Three-Wheel Pedal Vehicle With Weight-Shift Steering Stability
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Solution Overview
Problem
Traditional pedal vehicles are not suitable for all users, particularly those with stability issues, and are often bulky and difficult to transport due to their size and require significant pedaling effort.
Innovation Solution
A three-wheeled vehicle with a steering mechanism that allows wheel inclination and curvature through user weight shifting, featuring a compact design with a large front wheel and adjustable saddle for easy maneuverability and transportability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional pedal vehicles are designed with standard wheel sizes and frame structures, then they provide basic mobility, but they become bulky and difficult to transport
Solution Approach 1:
The vehicle frame is divided into modular components that can be easily detached and folded. The supporting body separates into distinct sections allowing compact folding, while the wheel assemblies remain as independent units that can be quickly attached and detached for transport.
Solution Approach 2:
The folding mechanism allows the vehicle to nest into a compact configuration where the supporting body folds into itself and the overall structure reduces to a small package that fits in standard transport containers, dramatically reducing the volume occupied during storage and transport.
2Ease of operation
If foldable pedal vehicles use small wheels to achieve compact size, then they become easier to transport, but they require considerable pedaling effort and are difficult to use
Solution Approach 1:
The vehicle employs different wheel sizes at different locations: large front wheel for reduced pedaling effort and improved stability, and smaller rear wheels for compactness. This local differentiation allows the vehicle to simultaneously achieve ease of pedaling and compact transportable size.
Solution Approach 2:
The vehicle achieves compactness not by uniformly reducing all dimensions, but by optimizing the spatial arrangement where the large front wheel provides functional benefits while the overall length and height are reduced through clever frame geometry and folding mechanisms, effectively using dimensional optimization rather than simple scaling down.
3Reliability
If classic bicycles are used for city transport, then they provide efficient mobility, but they are not suitable for users with stability problems
Solution Approach 1:
The vehicle uses an asymmetric three-wheel configuration with a single front wheel and two rear wheels. This asymmetric arrangement provides inherent stability through the wide rear track width while maintaining the adaptability of a compact, foldable design suitable for various users including those with stability concerns.
Solution Approach 2:
The vehicle design incorporates adjustable features including variable saddle height and adjustable handlebars that can be customized to accommodate users of different sizes and abilities. The three-wheel stable platform combined with these adjustable elements creates a universal vehicle suitable for diverse user groups including those with stability problems.
4Ease of operation
If pedal vehicles are designed for compactness, then they become easier to transport, but they often require special driving or pedaling skills
Solution Approach 1:
The vehicle incorporates self-stabilizing characteristics through its three-wheel geometry and center of gravity positioning, allowing it to maintain balance automatically without requiring active steering corrections or special balancing skills from the rider. The weight-shift steering mechanism also operates intuitively, reducing the skill level needed for effective control.
Data Source
AI summary
A vehicle with pedals (100,200) for a rider comprising: a saddle (1); a front wheel (2); a supporting body (6) or a tubular frame (70); a pair of pedals (5, 5′); a pair of rear wheels (3, 3′); a steering mechanism (4, 50) integral to the supporting body (6) or the tubular frame (70). The mechanism (4, 50) is configured to oscillate and allow the inclination and the curvature of the wheels (3, 3′) by means of the rider weight shifting.