Foldable Wagon Frame Cross-Folding Mechanism Storage Space
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Solution Overview
Problem
Existing foldable wagons face a challenge in maximizing storage space without increasing the overall volume of the wagon, which is limited by the need for connecting rods on both sides of the frame.
Innovation Solution
A foldable wagon frame design that eliminates the need for connecting rods by utilizing a horizontal support frame and a cross-folding frame, allowing for increased storage space without expanding the wagon's volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connecting rods are arranged on two sides of the wagon frame to form a scissors cross mechanism, then the folding function is realized, but the storage space is limited and the volume becomes excessively large
Solution Approach 1:
The patent removes the connecting rods from the two sides of the wagon frame, extracting the problematic elements that limited storage space. The folding function is maintained through alternative structural arrangements of the frame members themselves, eliminating the need for separate connecting rods and thus increasing usable storage volume.
Solution Approach 2:
The patent merges the folding mechanism directly into the frame structure by having frame members hinge to each other. Instead of separate connecting rods forming a scissors mechanism, the frame members themselves perform both structural support and folding functions, reducing overall volume and increasing storage space.
2Volume of moving object
If the chassis of the foldable wagon is enlarged to provide more storage space, then the storage capacity increases, but the volume of the foldable wagon becomes excessively large
Solution Approach 1:
The patent employs a dynamic folding mechanism where the frame members can transition between extended and collapsed positions through hinged connections. This allows the wagon to provide large storage space during use while reducing to a compact form for storage, avoiding the need for a permanently large chassis.
Solution Approach 2:
The patent utilizes spatial reconfiguration through hinged connections that allow frame members to fold in multiple directions. By changing the dimensional arrangement of frame members from a rigid extended structure to a flexible multi-dimensional folding structure, the wagon achieves both large storage capacity and compact folded volume.
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 effectively increases storage space by eliminating the need for connecting rods, maintaining the compact volume of the foldable wagon when folded, and ensuring sufficient bearing strength through the horizontal and cross-folding frames.
Implementation Method 1
One of the front folding rods is hingedly connected with a corresponding rear folding rod with a middle horizontal hinge shaft. The front cross rod and the rear cross rod are hingedly connected with each other through a vertical hinge shaft.
Data Source
AI summary
A foldable wagon frame has a front wheel frame hingedly connected with a rear wheel frame to form a horizontal support frame when the frame is expanded. A lower part of the front wheel frame has at least two front folding rods, and a lower part of the rear wheel frame has at least two rear folding rods. A front folding rod and corresponding rear folding rod are hinged by a middle horizontal hinge shaft. A cross-folding frame is arranged below the horizontal support frame. The cross-folding frame includes a front cross rod and a rear cross rod. The front cross rod is connected with a lower end of the front wheel frame. The rear cross rod is connected with the lower part of the rear wheel frame. The front cross rod and the rear cross rod are hinged with each other through a vertical hinge shaft.