Copper terminal cable with anti-loosening structure

Abstract

The utility model relates to the technical field of power cable connection discloses copper wiring terminal cable with anti -loose structure, including wiring terminal, the outside fixed connection of wiring terminal has cable, the outside screw thread connection of wiring terminal has bolt, the outside fixed connection of bolt has spring washer, the inside fixed connection of wiring terminal has anti -loose mechanism, the outside fixed connection of wiring terminal has the protection mechanism, the anti -loose mechanism includes connecting wire, the outside fixed connection of connecting wire is in the outside of cable, the outside fixed connection of connecting wire has annular electric wire, the outside screw thread connection of bolt has two -way nut no.

Description

Technical Field

[0001] This utility model relates to the field of power cable connection technology, and in particular to copper terminal cables with anti-loosening structures. Background Technology

[0002] In industrial automation equipment, it can cope with high-frequency vibration environments such as motors and frequency converters. Its anti-loosening design avoids downtime caused by loose terminals. In new energy-related scenarios, such as photovoltaic inverters and energy storage equipment with high current connection scenarios, its anti-loosening performance and conductivity stability can ensure efficient power transmission. In rail transit and engineering machinery, it can withstand strong impacts and bumps, ensuring the safe operation of vehicle electrical equipment and field operation equipment.

[0003] A search revealed Chinese Patent Publication No. CN218731838U, which discloses a copper-aluminum terminal block for cables, belonging to the field of terminal block technology. It includes a copper body and an aluminum body connected to the copper body. One end of the aluminum body has a groove, and a rotating plate is rotatably connected within the groove. A cross-shaped groove is formed on the rotating plate. One end of the copper body is fixedly connected to a cross-shaped block that inserts into the cross-shaped groove. A nut is fixedly connected to the outside of the copper body, and the nut is threadedly connected to the aluminum body. A sealing gasket is provided between the aluminum body and the copper body. This application enables rapid assembly and allows for the separate removal, replacement, and maintenance of either the aluminum or copper body, making it very convenient and economical.

[0004] However, as described in the above text, while achieving splicing, it is impossible to prevent loosening. This inability to prevent loosening leads to a decrease in electrical connection stability, causing poor contact, overheating, or even short circuit risks. Under conditions such as vibration and impact, the terminals are prone to arcing due to loosening, accelerating conductor oxidation and corrosion, requiring frequent maintenance and tightening, and increasing operation and maintenance costs. Therefore, copper terminal cables with anti-loosening structures are proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a copper terminal cable with an anti-loosening structure, which aims to solve the problem that some terminals in the prior art cannot achieve anti-loosening.

[0006] To achieve the above objectives, the present invention provides a copper terminal cable with an anti-loosening structure, comprising a terminal, a cable fixedly connected to the outside of the terminal, a bolt threadedly connected to the outside of the terminal, a spring washer fixedly connected to the outside of the bolt, an anti-loosening mechanism fixedly connected to the inside of the terminal, and a protective mechanism fixedly connected to the outside of the terminal; the anti-loosening mechanism includes a connecting wire, which is fixedly connected to the outside of the cable, and a ring wire fixedly connected to the outside of the connecting wire; a first double-ended nut is threadedly connected to the outside of the bolt, a limit component is fixedly connected to the outside of the first double-ended nut, and a second double-ended nut is threadedly connected to the inside of the terminal.

[0007] Optionally, the limiting component includes a fixing rod, which is externally fixedly connected to the inside of the terminal block, and a limiting ring is externally fixedly connected to the fixing rod.

[0008] Optionally, the protective mechanism includes a waterproof layer, the exterior of which is fixedly connected to the interior of the terminal block, and an anti-corrosion layer is fixedly connected to the exterior of the waterproof layer.

[0009] Optionally, a heat-resistant layer is fixedly connected to the outside of the anti-corrosion layer, and an insulating layer is fixedly connected to the outside of the heat-resistant layer.

