Torsion-resistant and high-toughness cable

Abstract

This application relates to a torsion-resistant, high-toughness cable, comprising an innermost central flexible carrier with several axially symmetrically distributed sockets on the central flexible carrier. Each socket is wrapped with an insulation layer, and the conductor passes through the socket. A wrapping layer is wrapped around the central flexible carrier, and an inner sheath is wrapped around the wrapping layer. An inner shielding layer and an outer shielding layer, made of braided metal wire, are wrapped around the inner and outer shielding layers. An elastic layer is disposed between the inner and outer shielding layers, and the elastic layer has elastic components that can be inserted into the inner and outer shielding layers. A nylon extrusion layer is wrapped around the outer shielding layer, and an outer sheath is wrapped around the nylon extrusion layer. This application enhances the cable's torsional resistance by dispersing torsional or bending forces through the central flexible carrier. The elastic layer improves the torsional and bending resistance of the inner and outer shielding layers.

Description

Technical Field

[0001] This application relates to a cable, and more particularly to a torsion-resistant and high-toughness cable. Background Technology

[0002] Flexible cables are the preferred cable for power transmission and signal transmission in cable chain motion systems. They are also known as cable chains, drag cables, mobile cables, and robot cables. The conductor structure of flexible cables primarily follows the stranded copper conductor structure of DIN VDE 0295 and IEC 228 standards. The sheath often uses low-viscosity, flexible, and abrasion-resistant materials to reduce wear during continuous reciprocating movement. Simultaneously, the cable needs to possess high flexibility, torsional resistance, and bending resistance.

[0003] The following defects exist in existing cables: First, the cable shielding layer is the most prone to breakage. This is because the shielding layer is woven from copper wire or tinned copper wire. Its braiding structure is prone to stress concentration in the bending or twisting part when the whole is twisted, which can cause the copper wire to break or loosen and become damaged, leading to the failure of the shielding layer at that point. At the same time, the broken copper wire may also cause the phenomenon of spike partial discharge.

[0004] Secondly, the cable core is composed of multiple sets of adjacent cores, which are arranged in an axisymmetric manner. This means that when the cable is twisted, the twisted cores cannot release stress outward due to the obstruction of adjacent cores, thus reducing the service life.

[0005] Therefore, it is necessary to design a torsion-resistant and high-toughness cable that can improve torsional and bending resistance. Summary of the Invention

[0006] The purpose of this application is to provide a torsion-resistant, high-toughness cable with improved torsional and bending resistance.

[0007] This application is implemented as follows: The torsion-resistant and high-toughness cable includes a central flexible carrier located at the innermost layer. Several sockets are symmetrically distributed on the central flexible carrier. Each socket is wrapped with an insulation layer. The wire core passes through the socket. A wrapping layer is wrapped around the central flexible carrier. An inner sheath is wrapped around the wrapping layer. An inner shielding layer and an outer shielding layer made of metal wire are wrapped around the inner sheath. An elastic layer is provided between the inner shielding layer and the outer shielding layer. The elastic layer has elastic components that can be inserted into the inner shielding layer and the outer shielding layer. A nylon extrusion layer is wrapped around the outer shielding layer. An outer sheath is wrapped around the nylon extrusion layer.

[0008] Furthermore, the central flexible carrier includes a body with several insertion ports symmetrically distributed along the edge of the body. The edges of the body between two adjacent insertion ports are recessed inward, and a reserved cavity is formed between the recess and the inner wall of the wrapping layer.

[0009] Furthermore, the inner and outer shielding layers are mesh structures with spaced openings, woven from copper wire or tin-plated copper wire.

[0010] Furthermore, the elastic component includes a plurality of upper plugs spaced apart on the outer surface of the elastic layer and a plurality of lower plugs spaced apart on the inner surface of the elastic layer. Each upper plug is inserted into a corresponding mesh on the outer shielding layer, and each lower plug is inserted into a corresponding mesh on the inner shielding layer.

[0011] By implementing the above technical solution, this application uses a central flexible carrier to separate and support different cores. When the cable twists or bends, the central flexible carrier can disperse the torsional or bending force, thereby enhancing the cable's torsional resistance. The elastic layer improves the radial stress release capability of the inner and outer shielding layers, and the elastic components improve the circumferential stress release capability of the inner and outer shielding layers, thereby improving the torsional and bending resistance of the inner and outer shielding layers. Compared to cables in the prior art, this application has stronger torsional and bending resistance. Attached Figure Description

[0012] The specific structure of this application is given by the following figures and embodiments:

[0013] Figure 1 This is a schematic diagram of the structure of this application;

[0014] Figure 2 This is a schematic diagram of the structure of the inner shielding layer and the elastic component of this application;

[0015] Figure 3 This is a schematic diagram of the structure of the elastic layer and the elastic component;

[0016] Figure 4 This is a structural diagram when an active conductor is added.

[0017] Legend: 1. Elastic layer, 2. Outer shielding layer, 2-1. Mesh, 3. Inner shielding layer, 4. Nylon extrusion layer, 5. Outer sheath, 6. Elastic component, 6-1. Upper plug, 6-2. Lower plug, 7. Socket, 8. Insulation layer, 9. Central elastic carrier, 10. Inner sheath, 11. Wrapping layer, 12. Reserved cavity, 13. Movable core. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0024] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0025] Example: Figure 1-4 As shown, the torsion-resistant high-toughness cable includes a central flexible carrier 9 located at the innermost layer. Several sockets 7 are symmetrically distributed on the central flexible carrier 9. Each socket 7 is wrapped with an insulation layer 8. The wire core passes through the socket 7. A wrapping layer 11 is wrapped around the central flexible carrier 9. An inner sheath 10 is wrapped around the wrapping layer 11. An inner shielding layer 3 and an outer shielding layer 2 made of metal wire are wrapped around the inner sheath 10. An elastic layer 1 is provided between the inner shielding layer 3 and the outer shielding layer 2. The elastic layer 1 has an elastic component 6 that can be inserted into the inner shielding layer 3 and the outer shielding layer 2. A nylon extruded layer 4 is wrapped around the outer shielding layer 2. An outer sheath 5 is wrapped around the nylon extruded layer 4.

