A screw tightening type terminal structure

Abstract

The utility model relates to the technical field of wiring terminal, specifically relates to a screw tightening type wiring terminal structure, including base, the base is by rectangle and semicircle, the fixed hole is established in the center of base semicircle, the rectangle of base is equipped with the adjusting hole, the top fixed mounting of base has two limit blocks, and the adjusting hole is located the central position of two limit blocks, the sliding installation of two limit blocks has the pressure block, and the pressure block can make the pressure block move to base through the screw of rotary screw rod, and the rotary nut can make the pressure block gradually move down, and then the threading hole is close to threading groove, and the electric wire in the clamping through -hole, and this mode effectively avoids the problem that the pressure block easily causes the harness damage.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, specifically to a screw-tightening terminal block structure. Background Technology

[0002] In low-voltage power distribution systems, terminal blocks are used as key connection components in the electrical connection links of power distribution equipment such as electricity meters, terminal switches, household appliances, ships, and automobiles.

[0003] In standard operations, the first step is to loosen the fastening screws to create a gap between the connector and the screw. The wire harness is then inserted into the gap and the screws are tightened again to secure it. However, when dealing with single-strand, thick-diameter copper wire harnesses, the high ductility of copper makes two types of structural damage prone to occur during tightening: first, mechanical stress concentration reduces the wire's bending resistance; second, the wire cross-section at the screw crimp undergoes plastic deformation, changing from a standard circular shape to a rectangular structure, resulting in a sharp reduction in the effective conductive cross-sectional area. For multi-strand stranded copper conductors, tightening operations can easily cause the wire harness to unravel, or force operators to use unconventional bending methods for fixation. Such non-standard operations reduce construction efficiency and introduce uncontrollable risks. More seriously, these defects will cause a surge in contact resistance under long-term energized conditions, leading to abnormal temperature rises, increased wire loss, and a significant safety hazard of electrical fires.

[0004] In view of the above, in order to overcome the above technical problems, this utility model designs a screw-tightening terminal block structure, which solves the above technical problems. Utility Model Content

[0005] The technical objective of this invention is to provide a screw-tightening terminal block structure that allows the pressure block to move towards the base by rotating the screw on the screw rod; while rotating the nut allows the pressure block to gradually move downward, thereby bringing the wire hole closer to the wire groove and clamping the wire in the through hole. This method effectively avoids the problem of the pressure block easily causing damage to the wire harness.

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

[0007] This utility model provides a screw-tightening terminal block structure, including a base, which is composed of a rectangle and a semicircle. A fixing hole is provided at the center of the semicircle of the base, and an adjustment hole is provided at the rectangle of the base, with the adjustment hole located at the center of two limiting blocks. Two limiting blocks are fixedly installed on the top of the base, and a pressure block is slidably installed between the two limiting blocks.

[0008] Preferably, a threading groove is provided above the limiting block. The threading groove is composed of a rectangle and an arc, and the arc is located in the lower middle position of the rectangle.

[0009] Preferably, the cross-sectional shape of the pressure block is composed of a semicircle and a rectangle. A threading hole is provided at the center of the semicircle of the pressure block, and arc blocks are connected to both ends of the upper semicircle of the pressure block. The outer diameter of the arc blocks is equal to the length of the rectangle in the threading groove, and the thickness of the arc blocks is the same as the thickness of the limiting block.

[0010] Preferably, a screw is fixedly installed below the pressure block, the pressure block is located between the limiting blocks, and the screw is adjusted by passing through the adjustment hole on the base.

[0011] Preferably, a washer and a screw are mounted on the screw.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. By rotating the screw on the screw rod, the pressure block can be moved towards the base; while rotating the nut can make the pressure block gradually move down, thereby bringing the wire hole closer to the wire groove and clamping the wire in the through hole. This method effectively avoids the problem of the pressure block easily causing damage to the wire harness.

[0014] 2. Since the wires are connected to the through holes formed by the wire grooves and holes, the contact surface is increased, and this interlocking connection method is not easy to loosen, effectively avoiding the problem of loose wire connections. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] The above and other aspects of the present invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0018] Figure 2 This is a front view of the utility model;

[0019] Figure 3 This is a schematic diagram of the base of this utility model;

[0020] Figure 4 This is a schematic diagram of the pressing block of this utility model.

[0021] In the diagram: 1. Base; 11. Fixing hole; 12. Adjustment hole; 2. Limiting block; 21. Wire channel; 3. Pressure block; 31. Wire hole; 32. Arc block; 33. Screw; 34. Washer; 35. Screw. Detailed Implementation

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1 , 2 As shown in Figures 3 and 4, the present invention provides a screw-tightening terminal block structure, including a base 1. The base 1 is composed of a rectangle and a semicircle. A fixing hole 11 is provided at the center of the semicircle of the base 1, and an adjustment hole 12 is provided at the rectangle of the base 1. Two limiting blocks 2 are fixedly installed on the top of the base 1, and the adjustment hole 12 is located at the center of the two limiting blocks 2. A pressure block 3 is slidably installed between the two limiting blocks 2.

