CN113990561A

CN113990561A - Encoder bus cable

Info

Publication number: CN113990561A
Application number: CN202111499957.1A
Authority: CN
Inventors: 赵燕; 刘毅华; 黄振
Original assignee: Guangzhou Star Conduction Technology Co ltd
Current assignee: Guangzhou Star Conduction Technology Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-01-28

Abstract

The invention discloses an encoder bus cable which comprises a main power line, a plurality of linear wires, a plurality of groups of control wires, a plurality of groups of signal wires, a plurality of groups of aramid fiber filling ropes, a thin nylon belting layer, a metal total shielding layer and a protective sheath layer; the main power line, the local line, the control line, the signal line and the aramid fiber filling rope are combined to form a cable pair unit; the thin nylon belting layer is wrapped outside the cable pair forming unit; the metal total shielding layer is coated outside the thin nylon belting layer; the protective sleeve layer is coated outside the metal total shielding layer. The anti-torsion capability, the tensile strength and the anti-interference capability of the encoder bus cable are improved, the chemical resistance and the electromagnetic property of the cable are effectively improved, and the stability of signal transmission is ensured.

Description

Encoder bus cable

Technical Field

The invention relates to the technical field of industrial control automation matching, in particular to a bus cable of an encoder.

Background

The development of modern intelligent automatic chemical control technology drives the rise of various frequency conversion control system supporting industries, the industrial control servo technology is rapidly promoted, the market demand of the supporting encoder is more and more large, and the application field of the encoder covers various fields such as aerospace, ship-mounted, nuclear energy wind energy, geological exploration, high-speed rail vehicles, automobile electronics, intelligent automation, photovoltaic wind energy and the like; the bus cable of the encoder is an important component of the encoder, and the encoder and the bus cable are perfectly matched, so that the operating efficiency of the encoder, such as high resolution, high-speed operation, crosstalk resistance, interference resistance, long-distance transmission and the like, is greatly improved. The encoder bus cable is used as a flexible cable special for connection and transmission control, and can compile and convert signals or data into equipment capable of being used for communication, transmission or storage.

In recent years, the industrial control technology in China is rapidly developed, but most of matched encoder bus cables are imported abroad, and the technology of multifunctional wires with high flexibility, torsion resistance and tensile strength in China is not mature at present.

Therefore, how to obtain a cable for an encoder with excellent performance is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides an encoder bus cable, which includes an encoder bus cable composed of a main power line, a plurality of sets of control lines, a plurality of sets of signal lines, a lapping shielding layer, a drainage line, a plurality of sets of aramid fiber filling ropes, a thin nylon tape layer, a metal total shielding layer and a protective sheath layer; the main power line, the linear lines, the plurality of groups of control lines and the plurality of groups of signal lines form a cable pair unit, a thin nylon belting layer, a metal total shielding layer and a protective sleeve layer are sequentially coated outside the cable pair unit, and aramid fiber filling ropes are filled in the cable pair unit to improve tensile resistance and torsion resistance; the control line and the signal line are wrapped with wrapping shielding layers, so that external signals are protected and shielded from internal signals and are prevented from being leaked and interfered by the internal signals, and drainage is realized by adding a drainage wire in the wrapping shielding layers.

In order to achieve the purpose, the invention adopts the following technical scheme:

a bus cable of an encoder comprises a main power line, a plurality of linear lines, a plurality of groups of control lines, a plurality of groups of signal lines, a plurality of groups of aramid fiber filling ropes, a thin nylon belting layer, a metal total shielding layer and a protective sheath layer; the main power line, the linear line, the control line, the signal line and the aramid fiber filling rope are all soft conductors, and combined bundles form a cable pair unit; the thin nylon belting layer is wrapped outside the cable pair forming unit to be used as a cable forming belting layer; the metal total shielding layer is coated outside the thin nylon belting layer; the protective sleeve layer is coated outside the metal total shielding layer by adopting an extrusion coating process.

Preferably, the thin nylon band layer is made of thin-wall band materials, overlapping covers are adopted, and the thin nylon band layer is wrapped outside the cable pair units to fully play a role in wrapping and tightening.

Preferably, the main power line comprises a line pair consisting of two wire cores twisted in pairs in a color separation manner, and the outside of the line pair is extruded with a flexible insulating layer by adopting an extrusion technology; the wire core of the lead is a conductor formed by twisting tinned soft copper bundles, and the outside of the conductor is extruded with a flexible insulating layer by adopting an extruding technology; the flexible insulating layer is made of flexible TPE insulating material; the aramid fiber filling rope is filled in the main power line and is filled around the wire pairs, so that the filling, rounding and reinforcing effects are fully achieved, and the torsion resistance and the rounding of the main power line are improved.

