Low-Friction Strut Bearing Assembly for Consistent Torque
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Solution Overview
Problem
Existing strut bearings in suspension assemblies for vehicles often cause uneven torque, unwanted friction, vibration, and noise due to their design, which affects the performance and longevity of the assemblies.
Innovation Solution
A strut bearing with a housing comprising a top piece and a bottom piece, featuring at least one low friction component made from materials like polyketone or metal, with a low friction layer and an adhesive layer, designed to reduce friction and enhance assembly performance by allowing smooth rotation and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional ball bearing or sliding bearing components are used in strut bearings, then the bearing can provide rotational movement, but it causes uneven torque, unwanted friction, vibration, and noise
Solution Approach 1:
The patent changes the material parameters by using polymeric materials with specific friction characteristics instead of traditional metal ball bearings or sliding bearings. The polymer material is selected to have a coefficient of friction between 0.15 and 0.35, which provides consistent torque and reduces harmful friction, vibration, and noise while still allowing rotational movement.
Solution Approach 2:
The patent employs composite material structures, specifically using polymeric materials that may be combined with fillers or reinforced with fibers to achieve the desired friction characteristics. This composite approach allows optimization of both the friction properties and mechanical strength to resolve the contradiction between enabling rotation and minimizing harmful effects.
2Strength
If traditional bearing materials are used, then the bearing can support loads, but it generates uneven torque and increases wear
Solution Approach 1:
The patent changes the material parameters by selecting polymers with specific mechanical properties including tensile strength, elongation at break, and friction coefficients. These parameter changes enable the material to support loads while providing consistent torque and reduced wear compared to traditional bearing materials.
Solution Approach 2:
The patent uses polymer materials that can be easily replaced and are cost-effective, providing a practical solution for wear-resistant bearings that maintain reliability over their service life while being economically viable for replacement if needed.
3Object-generated harmful factors
If complex bearing assemblies are used to reduce friction, then friction decreases, but the assembly complexity increases
Solution Approach 1:
The patent extracts the complex multi-component bearing assemblies (ball bearings, multiple sliding surfaces, lubrication systems) and replaces them with a single polymer bearing component. This extraction simplifies the assembly while maintaining low friction through the inherent properties of the polymer material.
Solution Approach 2:
The polymer bearing component performs multiple functions simultaneously: it provides low friction surfaces, maintains consistent torque, absorbs vibration, and supports loads, all within a single component design. This multi-functionality reduces assembly complexity compared to traditional multi-component bearing systems.
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 solution provides consistent torque, decreased friction, reduced vibration, and noise, while simplifying assembly and increasing the lifespan of suspension components by utilizing low friction materials and designs that allow for efficient sliding interfaces.
Implementation Method 1
the low friction component includes a low friction material... designed to reduce friction and enhance assembly performance
Data Source
Figure 1~2B
Figure 3~5
Figure 6A~7
AI summary
A strut bearing including a housing including a top piece and a bottom piece, and a plurality of low friction components each comprising a low friction layer comprising a low friction material, wherein the plurality of low friction components are bonded to the top piece or the bottom piece of the housing.