Adjustable Bicycle Headset Assembly for Tool-Light Head Angle Tuning
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Solution Overview
Problem
Existing bicycles lack an efficient and user-friendly mechanism for adjusting the head angle, which significantly affects handling characteristics based on riding conditions, and existing solutions often require specialized tools and disassembly for adjustments.
Innovation Solution
An adjustable headset assembly with upper and lower cups that interface with the head tube using complementary curved surfaces, allowing for tool-free or minimal-tool adjustments of the head angle by rotating or replacing the upper cup, without disassembling the fork from the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional head angle adjustment methods are used, then the bicycle geometry can be modified to suit different riding conditions, but the adjustment process requires specialized tools and disassembly procedures that are complex and time-consuming
Solution Approach 1:
The headset assembly is divided into separate components: a first headset component with a bearing and a second headset component with a cup. This segmentation allows the cup to be independently adjusted or replaced without disassembling the entire headset or fork from the frame, enabling tool-free or minimal-tool head angle adjustments while maintaining structural integrity.
2Adaptability or versatility
If traditional headset assemblies are used, then the steering axis is fixed relative to the head tube, but this prevents field adjustment of head angle without disassembly
Solution Approach 1:
The headset assembly transitions from a fixed configuration to a dynamic, adjustable system. The cup component can be rotated or replaced to change the head angle, allowing the steering axis orientation to be dynamically adjusted in the field without requiring disassembly of the fork from the frame, thus reducing device complexity while maintaining adjustability.
3Adaptability or versatility
If head angle adjustment requires disassembly of the fork from the frame, then geometry changes can be made, but this increases adjustment time and hardware complexity
Solution Approach 1:
The adjustable cup component is pre-configured with bearing surfaces that allow direct adjustment of the head angle without requiring preliminary disassembly steps. The cup can be independently removed, rotated, or replaced to change geometry, eliminating time-consuming disassembly procedures while maintaining full geometry modification capability.
Data Source
Figure 1
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Figure 3A
AI summary
An adjustable head angle (694) bicycle (10) assembly includes a steerer tube (250); a head tube (15, 215, 415, 515) that includes a first annular surface protruding radially inward from an inner wall (380) at the upper end, and a second annular surface protruding radially inward from the inner wall (380) at the lower end; an upper cup (256, 456, 556, 656) that includes a third annular surface engaged with the first annular surface of the head tube (15, 215, 415, 515); and a lower cup (258, 558) that includes a fourth annular surface engaged with the second annular surface of the head tube (15, 215, 415, 515).