Sheath-free body integrated cable for six-axis industrial robot

Abstract

The utility model discloses a sheath-free body integrated cable for a six-axis industrial robot. The cable is only composed of power transmission core wires, signal transmission core wires, a Kevlar filling layer and a nylon braided tube, the nylon braided tube wraps the Kevlar filling layer, the Kevlar filling layer is internally provided with a plurality of core wires, the core wires comprise the power transmission core wires and the signal transmission core wires, the power transmission core wires are composed of a Teflon ETFE power transmission cable, and the signal transmission core wires are composed of a Teflon ETFE power transmission cable. The signal transmission core wire is formed by twisting two Teflon ETFE power transmission and servo band-type brake cables. The cable provided by the utility model adopts a sheath-free design, can realize wiring and installation in a narrow space in a small robot mechanical arm, can significantly improve the tensile strength and wear resistance of the cable and the bending resistance of the core wire in high-frequency and large-angle bending, and prolongs the service life of the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, in particular to a sheath-free body integrated cable for a six-axis industrial robot. 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 demand for intelligent industrial production, industrial robots are gradually evolving from modular to complex and multifunctional. As carriers of power and data signals, cables for industrial robots must also meet higher performance requirements such as bending resistance, torsion resistance, and mobility resistance.

[0004] Existing unsheathed cables for six-axis industrial robots have several drawbacks in practical applications. The primary drawback is that, without a protective outer layer, their wear resistance is significantly reduced. The frequent movement and friction of industrial robots can easily wear out the cable sheath, potentially even damaging it, compromising its proper function. Furthermore, robots are required to perform a variety of complex movements, including twisting and bending. Unsheathed cables are more susceptible to damage when subjected to torsional forces due to a lack of adequate support and protection, leading to unstable or even interrupted signal transmission. Utility Model Content

[0005] In order to solve the problems existing in the background technology, the utility model provides a sheathless body integrated cable for a six-axis industrial robot, which solves the problem that the robot body's dynamic application power and signal transmission composite cable can still maintain stable power transmission and signal transmission performance under the robot's high load, high strength and high durability environment.

[0006] The technical solution adopted in this utility model is:

[0007] The utility model is composed only of a power transmission core wire, a signal transmission core wire, a Kevlar filling layer and a nylon braided tube. The nylon braided tube is wrapped around the Kevlar filling layer. A plurality of core wires are arranged in the Kevlar filling layer. The core wires include a power transmission core wire and a signal transmission core wire. The power transmission core wire is composed of a Teflon ETFE power transmission cable, and the signal transmission core wire is composed of two Teflon ETFE power transmission and servo brake cables twisted together.

[0008] The Teflon ETFE power transmission and servo brake cable includes a tinned copper alloy conductor and ETFE insulation material.

[0009] The power transmission core wire is mainly composed of a tinned copper alloy conductor covered with ETFE insulation material, and the signal transmission core wire is mainly composed of two tinned copper alloy conductors twisted together and covered with ETFE insulation material and arranged in pairs.

[0010] The tinned copper alloy conductor is a Category VI tinned copper alloy conductor specified in IEC 60228.

[0011] The Kevlar filling layer is made of Kevlar material.

[0012] The nylon braided tube is formed by braiding with Kevlar.

[0013] There is no sheath outside the nylon braided tube.

[0014] The utility model has an ingenious structural design, and its structure is composed of tinned alloy copper wire, Teflon ETFE power transmission and servo brake cables, Kevlar braiding, and nylon braided tubes.

[0015] This patented, unsheathed cable for six-axis industrial robots utilizes ETFE insulation, a material with high tensile strength and superior flexural modulus. It can withstand the various mechanical stresses caused by the frequent bending and flexing of industrial robot arms. Its excellent wear resistance also provides enhanced cable reliability. The outer insulation layer is protected by a nylon braided tubing. Combining the excellent properties of nylon with the flexibility of the braided structure, the nylon braided tubing provides comprehensive mechanical, chemical, and thermal protection for the robot cable. By protecting the cable from external damage and extending its service life, the nylon braided tubing helps improve the overall performance and stability of the robot, reducing downtime and repair costs caused by cable failures.

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

[0017] The utility model has an ingenious structural design. The tinned alloy copper wire conductor and ETFE insulation material can provide reliable power and signal transmission for the core wire. The Kevlar material can significantly enhance the tensile strength of the cable, making the cable tougher and less likely to break when subjected to external forces. The nylon braided tube combines the excellent performance of nylon material with the flexibility of the braided structure, providing comprehensive protection for the robot cable, including mechanical protection, chemical protection and thermal protection.

[0018] By protecting cables from external damage and extending their service life, nylon braided tubing helps improve the overall performance and stability of the robot, reducing downtime and repair costs caused by cable failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a sheathless body integrated cable for a six-axis industrial robot.

[0020] In the figure: 1. Tinned copper alloy conductor, 2. ETFE insulation material, 3. Kevlar filler material, 4. Nylon braided tube. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 As shown, the integrated cable consists only of a power transmission core wire, a signal transmission core wire, a Kevlar filling layer 3 and a nylon braided tube 4. The nylon braided tube 4 is wrapped around the Kevlar filling layer 3. Several core wires are arranged inside the Kevlar filling layer 3. The core wires include a power transmission core wire and a signal transmission core wire. The power transmission core wire is composed of a Teflon ETFE power transmission cable, and the signal transmission core wire is composed of two Teflon ETFE power transmission and servo brake cables twisted together.

[0023] The Teflon ETFE power transmission and servo brake cable includes a tinned copper alloy conductor 1 and an ETFE insulation material 2.

