High-reliability cold crimp terminal

Abstract

This utility model relates to the field of terminal block technology, specifically disclosing a high-reliability cold-pressed terminal block, comprising: an insulating protective layer, on the inner wall of which four sets of axially spaced barbs are arranged in a ring array; a clamping mechanism, including a wire clamp located above the insulating protective layer, with a snap-fit ​​boss fixedly connected to the side of the wire clamp away from each other, and a metal conductor fixedly connected to the end of the wire clamp away from the insulating protective layer by bolts; a specially designed clamping plate that generates an engagement effect through the interlocking clamping surfaces to clamp the wire; and a detachable connection structure between the metal conductor and the wire clamp, which ensures the reliability of current conduction and facilitates later maintenance and replacement. This cold-pressed terminal block can effectively resist displacement caused by vibration, and the conductor can be replaced independently, reducing maintenance costs. Overall, it ensures electrical connection stability while taking into account installation efficiency and long-term reliability.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, specifically a high-reliability cold-pressed terminal block. Background Technology

[0002] As a core component in the field of electrical connections, cold-pressed terminal blocks play an irreplaceable role in automobile manufacturing, motorcycle assembly, new energy industry, photovoltaic equipment, and various mechanical systems.

[0003] In dynamic environments such as vibration, mechanical tension, or temperature changes, cables that rely solely on crimping force for fixation are prone to displacement or loosening. Loosening of the cable leads to a reduction in contact area, resulting in increased contact resistance, overheating, or even short circuits. Furthermore, copper wires are prone to scattering during crimping of multi-core cables (such as flexible cables), which reduces the effective contact area. To address these issues, we propose a highly reliable cold-pressed terminal block. Utility Model Content

[0004] The purpose of this invention is to provide a highly reliable cold-pressed terminal block to solve the problems mentioned in the background art, such as the easy displacement or loosening of cables that rely solely on crimping force for fixation. Loosening of the cable leads to a reduction in contact area, resulting in increased contact resistance, overheating, or even short circuits. Furthermore, when crimping multi-core cables, the copper wires are prone to scattering, leading to a reduction in the effective contact area.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-reliability cold-pressed terminal block, including an insulating protective layer, on the inner wall of the insulating protective layer there are four sets of axially spaced barbs arranged in a ring array; a clamping mechanism, including a wire clamp located above the insulating protective layer, a snap-fit ​​boss fixedly connected to the side of the wire clamp away from each other, and a metal conductor fixedly connected to the end of the wire clamp away from the insulating protective layer by bolts.

[0006] The barbs are evenly distributed on the inner wall of the insulating protective layer, and an annular groove for engaging and locking protrusions is formed between the two sets of barbs along the axial direction of the protective layer.

[0007] The clamp includes a top closed end and left and right arms respectively set at both ends of the top closed end. The cross-section of the top closed end is U-shaped and has elastic deformation properties.

[0008] The left arm has a clamp plate 1 on both the front and back sides of its outer surface, and the right arm has a clamp plate 2 on both the front and back sides of its inner surface. The distance between the clamp plates 1 is greater than the distance between the clamp plates 2.

[0009] The metal conductor and the clamp are detachably connected.

[0010] Among them, clamp one and clamp two are in an meshing relationship.

[0011] This utility model has at least the following beneficial effects: During installation, when the wire is inserted into the insulation layer, the barbs of the annular array can cut into the wire surface at multiple angles to form an anti-slip fixation. The clamping mechanism, through the contraction movement of the U-shaped elastic clamp, makes the snap-fit ​​boss accurately embedded into the pre-set annular groove of the insulation layer, forming a mechanical interlock. The specially designed clamping plate generates an engagement effect through the interlocking clamping surfaces distributed inside and outside, clamping the wire. The detachable connection structure between the metal conductor and the clamp not only ensures the reliability of current conduction but also facilitates later maintenance and replacement. This cold-pressed terminal can effectively resist displacement caused by vibration. The conductor part can be replaced independently, reducing maintenance costs. Overall, while ensuring the stability of electrical connection, it also takes into account installation efficiency and long-term reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a top view schematic diagram of the structure of this utility model;

[0014] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point A in the middle.

[0015] In the diagram: 1. Insulating protective layer; 11. Barb; 2. Clamping mechanism; 21. Wire clamp; 211. Left arm; 212. Right arm; 213. Top closed end; 214. Clamping plate one; 215. Clamping plate two; 22. Snapping boss; 23. Metal conductor; 24. Bolt. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-3 This utility model provides a technical solution: a high-reliability cold-pressed terminal block, including an insulating protective layer 1, on the inner wall of the insulating protective layer 1, there are four sets of axially spaced barbs 11 arranged in a ring array; a clamping mechanism 2, including a wire clamp 21 located above the insulating protective layer 1, a snap-fit ​​boss 22 fixedly connected to the side of the wire clamp 21 away from each other, and a metal conductor 23 fixedly connected to the end of the wire clamp 21 away from the insulating protective layer 1 by a bolt 24.

[0018] The barbs 11 are evenly distributed on the inner wall of the insulating protective layer 1, and an annular groove for engaging and locking protrusions is formed between the two sets of barbs 11 along the axial direction of the protective layer.

[0019] The wire clamp 21 includes a top closed end 213 and a left arm 211 and a right arm 212 respectively disposed at both ends of the top closed end 213. The cross-section of the top closed end 213 is U-shaped and has elastic deformation properties.

[0020] The left arm 211 has a clamp 214 on both the front and back sides of its outer surface, and the right arm 212 has a clamp 215 on both the front and back sides of its inner surface. The distance between the clamps 214 is greater than the distance between the clamps 215.

[0021] The metal conductor 23 is detachably connected to the clamp 21.

