Bending-resistant cable

Abstract

The invention relates to the technical field of cables, and particularly discloses a bending-resistant cable which comprises a cable sheath, a cable core of a continuous zigzag structure is arranged in the cable sheath, and the cable core is provided with a plurality of first bending parts and second bending parts which are alternately arranged and connected end to end. A turning area is formed at the position of a corner between the first bending part and the second bending part, and a plurality of hard cable reinforcing blocks are arranged on the front side and the rear side of the cable sheath and are arranged at intervals in the length direction of the cable sheath. The cable has the beneficial effects that when the cable sheath is bent, the cable reinforcing block can effectively improve the local strength of the cable sheath in the cable core turning area, so that the curvature change of the cable core in the bending process can be remarkably reduced, the stress concentration phenomenon caused by bending is reduced, and the cable is more stable in performance. And the problems of abrasion and distortion caused by long-time repeated bending of the wire core can be effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and more specifically to a bend-resistant cable. Background Technology

[0002] Drag chain cables are highly flexible special cables that can move back and forth with a drag chain without being easily worn. They are also commonly known as drag cables or tank chain cables. In applications where equipment units need to move back and forth, cables are often placed in cable drag chains to prevent tangling, wear, pull-out, and scattering. This provides protection for the cables, and they can also move back and forth with the drag chain.

[0003] Chinese patent application CN117809889A discloses a bend-resistant cable and its manufacturing method. The cable includes a cable core wrapped with an insulation layer; a sealed protective cover layer with an internal receiving cavity in which the cable core is housed; wherein the receiving cavity is zigzag-shaped, and a bending cavity is formed at the bend corner of the receiving cavity. This application can improve the bend resistance of the cable, slow down the aging rate of the cable core at bends, and extend the service life of the cable.

[0004] Chinese Patent CN119993617B discloses a flat ribbon flexible cable. The flat ribbon flexible cable has a bending surface, and multiple distribution channels are sequentially formed near the bending surface. When the flat ribbon flexible cable is bent, it can form corresponding pre-bending sections, and pressure changes occur within the distribution channels at the pre-bending sections. This causes the flat ribbon flexible cable to bend in a preset direction or has a tendency to bend in a preset direction, thereby reducing the driving force required for bending in the preset direction. This avoids affecting the accuracy and efficiency of equipment movement, and prevents the phenomenon of accelerated cable structure fatigue due to repeated stress concentration, which could lead to signal transmission performance degradation or even breakage. This meets the requirements for efficient, reliable, and long-life operation of equipment.

[0005] In the above technical solution, the zigzag cable core arrangement structure will generate significant mechanical stress concentration in the turning area, and cause a significant reduction in the local bending radius. This special structure causes the bending point to be continuously subjected to periodic deformation pressure during dynamic use, resulting in continuous friction between conductors. Under long-term action, metal fatigue effect and mechanical wear form a dual destruction mechanism, ultimately causing quality problems such as damage to the core insulation layer and conductor breakage. This structural defect is particularly prominent under repeated bending conditions, significantly reducing the service life of cable products. Summary of the Invention

[0006] This invention provides a bend-resistant cable, aiming to solve the problem that in related technologies, the zigzag cable core arrangement structure causes significant mechanical stress concentration in the bending area, resulting in a substantial reduction in the local bending radius. This special structure causes the bending point to continuously bear periodic deformation pressure during dynamic use, leading to continuous friction between conductors. Under long-term action, metal fatigue and mechanical wear form a dual destruction mechanism, ultimately causing damage to the core insulation layer and conductor breakage.

[0007] The present invention discloses a bend-resistant cable, comprising: a cable sheath, a wire core having a continuous zigzag structure inside the cable sheath, the wire core having multiple alternating first and second bends connected end to end, a turning area being formed at the corner between the first and second bends, and multiple rigid cable reinforcing blocks being provided on both the front and rear sides of the cable sheath, the cable reinforcing blocks being spaced apart along the length of the cable sheath, the cable reinforcing blocks being embedded inside the cable sheath, and the cable reinforcing blocks in the front and rear directions being provided one-to-one with the turning areas of the wire core.