[0024] The wire is clamped by the engagement of the clamping block 3 and the wire guide 21, ensuring a secure fixation and preventing loosening or detachment. The adjusting hole 12 is located at the center of the two limiting blocks 2, ensuring even force distribution and improving clamping stability. The wire can be loosened by rotating the screw in the opposite direction, facilitating inspection or replacement of the wiring.

[0025] like Figure 1 , 2 As shown in Figures 3 and 4, a threading groove 21 is provided above the limiting block 2. The threading groove 21 is composed of a rectangle and an arc, and the arc on the threading groove 21 is located in the lower middle position of the rectangle.

[0026] The curved portion of the wire guide 21 is located in the lower center of the rectangle, allowing it to better conform to the circular cross-section of the wire, ensuring the wire is centered and preventing offset or skew. This accommodates wires of different diameters and enhances their tensile strength, preventing loosening or slippage. The larger contact surface between the curved portion and the wire, combined with the squeezing action of the pressure block 3, ensures more even force distribution and a more secure clamping.

[0027] like Figure 1 , 2 As shown in Figure 3, the cross-sectional shape of the pressure block 3 is composed of a semicircle and a rectangle. A threading hole 31 is provided at the center of the semicircle of the pressure block 3, and arc blocks 32 are connected to both ends of the upper semicircle of the pressure block 3. The outer diameter of the arc block 32 is equal to the length of the rectangle in the threading groove 21, and the thickness of the arc block 32 is the same as the thickness of the limiting block 2.

[0028] The wire-passing hole 31 at the center of the semicircle of the pressure block 3 is coaxially aligned with the arc-shaped segment of the wire-passing groove 21, forcing the wire to remain centered and preventing stress concentration on one side due to misalignment. This ensures that the arc block 32 fits tightly against the sidewall of the wire-passing groove 21 when the pressure block 3 slides, preventing the pressure block 3 from tilting or jamming during the clamping process. The double wrapping of the arc block 32 and the arc-shaped segment of the wire-passing groove 21 significantly increases the friction between the wire and the terminal, allowing it to withstand higher axial tensile forces. The arc block 32 and the limiting block 2 are of equal thickness, forming a continuous force-bearing surface, dispersing shear stress, and preventing localized deformation.

[0029] like Figure 1 , 2 As shown in Figure 4, a screw 33 is fixedly installed below the pressure block 3. The pressure block 3 is located between the limiting blocks 2 and is adjusted by the screw 33 passing through the adjustment hole 12 on the base 1.

[0030] like Figure 1 , 2 As shown in Figure 4, the screw 33 is directly fixed below the pressure block 3. When the screw 35 is rotated, the pressure block 3 is driven to slide vertically along the limit block 2, achieving millimeter-level displacement accuracy. The clamping force can be precisely adjusted to avoid overpressure damage to the cable or insufficient clamping.

[0031] like Figure 1 and 2 As shown, a washer 34 and a screw 35 are mounted on the screw 33.

[0032] During the operation of this invention, the wire needs to be passed through the through hole formed by the wire groove 21 and the wire hole 31 during installation. At this time, by rotating the screw 35 on the screw 33, the pressure block 2 can be moved towards the base 1; while rotating the nut can make the pressure block 3 gradually move down, thereby bringing the wire hole 31 closer to the wire groove 21 and clamping the wire in the through hole. When the nut is rotated in the opposite direction, the pressure block 3 will automatically lift up, causing the pressure block 3 to gradually move upward, thereby causing the wire groove 21 to leave the wire hole 31 and releasing the wire.

[0033] Although one or more exemplary embodiments of this disclosure have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the appended claims.

Claims

1. A screw-tightening terminal block structure, comprising a base (1), characterized in that: The base (1) is composed of a rectangle and a semicircle. A fixing hole (11) is provided at the center of the semicircle of the base (1). An adjustment hole (12) is provided at the rectangle of the base (1). Two limiting blocks (2) are fixedly installed on the top of the base (1). The adjustment hole (12) is located at the center of the two limiting blocks (2). A pressure block (3) is slidably installed between the two limiting blocks (2).

2. The screw-tightening terminal block structure according to claim 1, characterized in that: The limiting block (2) has a threading groove (21) on its upper part. The threading groove (21) is composed of a rectangle and an arc, and the arc on the threading groove (21) is located in the lower middle position of the rectangle.

3. The screw-tightening terminal block structure according to claim 2, characterized in that: The cross-sectional shape of the pressure block (3) is composed of a semicircle and a rectangle. A thread hole (31) is provided at the center of the semicircle of the pressure block (3), and arc blocks (32) are connected to both ends of the upper semicircle of the pressure block (3). The outer diameter of the arc block (32) is equal to the length of the rectangle in the thread groove (21), and the thickness of the arc block (32) is the same as the thickness of the limiting block (2).

4. The screw-tightening terminal block structure according to claim 3, characterized in that: A screw (33) is fixedly installed below the pressure block (3). The pressure block (3) is located between the limiting blocks (2) and is adjusted by passing the screw (33) through the adjustment hole (12) on the base (1).

5. The screw-tightening terminal block structure according to claim 4, characterized in that: A washer (34) and a screw (35) are mounted on the screw (33).

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