A copper-aluminum wiring terminal
By using a damping rotating connecting block and an aluminum corrugated pipe in the copper-aluminum terminal block, the problem of easy breakage at the connection between the aluminum and copper bodies is solved, resulting in a more stable connection, reduced wear, and improved safety and service life of the terminal block.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG YONGJU ELECTRIC POWER FITTINGS CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-06-12
AI Technical Summary
Traditional copper-aluminum terminals are prone to breakage at the connection between the aluminum and copper bodies when the wires are shaken, leading to safety hazards and unstable fixation.
The design employs a damping rotating connecting block and an aluminum bellows. The damping rotating connecting block reduces friction and wear during slight torsion, while the bellows disperses bending force and stress during swaying.
This effectively avoids breakage and unstable fixation at the connection between the aluminum and copper bodies, improving the durability and safety of the terminal blocks.
Smart Images
Figure CN224355455U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of terminal block technology, and in particular to a copper-aluminum terminal block. Background Technology
[0002] Terminal blocks are accessories used to achieve electrical connections. Currently, with increasing industrial automation and more stringent and precise industrial control requirements, the use of terminal blocks is gradually rising. With the development of the electronics industry, the application scope and types of terminal blocks are also expanding.
[0003] Traditional copper-aluminum terminals consist of a copper body and an aluminum body connected to it. The copper and aluminum bodies are connected by welding. In actual use, the wires may sway when blown by strong winds or subjected to other external forces. This swaying of the wires forces the aluminum body to also sway. Since the aluminum body is rigid, the swaying force will cause bending and stress at the connection between the aluminum and copper bodies and at the 02-corner. This can lead to breakage at the 02-corner of the copper body after prolonged use, resulting in safety hazards or inconvenience in electricity use. At the same time, the swaying force of the aluminum body, when applied to the 2-copper body, can loosen the bolts between the copper body and the electrical equipment, thus affecting the fixation between the copper body and the electrical equipment. Utility Model Content
[0004] To overcome the drawback that the force of shaking will cause bending force and stress at the connection between the aluminum body and the copper body, as well as at the 02-inner corner, which will easily lead to breakage at the 02-inner corner of the copper body after long-term use, this utility model provides a copper-aluminum terminal block.
[0005] The technical solution is: a copper-aluminum terminal block, comprising an aluminum body and a copper body; a cavity is provided at the end of the aluminum body; a copper body is provided on the right side of the aluminum body; it also includes a sealing ring and a bellows; a sealing ring is installed at the left end of the aluminum body; a bellows is provided on the aluminum body, and the bellows is made of aluminum.
[0006] Furthermore, it also includes elastic sheets; several elastic sheets are fixedly connected to the inner ring surface of the aluminum body.
[0007] Furthermore, it also includes a connecting block, a screw, and a threaded sleeve; the connecting block is provided inside the cavity; the screw is installed on the connecting block; and the threaded sleeve is fixedly connected to the copper body, and the threaded sleeve is fixedly connected to the screw.
[0008] Furthermore, the connecting block is damped and rotated within the cavity.
[0009] The beneficial effects are: when the wire is slightly twisted or slightly twisted due to external force, the slightly twisted wire will not cause the aluminum body to rotate on the connecting block because the connecting block and the aluminum body are connected by damping rotation. This avoids excessive friction between the aluminum body and the copper body if the wire is subjected to a slight twisting force and causes the aluminum body to rotate, which would lead to a lot of wear and heat between the two.
[0010] When the conductor undergoes significant torsion or external force causes it to twist considerably, the torsional force on the conductor is greater than the damping force between the aluminum body and the connecting block. Therefore, the conductor will cause the aluminum body to rotate on the connecting block. This prevents the conductor from being subjected to large torsional forces. If the aluminum body and copper body are rigidly connected by welding, the conductor's central axis will shift after the conductor twists. Therefore, during long-term torsion, the exposed part of the conductor and the part fixed to the aluminum body will be subjected to external force for a long time, which will cause metal fatigue and breakage, resulting in poor contact.
[0011] The corrugated pipe disperses the bending force and stress generated by the aluminum body during shaking. This prevents the aluminum body from being subjected to bending force and stress at the connection between the aluminum body and the copper body, as well as at the inside corners, if the aluminum body is rigid. This could lead to the inside corners of the copper body being prone to breakage after long-term use, causing safety hazards or inconvenience in electrical use. At the same time, the force of the aluminum body shaking acting on the copper body can also loosen the bolts between the copper body and the electrical equipment, thus affecting the fixation between the copper body and the electrical equipment. Attached Figure Description
[0012] Figure 1 This is a three-dimensional structural schematic diagram of the copper-aluminum terminal block of this utility model.
[0013] Figure 2 This is a first partial cross-sectional view of the copper-aluminum terminal block of this utility model;
[0014] Figure 3 This is a second partial sectional view of the copper-aluminum terminal block of this utility model;
[0015] Figure 4 This is a diagram showing the state of the aluminum and copper bodies of the copper-aluminum terminal block of this utility model after they are fixed to the electrical equipment.
[0016] The names and serial numbers of the components in the figure are as follows: 1-Aluminum body, 1a-Cavity, 2-Copper body, 3-Sealing ring, 4-Bellwall, 5-Elastic sheet, 6-Connecting block, 7-Screw, 8-Threaded sleeve, 02-Corner. Detailed Implementation
[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings.
