Flexible Skateboard with Twistable Deck and Caster Wheels
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Solution Overview
Problem
Conventional skateboard designs require users to lift a foot to propel themselves and lack flexibility and control, with complex and costly designs that interconnect front and rear platforms with torsion bars.
Innovation Solution
A one-piece flexible skateboard with a twistable platform, featuring wider foot support areas and a narrower central section, allowing users to twist the board to add energy to caster wheels for propulsion and steering, with adjustable resistance and self-centering torsion springs for improved control and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional skateboard designs are used, then the structure is simple and easy to manufacture, but the user must lift a foot to propel and lacks flexibility and control
Solution Approach 1:
The skateboard deck is divided into distinct functional zones: front foot support area, rear foot support area, and central section. This segmentation allows independent optimization of each zone - the central section is made narrower and more flexible for twisting motions, while the foot support areas remain wider and more rigid for stability, resolving the contradiction between flexibility and structural simplicity
Solution Approach 2:
Different sections of the skateboard deck are given different structural properties. The central section has reduced width and increased flexibility to enable twisting for propulsion, while the foot support areas maintain greater width and rigidity for user stability. This local differentiation provides both flexibility for control and structural simplicity in each specific zone
2Adaptability or versatility
If platforms are interconnected with torsion bars to permit twisting, then flexibility and control are improved, but complexity and cost increase
Solution Approach 1:
The support structures under the foot areas and the central section are merged into a single integrated one-piece deck. This eliminates the need for separate torsion bars and complex interconnections between platforms, while still providing the desired twisting flexibility in the central section through its narrowed geometry and material properties
Solution Approach 2:
The one-piece deck structure serves multiple functions simultaneously: it provides structural support, enables twisting flexibility for propulsion, offers lateral stability for steering, and maintains user comfort. This multi-functionality eliminates the need for separate specialized components like torsion bars, reducing overall complexity
3Productivity
If the central section is made narrower to permit twisting, then propulsion efficiency is improved, but the resistance to twisting must be controlled to provide feedback
Solution Approach 1:
The central section's twisting resistance is designed to be dynamic rather than fixed. As the user applies twisting force for propulsion, the narrowed central section provides initial resistance that gives tactile feedback, then yields to allow the twisting motion. This dynamic response provides both propulsion efficiency and user feedback for control
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
Enables efficient propulsion and steering by altering the angle of weight distribution on caster wheels, providing feedback and reducing user fatigue through controlled twisting resistance, allowing operation as both a flexible and non-flexible skateboard.
Implementation Method 1
a pair of caster assemblies, each having a single caster wheel mounted for rolling rotation
Implementation Method 2
self-centering torsion springs for improved control and comfort
Data Source
AI summary
A flexible skateboard may include a pair of direction casters mounted for steering rotation a twistable one piece skateboard. A center section may be made sufficiently narrower than outboard foot support areas which may be twisted by a rider to add energy for rolling motion to wheels in the casters. The center section may also be made sufficiently resistant to twist so that the skateboard may be ridden as a conventional, non-flexible skateboard.