Folding A-Frame Cart with Segmented Subframes
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Solution Overview
Problem
Existing specialized carts for transporting flat goods are often rigid, heavy, cumbersome, and lack features such as storage compartments, making them difficult to maneuver and store, especially when carrying them up stairs or loading/unloading into vehicles.
Innovation Solution
A wheeled cart with five subframe sections connected by hinges that can fold into a compact shape, featuring integrated storage trays, ergonomic handholds, secure cargo straps, and a lightweight design with angled subframes to prevent goods from falling, along with a folding tray and storage containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cart is designed as a rigid specialized cart for transporting flat goods, then it provides stable support for goods, but it becomes heavy and cumbersome making it difficult to maneuver and store
Solution Approach 1:
The cart is divided into multiple subframe sections (first subframe, second subframe, third subframe, fourth subframe) connected by hinges. This segmentation allows the cart to maintain structural stability when assembled while enabling compact folding for easy storage and transport, resolving the contradiction between stability and weight/maneuverability.
2Stability of the object's composition
If the cart is designed as a rigid specialized cart, then it provides dedicated support for flat goods, but it offers limited adaptability for different goods and storage needs
Solution Approach 1:
The cart incorporates multiple functional elements including cargo straps for securing different types of goods, an integrated tray for storing tools and supplies, and adjustable subframe sections. These features enable the cart to accommodate various flat goods and transport needs, transforming a specialized design into a versatile multi-functional platform.
3Weight of moving object
If the cart is designed to be lightweight, then it becomes easier to lift and transport, but it may reduce the load-carrying capacity
Solution Approach 1:
The cart utilizes composite construction with aluminum or aluminum alloy subframes combined with plastic components (tray, storage containers). This composite material approach reduces the overall weight of the cart while maintaining sufficient structural strength to support heavy loads, resolving the contradiction between lightweight design and load-carrying capacity.
4Adaptability or versatility
If the cart includes storage compartments and integrated tray, then it provides additional functionality for tools and supplies, but it increases the complexity of the cart structure
Solution Approach 1:
The integrated tray and storage containers are merged with the cart's subframe structure rather than being separate attachments. The tray is formed as part of the subframe assembly, and storage containers attach directly to subframe sections. This merging approach adds storage functionality while minimizing the increase in overall structural complexity.
Data Source
AI summary
A transportation apparatus, having an A-frame including a first subframe, second subframe, third subframe, and a fourth subframe; wherein the first and second subframes form a base of the A-frame, and the third and fourth subframes form sides of the A-frame; including a locking mechanism for transitioning the transportation apparatus between an expanded state and a collapsed state, the locking mechanism adjustable between an engaged state and a disengaged state; and wherein the folding transportation apparatus includes an A-frame mounted to a base, the base having at least one wheel, and a second frame rotatably mounted to the A-frame.