Copper-aluminum double-end wiring terminal

Abstract

The utility model relates to a copper-aluminum double-end wiring terminal. The technical problem to be solved by the utility model is to provide the copper-aluminum double-end wiring terminal which can prevent screws from loosening and is high in safety. According to the technical scheme, the double-end terminal comprises a double-end terminal body, a locking screw, an anti-loosening pressure pad and a protection plate, the double-end terminal body comprises a copper head part and an aluminum head part, and the copper head part and the aluminum head part each comprise a terminal butt welding part, a semi-arc transition part and a square external connection part; the protection plate comprises a main plate part and a side plate part, a main plate clamping block is arranged at the front end of the main plate part, a side plate limiting protrusion is arranged on the inner side of the bottom of the side plate part, protection plate guide blocks are further arranged on the two sides of the main plate part, and a transition part bayonet is formed in the semi-arc transition part. The utility model has the advantages that the anti-loosening pressure pad and the protection plate are ingeniously matched to press the tightened locking screw, so that the locking screw is effectively prevented from loosening and falling off after being used for a long time, and the wiring terminal is contacted more tightly.

Description

Technical Field

[0001] The utility model relates to a copper-aluminum double-headed terminal. Background Art

[0002] Terminal blocks are widely used in distribution networks. For example, for the incoming and outgoing line connections of electrical equipment such as transformers, circuit breakers, and disconnectors, copper-aluminum double-headed terminal blocks are usually used. Because if they are made of a single copper material, the cost is high and valuable copper resources are wasted. Generally, a copper-aluminum double-headed terminal block includes a copper head and an aluminum head. Both the copper head and the aluminum head are butt-connected to a cable or other copper nose through screws. An insulating sleeve is usually sleeved outside to ensure insulation and protection when arranged side by side. After long-term use of the existing copper-aluminum double-headed terminal block, the screws are likely to loosen and fall off, resulting in poor contact between the copper-aluminum terminal block and other conductive components, posing a safety hazard. Moreover, the insulating sleeve is installed with screws, and the installation is cumbersome and inconvenient. Therefore, improvement and optimization are needed. Summary of the Utility Model

[0003] To solve the above problems, the technical problem to be solved by the utility model is to provide a copper-aluminum double-headed terminal block that prevents screw loosening and has high safety.

[0004] The technical solution adopted by the copper-aluminum double-headed terminal block of the utility model is as follows: It is characterized by including a double-headed terminal body, a locking screw, an anti-loosening pressure pad, and a protection plate. The double-headed terminal body includes a copper head and an aluminum head. Both the copper head and the aluminum head include a terminal butt-welding part, a semi-circular arc transition part, and a square external connection part. An external thread hole connected to the locking screw is provided on the square external connection part;

[0005] The protection plate includes a main board part and a side board part. A main board clamping block is provided at the front end of the main board part. A side board limiting protrusion is provided on the inner side of the bottom of the side board part. Protection plate guiding blocks are also provided on both sides of the main board part. A transition part bayonet is provided on the semi-circular arc transition part. A transition part clamping block for docking with the main board clamping block is provided in the transition part bayonet. An external connection part limiting groove for limiting the side board limiting protrusion and an external connection part guiding port for guiding the protection plate guiding block are provided at the side end of the square external connection part. The upper end of the anti-loosening pressure pad abuts against the inner side of the main board part and its lower end abuts against the upper part of the locking screw.

[0006] The external connection part limiting grooves are provided at intervals at the side end of the square external connection part, and the side board limiting protrusion is in a semi-circular arc structure.

[0007] Symmetrically arranged L-shaped positioning platforms are provided on the inner side of the main board part. A pressure pad passing port is formed between the two L-shaped positioning platforms. The anti-loosening pressure pad includes a pressure pad positioning part placed on the L-shaped positioning platform and a pressure pad extrusion part for extruding the locking screw.

[0008] The cross-section of the gasket positioning part is square, and the cross-section of the gasket extrusion part is circular.

[0009] The locking screw is provided with a screw head, and the screw head is provided with a screw head positioning groove corresponding to the gasket extrusion part. The screw head is of a regular hexagon structure.

[0010] The protective plate guide block is of a dovetail structure.

[0011] A manual adjustment opening is provided on the side plate part.

[0012] The advantages of the copper-aluminum double-headed terminal of the present utility model are as follows: The anti-loosening gasket and the protective plate are cleverly matched to press the tightened locking screw, effectively preventing the loosening and falling off problems of the locking screw after long-term use, and making the contact of the terminal closer; The protective plate replaces the insulating sleeve to realize the insulation protection function of the terminal and adopts a snap-fit adjustable structure, which is convenient for installation and operation and more flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0014] Figure 1 is a schematic structural view of the copper-aluminum double-headed terminal of the present utility model;

[0015] Figure 2 is a schematic structural view of the double-headed terminal body of the present utility model;

[0016] Figure 3 is a schematic structural view of the protective plate of the present utility model;

[0017] Figure 4 is a schematic structural view of the anti-loosening gasket of the present utility model;

