Wheel Hub Centering Part Segmentation and Stress Decoupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wheel hub centering technologies face issues with deformation-induced stresses during assembly, leading to defects and large tolerances when mounting brake discs and rims, and lack effective protection and centering functionality.
Innovation Solution
A wheel hub design featuring a one-piece outer bearing ring with an integral centering part that includes a cylindrical centering surface, a solid bottom wall for rigidity, and an annular transition zone to decouple stresses, allowing for secure attachment without brazing, welding, or gluing, and providing protection and easy access for assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a centering sleeve is fitted by force or material connection (brazing, welding, gluing) to the outer ring, then the centering function is achieved, but the attachment process induces deformations in the functional zone of the sleeve and complicates the assembly process
Solution Approach 1:
The centering part is divided into two functional zones: a mounting zone for attachment to the outer ring and a first centering zone for precise centering. This segmentation allows each zone to be optimized independently - the mounting zone can accommodate attachment deformations while the centering zone maintains precision through its cylindrical geometry and transition zone design.
Solution Approach 2:
An annular transition zone is introduced between the mounting zone and the first centering zone. This transition zone acts as a mediator that decouples the stresses from the attachment process, preventing them from propagating to the centering zone and compromising centering precision.
2Ease of manufacture
If the centering sleeve is secured to the outer ring by shrinking without brazing, welding or gluing, then the assembly process is simplified, but the stresses in the body of the sleeve induce deformations in the functional zone dedicated to centering
Solution Approach 1:
The centering part is segmented into a mounting zone for shrinking attachment and a first centering zone for precise centering, allowing the mounting zone to absorb attachment stresses while the centering zone maintains precision.
Solution Approach 2:
The annular transition zone serves as a stress-decoupling intermediary between the shrinking-mounted zone and the centering zone, enabling simple shrinking attachment without compromising centering precision.
3Manufacturing precision
If finishing operations are performed after welding the sleeve to the outer ring, then centering surfaces can be rectified, but the process becomes more complex and time-consuming
Solution Approach 1:
The first centering zone is pre-formed with high precision during the centering part manufacturing process, before attachment to the outer ring. This preliminary precision is then maintained through the attachment process due to the stress-decoupling transition zone, eliminating the need for post-attachment finishing operations.
4Object-affected harmful factors
If a cover is used to close the axial end of the wheel bearing, then protection is provided, but the centering function is lost
Solution Approach 1:
The centering part is designed to perform multiple functions: it provides centering surfaces for precise alignment, closes the axial end of the outer bearing ring to protect against pollution, and can be attached by simple shrinking without compromising either function.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A wheel hub (32) comprises a one-piece outer bearing ring (16) and a centering piece (30). The outer ring (16) has at least one external raceway rotated radially inwards and defining a reference axis of the wheel hub (32) and a tubular cavity (66), and a flange (34) provided with holes (36) for fixing a wheel rim (40).The centering piece (30) is integral with the outer ring (16) and includes at least one mounting area (48, 148) inserted in the outer ring (16), and a first centering area (52) projecting axially outwards relative to the outer ring (16), and comprising a first cylindrical centering surface (44) facing radially outwards, the centering piece (30) having an outer surface (58) facing radially outwards from the cavity (66) and including the first centering surface (44), and an inner surface (62) facing radially inwards from the cavity (66), characterized in that the centering piece (30) comprises a solid bottom wall (74) closing an axial end of the cavity (66).