Insulated Bearing Outer Race With Expanding Groove Insert
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle bearing assemblies face issues with unintended motion due to rotational forces, leading to wear and misalignment, and electrical currents passing through metal-to-metal contacts can impede bearing function and cause misalignment.
Innovation Solution
A vehicle bearing outer face construction system that includes a bearing with a bearing outer race featuring circumferential grooves, where an expanding member, such as elastomeric rubber or foam, is received in these grooves. The expanding member expands to make direct contact with the housing inner face, mitigating motion and creating a friction force to prevent slippage, while also providing electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sliding fit is used between the bearing and housing, then the bearing can be easily installed, but unintended motion occurs due to rotational forces causing wear and misalignment
Solution Approach 1:
The expanding member transitions from a compressed state during installation to an expanded state during operation, dynamically adapting the fit between bearing and housing. This allows easy installation in the compressed state while achieving stable positioning when expanded, resolving the contradiction between ease of installation and bearing stability.
Solution Approach 2:
The expanding member changes its physical parameters (volume, radial dimension) after installation by absorbing liquid or expanding foam, transforming the fit characteristics from loose to tight. This parameter change enables both easy installation and subsequent stabilization, addressing the contradiction between installation ease and operational reliability.
2Reliability
If metal-to-metal contact is used between bearing and housing, then electrical current can pass through, but this impedes bearing function and causes misalignment
Solution Approach 1:
The expanding member is made of elastomeric material that combines mechanical cushioning properties with electrical insulation characteristics. This single composite material simultaneously addresses both the need for electrical insulation and bearing stability without requiring separate insulating components, thus managing device complexity while improving reliability.
Solution Approach 2:
The expanding member acts as an intermediary between the bearing outer race and housing, replacing direct metal-to-metal contact. This intermediary provides both mechanical support and electrical insulation, resolving the contradiction between electrical insulation requirements and bearing construction complexity.
3Reliability
If an expanding member is added to the bearing assembly, then motion between bearing and housing is mitigated, but the device complexity increases
Solution Approach 1:
The expanding member performs multiple functions simultaneously: it provides motion mitigation through friction, enables easy installation when compressed, achieves stabilization when expanded, and provides electrical insulation. This multi-functionality reduces the need for separate components, managing device complexity while improving reliability.
Solution Approach 2:
The expanding member is self-activating through absorption of liquid or expansion foam, requiring no external actuation mechanism. This self-service capability eliminates the need for complex control systems while achieving reliable motion mitigation, resolving the contradiction between reliability and device complexity.
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
The system effectively reduces wear and misalignment by stabilizing the bearing within the housing, generates a friction force to prevent slippage, and provides electrical insulation to prevent current-induced issues, thereby enhancing the reliability and longevity of the bearing assembly.
Implementation Method 1
a liquid applied one of into the at least one circumferential groove prior to installation of the expanding member or applied onto the expanding member during or after receiving the expanding member initiates radial expansion of the expanding member
Implementation Method 2
a friction force is created by direct contact between the expanding member and the housing inner face
Implementation Method 3
a material of the expanding member includes an impedance mitigating against an electrical current passing between the bearing and the housing
Data Source
AI summary
A bearing outer face construction system includes a bearing having a bearing outer race. The bearing outer race includes an outer race surface. At least one circumferential groove is recessed into the bearing outer race. An expanding member is received in the at least one circumferential groove. A housing receives the bearing having a gap between a housing inner face and the bearing outer race. The expanding member expands to radially extend across the gap into direct contact with the housing inner face to mitigate against motion between the bearing and the housing inner face.