High-flexibility anti-torsion cable for industrial robot

Abstract

The utility model discloses a high-flexibility anti-torsion cable for an industrial robot. The servo band-type brake cable is located in the center of the cable, the number of the power cables and the number of the signal cables are multiple, the power cables and the signal cables are alternately arranged in the circumferential direction of the periphery of the servo band-type brake cable with the servo band-type brake cable as the center, and one power cable is arranged between every two adjacent signal cables; the ground wire is located in a gap between the power cable and the signal cable, the periphery of a whole formed by the power cable, the signal cable and the ground wire is wrapped by the total shielding layer, and the PUR polyurethane sheath is wrapped outside the total shielding layer. The high-flexibility torsion-resistant cable is ingenious in structural design, the high-flexibility torsion-resistant cable can protect the structural stability, has higher tensile strength and superior bending modulus and provides reliable tensile performance, and the power cable, the servo band-type brake cable and the signal cable in the cable adopt reasonable structural design, so that the outer diameter of the cable is reduced, the installation space is increased, and the service life of the cable is prolonged. And meanwhile, the torsion resistance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, in particular to a highly flexible anti-torsion cable for industrial robots. Background Art

[0002] Industrial robots are the most representative mechatronic digital equipment. With their high efficiency and low cost, they have been applied in a growing number of fields as a supporting technology for advanced manufacturing and an emerging industry in the information society. Within the manufacturing industry, particularly in the automotive and new energy sectors, industrial robots are widely used. For example, robots have gradually replaced manual labor in operations such as welding, machining, assembly, surface coating, inspection, and warehouse palletizing, significantly improving production efficiency and reducing costs.

[0003] With the global trend toward intelligent industrial production, industrial robots are gradually evolving from modular to complex and multifunctional. As carriers of power and data signals, industrial robot cables must also meet higher standards for resistance to bending, torsion, and movement. Existing industrial robot cables have significant deficiencies in insulation, inner sheath flexibility and abrasion resistance, outer sheath durability, and overall performance. In particular, they lack the ability to adapt to complex motion trajectories, resist fatigue, and resist interference. Utility Model Content

[0004] In order to solve the problems existing in the background technology, the utility model provides a highly flexible anti-torsion cable for an industrial robot.

[0005] The technical solution adopted in this utility model is:

[0006] The utility model includes a power cable, a servo brake cable, a signal cable, a total shielding layer, a PUR polyurethane sheath and a ground wire; the servo brake cable is located at the center of the cable, and a plurality of power cables and signal cables are provided, and the plurality of power cables and the plurality of signal cables are arranged around the servo brake cable as the center, and the power cables and the signal cables are alternately arranged along the circumference around the servo brake cable, and a power cable is provided between every two adjacent signal cables. The ground wire is located in the gap between the power cable and the signal cable, and the outer periphery of the whole formed by the power cable, the signal cable and the ground wire is wrapped by the total shielding layer, and the outer surface of the total shielding layer is covered with a PUR polyurethane sheath.

[0007] The servo brake cable includes a servo brake core wire, a unit shielding layer and a TPE inner sheath. The servo brake core wire is mainly formed by an even number of insulating core wires twisted into pairs of two insulating core wires. Each insulating core wire is mainly composed of a Category 6 conductor and a TPEE insulation material wrapped around the Category 6 conductor. The servo brake core wire is covered with a unit shielding layer, and the unit shielding layer is covered with a TPE inner sheath, forming a structure of a servo brake core wire, a unit shielding layer and a TPE inner sheath from the inside to the outside.

[0008] The signal cable is mainly composed of a signal core wire and a unit shielding layer wrapped around the signal core wire. The signal core wire is mainly formed by an even number of insulating core wires with every two insulating core wires twisted into pairs. The insulating core wire is mainly composed of a Category 6 conductor and TPEE insulation material wrapped around the Category 6 conductor.

[0009] The power cable is formed by twisting a plurality of insulating core wires, wherein the insulating core wires are mainly composed of a Category 6 conductor and a TPEE insulating material wrapped around the Category 6 conductor.

[0010] The number of the ground wire is one, and the ground wire is arranged in the gap between a power cable and a signal cable that are arranged adjacent to each other.

[0011] The ground wire is mainly composed of a Category 6 conductor and TPEE insulation material wrapped around the Category 6 conductor.

[0012] The six types of conductors are IEC 60332 type 6 superconductors.

[0013] The unit shielding layer and the overall shielding layer are braided with tinned copper wires.

