An open-type cold-pressed terminal block

Abstract

This utility model relates to the field of terminal block technology, specifically disclosing an open-type cold-pressed terminal block, comprising: an O-shaped terminal; a crimping fixing end located below the O-shaped terminal, the crimping fixing end having a V-shaped groove inside, the O-shaped terminal being slidably connected to the V-shaped groove; a wire insertion end fixedly connected below the crimping fixing end, the inner wall of the wire insertion end having three sets of annular bosses of different sizes, the annular bosses being fixedly connected to the inner wall of the wire insertion end; and a stainless steel braided mesh fixedly connected below the wire insertion end, the stainless steel braided mesh being annular, and a silicone corrugated tube being provided on the outer side of the stainless steel braided mesh, the silicone corrugated tube being fixedly connected to the wire insertion end. This structure transforms the stress distribution of the wire from point concentration to mesh dispersion during repeated bending, significantly reducing the risk of metal fatigue fracture and providing a reliable integrated solution for connection and protection in high-frequency dynamic bending scenarios.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, specifically to an open-type cold-pressed terminal block. Background Technology

[0002] In the field of electrical connections, cold-pressed terminals are core components for achieving reliable connections between wires and between wires and electrical equipment. Their performance directly determines the stability and service life of the system. However, in dynamic application scenarios involving vibration, swaying, or frequent movement, the design defects of traditional cold-pressed terminals are becoming increasingly apparent. Typical application scenarios include robot joints, aviation wiring harnesses, and high-voltage wiring harnesses for new energy vehicles. Their conductors need to withstand high-frequency bending, torsion, and tensile loads, and traditional rigid sheath structures expose significant limitations under such conditions.

[0003] Existing improvement solutions mostly focus on passive protection, such as absorbing deformation energy by increasing the reserved length of the wire or wrapping the outer layer with a rubber sheath to buffer vibration. Although these solutions can delay the failure process, they have a fundamental drawback: the reserved wire increases the system size, making it difficult to apply in space-sensitive scenarios such as aviation and automotive. To address this, we propose an open-type cold-pressed terminal block. Utility Model Content

[0004] The purpose of this utility model is to provide an open-type cold-pressed terminal block to solve the problem mentioned in the background art that its conductors need to withstand high-frequency bending, torsion and tensile loads.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an open-type cold-pressed terminal block, comprising an O-shaped terminal; a crimping fixing end located below the O-shaped terminal, the crimping fixing end having a V-shaped groove inside, the O-shaped terminal being slidably connected to the V-shaped groove; a wire insertion end fixedly connected below the crimping fixing end, the inner wall of the wire insertion end having three sets of annular bosses of different sizes, the annular bosses being fixedly connected to the inner wall of the wire insertion end; and a stainless steel braided mesh fixedly connected below the wire insertion end, the stainless steel braided mesh being annular, a silicone corrugated tube being provided on the outer side of the stainless steel braided mesh, the silicone corrugated tube being fixedly connected to the wire insertion end.

[0006] An LED light is fixedly connected above the wire clamping end, and the LED light is located on one side of the O-shaped terminal.

[0007] Among them, the dimensions of the three sets of annular bosses gradually decrease from the crimping and fixing end to the wire insertion end.

[0008] The stainless steel woven mesh has mounting holes inside, and a pressure sensor is fixedly connected inside the mounting holes.

[0009] Among them, a shape memory alloy ring is fixedly connected to the inner wall of the crimping and fixing end.

[0010] The outer side of the annular boss is serrated, forming a corresponding trapezoidal groove.

[0011] This invention has at least the following beneficial effects: First, the composite sheath adopts a nested structure of metal braided mesh and silicone corrugated tube. The inner stainless steel braided mesh converts axial tension into shear deformation, while the outer silicone corrugated tube compensates for bending displacement in different directions through staggered expansion and contraction. Second, it adopts a stepped boss array with a gradually decreasing height, forming a natural stress relief layer through the gradual transition of geometric morphology, effectively avoiding the stress peak effect generated by traditional single-point contact structures, and significantly improving the fatigue resistance of the connection parts. At the same time, the sheath root integrates a shape memory alloy ring with temperature response and a pressure monitoring module, which automatically adjusts the clamping force through the material phase change characteristics to ensure the tightness of the protective structure under low temperature contraction and high temperature expansion environments. The above measures change the stress distribution of the conductor from point concentration to mesh dispersion when it is repeatedly bent, significantly reducing the risk of metal fatigue fracture. At the same time, the synergistic effect of materials and structure enhances environmental adaptability, providing a reliable integrated connection and protection solution for high-frequency dynamic bending scenarios. 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] Figure 4 This is a front view structural diagram of the present invention;

[0016] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at point B.

[0017] In the diagram: 1. O-ring terminal; 2. Crimping fixing end; 21. V-groove; 22. LED light; 23. Memory alloy ring; 3. Wire insertion end; 31. Annular boss; 32. Stainless steel braided mesh; 33. Silicone corrugated tube; 34. Mounting hole; 35. Pressure sensor; 36. Trapezoidal groove. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-5 This utility model provides a technical solution: an open-type cold-pressed terminal block, including an O-shaped terminal 1; a crimping fixing end 2, located below the O-shaped terminal 1, with a V-shaped groove 21 inside the crimping fixing end 2, the O-shaped terminal 1 and the V-shaped groove 21 being slidably connected; a wire insertion end 3, fixedly connected below the crimping fixing end, with three sets of annular bosses 31 of different sizes provided on the inner wall of the wire insertion end 3, the annular bosses 31 being fixedly connected to the inner wall of the wire insertion end 3; a stainless steel braided mesh 32 fixedly connected below the wire insertion end 3, the stainless steel braided mesh 32 being annular, and a silicone corrugated tube 33 provided on the outer side of the stainless steel braided mesh 32, the silicone corrugated tube 33 being fixedly connected to the wire insertion end 3.