[0008] Beneficial Effects: The cable reinforcement block is strategically located at the bend in the cable core, a placement that allows it to play a crucial role when the cable sheath is bent. When the cable sheath bends, the reinforcement block, through its unique structure and material properties, effectively enhances the local strength of the bend area. This reinforcement significantly reduces the curvature change of the cable core during bending, minimizing stress concentration, and effectively prevents wear and torsional deformation that can occur due to repeated bending over time. The reinforcement block also avoids the risk of breakage caused by excessive bending, thus greatly extending the overall lifespan of the cable. This design significantly improves the cable's performance in applications involving repeated bending, ensuring its durability over long-term use.

[0009] Preferably, the cable sheath is further provided with a cable chain module. The cable chain module includes multiple cable chain units, which are connected end to end and can rotate with each other. Each cable chain unit includes two connecting plates symmetrically distributed front and back. A lower protective plate and an upper protective plate are fixedly installed on the inner side of the two connecting plates. The lower protective plate and the upper protective plate are arranged at intervals in the vertical direction. The connecting plates between two adjacent cable chain units can rotate with each other, and the inner side of the connecting plates is provided with a fixing bracket adapted to the cable reinforcement block.

[0010] Its effect is that the cable chain module is used to support and protect the cable sheath, preventing the cable sheath from being excessively twisted and deformed.

[0011] Preferably, each connecting plate includes a left connecting part and a right connecting part. A rotating shaft is provided on the outer side of the left connecting part. The axis of the rotating shaft extends in the front-back direction. A through mounting hole is provided on the left connecting part. The mounting hole is a circular structure adapted to the rotating shaft. Between two adjacent cable chain units, the rotating shaft on the left connecting part of the connecting plate is rotatably fitted into the mounting hole on the right connecting part of the adjacent connecting plate.

[0012] Preferably, the cable reinforcing block has an extension groove at one end on the inner side. The extension groove is a V-shaped structure that is concave inward, and the turning area extends to the inner side of the extension groove.

[0013] Preferably, the cable reinforcement block is made of glass fiber reinforced plastic or carbon fiber composite material.

[0014] Its effect is that this material can adapt to the actual application requirements of cables, not only providing sufficient support to ensure the stability and reliability of cables in various usage environments, but also having a significant advantage that it does not increase the overall weight of the cable.

[0015] Preferably, the cable sheath is made of polyurethane or thermoplastic polyester elastomer.

[0016] Preferably, the cable sheath has a core arrangement groove inside, and the core arrangement groove has a zigzag structure adapted to the core.

[0017] Preferably, the included angle of the turning area on the wire core is 60 degrees.

[0018] Preferably, the outer side of the wire core is also wrapped with an insulating layer or a shielding layer.

[0019] Its effect is to improve the anti-interference ability and signal quality of the wire core.

[0020] Preferably, the lower protective plate and the upper protective plate are coated with an anti-corrosion coating.

[0021] Its effect is to ensure long-term use in harsh working environments. Whether it is a humid, high-temperature or corrosive environment, it can maintain its good protective performance. This treatment method can effectively extend the service life of the protective plate.

[0022] By adopting the above technical solution, the beneficial effects of the present invention are as follows: The cable reinforcement block is strategically located at the bend in the cable core, a placement that plays a crucial role when the cable sheath is bent. When the cable sheath bends, the reinforcement block, through its unique structure and material properties, effectively enhances the local strength of the bend area. This reinforcement significantly reduces the curvature change of the core during bending, minimizing stress concentration, and effectively prevents wear and torsional deformation that can occur due to repeated bending over time. The reinforcement block also avoids the risk of breakage caused by excessive bending, thus greatly extending the overall lifespan of the cable. This design significantly improves the cable's performance in applications involving repeated bending, ensuring its durability over long-term use.

[0023] When the cable chain module bends, the cable reinforcement blocks on the front and rear sides are staggered, meaning there are staggered stress points on the cable sheath. At these stress points, supported by the fixing frame, no deformation occurs. However, the area between the two cable reinforcement blocks will bend and deform, with the deformed portion also staggered. This effectively reduces the bending curvature of the cable sheath at the core bending area, preventing damage to this area. The reduced bending curvature also decreases the mechanical stress at the core bending area, providing excellent protection and extending the cable's lifespan. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the wire core arrangement groove of the present invention.

[0026] Figure 3 This is a schematic diagram of the core structure of the present invention.