[0014] The PUR polyurethane sheath is made of PUR polyurethane material.

[0015] The material used for the TPE inner sheath is TPE.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. As an improvement to the present invention, the servo brake cable uses TPE as its inner sheath. TPE has high ductility and a low plasticizing temperature. This high ductility prevents the inner sheath from cracking even after repeated twisting and bending, while maintaining structural stability. The low plasticizing temperature prevents damage to the inner core wire during extrusion.

[0018] 2. The core wire adopts IEC 60332 Category 6 superconductor and TPEE material. The TPEE insulation material has high tensile strength and excellent bending modulus, which can withstand various mechanical stresses caused by the frequent bending activities of industrial robot arms. At the same time, its excellent wear resistance also provides higher reliability for the cable.

[0019] 3. As an improvement to this invention, the PUR sheath utilizes a proprietary polyurethane (PUR) material composed by weight of 70% polyether (TPU), 15% flame retardant, 2% antioxidant, 3% lubricant, 5% compatibilizer, and 5% special rubber. Its superior tensile strength provides reliable resistance to the strain in complex robotic environments.

[0020] Overall, this utility model boasts an ingenious structural design. The cable's four power lines, servo brake lines, and signal lines utilize a rationally designed structure, reducing the cable's outer diameter and increasing installation space while also improving torsional resistance. This patented utility model addresses the issue of a composite cable for power and signal transmission in dynamic applications within a robot, ensuring stable power and signal transmission performance even in the robot's high-load, high-strength, and high-durability environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a highly flexible anti-torsion cable for industrial robots.

[0022] In the figure: 1. Power cable, 2. Servo brake cable, 3. Signal cable, 4. TPE inner sheath, 5. Unit shield layer, 6. Overall shield layer, 7. PUR polyurethane sheath. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0024] The cross-sectional structure of highly flexible and torsion-resistant cables for industrial robots is as follows: Figure 1 As shown, it includes a power cable 1, a servo brake cable 2, a signal cable 3, a total shielding layer 6, a PUR polyurethane sheath 7 and a ground wire; the servo brake cable 2 is located at the center of the cable, and there are several power cables 1 and signal cables 3. Several power cables 1 and several signal cables 3 are arranged in a star-twisted manner around the servo brake cable 2 as the center. The power cables 1 and the signal cables 3 are alternately arranged along the circumference around the servo brake cable 2. A power cable 1 is provided between every two adjacent signal cables 3. The ground wire is located in the gap between the power cable 1 and the signal cable 3. The outer periphery of the whole formed by the power cable 1, the signal cable 3 and the ground wire is wrapped by the total shielding layer 6, and the outer surface of the total shielding layer 6 is covered with a PUR polyurethane sheath 7.

[0025] The cross-sectional structure of highly flexible and torsion-resistant cables for industrial robots is as follows: Figure 1As shown, the servo brake cable 2 includes a servo brake core wire, a unit shielding layer 5 and a TPE inner sheath 4. The servo brake core wire is mainly formed by an even number of insulated core wires twisted into pairs of two insulated core wires. Each insulated core wire is mainly composed of a Category 6 conductor and a TPEE insulation material wrapped around the Category 6 conductor. The servo brake core wire is covered with a unit shielding layer 5, and the unit shielding layer 5 is covered with a TPE inner sheath 4, forming a structure of a servo brake core wire, a unit shielding layer 5 and a TPE inner sheath 4 from the inside to the outside.

[0026] The signal cable 3 primarily consists of a signal core wire and a unit shield 5 wrapped around it. The signal core wires are primarily composed of an even number of insulated core wires, twisted into pairs. The insulated core wires primarily consist of ultra-fine Category 6 conductors wrapped in TPEE insulation. Cotton thread is inserted between the servo brake core wire and the unit shield 5, and between the signal core wire and the unit shield 5.

[0027] The power cable 1 is formed by twisting a plurality of insulated core wires, wherein the insulated core wires are mainly composed of a Category 6 conductor and TPEE insulation material wrapped around the Category 6 conductor.

[0028] There is one ground wire, which is provided in the gap between a power cable 1 and a signal cable 3 that are arranged adjacent to each other.

[0029] The ground wire is mainly composed of Category 6 conductor and TPEE insulation material wrapped around the Category 6 conductor.

[0030] Category 6 conductors are IEC 60332 Category 6 superconductors. The use of Category 6 ultra-fine copper wire and TPEE insulation material ensures reliability during high-frequency, large-angle bending and torsional movements.

