Spherical-Wheel Vehicle Steering With Automatic Balance Correction
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Solution Overview
Problem
Conventional vehicles with spherical wheels for young children are difficult to control, and existing steering mechanisms do not facilitate balance development or automatic correction for loss of balance.
Innovation Solution
A vehicle design featuring a rear ground-engaging sphere that rotates about multiple axes, connected to a support pivotable about a third axis, with a resilient biasing mechanism to return to a neutral position, allowing intuitive balance correction and adjustable steering resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rear sphere is mounted on a support that is pivotally connected to the frame and extends longitudinally and downwardly (as in WO 2016/009184), then a passive steering mechanism is provided that assists young riders in developing motor skills, but the vehicle lacks active steering control and automatic balance correction
Solution Approach 1:
The support is made dynamically pivotable about a third axis (longitudinal axis) in addition to the transverse second axis, allowing the rear sphere to actively change orientation and provide both passive steering assistance and active steering control. This dynamic capability enables the vehicle to automatically correct balance and respond to rider input.
Solution Approach 2:
A resilient biasing mechanism is introduced to actively control the orientation of the support relative to the frame, allowing adjustment of the steering characteristics and balance correction force. This parameter change enables tuning of the vehicle's behavior to match rider skill levels and provides automatic balance correction through controlled resilient forces.
2Ease of operation
If conventional balance bikes are used with fixed handlebars and single-axis front wheels, then the structure is simple, but very young children (up to two years old) find the vehicle too difficult to control
Solution Approach 1:
The rear sphere is equipped with dual-axis rotation capability (transverse second axis and longitudinal third axis via pivotal support), making it dynamically adaptable to rider input and ground conditions. This enhanced dynamics allows very young children to more easily control the vehicle while maintaining manageable complexity through the use of spherical geometry and resilient biasing.
3Reliability
If the support is made pivotable about a third axis with a resilient biasing mechanism, then automatic balance correction and adjustable steering resistance are provided, but the device complexity increases
Solution Approach 1:
The resilient biasing mechanism provides automatic balance correction without requiring active rider input or external control systems. The mechanism self-regulates the support orientation to correct balance deviations, providing reliable balance assistance while maintaining relatively simple mechanical construction through the use of elastic resilience.
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 balance development and automatic correction for loss of balance, providing an adjustable riding experience suitable for varying skill levels and growth stages of young riders.
Implementation Method 1
a resilient biasing mechanism configured to resiliently bias the support towards the neutral position
Implementation Method 2
a rear ground-engaging sphere which is rotatable about a plurality of axes
Data Source
AI summary
A vehicle includes a frame, a front ground-engaging sphere, a rear ground-engaging sphere, and gripping portions for a rider to hold. The front sphere is rotatable about a first axis which is transverse and fixed relative to the frame and the rear sphere is rotatable about a plurality of axes. The vehicle also includes a support, which is connected pivotally to a rear portion of the frame. The rear sphere is connected to the support for rotation about a second axis which is transverse and fixed relative to the support. The support is pivotal with respect to the frame about a third axis which extends downwardly and longitudinally of the vehicle, such that the support is pivotable through a range of positions including a neutral position wherein the first and second axes are parallel. The vehicle further includes a resilient biasing mechanism configured to resiliently bias the support towards the neutral position.