pressure ring is fixedly installed at one end of the nut. The L-shaped pressure ring can synchronously push the four sets of crimping mechanisms towards the terminal block through the extrusion port by rotating the nut on the outer surface of the thread groove. The L-shaped pressure ring is made of copper alloy to avoid electrochemical corrosion when it comes into contact with the copper conductor section of the terminal block.

[0009] Preferably, after the L-shaped pressure ring presses the crimping mechanism into the terminal block and rotates with the nut to the end of the threaded groove, the bent part at the end of the L-shaped pressure ring will hook onto the outer surface of one end of the crimping mechanism, thereby locking the position of the nut.

[0010] Preferably, the pressing mechanism includes a connecting plate, which is fixedly installed inside the pressing port. A top pressure plate is fixedly installed at one end of the connecting plate. The top pressure plate can be pressed by an L-shaped pressure ring driven by a rotating nut, and can also be hooked onto the outer surface by the L-shaped pressure ring.

[0011] Preferably, a pressure plate is fixedly installed on one end of the lower surface of the top pressure plate, and the pressure plate is located in the inner ring of the terminal block through the extrusion port.

[0012] Preferably, a bending arc groove is formed on the lower surface of the connection between the connecting plate and the top pressure plate.

[0013] Preferably, the pressure plate has an anti-slip texture on the side facing the conductor, and the texture depth of the pressure plate corresponding to the aluminum conductor segment is greater than the texture depth corresponding to the copper conductor segment, so as to adapt to the characteristics of aluminum conductors being easy to slide and copper conductors being easy to press.

[0014] Preferably, the copper-aluminum transition alloy layer is a copper-clad aluminum composite layer with a resistivity ≤0.05Ω·mm. 2 / m, tensile strength ≥120MPa, conforming to GB / T13140 standard.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The structural design, which guides the top pressure plate to bend in a directional manner through a bending arc groove and drives the wire clamping plates to move closer together, combined with the L-shaped pressure ring to squeeze and lock the top pressure plate, not only achieves convenient wiring operations that can be completed with just a regular wrench without the need for large power tools, greatly improving the adaptability and wiring efficiency in confined spaces, but also effectively avoids the contact problems caused by uneven force on traditional terminals by the synchronous and uniform clamping of the wires through four sets of wire clamping plates, combined with the continuous and stable clamping force after locking. At the same time, it reduces the risk of loosening caused by vibration and temperature changes when connecting copper and aluminum wires, ensuring the stability and reliability of efficient current conduction. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of the quick-connect copper-aluminum terminal of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall side cross-section of this utility model;

[0019] Figure 3 This is a schematic diagram of the pressing mechanism of this utility model.

[0020] In the diagram: 1. Terminal block; 101. Threaded groove; 102. Crimping port; 103. Nut; 104. L-shaped pressure ring; 2. Crimping mechanism; 201. Connecting plate; 202. Top pressure plate; 203. Wire pressing plate; 204. Bending arc groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-2 As shown, this embodiment provides a quick-connect copper-aluminum terminal, including: a terminal 1, which is a copper-aluminum composite structure, including an integrally formed aluminum conductor segment, a copper conductor segment, and a copper-aluminum transition alloy layer disposed between the two segments. The inner wall of the inner ring of the aluminum conductor segment is provided with an anti-oxidation coating. The outer surface of the terminal 1 is provided with an embedded threaded groove 101, and a nut 103 is threadedly installed on the outer surface of the threaded groove 101. The threaded groove 101 of the terminal 1 is provided with a crimping port 102 on all four sides. A crimping mechanism 2 is fixedly connected in the crimping port 102. The crimping plate 203 of the crimping mechanism 2 is made of brass substrate and the surface is plated with a tin-nickel alloy layer.

[0023] One end of the nut 103 is fixedly installed with an L-shaped pressure ring 104. The L-shaped pressure ring 104 can be rotated on the outer surface of the threaded groove 101 by the nut 103 to synchronously push the four sets of crimping mechanisms 2 to move towards the terminal block 1 through the extrusion port 102. The L-shaped pressure ring 104 is made of copper alloy to avoid electrochemical corrosion when it comes into contact with the copper conductor section of the terminal block 1.

[0024] In this process, the L-shaped pressure ring 104 presses the crimping mechanism 2 into the terminal post 1 and rotates with the nut 103 to the end of the threaded groove 101. Then, the bent part at the end of the L-shaped pressure ring 104 hooks onto the outer surface of one end of the crimping mechanism 2, thereby locking the position of the nut 103.

