Hub-Built-In CV Joint Discharge Structure for Foreign Material Removal
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Solution Overview
Problem
Constant velocity joints in vehicles are prone to malfunction due to the introduction of foreign materials and moisture, which existing designs fail to efficiently discharge, leading to potential operational issues.
Innovation Solution
A hub built-in type constant velocity joint with integrated wheel guide coupling portions and a stepped discharge portion in the hub housing allows for the easy expulsion of foreign materials and moisture, featuring a stopper to limit the depth of wheel guide insertion and a flange-mounted design for enhanced discharge efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wheel guides are coupled to the hub housing, then the constant velocity joint can be assembled, but foreign materials and moisture are trapped inside causing malfunction
Solution Approach 1:
The hub housing is segmented into multiple discharge portions positioned at different heights and locations. This segmentation allows foreign materials and moisture to be discharged through multiple pathways, preventing accumulation and improving reliability without compromising the assembly structure.
Solution Approach 2:
Discharge portions are extracted from the hub housing structure to create dedicated pathways for removing harmful factors. These openings enable foreign materials and moisture to be taken out from the sealed joint, preventing malfunction while maintaining the integrated assembly design.
2Ease of manufacture
If the hub housing is designed with integrated wheel guide coupling portions, then manufacturing complexity is reduced, but discharge of foreign materials becomes more difficult
Solution Approach 1:
The discharge structure is segmented into multiple discrete portions distributed around the hub housing perimeter. This segmentation adds minimal manufacturing complexity while effectively enabling foreign material discharge, balancing ease of manufacture with functional requirements.
Solution Approach 2:
The hub housing serves multiple functions: it provides structural support, couples wheel guides, and discharges foreign materials through integrated discharge portions. This multi-functionality reduces overall device complexity by combining assembly and discharge functions into a single component.
3Object-affected harmful factors
If multiple discharge portions are formed in the hub housing, then foreign materials can be effectively discharged, but manufacturing precision requirements increase
Solution Approach 1:
The discharge structure is divided into multiple discrete portions positioned at strategic locations around the hub housing. This segmentation allows each discharge portion to be positioned with moderate precision while collectively achieving effective foreign material discharge, reducing overall manufacturing precision requirements.
Solution Approach 2:
Different discharge portions are positioned at specific locations optimized for discharge efficiency rather than requiring uniform high-precision positioning throughout. This local optimization approach reduces manufacturing precision requirements while maintaining effective discharge performance.
Data Source
AI summary
A hub built-in type constant velocity joint may include a plurality of wheel guide coupling portions to which wheel guides are configured to be coupled, and a hub housing which is formed between the wheel guide coupling portions and in which a discharge portion is formed to be stepped with each of the wheel guide coupling portions and configured to discharge foreign materials to the outside.