[0027] Figure 4 This is a top view of the connecting plate of the present invention.

[0028] Figure 5 This is a left view of the connecting plate of the present invention.

[0029] Figure 6 For the present invention Figure 5 Sectional view of AA.

[0030] Figure 7 This is a schematic diagram of the bending shape of the cable sheath of the present invention.

[0031] Figure 8 This is a schematic diagram of the extension groove of the present invention.

[0032] Figure label: 10. Cable sheath; 11. Core arrangement groove; 12. First bending section; 13. Second bending section; 14. Core; 15. First bending part; 16. Second bending part; 20. Cable reinforcing block; 21. Extension groove; 30. Connecting plate; 31. Left connecting part; 32. Right connecting part; 33. Rotating shaft; 34. Fixing frame; 35. Lower protective plate; 36. Upper protective plate. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] Cables are widely used in industrial automation, robotics, logistics systems, and rail transportation, where they frequently need to bend repeatedly as equipment moves. For example, in industrial robotic arms, AGVs, and cable chain systems, frequent bending of cables can lead to material fatigue and wear, which in turn affects the stability of signal transmission and power supply, and may even cause malfunctions such as wire breakage.

[0035] Bending causes stress concentration in the conductor 14, especially at the commutation point, resulting in uneven stress distribution and accelerating metal fatigue. Simultaneously, friction between conductors 14 wears down the insulation layer and sheath, reducing insulation performance and increasing the risk of short circuits. Furthermore, frequent bending can lead to shielding layer breakage, affecting electromagnetic compatibility, especially in high-frequency signal transmission. Shielding failure can cause signal interference, impacting equipment accuracy.

[0036] The arrangement of the conductors 14 in the drag chain cable directly affects the stress distribution. If a tight, zigzag or bundled arrangement is used, significant stress concentration will occur at the reversing position of the conductors 14 when the drag chain bends, resulting in excessive local bending curvature. This design will subject the conductors 14 to deformation pressure during repeated movements, accelerating metal fatigue. Furthermore, without an effective central filling or separating structure, friction is likely to occur between the conductors 14, further exacerbating wear.

[0037] like Figures 1 to 8As shown, this invention provides a specific embodiment of a bend-resistant cable, which mainly consists of two core modules: a cable module and a cable chain module. The cable module is mounted on the cable chain module, and the two are tightly integrated to form a complete structure. The main function of the cable chain module is to provide comprehensive and effective mechanical protection for the cable module, specifically preventing the cable module from suffering various forms of mechanical damage such as tension, compression, abrasion, and torsion in complex operating environments, thereby significantly extending its service life. In addition, the cable chain module also has the function of orderly guiding the cable module, ensuring that the cable maintains a non-tangled and non-interfering state in various motion states such as linear motion, rotational motion, and reciprocating motion, thereby ensuring the stability of the cable's movement trajectory and its reliability in various application scenarios.

[0038] like Figure 2 , Figure 3 as well as Figure 8 As shown, the cable module consists of several key parts, specifically including a cable sheath 10, a core arrangement groove 11, cores 14, and a cable reinforcement block 20. In this embodiment, the cable sheath 10 has a structure with a specific width. This width design is intended to better accommodate the special arrangement shape of the cores 14, ensuring that the cores 14 can be stably and orderly arranged inside the cable sheath 10. The shape and arrangement of the core arrangement groove 11 and the cores 14 will be described in detail later.

[0039] Furthermore, the cable sheath 10 is made of either PUR (polyurethane) or TPEE (thermoplastic polyester elastomer). These two high-performance materials not only possess excellent abrasion resistance, effectively reducing wear during prolonged use and extending the overall lifespan of the cable, but also offer significant resistance to external physical impacts and damage. This characteristic makes the cable less susceptible to environmental damage during use, further enhancing its durability. Simultaneously, these two materials also exhibit good flexibility, ensuring the cable maintains good suppleness and flexibility under complex operating conditions such as bending and stretching, preventing performance degradation due to frequent deformation. In addition, both materials possess excellent durability, maintaining stable performance in various operating environments, such as high temperature, low temperature, and humidity, ensuring the reliability and safety of the cable and meeting the needs of different application scenarios.

