High-torsion flexible robot cable and method of manufacturing the same

Abstract

The application discloses a kind of high torsional flexibility flexible robot cable and preparation method thereof, including conductor core, the conductor core side wall is covered with shielding layer, the shielding layer side wall is covered with insulating layer, the insulating layer side wall is covered with filling layer, the filling layer side wall is covered with waterproof layer, the waterproof layer side wall is covered with flame-retardant layer, the flame-retardant layer side wall is covered with outer protective sleeve, the conductor core is made of oxygen-free copper wire, and the diameter of the oxygen-free copper wire is 0.08mm, the shielding layer is made of tinned copper wire, the filling layer is made of Kevlar fiber material, the waterproof layer is made of aluminum plastic composite material, the flame-retardant layer is made of ethylene-propylene rubber material.The filling layer in the application is made of Kevlar fiber material, since Kevlar fiber has very high strength, and flexibility is very good, can greatly increase the high resistance and flexibility of cable, avoid cable to be damaged after being bent multiple times.

Description

Technical Field

[0001] This invention relates to the field of robot cable technology, and in particular to a high-torsion-resistant flexible robot cable and its preparation method. Background Technology

[0002] A robot is an intelligent machine capable of semi-autonomous or fully autonomous operation. Robots can perform tasks such as work or movement through programming and automatic control. They possess basic characteristics such as perception, decision-making, and execution, and can assist or even replace humans in dangerous, arduous, and complex tasks, improving work efficiency and quality, serving human life, and expanding or extending the scope of human activities and capabilities. Wires and cables, on the other hand, are wire products used to transmit electrical energy, information, and realize electromagnetic energy conversion. In a broad sense, wires and cables are also simply called cables; in a narrow sense, cables refer to insulated cables, which can be defined as an assembly consisting of one or more insulated cores, and their respective possible sheaths, overall protective layers, and outer sheaths. Cables may also have additional uninsulated conductors. Existing robots typically have a large number of cables inside for current transmission, allowing control commands to be accurately transmitted to the machine's control program, thus enabling the robot to operate.

[0003] During operation, existing robots require their internal cables to bend due to the flexibility of their arms, legs, and other parts. This necessitates that the cables possess strong resistance and flexibility to prevent damage from repeated bending during robot operation. This is a pressing issue that needs to be addressed in robot cable design.

[0004] Based on this, we propose a high-torsion-resistant flexible robot cable and its preparation method. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-torsion-resistance flexible robot cable and its preparation method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A high-torsion-resistant flexible robot cable includes: a conductor core, a shielding layer covering the sidewall of the conductor core, an insulation layer covering the sidewall of the shielding layer, a filler layer covering the sidewall of the insulation layer, a waterproof layer covering the sidewall of the filler layer, a flame-retardant layer covering the sidewall of the waterproof layer, and an outer protective sheath covering the sidewall of the flame-retardant layer.

[0007] Preferably, the shielding layer is made of tin-plated copper wire.

[0008] Preferably, the filling layer is made of Kevlar fiber material.

[0009] Preferably, the waterproof layer is made of aluminum-plastic composite material.

[0010] Preferably, the flame-retardant layer is made of ethylene propylene rubber.

[0011] Preferably, the outer protective sleeve is made of PVC material.

[0012] Preferably, the conductor core is made of oxygen-free copper wire, and the diameter of the oxygen-free copper wire is 0.08 mm.

[0013] A method for preparing a highly torsion-resistant flexible robot cable includes the following steps: S1. First, prepare the conductor core by twisting multiple wires together to form a conductor bundle. Then, use a screw extruder to melt and extrude the conductor bundle. After it cools naturally, cross-link the conductor bundle to form the conductor core. S2. Prepare the shielding layer by weaving tin-plated copper wire into a mesh to form the shielding layer. The weaving density needs to reach more than 75%. S3. Preparation of insulation layer: Modifier is added to coal gangue particles to modify them, so that the coal gangue particles change from hydrophilic to oleophilic. The modified coal gangue particles are mixed with rubber and plastic elastomer and stirred to obtain the first mixture. Modifier, lubricant, heat stabilizer, vulcanizing agent and stearic acid are added to the first mixture and stirred to obtain the second mixture. The second mixture is then subjected to internal mixing and open milling in sequence to obtain the insulation layer of the cable. S4. The shielding layer and the insulation layer are sequentially wrapped around the outer layer of the conductor core through a vertical cross-linking production process or a catenary cross-linking production process to achieve double-layer co-extrusion. S5. Wrap the filler layer around the insulation layer; S6. Wrap the waterproof layer around the filler layer and apply water-resistant powder to the outside of the waterproof layer; S7. Using a screw extruder, melt-extrude the flame-retardant layer and coat the outside of the waterproof layer. S8. Add PVC material to a screw extruder for melt extrusion, then cut it into pellets to form an outer protective sleeve. Then, put the outer protective sleeve on the outside of the flame retardant layer to form a complete cable. S9. Pack the prepared cables and store them in a well-ventilated place.

