Front Fork Suspension Link Layout for Motorcycle Handlebar
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Solution Overview
Problem
Existing front wheel suspension devices for saddle-ride type vehicles have low flexibility in handlebar layout, making it difficult to achieve a compact and low height design, which limits the flexibility of the riding posture and increases the visibility of components like the shock absorber.
Innovation Solution
A front wheel suspension device with a link member composed of upper and lower links that integrate the handlebar with the steering member, allowing the handlebar grip portion to be positioned between the links, and a shock absorber member with a central axis offset rearward, reducing the height and increasing layout flexibility while suppressing protrusion and ensuring component compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the handlebar grip portion is disposed above the link member in a side view, then the handlebar layout is simple, but the layout flexibility is low and the handlebar height is increased
Solution Approach 1:
The patent positions the handlebar grip portion in the vertical dimension between the upper and lower links rather than above the link member, utilizing the space between components to achieve compact layout while maintaining flexibility
2Length of moving object
If the link member is designed with L-shape protruding forward and upwardly, then the connection between handlebar and front fork is achieved, but the handlebar layout flexibility is reduced and compactness is compromised
Solution Approach 1:
The link member is segmented into upper link and lower link that can rock relative to each other, allowing independent positioning and achieving compact layout while maintaining connection functionality
Solution Approach 2:
The handlebar grip portion is positioned in the vertical space between the upper and lower links, utilizing the interstitial dimension to achieve compact overall layout
3Ease of manufacture
If the shock absorber member is positioned with central axis aligned with the upper arm, then the suspension function is achieved, but the shock absorber is visible and appearance quality is reduced
Solution Approach 1:
The body frame serves as an intermediary that covers the upper end of the shock absorber member, concealing it from view while maintaining its suspension function
Solution Approach 2:
The shock absorber central axis is positioned rearward in the longitudinal dimension, placing it behind the upper arm to achieve both functional and aesthetic goals
Data Source
AI summary
The front wheel suspension device for a saddle-ride type vehicle, includes a front fork having a lower end supporting a front wheel; a steering member rotatably supported by a body frame, and rotated about a rotational axis in accordance with operation of a handlebar; and a link member composed of an upper link and a lower link. The upper link of the link member has one end rockably connected to the steering member. The lower link has an upper portion rockably connected to the other end of the upper link and a lower portion rockably connected to an upper end of the front fork. A handlebar grip portion is formed at both ends of the handlebar in a vehicle width direction with the handlebar grip portion being disposed between the upper link and the lower link in a side view.