Bicycle Stabilizer Device with Three-Point Hub Fixation
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Solution Overview
Problem
Existing bicycles lack suitable devices to prevent disabled or learning riders from falling off, as conventional accessories either fail to provide adequate stability or are costly and unattractive, and existing solutions cause flexural stress on the bicycle frame or hub, leading to inefficient balance and safety issues.
Innovation Solution
A device with a 'U' shaped structure fitted to the rear of a bicycle, featuring three-point fixation with adjustable cross members, tubular supporting structures, and retractable stabilizer wheels, which distributes stress via tensile strength rather than bending, providing a convenient gripping area and chest support for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If training wheels are fitted near the rear wheel to limit lateral inclination, then the risk of the rider falling off is reduced, but they are not able to guarantee the safety of a rider with coordination problems who moves the upper body shifting the centre of gravity
Solution Approach 1:
The supporting structure is divided into multiple segments: upright portions connected to the rear wheel hub, cross members connecting the upright portions, and a supporting element for chest support. This segmentation allows each component to perform its specific function while collectively providing comprehensive support for riders with coordination problems.
Solution Approach 2:
The invention adds a vertical dimension to the support system by providing upright portions that extend upward from the wheel hub, creating a three-dimensional support structure. This allows the assistant to grip from above and provide support in multiple directions, not just lateral stabilization.
2Device complexity
If fixing means are arranged directly on the frame or hub shaft, then the structure is simple, but flexural stress is applied to the hub shaft or frame causing reliability issues
Solution Approach 1:
Tubular supporting structures serve as intermediaries between the hub shaft and the upright portions. These tubular structures receive the upright portions and transfer loads to the frame through dedicated mounting points, preventing direct flexural stress on the hub shaft while maintaining structural simplicity.
Solution Approach 2:
The fixing means are pre-configured with tubular supporting structures and frame engagement faces that are designed to distribute stresses before they reach the hub shaft or frame. This preliminary stress distribution prevents excessive localized stresses that would compromise reliability.
3Reliability
If special bicycles are produced for disabled persons, then safety and suitability are improved, but the cost increases significantly and the bicycles are unattractive
Solution Approach 1:
The supporting structure is designed as a universal accessory that can be fitted to any commercially available bicycle regardless of type or size. The adjustable cross members and upright portions can be configured to suit different riders, making specialized support available for both disabled persons and learners without requiring custom-built bicycles.
Solution Approach 2:
Instead of creating entirely new specialized bicycles, the invention copies and adapts the essential support functions needed for disabled riders by adding a modular supporting structure to standard bicycles. This approach provides the necessary safety features while maintaining the aesthetic and functional characteristics of ordinary bicycles.
4Ease of operation
If the assistant grips the bicycle at conventional points, then support is provided, but the gripping points are not convenient, safe or easily accessible
Solution Approach 1:
The upright portions extend vertically upward from the wheel hub, creating a new vertical gripping zone that is easily accessible to an assistant standing beside the bicycle. This elevated position allows the assistant to apply support forces from above, improving both convenience and safety compared to gripping at conventional lower points on the bicycle.
Data Source
AI summary
A device for assisting disabled persons or learners to ride a bicycle comprises a structure (S) provided with two portions (1,1') integral with each other at one end and free at the opposite end forming a "U" shape, means for fixing said structure (S) to the bicycle in at least three points, two (10,10') on the rear wheel hub (3) and one (4) directly or indirectly on the bicycle frame; the upright portions (1,1') are interconnected by at least one cross member (7;12) provided with means for adjusting the distance between the same and can be connected to a secondary structure which comprises two supporting wheels (11,11') and means for the height adjustment thereof with respect to the main structure (S).