Motorized Beach Cart Center of Gravity and Collapsible Frame
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Solution Overview
Problem
Existing motorized beach carts lack features such as collapsible storage containers, stability, and the ability to traverse sand and stairs, and often require complex and expensive equipment for stair climbing, which may not withstand beach environments.
Innovation Solution
A motorized beach cart with a collapsible frame and storage compartment, positioned to enhance stability, featuring a drive compartment that allows for compact storage and clearance for wheels, enabling operation on two rear wheels for stair climbing, and a design that positions the center of gravity forward for stability on uneven terrain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cart is designed with a collapsible frame and storage compartment for compact storage, then the cart can be easily stored and transported, but the structural stability and durability may be compromised
Solution Approach 1:
The cart is divided into collapsible segments including the frame, storage compartment, and support platform that can be folded or disassembled for compact storage, while maintaining structural integrity when assembled
Solution Approach 2:
The cart employs dynamic structural elements such as collapsible legs, foldable handles, and adjustable components that transition between expanded stable configurations and collapsed compact configurations
2Adaptability or versatility
If the cart operates on two rear wheels for stair climbing, then the cart can traverse stairs and uneven terrain, but the stability on flat sand may be reduced
Solution Approach 1:
The cart uses a dynamic wheel configuration where the front wheel can be lifted off the ground during stair climbing operations, allowing the cart to operate stably on two rear wheels for vertical traversal while maintaining four-wheel contact for stability on flat surfaces
Solution Approach 2:
The propulsion system is segmented to allow independent operation of front and rear wheels, enabling the cart to selectively engage rear wheels for stair climbing while maintaining front wheel contact for sand stability when needed
3Stability of the object's composition
If the drive compartment is positioned to enhance stability on sand, then the cart is stable on uneven terrain, but the cart may not collapse compactly for storage
Solution Approach 1:
The drive compartment is designed as a separate, modular unit that can be positioned optimally for stability during operation and integrated into the collapsible frame structure for compact storage when folded
Solution Approach 2:
The drive compartment positioning is optimized in the horizontal dimension for stability during operation, while the vertical dimension allows for compact folding and reduced storage volume when the cart is collapsed
Data Source
AI summary
A motorized cart, including: a collapsible frame with a collapsible storage compartment, a front wheel, and two rear wheels rotating about a single axis. The frame has a folding support platform including hingedly connected first and second portions. The first portion rotatably connects at a front of the frame, and the second portion rotatably connects to a rear of the frame. A drive compartment houses a battery, a drive controller, and a motor for driving a rear wheel, and is positioned on the frame to position the battery, the drive controller, and the motor below and forward of the axis in an expanded, upright mode, thereby positioning a cart center of gravity forward of the axis. The drive compartment is shaped and positioned on the frame to: permit the collapsing of the storage compartment and the frame to a collapsed mode; provide clearance for the front wheel during transition between the collapsed mode and the expanded, upright mode; and substantially vertically align the cart center of gravity with the axis in a tilted mode, operating only on the two rear wheels.