Composite cable for robot system

Abstract

The utility model discloses a composite cable for a robot system, which comprises electric power units and control units, a plurality of electric power units and a plurality of control units are twisted to form a second cable core, gaps of the second cable core are filled with polypropylene fiber ropes, and a second polyester belt is lapped outside the cable core in a Z direction in an overlapping manner. A second shielding layer is lapped outside the second polyester tape in a double-layer gap manner; the second shielding layer is wrapped by a third polyester tape in an S-direction overlapping manner, and the third polyester tape is wrapped by a polyarylether ether nitrile outer sheath in an extruded manner. The cable provided by the utility model is excellent in flexibility, torsion resistance, tensile strength, bending resistance, wear resistance and electromagnetic shielding resistance, and is small in installation occupation space and low in installation strength.

Description

Technical Field

[0001] This utility model relates to the field of power cables, specifically to a composite cable for robot systems. Background Technology

[0002] In recent years, the rapid development of artificial intelligence algorithms, sensor technology, and computing power has enabled robots to possess stronger learning and decision-making capabilities, higher precision, and faster processing speeds. Robot applications are becoming increasingly widespread in industries and service sectors. As the core carrier for the precision motion control of robots, robot system cables are ushering in multi-dimensional opportunities for innovative development. Due to the special operating conditions of these cables, they are required to possess excellent flexibility, torsion resistance, tensile strength, bending resistance, wear resistance, and electromagnetic shielding properties, which existing cables cannot meet. To ensure the long-term stable operation of robots, while considering the limited installation space, it is necessary to develop a composite cable for robot systems that integrates the power unit and control unit. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a composite cable for robot systems. This cable has excellent flexibility, torsion resistance, tensile strength, bending resistance, wear resistance and electromagnetic shielding performance, while occupying little installation space and having low installation strength.

[0004] To achieve the above objectives, this utility model provides a composite cable for a robot system, comprising a power unit and a control unit. Multiple power units and multiple control units are twisted together to form a second cable core. Polypropylene fiber ropes are filled in the gaps of the second cable core. A second polyester tape is wrapped around the cable core in a Z-direction overlapping manner, with an overlap rate of 30-50%. A second shielding layer is wrapped around the second polyester tape in a double-layer gap, with the single-layer wrapping pitch controlled at 1-2 cm. A third polyester tape is wrapped around the second shielding layer in an S-direction overlapping manner, with an overlap rate of 20-30%. A polyarylether ether nitrile outer sheath is extruded over the third polyester tape.

[0005] Furthermore, the power unit includes a first conductor, a polyimide film strip wrapped around the first conductor, and a first thermoplastic polyurethane elastomer insulation layer extruded over the polyimide film strip.

[0006] Furthermore, the first conductor is formed by twisting multiple silver-plated copper wires with a diameter of 0.15 mm into strands and then winding them around a conductive silicone coated with graphene.

[0007] Furthermore, the outer diameter of the conductive silicone coated with graphene is the same as the outer diameter of the stranded silver-plated copper wire bundle.

[0008] Furthermore, the control unit includes a control wire core, two control wire cores are twisted together to form a first cable core, a PTFE film tape is wrapped around the first cable core in an S-direction overlap with an overlap rate of 50%, a first shielding layer is woven around the PTFE film tape with a weaving density of 85%, and a first polyester tape is wrapped around the first shielding layer in a Z-direction overlap with an overlap rate of 50%.

[0009] Furthermore, the control wire core includes a second conductor, and a second thermoplastic polyurethane elastomer insulation layer is extruded over the second conductor.

[0010] Furthermore, the second conductor is made of nickel-plated copper wire with a diameter of 0.15 mm twisted together with semi-conductive ultra-high molecular weight polyethylene fiber bundles.

[0011] Furthermore, the first shielding layer is woven from a mixture of tin-plated copper wire and Kevlar fiber.

