Ball Joint Spacer for Steering Knuckle Height Adjustment
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Solution Overview
Problem
Recent changes in steering knuckle designs for light trucks with 'live' wheel hubs have reduced the space available for traditional drop spindle designs, limiting the ability to lower vehicle height and complicating the installation process, which is burdensome and costly.
Innovation Solution
A modified ball joint assembly with a spacer and attachment openings that provides a variable offset between the steering knuckle and the lower control arm, allowing for vehicle height adjustment without replacing the steering knuckle, using a bolted design compatible with 'live' wheel hubs and maintaining compatibility with stock wheels and tires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If traditional drop spindle designs are used to lower vehicle height, then vehicle height is reduced, but the space required within the steering knuckle body becomes unavailable due to new live hub assembly designs
Solution Approach 1:
The ball joint assembly is divided into separate components: a ball joint body and a ball joint spacer. The spacer is a distinct element that can be pressed into the control arm opening, allowing the overall assembly length to be extended without increasing the volume of the main knuckle body. This segmentation enables height adjustment while working within the constrained space of modern live hub assemblies.
Solution Approach 2:
The ball joint spacer is nested within the control arm opening, and the ball joint body is positioned within the steering knuckle. This nested arrangement allows the spacer to provide the necessary offset distance without occupying additional space in the knuckle body, effectively solving the space constraint problem while achieving vehicle height reduction.
2Length of stationary object
If the position of the spindle pin shaft is vertically changed to raise wheel position, then vehicle height is lowered, but the design flexibility is reduced due to large bore and bolt-pattern requirements of live hub assemblies
Solution Approach 1:
The ball joint assembly with spacer is designed to be compatible with live hub assemblies that have large bore diameters and specific bolt patterns. The spacer accommodates these variations while maintaining the ability to provide the required offset distance, making the solution universally applicable to different hub assembly designs without compromising adaptability.
3Adaptability or versatility
If factory ball joint designs are used for attachment to lower control arm, then compatibility with control arm is maintained, but the ability to adjust vehicle height is limited
Solution Approach 1:
The ball joint spacer acts as an intermediary element between the control arm and the ball joint body. It is pressed into the control arm opening and provides the necessary offset distance, while the ball joint body maintains compatibility with the steering knuckle. This intermediary spacer enables both control arm compatibility and adjustable vehicle height.
Data Source
AI summary
The present invention is a modified ball joint assembly for attachment to a steering knuckle made up of a body and a spacer. The body includes a ball joint at one end, a set of attachment openings at the other end, and a variably spaced segment between the ends. The spacer inserts into a void in the lower control arm of the vehicle, and includes a plurality of complementary attachment openings for use in attaching the body and the spacer to the lower control arm. The modified ball joint assembly lowers the position of the lower control arm of the vehicle relative to the steering knuckle thereby lowering the ride height of a vehicle a desired amount without requiring the removal of or modification of the steering knuckle. The present invention allows the factory-supplied steering knuckle and tires to be used, providing a considerable cost savings to the end user. The ball joint assembly of the present invention may be used to lower the vehicle chassis on vehicles where the steering knuckles is of the large-bore “live” wheel hubs, including four-wheel drive trucks.