Bearing Cage and Auxiliary Ring Assembly for Standardized Outer Rings
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Solution Overview
Problem
Existing rolling-element bearing units for truck wheel bearings face challenges in achieving efficient designs that accommodate varying geometries and load-bearing capacities while maintaining a low weight and cost-effectiveness, particularly in using preassembled standardized outer rings.
Innovation Solution
Incorporating an auxiliary ring with a radially inwardly projecting flange and a connecting unit with radially outwardly extending lugs, allowing for a captive connection to the cage, which enables the use of standardized outer rings with reduced axial length, enhancing flexibility and cost-effectiveness, and enabling assembly of custom units from existing parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If standardized outer rings with reduced axial length are used, then weight is reduced and cost-effectiveness is improved, but the ability to accommodate various geometries and load-bearing capacities is worsened
Solution Approach 1:
The auxiliary ring serves multiple functions: it extends the axial length of the standardized outer ring to accommodate different bearing geometries, provides mounting surfaces for seals, and enables the use of a single standardized outer ring design across multiple applications with varying requirements. This multi-functional component allows standardized outer rings to be adapted to different geometries and load-bearing capacities without requiring custom-manufactured rings for each application.
2Adaptability or versatility
If auxiliary rings are added to extend axial length, then adaptability to various geometries is improved, but device complexity is worsened
Solution Approach 1:
The auxiliary ring is integrated with the cage through a connecting unit, merging the function of axial extension with the cage structure. The connecting unit with radially outwardly extending lugs engages with the auxiliary ring to provide a captive connection, combining multiple components into a unified assembly that reduces overall complexity while maintaining adaptability to various geometries.
3Reliability
If connecting units with lugs are used to secure auxiliary rings, then reliability of component retention is improved, but manufacturing complexity is worsened
Solution Approach 1:
The connecting unit is segmented into discrete lugs that extend radially outwardly from the cage. Each lug can be independently formed and positioned, allowing for simplified manufacturing processes such as stamping or injection molding. This segmented design provides reliable retention of the auxiliary ring through multiple engagement points while maintaining ease of manufacture through modular component formation.
Data Source
AI summary
A rolling-element bearing unit includes at least one outer ring, at least one inner ring, at least one cage, and a plurality of rolling elements between the outer ring and the inner ring and disposed in pockets of the cage. At least one auxiliary ring is disposed axially adjacent to the outer ring, and the cage includes connecting elements, such as radially outwardly extending lugs, for captively connecting the auxiliary ring to the cage.