[0012] Furthermore, the second shielding layer is formed by wrapping two layers of tin-plated copper strip with gaps.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The Z-axis overlapping wrapping of the second polyester tape around the cable core improves the cable's mechanical strength, making it more stable under external pressure or tension, and less prone to deformation or damage. It also helps disperse and absorb external impact energy, thus protecting the internal cable structure. The Z-axis wrapping also provides better shielding against electromagnetic interference, enhancing the cable's anti-interference capability. Meanwhile, the S-axis overlapping wrapping of the third polyester tape creates a better seal, effectively preventing moisture intrusion and improving the cable's waterproof performance. This allows it to better resist the effects of external environmental factors, such as ultraviolet radiation and temperature changes, thereby extending the cable's service life. By combining these two wrapping methods, the overall performance of the cable can be comprehensively improved in terms of mechanical strength, impact resistance, electrical performance, waterproof performance, and weather resistance.

[0015] 2. In this utility model, the first conductor is made of silver-plated copper wire bundles with a diameter of 0.15mm, twisted into strands and wound around conductive silicone coated with graphene. The finer the copper wire, the better the flexibility of the cable and the higher the tensile strength of the copper single wire, thus enhancing the flexibility and tensile performance of the cable. The copper wire bundles are twisted into strands and wound around conductive silicone coated with graphene, which avoids the relative friction between the strands after the cable is bent and twisted, thus enhancing the wear resistance and torsion resistance of the conductor. At the same time, graphene improves the conductivity of the conductive silicone, and the silver-plated copper wire enhances the corrosion resistance of the conductor and further enhances the conductivity of the conductor.

[0016] 3. The second conductor is made of nickel-plated copper wire with a diameter of 0.15mm and semi-conductive ultra-high molecular weight polyethylene fiber stranded together. The nickel-plated copper wire enhances the conductor's corrosion resistance, wear resistance, and oxidation resistance. The semi-conductive ultra-high molecular weight polyethylene fiber has high specific strength (more than ten times that of steel wire of the same cross-section), high specific modulus (second only to super-grade carbon fiber), light weight, high tensile strength, chemical corrosion resistance, wear resistance, and long flexural life, which can effectively enhance the conductor's torsion resistance, tensile strength, bending resistance, and wear resistance.

[0017] 4. The first conductor is wrapped with a polyimide film tape, which has excellent temperature resistance, electrical insulation properties and radiation resistance. In addition, the polyimide film tape not only makes the conductor more tightly wrapped, but also prevents the conductor monofilament burrs from affecting the insulation layer.

[0018] 5. The first cable core is covered with a PTFE film tape, which has high and low temperature resistance, corrosion resistance, low friction, low wear, moisture resistance, high insulation performance, good flexibility, good shielding performance, high communication frequency with low attenuation, and small coefficient of thermal expansion. In addition, the PTFE film tape can prevent the copper wire burrs of the first shielding layer from affecting the second insulation layer.

[0019] 6. The first shielding layer is woven from a mixture of tin-plated copper wire and Kevlar fiber. Kevlar fiber has high strength, high wear resistance, high tear resistance and acid and alkali corrosion resistance, which effectively enhances the torsion resistance, tensile strength, bending resistance and wear resistance of the shielding layer and the cable.

[0020] 7. The second shielding layer is wrapped with tin-plated copper tape in a double-layer gap. The double-layer gap wrapping can improve the bending performance of the cable. Combined with the first shielding layer, it effectively enhances the electromagnetic shielding performance of the cable.

[0021] 8. The outer sheath is made of polyarylether ether nitrile material extruded, which is resistant to high temperature and can be used under pressure at 230℃ for a long time. It also has high strength, high modulus, high fracture toughness, excellent dimensional stability, bending resistance, chemical corrosion resistance, and radiation resistance. In addition, it has outstanding resistance to sliding wear and fretting wear, stable insulation performance, and hydrolysis resistance. It can effectively enhance the cable's torsion resistance, tensile strength, bending resistance, and wear resistance, and improve the cable's service life.

