Vehicle Door Beam Load Transmission via Multi-Bracket Segmentation
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Solution Overview
Problem
Conventional vehicle side doors experience load transmission issues when large lateral loads are applied, causing the bracket to peel off from the inner panel and preventing effective load distribution to the door beam.
Innovation Solution
A vehicle door structure with a door beam attached to the inner panel via intersecting surface members and a patch member, which distributes loads in multiple directions, and includes additional brackets and joining members to enhance stability and prevent breakage, while a fourth bracket is positioned to minimize outer panel deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single bracket connects the door beam to the inner panel, then the structure is simple, but the load transmission reliability is insufficient when large lateral loads are applied
Solution Approach 1:
The single bracket connection is segmented into multiple brackets (first bracket with first surface, second bracket with second surface) positioned at different locations and orientations. This segmentation distributes the load transmission paths, preventing single-point failure and improving overall reliability while maintaining manageable structural complexity through modular arrangement.
Solution Approach 2:
The connection structure transitions from a single-plane bracket arrangement to a multi-dimensional configuration where the first bracket extends in one direction and the second bracket extends in another direction. This dimensional expansion creates redundant load paths and improves reliability by distributing forces across multiple spatial dimensions.
2Force
If the bracket is positioned to maximize load transmission, then the load reception efficiency is improved, but the outer panel deformation increases
Solution Approach 1:
The load reception function is segmented between multiple brackets positioned at different locations. The first bracket and second bracket share the load transmission task, allowing the outer panel to deform less at any single location while collectively maintaining high load reception efficiency through distributed support points.
Solution Approach 2:
Each bracket is positioned and oriented to optimize local load transmission characteristics. The first bracket with its first surface and the second bracket with its second surface are configured with specific local geometries and positions that balance load reception efficiency with minimal local deformation of the outer panel.
Data Source
AI summary
A door structure of a vehicle, capable of reliably transmitting a load, is provided. A rear side door (1) includes an inner panel (2) and an elongated door beam (4) that is attached to an outer side of the inner panel (2) in a vehicle width direction of a vehicle body and arranged along a front-rear direction of the vehicle body. The door beam (4) includes a first plate portion (11) of a first bracket (10), which has a first surface intersecting an axis along the vehicle width direction, and a vehicle width direction plate portion (21) of a second bracket (20), which has a second surface intersecting an axis along the front-rear direction of the vehicle body. The door beam (4) is joined to the inner panel (2) via both the first plate portion (11) and a second plate portion (12).