Slip Yoke Sealing Assembly for Lubricant Leak Prevention
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Solution Overview
Problem
Slip yoke assemblies in vehicle driveshaft systems experience lubricant leakage and contamination issues due to axial translation, leading to reduced lifespan under heavy torque loads.
Innovation Solution
A slip yoke assembly design featuring a counterbore with an annular groove and a sealing member, secured by a plug with a contiguous annular lip, provides a fluid-tight seal to prevent lubricant leakage and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluid tight closure is provided at the end of the slip yoke, then lubricant leakage is prevented and contaminants are kept out, but under heavy torque loads and extended operation, lubricant leakage and contaminant entry still occur
Solution Approach 1:
The sealing system is divided into multiple components: a sealing member (such as an O-ring) positioned in a groove, and a separate plug with a lip that engages the groove. This segmentation allows each component to perform its specific sealing function independently, creating redundant sealing paths that prevent lubricant leakage and contaminant ingress even under extended heavy torque loads
Solution Approach 2:
The lip of the plug acts as an intermediary element that bridges the gap between the sealing member and the counterbore. The lip engages with the groove to provide mechanical retention and additional sealing contact, while the sealing member provides the primary fluid barrier. This intermediary structure ensures reliable sealing performance over extended service life
2Ease of manufacture
If a simple open end design is used, then manufacturing is easier and assembly is simpler, but lubricant leaks and contaminants enter the assembly
Solution Approach 1:
The plug and sealing member are designed to be installed in advance during assembly, creating a pre-established barrier against contaminants before the assembly enters service. The lip is formed on the plug to engage the groove, providing a ready-made sealing structure that prevents contaminant ingress without complicating the manufacturing of individual components
Solution Approach 2:
The sealing member, typically made of flexible rubber or elastomeric material, is positioned in the groove and deformed by the lip engagement to create an effective seal. This flexible element conformally seals against the counterbore surface, preventing contaminant entry while maintaining ease of manufacture through simple geometric features
Data Source
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AI summary
A slip yoke assembly is provided. The slip yoke assembly includes a slip yoke having a long bore extending between a first end and a second end and a counterbore at the second end of the long bore. The counterbore has a first wall which defines a first diameter which is greater than a major diameter of the long bore. An annular groove is positioned between the long bore and the first diameter. A sealing member is disposed within the annular groove. The slip yoke assembly also includes a plug disposed within the counterbore and over the sealing member. The plug is secured to the slip yoke by a lip formed over the plug.