A CAN-BUS cable for extreme dynamic applications

Abstract

The utility model relates to a kind of cables, especially a kind of CAN-BUS cable of extreme dynamic application.The purpose is to provide a kind of CAN-BUS cable of extreme dynamic application, the cable should have the characteristics of high flexibility, anti-interference, wear resistance, environmental adaptability.The technical scheme is a kind of CAN-BUS cable of extreme dynamic application: including cable core and the inner lining, inner shielding layer, outer shielding layer, wrapping layer and outer sheath layer successively coated cable core from inside to outside;Its characterized in that: the cable core includes several parallelly arranged wires along the length direction of cable;The wire includes conductor and insulating layer coated outside the conductor.

Description

Technical Field

[0001] This utility model relates to a cable, and more particularly to a CAN-BUS cable for extreme dynamic applications. Background Technology

[0002] Controller Area Network (CAN-BUS) cables are primarily used in scenarios requiring real-time communication, flexible topology adjustments, or mobile device connectivity. These applications typically require cables to possess interference immunity, mechanical flexibility, and the ability to adapt to dynamic environments (such as bending, vibration, and temperature changes).

[0003] CN201584216 U discloses a controller area network bus cable, comprising: a copper conductor cable core, the cable core being covered with a polyethylene insulation layer to form an insulated cable core, the insulated cable core and filler core being twisted together to form a cable with a polyester film layer outside, the polyester film layer being covered with a high-density tin-plated copper wire braided shielding layer, and an outermost polyvinyl chloride sheath; to solve the communication needs between large electronic control devices in the modern automotive industry.

[0004] However, this cable only meets basic electrical performance requirements and is insufficient in terms of anti-interference, wear resistance, and environmental adaptability, which need to be improved. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a CAN-BUS cable for extreme dynamic applications. This cable should have the characteristics of high flexibility, anti-interference, wear resistance, and environmental adaptability.

[0006] The technical solution provided by this utility model is:

[0007] A CAN-BUS cable for extreme dynamic applications: comprising a cable core and an inner liner, an inner shield, an outer shield, a wrapping layer, and an outer sheath layer sequentially covering the cable core from the inside out; characterized in that: the cable core comprises a plurality of conductors arranged parallel to each other along the length of the cable; the conductors comprise conductors and an insulating layer covering the outside of the conductors;

[0008] The conductor is a stranded multi-strand copper wire with a tin-plated layer;

[0009] The insulation layer is a three-layer structure consisting of a low-density polyethylene layer, a foamed polyethylene layer, and a cross-linked polyethylene layer arranged sequentially from the inside out.

[0010] The inner lining is made of a thermoplastic elastomer material that combines the properties of both plastics and rubber.

[0011] The inner shielding layer is an aluminum-plastic composite tape wrapping layer; the aluminum-plastic composite tape has a thickness of 0.05mm to 0.06mm, and the aluminum...

[0012] layer

[0013] The thickness is between 38μm and 42μm.

[0014] The outer shielding layer is a tin-plated copper wire braided layer; the tin-plated copper wire has a diameter of 0.10 mm and a braiding density greater than 85%.

[0015] The wrapping layer is a thin non-woven fabric wrapping layer.

[0016] The outer sheath layer is a polyether-type thermoplastic polyurethane elastomer rubber layer; the thickness of the outer sheath layer is 0.80 to 1.0 mm.

[0017] The thickness of the insulation layer is 0.60 to 0.65 mm; wherein the thickness of the foamed polyethylene layer is 10 to 15 times that of the low-density polyethylene layer, and the thickness of the cross-linked polyethylene layer is 0.2 to 0.5 times that of the low-density polyethylene layer.

[0018] The beneficial effects of this utility model are:

[0019] This invention boasts outstanding advantages such as structural stability, flame retardancy, low attenuation, high shielding, high flexibility, anti-interference, wear resistance, and environmental adaptability (e.g., resistance to oil, high and low temperatures, chemical corrosion, excellent mechanical properties, salt spray resistance, mold resistance, and moisture resistance). It withstands temperatures ranging from -50℃ to 85℃ and can withstand long-term use at 80℃. It can be widely applied in industrial automation, robotics, vehicle systems, and other scenarios requiring continuous movement, such as robotic arm joints, cable chain systems, and AGVs (Automated Guided Vehicles). Compared to other conventional extruded insulated communication cables, it is better suited for anti-interference, mechanical flexibility, and adaptability to dynamic environments. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0021] Figure reference numerals: Conductor 1; Low-density polyethylene layer 2; Foamed polyethylene layer 3; Cross-linked polyethylene layer 4; Inner liner 5; Inner shielding layer 6; Outer shielding layer 7; Wrapping layer 8; Outer sheath layer 9. Detailed Implementation

[0022] The embodiments shown in the accompanying drawings will be described in further detail below.

