Socket Joint Sealing Structure for Wear Indicator and Preload Control
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Solution Overview
Problem
Existing socket joints using Belleville washers as preloads face challenges in achieving precise sealing and preload control due to the lack of a suitable sealing mechanism when a wear indicator is integrated, as thicker rubber cushions are being replaced by Belleville washers for cost and performance reasons.
Innovation Solution
A socket joint design incorporating an elastomeric seal located between the wear indicator and the Belleville washer, with a domed cover plate creating a sealing engagement, ensures effective sealing and consistent preload by using a Belleville washer for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber cushion is used to seal the joint assembly, then sealing is achieved, but preload control precision deteriorates
Solution Approach 1:
The sealing function and preload function are separated into two distinct components: an elastomeric seal for sealing and a Belleville washer for preload control. This segmentation allows each component to be optimized for its specific function, achieving both reliable sealing and precise preload control independently.
Solution Approach 2:
The elastomeric seal acts as an intermediary component between the wear indicator assembly and the cover plate, providing the sealing function that allows the Belleville washer to focus solely on preload control without compromising sealing integrity.
2Manufacturing precision
If a Belleville washer is used for preload control, then preload precision is improved, but sealing capability deteriorates
Solution Approach 1:
The system divides the combined sealing and preload control function into two separate components: the Belleville washer handles preload control with high precision, while the elastomeric seal provides the necessary sealing capability. This eliminates the trade-off present in using a single component for both functions.
Solution Approach 2:
The elastomeric seal serves as a multi-functional component that provides both sealing and positioning functions, allowing the Belleville washer to专注于preload control while the seal ensures environmental protection and proper component alignment.
3Reliability
If thicker rubber cushions are used, then sealing is improved, but device complexity increases
Solution Approach 1:
The elastomeric seal is a simple, inexpensive component that provides effective sealing without the complexity of thicker rubber cushions. It is designed as a thin, replaceable element that maintains sealing integrity while simplifying the overall assembly structure and reducing manufacturing costs.
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 provides improved sealing and consistent preload, preventing grease leakage and water intrusion while allowing for precise wear indication, enhancing axial deflection performance and durability.
Implementation Method 1
an elastomeric seal located at least partially between the wear indicator and the Belleville washer
Implementation Method 2
a Belleville washer... The Belleville washer has a frustoconical shape that is oriented in a concave down position
Data Source
AI summary
A socket joint includes a stud, a wear indicator configured to indicate a degree of wear relating to the stud or relating to a position of the stud, an elastomeric seal, and a Belleville washer. The elastomeric seal is located at least partially between the wear indicator and the Belleville washer. In some implementations, a domed cover plate is configured to help create a sealing engagement between the elastomeric seal, the wear indicator, and the Belleville washer when the cover plate is pressed into the internal bore of the housing of the socket joint.