Modular Cart Design for Vehicle Doors and Roofs
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Solution Overview
Problem
Conventional carts used to carry vehicle doors and roofs are not detachable, occupy large space, are cumbersome to transport, and have a short service life due to their welded metal structure, which leads to corrosion and deformation.
Innovation Solution
A cart design featuring a modular structure with detachable frames and rods connected by corner braces and T-shaped screws, along with universal wheels and protective features like plastic covers and anti-collision tapes, allowing for easy assembly, disassembly, and transportation without welding, reducing space occupation and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a welded metal structure is used for the cart frame, then the cart has high strength and structural stability, but it becomes non-detachable, occupies large space, and has short service life due to corrosion
Solution Approach 1:
The cart frame is divided into multiple detachable components including vertical rods, horizontal rods, corner braces, and T-shaped screws. These segmented parts can be assembled and disassembled without welding, allowing the cart to be broken down for compact storage and transportation while maintaining structural integrity during use.
2Stability of the object's composition
If a welded metal structure is used for the cart frame, then the cart has structural stability, but it is cumbersome to transport and occupies large space
Solution Approach 1:
The frame is segmented into modular components that can be disassembled into smaller parts. When disassembled, the cart components can be compactly stored in a briefcase or small container, dramatically reducing the space occupation from a full-sized cart to a compact portable package.
3Strength
If a welded metal structure is used for the cart frame, then the cart has initial structural integrity, but the welded areas corrode over time leading to deformation and failure
Solution Approach 1:
By eliminating welded joints through segmentation into screw-connected components, the cart removes the vulnerable welded areas that are prone to corrosion. The detachable design allows individual components to be replaced if corroded, and the connection points use non-welded fasteners that are more resistant to corrosion propagation.
4Ease of operation
If a detachable modular structure is used for the cart frame, then the cart becomes easy to disassemble and transport, but the structural stability and strength may be compromised
Solution Approach 1:
Multiple structural elements (vertical rods, horizontal rods, corner braces) are combined through T-shaped screws and corner braces to create a unified stable structure. The merging of these components through robust mechanical connections maintains structural stability comparable to welded joints while preserving detachability.
Solution Approach 2:
The T-shaped screws and corner braces are pre-designed with built-in positioning and locking features that ensure proper alignment and secure connection when assembling the frame. This preliminary design of connection mechanisms ensures that users can easily assemble and disassemble the cart without requiring specialized tools or skills, while maintaining structural integrity.
Data Source
AI summary
A cart configured to carry vehicle doors and vehicle roofs includes a bottom frame, a top frame, three front vertical rods, three rear vertical rods, a middle frame, three moving rods, two inner chassis, two side chassis, a rear chassis, and a plurality of universal wheels. The bottom frame includes a front bottom rod, a rear bottom rod, a left bottom rod, and a right bottom rod. The front bottom rod, the rear bottom rod, the left bottom rod, and the right bottom rod are connected end to end. Each two adjacent bottom rods of the bottom frame are detachably installed and connected through a first corner brace and first T-shaped screws. The top frame is arranged directly above the bottom frame. A shape and a size of the top frame are same as a shape and a size of the bottom frame.