[0023] Figure 1 The CAN-BUS cable for extreme dynamic applications shown includes a cable core and an inner liner, an inner shield, an outer shield, a wrapping layer, and an outer sheath layer that sequentially cover the cable core from the inside out; characterized in that: the cable core includes a plurality of conductors (shown as four conductors in the figure) arranged parallel to each other along the length of the cable; the conductors include conductors and an insulating layer covering the conductors.

[0024] The conductor employs a multi-strand copper wire stranded structure; the copper wire is tin-plated copper wire, with a single wire outer diameter of 0.08 mm and a plating thickness > 0.5 μm, conforming to GB / T 4910 and ASTM B 33. Through the fine-wire multi-strand stranded structure, compared to conventional concentric stranded conductors, its single wires are thinner, the number of strands is greater, and the multi-strand stranding and compression method results in a conductor roundness similar to a single conductor, significantly improving its flexibility and allowing for a smaller bending radius. The physical arrangement structure provides better roundness, and the rounded conductor structure contributes to better attenuation uniformity, making it more suitable for operation in environments with small bending radii.

[0025] The insulation layer is a three-layer structure consisting of a low-density polyethylene layer 2, a foamed polyethylene layer 3, and a cross-linked polyethylene layer 4 arranged sequentially from the inside out. It adopts a three-layer physical nitrogen foaming extrusion process (existing process) for low-density polyethylene, foamed polyethylene, and cross-linked polyethylene, and the three layers are co-extruded in one step. During the extrusion process, parameters such as wire diameter, eccentricity, capacitance in water, and mechanical properties of the insulation process are controlled to achieve the foaming stability of the product. The dielectric constant ε of the modified product is controlled at around 1.7, and its standard impedance is controlled at 120Ω to ensure signal integrity.

[0026] In the three-layer co-extruded structure of the integral insulation, the thickness of the foamed polyethylene layer (i.e., the radial dimension of the foamed polyethylene layer) is 10-15 times that of the low-density polyethylene layer, and the thickness of the cross-linked polyethylene layer is 0.2-0.5 times that of the low-density polyethylene layer. The lightweight and mechanical strength can be balanced by the controllable foaming rate (usually 30% to 70%), thus maintaining the mechanical strength. The integral foaming also reduces the weight, lowers the dielectric constant, improves high-frequency signal transmission performance, and enhances flexibility. The foamed material is softer and suitable for dynamic bending applications. The cells of the physical foam are more uniform and delicate, avoiding the surface roughness or pores that may occur with chemical foaming. Moreover, the outermost layer of this insulation is designed to use cross-linked polyethylene material, which has higher hardness and better wear resistance than conventional high-density polyethylene material, making it more suitable for dynamic bending environments.

[0027] The three-layer co-extrusion process is characterized by lightweight design, optimized dielectric properties, and environmental friendliness, making it the preferred process for high-end cables, data communications, and automotive applications. Its core value lies in balancing high performance with low cost.

[0028] The inner liner 5 is made of thermoplastic elastomer material, which combines elasticity and flexibility and is softer than TPEE made of polyester. The extrusion thickness is controlled at about 0.1mm. The extrusion of the inner liner completely covers the cable core, ensuring the stability of the cable core's data during bending and movement. Compared with the wrapping and protection structure used in conventional cabling processes, this structure is more stable and less prone to breakage during dynamic applications, thus stabilizing the transmission performance of the cable core.

[0029] The inner shielding layer 6 is an aluminum-plastic composite tape wrapping layer; the aluminum-plastic tape has a thickness of 0.05mm to 0.06mm, and its aluminum layer thickness is 38μm to 42μm. The wrapping structure, with an overlap rate of 30% to 35%, completely covers and controls the cable core, achieving a better shielding effect. Compared to longitudinal or drag wrapping structures, the wrapping structure is more conducive to dynamic bending and can control the risk of breakage after bending.

