Door Impact Bar Bracket With Deformation Induction Part
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Solution Overview
Problem
Conventional door impact bar attachment structures face limitations in impact absorption due to the increased height of the leg part, which tends to fall during broadside collisions, restricting the effectiveness of the impact absorption effect.
Innovation Solution
The attachment structure incorporates a bracket with a deformation induction part in the leg part, allowing deformation when a collision load is applied, preventing the leg part from falling and enhancing the impact absorption effect by distributing the load effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door impact bar is arranged near the outer panel to reduce fault value, then the impact protection effect is improved, but the leg part height increases causing it to fall during collision
Solution Approach 1:
The deformation induction part is pre-formed in the leg part at a location that will experience high stress during collision. This preliminary structural feature ensures that when collision occurs, deformation occurs at the predetermined location rather than causing the leg part to fall, thus maintaining stability while achieving impact protection.
Solution Approach 2:
The leg part's structural parameters are modified by introducing a deformation induction part with specific geometric features (such as reduced thickness or specific cross-sectional shape). This changes the mechanical properties of the leg part, allowing it to deform in a controlled manner during collision, preventing catastrophic failure while maintaining the necessary height for impact protection.
2Length of stationary object
If the leg part height is increased to accommodate the distance between inner and outer panels, then the impact bar positioning is improved, but the leg part becomes prone to falling during collision
Solution Approach 1:
The deformation induction part is pre-formed in the leg part at a location that will experience high stress during collision. This preliminary structural feature ensures that when collision occurs, deformation occurs at the predetermined location rather than causing the leg part to fall, thus maintaining stability while achieving impact protection.
Solution Approach 2:
The leg part's structural parameters are modified by introducing a deformation induction part with specific geometric features (such as reduced thickness or specific cross-sectional shape). This changes the mechanical properties of the leg part, allowing it to deform in a controlled manner during collision, preventing catastrophic failure while maintaining the necessary height for impact protection.
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 deformation induction parts in the leg part prevent the bracket from acting as a fulcrum, improving the door impact bar's impact absorption capability and reducing manufacturing costs through easier processing and design.
Implementation Method 1
a deformation induction part, in which deformation is induced at the time of applying a collision load to the door impact bar, is provided an intermediate part of the leg part
Data Source
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AI summary
When a collision load by broadside collision is applied to a door impact bar 18 through an outer panel 22 of a door 10, the collision load applied to the door impact bar 18 is applied to an inner panel 20 through a distal part 30, a leg part 32 and a base 28 of a bracket 24. In this case, the leg part 32 of the bracket 24 receives the collision load and when the collision load exceeds a predetermined value, deformation of the leg part 32 is induced in places of deformation induction parts 34 and a pair of distal part leg pieces 3202B is deformed at the deformation induction parts 34 as boundaries.