Polypropylene composite cable for robot

Abstract

The utility model belongs to the field of cables, and provides a polypropylene composite cable for a robot, which comprises a cable core formed by twisting a plurality of power wire cores, a plurality of loose tube optical fiber transmission units and polypropylene filling ropes, and is characterized in that the loose tube optical fiber transmission units are used for realizing data capacity transmission and monitoring the operation state of the robot on line; the cable core is sequentially wrapped by a polyester belt, a shielding layer and a sheath layer from inside to outside. Compared with the prior art, the utility model has the advantages that through the loose tube optical fiber transmission unit, the data transmission speed and capacity are improved, the operation state of the robot can be monitored in real time, convenience is provided for maintenance and troubleshooting, and meanwhile, under the sequential wrapping of the polyester belt, the shielding layer and the sheath layer, the transmission efficiency is improved. Therefore, the cable has the characteristics of bending resistance, wear resistance, excellent waterproof performance and reliable tensile strength, and the service life is prolonged while the cable adapts to the working environment.

Description

Technical Field

[0001] This utility model belongs to the field of cables, specifically relating to a polypropylene composite cable for robots. Background Technology

[0002] This cable is mainly used in robotic arms, a new type of device developed in the process of mechanized and automated production, and is widely used in modern automated production.

[0003] With the widespread application of robotic arms on industrial production lines, the requirements for cables that can provide power and transmit signals have become increasingly complex and stringent, especially in robotic arms with three or more axes. Existing cables often lack characteristics such as bending resistance, abrasion resistance, excellent waterproof performance, reliable tensile strength, large transmission capacity, and online monitoring capabilities, thus failing to adapt to the ever-changing working environment and the demands of high-frequency movements. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a polypropylene composite cable for robots that can provide power and transmit signals, and has a simple, stable and reliable overall structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a polypropylene composite cable for robots, comprising: a cable core made of several power wire cores, several loose tube optical fiber transmission units and polypropylene filler rope twisted together, wherein the loose tube optical fiber transmission units are used to realize the transmission of data capacity and to monitor the working status of the robot online.

[0006] The cable core is wrapped with polyester tape, shielding layer and sheath layer from the inside out.

[0007] In the aforementioned polypropylene composite cable for robots, the loose tube optical fiber transmission unit is placed between the polypropylene filler ropes and twisted with the power core to form the cable core. The loose tube optical fiber transmission unit includes an aramid braided layer and a flexible polypropylene cable sheath wrapped sequentially from the inside out.

[0008] In the aforementioned polypropylene composite cable for robots, the braiding density of the aramid fiber braided layer is above 90%.

[0009] In the aforementioned polypropylene composite cable for robots, the power core is composed of stranded soft copper conductors and extruded polypropylene insulation.

[0010] In the aforementioned polypropylene composite cable for robots, the stranded soft copper conductor is made of several strands of fine copper wires twisted together.

[0011] In the aforementioned polypropylene composite cable for robots, the extruded polypropylene insulation layer includes a non-woven fabric tape and an insulation layer. After the stranded soft copper conductor is formed, a layer of lightweight non-woven fabric can be wrapped around it, so that the thickness of the insulation layer is uniform and flat.

[0012] In the aforementioned polypropylene composite cable for robots, the shielding layer includes an aluminum foil strip and a braided shielding layer. The cable core, which is wrapped with the polyester strip, is longitudinally wrapped with a layer of the aluminum foil strip, and the braided shielding layer is woven into the aluminum foil strip.

[0013] In the aforementioned polypropylene composite cable for robots, the braided shielding layer is made of tin-plated soft copper wire braided into the aluminum foil strip with a density of 80% or higher.

[0014] In the aforementioned polypropylene composite cable for robots, after cabling, the cable core is wrapped with an overlap layer of polyester tape with a 20% overlap rate.