[0024] The power transmission core wire is mainly composed of tinned alloy copper conductors 1 twisted together and then covered with ETFE insulation material 2, and the signal transmission core wire is mainly composed of two tinned alloy copper conductors 1 twisted together and then covered with ETFE insulation material 2, which are twisted together and arranged in pairs.

[0025] The tinned alloy copper conductors 1 of the power transmission core wire and the signal transmission core wire are both made of extremely fine tinned alloy copper wire to increase flexibility.

[0026] In the specific production, the core wire is composed of tinned alloy copper conductor 1 twisted by back-twisting process and then covered with ETFE insulation material 2. The ETFE core wire adopts Kevlar braided layer 3 as tensile member and nylon braided tube 4 as protective layer.

[0027] ETFE insulation material has high tensile strength and excellent flexural modulus, and can withstand the various mechanical stresses caused by the frequent bending and flexing activities of the humanoid robot's knee joint. At the same time, its excellent wear resistance also provides higher reliability for the cable. At the same time, its excellent wear resistance and fatigue resistance enable the cable to maintain good performance stability during long-term use.

[0028] The structure of the utility model mainly includes a power transmission core wire, a signal transmission core wire, a Kevlar filling layer 3 and a nylon braided tube 4. The design of using tinned alloy copper and ETFE insulation material can provide reliability for the core wire during high-frequency and large-angle bending and twisting movements.

[0029] The overall cable structure adopts a sheath-free design, which can realize wiring and installation in the narrow space of small robot arms. The ETFE insulation material has high tensile strength and excellent bending modulus, and 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.

[0030] Tinned copper alloy conductor 1 is a Category VI tinned copper alloy conductor in accordance with IEC 60228. Tinned copper inhibits conductor oxidation, while the copper alloy exhibits exceptionally high ductility and tensile strength. The Category 6 ultra-fine conductor provides the required flexibility for cables. Therefore, the above design ensures that cables used in industrial robots possess both high flexibility and high reliability.

[0031] The Kevlar filling layer 3 is made of Kevlar material. Kevlar material is a tensile member that can significantly enhance the tensile strength of the cable, making the cable more resilient and less likely to break when subjected to external forces.

[0032] The core cable is braided with Kevlar material for the tensile strength. Kevlar, originally known as poly(p-phenylene terephthalamide), has low density, high strength, and excellent toughness. Its high strength, abrasion resistance, and tear resistance have made it a staple in body armor. Kevlar's high strength significantly enhances the cable's tensile strength, making it more resilient and less susceptible to breakage when subjected to external forces. Its high abrasion resistance effectively resists the mechanical wear and tear that can occur during knee movement. This means the cable will maintain a longer lifespan despite frequent movement, bending, and other physical impacts.

[0033] The nylon braided tube 4 is formed by braiding Kevlar, which can significantly improve the tensile strength and wear resistance of the cable.

[0034] The Kevlar braid is covered with a nylon braided tubing. Combining the superior performance of nylon with the flexibility of a braided structure, the nylon braided tubing provides comprehensive mechanical, chemical, and thermal protection for robot cables. By protecting the cable from external damage and extending its service life, the nylon braided tubing helps improve the robot's overall performance and stability, reducing downtime and repair costs caused by cable failures.

[0035] As an improvement of the present invention, the nylon braided tube 4 has no outer sheath.

[0036] Because industrial robots with four- and six-axis arms have limited space and a small bending radius, this utility model adopts a sheath-free design, replacing traditional sheaths with nylon braided tubing. Combining the excellent performance of nylon with the flexibility of the braided structure, the nylon braided tubing provides comprehensive mechanical, chemical, and thermal protection for the robot's cables. By protecting the cables from external damage and extending their service life, the nylon braided tubing helps improve the robot's overall performance and stability, reducing downtime and repair costs caused by cable failures.

[0037] 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 sheathless body integrated cable for a six-axis industrial robot, characterized by: The invention is composed of only a power transmission core wire, a signal transmission core wire, a Kevlar filling layer (3) and a nylon braided tube (4), wherein the nylon braided tube (4) is wrapped around the Kevlar filling layer (3), and a plurality of core wires are arranged in the Kevlar filling layer (3), wherein the core wires include a power transmission core wire and a signal transmission core wire, wherein the power transmission core wire is composed of a Teflon ETFE power transmission cable, and the signal transmission core wire is composed of two Teflon ETFE power transmission and servo brake cables twisted together.

2. The sheathless body integrated cable for a six-axis industrial robot according to claim 1, characterized in that: The Teflon ETFE power transmission and servo brake cable comprises a tinned copper alloy conductor (1) and an ETFE insulating material (2).

3. The sheathless body integrated cable for a six-axis industrial robot according to claim 1, characterized in that: The power transmission core wire is mainly composed of a tinned copper alloy conductor (1) covered by an ETFE insulating material (2), and the signal transmission core wire is mainly composed of two tinned copper alloy conductors (1) twisted together and covered by an ETFE insulating material (2) to form a twisted pair of core wires.

4. The sheathless body integrated cable for a six-axis industrial robot according to claim 2, characterized in that: The tinned copper alloy conductor (1) is a tinned copper alloy conductor of category VI specified in IEC 60228.

5. The sheathless body integrated cable for a six-axis industrial robot according to claim 1, characterized in that: The Kevlar filling layer (3) is made of Kevlar material.

6. The sheathless body integrated cable for a six-axis industrial robot according to claim 1, characterized in that: The nylon braided tube (4) is formed by Kevlar braiding.

7. The sheathless body integrated cable for a six-axis industrial robot according to claim 1, characterized in that: The nylon braided tube (4) has no outer sheath.

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