[0020] An LED light 22 is fixedly connected above the wire clamping end, and the LED light 22 is located on one side of the O-type terminal 1.

[0021] The dimensions of the three sets of annular bosses 31 gradually decrease from the crimping and fixing end 2 towards the wire insertion end 3.

[0022] The stainless steel woven mesh 32 has an installation hole 34 inside, and a pressure sensor 35 is fixedly connected inside the installation hole 34.

[0023] A shape memory alloy ring 23 is fixedly connected to the inner wall of the crimped fixed end 2.

[0024] The outer side of the annular boss 31 is serrated, forming a corresponding trapezoidal groove 36.

[0025] The O-shaped terminal 1 (metal conductor connector) is annular, with its lower end embedded in the V-shaped groove 21 of the crimping and fixing end 2. After the insulation layer at the end of the conductor is stripped, the conductor bundle is inserted into the conductor insertion end 3. The inner wall of the conductor insertion end 3 is provided with three sets of annular bosses 31, the size of which decreases gradually from the crimping and fixing end 2 to the conductor insertion end 3 (e.g., the outer diameter of the upper boss is 8mm, the middle boss is 6mm, and the lower boss is 4mm). The outer side of the boss is serrated, forming a trapezoidal groove 36. When the conductor passes through, the serrations are embedded in the surface of the conductor insulation layer, providing an initial axial anti-reverse force and guiding the conductor to be positioned along the central axis.

[0026] A ring-shaped stainless steel braided mesh 32 (inner anti-bending layer) extends below the wire insertion end 3. Its mesh has an interlaced structure. The outer side of the stainless steel braided mesh 32 is tightly wrapped with a silicone corrugated tube 33 (outer dynamic compensation layer). When bent, the outer corrugated tube absorbs the swing energy through the compression and extension of the folds. At the same time, the staggered corrugations prevent excessive deformation in the same direction, thus enhancing the overall flexibility.

[0027] Three sets of bosses are set at the end of the wire and terminal crimping, with the height increasing from low to high to form a "stepped slope". When the wire bends, the stress is first transferred to the shortest boss, and then to the higher bosses in turn. The impact force is dispersed by gradually raising the bosses. Each boss has an inclined trapezoidal groove on its surface. The bending stress will spread to both sides along the inclination of the groove, avoiding vertical impact on a local area and reducing the risk of metal fatigue.

[0028] A shape memory alloy ring 23 is installed at the base of the sheath. This ring contracts when exposed to high temperatures. The pressure sensor 35, located within the stainless steel braided mesh 32, does not directly detect bending pressure but rather monitors the tightness of the contact between the wire and the terminal crimping area. When the wire bends, the relative displacement between the sheath and the wire causes a change in clamping force. The pressure sensor 35 indirectly reflects the stress state of the wire by detecting the radial pressure value exerted by the shape memory alloy ring 23 on the wire. The shape memory alloy ring 23 undergoes a phase change and contracts due to temperature increase, actively tightening the sheath. The pressure sensor 35 detects an increase in clamping force. If it reaches a safety threshold, the LED 22 illuminates green, indicating "normal clamping." If the sensor detects abnormal pressure (such as insufficient clamping force due to wire deformation), the LED 22 turns red, indicating the need for maintenance. This device provides real-time feedback from the sensor, providing early warnings of problems such as loose wires and aging sheaths, preventing sudden breakage.

[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. An open-type cold-pressed terminal block, comprising: O-shaped terminal (1); Its characteristic is that it further includes: A crimping fixing end (2) is located below the O-shaped terminal (1). A V-shaped groove (21) is provided inside the crimping fixing end (2). The O-shaped terminal (1) is slidably connected to the V-shaped groove (21). The wire insertion end (3) is fixedly connected to the bottom of the wire clamping end. The inner wall of the wire insertion end (3) is provided with three sets of annular bosses (31) of different sizes. The annular bosses (31) are fixedly connected to the inner wall of the wire insertion end (3). A stainless steel braided mesh (32) is fixedly connected below the wire insertion end (3). The stainless steel braided mesh (32) is ring-shaped. A silicone corrugated tube (33) is provided on the outside of the stainless steel braided mesh (32). The silicone corrugated tube (33) is fixedly connected to the wire insertion end (3).

2. An open cold press terminal according to claim 1, wherein: An LED light (22) is fixedly connected above the wire fixing end, and the LED light (22) is located on one side of the O-shaped terminal (1).

3. An open cold press terminal according to claim 1, wherein: The dimensions of the three sets of annular bosses (31) gradually decrease from the crimping fixing end (2) towards the wire insertion end (3).

4. An open cold press terminal according to claim 1, wherein: The stainless steel woven mesh (32) has an installation hole (34) inside, and a pressure sensor (35) is fixedly connected inside the installation hole (34).

5. An open cold press terminal according to claim 1, wherein: A shape memory alloy ring (23) is fixedly connected to the inner wall of the crimping and fixing end (2).

6. An open cold press terminal according to claim 3, wherein: The outer side of the annular boss (31) is serrated, forming a corresponding trapezoidal groove (36).

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