Motorcycle Neck Adapter for Larger Wheel Installation
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Solution Overview
Problem
Existing motorcycle frames are designed to accommodate standard front wheel diameters and lack a suitable replacement neck assembly to accommodate larger wheels without altering the operating height or rake of the motorcycle.
Innovation Solution
A replacement neck assembly for motorcycle frames, specifically designed for Harley-Davidson models, that allows for the installation of 26-inch or 30-inch front wheels by modifying the frame to maintain the original height and rake, including an optional fairing mount and a modified triple tree, ensuring compatibility with factory or modified triple trees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standard motorcycle frame is used, then the frame accepts a factory front wheel of a certain diameter, but the frame cannot accommodate a larger front wheel without altering the operating height or rake
Solution Approach 1:
The invention divides the frame modification into separate modular components: a neck adapter that interfaces with the existing frame, a triple tree adapter that connects to the forks, and optional fairing mounts. This segmentation allows the wheel diameter upgrade without requiring complex overall frame redesign, as each component can be independently designed and installed.
Solution Approach 2:
The neck adapter serves as an intermediary component between the original frame and the larger wheel assembly. It provides the necessary interface and adaptation, allowing the standard frame to accommodate non-standard wheel sizes without direct modification to the frame itself, thereby reducing modification complexity.
2Adaptability or versatility
If the frame is modified to accept a larger front wheel, then wheel diameter compatibility is improved, but the operating height and rake of the motorcycle are altered
Solution Approach 1:
The neck adapter and triple tree adapter are designed with specific geometric parameters that compensate for the larger wheel size. By carefully controlling the adapter dimensions, the system maintains the original rake angle and height parameters, ensuring riding dynamics consistency while accommodating the larger wheel.
Solution Approach 2:
The adapters are designed to maintain the original frame geometry and riding characteristics at the critical interfaces. The neck adapter preserves the frame's original height and rake parameters, creating an equipotential condition where the larger wheel does not disrupt the original riding dynamics.
3Reliability
If a replacement neck assembly is designed to maintain original height and rake, then riding dynamics consistency is improved, but the device complexity increases
Solution Approach 1:
The invention combines multiple functions into integrated adapter assemblies: the neck adapter incorporates mounting features for both the frame and the triple tree adapter, while the triple tree adapter itself integrates the fork mounting and wheel alignment functions. This merging reduces the number of separate components needed, thereby reducing overall device complexity despite the specialized design requirements.
Data Source
AI summary
A replacement neck assembly for a motorcycle modifies the motorcycle frame to accept a larger front wheel diameter than the factory original, the replacement neck assembly providing the replacement neck, an optional fairing mount, the replacement neck accepting a factory or modified triple tree, whereby the motorcycle frame can accept the large front wheel without affecting the operating height of the motorcycle.