Auxiliary Rolling Tracks for Cable Transportation Shoe
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Solution Overview
Problem
Cable transportation systems face issues with the pinching of metal supporting cables due to the downward pull exerted by haul cables, leading to potential damage and safety concerns.
Innovation Solution
The system incorporates a shoe with auxiliary rolling tracks that are concave or convex in cross-section, allowing the trolley roller to maintain extended contact with the supporting cable, reducing stress and eliminating pinching, and includes an elastic connection between the shoe's flanks and central body to absorb shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the trolley roller pinches the supporting cable against the shoe to prevent deformation, then the supporting cable is prevented from flexing or deforming towards the haul cable, but the supporting cable is subjected to severe stress that could damage it and impair safety
Solution Approach 1:
The patent introduces auxiliary rolling tracks as an intermediary element between the trolley roller and the supporting cable. These tracks guide the roller in a specific trajectory that maintains contact with the supporting cable without allowing direct pinching against the shoe, thus preventing severe stress concentration on the cable while still maintaining system reliability
Solution Approach 2:
The auxiliary rolling tracks are designed with concave or convex cross-sections that create a curved rolling path for the trolley roller. This curvature ensures the roller maintains extended contact with the supporting cable in a controlled manner, distributing stress along the cable length rather than concentrating it at a single pinching point
2Stability of the object's composition
If the supporting cable is pinched between the trolley roller and the shoe, then the supporting cable is prevented from flexing or deforming towards the haul cable, but extensive contact between the trolley roller and shoe is reduced
Solution Approach 1:
The patent transitions from direct linear contact between the roller and shoe to contact through an intermediate dimensional path defined by the auxiliary rolling tracks. The concave or convex cross-sections of these tracks create a three-dimensional rolling trajectory that increases the effective contact area between the roller and the shoe structure while maintaining cable position stability
3Reliability
If the supporting cable is prevented from flexing or deforming towards the haul cable, then the cable transportation system operates safely, but the supporting cable is subjected to severe stress in the long term
Solution Approach 1:
The auxiliary rolling tracks serve as a mediating structure that allows the trolley roller to interact with the supporting cable in a controlled manner. This intermediary mechanism prevents direct pinching stress while maintaining the cable's positional stability, thereby extending the supporting cable's service life without compromising system safety
Solution Approach 2:
The patent changes the interaction parameters between the trolley roller and supporting cable by introducing the auxiliary rolling tracks with specific concave or convex profiles. This modifies the stress distribution parameters along the cable, reducing peak stresses while maintaining adequate contact for stable operation over extended periods
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
This design minimizes stress on the supporting cable, ensures extensive contact between the trolley roller and shoe, and dampens shocks, enhancing the safety and reliability of the cable transportation system.
Implementation Method 1
The roller is designed to roll in extended contact along at least one of the auxiliary rolling tracks of the shoe and comprising a concave central race complementary to the rolling track of the supporting cable
Implementation Method 2
the flanks and the central body being connected elastically, so the roller can roll simultaneously along the auxiliary rolling tracks and the rolling track
Data Source
Figure 1~2
Figure 3~15
Figure 6~8
AI summary
A cable transportation system, with at least one supporting cable (2) and a haul cable (3), has at least one shoe (13) for supporting a section of the supporting cable (2); and at least one trolley (4) having at least one roller (8) by which to roll along the supporting cable (2), which defines a rolling track (17) for the roller (8); and wherein the shoe (13) defines two auxiliary rolling tracks (18), which are parallel to the rolling track (17), are located on opposite sides of the supporting cable (2), and are curved in cross-section; the roller (8) being designed to roll in extended contact along at least one of the auxiliary rolling tracks (18) of the shoe (13).