Bicycle Freehub Adapter for Mixed Cogset Compatibility
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Solution Overview
Problem
Cyclists face the challenge of needing to replace the sprocket-carrying body to accommodate different types of cogsets, especially when switching between those with small, monolithic groups of sprockets and conventional sprockets, limiting flexibility and convenience.
Innovation Solution
A sprocket-carrying set that includes a short sprocket-carrying body and an adapter with axially extending grooves and teeth, allowing the adapter to extend the axial reach of the sprocket-carrying body, enabling the mounting of both cogsets with small, grouped sprockets and those with individual sprockets without requiring the sprocket-carrying body to be changed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a short sprocket-carrying body is used to accommodate cogsets with small monolithic groups of sprockets, then the axial extension is reduced, but the ability to mount conventional cogsets with individual sprockets is lost
Solution Approach 1:
The solution divides the sprocket-carrying system into two independent parts: a short sprocket-carrying body and a separate adapter. The adapter can be selectively attached to extend the axial reach when needed, allowing the system to adapt between short and long configurations without permanently changing the base structure.
Solution Approach 2:
The system transitions from a static, fixed-length sprocket-carrying body to a dynamic configuration where the axial extension can be changed on-demand by attaching or removing the adapter, enabling flexibility to match different cogset requirements.
2Adaptability or versatility
If different sprocket-carrying bodies are used to accommodate different cogset types, then compatibility is improved, but device complexity and number of replacement parts increase
Solution Approach 1:
The adapter serves multiple functions: it extends the axial reach of the short sprocket-carrying body, enables mounting of conventional cogsets, and can be selectively attached or removed. This single component replaces the need for multiple specialized sprocket-carrying bodies.
Solution Approach 2:
The adapter acts as an intermediary component between the short sprocket-carrying body and conventional cogsets. It provides the necessary axial extension and mounting interface without requiring modification of the base sprocket-carrying body or the cogset itself.
3Adaptability or versatility
If the sprocket-carrying body axial extension is increased to mount individual sprockets, then compatibility with conventional cogsets is improved, but the advantage of using compact monolithic groups is lost
Solution Approach 1:
The extension function is separated from the base sprocket-carrying body and placed in a detachable adapter. This allows the extension to be added only when needed for conventional cogsets, preserving the compact design for monolithic group cogsets.
Data Source
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AI summary
This adapter (50) is intended for a sprocket-carrying body (14) for a bicycle rear wheel. The adapter (50) comprises an annular body (51) adapted to abut at the sprocket-carrying body (14) as an extension thereof in an axially outer direction and to receive sprockets (20, 70) in a radially peripheral position; it also comprises a coupling element (52) formed on the annular body (51) to establish a shape coupling with the sprocket-carrying body (14) that makes the adapter rotate as a unit with the sprocket-carrying body (14), and at least one sprocket-receiving seat (56, 59) formed on the annular body (51) of the adapter and adapted for coupling with at least one sprocket (76, 77, 78), so as to make the adapter rotate as a unit with the sprocket (76, 77, 78). The adapter (50) can be coupled with a short sprocket-carrying body (14), of the type suitable for cogsets (20) in which the smallest sprockets are grouped in a monolithic group (26); once coupled with the sprocket-carrying body (14), it extends the axial extension thereof, thus making it possible to receive cogsets (70) in which the smallest sprockets (76, 77, 78) are separated and can be mounted singularly on the sprocket-carrying set (60) formed by the assembly of the sprocket-carrying body (14) and the adapter (50).