Modular ATV Steering and Suspension for Variable Terrain Widths
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Solution Overview
Problem
Existing ATVs face challenges in accommodating varying terrain conditions and passenger comfort due to fixed frame and suspension designs, limiting versatility and ergonomic adjustments.
Innovation Solution
The ATV features interchangeable front and rear suspensions, adjustable steering systems, and a modular frame design allowing for 48" and 55" widths, with components like power steering units and rack-and-pinion systems to enhance maneuverability and ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed frame and suspension design is used, then the structural simplicity is maintained, but the adaptability to varying terrain conditions and passenger comfort is limited
Solution Approach 1:
The suspension system is divided into multiple independent components including front suspension assemblies, rear suspension assemblies, and interchangeable suspension kits. Each suspension component can be independently selected and adjusted based on terrain requirements, allowing the vehicle to adapt to different conditions without redesigning the entire frame structure.
Solution Approach 2:
The suspension system incorporates adjustable elements such as variable spring rates, adjustable shock absorbers, and interchangeable suspension components that allow dynamic adjustment of suspension characteristics. This enables the vehicle to optimize its performance for different terrain conditions and loading scenarios.
2Adaptability or versatility
If interchangeable suspensions and modular frame design are implemented, then the adaptability across different terrains is improved, but the device complexity increases
Solution Approach 1:
The frame design incorporates universal mounting points and standardized interfaces that allow multiple suspension configurations to be used with a single frame. The power train components are designed to accommodate different suspension geometries, enabling one frame to support multiple terrain-specific suspension setups.
Solution Approach 2:
The modular suspension system allows change of key parameters such as suspension travel, spring rates, and geometry through interchangeable components. By changing suspension kits with different parameter specifications, the vehicle can be optimized for various terrains without modifying the fundamental frame structure.
3Ease of operation
If adjustable steering systems are used, then the maneuverability and ergonomics are enhanced, but the steering system complexity increases
Solution Approach 1:
The steering system incorporates adjustable elements including variable steering ratios, adjustable steering column position, and configurable steering geometry. These dynamic adjustments allow optimization of steering characteristics for different operating conditions and rider preferences.
Solution Approach 2:
The power steering unit acts as an intermediary between the rider's steering input and the front wheel orientation. It provides assistive torque and can be adjusted to provide different levels of power assistance, making the steering system easier to operate across various terrain conditions.
4Adaptability or versatility
If the frame width is made adjustable for 48" and 55" configurations, then the versatility is improved, but the manufacturing complexity increases
Solution Approach 1:
The frame is constructed from modular sections with standardized connection points that allow reconfiguration between different width settings. The frame components can be segmented and reassembled in different configurations, enabling production of multiple width variants from the same basic frame set.
Solution Approach 2:
The frame width parameter can be changed by selecting different frame rail lengths or adjusting the position of frame components. This allows the same frame design to produce both 48-inch and 55-inch width configurations through parameter variation rather than complete redesign.
Data Source
AI summary
An ATV is shown having a steering system comprised of a power steering unit having drive and driven pitman arms coupled to a drag link. The drive pitman arm is laterally offset from a vehicle centerline and is driven by the power steering unit. An alternate power steering system includes a pack and pinion subassembly coupled to a power steering motor, which then couples to steering arms of the ATV.