Folding Cart Frame and Handrail Layout for Compact Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional carts are inconvenient to store when not in use due to their size and the interference between the cart frame and wheel assembly during folding.
Innovation Solution
A folding cart design with a cart frame assembly, wheel assembly, and handrail assembly, featuring hinged support rods and connecting parts that allow the cart to fold without changing its overall height, ensuring the wheel assembly does not interfere, and a rotatable handrail for ease of movement on uneven terrain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cart is folded to improve storage convenience, then the storage space is reduced, but the cart frame assembly interferes with the wheel assembly
Solution Approach 1:
The cart frame is divided into multiple support rod assemblies that can be independently folded. Each support rod assembly includes multiple support rods connected by connecting parts, allowing the frame to be segmented into foldable sections that can be collapsed without interfering with the wheel assembly.
Solution Approach 2:
The support rods are arranged to nest within each other when folded. The first connecting part and second connecting part enable the support rods to be nested in a compact configuration, allowing the cart frame to be folded into a small volume without the frame interfering with the wheels.
2Quantity of substance
If the cart frame is made longer to increase carrying capacity, then the cart can carry more goods, but the folded height increases causing interference with the roller assembly
Solution Approach 1:
The support rod assemblies are designed with dynamic folding capability. The connecting parts allow the support rods to change their spatial arrangement from an extended configuration (for carrying capacity) to a nested configuration (for folded height), enabling the cart to accommodate both long frame length and compact folded dimensions.
Solution Approach 2:
The folding mechanism transforms the spatial arrangement of the support rods from a vertical extension (increasing folded height) to a horizontal nesting arrangement. This dimensional transformation allows the cart frame to maintain length for carrying capacity while reducing folded height to avoid interference with the roller assembly.
3Volume of moving object
If the sidewall assembly is folded to reduce storage space, then the cart is more compact, but the folded sidewall assembly interferes with the roller assembly
Solution Approach 1:
The sidewall assembly is extracted as a separate foldable component from the main cart frame. The sidewall assembly can be independently folded and stored separately from the roller assembly, eliminating the interference problem while maintaining the compact storage advantage.
Data Source
AI summary
The present disclosure provides a folding cart. The folding cart includes a cart frame assembly, a wheel assembly, and a handrail assembly. The cart frame assembly may include a plurality of sets of support rod assemblies and a base frame hinged to lower ends of the plurality of sets of support rod assemblies. The wheel assembly may be disposed at a lower end of the cart frame assembly to realize movement of the cart frame assembly. The handrail assembly may be disposed on the cart frame assembly. The cart frame assembly may be driven to move through the handrail assembly under an action of an external force. The handrail assembly may be rotatably connected to the cart frame assembly to make the handrail assembly rotate at least on a first plane.