Vehicle Roof Panel Guide Rail Mechanism for Noise Reduction
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Solution Overview
Problem
Conventional vehicle roof panel assemblies experience sudden load changes during opening and closing, leading to noise emissions and the need for additional elements like rubber brakes to manage Z-tolerances and sealing pressures.
Innovation Solution
The proposed arrangement uses a guide rail system with a deployment lever and raising rod connected via pivot bearings and guide elements, allowing controlled movement and reduced preload, eliminating sudden load changes and the need for additional braking elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional lifting mechanisms are used with rigid connections, then the structural strength is improved, but sudden load changes occur causing noise emissions
Solution Approach 1:
The patent applies dynamics by replacing rigid fixed connections with articulated linkages that can dynamically adapt to load changes. The lifting mechanism uses movable joints and articulated arms that allow controlled movement and load distribution, preventing sudden load transfers that cause noise while maintaining structural integrity throughout the opening and closing sequence.
Solution Approach 2:
The patent implements beforehand cushioning by designing the lifting mechanism to gradually distribute and absorb load changes before they occur. The articulated linkages and guide elements are positioned to preemptively manage force transitions, cushioning the impact of load changes on the cover and preventing noise-generating sudden movements.
2Reliability
If additional elements like rubber brakes are added to manage Z-tolerances, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent applies taking out by removing the need for additional braking elements and tolerance compensation devices. The guide elements and articulated linkages are designed to inherently accommodate Z-tolerances and control the lifting motion without requiring separate rubber brakes or damping components, thereby maintaining reliability while reducing overall device complexity.
Solution Approach 2:
The patent implements universality by designing multi-functional guide elements and linkages that simultaneously perform multiple functions: guiding the lifting motion, accommodating Z-tolerances, controlling load distribution, and preventing unwanted movements. This eliminates the need for separate dedicated components for each function, reducing complexity while maintaining reliability.
3Stability of the object's composition
If the guide elements are fixed in deep positions, then the stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies another dimension by transitioning from fixed two-dimensional guide tracks to three-dimensional articulated linkages with multiple degrees of freedom. The guide elements can move along multiple axes and adapt their position spatially, providing stability through geometric constraints rather than fixed deep positioning, thereby reducing manufacturing precision requirements while maintaining stability.
Solution Approach 2:
The patent implements parameter changes by allowing the guide elements and linkages to dynamically change their geometric parameters (positions, angles, orientations) during operation. This adaptability enables the system to maintain stability through variable configuration rather than fixed precise positioning, reducing the stringency of manufacturing precision requirements.
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
This solution reduces noise emissions by managing load changes smoothly and eliminates the requirement for additional elements like rubber brakes, ensuring a simple and secure construction of the vehicle roof panel assembly.
Implementation Method 1
The support rod (105) and the support lever (106) are connected to one another in a pivotable manner by means of a pivot bearing (113)
Implementation Method 2
The support lever (106) is guided by a guide element (107, 109, 111) in a corresponding guide track (108, 110, 112)
Data Source
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Figure 5~6
AI summary
An arrangement comprising a cover (102) for a vehicle roof (103) has: – a guide rail (104) which extends along a vehicle longitudinal direction (X), – a raising rod (105) which is displaceable along the vehicle longitudinal direction (X) relative to the guide rail (104), – a rear raising lever (106) with respect to the vehicle longitudinal direction (X), which is coupled pivotably to the cover (102), and which – is guided with a first guide element (107) in a first slotted link (108) which is fixed in position with respect to the guide rail (104), – is guided with a second guide element (109) in a second slotted link (110) which is fixed in position with respect to the guide rail (104), – is provided with a third guide element (111) in a third slotted link (112) which is fixed in position with respect to the guide rail (104), and – is coupled to the raising rod (105) by means of a rotary bearing (113).