[0040] In terms of electrical performance, PUR and TPEE possess excellent insulation properties and voltage withstand capabilities, effectively preventing current leakage and short circuits, and ensuring the safe operation of circuit systems. This characteristic is particularly important for power transmission and control systems requiring high safety standards, ensuring accurate signal transmission and stable system operation, and avoiding safety hazards caused by insufficient material performance. Furthermore, PUR and TPEE are chosen because these two materials are easy to process and shape, allowing for flexible design of cable structures and dimensions according to specific needs, improving production efficiency and reducing manufacturing costs.

[0041] The cable sheath 10 has a core arrangement groove 11 inside. In this specific application, the core arrangement groove 11 has a continuous and regular zigzag structure. The core arrangement groove 11 can flexibly accommodate multiple strands of core 14. Its adaptability can be flexibly set according to actual usage requirements. It can accommodate 2 strands of core 14 or be expanded to 6 or even more strands of core 14 to meet the application requirements in different scenarios. The core arrangement groove 11 includes multiple first bending sections 12 and second bending sections 13. The multiple first bending sections 12 and second bending sections 13 are arranged alternately, and the first bending sections 12 and second bending sections 13 are connected end to end to form a continuous whole.

[0042] The core arrangement groove 11 not only serves to accommodate the core 14, but more importantly, it guides the core 14 to be correctly positioned. The cross-sectional shape of the core arrangement groove 11 is highly matched to that of the core 14. This matching design effectively reduces friction and compression between the cores 14, thereby ensuring signal stability during transmission. Furthermore, the inner wall surface of the core arrangement groove 11 is smooth and delicate. This characteristic is particularly noticeable when bending cables, as it significantly reduces resistance during bending, effectively protecting the core 14 from damage by external forces and extending the cable's lifespan.

[0043] In this specific design, the first curved segment 12 gradually slopes downwards from left to right; while the second curved segment 13 slopes upwards from left to right in the opposite direction. It is particularly noteworthy that there is an angle between adjacent first curved segments 12 and second curved segments 13. The specific size of this angle is not fixed and can be flexibly set according to actual application needs and design requirements. Specifically, the angle can be an acute angle, such as 40 degrees or 60 degrees; or an obtuse angle, such as 100 degrees or 120 degrees. In short, the angle design between the first curved segment 12 and the second curved segment 13 has great flexibility and can be appropriately adjusted and set according to actual needs to meet different functional and usage requirements.

[0044] like Figure 3As shown, a wire core 14 is disposed in the wire core arrangement groove 11 of the cable sheath 10. Similarly, the wire core 14 can be a single strand or multiple strands, adapted to the wire core arrangement groove 11. The wire core 14 is embedded in the wire core arrangement groove 11 according to a predetermined arrangement to ensure the compactness of the overall structure. The wire core 14 has a first bend 15 and a second bend 16. There are multiple first bends 15 and second bends 16, and the first bends 15 and second bends 16 are connected end to end. There is an angle between the first bends 15 and second bends 16, and the corner of the first bends 15 and second bends 16 is a turning area. The first bends 15 and second bends 16 are respectively adapted to the first bend section 12 and the second bend section 13 of the wire core arrangement groove 11. That is, the first bend 15 is adapted to the first bend section 12, and the second bend 16 is adapted to the second bend section 13.

[0045] Core 14, as the core component for transmitting electrical or data signals, is typically made of multiple strands of fine copper wire twisted together to increase conductivity and tensile strength. Depending on the application, core 14 may also be wrapped with an insulation layer or a shielding layer to improve anti-interference capability and signal quality.

[0046] like Figure 2 As shown, multiple cable reinforcement blocks 20 are evenly distributed on both the front and rear sides of the cable sheath 10 (specifically, on both sides of the cable sheath 10 in its width direction). These cable reinforcement blocks 20 are spaced apart along the length of the cable sheath 10, ensuring their uniform distribution throughout the entire cable length. Each cable reinforcement block 20 is embedded inside the cable sheath 10 to enhance its tight fit with the cable sheath 10. Furthermore, the cable reinforcement blocks 20 in the front-to-back direction are correspondingly arranged one-to-one with the turning areas of the wire core 14; that is, whenever the wire core 14 forms an angle, a corresponding cable reinforcement block 20 is provided to provide additional support and protection. The cable reinforcement blocks 20 on the front and rear sides are staggered.

