Motorcycle Steering Pin Inclination Adjustment Mechanism
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Solution Overview
Problem
Existing solutions for adjusting the steering angle of a motorcycle are laborious, imprecise, and often require the replacement of multiple components, leading to increased weight, complexity, and reliability issues, while offering limited adjustment sensitivity and versatility.
Innovation Solution
A device that allows continuous variation of the inclination of the steering axis by using an auxiliary axis to rotate the steering pin relative to the steering tube, enabling adjustments without removing components from the steering tube, with a system of containment means and locking mechanisms to facilitate precise adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If eccentric bushings are used to adjust the steering angle, then the steering angle can be modified, but the adjustment operation becomes laborious and time-consuming requiring partial dismantling of the steering group
Solution Approach 1:
The device transforms the static steering group into a dynamic system where the steering pin can be rotated relative to the steering tube during adjustment. The containment means allows the steering pin to be tilted and rotated to different angular positions, enabling continuous adjustment of the steering angle without dismantling components.
Solution Approach 2:
The steering group is segmented into independently adjustable components: the steering pin, containment means, and locking means. This segmentation allows the steering pin to be adjusted independently within the containment means without requiring removal of other steering group components, reducing adjustment time and complexity.
2Adaptability or versatility
If the entire steering group is replaced to change the steering angle, then the correct angle can be achieved, but the complexity and cost of the operation increases significantly
Solution Approach 1:
Instead of replacing the entire steering group, the invention makes the existing steering pin dynamically adjustable within the steering tube. The containment means provides a mechanism for the steering pin to be tilted and rotated to different angular positions, achieving angle variation without component replacement.
Solution Approach 2:
The invention extracts only the essential adjustment function from a complete steering group replacement. By isolating the steering pin and providing a containment means for its angular adjustment, the solution achieves the desired angle variation without the complexity of replacing entire steering components.
3Loss of time
If a hinged steering tube is used to allow quick adjustment, then adjustment speed improves, but the weight and reliability problems arise due to excessive components
Solution Approach 1:
The adjustment function is segmented into a compact system with the steering pin, containment means, and locking means. This segmented approach achieves quick adjustment without the excessive weight of a completely hinged steering tube, as only the necessary components for angular adjustment are included.
Solution Approach 2:
The steering pin is made dynamically adjustable within the steering tube through the containment means, allowing quick angular changes. The locking means secures the position once adjusted, providing both speed and reliability without excessive components.
4Adaptability or versatility
If traditional adjustment methods are used, then the steering angle can be changed, but the precision and sensitivity of adjustment are limited
Solution Approach 1:
The steering pin can be continuously tilted and rotated within the containment means to achieve any angular position within the desired range. This continuous adjustment capability provides high precision and sensitivity, allowing fine-tuning of the steering angle that discrete adjustment methods cannot achieve.
Solution Approach 2:
The adjustment mechanism operates in multiple dimensions: the steering pin can be tilted along one axis and rotated around another axis within the containment means. This multi-dimensional adjustment capability expands the range of achievable angles while maintaining high precision through continuous positional control.
Data Source
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AI summary
A classic steering group in a motorcycle or similar includes a steering pin which can rotate freely inside a steering tube integral with a frame. This pin is generally connected to a handlebar where the main controls available for the pilot are housed and, through an upper plate or steering head and a lower plate or steering base, to a suspension system to which the front wheel and the braking system are associated. The device object of the present invention relates to an improved steering group which allows to continuously vary the inclination of the steering pin axis. This device is made so as to include, in addition to the components just described, some containment means of the steering pin which, in the adjustment phase only, can move inside the steering tube so as to continuously assume infinite working positions, corresponding to as many inclinations of the axis of the steering pin. The adjustment is obtained through a succession of single rotations or combinations of rotations of these bodies, around axes such that, when each individual rotation or their combination is carried out, they are not parallel with respect to the axis of the steering pin. Moreover, locking systems of the containment bodies just mentioned in the desired work positions and of the measurement systems of the carried out rotations are provided.