[0026] The inner sheath 10 and the outer sheath 5 can be made of PVC (polyvinyl chloride), PE (polyethylene) or PUR (polyurethane). The inner sheath 10 is extruded on the outside of the wrapping layer 11, which can provide insulation protection for the inner space and can also serve as the structural support of the innermost layer of the cable, ensuring that the cable maintains its overall performance under mechanical actions such as bending and stretching.

[0027] Furthermore, the central flexible carrier 9 includes a body, with a plurality of insertion ports 7 symmetrically distributed along the edge of the body. The edges of the body between each pair of adjacent insertion ports 7 are recessed inward, and a reserved cavity 12 is formed between the recess and the inner wall of the wrapping layer 11. The movable core 13 can be placed in the reserved cavity 12.

[0028] The central flexible carrier 9 is made by extruding and continuously vulcanizing high-strength ethylene propylene rubber (EPDM). Specifically, high-strength ethylene propylene rubber (EPDM) is a synthetic rubber copolymerized from ethylene, propylene, and a small amount of non-conjugated diene monomers (such as ethylene-1,4-norbornene and 1,4-hexadiene). The specific preparation method is not the focus of this application and will not be described in detail here.

[0029] The central flexible carrier 9 forms a separation support for different conductors. When the cable twists or bends, the central flexible carrier 9 can disperse the torsional or bending force, thereby enhancing the cable's anti-torsion performance.

[0030] Furthermore, the inner shielding layer 3 and the outer shielding layer 2 are mesh structures woven from copper wire or tin-plated copper wire with spaced mesh 2-1.

[0031] Furthermore, the elastic component 6 includes a plurality of upper plugs 6-1 spaced apart on the outer surface of the elastic layer 1 and a plurality of lower plugs 6-2 spaced apart on the inner surface of the elastic layer 1. Each upper plug 6-1 is inserted into a corresponding mesh 2-1 on the outer shielding layer 2, and each lower plug 6-1 is inserted into a corresponding mesh 2-1 on the inner shielding layer 3.

[0032] The elastic layer 1 can be made of solid foam or rubber, which has good elasticity and compressibility, and can provide space for the movement of the inner shielding layer 3 and the outer shielding layer 2.

[0033] The elastic component 6 can be made of conductive foam strips or semi-conductive rubber strips. The elastic component 6 can give the inner shielding layer 3 and the outer shielding layer 2 a large deformation without reducing the shielding coverage area. When the inner shielding layer 3 and the outer shielding layer 2 are under torsion or bending conditions, the elastic component 6 is compressed and deformed, which releases the stress of the inner shielding layer 3 and the outer shielding layer 2. This can improve the torsion and bending resistance of the inner shielding layer 3 and the outer shielding layer 2, and extend the service life of the inner shielding layer 3 and the outer shielding layer 2.

[0034] This application utilizes a central flexible carrier 9 to separate and support different wire cores. When the cable twists or bends, the central flexible carrier 9 can disperse the torsional or bending forces, thereby enhancing the cable's torsional resistance. The elastic layer 1 improves the radial stress release capability of the inner shielding layer 3 and the outer shielding layer 2, while the elastic component 6 improves the circumferential stress release capability of the inner shielding layer 3 and the outer shielding layer 2, thus enhancing the torsional and bending resistance of the inner shielding layer 3 and the outer shielding layer 2. Compared to cables in the prior art, this application exhibits stronger torsional and bending resistance.

[0035] The above technical features constitute the embodiments of this application, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A torsion-resistant and high-toughness cable, characterized in that: It includes a central flexible carrier located at the innermost layer, on which several sockets are symmetrically distributed. Each socket is wrapped with an insulating layer, and the wire core passes through the socket. The central flexible carrier is wrapped with a wrapping tape layer, which is wrapped with an inner sheath. The inner sheath is wrapped with an inner shielding layer and an outer shielding layer made of metal wire. An elastic layer is provided between the inner and outer shielding layers. The elastic layer has elastic components that can be inserted into the inner and outer shielding layers. The outer shielding layer is wrapped with a nylon extrusion layer, which is wrapped with an outer sheath.

2. The torsion-resistant and high-toughness cable according to claim 1, characterized in that: The central flexible carrier includes a body with several slots symmetrically distributed along the edge of the body. The edges of the body between two adjacent slots are recessed inward, and a reserved cavity is formed between the recess and the inner wall of the wrapping layer. A movable core can be placed in the reserved cavity.

3. The torsion-resistant and high-toughness cable according to claim 1, characterized in that: The inner and outer shielding layers are mesh structures with spaced openings, woven from copper wire or tin-plated copper wire.

4. The torsion-resistant and high-toughness cable according to claim 3, characterized in that: The elastic component includes multiple upper plugs spaced apart on the outer surface of the elastic layer and multiple lower plugs spaced apart on the inner surface of the elastic layer. Each upper plug is inserted into a corresponding mesh on the outer shielding layer, and each lower plug is inserted into a corresponding mesh on the inner shielding layer.

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