Reconfigurable Wheel-Track Assembly for On-the-Fly Terrain Switching
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Solution Overview
Problem
Wheeled vehicles face challenges in accessing extreme off-road terrains and struggle with speed and maneuverability when converted to tracked vehicles, as existing conversion methods are cumbersome and limit top speed.
Innovation Solution
A Reconfigurable Wheel-Track (RWT) mechanism that transforms from a wheel to a track and vice versa on-the-fly, utilizing a differential gearbox and braking system to facilitate shape transitions while in motion, allowing for quick adaptation between modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wheeled vehicle is converted to a tracked vehicle using commercial track conversion kits, then the vehicle can access extreme off-road terrains, but the top speed is limited to 45 mph or less and the conversion process takes an hour or more
Solution Approach 1:
The patent applies dynamics by enabling the wheel assembly to dynamically reconfigure between wheeled and tracked modes while the vehicle is in motion. The support members can rotate and reposition themselves to transform the circular wheel shape into an elongated track shape, allowing the vehicle to adapt its terrain-contact configuration without stopping or undergoing manual conversion
Solution Approach 2:
The patent implements universality by designing a single wheel assembly that performs multiple functions: it operates as a traditional wheel for high-speed travel on paved surfaces and transforms into a track for extreme off-road terrain access. This multi-functional design eliminates the need for separate wheel and track systems, allowing one assembly to handle both speed and terrain adaptability requirements
2Adaptability or versatility
If a wheeled vehicle is converted to a tracked vehicle using commercial track conversion kits, then the vehicle can access extreme off-road terrains, but the conversion process takes an hour or more
Solution Approach 1:
The patent applies dynamics by enabling the wheel assembly to dynamically reconfigure between wheeled and tracked modes while the vehicle is in motion. The support members can rotate and reposition themselves to transform the circular wheel shape into an elongated track shape, allowing the vehicle to adapt its terrain-contact configuration without stopping or undergoing manual conversion
Solution Approach 2:
The patent implements self-service through an automated reconfiguration mechanism where the support members are actuated by a motor assembly to automatically transform between wheel and track configurations. The system self-manages the transformation process without requiring external manual intervention, removing parts, or complex assembly procedures
3Adaptability or versatility
If the support members are allowed to rotate freely to enable on-the-fly transformation, then the wheel can convert between modes while in motion, but the uncontrolled rotation would cause instability and loss of control
Solution Approach 1:
The patent implements feedback through a braking mechanism that provides controlled resistance to the rotation of support members. The braking mechanism receives actuation signals to engage or disengage at appropriate moments, creating a feedback loop that regulates the transformation process. This ensures the support members rotate only when and how needed, maintaining stability and preventing uncontrolled movement
Solution Approach 2:
The patent applies parameter changes by using the braking mechanism to control the rotational speed and position parameters of the support members during transformation. By adjusting the braking force, the system can precisely control the rate and extent of rotation, ensuring stable and reliable transformation between wheel and track modes while maintaining overall system control
Data Source
AI summary
The Reconfigurable Wheel-Track (RWT) device is a novel mechanism that allows a wheel to transform into a track, and vice versa. The wheel mode allows a vehicle to travel quickly over smooth and semi-rough terrain, then, on-the-fly, transform rapidly into a powered track mode for crossing extreme terrain. The reconfigurable wheeltrack device comprises several main components: an outer tire/tread, a drive mechanism for driving the tread when in track mode and a reconfiguration mechanism that facilitates the transformation from wheel mode to track mode and vice versa. The reconfigurable wheel-track includes sensing, actuation, and controls to facilitate efficient and effective transitions, and securely maintain each wheel and track shape.