Roll Block System for Three-Wheeled Vehicle Forecarriage
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Solution Overview
Problem
Existing roll block systems for three-wheeled motor vehicles with articulated quadrilateral steering structures are complex and require multiple blocking devices, making them mechanically intricate and costly to produce and implement.
Innovation Solution
A roll block system utilizing a single or dual extensible rod that connects front wheels to the forecarriage frame, allowing passive movement and reversible blocking of rolling movements without interfering with steering, thus simplifying the mechanism and reducing the number of required components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional roll block systems with multiple blocking devices are used, then rolling movements are effectively blocked, but the device complexity increases and manufacturing cost rises
Solution Approach 1:
The patent combines multiple blocking functions into a single blocking device that acts on the articulated quadrilateral structure. Instead of using separate blocking devices for each wheel or suspension component, one unified blocking mechanism is implemented that can prevent rolling movements of the entire forecarriage assembly, thereby reducing device complexity while maintaining blocking effectiveness
Solution Approach 2:
The blocking device is designed to perform multiple functions: it blocks rolling movements, maintains vehicle stability, and works with the articulated quadrilateral steering mechanism. This multi-functional design eliminates the need for separate dedicated blocking mechanisms for each function, reducing the overall number of components required
2Reliability
If multiple blocking devices are installed on each wheel and suspension, then rolling is prevented, but the ease of manufacture decreases
Solution Approach 1:
The patent merges multiple blocking functions into a single blocking device that acts on the articulated quadrilateral structure. Instead of using separate blocking devices for each wheel or suspension component, one unified blocking mechanism is implemented that can prevent rolling movements of the entire forecarriage assembly, thereby reducing device complexity while maintaining blocking effectiveness
Solution Approach 2:
The blocking device is integrated with the articulated quadrilateral structure, which is already a segmented mechanical system. By utilizing the existing segmented structure of the quadrilateral linkage, the blocking function is incorporated into one of the existing segments rather than adding separate blocking components to each segment, simplifying the overall assembly process
Data Source
AI summary
A forecarriage (8) of a rolling motor vehicle (4), comprising a forecarriage frame (16), at least a pair of front wheels (10″), each wheel (10″) being connected to a rolling kinematic mechanism (20), which enables the front wheels (10″) to roll in a synchronous and specular manner, by means of a respective axle journal (60), and a roll block system (100) comprising a rod extensible in length (110) which directly connects one of the two front wheels (10″) at the respective axle journal (60) to said forecarriage frame (16) by means of hinging means (71, 72, 73) at both its ends, and means (120) to reversibly block the lying position of said rod extensible in length (110) on a rolling plane with respect to said axle journal (60) and to said forecarriage frame (16), so as to block the rolling movements allowed by said rolling kinematic mechanism (20).