Adjustable Handlebar Assembly Axial Pivot Ergonomics
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Solution Overview
Problem
Existing handlebars for straddle-type vehicles offer limited ergonomic adjustments, primarily providing only one degree of freedom, which can lead to uncomfortable riding positions and inoperable controls for drivers, especially during longer trips, and compromise structural rigidity.
Innovation Solution
An adjustable handlebar assembly with axial and radial adjustments, featuring a hand grip assembly with an elongated hollow member and an elongated member that allows for axial movement and pivotal orientation changes, secured by releasable fasteners, enabling multiple predetermined positions and orientations to enhance ergonomics and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the handlebar is pivoted about the clamp bar axis to adjust position, then the hand grip position can be adjusted vertically and forwardly/rearwardly, but the lateral separation of the hand grips cannot be adjusted and the orientation of the hand grips changes resulting in poor ergonomics
Solution Approach 1:
The handlebar is divided into multiple independent adjustment components: a clamp bar for mounting, a riser for vertical height adjustment, and the handlebar itself for angular orientation adjustment. This segmentation allows each component to be adjusted independently without affecting the others, enabling precise ergonomic positioning while maintaining lateral separation of hand grips.
Solution Approach 2:
The handlebar assembly incorporates multiple degrees of freedom through adjustable components that can be positioned dynamically. The riser allows vertical adjustment, the handlebar allows angular adjustment, and both can be locked at various positions using quick-release mechanisms, providing dynamic adaptability to different rider preferences and conditions.
2Adaptability or versatility
If additional degrees of freedom are provided in adjusting the handlebar such as an adjustable height riser, then ergonomic improvements are possible, but the structural rigidity of the steering assembly may be compromised
Solution Approach 1:
The steering assembly is segmented into rigid mounting components (clamp bar, riser, handlebar) connected through adjustable interfaces. This segmentation allows the structure to maintain rigidity where needed while providing adjustment capability at the interfaces, resolving the conflict between strength and adaptability.
Solution Approach 2:
The adjustable components use parameter changes (vertical position of the riser, angular orientation of the handlebar) to achieve ergonomic variations without changing the fundamental rigid structure of the assembly. The quick-release mechanisms allow these parameter changes while maintaining structural integrity when locked in position.
3Adaptability or versatility
If the handlebar is adjusted by pivoting about the clamp bar axis, then the position can be changed for different rider heights, but the orientation of the hand grips changes making controls inconvenient or inoperable
Solution Approach 1:
The adjustment functionality is segmented into independent operations: vertical positioning via the riser and angular orientation via the handlebar. This allows the rider to adjust only the necessary parameter (vertical height or angle) without unintended changes to the other, ensuring controls remain in the optimal position for operation.
Solution Approach 2:
The handlebar assembly provides dynamic adjustment capability where the riser can be positioned at various vertical heights and the handlebar can be oriented at various angles, with each adjustment independently controllable through quick-release mechanisms. This dynamic flexibility ensures controls remain accessible and ergonomic across different riding conditions.
Data Source
AI summary
Each side of an adjustable handlebar assembly has a hand grip assembly receiving portion having one of an elongated hollow member and an elongated member, a hand grip assembly and at least one releasable fastener. The hand grip assembly has the other of the elongated hollow member and the elongated member, and a hand grip disposed on the other of the elongated hollow member and the elongated member. The at least one releasable fastener is disposed on one of the elongated hollow member and the elongated member. The elongated member is received coaxially in the elongated hollow member. The hand grip is axially movable and pivotable relative to the hand grip assembly receiving portion. The at least one releasable fastener is operative to selectively and releasably fix the elongated member relative to the elongated hollow member.