Spindle Sleeve Rotational Alignment via Retaining Nut
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Solution Overview
Problem
The alignment of a vehicle's wheel plane relative to its path of travel, specifically camber and toe, affects tire wear, and existing axle systems flex under load, leading to uneven tire wear due to improper rotational orientation of spindle sleeves, which is difficult to correct without a mechanism for external rotational manipulation.
Innovation Solution
A wheel hub assembly with an alignment correction spindle sleeve and a mechanism for external rotational manipulation, allowing the spindle sleeve to be properly indexed onto the axle, utilizing a spindle sleeve with an angled outer and inner surface and a sleeve washer for rotational alignment, and a retaining nut system with a snap ring for rotational communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the spindle sleeve is installed within the hub and bearing assembly, then the alignment correction function is achieved, but the rotational manipulation becomes difficult and inaccessible
Solution Approach 1:
The spindle assembly is segmented into multiple components: the hub, bearing assembly, spindle sleeve, and retaining nut. This segmentation allows the spindle sleeve to be installed within the hub for alignment correction while the retaining nut remains externally accessible for rotational manipulation. The segmented design resolves the contradiction by separating the functional component (spindle sleeve) from the operational interface (retaining nut).
Solution Approach 2:
The retaining nut acts as an intermediary mechanism that transmits rotational force to the spindle sleeve. By engaging the retaining nut externally, the installer can rotate the spindle sleeve through the intermediary action of the retaining nut, which converts external rotational input into internal rotational movement of the alignment-correcting spindle sleeve.
2Stability of the object's composition
If the axle stiffness is increased to resolve camber issues, then the camber stability improves, but the cost and material requirements increase
Solution Approach 1:
Instead of increasing axle stiffness statically, the invention introduces a dynamic adjustment mechanism through the adjustable spindle sleeve. The spindle sleeve can be rotated to different angular positions to actively correct camber variations, allowing the system to adapt to load conditions without requiring a stiffer axle. This dynamic adjustment resolves the contradiction by providing camber stability through active correction rather than passive structural reinforcement.
Solution Approach 2:
The invention changes the operational parameter of the spindle assembly by introducing adjustability. The spindle sleeve can be rotated to change the effective camber angle, allowing the same axle structure to maintain proper alignment under varying load conditions. This parameter change approach resolves the contradiction by enabling camber stability through adjustment rather than through increased structural stiffness.
3Manufacturing precision
If the spindle sleeve is properly indexed onto the axle, then the rotational alignment improves, but the installation complexity increases
Solution Approach 1:
The retaining nut is designed with preliminary alignment features that guide the spindle sleeve into the correct rotational position during installation. By incorporating alignment indicators or keyways in the preliminary design stage, the system ensures proper indexing is achieved automatically during the installation process, reducing the complexity of achieving precise rotational alignment.
Solution Approach 2:
The invention replaces complex mechanical indexing mechanisms with a simpler rotational adjustment system. Instead of using intricate gear-based or cam-based indexing mechanisms, the spindle sleeve can be directly rotated to the desired position and secured with the retaining nut. This substitution resolves the contradiction by achieving proper rotational alignment through a simpler, more direct mechanical approach.
Data Source
AI summary
An apparatus for a vehicle is provided that includes an axle with a keyway. A spindle sleeve is present that has a spindle sleeve inner surface axis coaxial with the axis of the axle. A spindle sleeve outer surface axis is not coaxial with the axis of the axle, and the spindle sleeve has a sleeve washer that has a keyway tab. A retaining nut is in selective rotating communication with the sleeve washer such that rotation of the retaining nut is communicated to the sleeve washer to cause the spindle sleeve to rotate relative to the axle when the retaining nut is in rotating communication with the sleeve washer. Rotation of the retaining nut is not communicated to the sleeve washer to cause the spindle sleeve to rotate relative to the axle when the retaining nut is not in rotating communication with the sleeve washer.