Steering Knuckle Spindle Retention via Segmented Interference Fit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing steering knuckle assemblies lack sufficient retention strength and bending resistance, which can lead to axial movement and reduced structural integrity, especially when using industry standard hub sizes.
Innovation Solution
The steering knuckle assembly incorporates a spindle with interference fits between its circumferential surfaces and a step surface, enhancing retention force and bending resistance by engaging the spindle's circumferential surfaces with the knuckle's surfaces and inhibiting axial movement through a mechanical stop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional spindle design is used, then the assembly is simple to manufacture, but the retention strength and bending resistance are insufficient
Solution Approach 1:
The spindle is divided into multiple cylindrical sections with different diameters (first spindle section, second spindle section, third spindle section) that correspond to different engagement zones in the hole. Each section provides specific functional characteristics - the larger diameter sections provide higher retention strength while the smaller diameter sections facilitate assembly and reduce overall complexity.
Solution Approach 2:
Different portions of the spindle have different diameters and engagement characteristics tailored to their specific locations within the hole. The first, second, and third spindle sections have progressively different dimensions optimized for their respective positions, providing localized strength where needed while maintaining manufacturability.
2Strength
If the spindle diameter is increased to improve retention strength, then bending resistance improves, but the ability to accommodate industry standard hub sizes is reduced
Solution Approach 1:
The spindle is segmented into multiple diameter zones that can be independently optimized. The first, second, and third spindle sections have different diameters that can be tailored to accommodate standard hub sizes while providing sufficient bending resistance in the overall assembly configuration.
Solution Approach 2:
The spindle design incorporates variable diameter parameters along its length, with each section having specific dimensional characteristics that balance bending resistance requirements with compatibility constraints for industry standard hub sizes.
3Stability of the object's composition
If a simple hole design is used in the steering knuckle, then manufacturing is easier, but axial movement of the spindle occurs
Solution Approach 1:
The hole in the steering knuckle is divided into multiple axial zones with different diameters, creating corresponding engagement zones for the segmented spindle. This segmentation provides mechanical stops at each zone that prevent axial movement while remaining manufacturable through standard machining processes.
Solution Approach 2:
The stepped geometry of the hole acts as an intermediary structure between the spindle sections, providing mechanical engagement and axial stability without requiring complex fastening mechanisms or additional components.
Data Source
AI summary
A steering knuckle assembly having a steering knuckle and a spindle. The steering knuckle may have first and second circumferential surfaces that at least partially define a hole. The spindle may be disposed in the hole and may have first and second spindle circumferential surfaces. The first and second spindle circumferential surfaces may engage the first and second circumferential surfaces, respectively.