Highly flexible torsion-resistant robot cable

Abstract

The utility model relates to high flexible anti -twist robot cable, including a plurality of inner core and filling layer, a plurality of the inner core evenly distributes in the axial inside inner core, fills a plurality of carbon fiber material strips in filling layer, and the inner core includes conductor, and the inside of conductor is equipped with first fiber reinforced core along the axial direction, and the outside of conductor is equipped with insulating layer, and the inside of insulating layer evenly distributes helical elastic support strip, and the outside of insulating layer is equipped with shielding layer, and the outside of shielding layer is equipped with buffer layer, and the inside of buffer layer evenly distributes a plurality of hollow rubber cylinders along the circumferential direction. The rubber elastic support strip of helical in the insulating layer and the outer sheath layer of polyurethane elastomer material give the cable excellent flexibility. In the complex movement of robot, the cable can easily realize multi -angle, large -scale bending and torsion, and will not appear broken or damage, ensures the normal use of cable under various complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a highly flexible, torsion-resistant robot cable. Background Technology

[0002] Against the backdrop of the booming development of modern industry and technology, the application scenarios of robots are becoming increasingly widespread. From precision electronics manufacturing and high-intensity automobile production to flexible logistics sorting and complex medical assistance operations, robots play a crucial role. During the operation of robots, cables, as important components connecting their various parts and transmitting power and signals, face severe challenges.

[0003] Conventional robot cables are highly susceptible to problems such as internal conductor breakage and insulation damage during complex movements involving frequent twisting and bending. For example, when industrial robotic arms perform high-speed and frequent twisting movements, the internal conductors may break due to repeated stress fatigue, leading to power transmission interruptions, reduced cable lifespan, and severely restricting the efficient and stable operation of the robot. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a highly flexible, torsion-resistant robot cable. The specific technical solution is as follows:

[0005] A highly flexible, anti-torsion robot cable includes multiple inner cores and a filling layer. The multiple inner cores are evenly distributed axially inside the inner cores. The filling layer is filled with multiple carbon fiber strips. Each inner core includes a conductor. The conductor has a first fiber reinforcing core arranged axially inside. The conductor has an insulation layer on its outer side. The insulation layer has helical elastic support strips evenly distributed inside. The insulation layer has a shielding layer on its outer side. The shielding layer has a buffer layer on its outer side. The buffer layer has multiple hollow rubber cylinders evenly distributed circumferentially inside.

[0006] As an improvement to the above technical solution: an outer sheath layer is provided on the outside of the filling layer. The outer sheath layer is a polyurethane elastomer material layer, and the outer surface is provided with anti-slip texture. Multiple glass fiber material reinforcing ribs are provided axially inside the outer sheath layer.

[0007] As an improvement to the above technical solution: the conductor is further provided with multiple second fiber reinforcing cores along the axial direction inside, the first fiber reinforcing core is located at the axial center of the conductor, and multiple second fiber reinforcing cores are evenly distributed around the first fiber reinforcing core. Both the first and second fiber reinforcing cores are aramid fiber cores, and the conductor is made of ultra-fine silver-plated copper wire.

[0008] As an improvement to the above technical solution: the shielding layer includes an aluminum foil shielding layer and a tinned copper wire braided shielding layer. The aluminum foil shielding layer covers the outer surface of the insulating layer, and the tinned copper wire braided shielding layer covers the outer surface of the aluminum foil shielding layer. A spiral metal spring wire is added between the aluminum foil shielding layer and the tinned copper wire braided shielding layer.

[0009] As an improvement to the above technical solution, the elastic support strip is made of rubber material.

[0010] The beneficial effects of this utility model are:

[0011] 1. This application endows the cable with excellent flexibility through the spiral rubber elastic support strip inside the insulation layer and the outer sheath of polyurethane elastomer material. During the complex movements of the robot, the cable can easily achieve multi-angle and large-amplitude bending and twisting without breaking or being damaged, ensuring the normal use of the cable under various complex working conditions.

[0012] 2. This application utilizes the aramid fiber reinforcing core inside the conductor, the hollow rubber cylinder in the buffer layer, and the carbon fiber strips in the filler layer to form a highly efficient anti-torsion system. Even under large torque conditions, the cable can maintain its structural integrity, effectively avoiding internal structural damage caused by torsion and ensuring stable power and signal transmission.

[0013] 3. This application utilizes a multi-layered shielding structure comprised of an aluminum foil shielding layer, a tinned copper wire braided shielding layer, and a spiral metal spring wire between the two, to comprehensively shield against external electromagnetic interference. Both low-frequency and high-frequency electromagnetic interference can be effectively blocked, ensuring the accuracy and stability of signal transmission within the cable and meeting the stringent requirements of robots for high reliability in signal transmission.

