Combination cable for drag chain system
By designing composite cables for cable carrier systems and employing specific stranding methods and material combinations, the problems of cable breakage and signal interference in the robotics field have been solved, achieving high flexibility and efficient signal transmission.
Patent Information
- Application Number
- CN202423271673.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing cables have low dynamic requirements in the field of robotics, are prone to breakage due to frequent bending movements, have poor signal transmission performance, and are susceptible to electromagnetic interference.
Design a composite cable for a drag chain system, including a signal transmission unit and a control unit, employing a specific stranding method and material combination, using aramid filament filler, modified TPU sheath, etc., to ensure flexibility and signal stability.
The dynamic requirements of the cable have been increased to 10 million cycles, electromagnetic interference has been reduced, the stability and reliability of signal transmission have been ensured, and the transmission efficiency and mechanical strength of the cable have been improved.
Smart Images
Figure CN223665203U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cables, and more particularly to composite cables for cable chain systems. Background Technology
[0002] A cable is a transmission device used to transmit electrical energy or signals, typically composed of several or groups of conductors. It has wide applications in submarine communications, power transmission, and robotics. However, ordinary cables have certain limitations in design and performance. Their dynamic requirements are relatively low, typically only around 3 million cycles, and their transmission performance is relatively poor. Therefore, they are mainly suitable for applications where cable bending and movement requirements are not high. In these applications, the cable may only require occasional manual bending and repositioning in conjunction with equipment movement, or simple spatial installation bending wiring. However, when used in robotics, cables need to be installed in cable carrier systems to follow the frequent up-and-down, left-and-right bending movements or periodic rotational movements of the robot's arm. Ordinary cables, with their relatively low dynamic requirements, are prone to breakage after prolonged use, leading to electromagnetic interference within the cable's circuitry and ultimately affecting signal transmission. Utility Model Content
[0003] The purpose of this invention is to provide a combined cable for cable chain systems that is flexible and has high signal transmission capability.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a combined cable for a drag chain system, comprising: two signal transmission units and two control units, the two signal transmission units and the two control units being twisted into a cable, a central filling rope being filled at the center of the cable, gap filling ropes being filled between each unit, an isolation strip being longitudinally wrapped around the signal transmission units and control units of the cable, and a sheath being extruded onto the isolation strip.
[0005] The signal transmission unit includes: two twisted first insulated core wires, the twist pitch of the two first insulated core wires being 8 to 12 times the outer diameter of the twisted wires; an aluminum-plastic composite tape is longitudinally wrapped around the two twisted first insulated core wires; a first tinned copper wire braid layer is woven on the aluminum-plastic composite tape; a first wrapping tape is wrapped around the first tinned copper wire braid layer; and the first conductor in the first insulated core wire is directly twisted together from 19 φ0.12mm Category 6 tinned copper monowires, the twist pitch of the first conductor being 6 to 10 times the outer diameter of the first conductor.
[0006] The control unit includes: two twisted second insulated core wires, the twisting pitch of the two second insulated core wires being 8 to 12 times the outer diameter of the twisted wires; a second tinned copper wire braid layer is woven on the two twisted second insulated core wires; a second wrapping tape is wrapped around the second tinned copper wire braid layer; the second conductor in the second insulated core wire is formed by dividing 126 φ0.07mm Category 6 tinned copper monowires into 7 strands and then twisting them together in a 1+6 type structure; the twisting pitch of the 7 strands in the second conductor is 6 to 10 times the outer diameter of the second conductor.
[0007] The twisting direction of the Category 6a tinned copper monofilaments in the first conductor, the twisting direction of the Category 6a tinned copper monofilaments in each strand of the second conductor, the twisting direction between the 7 strands, the twisting direction of the two first insulated core wires in the signal transmission unit, the twisting direction of the two second insulated core wires in the control unit, and the twisting direction when the signal transmission unit and the control unit are twisted into a cable are all consistent.
