Adjustable Axle Retaining Sleeve for Fork Geometry Stability
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Solution Overview
Problem
Existing axle retaining systems in vehicles face challenges in maintaining proper geometry and alignment between the fork and wheel hub, leading to deformation and increased friction when accommodating different wheel hub sizes, which affects performance and longevity.
Innovation Solution
An adjustable axle retaining structure that uses a sleeve or geometrically shaped component to establish and maintain acceptable geometry between the wheel and fork tubes, allowing for initial width compensation without requiring additional adjustments during wheel removal or reinstallation, and preventing fork deformation through a tool-free or tool-style quick release configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing axle retaining systems are used to accommodate different wheel hub sizes, then the system must be adjusted for each hub size, but this causes fork deformation and increased friction
Solution Approach 1:
The axle retaining system is segmented into a fixed fork body and a movable sleeve component. The sleeve can be independently adjusted along the axle to accommodate different hub sizes without moving the entire fork assembly, thereby maintaining fork geometry stability while providing adaptability.
Solution Approach 2:
A sleeve acts as an intermediary component between the axle and the wheel hub. This sleeve can be adjusted to different positions to accommodate various hub sizes, while the fork itself remains fixed and undeformed. The sleeve mediates the adaptation requirement without transmitting deformation to the fork.
2Manufacturing precision
If the axle retaining structure is adjusted for each wheel removal and reinstallation, then proper alignment can be maintained, but this requires repeated adjustments and increases operation time
Solution Approach 1:
The sleeve is pre-adjusted to the correct position during initial hub installation. Once positioned, the sleeve is locked in place using a locking mechanism (such as a set screw or clip). This preliminary adjustment and locking eliminates the need for repeated adjustments during subsequent wheel removal and reinstallation operations.
Solution Approach 2:
The locking mechanism enables the sleeve position to be self-maintaining. After the initial adjustment, the locked sleeve automatically maintains the correct alignment without requiring active intervention or adjustment during routine wheel removal and reinstallation, making the system self-servicing.
3Ease of operation
If a tool-free quick release configuration is used, then ease of operation is improved, but the mechanism for maintaining geometry must be simplified
Solution Approach 1:
The adjustment and locking functions are merged into a single integrated sleeve mechanism. The sleeve simultaneously provides the adjustment capability for different hub sizes and the locking capability to maintain geometry, all operable through a single tool-free quick release action. This merging eliminates the need for separate complex mechanisms.
Solution Approach 2:
The sleeve component performs multiple functions: it adjusts to accommodate different hub sizes, maintains the correct geometry, and provides the quick release capability. This multi-functionality in a single component achieves ease of operation without requiring additional complex geometry maintenance mechanisms.
Data Source
AI summary
An adjustable axle retaining structure is disclosed. The structure includes an axle receiving feature on a first leg of a fork assembly and a retaining sleeve within a clamping member on a second leg of the fork assembly. An axle is inserted through the clamping member, the wheel hub and coupled with the axle receiving feature. A component of the axle is tightened thereby moving the retaining sleeve partially out of the clamping member and toward the wheel hub until the wheel hub is in contact with both the retaining sleeve and the axle receiving feature, wherein the moving of the retaining sleeve allows the axle to radially couple the wheel hub with the fork assembly without modifying a preestablished geometry of the fork assembly.