[0014] 4. This application utilizes the polyurethane elastomer material and anti-slip texture of the outer sheath to provide excellent wear resistance, while the internal glass fiber reinforcement greatly enhances tensile and compressive strength. These characteristics make the outer sheath less prone to wear and cracking during long-term use, effectively extending the cable's service life, reducing maintenance costs, minimizing robot downtime due to cable faults, and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall internal structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the core in this utility model.

[0017] Reference numerals: 1. Inner core; 11. Conductor; 111. First fiber-reinforced core; 112. Second fiber-reinforced core; 12. Insulation layer; 121. Elastic support strip; 131. Aluminum foil shielding layer; 132. Tinned copper wire braided shielding layer; 14. Buffer layer; 141. Rubber cylinder; 2. Filling layer; 3. Outer sheath layer; 4. Carbon fiber strip. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Example

[0020] Please refer to Figures 1-2 The high-flexibility, anti-torsion robot cable provided by this utility model mainly consists of multiple inner cores 1, a filling layer 2, an outer sheath layer 3, and special reinforcement and shielding structures. These structures work together to achieve the cable's high flexibility, strong anti-torsion, good shielding, and excellent mechanical properties.

[0021] Specifically, the inner core 1 is the main part of the cable of this application, and multiple inner cores 1 are evenly distributed axially inside the filling layer 2. Each inner core 1 includes a conductor 11, and a first fiber reinforcing core 111 is provided axially inside the conductor 11, which is located at the axial center inside the conductor 11 and plays a key role in stabilizing support and enhancing torsional resistance. An insulation layer 12 is provided on the outside of the conductor 11, and spiral elastic support strips 121 are evenly distributed inside the insulation layer 12. These elastic support strips 121 provide elastic support for the insulation layer 12, ensuring that the insulation layer 12 can maintain good structural stability when the cable is bent and twisted, and avoiding short circuits between conductors 11. A shielding layer is provided on the outside of the insulation layer 12 to resist external electromagnetic interference and ensure stable signal transmission.

[0022] A buffer layer is provided on the outside of the shielding layer. Inside the buffer layer, multiple hollow rubber cylinders 141 are evenly distributed along the circumference. They play a role in buffering and dispersing stress when the cable is subjected to external force, effectively protecting the internal structure.

[0023] The filler layer 2 is filled with multiple carbon fiber strips. These carbon fiber strips possess high strength and low density, enhancing the overall torsional resistance of the cable while reducing its weight. The filler layer 2 not only fills the gaps between the inner cores 1, making the cable structure more compact, but also provides cushioning and protection to some extent for the inner cores 1.

[0024] Furthermore, an outer sheath layer 3 is provided on the outside of the filler layer 2, and the outer sheath layer 3 is made of polyurethane elastomer material. This material has good flexibility, wear resistance, and chemical corrosion resistance. The outer surface of the outer sheath layer 3 has anti-slip texture, which increases the friction between the cable and external objects, prevents slippage during use, and improves the safety of cable use.

[0025] In addition, multiple glass fiber reinforcing ribs are provided along the axial direction inside the outer sheath layer 3. The glass fiber reinforcing ribs significantly enhance the overall strength of the outer sheath layer 3, giving it stronger tensile and compressive resistance, and effectively protecting the internal structure of the cable from external mechanical damage.

[0026] The conductor 11 also has multiple second fiber reinforcing cores 112 arranged axially inside, which are evenly distributed around the first fiber reinforcing core 111. Both the first and second fiber reinforcing cores 111 and 112 are aramid fiber cores, which possess ultra-high strength, high modulus, and good chemical and heat resistance. Combined with the conductor 11 made of ultra-fine silver-plated copper wire, they greatly improve the tensile and torsional properties of the conductor 11, while the excellent conductivity of the ultra-fine silver-plated copper wire ensures efficient transmission of electricity and signals.

[0027] The shielding layer comprises an aluminum foil shielding layer 131 and a tinned copper wire braided shielding layer. The aluminum foil shielding layer 131 tightly wraps around the outer surface of the insulation layer 12, effectively shielding against low-frequency electromagnetic interference. The tinned copper wire braided shielding layer, wrapped around the outer surface of the aluminum foil shielding layer 131, provides excellent shielding against high-frequency electromagnetic interference. A spiral metal spring wire is added between the aluminum foil shielding layer 131 and the tinned copper wire braided shielding layer. This metal spring wire not only enhances the flexibility of the shielding layer, allowing it to better adapt to deformation when the cable twists, but also further improves the torsional resistance of the shielding layer, preventing damage due to torsion and ensuring the stability of the shielding effect.