Preferably, the local line is an insulated wire core with yellow/green double-color identification. The grounding protection function can be realized, the linear line can fully ground the cable, the overlarge current leakage is avoided, and the safety of the bus cable of the encoder is ensured.

Preferably, the control line comprises a wire pair consisting of two wire cores twisted in pairs in a color separation manner, and a lapping shielding layer coated outside the wire pair; a drainage wire is added into the lapping shielding layer; the wire cores in the plurality of groups of control wires are different in pair twist pitch. The control line can realize the electromagnetic active control function of the coding controller connected with the encoder bus cable; the two groups of colored wire cores are twisted in pairs, so that the subsequent wire pairs can be conveniently laid and wired, the connection of symmetrical negative signals can be ensured, the electromagnetic field of the current contributing to the cable is 0, the attenuation is minimum, the low-frequency and magnetic field interference resistance is realized, and the long-distance transmission can be realized. When the group is twisted in pair, aluminum foil is used for wrapping, and a thin copper wire is added during wrapping to serve as the drainage wire, so that good grounding of leakage current is ensured, and signal interference of a signal wire and a control wire is avoided. And the pair twisting with different pitches is adopted, so that the mutual interference of the encoder signal transmission is fully realized, and the signal transmission is ensured to be clear. The number of the control lines is increased or decreased according to the requirements of use conditions.

Preferably, the signal wire comprises a wire pair consisting of two groups of wire cores twisted in pairs in color, and a wrapping shielding layer coated outside the wire pair; and a drainage wire is added in the lapping shielding layer. And the transmission display of signals required by the encoder is realized.

Preferably, the lapping shielding layer is formed by lapping double-sided aluminum foil. And copper wires are added as the drainage wires during wrapping, so that the leakage drainage effect is realized. The wrapping shielding layer can be used for placing a control wire or a signal wire to cause signal interference to the external environment, and meanwhile, the interference of the external signal wire to the control wire or the signal wire can be shielded.

Preferably, the aramid fiber rope is filled according to the technical design requirements of the encoder, specifically, according to the technical design requirements of rounding a bus and resisting tension and durability, the aramid fiber rope is formed by bundling and twisting aramid fiber wires to form a strong flexible reinforced rope, and the high tensile capacity is achieved; the aramid fiber filling rope is added when the cable pair units are formed, the condition that the encoder bus cable can resist more than 800 ten thousand times of twisting without damaging the bus cable can be met. The aramid fiber rope is used for filling the encoder bus cable to be round and enhancing the tensile and torsion strength of the encoder bus cable.

Preferably, the metal total shielding layer is formed by twisting strands of annealed tinned soft fine copper wires and weaving and coating the annealed soft fine copper wires outside the thin nylon belting layer by adopting a weaving technology. The whole encoder bus cable is prevented from being interfered by external electromagnetic interference. The metal total shielding layer not only has the function of shielding external electromagnetic interference, but also has the function of grounding a linear line, so that the safety of the whole cable is ensured.

Preferably, the protective sheath layer is made of a thermoplastic soft-grade mixed TPE (thermoplastic elastomer) sheath material; the protective sleeve layer adopts an extrusion coating technology and is extruded outside the metal total shielding layer.

According to the technical scheme, compared with the prior art, the encoder bus cable is made of specially-made improved propylene or thermoplastic flexible TPE insulating materials, wire pairs with different types, specifications and purposes are preferably adopted, different pitch cabling and shielding technologies are technically designed, the non-interference performance of signal wire pairs and control wire pairs is guaranteed, the bus attenuation is low, and the transmission performance is good. The protective sheath layer is made of halogen-free wear-resistant and fatigue-relieving polyurethane material, and is completely suitable for installation under continuous reciprocating motion, especially frequent bending occasions under the industrial action environment. The encoder bus cable has the excellent characteristics of good flexibility, water resistance, oil resistance, direct light ray prevention, tear resistance, ultraviolet resistance, heat resistance, flame retardance, weather resistance, cold resistance, torsion resistance, wear resistance, scraping resistance, cutting resistance, good insulativity, stable chemical performance and the like, and can bear certain mechanical external force; the encoder bus cable has good electromagnetic property and interference resistance, and can meet the special requirements of resisting torsion of more than 800 ten thousand times and signal control and transmission of the encoder bus cable. The device is suitable for places where the indoor and outdoor environment needs to be shielded, such as drag chain in-and-out logistics systems, control systems, mechanical automation systems, numerical control machines, automotive electronics, hardware stamping, wood and stone machinery, glass and door and window machinery, injection molding machines, mechanical (man) hands, construction machinery, heavy machinery plants, automobile manufacturing, hoisting and transporting equipment, automatic warehouses, docks, fire trucks, rail transit high-speed rail cars, electrical control systems of ships and warships and the like of modern mechanical standard components, and particularly needs stable information conduction and monitoring system supporting facilities without difference and change. The low-attenuation, anti-interference and crosstalk-resistant performance of a cable differential long-distance transmission signal required by the encoder is superior, and the application requirement of a cable matched with a modern encoder is met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a bus cable of a structural encoder according to the present invention.

