Vehicular Door Load Transfer Member Mounting
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Solution Overview
Problem
Existing vehicular door designs face difficulties in mounting a load transfer member due to interference with the door beam, particularly when the door beam is located near the lower region, which complicates the insertion and mounting process.
Innovation Solution
The vehicular door design incorporates a narrow-thickness portion near the lower end and a wide-thickness portion above it, with a load transfer member having a projection that securely fits into the narrow-thickness portion and an inclined region that avoids interference with the door beam, allowing for easy mounting and secure engagement with the door body without sacrificing load transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the load transfer member is disposed in the lower region of the door body to improve load transfer efficiency, then the load transfer performance is improved, but the door beam interferes with the insertion of the load transfer member making mounting difficult
Solution Approach 1:
The load transfer member is divided into two distinct parts: a projection portion that fits into the narrow-thickness region near the lower end of the door body, and a transfer member body disposed in the wide-thickness portion above the door beam. This segmentation allows each part to be positioned in a region where it can function effectively without interfering with the door beam, thus resolving the contradiction between achieving good load transfer performance and ensuring easy mounting.
Solution Approach 2:
The invention utilizes the thickness dimension of the door body by creating a narrow-thickness portion and a wide-thickness portion. The load transfer member is designed to span across these different thickness regions, with the projection in the narrow region and the main body in the wide region. This dimensional approach allows the load transfer member to achieve both secure engagement near the lower end and clearance from the door beam, simultaneously improving reliability and ease of manufacture.
2Strength
If the door beam is disposed in the vicinity of the lower region for structural reinforcement, then the door strength is improved, but the load transfer member is likely to interfere with the door beam during insertion
Solution Approach 1:
The door body thickness is locally modified to create a narrow-thickness portion and a wide-thickness portion. The narrow-thickness portion is created specifically near the lower end where the door beam is located, allowing the projection of the load transfer member to be securely held without interfering with the door beam. The wide-thickness portion above provides sufficient space for the transfer member body. This local quality change enables both the door beam to maintain its structural reinforcement function and the load transfer member to be easily inserted.
Data Source
AI summary
Provided is a vehicular door including a load transfer member. The load transfer member includes a transfer member body disposed in a wide-thickness portion in a door body, and a projection projecting downward from the transfer member body. The transfer member body has a lower region whose surface on a door-outer-panel side abuts on, or comes close to, the inner surface of the door outer panel, and an inclined region whose door-outer-panel side surface is inclined to come apart from the door outer panel and whose surface on a door-inner-panel side abuts on, or comes close to, the inner surface of the door inner panel. The thickness of the lower region and the inclined region in a door-thickness direction is set narrower than the width of an insertion portion between the door inner panel and a door beam.