[0025] Through the design of the terminal block 1, threaded groove 101, crimping port 102, nut 103, L-shaped pressure ring 104, and crimping mechanism 2, in actual wiring operations, the wire to be connected is first inserted into the wire receiving channel of the terminal block 1, ensuring that the insertion depth of the wire end meets the conductive contact requirements. Then, the operator only needs to use a regular wrench to rotate the nut 103 on the threaded groove 101 on the outer surface of the terminal block 1, so that the nut 103 rotates along the threaded groove 101 towards the crimping mechanism 2. The L-shaped pressure ring 104, which is fixedly connected to one end of the nut 103, will... Synchronously following the movement of nut 103, during the movement, the inner wall of L-shaped pressure ring 104 gradually comes into contact with the four sets of crimping mechanisms 2 fixed inside the crimping port 102 of terminal 1. As nut 103 continues to rotate, L-shaped pressure ring 104 generates a uniform pushing force on the four sets of crimping mechanisms 2. Under the action of this pushing force, the four sets of crimping mechanisms 2 will synchronously move towards the inside of terminal 1 along the opening direction of crimping port 102 until the inner wall of crimping mechanism 2 tightly engages with the outer surface of the wire inserted into terminal 1, thus achieving the initial crimping of the wire. When the nut 103 continues to rotate to the end of the threaded groove 101, the bent part at the end of the L-shaped pressure ring 104 will hook onto the outer surface of one end of the crimping mechanism 2. At this time, the L-shaped pressure ring 104 cannot rotate with the nut 103, thus locking the position of the nut 103 and preventing the nut 103 from loosening due to vibration, temperature changes, or other factors during subsequent use. Finally, through the continuous pressing force of the crimping mechanism 2 on the wire and the locking effect of the L-shaped pressure ring 104 on the nut 103, a stable and reliable connection between the copper wire and the aluminum wire in the terminal block 1 is completed, ensuring that the current can be efficiently conducted through the terminal block 1. This eliminates the need for large power tools during wiring, especially in large-scale wiring scenarios such as substations and photovoltaic arrays. It saves the time spent on transporting, assembling, and debugging large power tools. Operators only need to carry an ordinary wrench to complete the wiring operation, reducing the time spent on tool preparation. At the same time, the wiring process of a single terminal is simplified, avoiding additional steps such as starting and replacing power tools, significantly shortening the wiring time of a single group and improving the overall construction progress.

[0026] like Figures 2-3 As shown, the crimping mechanism 2 includes a connecting plate 201, which is fixedly installed inside the crimping port 102. A top pressure plate 202 is fixedly installed at one end of the connecting plate 201. The top pressure plate 202 can be crimped by the L-shaped pressure ring 104 driven by the rotating nut 103, and can also be hooked onto the outer surface by the L-shaped pressure ring 104.

[0027] A pressure plate 203 is fixedly installed on one end of the lower surface of the top pressure plate 202, and the pressure plate 203 is located in the inner ring of the terminal 1 through the extrusion port 102. A bending arc groove 204 is formed on the lower surface of the connection between the connecting plate 201 and the top pressure plate 202. The side of the pressure plate 203 facing the conductor has an anti-slip texture, and the texture depth (0.2mm) of the pressure plate corresponding to the aluminum conductor section is greater than the texture depth (0.1mm) corresponding to the copper conductor section, to accommodate the characteristics of easy sliding of aluminum conductors and easy clamping of copper conductors. The copper-aluminum transition alloy layer is a copper-clad aluminum composite layer with a resistivity ≤0.05Ω·mm. 2 / m, tensile strength ≥120MPa, conforming to GB / T13140 standard.

[0028] Through the design of the connecting plate 201, the top pressure plate 202, the wire pressing plate 203, and the bending arc groove 204, when the L-shaped pressure ring 104 rotates with the nut 103 and contacts the top pressure plate 202, the top pressure plate 202 will be subjected to a pushing force towards the inside of the terminal 1. Since the connecting plate 201 is fixed inside the extrusion port 102, and the lower surface of the connection between the connecting plate 201 and the top pressure plate 202 is provided with the bending arc groove 204, this structure allows the top pressure plate 202 to bend towards the inside of the terminal 1 with the bending arc groove 204 as the fulcrum, thereby driving the wire pressing plate 203 at one end of the lower surface of the top pressure plate 202 to move towards the inner ring of the terminal 1 through the extrusion port 102. As the L-shaped pressure ring 104 continuously presses against the top pressure plate 202, the pressure plates 203 of the four sets of crimping mechanisms 2 will synchronously move towards the center of the terminal 1 and gradually contact the outer surface of the inserted wire, eventually fitting tightly to achieve the clamping and fixing of the wire. When the bent part of the L-shaped pressure ring 104 hooks onto the outer surface of the top pressure plate 202 as the nut 103 rotates, the rotation of the nut 103 can be limited and fixed, so that the pressure plate 203 maintains a stable clamping force on the wire. At the same time, the design of the bending arc groove 204 ensures that the trajectory of the top pressure plate 202 is stable when it bends, avoiding the connection plate 201 from breaking or deforming due to uneven force.

