Motorcycle Side Mirror Vibration Suppression via Segmented Stay
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Solution Overview
Problem
Conventional side mirrors for straddle vehicles, with single rod-shaped mirror stays, are prone to vibration, making it difficult for riders to see due to the instability.
Innovation Solution
The side mirror design incorporates a mirror stay with a first and second stay portion branching from the base end to the tip end, increasing strength and reducing vibration by forming a coupled structure that allows air to flow through, thereby reducing air resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single rod-shaped mirror stay is used, then the device complexity is reduced and manufacturing is easier, but the strength decreases and vibration increases
Solution Approach 1:
The mirror stay is divided into multiple rod-shaped stays (first, second, third, and fourth stays) that extend in different directions from the base end portion. This segmentation distributes the structural load and reduces vibration while maintaining overall strength, resolving the contradiction between simple structure and structural strength.
2Ease of manufacture
If a single rod-shaped mirror stay is used, then the manufacturing process is simpler, but the vibration suppression capability is reduced
Solution Approach 1:
The mirror stay system uses multiple rod-shaped stays extending in different directions, which can be manufactured using standard processes while providing superior vibration suppression. The segmented structure maintains manufacturing simplicity while significantly improving stability.
3Strength
If multiple rod-shaped stays are used to increase strength, then the vibration is suppressed, but the device complexity increases
Solution Approach 1:
The mirror stay is segmented into multiple rod-shaped elements (first, second, third, and fourth stays) that extend in different directions from a common base end portion. This segmentation provides enhanced strength and vibration suppression while maintaining relative structural simplicity through the use of identical rod-shaped components.
4Stability of the object's composition
If multiple rod-shaped stays are used to suppress vibration, then the mirror visibility is improved, but the manufacturing complexity increases
Solution Approach 1:
The mirror stay system uses multiple rod-shaped stays that can be manufactured using conventional processes. The segmented design provides superior vibration stability and mirror visibility while the modular rod-shaped components keep manufacturing complexity manageable.
Data Source
AI summary
A side mirror for a straddle vehicle includes: a mirror stay including a base end portion attached to a vehicle body of a motorcycle (straddle vehicle); and a mirror portion including a mirror and provided at a tip end portion of the mirror stay. The mirror stay includes a first stay portion and a second stay portion which branch from the base end portion to extend toward the tip end portion.