Foldable Wagon Collapsible Frame Linkage Design
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Solution Overview
Problem
Existing folding wagons often have complex, heavy, and expensive frames, which limit their practicality and usability.
Innovation Solution
A foldable wagon design featuring a collapsible frame with a linkage assembly and flexible housing, allowing conversion from an open to a closed configuration without a sidewall in a plane perpendicular to the floor assembly, using a two-bar linkage and a receiver to engage the floor assembly, and a flexible housing that forms a retractable enclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional frame structure is used in folding wagons, then structural strength and stability are maintained, but the frame becomes complex, heavy, and expensive
Solution Approach 1:
The frame is divided into multiple segments connected by pivot joints, allowing each segment to fold independently. This segmentation reduces overall material usage while maintaining structural integrity during the folded and unfolded states.
Solution Approach 2:
The frame transitions from a static structure to a dynamic one with movable pivot joints. This allows the frame to adapt its configuration between folded and unfolded states, reducing material requirements while maintaining strength where needed.
2Stability of the object's composition
If a traditional frame structure is used in folding wagons, then structural stability is maintained, but the weight increases
Solution Approach 1:
By segmenting the frame into lighter components connected by pivot joints, the overall weight is reduced while maintaining stability through the geometric relationships between segments during the folded and unfolded configurations.
Solution Approach 2:
The frame's geometric parameters change during folding and unfolding, allowing the structure to maintain stability in both states with reduced material usage. The pivot joints enable controlled parameter changes that preserve structural integrity.
3Adaptability or versatility
If a sidewall is included in the frame plane perpendicular to the floor assembly, then enclosure is provided, but the folding mechanism becomes more complex
Solution Approach 1:
A flexible housing material is used instead of rigid sidewalls integrated into the frame. This flexible housing can be attached to the frame and provides enclosure when needed, while allowing the frame itself to fold without additional complexity from rigid sidewall integration.
Solution Approach 2:
The enclosure function is separated from the frame structure, with the flexible housing acting as an independent component. This segmentation allows the frame to fold independently while the housing provides enclosure when attached, reducing overall mechanism complexity.
Data Source
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AI summary
A foldable wagon is provided that converts from a use configuration to a folded configuration for storage and transportation. The foldable wagon has a collapsible frame, a foldable floor assembly and a linkage assembly. The foldable wagon may also have a flexible housing over a portion of the frame. The flexible housing may have a retractable sidewall.