Monorail Rail Section Lower Articulation Longitudinal Force
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Solution Overview
Problem
Existing rail tracks for overhead monorails, particularly E-rails with a simpler T-shaped profile, struggle to effectively absorb large longitudinal forces without complex designs or additional structural support.
Innovation Solution
The rail track design incorporates a lower articulated connection with a minimum cross-section of at least 6 cm², made of steel with a yield strength of at least 300 N/mm², and an axis of rotation offset outside the separation area, distributing longitudinal forces between upper and lower connections to prevent unintended opening or deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If E-rails with simpler T-shaped profile are used, then manufacturing complexity is reduced, but the ability to absorb longitudinal forces deteriorates
Solution Approach 1:
The patent applies parameter changes by increasing the cross-sectional area of the lower articulated connection to at least 6 cm² and specifying steel material with yield strength of at least 300 N/mm². These parameter modifications enable the simpler E-rail structure to absorb longitudinal forces up to 140 kN reliably, resolving the contradiction between structural simplicity and force absorption capability.
2Device complexity
If the axis of rotation is located on the lower edge of the separating area, then the articulated connection structure is simplified, but the reliability against unintended opening deteriorates
Solution Approach 1:
The patent applies dimensionality change by offsetting the axis of rotation from the lower edge of the separating area by at least 5 mm in the longitudinal direction. This spatial repositioning creates a more favorable lever arm arrangement that distributes longitudinal forces between upper and lower connections, preventing torque-induced opening while maintaining structural simplicity.
3Strength
If the cross section of the lower articulated connection is increased to at least 6 cm², then the strength against longitudinal forces is improved, but the material quantity and weight increase
Solution Approach 1:
The patent applies local quality by concentrating the increased cross-sectional area specifically in the lower articulated connection where longitudinal forces are most critical, while the upper articulation maintains a smaller cross-section. This localized reinforcement provides the necessary 140 kN force absorption capability with minimal additional material quantity.
Data Source
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AI summary
Rail section for particularly single-rail hanging tracks, having one or more profile running rails (1) coupled to each other by at least one joint connection (2, 3) each, wherein each profile running rail (1) comprises an upper flange (4) and a lower flange (5). The joint connection (2, 3) comprises a minimum cross section (Q) of at least 6 cm2, particularly at least 7 cm2.