Suspension Fork Crown Rotational Stop for Over-Rotation Control
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Solution Overview
Problem
Suspension forks in bicycles experience over-rotation issues, leading to improper loading and instability due to impacts, cabling interference, and handlebar interference, particularly in aggressive environments.
Innovation Solution
A steerer device with a rotational stop integrated into the crown of the suspension fork to limit rotation, preventing adverse consequences by controlling extreme rotation events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the suspension fork is allowed to rotate freely, then the steering response is fast and agile, but over-rotation occurs causing improper loading and instability
Solution Approach 1:
The rotational stop mechanism provides dynamic rotation limitation, allowing the fork to rotate within a controlled range while preventing over-rotation. The stop mechanism engages only when the rotation angle exceeds the predetermined limit, maintaining free rotation during normal steering operations while ensuring stability during extreme conditions.
2Adaptability or versatility
If the suspension fork rotates beyond the limited range, then the steering flexibility is improved, but cabling interference and handlebar interference occur
Solution Approach 1:
The rotational stop mechanism prevents over-rotation before cabling or handlebar interference can occur. By establishing a physical rotation limit in advance, the system proactively prevents the harmful conditions that would arise from excessive rotation, rather than attempting to correct them after they occur.
3Adaptability or versatility
If the suspension fork rotates beyond the limited range, then the steering range is increased, but crown interference and improper loading occur
Solution Approach 1:
The rotational stop mechanism dynamically controls the steering range by engaging only when the predetermined rotation limit is reached. This allows the crown and other components to function freely within the normal operating range while preventing harmful interference during extreme rotation events.
Data Source
AI summary
A steerer device for a two-wheeled vehicle is provided. The steerer device may generally include a steerer adaptable for handlebar control and rotatable about a steering axis, at least one fork leg assembly, the at least one fork leg assembly including a wheel mounting interface, and a crown connecting the steerer and the at least one fork leg assembly. At least one rotational stop may be fixed on the crown, the at least one rotational stop sized and shaped to limit rotation of the crown about the steering axis.