[0031] The unit shielding layer 5 and the overall shielding layer 6 are made of tinned copper wire. The use of tinned copper unit braiding and overall braiding can reduce the interference of external and cable-generated electromagnetic interference on the brake wire and signal wire.

[0032] The PUR sheath 7 can be made of PUR material. This material is primarily composed of 70% polyether TPU, 15% flame retardant, 2% antioxidant, 3% lubricant, 5% compatibilizer, and 5% special rubber by weight. The PUR sheath's superior tensile strength provides reliable mechanical resistance for the cable in the harsh robotic operating environment.

[0033] The TPE inner sheath is made of TPE. Using a TPE inner sheath on a central cable can reduce the mechanical stress on the core wire when the cable is twisted and bent, preventing damage to the core wire caused by huge mechanical stress during twisting, and significantly improving the cable's tensile and torsional resistance.

[0034] Certain modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. Furthermore, although certain specific terms are used in this specification, these terms are for convenience only and do not constitute any limitation on the present invention. As described in the above embodiments of the present invention, other wires and cables with the same or similar structures are also within the scope of protection of the present invention.

Claims

1. A highly flexible, torsion-resistant cable for industrial robots, characterized by: The invention comprises a power cable (1), a servo brake cable (2), a signal cable (3), a total shielding layer (6), a PUR polyurethane sheath (7) and a ground wire; the servo brake cable (2) is located at the center of the cable; a plurality of power cables (1) and signal cables (3) are provided; the plurality of power cables (1) and signal cables (3) are arranged around the servo brake cable (2) as the center; the power cables (1) and signal cables (3) are alternately arranged along the circumference around the servo brake cable (2); a power cable (1) is provided between every two adjacent signal cables (3); the ground wire is located in the gap between the power cable (1) and the signal cable (3); the outer periphery of the whole formed by the power cable (1), the signal cable (3) and the ground wire is wrapped by the total shielding layer (6); and the outer surface of the total shielding layer (6) is coated with the PUR polyurethane sheath (7).

2. The highly flexible anti-torsion cable for industrial robots according to claim 1, characterized in that: The servo brake cable (2) comprises a servo brake core wire, a unit shielding layer (5) and a TPE inner sheath (4), wherein the servo brake core wire is mainly formed by twisting an even number of insulating core wires with two insulating core wires in each pair, and each insulating core wire is mainly composed of a Category 6 conductor and a TPEE insulating material wrapped around the Category 6 conductor. The servo brake core wire is coated with a unit shielding layer (5), and the unit shielding layer (5) is coated with a TPE inner sheath (4), forming a structure comprising, from the inside to the outside, the servo brake core wire, the unit shielding layer (5) and the TPE inner sheath (4).

3. The highly flexible anti-torsion cable for industrial robots according to claim 1, characterized in that: The signal cable (3) is mainly composed of a signal core wire and a unit shielding layer (5) wrapped around the signal core wire. The signal core wire is mainly formed by twisting an even number of insulating core wires in pairs of two insulating core wires. The insulating core wire is mainly composed of a Category 6 conductor and TPEE insulating material wrapped around the Category 6 conductor.

4. The highly flexible anti-torsion cable for industrial robots according to claim 1, characterized in that: The power cable (1) is formed by twisting a plurality of insulating core wires, wherein the insulating core wires are mainly composed of a Category 6 conductor and a TPEE insulating material wrapped around the Category 6 conductor.

5. The highly flexible anti-torsion cable for industrial robots according to claim 1, characterized in that: The number of the ground wire is one, wherein the ground wire is provided in the gap between a power cable (1) and a signal cable (3) that are arranged adjacently.

6. The highly flexible anti-torsion cable for industrial robots according to claim 1, characterized in that: The ground wire is mainly composed of a Category 6 conductor and TPEE insulation material wrapped around the Category 6 conductor.

7. The highly flexible anti-torsion cable for industrial robots according to claim 2, characterized in that: The six types of conductors are IEC 60332 type 6 superconductors.

8. The highly flexible torsion-resistant cable for industrial robots according to claim 2 or 3, characterized in that: The unit shielding layer (5) and the overall shielding layer (6) are made by braiding tinned copper wires.

9. The highly flexible anti-torsion cable for industrial robots according to claim 1, characterized in that: The PUR polyurethane sheath (7) is made of PUR polyurethane material.

10. The highly flexible anti-torsion cable for industrial robots according to claim 2, characterized in that: The material used for the TPE inner sheath is TPE.

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