Triple-crossed horizontal folding cart for expanded loading capacity
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Solution Overview
Problem
Existing folding portable carts have limited carrying capacity due to their compact size when unfolded, restricting their ability to transport large quantities of materials efficiently.
Innovation Solution
A triple-crossed horizontal folding cart design featuring a cart frame with cross tubes that unfold horizontally to increase loading space and fold compactly for storage, incorporating a telescopic hand lever and detachable wheels for ease of use and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cart is designed to be small for easy storage and transport, then ease of operation is improved, but carrying capacity deteriorates
Solution Approach 1:
The cart employs dynamic folding mechanisms with rotatable cross tubes and chassis connections that allow the structure to transition between a compact folded state for easy storage and transport, and an expanded unfolded state providing large carrying capacity. The rotatable joints enable the cart to adapt its configuration based on operational needs.
Solution Approach 2:
The cart utilizes horizontal folding through cross tubes arranged in triple-crossed configurations, allowing the structure to expand in the horizontal dimension when unfolded to maximize carrying capacity, while folding vertically and compactly when closed for easy storage. This dimensional transformation resolves the contradiction between size and capacity.
2Quantity of substance
If the cart is designed with a large loading space when unfolded, then carrying capacity is improved, but storage space requirements worsen
Solution Approach 1:
The cart's folding mechanism with rotatable cross tubes and chassis connections enables dynamic transformation between a compact folded configuration for storage and an expanded unfolded configuration for loading, allowing the same structure to occupy minimal space when not in use while providing large capacity when needed.
Solution Approach 2:
The cart structure employs nested folding where the chassis and cross tubes can be collapsed into a compact nested configuration when folded, reducing the volume occupied during storage, while expanding to full size when deployed for loading and transport operations.
3Device complexity
If the cart uses a simple folding mechanism, then device complexity is reduced, but stability deteriorates
Solution Approach 1:
The cart divides its structure into modular segments including cross tubes, chassis components, and wall sections connected by rotatable joints. This segmentation allows each component to fold independently while maintaining overall structural integrity, achieving both simplicity in the folding mechanism and stability in the assembled configuration.
Solution Approach 2:
The rotatable connections and curved folding paths of the cross tubes and chassis create a stable spherical joint mechanism that maintains structural rigidity when loaded while allowing smooth folding motion, balancing simplicity of movement with stability of the assembled structure.
Data Source
AI summary
A triple-crossed horizontal folding cart having a cart frame, wherein the cart frame has a frame body formed by a front wall, a rear wall, and two symmetrical side walls, and a chassis disposed at the bottom of the frame body, left and right ends of the front wall are each provided with a wheel, left and right ends of the rear wall are each provided with a wheel, and a front end and a rear end of the chassis are rotatably connected to the front wall and the rear wall respectively. Each of the side walls has a front cross tube, a middle cross tube and a rear cross tube which are rotatably connected in sequence, and two straight tubes of each said cross tube are rotatably connected.