[0014] The present invention has the following beneficial effects: 1. By setting a filler layer, which is made of Kevlar fiber material, the cable's high resistance and flexibility can be greatly increased due to the high strength and excellent flexibility of Kevlar fiber, thus preventing the cable from being damaged after being bent multiple times. 2. By setting an outer protective sleeve, which is made of PVC material, the flexibility and wear resistance of the cable can be enhanced. 3. By setting an insulation layer, cable leakage can be effectively prevented, and the insulation layer is made of coal gangue particles and rubber and plastic materials, which are inexpensive; 4. By setting a waterproof layer, the waterproof performance of the cable can be enhanced, preventing moisture from seeping into the cable and causing short circuit damage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a high-torsion-resistant flexible robot cable proposed in this invention.

[0016] In the diagram: 1 Conductor core, 2 Shielding layer, 3 Insulation layer, 4 Filling layer, 5 Waterproof layer, 6 Flame retardant layer, 7 Outer protective sleeve. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Reference Figure 1A high-torsion-resistant flexible robot cable includes: a conductor core 1, a shielding layer 2 covering the sidewall of the conductor core 1, an insulation layer 3 covering the sidewall of the shielding layer 2, which can effectively prevent cable leakage, and the insulation layer 3 is made of coal gangue particles and rubber and plastic materials, which is inexpensive; a filling layer 4 covering the sidewall of the insulation layer 3, a waterproof layer 5 covering the sidewall of the filling layer 4, a flame-retardant layer 6 covering the sidewall of the waterproof layer 5, and an outer protective sheath 7 covering the sidewall of the flame-retardant layer 6.

[0021] The conductor core 1 is made of oxygen-free copper wire with a diameter of 0.08 mm.

[0022] The shielding layer 2 is made of tin-plated copper wire.

[0023] The filler layer 4 is made of Kevlar fiber material. Because Kevlar fiber has very high strength and excellent flexibility, it can greatly increase the cable's resistance and flexibility, and prevent the cable from being damaged after being bent multiple times.

[0024] Waterproof layer 5 is made of aluminum-plastic composite material, which can enhance the waterproof performance of the cable and prevent water from seeping into the cable and causing short circuit damage.

[0025] Flame retardant layer 6 is made of ethylene propylene rubber.

[0026] The outer protective sleeve 7 is made of PVC material, which has strong flexibility and wear resistance, and can enhance the flexibility and wear resistance of the cable.

[0027] A method for preparing a high-torsion-resistant flexible robot cable includes the following steps: S1, firstly, prepare conductor core 1 by twisting multiple wires together to form a conductor bundle, then use a screw extruder to melt and extrude the conductor bundle, and wait for it to cool naturally before cross-linking around the conductor bundle to form conductor core 1; S2. Prepare shielding layer 2 by weaving tin-plated copper wire into a mesh to form shielding layer 2. The weaving density needs to reach more than 75%. S3. Prepare insulation layer 3 by adding a modifier to coal gangue particles to modify them from hydrophilic to oleophilic. Mix the modified coal gangue particles with rubber and plastic elastomer and stir to obtain a first mixture. Add modifier, lubricant, heat stabilizer, vulcanizing agent and stearic acid to the first mixture and stir to obtain a second mixture. Pass the second mixture through internal mixing and open milling in sequence to obtain the insulation layer 3 of the cable. S4. The shielding layer 2 and the insulating layer 3 are sequentially wrapped around the outer layer of the conductor core 1 through a vertical cross-linking production process or a catenary cross-linking production process to achieve double-layer co-extrusion. S5. The filler layer 4 is wrapped around the outer edge of the insulating layer 3; S6. The waterproof layer 5 is wrapped around the filler layer 4, and water-resistant powder is applied to the outside of the waterproof layer 5. S7. Using a screw extruder, melt-extrude the flame retardant layer 6 and wrap the flame retardant layer 6 around the outside of the waterproof layer 5. S8. Add PVC material to a screw extruder for melt extrusion, then cut it into pellets to form an outer protective sleeve 7. Then, put the outer protective sleeve 7 on the outside of the flame retardant layer 6 to form a complete cable. S9. Pack the prepared cables and store them in a well-ventilated place.

[0028] In this invention, a conductor core 1 is first prepared by twisting multiple wires together to form a conductor bundle, and then the conductor bundle is melted and extruded using a screw extruder. After natural cooling, the conductor core 1 is formed by cross-linking around the conductor bundle.

