Anti-fatigue high speed data cable for mechanical arm

Abstract

The invention discloses an anti-fatigue high speed data cable for a mechanical arm. The cable comprises eight metal conductor units and an aramid reinforcer, wherein the metal conductor units comprise aramid fibers, and first stannum-copper alloy conductors and first oxygen-free copper conductors which are twisted on the external surfaces of the aramid fibers; second stannum-copper alloy conductors and second oxygen-free copper conductors are twisted on the external surfaces of internal conductive layers; a second polytetrafluoroethylene layer longitudinally wraps the external surface of a cable core; a plurality of cotton yarns are filled in gaps between the second polytetrafluoroethylene layer and four symmetric insulated wire pairs; a cotton fiber wire is wound on the external surface of the second polytetrafluoroethylene layer to form a buffer sliding layer; a winding direction of the cotton fiber wire is opposite to twisting directions of the four symmetric insulated wire pairs; a plurality of metal wires are wound on the external surface of the buffer sliding layer side by side to form a metal shielding layer; winding of the metal wires in the metal shielding layer is opposite to that of the cotton fiber wire; and a third polytetrafluoroethylene layer wraps the external surface of the metal shielding layer. The cable is small in friction coefficient, soft and anti-tensile, does not generate friction static, and can still ensure stable structure and electrical performance after frequent movement.

Description

technical field [0001] The invention relates to a data cable, in particular to a fatigue-resistant high-speed data cable for a robotic arm. Background technique [0002] The structure of the traditional shielded data cable is composed of 4 groups of symmetrical signal pairs, wrapped with a layer of polyester tape, and then wrapped with a layer of aluminum-plastic composite tape for shielding, and the outer layer is extruded with PVC or other plastic coating. . Symmetrical signal pair is composed of two insulated wires with copper conductors covered with a layer of high-density polyethylene. The product performance meets the specification requirements of TIA / EIA568B. In order to solve the problem of electrical performance attenuation and electromagnetic interference at lower frequencies, some products are designed to braid a layer of copper wire shielding on the outer layer of the aluminum-plastic composite tape. For shielded data cables that require movement, the conducto...

AI Technical Summary

Problems solved by technology

However, in environments with frequent movements such as robotic arms and relatively harsh environmental conditions, the performance reliability of this type of product cannot meet the requirements. After hundreds of movements, there will be problems such as conductor breakage, increased attenuation, and decreased anti-interference performance.

In the process of moving, there is friction between the insulation, the insulation and the outer tape, and the shield. On the one hand, it is easy to generate static electricity and cause signal interference. At the same time, frequent friction will also cause the mechanical and physical properties of the insulating material to decline.

A general mechanical arm will require more than 100,000 movements. If the influence of the sliding of the cable core structure cannot be solved, the problems of product fatigue resistance and shielding stability cannot be solved, and the signal transmission requirements of the mechanical arm cannot be guaranteed.

At this point, it is difficult for the traditional cable structure to meet the requirements

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