Bicycle Trainer Axle Support and Drive Wheel System
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Solution Overview
Problem
Bicycle trainers, whether wheel-off or wheel-on, require significant mechanical aptitude and cause wear on the tire and cassette due to the need for adjustments and engagement of the rear wheel for resistance, which complicates installation and usage.
Innovation Solution
A bicycle trainer system with laterally spaced axle supports that allow the rear wheel to remain on the bicycle without engagement for resistance, bypassing the cassette and using a drive wheel and resistance unit to provide training resistance without tire contact, reducing wear and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rear wheel is engaged with the trainer for resistance, then training function is provided, but wear on the tire and cassette increases
Solution Approach 1:
The patent extracts the resistance function from the rear wheel-tire interface and relocates it to a dedicated resistance unit that engages with a drive wheel. This separation allows the rear wheel to remain stationary without tire wear, while the drive wheel (which can be replaced or is less critical) provides the resistance. The cassette is also bypassed by using a separate drive mechanism, eliminating cassette wear during trainer use.
Solution Approach 2:
The patent introduces a drive wheel as an intermediary component between the bicycle's drivetrain and the resistance unit. The drive chain engages with a cog on the drive wheel, which then transfers power to the resistance unit through a belt or direct engagement. This intermediary drive wheel protects both the tire and cassette from wear while maintaining the training function.
2Reliability
If the rear wheel is removed for wheel-off trainer configuration, then resistance engagement is improved, but installation complexity and time increase
Solution Approach 1:
The patent segments the trainer into distinct functional modules: axle supports for holding the rear wheel stationary, a separate drive wheel mounted on the trainer frame, and a resistance unit. This modular segmentation allows the rear wheel to remain attached to the bicycle without needing to be removed, while the drive wheel provides the resistance interface independently.
Solution Approach 2:
The drive wheel serves multiple functions: it engages with the bicycle's drive chain to receive power, transmits that power to the resistance unit, and can be designed with a tread pattern that provides consistent resistance without requiring tire removal. This multi-functionality simplifies installation while maintaining reliable resistance engagement.
3Reliability
If tire tread pattern is used for resistance interface, then engagement is provided, but noise and wear increase
Solution Approach 1:
Instead of using the bicycle tire's tread pattern for resistance engagement, the patent uses a drive wheel with an optimized tread or surface pattern specifically designed for the trainer interface. This copied interface on the drive wheel provides consistent engagement without the noise and wear issues associated with using the actual bicycle tire, as the drive wheel can be made from durable materials with optimized contact surfaces.
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
The system allows for quick and easy installation of bicycles without adjusting components, reduces wear on tires and cassettes, and eliminates the need for specific trainer tires, enhancing convenience and usability.
Implementation Method 1
A resistance unit is supported by the frame and operably coupled to the drive wheel
Data Source
AI summary
A bicycle trainer includes a frame having a pair of laterally spaced axle supports configured to support a rear wheel axle of a bicycle. The axle supports define a laterally extending first axis. A drive wheel is rotatably supported by the frame, wherein the drive wheel is rotatable about a second axis parallel to, and radially spaced from, the first axis. A resistance unit is supported by the frame and operably coupled to the drive wheel. A bicycle trainer system includes a bicycle having a rear wheel axle removably supported by the axle supports. A method of using the trainer is also provided.