Vehicle Side Door Bracket Structure for Door Beam Rigidity
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Solution Overview
Problem
Current vehicle side door configurations face challenges in enhancing the attaching rigidity of the door beam to the inner panel for improved safety against side collisions, particularly in distributing impact loads effectively and preventing deformation.
Innovation Solution
A vehicle side door design that incorporates a bracket interposed between the inner panel and the door beam, featuring a beam joint welded in surface contact with the door beam and a panel joint welded with the inner panel, along with a protrusion that interferes with the ratchet mechanism during deformation to prevent door opening, thereby enhancing the coupling strength and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the door beam is directly welded to the inner panel, then the manufacturing process is simple, but the attaching rigidity is insufficient and local stress concentration occurs
Solution Approach 1:
A bracket is introduced as an intermediary component between the door beam and the inner panel. The bracket includes a beam joint that contacts the door beam and a panel joint that contacts the inner panel, distributing the attachment forces and preventing local stress concentration while maintaining manufacturing simplicity through standard welding processes.
2Strength
If a bracket with complex geometry is used to enhance attaching rigidity, then the collision resistance improves, but the manufacturing complexity increases
Solution Approach 1:
The bracket is segmented into distinct functional portions: a beam joint portion for contacting the door beam and a panel joint portion for contacting the inner panel. This segmentation allows each portion to be optimized for its specific function while keeping the overall design manageable and manufacturable through standard processes.
3Strength
If the door beam is made from high-tensile steel with complex molding, then the impact resistance improves, but the manufacturing complexity and cost increase
Solution Approach 1:
The solution uses a composite structure combining the door beam, bracket, and inner panel. The bracket acts as a composite element that enhances the overall impact resistance of the door assembly without requiring the door beam itself to be made from complex high-tensile steel moldings, thereby simplifying manufacturing while maintaining strength.
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 configuration significantly improves the safety of occupants during side collisions by increasing the attaching rigidity of the door beam to the inner panel, ensuring high durability and collision resistance without requiring complex molding of high-tensile steel door beams, and prevents door opening during impacts without additional components.
Implementation Method 1
The bracket includes a beam joint welded in surface contact with an end of the door beam, and a panel joint welded in surface contact with the wall of the inner panel
Data Source
AI summary
A vehicle side door for a vehicle includes an inner panel, a door beam, and a bracket. The inner panel includes a wall extending in a direction intersecting a panel main body extending in a front-rear direction of a vehicle body. The door beam extends in the front-rear direction of the vehicle body and is joined to a front portion of the inner panel and a rear portion of the inner panel. The bracket is interposed between the inner panel and the door beam. The bracket includes a beam joint welded in surface contact with an end of the door beam, and a panel joint welded in surface contact with the wall of the inner panel.