Pivotable Cable Suspension Reducing Bending Stress
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Solution Overview
Problem
Existing cable suspension fittings are unable to effectively mitigate non-zero deviation angles caused by static and dynamic loads, particularly sway loads, which lead to localized bending and stress in cables.
Innovation Solution
A cable suspension system that allows the cable to pivot about a pivot axis passing through its thickness, incorporating a bracket that can move in both swing and sway planes, coupled with a damping system using elastomeric members to reduce stress and fatigue, thereby maintaining a larger bend radius and minimizing cable bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cable suspension fittings are used, then the cable is supported between poles, but the cable experiences localized bending and non-zero deviation angles that cause stress and fatigue
Solution Approach 1:
The cable suspension fitting incorporates a pivotable body that can rotate about a vertical pivot axis, allowing the fitting to dynamically adjust its orientation in response to swing loads (transverse plane forces). This dynamic capability enables the fitting to maintain the cable in a horizontal plane despite external disturbances, eliminating localized bending and deviation angles that cause stress and fatigue in traditional fixed fittings
Solution Approach 2:
The invention changes the orientation parameter of the cable by using a pivotable body that rotates about a vertical axis. This rotation allows the cable to maintain a horizontal orientation (zero deviation angle) relative to the ground plane, transforming the cable's spatial configuration to eliminate harmful bending stresses while preserving support functionality
2Object-affected harmful factors
If the cable suspension allows multi-directional movement to reduce bending, then cable stress is minimized, but the device complexity increases with pivot mechanisms and damping systems
Solution Approach 1:
The cable suspension fitting is divided into distinct functional segments: a pivotable body for orientation adjustment, a bracket for mounting, and elastomeric damping members for vibration control. This segmentation allows each component to perform its specific function independently, simplifying the overall design while achieving the desired reduction in cable stress through coordinated operation of these modular elements
Solution Approach 2:
Elastomeric damping members are introduced as intermediary elements between the pivotable body and the bracket. These intermediaries absorb vibrational energy and reduce dynamic stresses transmitted to the cable, thereby minimizing cable stress without requiring complex active control systems or sophisticated pivot mechanisms
3Manufacturing precision
If the pivot axis passes through the cable thickness to maintain horizontal plane, then deviation angle is reduced to zero, but the bend radius of the cable increases
Solution Approach 1:
The invention introduces a vertical dimension to the pivot axis, orienting it perpendicular to the cable's longitudinal axis and passing through the cable thickness. This vertical pivot orientation allows the body to rotate in the horizontal plane, maintaining the cable's horizontal alignment (zero deviation angle) while the pivot mechanism's geometry naturally accommodates the cable's bend radius without constriction
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 system effectively reduces cable bending and stress by allowing multi-directional movement, maintaining the cable in a horizontal plane under various load conditions, thus enhancing its durability and performance.
Implementation Method 1
incorporating a bracket that can move in both swing and sway planes, coupled with a damping system using elastomeric members to reduce stress and fatigue
Implementation Method 2
coupled with a damping system using elastomeric members to reduce stress and fatigue
Data Source
AI summary
A cable suspension may allow a cable to be pivoted about a pivot axis that passes through a thickness of a cable. A bend radius of the cable entering and exiting the cable suspension may be increased and/or the degree of bend by a cable entering and exiting the cable support may be decreased. The cable may comprise insulated electrical cables, non-insulated electrical cables (e.g., conductors), shielded cables, non-electrical signal cables (e.g., optical cables), and/or assemblies thereof.