Tool-Free Rolling Storage Cart Assembly With Integrated Drawer Tracks
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Solution Overview
Problem
Existing rolling storage carts with drawers require assembly tools and connecting components, increasing assembly time, labor costs, and manufacturing costs.
Innovation Solution
A rolling storage cart with drawers that integrates side frames, top and bottom edge bars, and wheels as finished products, allowing assembly and disassembly without tools, using screw locks and C fasteners for secure stacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional rolling storage carts are packaged in pieces for storage, then packaging volume is reduced, but assembly requires tools and connecting components which increases assembly time and manufacturing cost
Solution Approach 1:
The storage cart is divided into modular components (side frames, top/bottom edge bars, wheels, drawers) that can be packaged separately in a compact state and assembled into a larger functional structure when needed. This segmentation allows reduced packaging volume while maintaining ease of assembly through standardized connection interfaces.
Solution Approach 2:
Multiple structural elements are merged into integrated components - the side frames incorporate drawer tracks, the edge bars include engaging columns, and the wheels have integrated screw locks. This merging reduces the number of separate connecting components needed, simplifying assembly while allowing compact packaging.
2Strength
If screws and connecting components are used for assembly, then structural integrity is improved, but assembly tools and time are required which increases labor costs
Solution Approach 1:
Connection features such as engaging columns, grooves, and locking mechanisms are pre-formed during manufacturing of the main components. This preliminary action eliminates the need for separate assembly operations requiring tools and specialized skills, allowing users to simply engage components without screws or hexagonal wrenches while maintaining structural integrity.
Solution Approach 2:
The cart components are designed with self-aligning and self-locking features - the engaging columns fit into corresponding slots, the drawers self-align in their tracks, and the wheel locks engage automatically. This self-service design eliminates the need for external assembly tools and reduces assembly time to simple manual operations.
Data Source
AI summary
A rolling storage cart with drawers has at least one cart member and a plurality of drawers. The cart member has two side frames, two top edge bars, two bottom edge bars, and a plurality of wheels; each side frame has a main frame with a plurality of drawer tracks. Two ends of each edge bar respectively has an engaging column, and a top end and bottom end of each main frame respectively jackets onto one of the engaging columns of each edge bar. Each wheel has a screw lock for securing onto one of the bottom edge bars. Each drawer is configured to slidably engage two grooves of two opposite drawer tracks.