[0010] Optionally, the terminal block has a connection hole on its exterior, and multiple fixing rods are fixedly connected inside the terminal block.

[0011] Optionally, a two-way nut is slidably connected to the outside of the second fixing rod, a limit ring is fixedly connected to the top of the second fixing rod, and a sealing ring is fixedly connected to the outside of the terminal block.

[0012] Optionally, the terminal block is internally fixedly connected to a plurality of fixing rods, and the bidirectional nut is externally slidably connected to the outside of the fixing rods.

[0013] Optionally, the outer part of the ring wire is fixedly connected to the outside of the connecting wire, the outer thread of the double-ended nut is connected to the inside of the terminal block, and the outer part of the double-ended nut is in contact with the outer part of the ring wire.

[0014] The novel piercing-type connecting wire harness provided in this utility model embodiment has at least one of the following technical effects:

[0015] 1. In this utility model, by placing the cable into the rotating bolt, the bolt drives the spring washer to move, causing the first bidirectional nut to slide on the first fixed rod, and then causing the second bidirectional nut to move outside the bolt, thereby effectively preventing loosening of the connection, ensuring long-term stability of the electrical connection, avoiding power failure or fire hazards caused by loose terminals, and ensuring safe and efficient operation of electricity.

[0016] 2. In this utility model, a protective mechanism is provided inside the terminal block, which prevents water vapor from entering and conductors from corroding; the anti-corrosion layer resists chemical corrosion; the temperature-resistant layer adapts to high and low temperature environments and maintains connection stability; the insulation layer isolates the conductor and eliminates the risk of leakage. The multiple protective measures work together to ensure the cable operates safely and reliably under complex working conditions, reduce the probability of failure, and improve durability and safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of the copper terminal cable with anti-loosening structure proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the sealing ring structure of the copper terminal cable with anti-loosening structure proposed in this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the insulation layer of the copper terminal cable with anti-loosening structure proposed in this utility model.

[0022] The following are the labeling elements in the figure:

[0023] 1—Terminal; 2—Cable; 3—Bolt; 4—Spring washer; 5—Connecting hole; 6—Connecting wire; 7—Ring wire; 8—Double-acting nut one; 9—Fixing rod one; 10—Limiting ring one; 11—Fixing rod two; 12—Limiting ring two; 13—Double-acting nut two; 14—Sealing ring; 15—Waterproof layer; 16—Anti-corrosion layer; 17—Heat-resistant layer; 18—Insulation layer. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0028] In one embodiment of this utility model, such as Figures 1 to 3A copper terminal cable with anti-loosening structure includes a terminal 1, which is a hollow cylindrical shape with one end open as the access end of a cable 2. The inner diameter is precisely matched to the diameter of the cable 2. The cable 2 is fixedly connected to the outside of the terminal 1. A bolt 3 is threadedly connected to the outside of the terminal 1. The bolt 3 penetrates vertically through the contact part between the terminal 1 and the wire core. It is tightened clockwise with a wrench using a hexagonal head. The bolt 3 further presses the wire core into the inside of the terminal 1. A spring washer 4 is fixedly connected to the outside of the bolt 3. The spring washer 4 undergoes elastic deformation under pressure, generating continuous elastic force along the axial direction. It fits tightly against the head of the bolt 3 and the surface of the terminal 1. By increasing the friction of the contact surface, it effectively reduces the tendency of the bolt 3 to loosen due to vibration. An anti-loosening mechanism is fixedly connected inside the terminal 1, and a protective mechanism is fixedly connected to the outside of the terminal 1.

