Tilting Vehicle Cradle Assembly for High-Speed Turn Stability
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Solution Overview
Problem
Current narrow-track vehicles lack stability during high-speed turns due to inadequate shifting of the vehicle's center of gravity and insufficient counterbalancing mechanisms, and they often fail to provide adequate protection from inclement weather or injuries.
Innovation Solution
A narrow track tilting vehicle design featuring an undercarriage with a cradle assembly that allows the upper chassis to pivot and translate laterally, using a swing arm and motion conversion mechanisms to maintain equilibrium during turns, while maintaining wheel contact with the ground, and optionally incorporating a magnetic levitation system for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tilting wheels are used to allow vehicle tilt during turns, then the vehicle can negotiate curves, but the tire contact patch is reduced and stability during high-speed turns deteriorates
Solution Approach 1:
The vehicle system is segmented into independent functional components: the undercarriage with fixed wheels remains separate from the upper chassis that tilts. This allows the wheels to maintain full contact patch while the upper body negotiates curves, resolving the contradiction between cornering ability and stability.
Solution Approach 2:
Instead of tilting the wheels to achieve vehicle tilt (conventional approach), this invention inverts the approach by keeping wheels fixed and tilting the entire upper chassis assembly. This maintains full tire contact while achieving the desired tilt effect for curve negotiation.
2Reliability
If the vehicle center of gravity is shifted laterally to maintain equilibrium during turns, then cornering stability improves, but the complexity of the counterbalancing mechanism increases
Solution Approach 1:
The system uses a counterweight mechanism where the lower chassis assembly acts as a counterbalancing mass that moves laterally in opposition to the upper chassis tilt. This passive counterbalancing achieves cornering stability without complex active control systems.
Solution Approach 2:
The counterbalancing mechanism is designed to automatically respond to centrifugal forces during turns, with the lower chassis and swing arm assembly self-adjusting to maintain equilibrium. This eliminates the need for complex electronic sensors and active control systems.
3Volume of moving object
If a narrow track design is used to improve space efficiency and maneuverability, then vehicle compactness improves, but stability during high-speed turns deteriorates
Solution Approach 1:
The vehicle transitions from a static wheel orientation to a dynamic upper chassis tilt that adapts during turns. The swing arm mechanism allows the upper chassis to dynamically adjust its angle, maintaining stability despite the narrow track width.
Solution Approach 2:
The invention adds a rotational degree of freedom in the lateral dimension by allowing the upper chassis to tilt relative to the undercarriage. This dimensional change enables narrow-track vehicles to achieve stability comparable to wider vehicles during high-speed turns.
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 vehicle achieves improved stability during high-speed turns by effectively counterbalancing centrifugal forces and maintaining wheel contact, while also providing protection from weather and injuries through its design.
Implementation Method 1
A motion conversion mechanism such as a parallelogram linkage is provided for transforming the rotational movement of the crank into lateral movement of the mobile longitudinal axis.
Implementation Method 2
optionally incorporating a magnetic levitation system for enhanced stability
Data Source
AI summary
A narrow track tilting vehicle includes an undercarriage centered over a contact point, an upper chassis configured to pivot about a mobile longitudinal axis, and a cradle assembly configured to allow the mobile axis to move laterally relative to the contact point. In wheeled embodiments, the configuration of the carriage allows the upper chassis to tilt in response to centrifugal forces, while allowing the wheels to remain perpendicular to a level surface along which the vehicle is traveling. When the vehicle is traveling along a surface that is canted relative to the level surface, the configuration of the carriage allows to the upper chassis to remain upright relative to the level surface, and the wheels to extend perpendicular to the canted surface.