Plug-In Rollator Wheel Assembly for Adjustable Track Width
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Solution Overview
Problem
Existing rollators designed for indoor or outdoor use are unsuitable for both environments due to their fixed track widths, leading to instability, maneuverability issues, and the need for separate devices, which are costly and inefficient.
Innovation Solution
A pluggable wheel assembly with interchangeable wheel positions allows for adjustable track width by positioning wheels inside or outside the rollator frame, using a retaining bracket and axle system for easy repositioning and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wheel arrangement is fixed for a specific indication radius, then the rollator is optimized for a specific use case, but it cannot be adapted to different environments or user needs
Solution Approach 1:
The wheel assembly incorporates a movable wheel component that can be repositioned along the longitudinal axis of the rollator frame. This dynamic adjustment mechanism allows the track width to be changed, enabling the same rollator to adapt to different indication radii and environmental conditions without requiring multiple specialized devices
Solution Approach 2:
The wheel assembly is divided into separable components including the wheel, wheel bearing, and mounting bracket. This segmentation allows individual components to be adjusted or repositioned independently, facilitating easy modification of the wheel arrangement to suit different usage requirements
2Adaptability or versatility
If the rollator is designed for a specific indication radius, then it performs optimally for that radius, but it lacks flexibility for users with different visual needs
Solution Approach 1:
The movable wheel component can be repositioned to change the track width, allowing users to adjust the indication radius according to their visual acuity and environmental conditions. This dynamic adjustment provides flexibility for different visual needs while maintaining ease of operation through a simple repositioning mechanism
Solution Approach 2:
The adjustment mechanism is designed to be user-operable without requiring external tools or assistance. Users can independently reposition the wheel component along the frame to achieve their desired indication radius, making the system self-serviceable and easy to operate
Data Source
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AI summary
A modular wheel arrangement for a rollator is described, whereby the individual wheels of the rollator can be repositioned as needed. This allows the driving characteristics to be adapted to the environment in which the rollator is to be used by changing the track width.