Front Bumper Inner Structure for Rigidity and Reaction Force Balance
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Solution Overview
Problem
The existing front bumper designs face challenges in maintaining the bumper body's position without excessive deformation due to the weight of the bumper itself, leading to potential downward displacement and increased rigidity around the bumper stay, which can result in localized high reaction forces when external forces are applied.
Innovation Solution
Incorporating a vertically extending reinforcing wall along the peripheral edge of the bumper stay and forming cuts along the inner body's edges near the bumper stay to reduce local rigidity, while maintaining sufficient support and preventing excessive deformation, and optionally including electronic devices accessible through these cuts for easier maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reinforcing wall is provided along the peripheral edge of the bumper stay base plate to increase bumper stay rigidity, then downward displacement of the bumper body is prevented, but the overall rigidity of the bumper inner becomes locally high around the bumper stay
Solution Approach 1:
The patent applies local quality by providing a reinforcing wall only at specific locations (peripheral edge of the base plate) rather than uniformly throughout the bumper stay structure. This localized reinforcement increases rigidity where needed to prevent downward displacement while avoiding excessive rigidity in other areas that would generate high reaction forces.
Solution Approach 2:
The patent changes the rigidity parameter of the bumper stay by adding a reinforcing wall with specific dimensional parameters (thickness, height, position). This modifies the structural properties to achieve the desired balance between preventing downward displacement and avoiding localized high reaction forces.
2Stability of the object's composition
If the inner body is made long in the lateral direction to support the bumper body along the entire length, then the bumper body position is properly held, but the inner body requires high rigidity to reduce downward bending and twisting at both ends
Solution Approach 1:
The patent segments the inner body structure by dividing it into multiple parts (left and right inner bodies connected by a connecting portion). This segmentation allows each segment to be optimized independently, providing sufficient rigidity where needed while reducing overall rigidity requirements through the flexible connection between segments.
Solution Approach 2:
The patent introduces dynamic characteristics by making the connecting portion flexible rather than rigid. This allows the inner body structure to adapt to external forces and deformations, reducing the need for high overall rigidity while maintaining proper bumper body positioning through the coordinated action of the segmented structure.
Data Source
AI summary
A front bumper includes a bumper body and a bumper inner. The bumper body is exposed to the outside of a vehicle. The bumper inner is located inside the bumper body. The bumper inner includes an inner body that extends in a lateral direction of the vehicle along an inner surface of the bumper body, and at least one bumper stay that extends from the inner body toward a body of the vehicle and that is fixed to the body. The bumper stay includes a base plate that is joined to the body, and a reinforcing wall that extends in a vertical direction from a peripheral edge of the base plate. The inner body includes a cut along either or both of upper and lower edges of the inner body that extend in the lateral direction, the cut extending in a range including a position closest to the bumper stay.