Foldable Three-Wheel Vehicle Battery Layout for Stable Carrying
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Solution Overview
Problem
The existing foldable vehicles with a single wheel on one side and a pair of rear wheels face issues with transportability due to increased moments caused by the battery's gravity when carried in an inclined state.
Innovation Solution
A foldable three-wheeled vehicle design with a swingable front frame and a fixed rear frame, where the battery is positioned between the rear wheels, allowing for easy folding and carrying, and incorporating a holder that facilitates battery attachment and detachment, along with a swing mechanism for stable turning and a cargo bed for additional storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery is supported by the support mechanism between the support shaft and the wheel, then the vehicle structure is compact, but the moment due to gravity of the battery increases when carried in folded state
Solution Approach 1:
The battery position is changed from a horizontal arrangement (between support shaft and wheel) to a vertical arrangement (below the step). This dimensional repositioning moves the battery's gravitational force vector to act closer to the rear wheel contact point with the ground, significantly reducing the moment arm and thus the moment due to gravity when the vehicle is carried in folded state.
2Ease of operation
If the vehicle is designed to be foldable for easy storage, then portability is improved, but the stability during folding and carrying deteriorates
Solution Approach 1:
The battery serves as a counterweight by positioning it below the step and behind the front wheel. Its gravitational force creates a stabilizing moment that counteracts the destabilizing effects during folding and carrying operations. The battery's weight, when properly positioned, acts as a counterbalance that improves overall vehicle stability while maintaining the foldable design for portability.
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
Enhances transportability by reducing the moment caused by the battery's gravity, protects the battery during carrying, and allows for easy attachment and detachment, while maintaining stability and improving turning performance.
Implementation Method 1
a moment due to a gravity of the battery in carrying the vehicle tends to increase
Implementation Method 2
the first frame and the second frame are connected to each other via the shaft portion so as to be rotatable in the up-down direction
Data Source
Figure 1
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Figure 4~5
AI summary
A vehicle (100) includes a front wheel (1) and a rear wheel (2), a placement part (30) extended in a substantially horizontal direction between the front wheel (1) and the rear wheel (2) so that feet of an occupant are placed thereon, a first frame (FL1) rotatably supporting the front wheel (1) and including a steering part (14) arranged above the front wheel (1), a second frame (FL2) rotatably supporting the rear wheel (2) and supporting the placement part (30), a connecting portion (18a) rotatably connecting the first frame (FL1) in an up-down direction relative to the second frame (FL2), and a battery (40) disposed behind the placement part (30).