[0047] The cable reinforcement block 20 is positioned at a critical location inside the cable sheath 10, and its main function is to significantly enhance the overall mechanical strength of the cable. Specifically, since the cable reinforcement block 20 is located precisely at the bend area of ​​the wire core 14, this arrangement allows it to play a crucial role when the cable sheath 10 is bent. When the cable sheath 10 bends, the cable reinforcement block 20 can effectively increase the local strength of the cable sheath 10 at the bend area of ​​the wire core 14. This reinforcement not only significantly reduces the curvature of the wire core 14 during bending, but also effectively prevents the twisting phenomenon that may occur in the wire core 14 due to repeated bending over a long period of time, and can even avoid the problem of breakage caused by excessive bending of the wire core 14, thereby greatly extending the service life and reliability of the cable.

[0048] Furthermore, the application of the cable reinforcement block 20 takes into account the usage requirements of cables in special environments. In applications requiring frequent movement or bending, the cable reinforcement block 20 becomes particularly important. It ensures that in these dynamic environments, the cable maintains good morphological stability and signal transmission quality, preventing damage to the internal structure or signal interruption due to frequent bending.

[0049] The cable reinforcement block 20 is made of a high-strength and lightweight material, specifically, it can be glass fiber reinforced plastic or carbon fiber composite material, but is not limited to these. This material can adapt to the actual application requirements of the cable, not only providing sufficient support to ensure the stability and reliability of the cable in various operating environments, but also having a significant advantage: it does not increase the overall weight of the cable. By setting the cable reinforcement block 20 and its reasonable layout, the cable module can not only maintain good flexibility, facilitating installation and wiring, but also effectively improve the local strength of the cable sheath 10 at the bending area of ​​the core 14. This not only significantly reduces the curvature of the core 14 during bending, but also effectively prevents the core 14 from twisting due to repeated bending over a long period of time, and can even avoid the problem of breakage caused by excessive bending of the core 14, thereby greatly extending the service life and reliability of the cable.

[0050] like Figure 8 As shown, in another specific embodiment, the cable reinforcement block 20 has an extension groove 21 at one end of its inner side. This extension groove 21 has an inwardly recessed structure, primarily designed to better adapt to the special shape and space requirements of the wire core 14 in the bend area. By providing the extension groove 21, it can precisely fit into the bend area of ​​the wire core 14, allowing the cable reinforcement block 20 to tightly cover the outer portion of the bend area of ​​the wire core 14 with a larger coverage area. This significantly improves the overall protective effect of the cable reinforcement block 20 on the bend area of ​​the wire core 14, effectively preventing potential damage or wear to the wire core 14 at the bend, and further extending the cable's service life.

[0051] The extension groove 21 has a V-shaped structure, which is adapted to the bend area of ​​the wire core 14. Specifically, the bend area of ​​the wire core 14 also has a V-shaped geometry, allowing the two to fit tightly together structurally. The end of the bend area extends to the inside of the extension groove 21. It is worth noting that the bend area of ​​the wire core 14 and the extension groove 21 do not directly contact each other, but maintain a certain distance. This ensures that the cable sheath 10 can completely wrap the wire core 14 inside, thus providing effective protection.

[0052] In addition, the angle between the extension groove 21 and the turning area is either exactly the same, or the angle of the extension groove 21 is slightly larger than the angle of the turning area of ​​the wire core 14. This not only enhances the fit between the extension groove 21 and the turning area of ​​the wire core 14, but also further improves the overall protection effect.

[0053] In other specific implementation cases, the shape design of the extension groove 21 is not limited to the specific form mentioned above. It can also be flexibly designed into various different structural forms such as semi-circular and square. Regardless of the shape chosen, its core purpose and function are the same, that is, to ensure that the turning area of ​​the wire core 14 is completely wrapped inside to provide the necessary protection and support, and to ensure that the wire core 14 is not damaged or excessively worn at the turning point.

[0054] like Figure 4 , Figure 5 as well as Figure 6 As shown, the cable chain module includes multiple cable chain units, which are connected end to end and can rotate with adjacent cable chain units. Each cable chain unit includes a connecting plate 30, a left connecting part 31, a right connecting part 32, a rotating shaft 33, a fixing frame 34, a lower protective plate 35, and an upper protective plate 36.

