Helical Relief Cable for Railway Installation Friction
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Solution Overview
Problem
The existing methods for installing cables, particularly in complex environments like railway vehicles, are arduous due to high friction between the cable's protective casing and installation zone, requiring significant force and auxiliary equipment like cable pullers, which lengthen installation time and risk damage to the cable.
Innovation Solution
A longitudinal cable with a helical external relief made of low-friction material, such as Teflon, that converts radial forces into axial forces upon rotation, facilitating axial displacement and allowing the cable to circumvent protruding elements, reducing friction and the need for auxiliary equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cable puller is used to install the cable, then the cable can be moved in the installation zone, but the installation time increases and the operation becomes more complex
Solution Approach 1:
The patent removes the cable puller auxiliary equipment from the installation system. Instead of using a separate cable puller device, the cable itself is equipped with a helical relief structure that enables self-propulsion through rotational movement, eliminating the need for external pulling equipment and reducing installation time
Solution Approach 2:
The patent introduces a dynamic helical relief structure on the cable surface that converts rotational motion into axial linear motion. This dynamic mechanism allows the cable to propel itself forward through the installation zone by rotating, transforming the installation process from a linear pulling operation to a rotational self-propulsion operation
2Ease of operation
If a cable puller is used to install the cable, then the cable can be moved, but the device complexity increases
Solution Approach 1:
The patent extracts and eliminates the cable puller from the installation system. The cable is modified with a helical relief structure that provides self-propulsion capability, removing the need for external auxiliary equipment and simplifying the overall installation system
Solution Approach 2:
The cable becomes self-sufficient by incorporating a helical relief structure that enables it to propel itself through rotational movement. The cable no longer requires external assistance from a cable puller, as it can independently move through the installation zone by converting rotation to linear motion
3Speed
If the cable is pulled straight during installation, then the cable can be moved, but the friction between the protective casing and installation zone increases
Solution Approach 1:
The patent transforms the static linear pulling operation into a dynamic rotational self-propulsion operation. The helical relief structure on the cable surface converts rotational motion into axial linear motion, allowing the cable to propel itself forward while reducing friction through the mechanical advantage of the helical geometry
Solution Approach 2:
The patent uses a helical (curved) relief structure on the cable surface instead of a straight cylindrical surface. This curved geometry allows the cable to rotate and convert rotational forces into axial linear motion, reducing friction by distributing contact forces along the helical path rather than concentrating them at a single point
4Adaptability or versatility
If the cable has a standard cylindrical shape, then the manufacturing is simple, but the cable cannot circumvent protruding elements in the installation zone
Solution Approach 1:
The patent modifies only the outer surface of the cable by adding a helical relief structure, while maintaining the standard cylindrical core structure. This localized modification provides obstacle-circumvention capability through rotational movement without fundamentally changing the cable's manufacturing process or core structure
Solution Approach 2:
The patent introduces a helical (curved) relief pattern on the cable surface that enables the cable to rotate and bypass protruding elements. The curved helical geometry allows the cable to navigate around obstacles by converting rotational motion into lateral and axial displacement, providing adaptability while maintaining a relatively simple manufacturing process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The helical relief significantly reduces installation arduousness by enabling easier axial translation and rotation of the cable, minimizing friction and the risk of damage, while eliminating the need for cable pullers, thus shortening installation time and improving operator ease.
Implementation Method 1
the cable can advantageously be put in place like a screw by applying a rotation to one end of the cable, the external helical relief advantageously converting the radial forces into axial forces
Implementation Method 2
the outer relief is made of a material with a low coefficient of friction, in particular Teflon
Data Source
AI summary
A longitudinal cable (3) comprising a protective sheath (30) which includes an external relief (5), said external relief (5) extending helically along the length of said cable (3), said external relief (5) being discontinuous.