High-flexibility drag chain cable

Abstract

The utility model discloses a high-flexibility drag chain cable which comprises conductors, insulating layers, an inner shielding layer and a total shielding layer. The outer layer of the conductor is coated with a first insulating layer, the periphery of the insulating layer is also coated with an inner shielding layer, the space between the conductor and the inner shielding layer is filled with a second insulating layer, the periphery of the inner shielding layer is provided with a total shielding layer, the space between the total shielding layer and the inner shielding layer is also filled with an inner sheath, and the surface of the total shielding layer is coated with a sheath; the total shielding layer wraps the surface of the inner protection layer in a winding manner; four inner shielding layers are arranged in the inner protection layer, two conductors are arranged in each inner shielding layer, and the first insulating layers on the upper surfaces of the two conductors are arranged at intervals and do not make contact with each other; the surfaces of the four inner shielding layers are mutually contacted; according to the utility model, the arrangement of the conductor wire harnesses in the cable is optimized, so that the processing difficulty is reduced; and meanwhile, the double shielding layers are adopted, so that the electromagnetic shielding effect is more excellent.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a high-flexibility drag chain cable. Background Art

[0002] Cable is a kind of wire that transmits power or information from one place to another. Usually, one or more conductors are coated with an insulating layer to form an insulated core wire, and then two or more insulated core wires are twisted into twisted pairs, and then the twisted pairs are twisted into cable cores. The shielding layer and sheath layer are sequentially coated on the cable core from the inside to the outside, and finally a cable for transmitting power or information is obtained. As a type of cable, flexible drag chain signal cable is mainly used as the main carrier for energy transmission and signal transmission of intelligent machines. In the environment where intelligent machines are used, there is often more complex electromagnetic interference. In order to ensure stable signal transmission, this type of cable needs to have a good shielding effect.

[0003] For example, the patent with authorization announcement number CN208368193U discloses a control cable for a bending fatigue-resistant drag chain, which is composed of a total twisted unit, an inner sheath, a tinned copper wire braided layer, a first outer sheath and a second outer sheath from the inside to the outside. The total twisted unit is formed by multiple single twisted units twisted in the same direction evenly around a nylon rope filling core, wherein each single twisted unit is formed by multiple insulating cable cores twisted in the same direction, and the insulating cable core is composed of aramid yarn, a conductor layer formed by twisting multiple soft copper wires around the aramid yarn, and an insulating layer from the inside to the outside.

[0004] The cable of the above patent is flexible, not easily damaged, and has strong resistance to environmental damage; however, the disadvantage of the above patent is that it uses a single-layer shielding layer, which is prone to deformation when used multiple times, resulting in a decrease in shielding effect.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the utility model is to provide a highly flexible drag chain cable to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A highly flexible drag chain cable comprises a conductor, an insulating layer, an inner shielding layer and a total shielding layer; the outer layer of the conductor is coated with a first insulating layer, the outer periphery of the insulating layer is also coated with an inner shielding layer, and a second insulating layer is filled between the conductor and the inner shielding layer, the outer periphery of the inner shielding layer is provided with a total shielding layer, an inner protective layer is also filled between the total shielding layer and the inner shielding layer, and the surface of the total shielding layer is coated with a sheath; the total shielding layer is wrapped around the surface of the inner protective layer in a winding form; four inner shielding layers are arranged in the inner protective layer, and two conductors are arranged in each inner shielding layer, and the first insulating layers on the upper surfaces of the two conductors are spaced apart and do not contact each other; the surfaces of the four inner shielding layers are in contact with each other, and the inner protective layer is filled between the total shielding layer and the surfaces of the four inner shielding layers; the inner sides of the four inner shielding layers are filled with high-tensile fiber lines, and the high-tensile fiber lines serve as cable reinforcement lines to improve the overall tensile strength of the cable.

[0009] Furthermore, the conductor is a stranded bare copper wire, and may also be a tinned copper wire.

[0010] Furthermore, the first insulating layer is a cross-linked polyolefin insulating material, and the thickness of the first insulating layer is 0.5 mm.

[0011] Furthermore, the second insulating layer is TPE insulating material.

[0012] Furthermore, the inner shielding layer is woven by silver-plated copper wires or tin-plated copper wires, and the diameter of a single copper wire is 0.15 mm.

[0013] Furthermore, the material of the inner protective layer is elastic PVC (polyvinyl chloride) material, and the thickness at the thinnest part is 0.6 mm.

[0014] Furthermore, the overall shielding layer is made of silver-plated copper wire or tin-plated copper wire wrapped around the surface of the inner sheath in a winding form.

[0015] Furthermore, the thickness of the sheath is 0.9 mm and it is a cross-linked polyolefin insulation material.

[0016] Furthermore, the high tensile strength fiber line is specifically a polypropylene fiber material, or a nylon rope.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model optimizes the arrangement of conductor bundles in the cable, uses an inner shielding layer to limit the positions of two conductors, and adopts an inner shielding layer that is closely attached to the surface of the high-tensile fiber line and closely attached to each other. This arrangement reduces the difficulty of processing; at the same time, a double-layer shielding layer is used, and the electromagnetic shielding effect is more excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the structure of a highly flexible drag chain cable.

[0020] Figure 2 A cross-sectional view of a highly flexible drag chain cable.