[0008] Furthermore, in the aforementioned combined cable for the cable carrier system, the twisted pitch of the first insulated core wires in the two signal transmission units is different, the twisted pitch of the second insulated core wires in the two control units is different, the twisted pitch of the first insulated core wires and the twisted pitch of the second insulated core wires are different, and the twisted pitch between the signal transmission unit and the control unit is different from both the twisted pitch of the first insulated core wires and the twisted pitch of the second insulated core wires.
[0009] Furthermore, in the aforementioned combined cable for the cable carrier system, the thickness of the aluminum-plastic composite tape is 0.05 mm, and the longitudinal overlap rate is 20% to 50%.
[0010] Furthermore, in the aforementioned combined cable for the cable carrier system, the first tinned copper wire braided layer is made of 144 φ0.07mm tinned copper wires, with a unidirectional coverage of not less than 85% and a braiding angle of 20° to 80°. The second tinned copper wire braided layer is made of 96 φ0.07mm tinned copper wires, with a unidirectional coverage of not less than 85% and a braiding angle of 20° to 80°.
[0011] Furthermore, in the aforementioned combined cable for a drag chain system, a first insulation layer is extruded onto the first conductor of the first insulated core wire, the first insulation layer being made of high-density polyethylene material, and a second insulation layer is extruded onto the second conductor of the second insulated core wire, the second insulation layer being made of modified TPE material.
[0012] Furthermore, in the aforementioned combined cable for the cable chain system, both the isolation tape and the wrapping tape are made of non-woven fabric.
[0013] Furthermore, in the aforementioned combined cable for the cable carrier system, both the center filler rope and the gap filler rope are aramid filaments.
[0014] Furthermore, in the aforementioned composite cable for a cable chain system, the sheath is made of modified TPU material.
[0015] The advantages of this invention are as follows: the first and second insulated core wires have sufficient flexibility to avoid breakage or damage due to excessive bending, while also effectively reducing electromagnetic interference during signal transmission, improving signal stability and reliability, and enabling the cable to meet dynamic requirements up to 10 million cycles; the internal impedance of the cable reaches 95Ω~110Ω and the capacitance reaches 40pF / m~50pF / m, thereby effectively preventing the core wires inside the cable from being affected by external magnetic fields, allowing the cable to transmit signals more quickly and accurately. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the combined cable for a cable chain system as described in this utility model. Detailed Implementation
[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.
[0018] like Figure 1 As shown, the combined cable for a drag chain system described in this utility model includes: two signal transmission units 1 and two control units 2. The two signal transmission units 1 and the two control units 2 are twisted into a cable. A center filler rope 3 is filled at the center of the cable, and gap filler ropes 4 are filled between each unit. Both the center filler rope 3 and the gap filler ropes 4 are aramid filaments, which improve the twisting stability between the signal transmission units 1 and the control units 2 and the cable strength. An isolation strip 5 is longitudinally wrapped on the cable of the signal transmission units 1 and the control units 2. The isolation strip 5 is non-woven fabric, and a sheath 6 is extruded on the isolation strip 5. The sheath 6 is made of modified TPU material. Modified TPU not only retains the original excellent properties, such as good mechanical strength, wear resistance, oil resistance, and low temperature resistance, but also significantly improves flexibility and elasticity, making the cable more suitable for application scenarios that require high flexibility and elasticity.