[0015] In the aforementioned polypropylene composite cable for robots, the outer sheath is made of modified polyurethane sheath material.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The polypropylene composite cable for robots of this utility model not only improves the data transmission speed and capacity through the loose tube optical fiber transmission unit, but also monitors the robot's operating status in real time, providing convenience for maintenance and troubleshooting. At the same time, under the sequential wrapping of polyester tape, shielding layer and sheath layer, the cable has the characteristics of bending resistance, wear resistance, excellent waterproof performance and reliable tensile strength, adapting to the working environment and extending its service life.

[0018] (2) The flexible polypropylene cable sheath has good low temperature resistance and flexibility, which effectively improves the original stress whitening phenomenon of polypropylene cable.

[0019] (3) While binding the cable core with polyester tape with an overlap rate of more than 20%, it can also effectively prevent damage to the power core. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this application.

[0021] In the diagram, 1 is the power conductor; 10 is the stranded soft copper conductor; 11 is the extruded polypropylene insulation layer; 110 is the non-woven tape; and 111 is the insulation layer.

[0022] 2. Loose tube fiber optic transmission unit; 20. Aramid fiber braided layer; 21. Flexible polypropylene cable sheath;

[0023] 3. Polypropylene filled rope;

[0024] 4. Polyester tape;

[0025] 5. Shielding layer; 50. Aluminum foil tape; 51. Braided shielding layer;

[0026] 6. Sheath layer. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] like Figure 1 As shown, this utility model discloses a polypropylene composite cable for robots, comprising: a cable core formed by twisting together several power cores 1, several loose tube optical fiber transmission units 2, and polypropylene filler rope 3, wherein the loose tube optical fiber transmission units 2 are used to realize data transmission and online monitoring of the robot's operating status; the cable core is wrapped with polyester tape 4, shielding layer 5, and sheath layer 6 from the inside out.

[0030] Specifically, in order to achieve higher data capacity transmission and online monitoring of the robot's overall operation, this embodiment introduces a high-strength loose-tube fiber optic transmission unit 2. This not only supports large-capacity data flow but also ensures high speed and low latency, enabling the robot to respond quickly to commands and ultimately achieve real-time communication with external systems or other robots. Furthermore, real-time monitoring of the robot's operating status, such as environmental parameters like temperature and pressure, as well as the working condition of its mechanical structure, through the fiber optic transmission unit helps to promptly identify potential problems. Regarding the overall cable protection measures: this embodiment wraps the cable core with polyester tape 4 to provide initial physical protection; a shielding layer 5 is used to resist external electromagnetic interference and ensure the stability of signal transmission; and the outermost sheath layer 6 further enhances the overall strength and wear resistance of the cable. Therefore, this robot polypropylene composite cable can provide power and transmit signals to the robot while, through the innovation and application of new materials and processes, achieving a composite cable with bending and wear resistance, reliable tensile strength, large transmission capacity, excellent environmental performance, and online monitoring capabilities. It adapts to the working environment while extending its service life.

[0031] The loose tube fiber optic transmission unit 2 is placed between polypropylene filler ropes 3 and twisted with the power core 1 to form a cable core. The loose tube fiber optic transmission unit 2 includes an aramid braided layer 20 and a flexible polypropylene cable sheath 21 wrapped from the inside out.

[0032] like Figure 1 As shown, the loose tube fiber optic transmission unit 2 in this embodiment also uses a high-strength loose tube fiber optic transmission unit 2. This high-strength loose tube fiber optic transmission unit 2 internally contains signal transmission fiber and temperature measurement fiber, used to achieve high data capacity transmission and online monitoring of the robot's operating status. By integrating the fiber optic transmission unit with the power core 1, space is saved, and it also facilitates the fulfillment of complex wiring requirements within a limited space. Therefore, this design ensures the stability and compactness of the entire cable core structure, preventing deformation or damage during frequent robot movements, while also providing good protection for the fiber optic transmission unit. Furthermore, the use of high-quality materials (such as aramid fiber and polypropylene) with excellent electrical insulation properties and low dielectric constant helps reduce signal loss and improve data transmission reliability.