[0029] Next, shielding layer 2 is prepared by weaving tin-plated copper wire into a mesh to form shielding layer 2, with a weaving density of over 75%. Then, insulation layer 3 is prepared by adding a modifier to coal gangue particles to change them from hydrophilic to oleophilic. The modified coal gangue particles are mixed with rubber and plastic elastomers and stirred to obtain a first mixture. Modifiers, lubricants, heat stabilizers, vulcanizing agents, and stearic acid are added to the first mixture and stirred to obtain a second mixture. The second mixture is then subjected to internal mixing and open milling to obtain cable insulation layer 3, which can effectively prevent cable leakage. Insulation layer 3 is made of coal gangue particles and rubber and plastic materials, which is inexpensive. Shielding layer 2 and insulation layer 3 are sequentially coated on the outer layer of conductor core 1 through vertical cross-linking production process or catenary cross-linking production process to achieve double-layer co-extrusion.

[0030] Next, the filler layer 4 is wrapped around the insulation layer 3. The filler layer 4 is made of Kevlar fiber material. Because Kevlar fiber has very high strength and excellent flexibility, it can greatly increase the cable's high resistance and flexibility, preventing the cable from being damaged after repeated bending. The waterproof layer 5 is wrapped around the filler layer 4, and water-blocking powder is coated on the outside of the waterproof layer 5 to enhance the cable's waterproof performance and prevent water from seeping into the cable and causing short circuit damage. Using a screw extruder, the flame-retardant layer 6 is melt-extruded and wrapped around the outside of the waterproof layer 5. PVC material is added to the screw extruder for melt extrusion and then pelletized to form the outer protective sleeve 7. The outer protective sleeve 7 is then fitted over the flame-retardant layer 6 to form a complete cable. The outer protective sleeve 7 is made of PVC material, which has strong flexibility and wear resistance, enhancing the cable's flexibility and wear resistance. Finally, the prepared cable is packaged and stored in a well-ventilated place.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-torsion-resistant flexible robot cable, characterized in that, include: The conductor core (1) has a shielding layer (2) covering its sidewalls, an insulating layer (3) covering its sidewalls, a filling layer (4) covering its sidewalls, a waterproof layer (5) covering its sidewalls, a flame-retardant layer (6) covering its sidewalls, and an outer protective sleeve (7) covering its sidewalls.

2. The high torsion resistance flexible robot cable according to claim 1, characterized in that, in: The conductor core (1) is made of oxygen-free copper wire, and the diameter of the oxygen-free copper wire is 0.08 mm.

3. The high torsion resistance flexible robot cable according to claim 2, characterized in that, in: The shielding layer (2) is made of tin-plated copper wire.

4. The high torsion resistance flexible robot cable according to claim 3, characterized in that, in: The filling layer (4) is made of Kevlar fiber material.

5. A high-torsion-resistant flexible robot cable according to claim 4, characterized in that, in: The waterproof layer (5) is made of aluminum-plastic composite material.

6. The high torsion resistance flexible robot cable according to claim 5, characterized in that, in: The flame-retardant layer (6) is made of ethylene propylene rubber.

7. A high-torsion-resistant flexible robot cable according to claim 6, characterized in that, in: The outer protective sleeve (7) is made of PVC material.

8. A method for preparing a highly torsion-resistant flexible robot cable, characterized in that, Includes the following steps: S1. First, prepare the conductor core (1), twist multiple wires together to form a conductor bundle, then use a screw extruder to melt and extrude the conductor bundle, and wait for it to cool naturally before cross-linking to form the conductor core (1) around the conductor bundle. S2. Prepare the shielding layer (2): Weave tin-plated copper wire into a mesh to form the shielding layer (2). The weaving density needs to reach more than 75%. S3. Preparation of insulation layer (3): Modifier is added to coal gangue particles to modify them, so that the coal gangue particles change from hydrophilic to oleophilic. The modified coal gangue particles are mixed with rubber and plastic elastomer and stirred to obtain the first mixture. Modifier, lubricant, heat stabilizer, vulcanizing agent and stearic acid are added to the first mixture and stirred to obtain the second mixture. The second mixture is then passed through internal mixing and open milling in sequence to obtain the insulation layer (3) of the cable. S4. The shielding layer (2) and the insulating layer (3) are sequentially wrapped around the conductor core (1) by a vertical cross-linking production process or a catenary cross-linking production process to achieve double-layer co-extrusion. S5. The filler layer (4) is wrapped around the outer edge of the insulating layer (3); S6. The waterproof layer (5) is wrapped around the filling layer (4), and water-resistant powder is applied to the outside of the waterproof layer (5); S7. Using a screw extruder, melt-extrude the flame retardant layer (6) and wrap the flame retardant layer (6) around the outside of the waterproof layer (5); S8. Add PVC material to a screw extruder for melt extrusion, then cut it into pellets to form an outer protective sleeve (7), and then put the outer protective sleeve (7) on the outside of the flame retardant layer (6) to form a complete cable; S9. Pack the prepared cables and store them in a well-ventilated place.

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