Bicycle Mounting Device for Roller Trainer Force Distribution
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Solution Overview
Problem
Existing cycling training devices, such as roller trainers, can cause damage to expensive bicycles with carbon frames due to torsional forces when pedaling vigorously, as they do not allow for lateral deflection and require removal of the rear wheel for attachment, which is inconvenient and risky for high-end bikes.
Innovation Solution
A device with mounting elements similar to bicycle frame dropouts that connects to a roller trainer, allowing for immobile training without the need to remove the rear wheel, featuring a power-transfer mechanism like a chain or toothed belt, and adjustable components like a saddle and handlebar, designed to securely transmit forces to the floor and roller trainer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bicycle frame is directly clamped into a roller trainer, then the bicycle can be used for immobile training, but strong forces and torsional movements can damage the dropouts and frame
Solution Approach 1:
The patent introduces an intermediary device that acts as a mediator between the bicycle frame and the roller trainer. This device includes a mounting structure with clamp elements that attach to the seat tube and bottom bracket area, creating a buffer zone that prevents direct force transmission to the vulnerable dropout areas. The intermediary structure absorbs and redistributes the forces generated during vigorous pedaling, protecting the original bicycle frame from damage.
Solution Approach 2:
The mounting device is segmented into multiple independent attachment points (seat tube clamp and bottom bracket clamp) rather than a single rigid connection. This segmentation allows each clamp to independently handle specific force vectors, distributing the mechanical loads away from the dropouts and preventing concentrated torsional stresses that would damage the frame.
2Ease of operation
If the rear wheel is removed for attachment to the roller trainer, then the bicycle can be used for training, but the process is inconvenient and risky for expensive bikes
Solution Approach 1:
The mounting device is pre-assembled with all necessary clamp elements, adjustment mechanisms, and connection components before being brought to the bicycle. This preliminary preparation eliminates the need for on-the-spot wheel removal and frame modification, allowing users to simply attach the pre-configured device to the bicycle's seat tube and bottom bracket areas, reducing both time and risk.
3Stability of the object's composition
If the bicycle is firmly clamped to prevent lateral movement, then stable training is achieved, but torsional forces are transmitted to the floor and frame causing damage
Solution Approach 1:
The mounting clamps are designed with dynamic characteristics that allow controlled movement and compliance. The clamp elements can flex and adjust within certain limits, absorbing torsional forces through elastic deformation rather than rigidly transmitting them to the frame and floor. This dynamic behavior maintains training stability while protecting the bicycle structure.
Data Source
AI summary
With a device for a person to sit on for training purposes for executing a leg rotation movement similar to cycling, with a saddle and a bottom bracket bearing, it is provided that it comprises at least one mounting element for immobile mounting and that it has connecting sections similar to dropouts for connection to a roller trainer.