Single-Cross Translational Wagon Folding Mechanism
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Solution Overview
Problem
Existing translational collapsible wagons have complex structures and are inconvenient to fold, occupying large space due to their staggered mounting arrangement of X-shaped assemblies, which reduces their attractiveness and volume capacity.
Innovation Solution
A single-cross translational wagon design featuring a tow bar assembly, single-cross folding assembly, bottom frame folding assembly, front wheel assemblies, and rear wheel assemblies, with a simplified X-shaped structure that allows flexible folding and reduced part count, including a steel ball tow bar assembly and detachable wheel structures for easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two steel tubes are riveted together to form an X-shaped assembly with staggered mounting arrangement, then the structure is simple, but the wagon occupies large space and has reduced volume capacity
Solution Approach 1:
The patent merges two separate X-shaped assemblies into a single integrated X-shaped assembly. The front and rear bottom longitudinal tubes are connected directly at their ends to form one continuous X-shape structure, eliminating the need for staggered mounting of separate assemblies. This merging reduces the overall space occupied by the folding mechanism while maintaining structural simplicity.
2Device complexity
If two steel tubes are riveted together to form an X-shaped assembly with staggered mounting arrangement, then the structure is simple, but the wagon is inconvenient to fold and has reduced attractiveness
Solution Approach 1:
By integrating the front and rear bottom longitudinal tubes into a single X-shaped assembly with direct end-to-end connection, the patent creates a unified folding mechanism. This single-cross structure folds as one unit, improving folding convenience and operational smoothness compared to staggered multi-assembly configurations.
3Strength
If X-shaped double or multi-cross structures are used, then the wagon has sufficient structural strength, but the structure becomes complex and occupies large space
Solution Approach 1:
The patent achieves sufficient structural strength by optimizing the single X-shaped assembly design. The front and rear bottom longitudinal tubes are positioned and dimensioned to provide adequate load-bearing capacity while maintaining structural simplicity. The direct end-to-end connection creates a rigid X-shape that distributes forces effectively without requiring multiple overlapping assemblies.
Data Source
AI summary
A single-cross translational wagon having a tow bar assembly, a single-cross folding assembly, a bottom frame folding assembly, front wheel assemblies and rear wheel assemblies. The tow bar assembly is arranged in front of the single-cross folding assembly. The bottom frame folding assembly is arranged below the single-cross folding assembly. The single-cross folding assembly has a cross inner frame, a cross outer frame, a front wheel supporting tube and a rear wheel supporting tube. The cross inner frame includes an upper cross inner frame part (is in a backward U shape) and first lower cross tubes. The rear ends of the left and right sides of the upper cross inner frame part include the two first lower cross tubes front ends are hinged with the front ends of the first lower cross tubes and the rear ends are hinged with the lower end of the rear wheel supporting tube.