Adjustable Ball Joint Coupling for Suspension Alignment
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Solution Overview
Problem
Existing ball joints in vehicle suspensions lack the ability to adjust suspension alignment characteristics like wheel camber and toe without modifying the steering knuckle or lower control arm, limiting flexibility in compact suspension assemblies.
Innovation Solution
An adjustable ball joint assembly with a mounting plate and cam bolts that allows for 3-point attachment to the lower control arm, enabling lateral and angular adjustments of the ball joint relative to the steering knuckle and control arm, along with a grease fitting to reduce wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a compact steering knuckle and control arm design is used, then the suspension assembly is simplified and space is reduced, but the ability to adjust suspension alignment characteristics (camber and toe) is lost
Solution Approach 1:
The ball joint assembly is segmented into a fixed upper portion (stud coupling to knuckle) and an adjustable lower portion (mounting base coupling to control arm). This segmentation allows the mounting base to be independently positioned relative to the control arm through elongated slots, enabling alignment adjustment without modifying the knuckle or control arm structures themselves.
Solution Approach 2:
The mounting base incorporates elongated slots with pillars that allow dynamic repositioning of the ball joint's lower attachment point. The slots provide a range of positions along their length, allowing the alignment characteristics to be adjusted dynamically during vehicle assembly or maintenance without requiring structural modifications to the knuckle or control arm.
2Device complexity
If the ball joint position is fixed relative to the control arm, then the structure is simplified, but adjustment of wheel camber and toe requires modification of the knuckle or control arm
Solution Approach 1:
The mounting base acts as an intermediary component between the control arm and the ball joint stud. It features elongated slots that receive pillars, creating a mediator mechanism that allows positional adjustment. This intermediary structure enables alignment adjustment without requiring modifications to the knuckle or control arm, maintaining their original manufactured forms.
Solution Approach 2:
The elongated slots in the mounting base allow change in the positional parameter of the ball joint's lower attachment point. By moving the attachment point along the slot length, the alignment parameters (camber and toe) can be adjusted without changing the fundamental structure or requiring re-manufacturing of the knuckle or control arm components.
3Adaptability or versatility
If elongated slots with pillars are used in the mounting plate, then lateral and angular adjustment of the ball joint is enabled, but the device complexity increases
Solution Approach 1:
The mounting plate is segmented into multiple functional elements: elongated slots for lateral adjustment, pillars for positioning, and attachment points for securing the ball joint. This segmentation allows each element to perform its specific adjustment function independently, providing comprehensive alignment flexibility while keeping the overall structure manageable through modular design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables adjustment of wheel camber and toe without modifying the knuckle or lower control arm, enhancing tread life and providing flexible alignment options in compact suspension systems.
Implementation Method 1
The cam bolt includes a cam portion and a bolt portion, wherein the cam portion engages with the pillars and the bolt portion extends through the slot. The cam portion may be fixed to or removable from the bolt portion. When the cam bolt is turned the lower end of the ball joint is laterally moved in and out relative to the center axis of the ball joint.
Implementation Method 2
A grease fitting is coupled to an enclosed end portion of the ball joint. Grease may be forced into a cavity of the ball joint to provide grease to a ball and socket of the ball joint thereby reducing wear of the ball joint.
Data Source
AI summary
An apparatus is described for interconnecting a steering knuckle and lower suspension arm. The apparatus includes a ball joint assembly having a lateral adjustment feature that allows for increased range of adjustment.