[0019] The signal transmission unit 1 includes two twisted first insulated core wires 11. The twist pitch of the two first insulated core wires 11 is 8 to 12 times the outer diameter of the twisted wires, which ensures that the first insulated core wires 11 maintain sufficient flexibility when bent, avoiding breakage or damage due to excessive bending. It also effectively reduces electromagnetic interference during signal transmission, improving signal stability and reliability. An aluminum-plastic composite tape 12 is longitudinally wrapped around the two twisted first insulated core wires 11. The thickness of the aluminum-plastic composite tape 12 is 0.05 mm, and the longitudinal overlap rate is 20% to 50%. The aluminum-plastic composite tape 12 is woven with... The first tinned copper wire braided layer 13 is composed of 144 φ0.07mm tinned copper wires, with a unidirectional coverage of not less than 85% and a braiding angle of 20° to 80°. By setting the aforementioned aluminum-plastic composite tape 12 and the first tinned copper wire braided layer 13, the impedance of the first insulated core wire 11 can reach 95Ω to 110Ω, and the capacitance can reach 40pF / m to 50pF / m. This effectively prevents the internal core wires of the cable from being affected by external magnetic fields, allowing the cable to transmit signals more quickly and accurately. A first wrapping tape 14, made of non-woven fabric, is wrapped around the braided layer 13. The first wrapping tape 14, combined with the insulating tape 5, prevents the first tinned copper wire braided layer 13 from cutting the sheath 6. Furthermore, the non-woven fabric has high dielectric strength and stable resistivity. The first wrapping tape 14 is wrapped around the first tinned copper wire braided layer 13 of the signal transmission unit 1, and the insulating tape 5 covers the signal transmission unit 1. This double-layer non-woven fabric more effectively prevents current leakage and signal interference. The first conductor 15 in the first insulated core wire 11 is directly twisted from 19 φ0.12mm Category 6 tinned copper monofilaments. The first conductor 15 has a stranding pitch that is 6 to 10 times its outer diameter. This helps to reduce the skin effect and proximity effect inside the first conductor 15, thereby reducing resistance and improving transmission efficiency. It also makes the first insulated core wire 11 more flexible and easier to bend. The first conductor 15 of the first insulated core wire 11 is covered with a first insulation layer 16, which is made of high-density polyethylene. High-density polyethylene is lightweight, corrosion-resistant, and has good buffering and shock-absorbing properties, which can improve the flexibility and bending resistance of the first insulated core wire 11.
[0020] The control unit 2 includes: two twisted second insulated core wires 21, the twist pitch of which is 8 to 12 times the outer diameter of the twisted core wires 21; a second tinned copper wire braided layer 22 is woven on the two twisted second insulated core wires 21, the second tinned copper wire braided layer 22 is woven from 96 φ0.07mm tinned copper wires, the unidirectional coverage of the tinned copper wires is not less than 85%, and the braiding angle of the tinned copper wires is 20° to 80°, which can ensure both the stability of signal transmission of the second insulated core wires 21 and the flexibility of the second insulated core wires 21; a second wrapping tape 23 is wrapped around the second tinned copper wire braided layer 22; and the second conductor 24 in the second insulated core wires 21 is composed of 126 φ0.07mm Category 6 tinned copper monofilaments, each divided into 7 strands and then... The cable is constructed using a 1+6 stranded structure, which ensures the roundness of the second insulated core 21. Each strand carries a smaller current than the second conductor 24. The current is transmitted through the entire second conductor 24, both inside and out, thus reducing the skin effect and resulting in lower current impedance compared to traditional stranding methods. The stranding pitch of the seven strands in the second conductor 24 is 6 to 10 times the outer diameter of the second conductor 24. A second insulation layer 25 is extruded onto the second conductor 24 of the second insulated core 21. The second insulation layer 25 is made of modified TPE material, which has an insulation resistance greater than 200 Ω·kM and a tensile strength greater than 45 MPa. This ensures both the electrical performance of the second insulated core 21 and provides excellent mechanical strength, guaranteeing the safety of the entire cable during later use.
[0021] The stranding direction of the Category 6 tinned copper monofilaments in the first conductor 15, the stranding direction of the Category 6 tinned copper monofilaments in each strand of the second conductor 24, the stranding direction between the 7 strands, the stranding direction of the two first insulated core wires 11 in the signal transmission unit 1, the stranding direction of the two second insulated core wires 21 in the control unit 2, and the stranding direction when the signal transmission unit 1 and the control unit 2 are stranded into a cable are all consistent. When bending, the elongation force and compressive force on each monofilament are equal, the monofilament will not elongate or compress, and the strand will not deform. This structure effectively ensures that the core wires are subjected to uniform stress in later use, preventing damage caused by uneven stress, thereby increasing the dynamic requirements of the cable to 10 million cycles. At the same time, it can also improve the corona phenomenon and improve the electrical performance of the cable. The twisted pitches of the first insulated core wires 11 in the two signal transmission units 1 are different, and the twisted pitches of the second insulated core wires 21 in the two control units 2 are different. The twisted pitches of the first insulated core wires 11 and the second insulated core wires 21 are different, and the twisted pitches between the signal transmission unit 1 and the control unit 2 are different from the twisted pitches of the first insulated core wires 11 and the second insulated core wires 21. This can reduce mutual inductance and capacitance effects, thereby reducing crosstalk and attenuation during signal transmission and improving transmission efficiency.