[0055] Two connecting plates 30 are provided, and these two connecting plates 30 are symmetrically distributed in the front-to-back direction. Each connecting plate 30 is arranged vertically to ensure sufficient space inside. Inside the two connecting plates 30, a lower protective plate 35 and an upper protective plate 36 are fixedly installed, with the lower protective plate 35 and the upper protective plate 36 arranged vertically at intervals, maintaining a certain distance between them to ensure that the cable module can pass through, thereby protecting the cable module. At the same time, the lower protective plate 35 and the upper protective plate 36 are parallel to each other. The length of these two protective plates extends in the front-to-back direction. Specifically, the front end of the lower protective plate 35 is fixedly connected to the front connecting plate 30, and the rear end is also fixedly connected to the rear connecting plate 30; the front end and the rear end of the upper protective plate 36 are also firmly connected to the front and rear connecting plates 30 respectively, thereby bearing and protecting the inner cable module.

[0056] It should be noted that the surfaces of both the lower protective plate 35 and the upper protective plate 36 have been treated with anti-corrosion coating, that is, they have been sprayed with anti-corrosion coating to ensure long-term use in harsh working environments. Whether it is a humid, high-temperature or corrosive environment, they can maintain their good protective performance. This treatment method can effectively extend the service life of the protective plates.

[0057] Each connecting plate 30 consists of a left connecting portion 31 and a right connecting portion 32. A rotating shaft 33 is provided on the outer surface of the left connecting portion 31, with its axis extending in the front-to-back direction. The right connecting portion 32 has through-hole mounting holes, all circular structures precisely fitted to the rotating shaft 33, ensuring a tight fit and efficient transmission during installation. Between two adjacent cable chain units, the rotating shaft 33 on the left connecting portion 31 of the connecting plate 30 rotatably engages with the mounting hole on the right connecting portion 32 of the adjacent connecting plate 30, thus achieving rotational engagement between the two cable chain units. Multiple cable chain units are engaged in this manner, ensuring the performance and reliability of the entire cable chain module during operation. The above are all prior art and will not be elaborated further.

[0058] Each connecting plate 30 has a fixing bracket 34 on the inner side of the left connecting part 31. In this embodiment, the fixing bracket 34 is a square frame structure, that is, it has a square mounting groove on its inner side, and the shape of the mounting groove is adapted to the cable reinforcing block 20.

[0059] The cable sheath 10 passes through the inside of the connecting plate 30, and the cable reinforcement blocks 20 on the cable sheath 10 are inserted into the corresponding mounting slots. That is, the cable reinforcement blocks 20 on the front side of the cable sheath 10 are inserted into the corresponding mounting slots on the front connecting plate 30, and the cable reinforcement blocks 20 on the rear side of the cable sheath 10 are inserted into the corresponding mounting slots on the rear connecting plate 30. It is particularly important to note that in this embodiment, the front and rear cable reinforcement blocks 20 are staggered. Therefore, the way the cable reinforcement blocks 20 are fitted in the mounting slots is also the same. When a cable reinforcement block 20 is inserted into the mounting slot on the front connecting plate 30, there is no cable reinforcement block 20 in the mounting slot on the rear connecting plate 30. Similarly, when a cable reinforcement block 20 is inserted into the mounting slot on the rear connecting plate 30, there is no cable reinforcement block 20 in the mounting slot on the front connecting plate 30.

[0060] When the cable chain module bends, the cable reinforcement blocks 20 on the front and rear sides are staggered, meaning there are staggered stress points on the cable sheath 10. These stress points are supported by the fixing frame 34 and will not deform. However, the portion between the two cable reinforcement blocks 20 will bend and deform, with the deformed portion also distributed alternately front and back (e.g., ...). Figure 7 As shown in the diagram, this effectively reduces the bending curvature of the cable sheath 10 at the bend area of ​​the core 14, thereby reducing damage to this area. The reduced bending curvature directly means a decrease in mechanical stress on the bend area of ​​the core 14, effectively reducing the risk of damage to this area and extending the cable's service life.

