Universal Joint Seal Assembly Axial Movement Control
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Solution Overview
Problem
Existing universal joint seal assemblies can separate during handling, causing installation issues due to their design, which affects the sealing effectiveness and protection against contaminants.
Innovation Solution
A seal assembly with a first and second portion, including annular wall members and radially extending wall members, is sealingly engaged to the bearing cup and spider, with a bumper to limit axial movement, ensuring secure engagement and effective sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal assembly is designed with multiple separate portions to achieve effective sealing, then sealing effectiveness is improved, but the seal assembly can separate during handling causing installation issues
Solution Approach 1:
The seal assembly is divided into a first portion (dust shield with first seal member) and a second portion (second seal member with bumper), where each portion serves a specific sealing function. The segments are designed to work together to provide comprehensive sealing while maintaining individual structural integrity for easier handling and installation.
2Reliability
If a seal assembly uses multiple seal members and wall members to provide comprehensive sealing, then sealing effectiveness is improved, but device complexity increases
Solution Approach 1:
The dust shield is integrated with the first seal member to form a unified first portion, and the second seal member is combined with the bumper to form a unified second portion. This merging reduces the number of separate components while maintaining comprehensive sealing functionality, thereby simplifying the overall assembly process.
3Object-affected harmful factors
If a seal assembly includes a dust shield and multiple seal members to protect against contaminants, then protection effectiveness is improved, but ease of manufacture decreases
Solution Approach 1:
The dust shield is pre-formed with an integrated first seal member attached to its inner surface, creating a pre-assembled first portion. This preliminary action allows the dust shield and first seal member to be manufactured and prepared separately, then easily combined, improving both contaminant protection and manufacturing efficiency.
Data Source
AI summary
A universal joint that includes a spider, which has a trunnion, a bearing cup, a bearing, which is disposed between the trunnion and the bearing cup, and a seal assembly. The seal assembly has a first portion, which is engaged to the spider, and a second portion that sealingly engages the bearing cup and the first portion. The first portion can include features that limit axial movement of the second portion relative to the first portion.