Bottom Double-Cross Trailer With Sliding Supports for Stable Folding
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Solution Overview
Problem
Current folding trailers have limited cargo space and weight capacity due to a single set of bottom cross tubes, which are structurally unstable when folded, leading to gaps and reduced stability.
Innovation Solution
A bottom double-cross trailer design featuring two vertical poles with interconnected support rods and cross rods that rotate and slide, maintaining stability and increasing cargo space without increasing height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single set of bottom cross tubes is used, then the structure is simpler, but the cargo space and weight capacity are limited
Solution Approach 1:
The bottom cross tube structure is segmented into two separate sets (first bottom cross tube group and second bottom cross tube group), each forming an independent X-shaped configuration. This segmentation allows the trailer to achieve greater cargo space and weight capacity by distributing loads across multiple structural elements rather than relying on a single cross tube set.
2Stability of the object's composition
If flexible metal hanging rods are used, then flexibility is achieved, but right-angle bends cannot be formed resulting in significant gaps when folded
Solution Approach 1:
The hanging rod is designed with a sliding connection mechanism that allows it to dynamically adjust its length and position. During folding, the hanging rod can slide to accommodate changing distances between connection points, maintaining structural stability while enabling compact folding without requiring rigid right-angle bends.
Solution Approach 2:
A sliding sleeve acts as an intermediary component between the hanging rod and the vertical poles, allowing the hanging rod to maintain stable connections while accommodating the dimensional changes that occur during folding and unfolding operations.
3Ease of operation
If sliding hanging rod is used, then folding is easier, but structural stability is reduced
Solution Approach 1:
The sliding sleeve serves as an intermediary that combines the benefits of both rigid and flexible connections. It allows the hanging rod to slide freely during folding operations for ease of operation, while simultaneously providing structural support and stability when the trailer is in its loaded, unfolded state.
4Volume of moving object
If bottom cross tubes are increased to improve capacity, then cargo space increases, but the height increases when folded
Solution Approach 1:
The bottom cross tube groups are designed to nest within the vertical pole structures when folded. The X-shaped configurations allow the cross tubes to collapse inward and nest against the vertical poles, significantly reducing the folded height while maintaining the structural capacity to support large cargo volumes when unfolded.
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 enhances cargo capacity and load-bearing capability by providing structural stability and preventing collapse under weight, allowing for larger and heavier items to be carried.
Implementation Method 1
a sliding sleeve that slides up and down along their surface
Implementation Method 2
both of which rotate in conjunction with the upper fixing sleeve
Data Source
AI summary
This application relates to folding trailers, specifically a bottom double-cross trailer. It has two first and two second vertical poles. Left and right support rods are between the two first vertical poles, and front and rear support rods are between the first and second vertical poles. A hanging rod is in the middle of the front and rear support rod group, with symmetrical left and right bottom cross rod groups on each side. The left bottom cross rod group connects to the first vertical pole, and the right to the second. The hanging rod's bottom is fixed to a base support piece. The left and right bottom cross rod groups connect via the hanging rod, and their attachment points to the base support piece rotate. The hanging rod provides upward tension to prevent collapse under load, enhancing load-bearing capacity.