Laminate Plain Bearing With Curved End for Misalignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current plain bearings lack enhanced performance and design features that could improve their functionality, particularly in applications requiring low friction and durability, such as vehicle door hinge assemblies, where they may be exposed to surface treatments and potential damage from airborne particles.
Innovation Solution
A plain bearing design featuring a generally cylindrical sidewall with a curved portion at an axial end, utilizing a laminate structure with a low friction material and a substrate, where the low friction material is non-conductive and has a dynamic coefficient of friction less than 0.7 against steel, and the curved portion is formed from a single piece of continuous material, providing improved axial and radial extension and absorption of misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a plain bearing uses a low friction material with conductive properties, then friction is reduced, but the bearing becomes susceptible to damage from surface treatments and airborne particles
Solution Approach 1:
The bearing employs a composite structure consisting of a substrate material and a low friction material layer. The substrate provides mechanical strength and durability, while the low friction material layer reduces friction. This composite approach allows the bearing to benefit from both properties simultaneously.
Solution Approach 2:
The low friction material is applied as a thin film or coating on the substrate surface. This thin film configuration provides the friction-reducing properties while the underlying substrate protects against damage from surface treatments and airborne particles, effectively isolating the vulnerable low friction layer from harmful environmental factors.
2Reliability
If a bearing uses a complex laminate structure with multiple materials, then friction is reduced and durability is improved, but manufacturing complexity increases
Solution Approach 1:
The bearing is segmented into distinct functional layers: a substrate layer providing structural integrity and a low friction material layer providing reduced friction. This segmentation allows each layer to be optimized for its specific function while maintaining overall simplicity in the composite structure.
Solution Approach 2:
The invention changes the material parameters by selecting specific combinations of substrate and low friction materials with appropriate thickness ratios. By optimizing these parameters, the bearing achieves improved performance without requiring overly complex multi-layer structures, maintaining manufacturability while enhancing durability and friction characteristics.
3Adaptability or versatility
If a bearing is designed with a curved portion at an axial end, then misalignment is absorbed, but the bearing geometry becomes more complex
Solution Approach 1:
The bearing incorporates a curved portion at its axial end, replacing a straight cylindrical geometry with a curved profile. This curvature allows the bearing to accommodate and absorb misalignment between shafts and housing, providing adaptability to installation variations and operational deviations while maintaining a relatively simple overall form factor.
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 bearing achieves reduced friction and enhanced durability by using a non-conductive low friction material and a substrate, mitigating damage from surface treatments and effectively absorbing misalignment, while maintaining low friction and durability in demanding applications.
Implementation Method 1
The low friction material can have a relatively low coefficient of friction, thus facilitating easier movement between the two or more movable components
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A plain bearing comprising a generally cylindrical sidewall having a first axial end and a second axial end; and a curved portion disposed at the first axial end, wherein the generally cylindrical sidewall has a thickness, wherein the curved portion has an effective material thickness, wherein the effective material thickness of the curved portion is n-times thicker than the thickness of the generally cylindrical sidewall, and wherein n equals 2, 3, 4, or even 5.