Telescoping Backpack Extraction Cart Frame Design
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Solution Overview
Problem
Existing portable wheeled carts for transporting loads over uneven terrain lack versatility, adjustability, and ease of transport, as they are often rigid and cumbersome.
Innovation Solution
A portable collapsible two-wheeled transport cart with a tubular telescoping lightweight frame, fixed and folding wheels, cross and elongated netting for multiple use, and an optional travel hitch for powered towing, allowing for adjustable longitudinal extensions and easy backpack configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cart uses a rigid frame structure, then it provides structural strength and stability, but it becomes cumbersome and difficult to transport
Solution Approach 1:
The frame is divided into multiple telescoping segments that can slide relative to each other. The main frame body (11) contains telescoping frame members (13, 14, 15, 16, 17, 20, 21) that can extend and retract, allowing the rigid structure to be collapsed into a compact form for transport while maintaining full strength when extended for use.
Solution Approach 2:
The frame transitions from a static rigid structure to a dynamic telescoping structure. The frame members can be adjusted between extended and retracted positions using locking mechanisms (19, 22), enabling the cart to adapt its size and weight for different operational and transport conditions while maintaining structural integrity.
2Reliability
If the cart has fixed wheel size, then it provides stable performance, but it lacks adaptability to varied terrain
Solution Approach 1:
The cart is designed with interchangeable wheel assemblies that can be attached to the frame. Different wheel sizes and types can be selected based on terrain requirements - larger wheels for rough terrain, smaller wheels for smooth surfaces. The wheel mounting system allows quick replacement while maintaining stable cart operation.
Solution Approach 2:
The wheel configuration is made adjustable rather than fixed. The cart can dynamically adapt to different terrain conditions by changing wheel assemblies, with each wheel type optimized for specific terrain types while maintaining overall cart stability through proper mounting and balance.
3Productivity
If the cart frame is extended for full load capacity, then it provides maximum transport capability, but it increases weight and reduces portability
Solution Approach 1:
The frame is segmented into telescoping sections that can be independently adjusted. When less than maximum load capacity is needed, the frame can be partially retracted, reducing the overall weight and dimensions while maintaining sufficient structural strength for lighter loads, thus improving portability without sacrificing maximum transport capability when needed.
Data Source
AI summary
A self-contained portable material transport cart for game transport and utility transport of equipment and supplies including emergency medical transport in multiple venues. The extraction cart has a lightweight collapsible frame with cargo support straps or netting. Fixed and folding wheels and telescopically extensible frame members allow for compact storage and backpack transport to user location. Extensible frame is adjustable for length and width for cargo transport with an optional trailer hitch adapter allowing the cart to be pulled by an off-road vehicle, if needed.