Bicycle Dropout Socket Device for Wear Reduction
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Solution Overview
Problem
Existing bicycle wheel mounting systems face issues with wear and tear, increased weight, and complexity due to repeated installation and removal of wheels, leading to reduced service life and rigidity.
Innovation Solution
A bicycle component with a wheel mount featuring interchangeable bushing devices that provide a snug fit and internal thread, allowing for secure and efficient wheel attachment without unnecessary contact with other parts, enabling easy replacement of worn components and reducing assembly effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If knurled disks are used on the contact surface between dropout and fixed axle to increase clamping effect, then the connection firmness is improved, but the wear on dropout surfaces increases due to repeated installation and removal
Solution Approach 1:
The invention divides the wheel mounting system into separable components: the dropout (integrated into the fork) and the socket device (removable from the dropout). The socket device contains the bushing that contacts the axle, isolating the wear-prone contact surface from the permanent dropout structure. This segmentation allows the socket to be replaced when worn, while the dropout remains intact.
Solution Approach 2:
The bushing acts as an intermediary element between the dropout and the axle. It transfers the clamping force while protecting the dropout surface from direct contact and wear. The bushing is contained within the socket device, which can be independently replaced, thus protecting the permanent dropout structure.
2Duration of action of stationary object
If hat-shaped sockets with axial end plates are introduced in dropout slots to reduce wear, then the service life is extended, but the weight and number of parts increase
Solution Approach 1:
The invention combines the socket and bushing into a single integrated socket device that can be removed as one unit. This merging eliminates the need for separate hat-shaped sockets and axial end plates, reducing the total number of parts while achieving the same wear protection function.
Solution Approach 2:
The socket device serves multiple functions: it provides a bearing surface for the axle, protects the dropout from wear, and can be independently replaced when worn. This multi-functionality eliminates the need for additional specialized components like hat-shaped sockets and end plates.
3Duration of action of stationary object
If hardening or using more stable material is applied to stressed surfaces to reduce wear, then the wear resistance is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The bushing is designed as a consumable component with limited service life that can be easily replaced. Instead of manufacturing the permanent dropout with expensive hardened surfaces, the invention uses a simpler, softer bushing that absorbs wear and can be economically replaced when worn out.
Solution Approach 2:
The invention changes the material parameter strategy by using a softer, more wear-resistant bushing material in contact with the axle, rather than hardening the dropout. This allows the dropout to be manufactured from standard materials with simpler processes, while the bushing handles the wear through material selection.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The bicycle component (1) comprises an idler gear adapter (2) with two piping components (4,5), where an idler gear with a hub (3) is adjusted on the idler gear adapter. One piping component of a connector unit (10,11) is arranged on a receiving device (8,9) in an interchanged manner for receiving and supporting the hub. The connector unit of one receiving device has an adjusted seat on the inner periphery.