Segmented Derailleur Mount Abutment for Bicycle Frame
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Solution Overview
Problem
The existing mounting device for a derailleur of a rear gearshift on a bicycle frame lacks structural strength and is cumbersome for manual assembly and disassembly, making maintenance difficult.
Innovation Solution
A new abutment element comprising two connected annular sector components provides enhanced structural support and ease of assembly/disassembly, featuring shaped attachment portions for secure fastening and even load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an elastic stop ring is used as the abutment element, then the mounting device can be assembled, but the structural strength is insufficient and manual assembly/disassembly is cumbersome
Solution Approach 1:
The abutment element is divided into two separate components: a first component with an annular seat and a second component that fits within it. This segmentation allows each component to be optimized for specific functions - the first component provides structural strength while the second component enables easy manual assembly and disassembly through its ability to be inserted and removed from the annular seat
2Strength
If the abutment element is made as a single piece, then structural strength is improved, but assembly and disassembly become difficult
Solution Approach 1:
By dividing the abutment element into two components, the invention achieves both structural strength (through the first component's annular seat) and ease of repair (through the ability to easily remove and replace the second component). The segmented design allows the second component to be disassembled and reassembled manually without requiring special tools or complex procedures
Solution Approach 2:
The design allows the second component to be easily removed and replaced when worn or damaged, while the first component (annular seat) remains in place. This enables selective replacement of only the necessary component, reducing maintenance costs and complexity while maintaining structural integrity
Data Source
AI summary
A device for mounting a derailleur of a rear gearshift on a bicycle frame is provided. The device includes a pin suitable for being fixed in a corresponding seat of said bicycle frame, an annular seat formed on said pin, a support body of said derailleur, a through hole formed in said support body and crossed by said pin, an abutment element associated with said pin in said annular seat, wherein said abutment element provides a support in the axial direction on said pin. Said abutment element comprises a first and a second component, which are shaped like an annular sector and that can be connected together through respective shaped attachment portions.