[0029] The anti-loosening mechanism includes a connecting wire 6, which has good flexibility and conductivity. One end of the connecting wire 6 is tightly wound and fixed to the root of the wire core of the cable 2 after the insulation layer 18 has been removed, ensuring a stable electrical connection. The connecting wire 6 is externally fixed to the outside of the cable 2. A ring wire 7 is externally fixed to the connecting wire 6. A double-ended nut 8 is externally threaded to the bolt 3. The double-ended nut 8 is a cylinder with flanges at both ends. The outer surface is knurled to form a fine anti-slip texture. A limit component is externally fixed to the double-ended nut 8. The inner part of the terminal 1... The threaded connection includes a two-way nut 13. The limiting component includes a fixing rod 9, which is a cylindrical rod that is perpendicular to the inside of the terminal 1. Its axis is parallel to the axis of the bolt 3. The fixing rod 9 is externally fixedly connected to the inside of the terminal 1. The fixing rod 9 is externally fixedly connected to a limiting ring 10. When the bolt 3 is tightened, the two two-way nuts abut against the annular wire 7 to form a double nut clamping structure. The friction between the nuts and the annular wire 7, as well as the constraint of the limiting component, jointly achieve double anti-loosening fixation of the bolt 3.

[0030] In another embodiment of this utility model, such as Figures 2 to 4The protective mechanism includes a waterproof layer 15, which is a thin-walled annular structure. The inner wall of the waterproof layer is tightly attached to the outer surface of the terminal 1. It is integrally formed with the terminal body through hot melt injection molding. When punctured by a sharp object, the material around the puncture will automatically shrink and close to prevent water from seeping in. The waterproof layer 15 is fixedly connected to the inside of the terminal 1. The waterproof layer 15 is also fixedly connected to an anti-corrosion layer 16, which covers the waterproof layer 15 and is shaped like a honeycomb grid. Each hexagonal grid unit can deform independently. When acid or alkali substances corrode, the grid structure can effectively disperse the corrosive force and delay the penetration of the medium. The anti-corrosion layer 16 is fixedly connected to a heat-resistant layer 17, which automatically expands to fill the gaps at high temperatures and shrinks into a tight state at low temperatures, always tightly attached to the inner and outer layers. The heat-resistant layer 17 is fixedly connected to an insulating layer 18, which is a hard cylindrical shell with spirally distributed heat dissipation grooves on the surface. It not only isolates external conductors but also quickly dissipates the heat generated by the operation of the terminal 1. The terminal 1 has a connection hole 5 on its outside.

[0031] Multiple fixing rods 11 are fixedly connected internally to terminal 1. A two-way nut 13 is slidably connected externally to fixing rod 11. A limit ring 12 is fixedly connected to the top of fixing rod 11. A sealing ring 14 is fixedly connected externally to terminal 1. Multiple fixing rods 9 are fixedly connected internally to terminal 1. A two-way nut 8 is slidably connected externally to fixing rod 9. A ring wire 7 is fixedly connected externally to connecting wire 6. A two-way nut 8 is threadedly connected internally to terminal 1. The external part of the two-way nut 8 contacts the external part of the ring wire 7. When bolt 3 tends to loosen due to vibration, the two-way nut 8 attempts to slide down due to inertia, but the ring flange is blocked by the flipped ring wire 7. At the same time, the two-way nut 13 cannot move under the constraint of the limiting structure of fixing rod 11. The two nuts form a tension network through the ring wire 7, which converts the vibration energy into friction between the threads, achieving double anti-loosening protection and ensuring the long-term stability and reliability of the cable 2 connection.

[0032] Working principle: By inserting the core of cable 2 into the open end of terminal 1, the bolt 3 passes vertically through the threaded hole on the side wall of terminal 1, pressing the core of cable 2 into the terminal. At the same time, the spring washer 4 on the bolt 3 is deformed under pressure, generating axial elastic force to fit the bolt 3 against the terminal surface. Then, the double-ended nut 8 is screwed into the bolt 3, which slides along the cylindrical fixing rod 9 and is restricted by the limiting ring 10. Then, the double-ended nut 13 is screwed into the terminal 1 and slides along the corresponding fixing rod. The flange of the double-ended nut 8 pushes the ring wire 7 to rotate around the hinge point of the connecting wire 6. Finally, the two double-ended nuts press against the ring wire 7. By using the friction between the nuts and the wire and the limiting constraint, the bolt 3 is double-locked.