[0022] 9. The power unit and control unit of this utility model are integrated into one unit, which can effectively save the installation space of the cable and reduce the installation difficulty. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0025] like Figure 1 As shown, this utility model provides a composite cable for a robot system, including a power unit and a control unit. Multiple power units and multiple control units are twisted into a second cable core. Polypropylene fiber ropes 10 are filled in the gaps of the second cable core. A second polyester tape 11 is wrapped around the cable core in a Z-direction overlap, with an overlap rate of 30-50%. A second shielding layer 12 is wrapped around the second polyester tape in a double-layer gap, with a single-layer wrapping pitch controlled at 1-2 cm. A third polyester tape 13 is wrapped around the second shielding layer in an S-direction overlap, with an overlap rate of 20-30%. A polyarylene ether nitrile outer sheath 14 is extruded over the third polyester tape. This cable has high temperature resistance, can be used under pressure at 230℃ for a long time, and has high strength, high modulus, high fracture toughness, excellent dimensional stability, bending resistance, chemical corrosion resistance, and radiation resistance. It also has outstanding resistance to sliding wear and fretting wear, stable insulation performance, and hydrolysis resistance, which can effectively enhance the cable's torsion resistance, tensile strength, bending resistance, and wear resistance, and improve the cable's service life.

[0026] The Z-axis overlapping wrapping of the second polyester tape around the cable core enhances the cable's mechanical strength, making it more stable and less prone to deformation or damage under external pressure or tension. It also helps disperse and absorb external impact energy, protecting the internal cable structure. The Z-axis wrapping also provides better shielding against electromagnetic interference, improving the cable's anti-interference capabilities. Meanwhile, the S-axis overlapping wrapping of the third polyester tape creates a better seal, effectively preventing moisture intrusion and improving the cable's waterproof performance. This allows it to better resist the effects of external environmental factors such as ultraviolet radiation and temperature changes, thus extending the cable's service life. Combining these two wrapping methods comprehensively improves the cable's overall performance in terms of mechanical strength, impact resistance, electrical performance, waterproof performance, and weather resistance.

[0027] In this embodiment, the power unit includes a first conductor, and a polyimide film tape 3 is wrapped around the first conductor, which gives the power unit excellent temperature resistance, electrical insulation performance and radiation resistance. In addition, wrapping the conductor with the polyimide film tape not only makes the conductor more tightly wrapped, but also prevents the conductor monofilament burrs from affecting the insulation layer. A first thermoplastic polyurethane elastomer insulation layer 4 is extruded over the polyimide film tape.

[0028] In this embodiment, the first conductor is formed by twisting multiple silver-plated copper wires with a diameter of 0.15mm into strands 2 and then winding them around a conductive silicone 1 coated with graphene. The finer the copper wires, the better the flexibility of the cable, and the higher the tensile strength of the copper single wires, thus enhancing the flexibility and tensile strength of the cable. The copper wires are twisted into strands and then wound around the conductive silicone coated with graphene, which avoids the relative friction between the strands after the cable is bent and twisted, thus enhancing the wear resistance and torsion resistance of the conductor. At the same time, graphene improves the conductivity of the conductive silicone, and the silver-plated copper wires enhance the corrosion resistance of the conductor and further enhance the conductivity of the conductor.

[0029] In this embodiment, the control unit includes a control wire core, two control wire cores are twisted together to form a first cable core, a PTFE film tape 7 is wrapped around the first cable core in an S-direction overlap, the overlap rate is 50%, a first shielding layer 8 is woven around the PTFE film tape with a weaving density of 85%, and a first polyester tape 9 is wrapped around the first shielding layer in a Z-direction overlap, the overlap rate is 50%.

[0030] The control core includes a second conductor 5, with a second thermoplastic polyurethane elastomer insulation layer 6 extruded over the second conductor. The second conductor is made of nickel-plated copper wire with a diameter of 0.15mm and semi-conductive ultra-high molecular weight polyethylene fiber bundles. The finer the copper wire, the better the flexibility of the cable, and the higher the tensile strength of the copper single wire, which enhances the flexibility and tensile strength of the cable. The nickel-plated copper wire enhances the conductor's corrosion resistance, wear resistance, and oxidation resistance. The semi-conductive ultra-high molecular weight polyethylene fiber has high specific strength (more than ten times that of steel wire of the same cross-section), high specific modulus (second only to super-grade carbon fiber), light weight, high tensile strength, chemical corrosion resistance, wear resistance, and long flexural life, which can effectively enhance the conductor's torsion resistance, tensile strength, bending resistance, and wear resistance.

