Handlebar Holder Structure With Tunable Rigidity for Road Shock Damping
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Solution Overview
Problem
Existing handlebar assemblies in straddled vehicles face challenges in maintaining appropriate rigidity due to varying forces acting on the handle holder, which can lead to displacement and reduced operational stability.
Innovation Solution
The handlebar assembly features a handle holder with adjustable flexural rigidity, comprising left and right handlebar supporting sections connected via connecting arm sections of adjustable length, allowing for displacement in up-down and lateral directions, and optionally incorporating elastic members to enhance rigidity adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the handle holder is made with high rigidity (e.g., metal), then strength and stability are improved, but the ability to absorb road shocks and adjust to varying forces deteriorates
Solution Approach 1:
The patent makes the handle holder dynamically adjustable by allowing changing its flexural rigidity according to operating conditions. The handle holder can be adjusted to have higher rigidity when high stability is needed and lower rigidity when road shock absorption is needed, transitioning from a static to a dynamic structure.
Solution Approach 2:
The patent changes the physical parameter of flexural rigidity of the handle holder. By adjusting the flexural rigidity parameter, the handle holder can adapt to different operating conditions, either absorbing road shocks effectively or providing high stability as needed.
2Ease of manufacture
If the handle holder uses fixed rigidity design, then manufacturing simplicity is maintained, but design freedom and adaptability to different operating conditions deteriorate
Solution Approach 1:
The patent introduces adjustability to the handle holder, transforming it from a fixed rigidity component to one with variable flexural rigidity. This allows the same component to adapt to different operating conditions while maintaining a relatively simple manufacturing process through standardized adjustment mechanisms.
3Ease of manufacture
If the connecting arm section is made short and thick, then manufacturing simplicity and high rigidity are achieved, but the flexural rigidity adjustability and operability deteriorate
Solution Approach 1:
The patent changes the parameters of the connecting arm section, specifically making the member length greater than the sum of width and thickness. This dimensional change enables the connecting arm to provide appropriate flexural rigidity that balances manufacturing simplicity with improved handlebar operability.
4Stability of the object's composition
If the handle holder is made rigid and fixed, then stability under varying forces is improved, but operability and ease of operation deteriorate
Solution Approach 1:
The patent resolves the contradiction between stability and operability by making the handle holder's flexural rigidity dynamically adjustable. The handle holder can be set to higher rigidity for stability when needed and lower rigidity for ease of operation when needed, allowing both requirements to be met at different times.
Data Source
AI summary
A handlebar assembly including: an upper bracket rotatable with a steering shaft; a handlebar extending in a left-right direction; a handle holder supporting the handlebar and including: a pair of handlebar supporting sections positioned respectively on left and right sides of the steering shaft, a main body positioned away from the handlebar supporting sections in an up-down direction view, and a pair of connecting arm sections connecting the handlebar supporting sections to the main body; a pair of supporting connecting sections connecting the handlebar supporting sections to the upper bracket, where the handle holder is displaceable in the up-down and/or lateral direction; and a body connecting section connecting the main body to the upper bracket. A distance between each of the supporting connecting sections and the body connecting section, in the up-down direction view, is greater than a sum of a width and a thickness of each connecting arm section.