[0021] Figure 3 This is a front view of a highly flexible drag chain cable. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0023] See also Figure 1-3 A highly flexible drag chain cable comprises a conductor 1, an insulating layer 2, an inner shielding layer 4 and an overall shielding layer 6; the outer layer of the conductor 1 is coated with a first insulating layer 2, the conductor 1 is a stranded bare copper wire, and can also be a tinned copper wire; the first insulating layer 2 is a cross-linked polyolefin insulating material, and the thickness of the first insulating layer 2 is 0.5 mm; the cross-linked polyolefin has the characteristics of high strength, high toughness and wear resistance;

[0024] The outer periphery of the insulating layer 2 is also coated with an inner shielding layer 4, which is woven with silver-plated copper wire or tin-plated copper wire, and the diameter of a single copper wire is 0.15 mm, which plays a shielding role for the internal conductor; and a second insulating layer 3 is filled between the conductor 1 and the inner shielding layer 4, and the second insulating layer 3 is a TPE insulating material; a total shielding layer 6 is arranged on the outer periphery of the inner shielding layer 4, and an inner protective layer 5 is also filled between the total shielding layer 6 and the inner shielding layer 4, and the surface of the total shielding layer 6 is coated with a sheath 7; the material of the inner protective layer 5 is elastic PVC ( The thickness of the thinnest part of the polyvinyl chloride (PVC) material is 0.6 mm; the thickness of the sheath 7 is 0.9 mm, which is a cross-linked polyolefin insulating material; it is also worth noting that four inner shielding layers 4 are arranged in the inner sheath 5, and two conductors 1 are arranged in each inner shield, and the first insulating layers 2 on the upper surfaces of the two conductors 1 are spaced apart and not in contact with each other; the surfaces of the four inner shielding layers 4 are in contact with each other, and the inner sheath 5 is filled between the total shielding layer 6 and the surfaces of the four inner shielding layers 4; the inner sides of the four inner shielding layers 4 are filled with high tensile fiber lines 8,

[0025] The high tensile strength fiber line 8 is used as a cable reinforcement line to improve the overall tensile strength of the cable. The high tensile strength fiber line 8 is specifically made of polypropylene fiber material or nylon rope;

[0026] The overall shielding layer 6 is made of silver-plated copper wire or tin-plated copper wire wrapped around the surface of the inner sheath 5 in a winding form, which plays a secondary shielding role for the multiple conductors inside;

[0027] The minimum bending radius of the finished cable in this solution is 6D, which is 6 times the outer diameter of the cable. It can withstand a reciprocating bending of plus or minus 180 degrees for no less than 5 million times. At the same time, the environmental protection standard complies with the RoHS standard and can be applied to the control connection of the drag chain in the robot arm and the automated assembly line.

[0028] When producing the cable of this scheme, the first insulating layer 2 can be coated on the surface of the twisted bare copper wire, and then the second insulating layer 3 and the inner shielding layer 4 can be coated on the surface of the two conductors attached with the first insulating layer 2, and then the four inner shielding layers 4 and a bundle of high tensile strength fiber wires 8 are tightly attached and then coated with the inner protective layer 5, the overall shielding layer 6 and the sheath.

[0029] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. A highly flexible drag chain cable, comprising a conductor, an insulating layer, an inner shielding layer and an overall shielding layer; the outer layer of the conductor is coated with a first insulating layer, characterized in that: The outer periphery of the insulating layer is also covered with an inner shielding layer, and a second insulating layer is filled between the conductor and the inner shielding layer, a total shielding layer is arranged on the outer periphery of the inner shielding layer, an inner protective layer is also filled between the total shielding layer and the inner shielding layer, and the surface of the total shielding layer is covered with a sheath; the total shielding layer is wrapped around the surface of the inner protective layer in a winding form; four inner shielding layers are arranged in the inner protective layer, and two conductors are arranged in each inner shielding, and the first insulating layers on the upper surfaces of the two conductors are spaced apart and not in contact with each other; the surfaces of the four inner shielding layers are in contact with each other, and the inner protective layer is filled between the surfaces of the total shielding layer and the four inner shielding layers; the inner sides of the four inner shielding layers are filled with high-tensile fiber wires, and the high-tensile fiber wires serve as cable reinforcement wires to improve the overall tensile strength of the cable.

2. A highly flexible drag chain cable according to claim 1, characterized in that: The conductor is a stranded bare copper wire.

3. A highly flexible drag chain cable according to claim 1, characterized in that: The first insulating layer is made of cross-linked polyolefin insulating material, and the thickness of the first insulating layer is 0.5 mm.

4. A highly flexible drag chain cable according to claim 1, characterized in that: The second insulating layer is made of TPE insulating material.

5. A highly flexible drag chain cable according to claim 1, characterized in that: The inner shielding layer is woven from silver-plated copper wires or tin-plated copper wires, and the diameter of a single copper wire is 0.15 mm.

6. A highly flexible drag chain cable according to claim 1, characterized in that: The material of the inner protective layer is elastic PVC material, and the thickness at the thinnest part is 0.6mm.

7. A highly flexible drag chain cable according to claim 1, characterized in that: The overall shielding layer is made of silver-plated copper wire or tin-plated copper wire wrapped around the surface of the inner sheath in a winding form.

8. A highly flexible drag chain cable according to claim 1, characterized in that: The thickness of the sheath is 0.9 mm and it is made of cross-linked polyolefin insulation material.

9. A highly flexible drag chain cable according to claim 1, characterized in that: The high tensile strength fiber line is specifically a polypropylene fiber material, or a nylon rope.

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