Motorcycle Frame Engine Mounting Integration
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Solution Overview
Problem
There is a demand for further weight reduction of motorcycle frames while maintaining the necessary stiffness and strength to support the power engine, as existing designs often require additional supports that increase weight.
Innovation Solution
A motorcycle frame design featuring a head pipe with pair of front main frames that extend toward the power engine and include power-engine fixing parts fixed at overlapping positions, eliminating the need for separate brackets and allowing for a lighter structure by using rear main frames with lower stiffness for supporting other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If separate brackets or supports are added to extend toward the power engine to ensure sufficient stiffness and strength, then the structural strength is improved, but the weight of the motorcycle frame increases
Solution Approach 1:
The front main frame is designed to directly extend toward the power engine and integrate the power-engine fixing parts as an inherent component rather than a separate bracket. This merging of functions into a single structural element eliminates the need for additional supports while maintaining the required strength and stiffness for engine mounting.
Solution Approach 2:
The front main frame serves multiple functions: it provides structural support, positions the power engine, and includes integrated fixing parts for engine attachment. This multi-functionality reduces the overall frame weight by eliminating the need for separate dedicated supports for each function.
2Weight of stationary object
If the front main frames are extended toward the power engine with integrated fixing parts, then the frame structure is simplified and weight is reduced, but the manufacturing complexity may increase
Solution Approach 1:
The frame is divided into distinct functional segments: the front main frame extending toward the engine, the power-engine fixing parts integrated at the appropriate position, and the rear main frames extending rearward. This segmentation allows each component to be optimized and manufactured separately before assembly, reducing overall manufacturing complexity despite the integrated design.
Data Source
AI summary
A motorcycle frame includes a head pipe, a pair of front main frames, and a pair of rear main frames. The pair of front main frames separates in a vehicle width direction from the head pipe, extends toward a power engine that is located on a rear side of the head pipe, and includes power-engine fixing parts that are fixed to the power engine at positions that overlap with the power engine as viewed in the vehicle width direction. The pair of rear main frames extends rearward from the power-engine fixing parts of the pair of front main frames.