[0018] Figure 5 is a schematic structural view of the locking screw of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] As Figures 1-5As shown in the figure, the copper-aluminum double-headed terminal involved in the utility model includes a double-headed terminal body 1, a locking screw 2, an anti-loosening pressure pad 3 and a protective plate 4. The double-headed terminal body 1 includes a copper head 6 and an aluminum head 7. Both the copper head 6 and the aluminum head 7 include a terminal butt-welding part 10, a semi-circular arc transition part 9 and a square external connection part 8. An external thread hole 12 connected to the locking screw 2 is provided on the square external connection part 8. The protective plate 4 includes a main board part 15 and a side board part 16. A main board clamping block 17 is provided at the front end of the main board part 15. A side board limiting protrusion 18 is provided on the inner side of the bottom of the side board part 16. Protective plate guiding blocks 19 are also provided on both sides of the main board part 15. A transition part clamping opening 21 is provided on the semi-circular arc transition part 9. A transition part clamping block 22 for docking with the main board clamping block 17 is provided in the transition part clamping opening 21. An external part limiting groove 23 for limiting the side board limiting protrusion 18 and an external part guiding opening 24 for guiding the protective plate guiding block 19 are provided at the side end of the square external connection part 8. The upper end of the anti-loosening pressure pad 3 abuts against the inner side of the main board part 15 and its lower end abuts against the upper part of the locking screw 2. The anti-loosening pressure pad 3 and the protective plate 4 cooperate skillfully to realize the pressing effect on the tightened locking screw 2, effectively preventing the loosening and falling off problems of the locking screw 2 after long-term use, making the connection of the terminal more tight. The protective plate 4 replaces the insulating sleeve to realize the insulating protection function of the terminal and adopts a clamping structure, which is more convenient for installation.

[0020] The external part limiting groove 23 is provided at intervals on the side end of the square external connection part 8. The side board limiting protrusion 18 is of a semi-circular arc structure. The protective plate 4 can be adjusted up and down according to the position after the locking screw 2 is tightened, which is more flexible and convenient in use.

[0021] Symmetrically arranged L-shaped positioning platforms 26 are provided on the inner side of the main board part 15. A pressure pad passing opening 27 is formed between the two L-shaped positioning platforms 26. The anti-loosening pressure pad 3 includes a pressure pad positioning part 29 placed on the L-shaped positioning platform 26 and a pressure pad pressing part 30 for squeezing the locking screw 2, which effectively positions the anti-loosening pressure pad 3 and prevents the loosening pressure pad 3 from shifting in position due to factors such as large extrusion force or vibration.

[0022] The cross-section of the pressure pad positioning part 29 is square, which effectively prevents rotation. The cross-section of the pressure pad pressing part 30 is circular.

[0023] The locking screw 2 is provided with a screw head 32. A screw head positioning groove 33 corresponding to the pressure pad pressing part 30 is provided on the screw head 32. The screw head 32 is of a regular hexagon structure, with accurate positioning.

[0024] The protective plate guiding block 19 is of a dovetail structure, making the movement of the protective plate 4 more stable and reliable during adjustment.

[0025] The side plate part 16 is provided with a manual adjustment opening 34, which is more convenient for personnel to operate.

[0026] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A copper-aluminum double-headed terminal block, characterized in that: It includes a double-headed terminal body (1), a locking screw (2), an anti-loosening pressure pad (3), and a protection plate (4). The double-headed terminal body (1) includes a copper head (6) and an aluminum head (7). Both the copper head (6) and the aluminum head (7) include a terminal butt-welding part (10), a semi-circular arc transition part (9), and a square external connection part (8). An external connection threaded hole (12) connected to the locking screw (2) is provided on the square external connection part (8). The protection plate (4) includes a main board part (15) and a side board part (16). A main board clamping block (17) is provided at the front end of the main board part (15). A side board limiting protrusion (18) is provided on the inner side of the bottom of the side board part (16). Protection plate guiding blocks (19) are further provided on both sides of the main board part (15). A transition part bayonet (21) is provided on the semi-circular arc transition part (9). A transition part clamping block (22) docked with the main board clamping block (17) is provided in the transition part bayonet (21). An external connection part limiting groove (23) for limiting the side board limiting protrusion (18) and an external connection part guiding port (24) for guiding the protection plate guiding block (19) are provided at the side end of the square external connection part (8). The upper end of the anti-loosening pressure pad (3) abuts against the inner side of the main board part (15), and its lower end abuts against the upper part of the locking screw (2).

2. The copper-aluminum double-headed wiring terminal according to claim 1, wherein: The external connection part limiting grooves (23) are provided at intervals on the side end of the square external connection part (8), and the side board limiting protrusion (18) is of a semi-circular arc structure.

3. The copper-aluminum double-headed terminal according to claim 1, characterized in that: Symmetrically arranged L-shaped positioning platforms (26) are provided on the inner side of the main board part (15). A pressure pad passing port (27) is formed between the two L-shaped positioning platforms (26). The anti-loosening pressure pad (3) includes a pressure pad positioning part (29) placed on the L-shaped positioning platform (26) and a pressure pad extrusion part (30) for extruding the locking screw (2).

4. The copper-aluminum double-headed terminal according to claim 3, characterized in that: The cross-section of the pressure pad positioning part (29) is square, and the cross-section of the pressure pad extrusion part (30) is circular.

5. The copper-aluminum double-headed wiring terminal according to claim 4, characterized in that: The locking screw (2) is provided with a screw head (32). A screw head positioning groove (33) corresponding to the pressure pad extrusion part (30) is provided on the screw head (32), and the screw head (32) is of a regular hexagon structure.

6. The copper-aluminum double-headed wiring terminal according to claim 1, characterized in that: The protection plate guiding block (19) is of a dovetail structure.

7. The copper-aluminum double-headed terminal according to claim 1, characterized in that: A manual adjustment port (34) is provided on the side board part (16).

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