Monorail Running Gear Pivot Axis Cornering Dynamics
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Solution Overview
Problem
Existing monorail systems face issues with slow speed, unsuitability for tight cornering, and high mechanical loads due to inadequate running gear design, which affects both capacity and maintenance requirements.
Innovation Solution
The design incorporates a pivot axis connecting pairs of load wheels at right angles to the main direction of travel, allowing for independent alignment and minimizing lateral forces, thereby reducing wear and tear, and featuring a compact, low-maintenance drive system with load wheels and guide wheels for stable guidance and efficient cornering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If load wheels are guided on lateral running surfaces of a T-rail with guide wheels for lateral support, then the carriage achieves compact design and stable guidance, but the monorail runs too slowly and is unsuitable for tight cornering
Solution Approach 1:
The patent applies the dynamics principle by introducing a pivot axis that enables the load wheel pairs to rotate dynamically. This rotation allows the running gear to adapt its orientation to the direction of travel, particularly during cornering maneuvers. The load wheel pairs can pivot independently to align with curved track sections, enabling tight cornering at higher speeds while maintaining the compact T-rail guided structure.
2Speed
If the running gear is designed for high speed and tight cornering, then cornering performance improves, but the running gear is exposed to high mechanical loads and requires more complex construction
Solution Approach 1:
The patent applies segmentation by dividing the running gear into modular components: a carriage body, multiple load wheel pairs, and a pivot axis mechanism. Each load wheel pair can be independently mounted and adjusted, allowing the system to handle high mechanical loads during tight cornering without requiring an entirely complex monolithic structure. The segmented design enables selective reinforcement only where needed.
Solution Approach 2:
The dynamic pivot axis mechanism allows the running gear to automatically adapt to cornering forces. During tight cornering, the load wheel pairs rotate on the pivot axis to align with the curved path, dynamically distributing mechanical loads. This reduces stress on individual components and simplifies the overall construction compared to rigid high-speed designs.
3Quantity of substance
If four load wheels are arranged in pairs with free space for central guide, then load capacity increases, but the running gear experiences high mechanical loads during operation
Solution Approach 1:
The pivot axis mechanism enables dynamic load distribution across the four load wheels. During straight operation, all wheels bear load evenly. During cornering or acceleration, the pivot rotation allows automatic redistribution of forces, preventing any single wheel or axle from承受ing excessive mechanical loads while maintaining high overall load capacity.
Data Source
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AI summary
A running gear (100) for a monorail having a main direction of travel comprises four load wheels, each having a load wheel axle and a free space for a centre guide (220), the four load wheels being arranged in pairs as a coaxially mounted first load wheel pair (111) and second load wheel pair (121), and the free space for a centre guide (220) being formed between the two load wheels of the first load wheel pair (111) and of the second load wheel pair (121). The first load wheel pair (111) is connected to the second load wheel pair via a pivot axis (140) in such a manner that the first load wheel pair (111) can be pivoted relative to the second load wheel pair (121).