[0028] The elastic support strip 121 is made of rubber material, which has excellent elasticity and resilience. It can provide continuous and stable support force for the insulation layer 12 during cable bending and torsion, maintain the shape and structural integrity of the insulation layer 12, and effectively prevent the insulation layer 12 from deforming or breaking due to uneven force, thereby ensuring the insulation performance between conductors 11.

[0029] Specifically, in the fabrication of the inner core 1 of this application, firstly, high-quality ultra-fine silver-plated copper wire is selected and stranded to form a conductor 11. During the fabrication of the conductor 11, the first fiber reinforcing core 111 is accurately placed at the axial center of the conductor 11. Existing winding equipment can be used to uniformly wind multiple second fiber reinforcing cores 112 around the periphery of the first fiber reinforcing core 111.

[0030] Then, an insulation layer 12 is applied to the outside of the conductor 11 using an extrusion process. During the extrusion process, using existing specialized molds and equipment, an elastic support strip 121 made of rubber material is uniformly embedded into the insulation layer 12 in a spiral shape. Next, an aluminum foil shielding layer 131, a spiral metal spring wire, and a tin-plated copper wire braided shielding layer are sequentially applied to the outside of the insulation layer 12.

[0031] The aluminum foil shielding layer 131 is made using a longitudinal wrapping process to ensure a tight fit to the surface of the insulation layer 12. Spiral metal spring wires are evenly wound onto the aluminum foil shielding layer 131 using modern winding equipment. The tin-plated copper wire braided shielding layer is woven using a braiding machine to ensure braiding density and uniformity. Finally, a buffer layer is set on the outside of the shielding layer, and multiple hollow rubber cylinders 141 are evenly distributed circumferentially inside the buffer layer using an injection molding process.

[0032] When fabricating the filling layer 2, carbon fiber strips are first evenly filled into the filling layer 2 according to a certain arrangement to ensure uniform and dense filling, so as to give full play to the role of carbon fiber strips in enhancing torsional resistance. Then, multiple fabricated inner cores 1 are evenly distributed in the axial direction inside the filling layer 2 according to design requirements to ensure that the spacing between the inner cores 1 is consistent and the structure is stable.

[0033] In the fabrication of the outer sheath layer 3, polyurethane elastomer material is first extruded and formed using an extruder. During the extrusion process, an anti-slip texture is machined onto the outer surface of the outer sheath layer 3 using a dedicated die. Simultaneously, at specific locations on the extruder, fiberglass reinforcing ribs are evenly inserted axially into the outer sheath layer 3. During insertion, it is crucial to ensure the reinforcing ribs are evenly distributed and free from defects such as breakage or twisting, to guarantee the strength and performance of the outer sheath layer 3. Finally, the fabricated outer sheath layer 3 is tightly wrapped around the outside of the filler layer 2, completing the overall cable fabrication.

[0034] Specifically, multiple inner cores 1 are evenly distributed axially within the filling layer 2. The inner cores 1 and the filling layer 2 are tightly fitted together. The filling layer 2 not only fills the gaps between the inner cores 1 but also provides support and protection for them. The carbon fiber strips in the filling layer 2 work together with the inner cores 1 to enhance the cable's torsional resistance.

[0035] Inside conductor 11, the first fiber reinforcing core 111 is located at the axial center, and the second fiber reinforcing core 112 is evenly distributed around it. They are tightly bonded to ultra-fine silver-plated copper wires and formed into a whole through stranding and other processes. Insulation layer 12 tightly covers the outside of conductor 11. Elastic support strips 121 inside insulation layer 12 are tightly connected to the insulation layer 12 material, providing elastic support for insulation layer 12. In shielding layer, aluminum foil shielding layer 131 tightly covers the outer surface of insulation layer 12, tin-plated copper wire braided shielding layer covers the outer surface of aluminum foil shielding layer 131, and spiral metal spring wire is wound between aluminum foil shielding layer 131 and tin-plated copper wire braided shielding layer. The layers are tightly bonded and work together to provide shielding. Buffer layer covers the outside of shielding layer. Hollow rubber cylinders 141 inside buffer layer are tightly bonded to buffer layer material and evenly distributed inside buffer layer, playing a role in buffering and dispersing stress.

