Cargo Bed Rear Fender Flange Attachment Design
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Solution Overview
Problem
Conventional cargo bed designs face challenges in securely attaching attachments due to the placement of resin rear fenders, which can lead to dirtiness from splashed water due to gaps between the fenders and the cargo bed.
Innovation Solution
The cargo bed design features rear fenders that cover the entire lower edge of the second flange portion and expose the first flange portion for direct attachment, preventing gaps and improving attachment security and reducing dirtiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rear fender is made of resin and attached to the side wall portion, then the cargo bed structure is complete and functional, but it becomes difficult to fix attachments strongly because the resin fender is located between the attachment and the flange portion
Solution Approach 1:
The side wall portion is divided into multiple functional regions: the main side wall portion for structural support, the first flange portion for attachment fixation, and the second flange portion for rear fender attachment. This segmentation allows the attachment to be fixed directly to the metal flange portion without the resin fender interfering, while the resin fender is attached to a different region (the second flange portion), thus resolving the contradiction between having a complete cargo bed structure and achieving strong attachment fixation.
2Strength
If part of the rear fender is cut off to expose the flange portion for strong attachment fixation, then attachment can be fixed directly to the flange portion, but a gap is created between the flange portion and the rear fender that allows muddy water to splash out and dirty the outer surfaces
Solution Approach 1:
Instead of cutting the rear fender, the side wall portion is segmented into multiple flange portions. The first flange portion is dedicated for attachment fixation, exposing the metal surface for strong fixation. The second flange portion is dedicated for rear fender attachment, allowing the resin fender to cover the area that would otherwise create gaps. This segmentation resolves the contradiction by providing separate functional zones.
Solution Approach 2:
The second flange portion acts as an intermediary element between the main body and the rear fender. By attaching the rear fender to this intermediate flange portion, the design ensures that the fender covers the transition area completely, preventing gaps and muddy water splashing, while the first flange portion provides the necessary fixation surface for attachments.
3Object-affected harmful factors
If the rear fender covers the entire lower edge of the second flange portion, then dirtiness from splashed water is prevented, but the attachment fixation capability may be compromised
Solution Approach 1:
The side wall portion is segmented into at least two distinct flange portions: the first flange portion that extends from the upper edge of the main side wall and provides attachment fixation capability, and the second flange portion that extends from the outer edge of the first flange portion and allows the rear fender to cover the lower edge area for dirtiness prevention. This segmentation enables both functions to coexist without compromise.
Data Source
AI summary
A cargo bed includes a main body portion made of a material including a metal, and a pair of rear fenders made of a material including a resin and fixed to the main body portion. The main body portion includes a front wall portion extending in an up-down direction and a left-right direction, a bottom portion extending rearward from a lower edge region of the front wall portion, and a pair of side wall portions extending upward from two edge regions in the left-right direction of the bottom portion, and connected to two edge regions in the left-right direction of the front wall portion. The pair of rear fenders are fixed to the pair of side wall portions, respectively. Each of the pair of side wall portions includes a main side wall extending upward from the bottom portion, a first flange portion extending in the left-right direction, from an upper edge of the main side wall to an outside of the main body portion, and a second flange portion extending downward from an outside edge of the first flange portion. Each rear fender covers at least an entire lower edge of the second flange portion.