[0033] The protective mechanism employs a four-layer tightly nested structure to provide all-round protection for terminal 1. The waterproof layer 15 is a hollow cylindrical shape with fine barbed protrusions on the inner wall. It is fitted onto the outside of terminal 1 with an interference fit. When exposed to water, the water pressure causes the protrusions to tighten, forming a strong seal. The anti-corrosion layer 16 is shaped like a honeycomb grid and covers the outside of the waterproof layer 15, effectively dispersing the corrosive force of acids and alkalis and delaying the penetration of media. The heat-resistant layer 17 is a flexible annular colloid that automatically expands to fill gaps at high temperatures and shrinks to tighten at low temperatures. The spiral heat dissipation grooves on the surface of the insulation layer 18 not only isolate the conductor but also quickly dissipate the operating heat of terminal 1. The sealing ring 14 expands its lip to fit the mounting surface under external pressure, preventing water vapor and dust from entering.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Copper terminal cable with anti-loosening, comprising a terminal (1), characterized in that: The terminal block (1) is externally fixedly connected to a cable (2), the terminal block (1) is externally threadedly connected to a bolt (3), the bolt (3) is externally fixedly connected to a spring washer (4), the terminal block (1) is internally fixedly connected to an anti-loosening mechanism, and the terminal block (1) is externally fixedly connected to a protective mechanism. The anti-loosening mechanism includes a connecting wire (6), which is externally fixed to the outside of the cable (2). A ring wire (7) is externally fixed to the connecting wire (6). A double-ended nut (8) is externally threaded to the bolt (3). A limit component is externally fixed to the double-ended nut (8). A double-ended nut (13) is internally threaded to the terminal block (1).

2. The copper terminal cable with anti-loosening structure according to claim 1, characterized in that: The limiting assembly includes a fixing rod (9), which is externally fixedly connected to the inside of the terminal block (1), and a limiting ring (10) is externally fixedly connected to the fixing rod (9).

3. The copper terminal cable with anti-loosening structure according to claim 2, characterized in that: The protective mechanism includes a waterproof layer (15), the outside of which is fixedly connected to the inside of the terminal block (1), and an anti-corrosion layer (16) is fixedly connected to the outside of the waterproof layer (15).

4. The copper terminal cable with anti-loosening structure according to claim 3, characterized in that: The anti-corrosion layer (16) is fixedly connected to the outside of a heat-resistant layer (17), and the heat-resistant layer (17) is fixedly connected to the outside of an insulating layer (18).

5. The copper terminal cable with anti-loosening structure according to claim 4, characterized in that: The terminal block (1) has a connection hole (5) on its outside, and multiple fixing rods (11) are fixedly connected inside the terminal block (1).

6. The copper terminal cable with anti-loosening structure according to claim 5, characterized in that: The fixed rod 2 (11) is externally slidably connected to a two-way nut 2 (13), the top of the fixed rod 2 (11) is fixedly connected to a limit ring 2 (12), and the terminal block (1) is externally fixedly connected to a sealing ring (14).

7. The copper terminal cable with anti-loosening structure according to claim 2, characterized in that: The terminal block (1) is internally fixedly connected to a plurality of fixing rods (9), and the bidirectional nut (8) is externally slidably connected to the outside of the fixing rods (9).

8. The copper terminal cable with anti-loosening structure according to claim 1, characterized in that: The outer part of the ring wire (7) is fixedly connected to the outside of the connecting wire (6), and the outer part of the double-ended nut (8) is threadedly connected to the inside of the terminal (1). The outer part of the double-ended nut (8) is in contact with the outer part of the ring wire (7).

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