[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.
Claims
1. A combined cable for a cable chain system, characterized in that: include: Two signal transmission units and two control units are twisted together to form a cable. A central filling rope is filled at the center of the cable, and gap filling ropes are filled between each unit. An isolation strip is longitudinally wrapped around the signal transmission units and control units of the cable, and a sheath is extruded onto the isolation strip. The signal transmission unit includes: two twisted first insulated core wires, the twist pitch of the two first insulated core wires being 8 to 12 times the outer diameter of the twisted wires; an aluminum-plastic composite tape is longitudinally wrapped around the two twisted first insulated core wires; a first tinned copper wire braid layer is woven on the aluminum-plastic composite tape; a first wrapping tape is wrapped around the first tinned copper wire braid layer; and the first conductor in the first insulated core wire is directly twisted together from 19 φ0.12mm Category 6 tinned copper monowires, the twist pitch of the first conductor being 6 to 10 times the outer diameter of the first conductor. The control unit includes: two twisted second insulated core wires, the twisting pitch of the two second insulated core wires being 8 to 12 times the outer diameter of the twisted wires; a second tinned copper wire braid layer is woven on the two twisted second insulated core wires; a second wrapping tape is wrapped around the second tinned copper wire braid layer; the second conductor in the second insulated core wire is formed by dividing 126 φ0.07mm Category 6 tinned copper monowires into 7 strands and then twisting them together in a 1+6 type structure; the twisting pitch of the 7 strands in the second conductor is 6 to 10 times the outer diameter of the second conductor. The twisting direction of the Category 6a tinned copper monofilaments in the first conductor, the twisting direction of the Category 6a tinned copper monofilaments in each strand of the second conductor, the twisting direction between the 7 strands, the twisting direction of the two first insulated core wires in the signal transmission unit, the twisting direction of the two second insulated core wires in the control unit, and the twisting direction when the signal transmission unit and the control unit are twisted into a cable are all consistent.
2. The combined cable for a cable carrier system according to claim 1, characterized in that: The twisted pitch of the first insulated core wires in the two signal transmission units is different. The twisted pitch of the second insulated core wires in the two control units is different. The twisted pitch of the first insulated core wire and the twisted pitch of the second insulated core wire are different. The twisted pitch between the signal transmission unit and the control unit is different from the twisted pitch of the first insulated core wire and the twisted pitch of the second insulated core wire.
3. The combined cable for a cable carrier system according to claim 1, characterized in that: The aluminum-plastic composite belt has a thickness of 0.05mm and a longitudinal overlap rate of 20% to 50%.
4. The combined cable for a cable chain system according to claim 1, characterized in that: The first tin-plated copper wire braided layer is made of 144 φ0.07mm tin-plated copper wires, with a unidirectional coverage of not less than 85% and a braiding angle of 20° to 80°. The second tin-plated copper wire braided layer is made of 96 φ0.07mm tin-plated copper wires, with a unidirectional coverage of not less than 85% and a braiding angle of 20° to 80°.
5. The combined cable for a cable chain system according to claim 1, characterized in that: The first conductor of the first insulated core wire is covered with a first insulating layer made of high-density polyethylene material, and the second conductor of the second insulated core wire is covered with a second insulating layer made of modified TPE material.
6. The combined cable for a cable chain system according to claim 1, characterized in that: Both the isolation tape and the wrapping tape are made of non-woven fabric.
7. The combined cable for a cable carrier system according to claim 1, characterized in that: Both the center filler cord and the gap filler cord are made of aramid filament.
8. The combined cable for a cable chain system according to claim 1, characterized in that: The sheath is made of modified TPU material.