Vertical-Bar Connection Assembly for Collapsible Wagon
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Solution Overview
Problem
Conventional collapsible wagons face challenges with complex structures, numerous connecting bars, and difficulty in collapsing and storing due to their large occupied space.
Innovation Solution
A vertical-bar connection assembly with a simple structure and fewer connecting bars, featuring a hinged design between adjacent vertical bars, allowing for easy extension and folding, and a groove-shaped housing connector to prevent further rotation in the extended state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional collapsible wagons use multiple connecting bars to maintain structural stability, then the structural strength is improved, but the device complexity increases and the collapsing becomes difficult
Solution Approach 1:
The connecting structure is divided into multiple telescopic segments (first connecting bar, second connecting bar, third connecting bar) that can independently extend and retract. Each segment is connected through hinged joints, allowing the overall structure to achieve both strength through multiple components and simplicity through modular segmentation that enables easy collapsing.
Solution Approach 2:
The connecting bars are designed with telescopic capability and hinged joints that allow dynamic adjustment between extended and retracted states. The first and second connecting bars can rotate relative to each other, and the third connecting bar can telescope, enabling the structure to transition from a stable extended state to a compact folded state while maintaining structural integrity.
2Device complexity
If conventional collapsible wagons have a simple collapsing structure with fewer bars, then the device complexity is reduced, but the structural strength deteriorates
Solution Approach 1:
The connecting bars are designed with telescopic capability and hinged joints that allow dynamic adjustment between extended and retracted states. The first and second connecting bars can rotate relative to each other, and the third connecting bar can telescope, enabling the structure to transition from a stable extended state to a compact folded state while maintaining structural integrity.
Solution Approach 2:
The telescopic connecting bars are designed with nested segments that can be inserted into each other when retracted. The first connecting bar contains the second connecting bar, which in turn contains the third connecting bar, creating a compact nested configuration that reduces overall structure complexity while maintaining strength through the layered structural arrangement.
3Ease of operation
If the connecting bars are allowed to rotate freely to enable collapsing, then the ease of operation is improved, but the stability of the extended state deteriorates
Solution Approach 1:
The groove-shaped housing connector provides preliminary constraint against excessive rotation of the first and second connecting bars. The groove structure pre-prevents over-rotation by providing physical stops at the boundaries of the allowed rotation range, ensuring that the connecting bars remain within the stable angular range while still allowing free rotation for collapsing operations.
Solution Approach 2:
The groove-shaped housing connector acts as an intermediary component between the rotating connecting bars and the fixed structure. It mediates the rotation motion by providing guided movement within the groove while preventing excessive rotation, thus maintaining stability during the collapsing and extending operations without restricting necessary motion.
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 collapsible wagon with the vertical-bar connection assembly achieves convenient collapsing, occupies a small space after folding, and is easy to store and carry, addressing the limitations of existing wagons.
Implementation Method 1
The proximal ends of the first connecting bar and the second connecting bar are hinged with each other. The distal ends of the first connecting bar and the second connecting bar are respectively adapted to be hinged with the adjacent vertical bars of the collapsible wagon, and are rotatable about their respective proximal ends
Data Source
AI summary
A vertical-bar connection assembly for a collapsible wagon and a collapsible wagon is provided. The vertical-bar connection assembly has an extended state and a folded state. The vertical-bar connection assembly comprises at least one vertical-bar connection member comprising a first connecting bar and a second connecting bar. Each of the first connecting bar and the second connecting bar has a proximal end and a distal end. The proximal ends of the first connecting bar and the second connecting bar are hinged with each other. The distal ends of the first connecting bar and the second connecting bar are respectively adapted to be hinged with the adjacent vertical bars of the collapsible wagon, and are rotatable about their respective proximal ends to move away from or close to each other, so as to allow the vertical-bar connection assembly to be in the extended state or in the folded state.