[0030] The outer shielding layer 7 is made of tin-plated copper wire braid: the tin-plated copper wire has a diameter of 0.10 mm and a braiding density greater than 85%. The outer shielding layer is bonded to the inner shielding layer aluminum-plastic composite strip, which can achieve better shielding effect. The combined inner and outer shielding structure can effectively resist external electromagnetic interference and is suitable for strong interference environments such as industrial environments.

[0031] The wrapping layer 8 is a thin non-woven fabric wrapping layer to protect the embedded outer sheath material and ensure peelability.

[0032] The outer sheath layer 9 is made of polyether-type thermoplastic polyurethane elastomer rubber material. This material has excellent softness (Shore A 85-90), high elasticity (elongation greater than 400%, excellent resilience, suitable for dynamic bending applications), excellent abrasion resistance, oil and solvent resistance, excellent low temperature performance (remains flexible even at -40℃ for long-term use), high mechanical strength, weather resistance (resistant to UV and ozone aging, suitable for long-term outdoor use), and hydrolysis resistance. Stable wire diameter control is achieved by adjusting the appropriate compression ratio screw, temperature control, and take-up and unwinding tension during the extrusion process. The use of this type of material gives the cable high elasticity, high strength, abrasion resistance, oil resistance, and ease of processing, making it the first choice for high-end elastomers, which is perfectly reflected in its application in industrial robots / robotic arms and automated production lines.

[0033] The structural design of this product enables it to achieve excellent dynamic bending characteristics, with a bending radius of less than 10D, a speed of 5m / s, and an acceleration of 20m / s². 2 In environments with a travel distance of 20m, it can achieve a performance of over 10 million cycles, and during this process, it can be used in extreme dynamic environments and conduct stable data transmission. This type of dynamic CAN bus cable, through optimized materials and structure, solves the problems of easy breakage and signal attenuation of traditional cables in motion scenarios, becoming a key component of Industry 4.0 and intelligent equipment.

[0034] All components and materials in this invention can be purchased externally.

[0035] The above is a detailed description of a CAN-BUS cable for extreme dynamic applications provided by this utility model. For general manufacturers in the field, there will be changes in the specific implementation methods and application scope based on the ideas and principles of the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A CAN-BUS cable for extreme dynamic applications: comprising a cable core and, from the inside out, an inner liner layer (5), an inner shielding layer (6), an outer shielding layer (7), a wrapping layer (8), and an outer sheath layer (9) sequentially covering the cable core; characterized in that: The cable core includes a plurality of conductors arranged in parallel along the length of the cable; the conductors include a conductor (1) and an insulating layer covering the outside of the conductor; The conductor is a stranded multi-strand copper wire with a tin-plated layer; The insulation layer is a three-layer structure consisting of a low-density polyethylene layer (2), a foamed polyethylene layer (3), and a cross-linked polyethylene layer (4) arranged sequentially from the inside out. The inner lining is made of a thermoplastic elastomer material that combines the properties of both plastics and rubber.

2. The CAN-BUS cable for extreme dynamic applications according to claim 1, characterized in that: The inner shielding layer is an aluminum-plastic composite tape wrapping layer; the aluminum-plastic composite tape is 0.05mm thick. ～ 0.06mm, aluminum layer thickness is 38μm ～ 42μm.

3. The CAN-BUS cable for extreme dynamic applications according to claim 2, characterized in that: The outer shielding layer is a tin-plated copper wire braided layer; the tin-plated copper wire has a diameter of 0.10 mm and a braiding density greater than 85%.

4. The CAN-BUS cable for extreme dynamic applications according to claim 3, characterized in that: The wrapping layer is a thin non-woven fabric wrapping layer.

5. The CAN-BUS cable for extreme dynamic applications according to claim 4, characterized in that: The outer sheath layer is a polyether-type thermoplastic polyurethane elastomer rubber layer; the thickness of the outer sheath layer is 0.80 to 1.0 mm.

6. The CAN-BUS cable for extreme dynamic applications according to claim 5, characterized in that: The thickness of the insulation layer is 0.60 to 0.65 mm; wherein the thickness of the foamed polyethylene layer is 10 to 15 times that of the low-density polyethylene layer, and the thickness of the cross-linked polyethylene layer is 0.2 to 0.5 times that of the low-density polyethylene layer.

Images