[0036] The outer sheath layer 3 tightly covers the outside of the filler layer 2, and the two are connected together by a certain bonding process or mechanical bonding method. The glass fiber reinforcing ribs inside the outer sheath layer 3 are distributed axially and are tightly bonded to the outer sheath layer 3 material, enhancing the strength of the outer sheath layer 3 and also reinforcing the connection between the outer sheath layer 3 and the filler layer 2. The anti-slip texture on the outer surface of the outer sheath layer 3 is directly formed on the surface of the outer sheath layer 3 during the manufacturing process, becoming an integral part of the outer sheath layer 3 material.

[0037] Specifically, during robot operation, when the cable is subjected to torsional force, the aramid fiber reinforcing core (first fiber reinforcing core 111 and second fiber reinforcing core 112) inside conductor 11, with its high strength and high modulus, bears most of the torsional stress, effectively preventing conductor 11 from breaking. The hollow rubber cylinder 141 in the buffer layer undergoes elastic deformation, dispersing the torsional stress and preventing stress concentration from damaging the internal structure of the cable. The carbon fiber strips in the filling layer 2 further enhance the overall torsional resistance of the cable, working in conjunction with the inner core 1 and the buffer layer to ensure that the cable maintains structural stability during torsion.

[0038] When the cable is bent, the rubber elastic support strip 121 inside the insulation layer 12 undergoes elastic deformation, providing continuous support force to the insulation layer 12, enabling the insulation layer 12 to adapt to bending deformation, maintain good insulation performance, and prevent short circuits between conductors 11.

[0039] During signal transmission, the aluminum foil shielding layer 131 shields against low-frequency electromagnetic interference, the tinned copper wire braided shielding layer shields against high-frequency electromagnetic interference, and the spiral metal spring wire enhances the flexibility and torsional resistance of the shielding layer while further improving the shielding effect, ensuring that the internal signal transmission of the cable is not affected by external electromagnetic interference, and guaranteeing the accuracy and stability of signal transmission.

[0040] The polyurethane elastomer material and anti-slip texture of the outer sheath layer 3, along with the internal glass fiber reinforcement, give the cable excellent wear resistance, tensile strength, and compression resistance during use. The anti-slip texture increases the friction between the cable and external objects, preventing slippage; the glass fiber reinforcement enhances the strength of the outer sheath layer 3, protecting the internal structure of the cable from external mechanical damage, thus ensuring stable operation of the cable in complex operating environments.

[0041] 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. A highly flexible, anti-torsion robot cable, characterized in that, It includes multiple inner cores (1) and a filling layer (2). The multiple inner cores (1) are evenly distributed along the axial direction inside the inner cores (1). The filling layer (2) is filled with multiple carbon fiber strips (4). The inner core (1) includes a conductor (11). The conductor (11) has a first fiber reinforcing core (111) arranged along the axial direction inside. The conductor (11) has an insulating layer (12) on the outside. The insulating layer (12) has spiral elastic support strips (121) evenly distributed inside. The insulating layer (12) has a shielding layer on the outside. The shielding layer has a buffer layer (14) on the outside. The buffer layer (14) has multiple hollow rubber cylinders (141) evenly distributed along the circumferential direction inside.

2. The highly flexible anti-torsion robot cable according to claim 1, characterized in that: The outer side of the filling layer (2) is provided with an outer sheath layer (3), which is a polyurethane elastomer material layer and has an anti-slip texture on its outer surface. Multiple glass fiber material reinforcing ribs are provided along the axial direction inside the outer sheath layer (3).

3. The highly flexible anti-torsion robot cable according to claim 1, characterized in that: The conductor (11) is further provided with multiple second fiber reinforcing cores (112) along the axial direction inside. The first fiber reinforcing core (111) is located at the axial center inside the conductor (11). Multiple second fiber reinforcing cores (112) are evenly distributed around the first fiber reinforcing core (111). Both the first fiber reinforcing core (111) and the second fiber reinforcing core (112) are aramid fiber cores. The conductor (11) is made of ultra-fine silver-plated copper wire.

4. The highly flexible anti-torsion robot cable according to claim 1, characterized in that: The shielding layer includes an aluminum foil shielding layer (131) and a tinned copper wire braided shielding layer (132). The aluminum foil shielding layer (131) covers the outer surface of the insulating layer (12), and the tinned copper wire braided shielding layer (132) covers the outer surface of the aluminum foil shielding layer (131). A spiral metal spring wire is added between the aluminum foil shielding layer (131) and the tinned copper wire braided shielding layer (132).

5. The highly flexible anti-torsion robot cable according to claim 1, characterized in that: The elastic support strip (121) is made of rubber material.

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