Folding Tricycle Frame With Adjustable Rear Wheel Arms
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Solution Overview
Problem
Conventional folding tricycles face challenges in adjusting dimensions for storage without compromising their ability to be ridden, as they either become immobile in storage position or lose stability when dimensions are reduced.
Innovation Solution
A folding tricycle design with a frame that allows adjustable distance between rear wheels and the front wheel, enabling both width and length adjustments through rotatable arms connected via intermediate parts, ensuring rear wheels remain parallel to the longitudinal axis in all positions, allowing the tricycle to be ridden and stored compactly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the distance between rear wheels is reduced for compact storage, then the width and storage space are minimized, but the stability of the tricycle deteriorates
Solution Approach 1:
The patent implements adjustable rear wheel spacing through a mechanical linkage system with links and pivots that allow the distance between rear wheels to be dynamically changed between a first distance (stable configuration) and a second distance (compact configuration). This dynamic adjustability resolves the contradiction by enabling the tricycle to switch between stable and compact states as needed.
2Area of stationary object
If the distance between front wheel and rear wheels is reduced for compact storage, then the length and storage space are minimized, but the stability and rideability deteriorate
Solution Approach 1:
The patent implements adjustable wheelbase through a mechanical linkage system that allows the distance between front wheel and rear wheels to be dynamically changed between a first distance (stable configuration for riding) and a second distance (compact configuration for storage). This dynamic adjustability resolves the contradiction by enabling the tricycle to switch between stable and compact states as needed.
3Stability of the object's composition
If the tricycle is designed with fixed dimensions for optimal stability, then the stability is maximized, but the adaptability for different storage spaces and narrow passages is reduced
Solution Approach 1:
The patent implements adjustable rear wheel spacing through a mechanical linkage system with links and pivots that allow the distance between rear wheels to be dynamically changed between a first distance (stable configuration) and a second distance (compact configuration). This dynamic adjustability resolves the contradiction by enabling the tricycle to switch between stable and compact states as needed.
Solution Approach 2:
The patent changes the physical parameters of the tricycle (distance between rear wheels and distance between front wheel and rear wheels) from fixed values to adjustable values. This allows the tricycle to adapt its dimensions to different storage spaces and usage conditions while maintaining stability when needed.
4Area of stationary object
If the tricycle dimensions are reduced for storage, then the storage space requirement is minimized, but the mobility and ability to be ridden without lifting is lost
Solution Approach 1:
The patent implements adjustable wheelbase through a mechanical linkage system that allows the distance between front wheel and rear wheels to be dynamically changed between a first distance (stable configuration for riding) and a second distance (compact configuration for storage). This dynamic adjustability resolves the contradiction by enabling the tricycle to switch between stable and compact states as needed.
Data Source
AI summary
A folding tricycle (1) for transporting a person, wherein the tricycle (1) comprises a front wheel (2), two rear wheels (3) and a frame joining the wheels (2, 3) wherein the frame comprises two arms (7) that carry the rear wheels (3). The arms (7) are connected to the rest of the frame in such a manner that the arm (7) can adopt different positions relative to the rest of the frame. The width and length of the tricycle (1) are therefore adjustable. In all positions of the arms (7), the 10 planes wherein the rear wheels (3) are located are substantially parallel to the longitudinal axis of the tricycle (1), and the tricycle (1) can be driven.