Outboard Motor Splash Guard Segmentation
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Solution Overview
Problem
Conventional outboard motors with integral splash guards by casting face challenges in manufacturing due to increased weight and complexity, and difficulty in replacing smaller splash guards.
Innovation Solution
A separate splash guard design that is attached to the upper case, allowing for easier manufacturing and replacement, comprising a forward-projecting upper plate and an attachment mechanism that is detachable from the upper and lower cases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the splash guard is enlarged to improve splash suppression effect, then the splash suppression efficiency is improved, but the weight increases and manufacturing becomes difficult
Solution Approach 1:
The splash guard is divided into an upper case, a lower case, and a separate splash guard component. The splash guard is further segmented into a plate portion and a protruding portion. This segmentation allows each component to be manufactured independently with optimized weight and size, avoiding the need to manufacture a single large heavy integral structure while still achieving the desired splash suppression effect through coordinated arrangement of multiple lighter components.
2Strength
If the splash guard is integral with the upper case by casting, then the structural strength is improved, but the replacement flexibility is reduced
Solution Approach 1:
The splash guard is designed as a separate component that can be detached from both the upper case and lower case, while the upper case and lower case are connected through a detachable attachment mechanism. This segmentation enables the splash guard to be replaced independently without replacing the entire upper case, providing flexibility to select different splash guard sizes or designs based on specific usage conditions or model requirements while maintaining structural integrity during assembly.
3Ease of manufacture
If the splash guard is integral with the upper case by casting, then the manufacturing process is simplified, but the manufacturing equipment becomes large and complex
Solution Approach 1:
The splash guard is manufactured as a separate component from the upper case and lower case, which can be produced using smaller, more manageable casting equipment or other manufacturing processes. The attachment mechanism connects these separately manufactured components. This approach avoids the need for large-scale integral casting equipment while maintaining manufacturing efficiency through standardized connection interfaces and assembly procedures.
4Weight of moving object
If a small splash guard is used to reduce weight, then the manufacturing becomes easier, but the splash suppression effect is reduced
Solution Approach 1:
The splash guard is divided into a plate portion and a protruding portion that extends forward. This segmentation allows the splash guard to achieve effective splash suppression through its geometric configuration and spatial arrangement rather than relying solely on increased size or weight. The protruding portion specifically targets splash prevention at the front, while the plate portion provides additional coverage, enabling effective splash control with a lighter, more compact design.
Data Source
AI summary
An outboard motor includes a propeller shaft, a lower case, an upper case, and a splash guard. The lower case houses the propeller shaft. The upper case is located above the lower case. The splash guard includes an upper plate that projects forward from the upper case. The splash guard is separate from the upper case and is attached to the upper case.