Wheel Hub Assembly With Outer-End Bearing Replacement
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Solution Overview
Problem
Existing wheel hub assemblies require complex and often impossible access to the inner end of the upright for assembly and maintenance, with embedded bearing members that necessitate replacement of the entire assembly upon malfunction or adjustment.
Innovation Solution
A wheel hub assembly design featuring a hub with a bore and shaft that can be removably inserted and assembled through an outer end cavity opening, utilizing bearing assemblies with annular housings and a fastening system, including a castle nut and retaining ring, to allow for preloading and easy replacement of bearing assemblies without accessing the inner end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bearing members are embedded within the hub assembly, then the hub assembly achieves structural integrity and stability, but the bearing members cannot be replaced and the entire hub assembly must be replaced upon malfunction
Solution Approach 1:
The hub assembly is divided into separable components: the hub body, bearing assemblies, and fastening members. The bearing assemblies are positioned in bearing cavities with retaining structures (shoulders and grooves) that allow them to be independently installed and removed without replacing the entire hub assembly, while still providing structural integrity when assembled.
Solution Approach 2:
The fastening members (such as adjustable members or threaded members) enable dynamic adjustment and secure fastening of the bearing assemblies to the hub shaft. This allows the bearing assemblies to be firmly fixed during operation for reliability, yet easily removed when maintenance is needed by simply loosening the fastening members.
2Ease of manufacture
If the hub needs to be accessed from both inner end and outer end of the upright for assembly, then proper assembly and fastening can be achieved, but the assembly process becomes complex and in some cases impossible
Solution Approach 1:
Instead of requiring access from both inner and outer ends of the upright, the bearing assemblies are designed to be installed and fastened primarily through the outer end. The fastening members extend through the hub shaft and engage with the bearing assemblies, allowing secure assembly from the outer end without needing to access the inner end of the upright.
Solution Approach 2:
The fastening mechanism utilizes the axial dimension by extending fastening members through the hub shaft in the axial direction. This allows the bearing assemblies to be secured along the axial axis from the outer end, transforming the assembly approach from requiring bidirectional access to unidirectional access through dimensional reorientation.
3Ease of repair
If bearing assemblies are made removable and insertable through the outer end, then ease of replacement and maintenance is improved, but the structural stability and secure fastening may be compromised
Solution Approach 1:
The hub shaft includes pre-formed bearing cavities with retaining structures (shoulders and grooves) that are prepared in advance to receive and retain the bearing assemblies. These preliminary structural features ensure that when the bearing assemblies are installed, they are automatically positioned and retained securely without requiring complex fastening operations, thus maintaining structural stability while enabling easy replacement.
Solution Approach 2:
The fastening members act as intermediaries between the hub shaft and the bearing assemblies. These members (such as adjustable members or threaded members) provide a mechanical connection that secures the bearing assemblies firmly to the hub shaft, ensuring structural stability during operation while allowing the bearing assemblies to be removed when needed by simply loosening the fastening members.
Data Source
AI summary
A wheel hub assembly couplable to an upright including an axial hub cavity having a cavity opening at an outer end of the upright, the wheel hub assembly may include: a hub extending axially along a rotation axis, the hub comprising a bore extending axially along the rotation axis; a hub shaft extending through the bore of the hub; one or more bearing assemblies, each bearing assembly including an annular housing surrounding at least a portion of the hub; and a fastening assembly to affix the hub and the hub shaft together; wherein the hub shaft, the hub and the one or more bearing assemblies are removably insertable into the hub cavity and assemblable within the hub cavity through the cavity opening.