[0018] Example 1
[0019] A copper-aluminum terminal block, such as Figure 1-4 As shown, it includes an aluminum body 1 and a copper body 2; the aluminum body 1 has a cavity 1a at one end; the copper body 2 is located on the right side of the aluminum body 1;
[0020] It also includes a sealing ring 3 and a bellows 4; the sealing ring 3 is installed on the left end of the aluminum body 1; the bellows 4 is provided on the aluminum body 1, and the bellows 4 is made of aluminum.
[0021] It also includes elastic sheet 5; three elastic sheets 5 are fixedly connected to the inner ring surface of the aluminum body 1 in a ring-shaped and equidistant distribution.
[0022] It also includes a connecting block 6, a screw 7 and a threaded sleeve 8; the connecting block 6 is provided in the cavity 1a; the screw 7 is installed on the connecting block 6; the threaded sleeve 8 is fixedly connected to the copper body 2, and the threaded sleeve 8 is bolted to the screw 7.
[0023] The connecting block 6 is damped and rotated within the cavity 1a.
[0024] When using this copper-aluminum terminal block, firstly, the operator strips the wire to the appropriate length and inserts it until the exposed wire is completely inside the aluminum body 1. The end of the wire is then fixed by the aluminum body 1. At this time, the sealing ring 3 seals the gap between the aluminum body 1 and the wire, thereby preventing dust and moisture from entering the aluminum body 1 during subsequent work, which would cause the aluminum body 1 and the wire connection part to become damp, leading to rust and corrosion of the connection part, thus affecting the electrical performance of the connection.
[0025] It should be noted that the aluminum body 1 and the copper body 2 are fixed together by the screw 7 and the threaded sleeve 8. This fixing method enhances the firmness between the aluminum body 1 and the copper body 2. At the same time, it can also realize the quick splicing between the aluminum body 1 and the copper body 2, which is convenient for subsequent individual replacement and maintenance of the aluminum body 1 and the copper body 2. This avoids oxidation or other faults of the aluminum body 1 and the copper body 2 after long-term use. In contrast, the aluminum body 1 and the copper body 2 are usually welded together, which requires disassembly and replacement of the whole body for maintenance and replacement, which is very inconvenient and greatly reduces the practicality of copper-aluminum terminals.
[0026] Next, the workers connected the copper body 2 to the electrical equipment using fasteners such as screws and bolts, for example... Figure 4As shown, when the wire is slightly twisted or slightly twisted due to external force during operation, the slightly twisted wire will not cause the aluminum body 1 to rotate on the connecting block 6 because the connecting block 6 and the aluminum body 1 are connected by damping rotation. This avoids excessive friction between the aluminum body 1 and the copper body 2 if the wire is subjected to a slight twisting force and causes the aluminum body 1 to rotate, which would lead to a lot of wear and heat between the two.
[0027] When the conductor undergoes a large twist or is subjected to external force, the torque on the conductor is greater than the damping force between the aluminum body 1 and the connecting block 6. Therefore, the conductor will drive the aluminum body 1 to rotate on the connecting block 6. This avoids the situation where, if the aluminum body 1 and the copper body 2 are rigidly connected by welding, the central axis of the conductor will shift after the conductor twists. Therefore, during the long-term torsion process, the exposed part of the conductor and the part fixed to the aluminum body 1 will be subjected to external force for a long time, which will cause metal fatigue and breakage, resulting in poor contact.
[0028] Meanwhile, the corrugated pipe 4 is made of aluminum. In actual use, when the wires are blown by strong winds or subjected to other external forces, the aluminum body 1 and the copper body 2 will shake. The shaking wires will force the aluminum body 1 to also shake. Since the corrugated pipe 4 has the ability to bend and deform, the shaking aluminum body 1 will force the corrugated pipe 4 to bend accordingly. Thus, the corrugated pipe 4 disperses the bending force and stress generated by the shaking aluminum body 1. This avoids the situation where, if the aluminum body 1 is rigid, the shaking force will cause the connection between the aluminum body 1 and the copper body 2 and the inside corner 02 to be subjected to bending force and stress. This will make the inside corner 02 of the copper body 2 prone to breakage after long-term use, thus causing safety hazards or inconvenience in using electricity. At the same time, after the shaking force of the aluminum body 1 is applied to the copper body 2, the bolts between the copper body 2 and the electrical equipment will also loosen, thus affecting the fixation between the copper body 2 and the electrical equipment.
[0029] At the same time, when the bellows 4 bends, the elastic sheet 5 will also bend accordingly, so that the elastic sheet 5 can play a role in sharing the load of the bellows 4, thus avoiding the problem that the bellows 4 will bend too much and break when the aluminum body 1 generates too much shaking force.
[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A copper-aluminum terminal block, characterized in that, It includes an aluminum body (1) and a copper body (2); the aluminum body (1) has a cavity (1a) at its end; the copper body (2) is provided on the right side of the aluminum body (1); it also includes a sealing ring (3) and a bellows (4); the sealing ring (3) is installed on the left end of the aluminum body (1); the bellows (4) is provided on the aluminum body (1), and the bellows (4) is made of aluminum.
2. The copper-aluminum terminal block according to claim 1, characterized in that, It also includes elastic sheets (5); several elastic sheets (5) are fixedly connected to the inner ring surface of the aluminum body (1).
3. A copper-aluminum terminal block according to claim 1, characterized in that, It also includes a connecting block (6), a screw (7) and a threaded sleeve (8); the connecting block (6) is provided in the cavity (1a); the screw (7) is installed on the connecting block (6); the threaded sleeve (8) is fixedly connected to the copper body (2), and the threaded sleeve (8) is fixedly connected to the screw (7).
4. A copper-aluminum terminal block according to claim 3, characterized in that, The connecting block (6) is damped and rotated within the cavity (1a).