Folding Cart X-Shaped Cross-Hinged Frame Mechanism
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Solution Overview
Problem
Existing carts are typically fixed and non-folding, making them inconvenient for use and storage.
Innovation Solution
A folding cart design featuring a frame body with X-shaped cross-hinged structures and a handle mechanism, allowing the cart to be easily folded and stored by tilting and swinging the X-shaped cross-hinged structures, and using a lever mechanism to drive the folding mechanisms, enabling compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a fixed non-folding cart is used, then the cart structure is simple and stable, but the cart occupies large space and is inconvenient for storage and portability
Solution Approach 1:
The cart frame is divided into multiple segments connected by hinges, allowing each segment to fold independently. The chassis includes front and rear folding mechanisms with multiple hinged connections that enable progressive folding from the front to the rear, reducing the overall volume while maintaining structural integrity during use.
Solution Approach 2:
The cart transitions from a static fixed structure to a dynamic folding structure. Hinged connections at multiple points allow the cart to change its configuration between an extended usable state and a compact stored state, adapting the cart's dimensions to different operational requirements.
2Ease of operation
If a folding mechanism is added to the cart, then the cart becomes portable and space-saving, but the structure becomes more complex and may affect stability
Solution Approach 1:
The folding mechanisms are integrated into the existing cart frame structure rather than being separate add-on components. The hinged connections are incorporated at strategic points within the chassis design, merging the folding function with the structural framework to minimize additional complexity and maintain stability.
Solution Approach 2:
The cart is designed with pre-configured hinge connections and folding paths that enable smooth, predictable folding motion. The structural design anticipates the folding sequence and positions connections to guide the folding process, ensuring stable transition between states without requiring complex control mechanisms.
3Volume of moving object
If multiple folding mechanisms are implemented, then the cart achieves compact folding, but the manufacturing complexity and cost increase
Solution Approach 1:
The same hinge connection design and folding mechanism pattern are reused across multiple locations in the cart frame. The front folding mechanism, rear folding mechanism, and side folding mechanisms all utilize similar structural principles and connection types, allowing for standardized manufacturing processes and reducing overall production complexity despite the multi-functional folding capability.
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 folding cart is convenient to use and occupies less space when not in use, offering a practical solution for storage and portability.
Implementation Method 1
The chassis is of an X-shaped cross-hinged structure, and four ends of the chassis are respectively hinged to the four lower hinged seats
Implementation Method 2
The handle mechanism includes a lever, a lever hinged seat disposed on the lever, and pulling rods hinged to both sides of the lever hinged seat, wherein the lever can drive the lever hinged seat to move upward
Data Source
AI summary
A folding cart includes a frame body and a handle mechanism. The frame body comprises a chassis, four lower hinged seats at four corners of the chassis, a front folding mechanism in front of the chassis, a rear folding mechanism behind the chassis and two side folding mechanisms on the side of the chassis. A bottom portion of the lower hinged seats is provided with wheels. The chassis is an X-shaped cross-hinged structure and has four end portions respectively hinged to the lower hinged seats. The side folding mechanism has at least one X-shaped cross-hinged rod assembly with upper ends hinged to the upper hinged seats and lower ends hinged to the lower hinged seats. The front folding mechanism and the rear folding mechanism respectively have at least one X-shaped cross-hinged rod assembly having two hinged cross rods.