Blow-Molded Impact Absorber With Controlled Lateral Buckling
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Solution Overview
Problem
Existing impact absorbers with concave ribs that collapse in a bellows-like manner exhibit non-uniform buckling behavior, leading to performance variations during impact absorption.
Innovation Solution
An impact absorber design featuring a hollow blow-molded article with tubular concave ribs and buckling induction sections that cause the ribs to buckle laterally, rather than vertically, thereby controlling buckling behavior and stabilizing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If concave ribs are configured to collapse vertically in a bellows-like manner, then impact absorption is achieved, but buckling behavior is non-uniform causing performance variation
Solution Approach 1:
The patent introduces buckling induction sections at predetermined locations on the concave ribs before impact occurs. These induction sections pre-defect the structure at specific points, guiding the buckling behavior to occur uniformly at these predetermined locations rather than randomly throughout the rib structure, thereby ensuring consistent performance across different impact scenarios
Solution Approach 2:
The patent applies local structural modification by adding buckling induction sections only at specific locations on the concave ribs, rather than uniformly modifying the entire structure. This localized approach creates controlled weak points that guide buckling behavior precisely where needed, maintaining structural integrity elsewhere while ensuring uniform collapse patterns
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 lateral buckling configuration enhances the stability of impact absorption, reducing variations in performance and improving the absorber's ability to manage compressive loads effectively compared to traditional bellows-like collapse designs.
Implementation Method 1
the at least one of the front side concave rib and the back side concave rib is configured to cause at least one of center of gravity of an opening surrounded by an opening edge of the front side concave rib and center of gravity of an opening surrounded by an opening edge of the back side concave rib to buckle in a mode of moving in a direction crossing the axial direction
Implementation Method 2
the front side concave rib and the back side concave rib have distal end portions welded to each other
Data Source
AI summary
An impact absorber that is capable of inhibiting variation in performance by controlling buckling behavior. An impact absorber including a hollow blow molded article, wherein the blow molded article includes a front wall and a back wall separated into front and back and facing each other and a side wall connecting the front wall with the back wall, the front wall includes a tubular front side concave rib formed by indenting the front wall, the back wall includes a tubular back side concave rib formed by indenting the back wall, and the front side concave rib and the back side concave rib have distal end portions welded to each other, at least one of the front side concave rib and the back side concave rib has a buckling induction section formed as origin of buckling for impact absorption.