Articulated Vehicle Roof Joint Pitching Control
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Solution Overview
Problem
Existing roof joints in multi-section vehicles allow excessive pitching movements, which can compromise stability and mobility, as they fail to effectively restrict these movements while permitting necessary rotary and rolling movements.
Innovation Solution
A roof joint design featuring a sliding guide aligned in the transverse direction with an elastic restoring element and a tie rod, which builds up restoring forces to prevent pitching movements while allowing rotary and rolling movements, and includes a stop mechanism to limit excessive lateral deflection and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the roof joint allows free movement between carriages, then mobility is improved, but pitching movements cannot be prevented
Solution Approach 1:
The roof joint is segmented into multiple functional components: a sliding guide for transverse movement, an elastic restoring element for pitching control, and a tie rod for longitudinal force transmission. This segmentation allows each component to specialize in controlling specific degrees of freedom, enabling mobility in permitted directions while preventing pitching movements.
Solution Approach 2:
The elastic restoring element acts as an intermediary between the sliding guide and the tie rod. It mediates the interaction between transverse sliding movements and longitudinal restoring forces, allowing the system to permit mobility while actively preventing excessive pitching movements through controlled elastic deformation.
2Stability of the object's composition
If the sliding guide restricts longitudinal movement to prevent pitching, then pitching control is improved, but transverse mobility is reduced
Solution Approach 1:
The sliding guide is designed with dynamic characteristics through the elastic restoring element, which provides different constraints in different directions. The guide allows free transverse sliding movements while building up restoring forces against longitudinal displacements, creating an anisotropic mobility pattern that satisfies both pitching control and transverse mobility requirements.
3Stability of the object's composition
If the elastic restoring element is compressed by the tie rod, then pitching prevention is improved, but device complexity increases
Solution Approach 1:
The elastic restoring element changes its mechanical parameters (stiffness, pre-compression force) based on the position and loading conditions of the tie rod. This parameter change capability allows the system to provide active pitching prevention through controlled elastic deformation, achieving stable pitching control without requiring complex active control systems or multiple rigid components.
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 solution effectively restricts pitching movements, ensuring stability and mobility by absorbing longitudinal forces and allowing desired transverse movements, while maintaining freedom of movement in the vertical direction to prevent stress and enhance vehicle stability.
Implementation Method 1
an elastic restoring element is provided which deforms as a result of a movement of the sliding guide
Data Source
Figure 1~2
Figure 3~6
Figure 7A~7C
AI summary
The hinge has a main support (34) that extends to a carriage (11) and main support (35) that extends to a carriage (12). The main support (34) comprises a pivot (38). A rigid connection is provided between the main supports in the longitudinal direction. The main supports are interconnected over a transversely oriented slide guide (39). The slide guide comprises a cross beam (37) that rests forward and backward against a guide surface. An elastic resetting element is provided by which movement of slide guide is deformed. An independent claim is included for an articulation system.