Integrated CV Joint Hub Structure to Eliminate Backlash
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing constant velocity apparatuses experience issues such as joints backlash, nut loosening, and weight-related problems due to the coupling between the constant velocity apparatus and the hub bearing, which affect power transmission and vehicle performance.
Innovation Solution
A hub built-in type constant velocity apparatus is designed by integrating a hub housing with a constant velocity joint and an external race, incorporating a pre-load ring and low friction washer to reduce friction and improve articulation angle, weight, and manufacturing efficiency, while maintaining sealing integrity through specific structural features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the constant velocity apparatus and hub bearing are coupled by a spline, then power transmission is enabled, but joints backlash and nut loosening occur
Solution Approach 1:
The patent merges the constant velocity apparatus housing with the hub bearing outer race into a single integrated component. This eliminates the spline coupling between separate parts, thereby removing the sources of backlash and nut loosening while maintaining power transmission functionality through the integrated structure
Solution Approach 2:
The integrated hub bearing outer race serves multiple functions simultaneously: it acts as the housing for the constant velocity apparatus, the outer race for the wheel bearing, and the mounting structure for the constant velocity joint. This multi-functionality eliminates the need for separate coupling components
2Ease of manufacture
If the constant velocity apparatus and hub bearing are assembled as separate components, then manufacturing and assembly are simplified, but component complexity and weight increase
Solution Approach 1:
The patent combines multiple components (constant velocity apparatus housing, hub bearing outer race, and mounting structure) into a single integrated part. This reduces the total number of components, simplifies assembly operations, and decreases overall weight while maintaining manufacturability through integrated forming processes
Data Source
AI summary
A hub built-in type constant velocity apparatus includes a hub housing with a constant velocity joint coupled inwardly, an internal race coupled to an external circumferential surface of the hub housing, and a pre-load ring coupled to the external circumferential surface of the hub housing and located on a side of the internal race, wherein an end portion of the hub housing is formed to be rolled upwards toward the pre-load ring to form a forming portion coupled to the pre-load spring for applying pressure to the pre-load ring and the internal race.