Bearing Assembly Common Flange Interference Fit
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Solution Overview
Problem
The manufacture of bearing rings with integrated flanges is complex and costly, and separate flanges used in rolling-element bearings can detach due to manufacturing tolerances and operational conditions, requiring additional positioning tools and risking axial displacement.
Innovation Solution
A double row bearing assembly with separately manufactured flanges, where one flange element functions as both guide and retaining flange, secured by being pressed or thermally shrunk onto the bearing rings, preventing axial displacement through interference fit or additional securing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flanges are formed one-piece with the bearing ring, then the bearing structure is more stable, but the manufacture becomes complex and cost-intensive
Solution Approach 1:
The flange is separated from the bearing ring, allowing the bearing ring to be manufactured without flanges using conventional turning tools, while the flange is produced separately and attached afterwards. This segmentation resolves the contradiction by enabling simple manufacturing of the bearing ring while maintaining the stability function through the separate flange component.
Solution Approach 2:
The flange is pre-formed as a separate component before attachment to the bearing ring. This preliminary action allows the bearing ring to be manufactured using standard processes, and the flange to be prepared in advance with precise geometry, avoiding the need for complex one-piece manufacturing while ensuring structural stability.
2Ease of manufacture
If separate retaining flanges are used, then the manufacturing complexity is reduced, but the flanges can detach due to manufacturing tolerances and operational conditions
Solution Approach 1:
The guide flange and retaining flange functions are merged into a single common flange element that is shared by both rolling-element bearings. This merging ensures that the flange cannot detach individually and resolves the reliability issue while maintaining manufacturing simplicity through standardized production of the common flange element.
Solution Approach 2:
The common flange element acts as an intermediary component between the two bearing rings, providing a stable connection point that prevents detachment. This intermediary structure ensures reliable retention while allowing separate manufacturing of the flange and bearing rings.
3Ease of manufacture
If separate flanges are used in double row bearings, then the manufacturing cost is reduced, but axial displacement of flanges can occur due to manufacturing tolerances
Solution Approach 1:
By merging the flange functions for both bearings into a single common flange element, the number of separate flange components is reduced from two to one. This eliminates the accumulation of manufacturing tolerances between multiple flanges and ensures precise positioning while maintaining cost benefits from simplified manufacturing.
Solution Approach 2:
The common flange element serves multiple functions: it acts as both the guide flange and retaining flange for both the first and second rolling-element bearings. This multi-functionality ensures precise positioning and eliminates axial displacement issues while reducing the total number of components and manufacturing steps.
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
This configuration simplifies and secures the positioning of flanges, reducing manufacturing complexity and preventing flange slippage, ensuring stable operation and reduced manufacturing costs.
Implementation Method 1
the common flange element being heated, thereby expanding due to the material, and being pushed onto the bearing rings in the heated state. With the cooling of the common flange element it contracts again so that a press fit of the common flange element on the bearing rings is formed
Data Source
AI summary
A bearing assembly includes first and second rolling-element bearings each having first and second bearing rings, a raceway and a flange element at both ends of the raceways. Two of the flange elements are formed on a common flange body, and the flange body is axially pressed onto cylindrical mounting surfaces of the first bearing rings of the first and second rolling-element bearings and held in place by a press fit.