Polymer-Coated Torque Assembly for Stable Dry Friction Control
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Solution Overview
Problem
Torque assemblies face issues due to overload situations, size complexity, torque variation over time due to wear, and performance dependency on temperature or other conditions.
Innovation Solution
A torque assembly comprising a housing with a pin and two washers, each with a compound layer of multiple polymers, that modify torque between the pin and the housing components, allowing for adjustable torque transmission without lubricants, and a locking mechanism for secure assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional torque assemblies use lubricants to reduce friction and wear, then ease of operation is improved, but reliability deteriorates due to lubricant degradation under temperature and pressure conditions
Solution Approach 1:
The patent replaces the lubrication-based friction reduction mechanism with a solid polymer compound system that provides both low friction and wear resistance without requiring liquid lubricants. The polymer compound layers on the washers create a dry lubrication effect through their inherent molecular structure, eliminating the need for lubricant maintenance while maintaining operational ease.
Solution Approach 2:
The patent uses composite polymer compounds consisting of multiple polymers (e.g., PTFE, polyacetal, polyamide) combined in specific ratios to achieve optimal balance between friction reduction, wear resistance, and temperature stability. This composite approach allows the material to maintain its properties across varying temperature and pressure conditions without degradation.
2Device complexity
If torque assemblies use simple single-material washers, then device complexity is reduced, but reliability deteriorates due to performance dependency on temperature and wear conditions
Solution Approach 1:
The patent applies composite polymer materials on the washer surfaces to achieve temperature-independent torque transmission and wear resistance. The multi-polymer compound structure provides stable friction characteristics across a wide temperature range while maintaining low wear rates, thereby improving reliability without significantly increasing device complexity.
Solution Approach 2:
The patent modifies the surface properties of the washers by applying polymer compounds with specific friction and wear characteristics. This changes the surface parameters (coefficient of friction, wear rate) to be less sensitive to temperature and load variations, thereby improving reliability while keeping the overall device structure simple.
3Power
If torque assemblies are designed for high torque transmission, then power is improved, but device complexity increases due to larger size and additional components
Solution Approach 1:
The patent uses high-performance polymer compound coatings on the washers that enable high torque transmission through optimized friction characteristics. The composite materials provide high coefficient of friction stability and wear resistance, allowing the assembly to handle higher power loads without requiring larger or more complex components.
Solution Approach 2:
The patent applies the polymer compound layers specifically at the critical contact surfaces (washer-pin and washer-housing interfaces) where torque transmission occurs. This localized application of special material properties allows high power transmission capability to be achieved without increasing the overall size or complexity of the entire assembly.
4Ease of manufacture
If torque assemblies use conventional materials subject to wear, then ease of manufacture is improved, but duration of action deteriorates due to torque variation over time
Solution Approach 1:
The patent employs wear-resistant polymer compound coatings on the washer surfaces that significantly extend the service life of the torque assembly. These composite materials exhibit low wear rates and maintain stable friction characteristics over time, preventing torque variation even after extended operation. The materials can be applied through conventional coating processes, maintaining ease of manufacture while dramatically improving duration of action.
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 a robust, adjustable, and condition-independent torque transmission system that is free from lubricants, enhancing longevity and performance while offering overload protection and reduced noise.
Implementation Method 1
a first washer comprising a compound layer thereon adapted to contact the pin and the first piece of the housing to modify torque between the first piece and the pin
Implementation Method 2
a first washer comprising a compound layer thereon adapted to contact the pin and the first piece of the housing
Data Source
Figure 1A~2B
Figure 3A~3D
AI summary
A torque assembly including a housing including a first piece including a first face, a bore, and a first coupling attachment, and a second piece including a second coupling attachment; a pin including a flange and a pin protrusion extending therefrom, the pin protrusion protruding through the bore of the first piece; a first washer including a compound layer thereon adapted to contact the pin and the first piece of the housing to modify torque between the first piece and the pin; and a second washer including a compound layer thereon adapted to contact the pin and the second piece of the housing to modify torque between the second piece and the pin.