Cowl Top Garnish Protruding Portion Shock Absorption
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Solution Overview
Problem
The existing cowl top garnish lacks effective restriction of distance reduction between its segments under load and has limited shock-absorbing capabilities when subjected to impacts.
Innovation Solution
A cowl top garnish design featuring a protruding portion with a front segment and rear segment that spread under load, where one segment has a projecting portion that abuts a load-receiving portion, allowing for enhanced load transmission and shock absorption, while maintaining flexibility to prevent hindrance during spreading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bridging member is secured to both front and rear segments, then the structural strength is improved, but the shock absorbing capability deteriorates because the segments cannot spread freely under load
Solution Approach 1:
The bridging member is divided into a first bridging member and a second bridging member that are separated by a gap. This segmentation allows each bridging member to independently engage with the segments while permitting relative movement, thus maintaining structural strength while enabling shock absorption through controlled spreading of the front and rear segments.
Solution Approach 2:
The hole formed in the protruding portion serves as an intermediary mechanism between the bridging members and the segments. The bridging members engage with this hole to transmit loads while the geometry of the hole and the gap between bridging members allow controlled movement, mediating between the need for strength and the need for shock absorption.
2Reliability
If the protruding portion is made flexible to allow spreading, then the shock absorbing capability is improved, but the restriction of distance reduction between segments deteriorates
Solution Approach 1:
The system transitions from a static rigid connection to a dynamic system where the first and second bridging members can move relative to each other within the hole. This dynamic configuration allows the structure to adapt to applied loads by permitting controlled spreading while maintaining distance restriction through the geometric constraints of the hole and the engagement mechanism.
3Stability of the object's composition
If the claw engages deeply with the hole to prevent disengagement, then the structural stability is improved, but the shock absorption capability deteriorates due to hindered spreading movement
Solution Approach 1:
The engagement geometry is designed with local quality differentiation: the bridging members have claw-shaped ends that engage with the hole to provide stable connection, while the gap between the bridging members and the specific geometry of the hole allow controlled movement. This local differentiation of engagement characteristics enables both stability and shock absorption.
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 design effectively restricts distance reduction between segments, enhances shock absorption, and ensures reliable load transmission, preventing twisting and bending, with improved noise reduction through cushioning material integration.
Implementation Method 1
the protruding portion 110 is a flexible portion that allows the front segment 112 and the rear segment 113 to expand or spread when a load acts on the protruding portion 110 from above the top 111
Implementation Method 2
The protruding portion 110 is a flexible portion that allows the front segment 112 and the rear segment 113 to expand or spread
Data Source
AI summary
A cowl top garnish includes a protruding portion that protrudes upward, with its top being situated at an upper position when a vehicle body is viewed in a lateral cross-sectional view. The protruding portion has a front segment that is disposed in along the width of the vehicle and extends from the top in a lower forward direction, and a rear segment that extends from the top in a lower backward direction. The protruding portion is an element having flexibility that allows the front segment and the rear segment to spread when a load acts on the protruding portion from above the top. The front segment has a projecting portion that projects toward the rear segment. The rear segment has a load receiving portion onto which the projecting portion abuts to receive the load when the load acts on the front segment in the backward direction.