[0033] Preferably, the flexible polypropylene cable sheath 21 in this embodiment has good low-temperature resistance and flexibility. This not only enhances the flexibility of the optical fiber transmission unit, enabling it to adapt to complex wiring paths and environmental conditions and extend its service life, but also improves its performance in low-temperature environments, reducing material aging and embrittlement caused by temperature changes. It also effectively improves the original stress-induced whitening phenomenon of polypropylene cables. Furthermore, this highly integrated design simplifies cable management and maintenance, reducing the overall system complexity and cost.

[0034] More preferably, for the high-strength loose tube optical fiber transmission unit 2, a high-strength aramid fiber braided layer 20 with a braiding density of not less than 90% is used inside the loose tube optical fiber. The use of this high-strength aramid fiber braided layer 20 can significantly improve the overall tensile strength of the optical fiber transmission unit. The high-density braiding of more than 90% means that more fibers are intertwined, forming a strong protective net, which effectively prevents the optical fiber from breaking when subjected to external tension. This also makes the aramid fiber itself have extremely high wear resistance, which can withstand the friction and impact caused by the frequent movement of the robotic arm, thus extending the service life of the optical fiber transmission unit.

[0035] More preferably, since the high-strength aramid fiber braided layer 20 provides reliable physical protection, the robot's operating status, including key parameters such as temperature changes, can be monitored in real time by introducing temperature-sensing optical fibers, enabling higher data capacity transmission. This provides an important basis for equipment maintenance and troubleshooting, and improves the reliability and safety of the equipment.

[0036] like Figure 1As shown, the power core 1 in this embodiment consists of a stranded soft copper conductor 10 and an extruded polypropylene insulation layer 11. The stranded soft copper conductor 10 is made by stranding multiple fine copper wires together. During this process, the conductor formed by stranding multiple fine copper wires has extremely high flexibility and bending resistance, and can withstand large tensile forces. It can also adapt to the needs of frequent robotic arm movements, reducing the risk of damage due to bending. Furthermore, the stranding process allows the conductor to maintain its structural integrity even under large tensile forces, enhancing the overall tensile strength of the cable.

[0037] The extruded polypropylene insulation layer 11 includes a non-woven fabric tape 110 and an insulation layer 111. After the twisted soft copper conductor 10 is formed, a layer of lightweight non-woven fabric can be wrapped around it, so that the insulation layer 111 has a uniform thickness and is flat.

[0038] like Figure 1 As shown, after the conductor inside the power core 1 is formed by twisting the multi-strand filaments (i.e., the conductor is now formed), a precision wrapping device (not shown in the figure) can be used to tightly wrap the lightweight non-woven fabric tape 110 (i.e., the non-woven fabric tape 110 in this embodiment) around the twisted soft copper conductor 10, ensuring that each turn is evenly covered and avoiding gaps or overlaps. The main purpose of this step is to ensure that the insulation layer 111 has a uniform thickness and is flat, to prevent uneven conductor surfaces from affecting the insulation effect, and to provide additional mechanical protection. Meanwhile, an extruder (not shown in the figure) evenly extrudes molten polypropylene material and wraps it around the outer layer of the non-woven fabric tape 110, forming a continuous and uniform insulation layer 111. During the extrusion process, temperature and pressure need to be precisely controlled to ensure that the insulation layer 111 has a uniform thickness and a smooth surface.

[0039] It should be noted that the insulation layer 111 in this embodiment is made of polypropylene. This polypropylene material has high current carrying capacity, high temperature resistance, and excellent electrical insulation properties, ensuring that the cable can maintain good power transmission performance even in high-temperature environments. Preferably, the polypropylene material in this embodiment is recyclable, which is in line with environmental protection principles. Polypropylene is a polymer composed of propylene monomers linked by covalent bonds. The propylene monomers on its molecular chain are connected by carbon-carbon single bonds to form a linear chain structure. Depending on the spatial arrangement of the methyl groups in the side chains, it can be divided into three forms: isotactic, syndiotactic, and atactic.

[0040] The shielding layer 5 includes an aluminum foil strip 50 and a braided shielding layer 515. The cable core wrapped with polyester tape 4 is longitudinally wrapped with an aluminum foil strip 50, and the braided shielding layer 515 is woven into the aluminum foil strip 50.

