Wiring terminal capable of improving electric conductivity

Abstract

The utility model relates to a wiring terminal, in particular to a wiring terminal capable of improving conductivity, which comprises a crimping seat, a crimping sheet capable of moving up and down is arranged in the crimping seat, a lower contact surface of the crimping seat in contact with a lead and an upper contact surface of the crimping sheet in contact with the lead are arc-shaped, and the arc radius of the lower contact surface is equal to that of the upper contact surface. The lower contact surface and the upper contact surface are arcs with central angles larger than 90 degrees and smaller than 180 degrees; a screw hole is formed in the top of the crimping seat, a screw rod part of the fastening screw penetrates through the screw hole and is in threaded connection with the crimping seat, and the lower end of the screw rod part abuts against the top surface of the crimping sheet. According to the wiring terminal capable of improving the electric conductivity, the problems of air switch and switch faults of a leakage protector are fundamentally solved, the heat loss is reduced, the defect of heating of the air switch can be solved, meanwhile, the maintenance rate of equipment can be reduced, the workload is reduced, the service life of the equipment is prolonged, and safe and stable operation of the equipment is ensured.

Description

Technical Field

[0001] The utility model relates to a wiring terminal, in particular to a wiring terminal with improved conductivity. Background Art

[0002] The circuit breaker of the leakage protector has a high failure rate, which is over 90%. The terminal blocks are prone to heat up, and even burn out. The main reason is that the contact area between the terminal blocks and the power line is too small, and the heat and spark caused by the loose contact may cause fire or burning. In order to reduce the equipment failure rate and property loss, it is necessary to design a superconducting terminal block.

[0003] The utility model patent with application number CN201520587579.6 discloses a terminal block for an AC contactor. Although it can solve the above problems to a certain extent, it has several disadvantages: 1. The curvature of the arc surface is not limited. If the curvature is too small, the contact surface is close to the plane and cannot achieve a sufficient contact area; if the curvature is too large, the upper and lower arc surfaces will form a complete circle after being connected, which will not be clamped tightly and the power cord will easily slip off. 2. The reset spring is set in the arc surface and is easy to contact with the power cord, thereby affecting the normal use of the reset spring and even burning the spring. 3. The upper and lower arc surfaces are smooth arc surfaces, and the power cord is easy to slip off. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a wiring terminal with improved conductivity to solve the above problems.

[0005] The utility model discloses a terminal block for improving conductivity, comprising a crimping seat, wherein a crimping piece movable up and down is arranged in the crimping seat, a lower contact surface of the crimping seat in contact with the wire, and an upper contact surface of the crimping piece in contact with the wire are both arc-shaped, the arc radii of the lower contact surface and the upper contact surface are equal, and the lower contact surface and the upper contact surface are both arcs with a central angle greater than 90° and less than 180°; a screw hole is opened on the top of the crimping seat, a screw portion of a fastening screw passes through the screw hole and is threadedly connected to the crimping seat, and the lower end of the screw portion abuts against the top surface of the crimping piece.

[0006] Normal wiring terminals have two plane surfaces, and the contact area is too small to only contact two wires. The small contact area leads to the above problems. The contact area of ​​the utility model is greatly increased, which solves the faults caused by terminal heating and ensures stable and safe operation of the equipment. The lower contact surface and the upper contact surface are both arcs with a central angle greater than 90° and less than 180°. When the contact area is sufficient, the lower contact surface and the upper contact surface can firmly clamp the power line to prevent slipping.

[0007] Furthermore, a positioning hole is provided on the top surface of the crimping piece, and the lower end of the screw portion is located in the positioning hole to prevent the crimping piece from being displaced forward and backward.

[0008] Both sides of the lower contact surface and the upper contact surface are provided with horizontal surfaces, and spring mounting holes are opened on the horizontal surfaces. A compression spring is provided between the crimping seat and the crimping piece, and the compression spring is located in the spring mounting holes on both sides of the lower contact surface and the upper contact surface to prevent the wire from contacting the compression spring and avoid affecting the normal use of the compression spring. The presence of the compression spring makes the crimping piece always contact with the bottom end of the fastening screw, and the lower end of the screw part is always located in the positioning hole to prevent the crimping piece from falling out of the crimping seat.

[0009] The lower contact surface and the upper contact surface of the utility model are both provided with a plurality of bite convex points, and the convex points can bite into the surface of the wire to further prevent slipping.

[0010] Preferably, the crimping seat and the crimping sheet are made of brass.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The wiring terminal with improved conductivity described in the utility model fundamentally solves the problem of circuit breaker and switch failure of the leakage protector, reduces heat loss and solves the problem of heating of the circuit breaker. At the same time, it can reduce the equipment maintenance rate, lighten the workload, extend the service life of the equipment, and ensure the safe and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a main structural schematic diagram of the utility model;

[0015] Figure 3 It is a structural diagram of the crimping seat;

[0016] Figure 4 It is one of the structural diagrams of the crimping piece;

[0017] Figure 5 This is the second structural diagram of the crimping piece.