[0031] In this embodiment, the first shielding layer is woven from a mixture of tin-plated copper wire and Kevlar fiber. This structure has high strength, high wear resistance, high tear resistance and acid and alkali corrosion resistance, effectively enhancing the torsion resistance, tensile strength, bending resistance and wear resistance of the shielding layer and the cable.

[0032] In this embodiment, the second shielding layer is made of double-layer gap wrapping of tin-plated copper strip, with the wrapping gap not exceeding 50% of the bandwidth. The double-layer gap wrapping can improve the bending performance of the cable, and together with the first shielding layer, it effectively enhances the electromagnetic shielding performance of the cable.

[0033] In summary, through the above design, this utility model simultaneously possesses excellent flexibility, torsion resistance, tensile strength, bending resistance, wear resistance, and electromagnetic shielding performance, greatly improving the service life of the cable. The integrated power unit and control unit can effectively save cable installation space and reduce installation difficulty.

[0034] There are many specific applications of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of this utility model, and these improvements should also be considered within the protection scope of this utility model.

Claims

1. A composite cable for a robotic system, characterized by: The power unit and the control unit are twisted into a second cable core, polypropylene fiber ropes are filled in the gaps of the second cable core, a second polyester tape is overlapped and wrapped in the Z direction outside the cable core, and the overlapping wrapping rate is 30-50%; a second shielding layer is wrapped in the double-layer gaps outside the second polyester tape; a third polyester tape is overlapped and wrapped in the S direction outside the second shielding layer, and the overlapping wrapping rate is 20-30%; and a polyarylene ether nitrile outer sheath is extruded and wrapped outside the third polyester tape.

2. A composite cable for a robot system according to claim 1, characterized in that: The power unit comprises a first conductor, a polyimide film tape is wrapped outside the first conductor, and a first thermoplastic polyurethane elastomer insulation layer is extruded and wrapped outside the polyimide film tape.

3. A composite cable for a robotic system according to claim 2, wherein: The first conductor is formed by twisting a plurality of silver-plated copper wire bundles with a diameter of 0.15 mm into a strand and then winding the strand on a conductive silica gel coated with graphene.

4. A composite cable for a robot system according to claim 3, characterized in that: The conductive silica gel coated with graphene has the same outer diameter as the strand of the silver-plated copper wire bundles.

5. The composite cable for a robot system according to claim 1, characterized by: The control unit comprises a control wire core, two control wire cores are twisted into a first cable core, a PTFE four-fluorine film tape is overlapped and wrapped in the S direction outside the first cable core, and the overlapping wrapping rate is 50%, a first shielding layer is woven outside the PTFE four-fluorine film tape, the weaving density is 85%, a first polyester tape is overlapped and wrapped in the Z direction outside the first shielding layer, and the overlapping wrapping rate is 50%.

6. A composite cable for a robotic system according to claim 5, wherein: The control wire core comprises a second conductor, and a second thermoplastic polyurethane elastomer insulation layer is extruded and wrapped outside the second conductor.

7. A composite cable for a robot system according to claim 6, characterized in that: The second conductor is twisted by a nickel-plated copper wire with a diameter of 0.15 mm and a semi-conductive ultrahigh molecular weight polyethylene fiber bundle.

8. A composite cable for a robotic system according to claim 5, wherein: The first shielding layer is woven by mixing a tinned copper wire and Kevlar fiber.

9. The composite cable for a robot system according to claim 1, characterized by: The second shielding layer is wrapped by a tinned copper tape in double-layer gaps, and the wrapping gap is not greater than 50% of the width of the tape.

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