Bicycle Brake Disk Fixing Ring With Tool-Free Anti-Detachment Lock
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Solution Overview
Problem
Existing bicycle brake disk attachment systems require complex components or tools, and are prone to inadvertent detachment, posing safety risks.
Innovation Solution
A wheel component with a fixing ring and securing unit that uses a fixing unit with radial and axial through holes and a securing arm to create a safety lock, allowing secure attachment to a bicycle hub without specialized tools, using a fixing ring with a tubular unit and threadable engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a setscrew is used to secure the fixing ring, then anti-twist protection is provided, but additional special tools are required and the setscrew may detach unnoticed
Solution Approach 1:
The patent extracts the securing function from the complex setscrew mechanism and implements it through a simple tab element that engages with a corresponding recess in the brake disk adapter. This tab is integrated into the fixing ring structure itself, eliminating the need for separate setscrews and special tools while maintaining anti-twist protection.
Solution Approach 2:
The fixing ring design incorporates the securing mechanism directly into its structure through the tab element. The tab automatically engages with the brake disk adapter recess during installation, providing self-securing functionality without requiring additional components or specialized tools for operation.
2Ease of manufacture
If click-in elements are used to attach the brake disk to the adapter, then axial connection is established, but the elements may break off eliminating securing
Solution Approach 1:
The patent merges the axial securing function and anti-twist protection into a single integrated tab element on the fixing ring. This tab simultaneously provides axial positioning and rotational restraint through engagement with the brake disk adapter, eliminating the need for separate click-in elements and reducing component failure points.
Solution Approach 2:
The fixing ring design incorporates built-in rotational restraint through the tab element engagement with the brake disk adapter recess. This prevents excessive rotational forces from being applied to the axial connection elements during installation or operation, providing protective cushioning against potential breakage before it can occur.
3Reliability
If a serrated disk with elastic deformation is used, then frictional contact provides securing, but increased expenditure due to different components is required
Solution Approach 1:
The patent extracts the frictional contact securing function from the complex serrated disk mechanism and replaces it with a simple tab element that provides direct mechanical engagement. This eliminates the need for serrated surfaces and elastic deformation mechanisms while achieving reliable securing with fewer components.
Solution Approach 2:
Instead of using frictional contact through serrated surfaces that require elastic deformation, the patent inverts the approach by using direct positive mechanical engagement through the tab and recess interface. This provides equally reliable securing through geometric constraint rather than friction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides a secure, tool-free safety lock for the fixing ring, preventing inadvertent detachment and reducing the risk of component loss, while being adaptable to various brake disk designs and thicknesses.
Implementation Method 1
a tube unit extending in an axial direction and having a thread formed thereon, for screwing the thread of the tube unit to a thread in or on the hub shell
Data Source
AI summary
A wheel component with a fixing ring for attaching a brake disk to a hub shell of a bicycle hub, and with a securing unit for securing the fixing ring, wherein the ring includes a radially-extending fixing unit, and a threaded axially-extending tube unit, to screw the thread of the threaded tube unit on the hub shell, and to attach the brake disk to a hub. The fixing unit includes at least one axial through hole which is configured such that the through hole is at least in partial axial alignment with an axial cavity in the brake disk in the mounted state of the fixing ring, so that the securing arm of the securing unit is insertable into the cavity of the brake disk through the through hole in the fixing unit, so that the securing arm locks the fixing ring to prevent inadvertent detachment of the fixing ring.