[0061] Furthermore, it should be noted that the present invention also provides a processing technology for producing the cable module. The cable production process is a continuous production process referencing the form of a corrugated pipe. During the production process, the cable sheath 10 is horizontally divided into upper and lower parts in the width direction, and the wire core 14 in the cable sheath 10 forms a third part. The production process mainly consists of two steps. In the first step, a forming mold is used to generate one side of the cable sheath 10 and the wire core 14 together. Then, the remaining half of the cable sheath 10 is formed onto the cable sheath 10 completed in the previous step.

[0062] Specifically, the first step involves using a continuous mold to produce half of the cable sheath 10. The two molds are different. The first mold is formed based on the bending of the wire core 14 and is used to fix the wire core 14 according to the preset shape to prevent the position of the bent wire core 14 from changing during forming. The other mold is used to form the other side of the cable sheath 10 and wrap and fix the wire core 14. The second step involves feeding the half of the cable sheath 10 produced in the previous step into the second mold, which then forms the other half of the cable sheath 10.

[0063] This processing technology offers certain advantages, enabling the cable sheath 10 to be made from two different materials. Specifically, one side of the cable sheath 10 can be designed with excellent tensile strength, while the other side uses a material with superior compressive strength. In this way, when the cable sheath 10 needs to be bent during actual use, one side will primarily bear the tensile force generated by bending, while the other side will primarily bear the resulting compressive force. If the cable sheath 10 is made of a single material, uneven stress during long-term use often leads to one side breaking before the other, thus affecting the overall service life of the cable sheath 10. By using two materials with different properties, the unique advantages of each material can be fully utilized, allowing each part of the cable sheath 10 to perform its specific function under different types of stress, effectively distributing and balancing the force, thereby significantly extending the overall service life of the cable sheath 10 and improving its durability.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A bend-resistant cable, comprising: The cable sheath is characterized in that it contains a continuous zigzag-shaped wire core, which has multiple alternating first and second bends connected end to end. A turning area is formed at the corner between the first and second bends. Multiple rigid cable reinforcing blocks are provided on both the front and rear sides of the cable sheath. The cable reinforcing blocks are spaced apart along the length of the cable sheath and are embedded in the interior of the cable sheath. The cable reinforcing blocks in the front and rear directions correspond one-to-one with the turning areas of the wire core.

2. The bend-resistant cable according to claim 1, characterized in that, The cable sheath is also provided with a cable chain module. The cable chain module includes multiple cable chain units. The cable chain units are connected end to end, and two adjacent cable chain units are rotatably connected. Each cable chain unit includes two connecting plates symmetrically distributed front and back. A lower protective plate and an upper protective plate are fixedly installed on the inner side of the two connecting plates. The lower protective plate and the upper protective plate are arranged at intervals in the vertical direction. The connecting plates between two adjacent cable chain units are rotatably connected, and the inner side of the connecting plates is provided with a fixing bracket adapted to the cable reinforcement block.

3. The bend-resistant cable according to claim 2, characterized in that, Each connecting plate includes a left connecting part and a right connecting part. A rotating shaft is provided on the outer side of the left connecting part. The axis of the rotating shaft extends in the front-back direction. A through mounting hole is provided on the left connecting part. The mounting hole is a circular structure adapted to the rotating shaft. Between two adjacent cable chain units, the rotating shaft on the left connecting part of the connecting plate is rotatably fitted into the mounting hole on the right connecting part of the adjacent connecting plate.

4. The bend-resistant cable according to claim 1, characterized in that, The cable reinforcement block has an extension groove at one end on the inner side. The extension groove is a V-shaped structure that is recessed inward, and the turning area extends to the inner side of the extension groove.

5. A bend-resistant cable according to any one of claims 1-4, characterized in that, The cable reinforcement block is made of glass fiber reinforced plastic or carbon fiber composite material.

6. A bend-resistant cable according to claim 5, characterized in that, The cable sheath is made of polyurethane or thermoplastic polyester elastomer.

7. A bend-resistant cable according to claim 6, characterized in that, The cable sheath has a core arrangement groove inside, which is a zigzag structure adapted to the core.

8. A bend-resistant cable according to claim 1, characterized in that, The included angle of the turning area on the wire core is 60 degrees.

9. A bend-resistant cable according to claim 1, characterized in that, The outer side of the wire core is also wrapped with an insulation layer or a shielding layer.

10. A bend-resistant cable according to claim 2, characterized in that, The lower and upper protective plates are coated with an anti-corrosion coating.

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