Foldable Downhill Bicycle Frame With Tension Rope Support
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Solution Overview
Problem
Mountain bikes designed for downhill riding are heavy and complex, making them unsuitable for hiking and climbing sports due to their bulkiness and weight, which complicates transportation.
Innovation Solution
A lightweight downhill bicycle with a support rod system featuring hinges, a foot rod with a footrest, and a tension rope system that allows for easy unfolding and folding, utilizing lightweight materials like aluminum or carbon fiber composites, and a simple mechanism for stability without complex mechanics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mountain bikes are configured with large dimensioned frames and complex spring systems for robustness and comfort, then the robustness and comfort are improved, but the weight and complexity increase
Solution Approach 1:
The support rod is divided into multiple rod portions (front rod portion, center rod portion, rear rod portion) that can be folded together. This segmentation allows the structure to provide robustness when extended while enabling compact folding for transport, reducing the weight penalty associated with robust construction.
Solution Approach 2:
The support rod transitions from a static rigid structure to a dynamic foldable structure with hinges. This allows the bike to adapt between a robust extended state for downhill riding and a compact folded state for transport, eliminating the need for permanently heavy reinforcement.
2Reliability
If mountain bikes are configured with large dimensioned frames and complex braking systems for robustness and comfort, then the robustness and comfort are improved, but the device complexity increases
Solution Approach 1:
The support rod is segmented into multiple rod portions connected by hinges, allowing the structure to achieve robustness through its extended configuration while enabling compact folding for transport, thereby reducing overall system complexity.
Solution Approach 2:
The support rod transforms from a static rigid structure to a dynamic foldable mechanism with hinges, allowing it to adapt between a robust extended state for downhill riding and a compact folded state for transport, eliminating the need for permanently complex reinforcement systems.
3Reliability
If mountain bikes are designed with heavy robust structures for downhill riding, then the robustness is improved, but the ease of transportation deteriorates
Solution Approach 1:
The support rod is divided into multiple rod portions that can be folded together, allowing the bike to provide robustness when extended for downhill riding while enabling compact folding for easy transportation by hikers or climbers.
Solution Approach 2:
The support rod transitions from a static rigid structure to a dynamic foldable structure with hinges, allowing the bike to adapt between a robust extended state for downhill riding and a compact folded state for easy transportation, thereby improving ease of transportation without sacrificing robustness.
4Reliability
If mountain bikes are configured with complex spring systems for comfort, then the comfort is improved, but the device complexity increases
Solution Approach 1:
The support rod is segmented into multiple rod portions connected by hinges, allowing the structure to provide comfort through controlled movement and energy absorption during folding and extension, while maintaining overall system simplicity.
Solution Approach 2:
The support rod transforms from a static rigid structure to a dynamic foldable mechanism with hinges, allowing it to adapt between a stable extended state for downhill riding and a compact folded state for transport, providing comfort through controlled motion without requiring complex spring systems.
Data Source
AI summary
A bicycle for driving downhill with a front wheel region, a rear wheel region, and a support rod which couples the front wheel region and the rear wheel region, the support rod having at least one hinge for unfolding and folding and has a front rod portion between the front wheel region and the hinge and a rear rod portion between the rear wheel region and the hinge, a foot rod is pivotably mounted with a coupling portion to the support rod and has a footrest region for resting feet of a user of the bicycle, and the bicycle includes a tension rope system having a first rope tensioning portion and a second rope tensioning portion, wherein the first rope tensioning portion is coupled to the foot portion and the front rod portion, and the second rope tensioning portion is coupled to the foot portion and the rear rod portion.