Bicycle Wheel Efficiency Reduction Apparatus for High Cadence Training
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cyclists face challenges in maintaining a slow pace while pedaling at a high speed, particularly when cycling with slower companions or in restricted areas, as existing bicycle systems do not efficiently allow for reduced propulsion efficiency.
Innovation Solution
A low efficiency wheel system comprising an inner and outer wheel with an efficiency reduction apparatus, including reducing drive roller assemblies, idler roller assemblies, and raceway restrictions, which reduces the tangential distance transferred from the inner wheel to the outer wheel, allowing the cyclist to pedal at a high rate while maintaining a slow speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a cyclist pedals at a high rate to maintain training intensity, then the cyclist can achieve high power output, but the bicycle moves at a high speed which is incompatible with cycling with slower companions or in restricted areas
Solution Approach 1:
The wheel system is segmented into two independent wheels: an inner wheel connected to the pedal and an outer wheel in contact with the ground. This segmentation allows the inner wheel to rotate at high speed for training intensity while the outer wheel rotates at low speed for controlled bicycle movement, resolving the contradiction between power output and bicycle speed.
Solution Approach 2:
An efficiency reduction apparatus acts as an intermediary mechanism between the inner wheel and outer wheel. This apparatus includes friction elements and gear systems that deliberately reduce the efficiency of power transmission, allowing the inner wheel's high-speed rotation to be converted into the outer wheel's low-speed rotation, thereby enabling high power output at low bicycle speed.
2Productivity
If the efficiency of power transmission from the inner wheel to the outer wheel is high, then the bicycle moves efficiently, but the cyclist cannot maintain high pedal rate while moving slowly
Solution Approach 1:
The efficiency reduction apparatus incorporates adjustable friction elements and variable gear ratios that allow the cyclist to dynamically control the efficiency of power transmission. This enables the system to adapt between high efficiency mode for speed and low efficiency mode for maintaining high pedal rate at slow speeds, providing versatility in training scenarios.
Solution Approach 2:
The system changes the efficiency parameter of power transmission through adjustable mechanical components. By modifying the friction coefficient or gear ratio in the efficiency reduction apparatus, the cyclist can alter the relationship between pedal rate and bicycle speed, enabling training at specific pedal cadences regardless of ground speed requirements.
3Device complexity
If the inner wheel directly drives the outer wheel with minimal intervention, then the system is simple, but there is no mechanism to reduce the tangential distance transferred and control the speed ratio
Solution Approach 1:
The efficiency reduction apparatus serves as an intermediary mechanism between the inner and outer wheels, providing speed reduction functionality. This apparatus includes friction elements and gear systems that create a controlled speed ratio while maintaining relative system simplicity, allowing the inner wheel to rotate faster than the outer wheel without requiring complex transmission mechanisms.
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
Enables cyclists to pedal with high energy while moving the bicycle at a greatly reduced speed, maintaining a steady and effort-filled pedal rate, by effectively reducing the propulsion efficiency of the wheel system.
Implementation Method 1
reducing drive roller assembly, reducing drive gear assembly, bearing assemblies, raceway restrictions
Implementation Method 2
efficiency reduction apparatus to reduce the efficiency of the inner wheel as it transfers motion to the outer wheel
Data Source
AI summary
A low efficiency wheel system and method, the system includes an inner, propelled wheel and an outer wheel circumferentially adjacent the inner wheel. The system includes an efficiency reduction apparatus located between the inner wheel outer circumferential surface and the outer wheel inner circumferential edge to reduce the efficiency of the inner wheel as it transfers motion to the outer wheel. Such efficiency reduction apparatus may include a reducing drive roller assembly, reducing drive gear assembly, bearing assemblies, raceway restrictions, or combinations thereof.