In the drawings: the cable comprises 1-main power line, 2-linear line, 3-control line, 4-lapping shielding layer, 5-signal line, 6-aramid fiber filling rope, 7-drainage line, 8-thin nylon lapping layer, 9-metal total shielding layer and 10-protective sheath layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention discloses a coder bus cable, which comprises a main power line 1, a local line 2, a plurality of groups of control lines 3, a plurality of groups of signal lines 5, a plurality of groups of aramid fiber filling ropes 6, a thin nylon belting layer 8, a metal total shielding layer 9 and a protective sleeve layer 10; the main power line 1, the local linear line 2, the control line 3, the signal line 5 and the aramid fiber filling rope 6 form a cable pair unit; a thin nylon belting layer 8 is wrapped outside the cable pair forming unit; the metal total shielding layer 9 is coated outside the thin nylon belting layer 8; the protective sheath layer 10 covers the outside of the metal total shield layer 9.

In order to further optimize the technical scheme, the thin nylon belting layer 8 is made of thin-wall belting materials, overlapping covers are adopted, and the thin nylon belting layer is wrapped outside the cable pair units to fully play a role in wrapping and tightening, so that better cabling can be realized, and cables in the cable pair units can be protected.

In order to further optimize the technical scheme, the main power line 1 comprises a line pair consisting of two wire cores twisted in pairs in a color separation manner, and a flexible insulating layer is extruded outside the line pair by adopting an extrusion technology; the wire core of the lead is a conductor formed by twisting tinned soft copper bundles, and the outside of the conductor is extruded with a flexible insulating layer by adopting an extruding technology; the flexible insulating layer is made of flexible TPE insulating material; the aramid fiber filling rope 6 is filled in the main power line 1 and filled around the wire pairs, so that the filling, rounding and reinforcing effects are fully achieved, and the torsion resistance and the rounding of the main power line are improved. The power transmission function can be fully realized.

In order to further optimize the technical scheme, the religious line 2 is an insulating wire core with yellow/green double-color identification and plays a religious grounding role. The cable is fully grounded through the linear wires, excessive leakage current is avoided, the best anti-interference characteristic is achieved, and the safety of the encoder bus cable is ensured.

In order to further optimize the technical scheme, the control line 3 comprises two groups of color twisted wire cores and a wrapping shielding layer 4 wrapping the outside of the wire cores; a drainage wire 7 is added into the lapping shielding layer 4; the wire core pair twist pitches in the plurality of groups of control wires 3 are different. The electromagnetic active control function of the controller is realized; the connection of symmetrical negative signals can be ensured by twisting the two groups of colored wire cores in pairs, so that the electromagnetic field contributed by the current to the cable is 0, the attenuation is minimum, the low-frequency and magnetic field interference resistance is realized, and a longer distance can be transmitted. When the team is twisted in pair, the aluminum foil is adopted for wrapping, and a thin copper wire is added during wrapping to serve as a drainage wire, so that good grounding of leakage current is ensured, and signal interference of a signal wire and a control wire is avoided. And the pair twisting with different pitches is adopted, so that the mutual interference of the encoder signal transmission is fully realized, and the signal transmission is ensured to be clear.

In order to further optimize the technical scheme, the signal wire 5 comprises two groups of wire cores which are twisted in pairs in a color mode and a wrapping shielding layer 4 which is coated outside the wire cores; and a drainage wire 7 is added in the lapping shielding layer 4. And the transmission display of signals required by the encoder is realized.

In order to further optimize the technical scheme, the lapping shielding layer 4 is formed by lapping double-sided aluminum foil. When the package is lapped, a copper wire is added as a drainage wire 7, so that the leakage drainage effect is realized. The control line 3 or the signal line 5 can be placed around the shielding layer 4 to cause signal interference to the external environment, and meanwhile, the interference of the external signal line to the control line 3 or the signal line 5 can be shielded.

In order to further optimize the technical scheme, the aramid rope 6 is formed by bundling and twisting aramid filaments. The strong flexible reinforcing rope is formed, has high tensile strength, and can meet the requirement that the bus cable of the encoder can resist twisting for more than 800 ten thousand times without damaging the bus cable. The aramid fiber rope 6 is used for filling the encoder bus cable to be round and enhancing the tensile and torsion strength of the encoder bus cable.