[0029] Based on the above technical solution, the working steps of this solution are summarized as follows: In actual wiring operations, first insert the wire to be connected into the wire receiving channel of the terminal 1, ensuring that the insertion depth of the wire end meets the conductive contact requirements. Then, the operator only needs to use a regular wrench to rotate the nut 103 on the threaded groove 101 on the outer surface of the terminal 1, so that the nut 103 moves along the threaded groove 101 towards the top pressure plate 202. The L-shaped pressure ring 104, which is fixedly connected to one end of the nut 103, will move synchronously with the nut 103. During the movement, the inner sidewall of the L-shaped pressure ring 104 will gradually apply top pressure to the four sets of top pressure plates 202 fixed in the compression port 102 of the terminal 1. Due to the connection between the connecting plate 201 and the top pressure plate 202, the pressure is applied at the bottom. The surface is provided with a bending arc groove 204. This structure allows the top pressure plate 202 to bend into the terminal 1 with the bending arc groove 204 as the fulcrum. This causes the wire pressing plate 203 at one end of the lower surface of the top pressure plate 202 to move towards the inner ring of the terminal 1 through the extrusion port 102. As the L-shaped pressing ring 104 continues to press the top pressure plate 202, the wire pressing plates 203 of the four sets of crimping mechanisms 2 will move towards the center of the terminal 1 and gradually contact the outer surface of the inserted wire, eventually fitting tightly to achieve the pressing and fixing of the wire. When the bent part of the L-shaped pressing ring 104 hooks onto the outer surface of the top pressure plate 202 as the nut 103 rotates, the rotation of the nut 103 can be limited and fixed, so that the wire pressing plate 203 maintains a stable pressing force on the wire.

[0030] In summary: the wiring process eliminates the need for large power tools, saving time spent on transporting, assembling, and debugging them. Operators only need to carry a regular wrench to complete the wiring operation, reducing the time spent on tool preparation. At the same time, the wiring process for a single terminal is simplified, avoiding extra steps such as starting and switching power tools, significantly shortening the wiring time for a single group and improving the overall construction progress.

[0031] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-connect copper-aluminum terminal, characterized in that, include: The terminal (1) is a copper-aluminum composite structure, including an integrally formed aluminum conductor segment, a copper conductor segment and a copper-aluminum transition alloy layer between the two segments. The inner wall of the inner ring of the aluminum conductor segment is provided with an anti-oxidation coating. The outer surface of the terminal (1) is provided with an embedded threaded groove (101). A nut (103) is threaded on the outer surface of the threaded groove (101). The threaded groove (101) of the terminal (1) is provided with a crimping port (102) on all four sides. A crimping mechanism (2) is fixedly connected in the crimping port (102). The crimping plate (203) of the crimping mechanism (2) is made of brass substrate and is plated with a tin-nickel alloy layer.

2. The quick-connect copper-aluminum terminal according to claim 1, characterized in that: An L-shaped pressure ring (104) is fixedly installed at one end of the nut (103). The L-shaped pressure ring (104) can be rotated on the outer surface of the thread groove (101) by the nut (103) to synchronously push the four sets of crimping mechanisms (2) towards the terminal block (1) through the extrusion port (102). The L-shaped pressure ring (104) is made of copper alloy to avoid electrochemical corrosion when it comes into contact with the copper conductor section of the terminal block (1).

3. The quick-connect copper-aluminum terminal according to claim 2, characterized in that: After the L-shaped pressure ring (104) presses the crimping mechanism (2) into the terminal post (1) and rotates with the nut (103) to the end of the thread groove (101), the bent part at the end of the L-shaped pressure ring (104) will hook onto the outer surface of one end of the crimping mechanism (2) to lock the position of the nut (103).

4. A quick-connect copper-aluminum terminal according to claim 1, characterized in that: The pressing mechanism (2) includes a connecting plate (201), which is fixedly installed inside the pressing port (102). A top pressure plate (202) is fixedly installed at one end of the connecting plate (201). The top pressure plate (202) can be pressed by an L-shaped pressure ring (104) driven by a rotating nut (103), and can also be hooked on the outer surface by the L-shaped pressure ring (104).

5. A quick-connect copper-aluminum terminal according to claim 4, characterized in that: A pressure plate (203) is fixedly installed on one end of the lower surface of the top pressure plate (202), and the pressure plate (203) is located in the inner ring of the terminal (1) through the extrusion port (102).

6. A quick-connect copper-aluminum terminal according to claim 5, characterized in that: The pressure plate (203) has an anti-slip texture on the side facing the conductor, and the texture depth of the pressure plate corresponding to the aluminum conductor segment is 0.2mm, which is greater than the texture depth of the copper conductor segment, which is 0.1mm, in order to adapt to the characteristics of aluminum conductors being easy to slide and copper conductors being easy to press.

7. A quick-connect copper-aluminum terminal according to claim 6, characterized in that: A bending arc groove (204) is provided on the lower surface of the connection between the connecting plate (201) and the top pressure plate (202).

8. A quick-connect copper-aluminum terminal according to any one of claims 1-7, characterized in that: The copper-aluminum transition alloy layer is a copper-clad aluminum composite layer with a resistivity ≤0.05Ω·mm. 2 / m, tensile strength ≥120MPa.

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