[0018] In the figure: 1. Crimping seat; 2. Crimping piece; 3. Lower contact surface; 4. Upper contact surface; 5. Fastening screw; 6. Engaging protrusion; 7. Compression spring; 8. Screw hole; 9. Spring mounting hole; 10. Positioning hole. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with specific embodiments.

[0020] However, the description of the present invention is merely an embodiment of structural and even functional description, and the scope of rights of the present invention is not limited by the embodiments described in the text.

[0021] For example, multiple embodiments may have multiple changes and multiple forms, and it should be understood that the scope of rights of the present utility model includes equivalents that can realize the technical idea.

[0022] like Figures 1 to 5 As shown, this embodiment is realized by the following technical scheme: comprising a crimping seat 1, a crimping piece 2 that can move up and down is provided in the crimping seat 1, a lower contact surface 3 of the crimping seat 1 in contact with the wire, and an upper contact surface 4 of the crimping piece 2 in contact with the wire are both arc-shaped, the arc radii of the lower contact surface 3 and the upper contact surface 4 are equal, and the lower contact surface 3 and the upper contact surface 4 are both arcs with a central angle greater than 90° and less than 180°. A plurality of bite convex points 6 are provided on the lower contact surface 3 and the upper contact surface 4, which can further increase the friction with the wire, prevent the wire from slipping during use, and enhance the anti-slip performance of the terminal block.

[0023] A screw hole 8 is provided at the top of the crimping seat 1. The screw portion of the fastening screw 5 passes through the screw hole 8 and is threadedly connected to the crimping seat 1. The lower end of the screw portion abuts against the positioning hole 10 on the top surface of the crimping piece 2. Horizontal surfaces are provided on both sides of the lower contact surface 3 and the upper contact surface 4. The horizontal surfaces are provided with spring mounting holes 9. A compression spring 7 is provided between the crimping seat 1 and the crimping piece 2. The compression spring 7 is located in the spring mounting holes 9 on both sides of the lower contact surface 3 and the upper contact surface 4. The presence of the compression spring 7 ensures that the crimping piece 2 is always in contact with the bottom end of the fastening screw 5, and the lower end of the screw portion is always located in the positioning hole 10, preventing the crimping piece 2 from falling out of the crimping seat 1.

[0024] The crimping seat 1 and the crimping piece 2 of the present embodiment are made of brass, which has good electrical conductivity and corrosion resistance, and can improve the service life and electrical conductivity efficiency of the terminal.

[0025] The wiring terminal of the utility model has an upper contact surface and a lower contact surface that are designed as arc surfaces, and the central angle of the circle is greater than 90° and less than 180°, so that the lower contact surface and the upper contact surface can firmly clamp the power line to prevent slipping while ensuring that the contact area is sufficient, thereby reducing the possibility of heating of the wiring terminal, thereby reducing the failure rate and ensuring the stable and safe operation of the equipment.

[0026] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. A terminal block with improved conductivity, comprising a crimping seat (1), characterized in that: A crimping plate (2) that can move up and down is arranged in the crimping seat (1); a lower contact surface (3) of the crimping seat (1) that contacts the wire and an upper contact surface (4) of the crimping plate (2) that contacts the wire are both arc-shaped; the arc radii of the lower contact surface (3) and the upper contact surface (4) are equal; the lower contact surface (3) and the upper contact surface (4) are both arcs with a central angle greater than 90° and less than 180°; a screw hole (8) is opened at the top of the crimping seat (1); a screw rod portion of a fastening screw (5) passes through the screw hole (8) and is threadedly connected to the crimping seat (1); and the lower end of the screw rod portion abuts against the top surface of the crimping plate (2).

2. The connection terminal with improved conductivity according to claim 1, characterized in that: A positioning hole (10) is provided on the top surface of the crimping piece (2), and the lower end of the screw portion is located in the positioning hole (10).

3. The connection terminal with improved conductivity according to claim 2, characterized in that: Horizontal surfaces are provided on both sides of the lower contact surface (3) and the upper contact surface (4), and spring mounting holes (9) are provided on the horizontal surfaces. A compression spring (7) is provided between the crimping seat (1) and the crimping sheet (2), and the compression spring (7) is located in the spring mounting holes (9) on both sides of the lower contact surface (3) and the upper contact surface (4).

4. The connection terminal with improved conductivity according to claim 1, characterized in that: A plurality of engaging protrusions (6) are provided on the lower contact surface (3) and the upper contact surface (4).

5. The connection terminal with improved conductivity according to claim 1, characterized in that: The crimping seat (1) and the crimping sheet (2) are made of brass.

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