Divided Magnesium Seat Frame for Saddle Vehicles
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Solution Overview
Problem
The existing seat frame molding methods for saddle riding vehicles are restricted by the need for sufficient strength and rigidity, limiting design flexibility and increasing mold size due to integrally casted structures.
Innovation Solution
A seat frame structure for saddle riding vehicles made of magnesium alloy, divided into right and left parts with cross members that couple each other, allowing for independent molding and reinforcement, reducing mold size and enhancing strength and rigidity through fastening and rib placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the seat frame is made as an integrally casted structure, then strength and rigidity are ensured, but the mold size increases and molding method becomes restricted
Solution Approach 1:
The seat frame is divided into right and left divided portions that are casted separately using smaller molds, then coupled together with cross members. This segmentation allows downsizing of individual molds while maintaining the overall structural integrity through the coupling mechanism of cross members with fastening members.
2Volume of stationary object
If the seat frame is divided into right and left parts, then mold size is reduced, but strength and rigidity may be compromised
Solution Approach 1:
The right and left divided portions are merged together through cross members that are fastened to both portions using fastening members. This combining approach restores and maintains the strength and rigidity of the overall seat frame structure despite the division into separate casted parts.
Solution Approach 2:
Cross members are introduced in the width direction to couple the right and left divided portions, adding a dimensional element that reinforces the structure. The cross members create a three-dimensional coupling system that enhances rigidity across the divided portions.
3Strength
If cross members are added to couple divided portions, then strength and rigidity are enhanced, but device complexity increases
Solution Approach 1:
The cross members serve multiple functions: they couple the right and left divided portions together, provide mounting positions for fastening members, and enhance the rigidity of the seat frame. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
Data Source
AI summary
A seat frame extends rearward from a main frame, and the seat frame is a casting divided into right and left two parts, and the seat frame includes an upper cross member and a lower cross member, and the upper cross member and lower cross member couple divided left and right left side frame half body and right side frame half body one another, and the upper cross member and lower cross member are each fastened to the left side frame half body and right side frame half body with fastening members, and a seat is located above the one upper cross member, left side frame half body, and right side frame half body, and the lower cross member faces the upper cross member.