[0022] The first clamp 214 and the second clamp 215 are in an meshing relationship.

[0023] The insulating protective layer 1 is molded from high-strength engineering plastic. Its inner wall has four sets of barbs 11 evenly distributed along the circumference. Each set of barbs 11 is spaced axially to form a multi-level anti-slip structure. The tips of the barbs 11 face the direction of wire insertion. When the wire is pushed in from the opening at the bottom of the protective layer, the inclined surfaces of the barbs 11 guide the wire smoothly into the protective layer. During reverse movement, the tips of the barbs 11 embed into the wire insulation layer or conductor surface, forming a multi-point mechanical locking mechanism. The axial spacing between adjacent sets of barbs 11 forms an annular groove, providing precise fitting space for the locking boss 22 of the clamping mechanism 2. This design ensures that the wire is evenly wrapped by the barbs 11 in the radial direction, and the axial force is dispersed through multiple sets of barbs 11, effectively resisting external pulling forces.

[0024] The wire clamp 21 is made of sheet metal stamped into a U-shaped symmetrical structure. The top closed end 213 connects to the left and right side walls to form an elastic clamp. The left and right side walls of the wire clamp have gradually widening openings from top to bottom. The closed end is reserved with mounting holes for bolts 24. Two sets of snap-fit ​​protrusions 22 are symmetrically arranged on the outer side wall of the wire clamp 21 (the side away from the insulation layer). Their positions correspond to the annular grooves of the insulation protection layer 1. During installation, radial pressure is applied to the wire clamp 21 with a special tool to make the snap-fit ​​protrusions 22 snap into the grooves to form a connection. At this time, the elastic deformation of the U-shaped clamp generates a continuous clamping force. During the insertion of the wire, the wire cannot be exposed through the insulation protection layer 1, which would cause the metal core to be exposed and cause a short circuit risk. At this time, the structure of the wire clamp 21 provides a limiting function for the wire.

[0025] The left arm 211 of the wire clamp 21 has an integrally formed clamping plate 214 on its outer surface (front and rear sides), and the right arm 212 has a corresponding clamping plate 215 on its inner surface (front and rear sides). The clamping plates 214 and 215 are staggered: the horizontal distance between the clamping plates 214 is slightly larger than that between the clamping plates 215. During the clamping process of the wire clamp 21, the clamping plates 215 gradually insert into the gap of the clamping plates 214 to form a stepped engagement.

[0026] The metal conductor 23 is detachably connected to the top closed end 213 of the clamp 21 via bolts 24. The conductor contact surface is silver-plated to reduce contact resistance, and a positioning groove matching the opening of the clamp 21 is provided at the bottom, allowing for quick alignment during installation by snapping it into place. Maintenance only requires removing one side of the bolts 24 to separate the conductor module without damaging the overall structure. This design separates the conductive components from the mechanical clamping components: the clamp 21 focuses on providing stable clamping force, while the conductor module independently handles current conduction, improving heat dissipation and facilitating conductor specification changes based on current ratings.

[0027] During installation, the operator inserts the wire into the insulating protective layer 1 until it reaches the limit, and the barb system 11 automatically completes the initial fixation. Then, the wire clamp 21 is fastened to the protective layer, and the engagement of the fastening boss 22 and the annular groove forms axial positioning. At this point, the U-shaped clamp naturally wraps around the outer wall of the protective layer. When the bolt 24 is tightened, the clamp undergoes elastic deformation, and the left and right side walls retract synchronously, driving the clamping system to complete the progressive crimping of the wire. The entire process requires no special crimping tools; the crimping force can be precisely controlled by the torque of the bolt 24. Disassembly is performed in reverse; the elastic recovery characteristic of the clamp allows for non-destructive separation of the components.

[0028] This cold-pressed terminal block achieves a high level of performance in applications such as mechanical interlocking, elastic deformation, and modular design. By integrating mechanical interlocking, elastic deformation, and modular design, it simplifies the installation process while providing shock resistance, maintainability, and contact reliability that are difficult to achieve with traditional crimp terminals. It is particularly suitable for applications with stringent requirements for connector performance, such as rail transit and new energy equipment.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention 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 the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-reliability cold-pressed terminal block, comprising: The insulating protective layer (1) has four sets of axially spaced barbs (11) arranged in a ring array on the inner wall of the insulating protective layer (1). Its characteristic is that it further includes: The clamping mechanism (2) includes a wire clamp (21) located above the insulating protective layer (1). The wire clamp (21) is fixedly connected to a fastening boss (22) on the side away from each other. The end of the wire clamp (21) away from the insulating protective layer (1) is fixedly connected to a metal conductor (23) by a bolt (24).

2. The high-reliability cold-pressed terminal block according to claim 1, characterized in that: The barbs (11) are evenly distributed on the inner wall of the insulating protective layer (1), and an annular groove for engaging and locking protrusions is formed between the two sets of barbs (11) along the axial direction of the protective layer.

3. The high-reliability cold crimp terminal of claim 1, wherein: The clamp (21) includes a top closed end (213) and a left arm (211) and a right arm (212) respectively disposed at both ends of the top closed end (213). The cross section of the top closed end (213) is U-shaped and has elastic deformation properties.

4. The high-reliability cold crimp terminal of claim 3, wherein: The left arm (211) has a clamping plate 1 (214) on the front and back sides of its outer surface, and the right arm (212) has a clamping plate 2 (215) on the front and back sides of its inner surface. The distance between the clamping plates 1 (214) is greater than the distance between the clamping plates 2 (215).

5. The high-reliability cold crimp terminal of claim 1, wherein: The metal conductor (23) is detachably connected to the clamp (21).

6. The high-reliability cold crimp terminal of claim 4, wherein: The clamping plate one (214) and the clamping plate two (215) are in an meshing relationship.

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