Pivotable Rear Wheel Assembly for Stable Motorized Cycle
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Solution Overview
Problem
Two-wheeled motorcycles lack stability for certain demographics, while trikes/tricycle-type vehicles are too cumbersome for navigating tight spaces, necessitating a vehicle that combines stability with maneuverability and a compact storage configuration.
Innovation Solution
A three-wheeled motorized cycle with a rigid frame, pivotable rear wheels, and a steering mechanism, featuring a motor and battery setup for stability and maneuverability, along with a collapsible design for easy storage and transport, and integrated brake mechanisms for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a third wheel is added to create a trike or tricycle-type vehicle, then stability is improved, but maneuverability deteriorates
Solution Approach 1:
The patent applies the dynamics principle by making the rear wheel assembly pivotable relative to the frame. The rear wheels can rotate about a vertical axis, allowing the vehicle to dynamically adjust its configuration. This enables the trike to achieve tight turning radii by pivoting the rear section, thereby maintaining maneuverability while preserving the stability benefits of three wheels.
2Stability of the object's composition
If a trike or tricycle-type vehicle is designed with a wider body for stability, then stability is improved, but storage and transport difficulty increases
Solution Approach 1:
The patent utilizes the dynamics principle by enabling the rear wheel assembly to pivot and collapse toward the front of the vehicle. When the rear wheels are pivoted forward, the overall vehicle width and length are reduced, creating a compact collapsed configuration suitable for storage and transport. This dynamic reconfiguration allows the vehicle to maintain a stable wide body during operation while becoming compact when needed.
Solution Approach 2:
The patent applies segmentation by dividing the vehicle into distinct modular sections: a front frame portion and a rear wheel assembly connected by a pivot joint. This segmentation allows the rear assembly to be independently maneuvered and collapsed, enabling compact storage while maintaining the functional integrity of the three-wheel configuration during operation.
3Ease of operation
If a two-wheeled motorcycle design is used, then maneuverability is improved, but stability deteriorates
Solution Approach 1:
The patent applies the merging principle by combining the maneuverability characteristics of two-wheeled motorcycles with the stability of three-wheeled vehicles. The steerable front wheel provides directional control similar to motorcycles, while the additional rear wheel(s) provide enhanced stability. The pivotable rear assembly allows the vehicle to merge the agility of two-wheeled designs with the stability of three-wheeled configurations.
Data Source
AI summary
A vehicle for a person to ride on a ground surface includes a frame that has a front end and a rear end. The frame supports a seat on a top side of the frame and a steering mechanism proximate the front end of the frame for allowing the person to steer a front wheel. A frame extension has a front end pivotally fixed proximate the rear end of the frame and includes two rear wheels projecting laterally away therefrom. At least one of the rear wheels is coupled with a motor through a transmission to drive the vehicle. In use, the frame extension and rear wheels are pivoted forward to place the vehicle in a collapsed configuration for storage. To use the vehicle, the frame extension is pivoted backward to place the vehicle in an operating configuration. Preferably the motor and transmission are disposed between the two rear wheels.