[0041] like Figure 1As shown, a specialized longitudinal wrapping device (not shown) is used to tightly wrap the aluminum foil strip 50 around the outer layer of the cable core wrapped with polyester tape 4. During the longitudinal wrapping process, it is necessary to ensure that the aluminum foil strip 50 is free of wrinkles or gaps to guarantee a uniform shielding effect. Tin-plated copper wire is chosen as the material for the braided shielding layer 515 because of its excellent conductivity and corrosion resistance. Therefore, the dual shielding design of the aluminum foil strip 50 and the braided shielding layer 515 effectively reduces external electromagnetic interference and ensures the quality and stability of signal transmission. Preferably, since the current flowing through the power core 1 is relatively large, a magnetic field is generated around the current. To avoid affecting the normal operation of other components, this embodiment can also include a signal or power conductor wrapped inside the shielding layer 5. These two methods serve to prevent electromagnetic noise interference.

[0042] Preferably, after the cable core with the polyester tape 4 structure is longitudinally wrapped with an aluminum foil tape 50, a layer of tin-plated soft copper wire with a density of not less than 80% is then braided to form the required shielding layer 5. This design ensures the maximization of the shielding effect. The tin-plated copper wire is evenly braided on the outer layer of the aluminum foil tape 50 using precision braiding equipment. During the braiding process, tension and speed need to be controlled to ensure the uniformity and tightness of the braided layer.

[0043] More preferably, such as Figure 1 As shown, after the cable core is stranded and formed, this embodiment also wraps a layer of polyester tape 4 with an overlap rate of 20% around the cable core. This design can restrain the cable core and also protect the power core 1 from damage, effectively improving the long-term reliability and durability of the cable.

[0044] More preferably, in this embodiment, the outer sheath is made of modified polyurethane sheath layer 6 material, which has excellent mechanical properties, wear resistance, low temperature resistance and high elasticity, so that the robot can achieve a high elasticity and wear resistance effect when winding and unwinding the cable.

[0045] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A polypropylene composite cable for robots, characterized in that, The cable core is composed of a plurality of power line cores, a plurality of loose tube optical fiber transmission units and polypropylene filling ropes, wherein the loose tube optical fiber transmission units are used to realize transmission of data capacity and online monitoring of the working state of the mechanical man. The cable core is sequentially wrapped with a polyester tape, a shielding layer and a sheath layer from the inside to the outside. The loose tube optical fiber transmission units are arranged between the polypropylene filling ropes and twisted with the power line cores to form the cable core.

2. The polypropylene composite cable for robots according to claim 1, characterized in that, The weaving density of the aramid yarn weaving layer is more than 90%.

3. A polypropylene composite cable for robots according to claim 2, characterized in that The power line core is composed of a twisted soft copper conductor and an extruded polypropylene insulation layer.

4. The polypropylene composite cable for robots according to claim 1, characterized in that, The twisted soft copper conductor is twisted with a plurality of thin copper wires.

5. A polypropylene composite cable for robots according to claim 4, characterized in that The extruded polypropylene insulation layer includes a non-woven fabric tape and an insulation layer.

6. A polypropylene composite cable for robots according to claim 4, characterized in that The twisted soft copper conductor is wrapped with a light non-woven fabric after molding, so that the thickness of the insulation layer is uniform and flat.

7. The polypropylene composite cable for robots according to claim 1, wherein The shielding layer includes an aluminum foil tape and a woven shielding layer.

8. A polypropylene composite cable for robots according to claim 7, characterized in that The woven shielding layer is made of a tinned soft copper wire which is woven on the aluminum foil tape and has a density of more than 80%.

9. The polypropylene composite cable for robots according to claim 1, characterized in that, The cable core after cabling is wrapped with a polyester tape with a lap rate of 20%.

10. The polypropylene composite cable for robots according to claim 1, characterized in that, The outer sheath is made of a modified polyurethane sheath layer material.

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