Bicycle Hub Locking Mechanism for Rapid Wheel Changes
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Solution Overview
Problem
Current bicycle wheel hub systems require time-consuming and labor-intensive processes for changing wheels, especially during competitive events, due to the need for careful disengagement and re-engagement of drive and brake components, and are not compatible with different brands, leading to increased costs and potential damage.
Innovation Solution
A bicycle hub system with a locking mechanism featuring matching coupling faces on rear and front hub assemblies, allowing wheels to be easily coupled or decoupled without disengaging drive and brake components, enabling quick wheel changes and compatibility with standard components across brands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional attachment systems are used where drive and brake components are attached to the hub, then the wheel can be securely attached to the frame, but the wheel change process becomes time-consuming and labor-intensive due to the need for careful disengagement and re-engagement of components
Solution Approach 1:
The system divides the wheel assembly into two independent parts: the wheel hub (with rim, tire, and spokes) and the drive/brake components (which remain attached to the frame). The locking mechanism allows the hub to be detached from the frame without affecting the drive components, enabling rapid wheel changes while maintaining secure attachment during normal operation.
Solution Approach 2:
The locking mechanism extracts the wheel hub from the frame by removing it from between the locking arms, while the drive and brake components remain extracted/attached to the frame. This separation allows the wheel to be changed independently without disturbing the drive components, significantly reducing wheel change time.
2Reliability
If drive and brake components are attached to the hub, then the wheel assembly is complete and functional, but storage becomes difficult due to damage prevention methods and bulk occupied by attached components
Solution Approach 1:
The system segments the wheel assembly so that the hub can be stored separately from the drive and brake components. The hub stores in a compact form without attached components, reducing storage volume and minimizing damage risk during storage and transport.
3Adaptability or versatility
If different hub widths and axle sizes are used for front and rear wheels, then each wheel can be optimized for its specific function, but interchangeability between wheels is lost requiring both wheels to be kept as spares
Solution Approach 1:
The locking mechanism is designed with universal compatibility to accommodate different hub widths and axle sizes. The locking arms can adjust to fit various wheel configurations, allowing a single spare wheel to serve multiple positions (front or rear) and reducing the need to maintain multiple specialized spare wheels.
4Reliability
If careful lining up and placement of drive components is required during wheel insertion, then proper function and damage prevention are ensured, but the wheel change process becomes more complex and time-consuming
Solution Approach 1:
The locking mechanism incorporates self-aligning features that automatically guide the hub into the correct position between the locking arms. The splined interface and geometric constraints provide self-alignment during insertion, eliminating the need for manual lining up while ensuring proper function and preventing damage.
Data Source
AI summary
A bicycle hub system, method and device including rear and front hub assemblies. Both the rear and front hub assemblies include locking mechanisms with matching undulating splined coupling faces that correspond to complementary undulating splined coupling faces of a wheel hub.