In order to further optimize the technical scheme, the metal total shielding layer 9 is formed by winding strands of annealed tinned soft fine copper wires and weaving and coating the thin nylon belting layer outside by adopting a weaving technology. The whole encoder bus cable is prevented from being interfered by external electromagnetic interference. The metal total shielding layer 9 not only has the function of shielding external electromagnetic interference, but also has the function of grounding a linear line, so that the safety of the whole cable is ensured.

In order to further optimize the technical scheme, the protective jacket layer 10 is made of a thermoplastic soft-grade mixed TPE (thermoplastic elastomer) jacket material; the protective layer 10 is extruded outside the metal total shielding layer 9 by adopting an extrusion coating technology.

The invention has the beneficial effects that: the main power line, the local line, the control line, the signal line and the aramid fiber rope are combined to form a cable pair unit; the thin nylon band layer is wrapped and tightened; the metal total shielding layer is coated outside the thin nylon belting layer; the protective sleeve layer is coated outside the metal total shielding layer. The cables in the cable pair units are conductors formed by bundling and twisting single thin copper wires or tinned wires respectively, and a layer of thermoplastic flexible TPE insulating material is coated outside the conductors by adopting an extrusion technology to form insulated single wires with the conductors; the insulating single wire with the conductor is twisted in pairs by two groups, the separate shielding is realized by adopting a wrapping shielding layer wrapped by aluminum foil, and a drainage wire is added for drainage protection during the wrapping shielding, so that the grouped cabling is formed, and the cabled pair unit is used as a coder bus cable; during cabling, aramid fiber ropes are added for filling and reinforcing to ensure the integral torsion resistance and tensile strength of the cable, and a thin nylon binding belt is adopted for wrapping and tightening the outside of the cable to form a semi-finished product of the encoder bus cable; and a metal braided total shielding layer is adopted to play a role in total shielding outside the semi-finished product, and a protective sleeve layer made of thermoplastic flexible TPU mixed material is adopted as the outermost layer.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coder bus cable is characterized by comprising a main power line (1), a plurality of linear wires (2), a plurality of groups of control wires (3), a plurality of groups of signal wires (5), a plurality of groups of aramid fiber filling ropes (6), a thin nylon band layer (8), a metal total shielding layer (9) and a protective sleeve layer (10); the main power line (1), the linear line (2), the control line (3), the signal line (5) and the aramid fiber filling rope (6) form a cable pair unit; the thin nylon belting layer (8) is wrapped outside the cable pair forming unit; the metal total shielding layer (9) is coated outside the thin nylon belting layer (8); the protective sleeve layer (10) is coated outside the metal total shielding layer (9).

2. The encoder bus cable according to claim 1, wherein the main power line (1) comprises a line pair consisting of two split twisted conductor wire cores, and the outside of the line pair is extruded with a flexible insulating layer by adopting an extrusion coating technology; the wire core of the lead is a conductor formed by twisting tinned soft copper bundles, and the outside of the conductor is extruded with a flexible insulating layer by adopting an extruding technology; the flexible insulating layer is made of a flexible TPE insulating material; the aramid fiber filling rope (6) is filled in the main power line (1) and is filled around the wire pairs.

3. An encoder bus cable according to claim 1, characterized in that said conductor (2) is a yellow/green two-color-marked insulated wire core.

4. The encoder bus cable according to claim 1, wherein the control line (3) comprises a wire pair consisting of two wire cores twisted in pairs in color separation, and a wrapping shielding layer (4) coated outside the wire pair; a drainage wire (7) is added into the lapping shielding layer (4); the wire cores in the plurality of groups of control wires (3) are different in pair twist pitch.

5. The encoder bus cable according to claim 1, wherein the signal line (5) comprises a pair of two groups of twisted-pair conductor cores, and a wrapping shielding layer (4) coated outside the pair; and a drainage wire (7) is added into the lapping shielding layer (4).

6. The encoder bus cable of claim 1, wherein the aramid fiber filling rope (6) is formed by bundling and twisting aramid fiber wires, and the requirements on the roundness and the torsion resistance of the encoder bus cable are met.

7. An encoder bus cable according to claim 1, characterized in that the metallic total shield (9) is braided outside the thin nylon tape layer (8) using a stranded annealed tin plated soft fine copper wire and using a braiding technique.

8. An encoder bus cable according to claim 1, characterized in that the protective sheath layer (10) is made of thermoplastic soft grade hybrid TPE sheath material; the protective sleeve layer adopts an extrusion coating technology and is extruded outside the metal total shielding layer (9).