Bumper Beam Reinforcement via Integrated Cover Plate
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Solution Overview
Problem
Conventional bumper beams face challenges in maintaining structural strength without increasing weight or complexity, particularly in transmitting collision forces to attachment points without collapsing during impacts.
Innovation Solution
A bumper beam design featuring a crossbeam with a U-shaped cross section and a cover plate, where the cover plate includes a reinforcement member attached to its inside, extending between the crossbeam's legs to prevent them from collapsing inward during collisions, thus enhancing structural strength without additional weight or complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional U-shaped crossbeam is used without additional reinforcement, then the weight and complexity remain low, but the structural strength and ability to transmit collision forces is insufficient
Solution Approach 1:
The reinforcement member is integrated with the cover plate to form a single composite component. This merging of functions allows the cover plate to serve both its primary purpose of closing the gap and the additional function of providing structural reinforcement, thereby increasing strength without adding separate reinforcement components and maintaining simplicity.
Solution Approach 2:
The cover plate is designed to perform multiple functions: it closes the aesthetic gap between the U-shaped legs and simultaneously provides structural reinforcement through the integrated reinforcement member. This multi-functionality eliminates the need for separate reinforcement components, resolving the contradiction between strength and complexity.
2Strength
If a longitudinal reinforcement member is added inside the crossbeam, then the structural strength increases, but the weight and complexity increase significantly
Solution Approach 1:
The reinforcement function is merged with the cover plate, eliminating the need for separate internal reinforcement members that would add weight. The cover plate with integrated reinforcement provides the necessary structural support without the additional weight penalty of internal reinforcement components.
Solution Approach 2:
The cover plate serves dual purposes: aesthetic closure and structural reinforcement. This multi-functionality allows the design to achieve increased structural strength without adding dedicated reinforcement components that would increase weight, as the same component (cover plate) performs both functions.
3Strength
If the crossbeam is designed to withstand collisions at different parts, then the structural strength improves, but the complexity of the design increases
Solution Approach 1:
The reinforcement capability is merged into the cover plate structure, allowing a single component design to handle collision forces from multiple locations. This integration simplifies the overall design compared to having separate reinforcement elements positioned at different locations to handle different impact scenarios.
Solution Approach 2:
The cover plate with integrated reinforcement member provides universal structural support that can withstand collisions at different parts of the bumper beam. This multi-functional design allows a single component to address multiple collision scenarios without requiring location-specific reinforcement solutions, thereby maintaining design simplicity.
Data Source
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AI summary
The invention relates to a bumper beam (1) comprising a crossbeam (2) and a cover plate (6) having an elongate shape in a longitudinal direction (L), the cover plate (6) being arranged to be attached to outer portions (4A,5A) of opposed legs (4,5) of the crossbeam (2) to close a gap formed between them. A reinforcement member (10) is attached directly to the inside (6A) of the cover plate (6), the reinforcement member (10) comprising at least two attachment portions (10A) configured to be attached to the inside (6A) of the cover plate (6) at a distance from each other in the longitudinal direction (L) of the cover plate (6), and at least one support portion (10B) configured to extend between the two attachment portion (10A) and at least partly into the space between the legs (4,5) of the crossbeam (2) to support the legs (4,5) from being pressed towards each other when the crossbeam (2) is subjected to external forces.