Suspension Link Bushing with Spherical Surfaces
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Solution Overview
Problem
Current suspension sway bar stabilizer links suffer from minimal preload, steel-to-steel contact, lack of lubrication, and poor sealing, leading to accelerated wear, noise, and reduced vehicle control due to foreign material intrusion and harsh environmental conditions.
Innovation Solution
A suspension link assembly featuring a link member with a shank and head portion, including inwardly directed concave and convex surfaces and bushings with matching spherical surfaces, which provide self-alignment and angular movement, eliminating the need for lubrication and allowing for constant preload to absorb impact loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ball-type design with steel ball and steel liner is used, then rotatability and angular movement are provided, but steel-to-steel contact causes accelerated wear and noise
Solution Approach 1:
The patent introduces a polymer liner as an intermediary material between the steel ball and the outer housing. This liner mediates the contact interface, replacing direct steel-to-steel contact with steel-to-polymer contact, thereby reducing wear and noise while maintaining the required rotatability and angular movement capabilities
2Device complexity
If minimal preload is applied to the steel ball, then the design is simpler, but foreign material intrusion causes rust and degradation
Solution Approach 1:
The patent employs a polymer liner that acts as a flexible protective shell surrounding the steel ball. This liner provides a barrier against foreign material intrusion and moisture, preventing rust and corrosion of the steel ball without requiring complex preload mechanisms or sealing systems
3Device complexity
If no lubrication provision is made, then the design is simpler, but accelerated wear occurs due to lack of lubrication
Solution Approach 1:
The polymer liner material itself provides self-lubricating properties, eliminating the need for external lubrication systems. The material composition and surface characteristics of the liner reduce friction between moving parts, providing continuous lubrication without requiring maintenance or additional lubrication mechanisms
4Device complexity
If poor sealing is provided, then the design is simpler, but intrusion of foreign material causes rust and degradation
Solution Approach 1:
The polymer liner serves as a flexible sealing barrier that prevents foreign material and moisture from reaching the steel ball and internal components. This liner provides effective sealing without requiring complex multi-component sealing systems, maintaining simplicity while ensuring corrosion protection
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
The design enhances durability and reduces noise by minimizing clearance and wear, providing improved vehicle control and extending the life of the link assembly without the need for frequent replacement.
Implementation Method 1
bushings with matching spherical surfaces, which provide self-alignment and angular movement
Implementation Method 2
allowing for constant preload to absorb impact loads
Data Source
AI summary
A suspension link assembly is provided. The link assembly includes a link member having a head portion and a shank. The head portion has a concave surface. The head portion further includes a convex surface. At least one bushing is provided. The bushing has convex and concave surfaces for respectively engaging the concave and convex surfaces of the head portion. A tapered aperture extends through the head portion from the convex surface to the concave surface.