Wheel Hub Bearing Threaded Mounting Aluminum Stub Axle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wheel hub bearing systems face challenges in secure and complex-free mounting, particularly when materials with differing temperature expansion coefficients are used, leading to deformation issues and restricted spatial arrangements of components like the hub bearing, wheel carrier, and brake caliper.
Innovation Solution
A wheel hub bearing unit with a roller bearing featuring an outer ring and inner ring, where the outer ring is equipped with a threaded element for mechanical engagement with a corresponding threaded element on the wheel carrier, allowing for secure and precise positioning without additional fixing elements, and utilizing a hexagon arrangement for easy installation and self-locking friction to prevent loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If press fit connection is used between bearing outer ring and stub axle, then mounting simplicity is improved, but component deformation occurs due to excessive pressing force required for materials with widely differing temperature expansion coefficients
Solution Approach 1:
The patent replaces the press fit mechanical connection system with a threaded fastening system. The bearing outer ring is equipped with a threaded element that engages with a corresponding threaded element in the stub axle, eliminating the need for excessive pressing force and preventing component deformation while maintaining secure mounting.
2Strength
If threaded bolts are used to connect bearing outer ring to stub axle, then component deformation is avoided, but installation complexity increases and spatial arrangement restrictions are imposed
Solution Approach 1:
The patent merges the bearing outer ring with a threaded fastening element, integrating the connection function directly into the bearing component. This eliminates the need for separate threaded bolts and additional fixing elements, reducing installation complexity while maintaining secure connection and avoiding spatial arrangement restrictions.
3Weight of moving object
If aluminum materials are used for stub axles to reduce weight, then unsprung mass is reduced, but press fit mounting becomes difficult due to widely differing temperature expansion coefficients
Solution Approach 1:
The patent replaces the press fit mechanical system with a threaded fastening system that is compatible with aluminum materials. The threaded elements in both the bearing outer ring and aluminum stub axle allow for secure connection without requiring excessive pressing force, enabling weight reduction while maintaining manufacturability.
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 solution enables reliable, secure, and simplified mounting of the wheel hub bearing unit, reducing installation complexity and avoiding restrictions in spatial arrangements, while maintaining secure engagement and reducing unsprung mass through the use of aluminum components.
Implementation Method 1
The outer ring is equipped with a threaded element for mechanical engagement with a corresponding threaded element on the wheel carrier
Implementation Method 2
utilizing a hexagon arrangement for easy installation and self-locking friction to prevent loosening
Data Source
AI summary
A wheel hub bearing unit of a motor vehicle includes at least one roller bearing for mounting a wheel hub. The roller bearing contains an outer ring which, on an outer peripheral face, is at least partially equipped with a first threaded element and at least one inner ring, and a wheel carrier with a mounting hole. A wall of the mounting hole is at least partially equipped with a second threaded element that is provided for mechanical engagement with the first threaded element. The outer ring and the wheel carrier each have at least one contact face, which are provided to come into mutual mechanical contact when the roller bearing is mounted in the wheel carrier.