Adjustable Ball Joint Assembly for Camber and Caster Alignment

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Solution Overview

Problem

Current suspension systems for motor vehicles lack effective mechanisms for adjusting camber and caster angles, which are crucial for optimal wheel alignment and vehicle performance.

Innovation Solution

The development of a ball joint assembly and control arm assembly that includes a housing, ball seat, and swivel plates, allowing for adjustable positioning of the ball joint assembly relative to the control arm, enabling precise adjustments to camber and caster angles through the use of slots and studs, facilitating various configurations for alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed ball joint connection is used between control arm and spindle, then the suspension system is simple and reliable, but the camber and caster angles cannot be adjusted

Engineering Contradiction:
Improveadjustability of camber and caster anglesVSAvoidcomplexity of ball joint assembly
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The ball joint assembly incorporates a slot in the control arm and a corresponding stud that can be positioned at different locations along the slot. This dynamic positioning capability allows the assembly to adapt between fixed and adjustable configurations, enabling camber and caster angle adjustments while maintaining structural integrity

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The ball joint assembly is divided into separable components including the control arm with slot, the ball joint housing with stud, and mounting plates. This segmentation allows for easy adjustment by repositioning the stud along the slot and reassembling the components, providing adjustability without requiring complete disassembly of the suspension system

Inventive Principle:
Principle #1Segmentation

2Manufacturing precision

If adjustable mechanisms are added to modify camber and caster angles, then wheel alignment precision is improved, but the suspension system complexity increases

Engineering Contradiction:
Improveprecision of wheel alignmentVSAvoidcomplexity of suspension system
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The ball joint assembly serves multiple functions: it provides the primary suspension connection, enables camber angle adjustment through stud repositioning along the slot, and allows caster angle adjustment through mounting plate orientation. This multi-functionality achieves precise wheel alignment capability without adding separate adjustment mechanisms, thereby limiting the increase in system complexity

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If the ball joint assembly is made adjustable for alignment, then versatility is improved, but the ease of manufacture decreases

Engineering Contradiction:
Improveadjustability for wheel alignmentVSAvoidease of manufacturing ball joint assembly
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The slot is pre-formed in the control arm during manufacturing, and the stud is pre-positioned at a standard location. This preliminary action allows for easy field adjustment by simply moving the stud to different positions along the pre-formed slot and securing it, providing adjustability without requiring complex post-manufacturing operations or specialized tools

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS7513514B1Adjustable ball joint connection assembly
Publication Date: 2009.04.07 SPECIALTY PRODS
  • US7513514B1 patent drawing
  • US7513514B1 patent drawing
  • US7513514B1 patent drawing

AI summary

The present invention includes a ball joint assembly having a first stud extending upward from a ball joint housing and a second stud extending from the ball joint housing opposite the first stud. The ball joint assembly is adapted to adjustably connect with a control arm through a slotted connection. The rotational position of the second stud of the ball joint assembly relative to the control arm as well as the linear position of the first stud of the ball joint assembly within the slot can be adjusted to affect the camber and/or caster angles for wheel alignment on motor vehicles.