Adjustable Wheelbase Movable Carrier for Stability and Maneuverability
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Solution Overview
Problem
Conventional movable carriers, such as wheelchairs and strollers, face a dilemma where the fixed distance between the front and rear wheels cannot be adjusted, failing to simultaneously ensure stability during movement and a small rotation radius for navigating narrow spaces.
Innovation Solution
A movable carrier design that includes a handle which, when rotated, activates a driving module to adjust the distance between the wheels, allowing the user to increase stability or reduce the wheelbase for navigating tight spaces by pivoting the support members relative to the main body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the distance between the front wheel and the rear wheel is increased to improve stability, then the stability during movement is improved, but the rotation radius increases making it difficult to navigate narrow spaces
Solution Approach 1:
The patent applies the dynamics principle by making the wheelbase adjustable rather than fixed. The support member can rotate relative to the main body, allowing the distance between wheels to change dynamically. This enables the movable carrier to adapt its stability and rotation radius according to different usage scenarios - increasing distance for stability in open spaces and decreasing distance for maneuverability in narrow spaces.
2Ease of operation
If the distance between the front wheel and the rear wheel is decreased to reduce rotation radius for narrow spaces, then the rotation radius is reduced, but the stability during movement deteriorates
Solution Approach 1:
The same dynamics principle resolves this contradiction by allowing the user to adjust the support member's rotation angle. When navigating narrow spaces, the user can rotate the support member to decrease the wheelbase, reducing the rotation radius for better maneuverability. The system dynamically adapts between these conflicting requirements through mechanical adjustment.
3Device complexity
If the distance between wheels is fixed in conventional design, then the structure is simple, but the adaptability to different usage requirements is poor
Solution Approach 1:
The patent resolves this contradiction by introducing a rotatable support member that can adjust the wheelbase length. This dynamic structure allows the movable carrier to adapt to different usage requirements - whether for stability in open areas or maneuverability in narrow spaces - while maintaining reasonable structural simplicity through the use of a single rotatable joint mechanism.
Data Source
AI summary
A movable carrier includes a main body, a first wheel, a driving module, a first support member, a second wheel, a seat, a first handle and two first switches. The first wheel is pivotally connected to the main body. The driving module is disposed in the main body. The first support member is connected to the driving module. The second wheel is pivotally connected to the first support member. The seat is disposed on the main body. The first handle is pivotally connected to the seat and has a trigger portion. The first switches are disposed on the seat. When the first handle rotates with respect to the seat and the trigger portion triggers the first switch, the driving module drives the first support member to rotate with respect to the main body, so as to increase or decrease a distance between the first wheel and the second wheel.