Foldable Cart Frame with Pivoting Supports for Compact Packaging
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Solution Overview
Problem
Existing foldable carts are inconvenient to operate, lack structural strength, and have large packaging sizes, failing to balance size and strength effectively.
Innovation Solution
A foldable cart design featuring a pulling rod assembly, foldable cart frame with inverted U-shaped frames, and adjustable wheels, allowing for easy folding and unfolding, compact storage, and high structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cart is designed to be large to provide high structural strength and large space, then the structural strength and cargo capacity are improved, but the packaging size and storage convenience deteriorate
Solution Approach 1:
The cart frame is divided into multiple segments including front frame, rear frame, and bottom supporting assembly that can be folded relative to each other. This segmentation allows the cart to maintain a large expanded size for strength and capacity while folding into a compact package for storage.
Solution Approach 2:
The cart employs dynamic folding mechanisms with pivoting connections between the front frame, rear frame, and bottom supporting assembly. These dynamic joints enable the cart to transition between a large expanded configuration for use and a compact folded configuration for storage, resolving the contradiction between size and strength.
2Quantity of substance
If the cart is designed to be large to provide large cargo space, then the cargo capacity is improved, but the ease of operation and maneuverability deteriorate
Solution Approach 1:
The folding mechanism with pivoting joints between front frame, rear frame, and bottom supporting assembly enables easy transformation between expanded and folded states. This dynamic design allows the cart to provide large cargo capacity when expanded while being easily folded for storage and transport, improving ease of operation.
3Volume of stationary object
If the cart is made foldable to reduce packaging size, then the storage convenience is improved, but the structural strength deteriorates
Solution Approach 1:
The cart frame is segmented into front frame, rear frame, and bottom supporting assembly connected by pivoting joints. This segmentation allows the structure to fold into a compact package while maintaining structural integrity through the distributed framework design that preserves strength even in folded configuration.
Solution Approach 2:
The pivoting connections are pre-designed with appropriate geometry and positioning to ensure that when the cart is folded, the segments align in a way that maintains structural strength. The preliminary design of the folding mechanism ensures that strength is not compromised during the folding process.
4Stability of the object's composition
If the cart is designed with fixed casters for stability, then the stability is improved, but the adaptability to different terrains and flexibility in use deteriorate
Solution Approach 1:
The cart employs adjustable casters that can be rotated and positioned at different angles. This dynamic adjustment capability allows the casters to adapt to different terrains and usage requirements while maintaining stability when properly positioned, resolving the contradiction between fixed stability and flexible adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design provides a compact, flexible, and convenient foldable cart with high structural strength, minimizing packaging size while maintaining a large capacity.
Implementation Method 1
the bottom supporting assembly comprises a front supporting frame and a rear supporting frame which are pivoted together
Implementation Method 2
each foldable fence assembly has a front end which is pivoted to the front frame and a rear end which is pivoted to the rear frame
Implementation Method 3
a bottom end of the pulling rod assembly is rotatably connected to a middle portion of the front connecting bar
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
The foldable cart has a pulling rod assembly (5), a foldable cart frame (A), a plurality of wheels (6, 7) and a storage bag (100). The foldable cart frame has a front frame (1), a rear frame (2), two foldable fence assemblies (4) and a foldable bottom supporting assembly (3). A front connecting bar (8) is connected to a bottom of the front frame, and a bottom end of the pulling rod assembly is rotatably connected to a middle portion of the front connecting bar. The number of the wheels is four, two wheels are a pair of front universal wheels and two wheels are a pair of rear directional wheels, the two front universal wheels detachably connect to the front connecting bar (8); the rear frame has a pair of mounting blocks (20) disposed on a bottom of the rear frame, and each rear directional wheel detachably connects to a corresponding mounting block.