Lubricant-Filled Integral Wheel Hub for Self-Lubricating Bearings
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Solution Overview
Problem
Traditional wheels with integrally formed hubs are time-consuming to assemble and require periodic lubrication of tapered roller bearings, which can reduce service life if not done correctly.
Innovation Solution
A wheel design with an integrally formed hub and lubricant reservoir that lubricates the axle and bearings as it rotates, using agitating fins to circulate lubricant and reduce friction, and a hub cap to seal and monitor lubricant levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional two-part wheels with tapered roller bearings are used, then assembly is simpler, but assembly time increases and periodic lubrication maintenance is required
Solution Approach 1:
The wheel design merges the hub and wheel into a single integrally formed component, eliminating the need to assemble separate hub and wheel parts. This reduces assembly time and steps while maintaining structural integrity, directly addressing the contradiction between ease of manufacture and assembly time loss.
2Reliability
If traditional tapered roller bearings with grease packing are used, then initial lubrication is provided, but periodic replacement is time-consuming and can reduce bearing service life
Solution Approach 1:
The bearing lubrication system is designed to be self-service through an integrated lubricant reservoir that automatically supplies lubricant to the bearings during wheel rotation. The reservoir includes a lubricant delivery mechanism that continuously or periodically replenishes bearing lubrication without requiring external intervention, eliminating periodic maintenance time and preserving bearing service life.
Solution Approach 2:
The lubricant reservoir is pre-filled with adequate lubricant quantity during manufacturing, providing preliminary lubrication action that eliminates the need for future lubrication maintenance. This preliminary preparation ensures continuous bearing protection throughout the bearing's service life without requiring periodic human intervention.
3Strength
If integrally formed hubs are used to improve strength, then structural integrity improves, but manufacturing complexity increases
Solution Approach 1:
While the hub and wheel are integrally formed for strength, the lubrication system is segmented into distinct functional components: a lubricant reservoir, a delivery mechanism with channels or passages, and bearing interfaces. This segmentation allows each component to be optimized independently while maintaining the overall integral structure, reducing manufacturing complexity without compromising structural integrity.
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
Enhances structural integrity, reduces assembly time, and provides continuous lubrication, minimizing wear and tear on bearings and axles.
Implementation Method 1
the lubricant flows through the opening into the axle bore and lubricates the axle
Implementation Method 2
the agitating fins agitate and circulate the lubricant within the lubricant reservoir
Data Source
AI summary
The present invention is directed to a wheel which is adapted to be rotatably mounted on an axle. The wheel comprises a central hub, a rim which circumscribes the central hub, and a plurality of spokes which extend between and connect the central hub and the rim. The central hub, the rim, and the plurality of spokes are integrally formed as a single, unitary piece. The central hub comprises an axle bore and a lubricant reservoir. The axle bore is adapted to receive the axle for rotatably mounting the wheel thereto. The lubricant reservoir is formed within the central hub and includes an opening which opens into the axle bore. As the wheel rotates, the lubricant flows through the opening into the axle bore and lubricates the axle. Preferably, the central hub includes agitating fins located within the lubricant reservoir which agitate and circulate the lubricant as the wheel rotates.