Bicycle Fork Air Spring Venting for Safe Disassembly
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Solution Overview
Problem
Existing air springs for bicycle components face issues during disassembly, as they can eject parts at high velocity due to improper depressurization, causing damage and safety hazards.
Innovation Solution
Incorporation of retaining elements and automatic depressurization mechanisms in air springs to prevent ejection of parts during disassembly, ensuring safe and efficient disassembly by venting pressure when the cap and sealhead are decoupled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cap and sealhead are decoupled during disassembly, then the sealed pressure chamber can be accessed for maintenance, but pressurized parts are ejected at high velocity causing damage and safety hazards
Solution Approach 1:
The patent applies preliminary action by automatically depressurizing the sealed pressure chamber before the cap and sealhead are fully decoupled. The vent groove is positioned to activate during the decoupling process, venting pressurized air before parts can be ejected, thus preventing the harmful effect while maintaining ease of disassembly
Solution Approach 2:
The vent groove acts as an intermediary mechanism that mediates between the sealed pressure chamber and the external environment. It provides a controlled path for pressurized air to escape during disassembly, preventing uncontrolled ejection of parts while allowing maintenance access
2Reliability
If retaining elements are added to block sealhead ejection, then part ejection is prevented, but device complexity increases
Solution Approach 1:
The cap serves multiple functions: it seals the pressure chamber during operation and acts as a retaining element during disassembly. The vent groove in the cap provides both depressurization functionality and structural support, reducing the need for separate retaining elements and simplifying the overall device
Solution Approach 2:
The patent merges the depressurization function and the retaining function into the cap structure. The vent groove and cap body work together as an integrated system to prevent part ejection while enabling maintenance access, eliminating the need for separate retaining mechanisms
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
Prevents parts from being ejected during disassembly, reducing the risk of damage and ensuring safer maintenance by automatically depressurizing the sealed pressure chamber.
Implementation Method 1
a vent groove that extends in an axial direction through the external threads... enables pressurized air to escape through the vent groove
Implementation Method 2
a seal coupled to the cap and in sealing contact with an inner surface of the tube
Data Source
AI summary
Example air springs for bicycle front forks and other bicycles components are described herein. An example air spring includes a tube having a first end and a second end, a cap coupled to the tube at or near the first end, a sealhead in the tube near the second end such, a spacer in the tube, the spacer disposed between the sealhead and the second end, a first retaining element coupled to an inner surface of the tube and engaged by an end of the spacer to prevent the spacer from moving axially out of the second end of the tube, and a second retaining element coupled to the inner surface of the tube. The second retaining element is spaced further from the second end than the first retaining element. The second retaining element has an inner diameter that is less than an outer-most diameter of the sealhead.