Foldable Cart Honeycomb Toe Plate Heavy Load

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Solution Overview

Problem

Existing transport carts are inadequate in supporting heavy loads and navigating uneven surfaces, often breaking under weight and struggling with mobility on diverse terrain.

Innovation Solution

A lightweight, foldable transport cart with a honeycombed toe plate and large, heavy-duty wheels that elevate the toe plate and align half the wheel diameter with it, allowing for secure locking and easy pulling of heavy loads over uneven surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the cart uses thin wheels and a flat base plate, then the cart structure is simple and lightweight, but the cart cannot support heavy loads and breaks under weight

Engineering Contradiction:

Improveload support capacityVSAvoidcart structure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The base plate is segmented into a honeycomb pattern with multiple openings, creating a lightweight yet strong structure. This segmentation allows the base to support heavy loads (up to 160 pounds) while maintaining overall structural simplicity and lightweight design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cart combines a honeycomb-patterned base plate with thick rubber tires to create a composite structure that achieves both strength and lightweight characteristics. The honeycomb base provides structural integrity while the rubber tires add durability and load-bearing capacity.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If the cart uses standard wheels, then the cart is easy to manufacture, but the cart struggles with mobility on uneven surfaces like sand, stairs, and curbs

Engineering Contradiction:

Improvemobility on uneven surfacesVSAvoidwheel manufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The wheels are changed from standard thin wheels to thick rubber tires with specific dimensional parameters (4 inches in diameter). This parameter change enables the cart to navigate uneven surfaces such as sand, stairs, and curbs while maintaining ease of manufacture through the use of standard rubber tire materials and simple mounting structures.

Inventive Principle:

Principle #35Parameter changes

3Strength

If the cart is designed for heavy load support, then the cart can carry up to 160 pounds, but the cart becomes difficult to pull when loaded

Engineering Contradiction:

Improveload bearing capacityVSAvoidease of pulling

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The toe plate is elevated above the ground level, creating a design where the cart's base is raised. This elevation helps distribute the load and reduces the effort required to pull the cart, making it easier to maneuver heavy loads (up to 160 pounds) while maintaining structural strength.

Inventive Principle:

Principle #12Equipotentiality

4Stability of the object's composition

If the cart uses a fixed non-foldable structure, then the cart provides stable support, but the cart occupies excessive storage space when not in use

Engineering Contradiction:

Improvestructural stabilityVSAvoidstorage space occupation

Core Design Contradiction:

Stability of the object's compositionVSVolume of moving object

Solution Approach 1:

The cart is designed with foldable components including the handle section and toe plate that can be collapsed against the main body. This dynamic structure allows the cart to transition from a stable, operational configuration to a compact storage configuration, reducing storage space occupation while maintaining structural stability during use.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The cart features a nested design where the handle section and toe plate can be folded against and stored within the main body of the cart. This nesting arrangement allows the cart to occupy minimal storage space when not in use while providing stable support when deployed.

Inventive Principle:

Principle #7Nested doll (Nesting)

5Volume of moving object

If the cart uses a lightweight foldable design, then the cart is compact for storage, but the cart may lack durability for heavy loads

Engineering Contradiction:

Improvestorage compactnessVSAvoiddurability under heavy loads

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The base plate is segmented into a honeycomb pattern that provides structural strength despite the lightweight design. This segmentation creates multiple load-bearing points that distribute heavy loads (up to 160 pounds) across the structure, ensuring durability while maintaining compact foldable dimensions for storage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cart combines a lightweight honeycomb base plate with thick rubber tires to create a composite structure that achieves both compact storage dimensions and durability for heavy loads. The rubber tires provide additional strength and shock absorption to compensate for the lightweight base structure.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS9233700B1Portable cart with removable shopping bag

Publication Date: 2016.01.12 DBEST PRODUCTS INC

AI summary

A portable heavy wheeled flat based foldable transport cart which includes a transport cart with a shopping bag with multiple pockets therein which is removably affixed to the cart. While weighing only four (4) pounds, the honeycombed toe plate and large heavy wheels enable the cart to carry one hundred sixty (160) pounds of load when the shopping bag is removed.