Flow Shelf Roller Hub Relief Channels for Low-Friction Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roller bed systems in parcel handling devices face issues with frictional resistance due to airborne particulate matter trapping lubricants, leading to reduced wheel motion efficiency and the need for frequent maintenance.
Innovation Solution
The design incorporates rollers with a radially central hub and axially central bore featuring axial relief channels at non-perpendicular angles, crowned outer circumference, and reduced radial thickness at one end, along with low-friction materials like high-density polyethylene or nylon, to minimize friction and maintain free motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lubricants are used to reduce friction between rollers and axles, then the freedom of wheel or roller motion is improved, but airborne particulate matter is trapped by the viscous lubricants leading to increased friction over time and requiring continual cleaning and maintenance
Solution Approach 1:
The patent removes the lubricant entirely from the system by designing the roller hub with integrated low-friction surfaces and geometric features (crowned outer surface, angled chamfers, radiused corners) that minimize contact friction without requiring any lubricating substance. This extraction of the lubricant eliminates the problem of particulate trapping while maintaining low friction.
Solution Approach 2:
The patent changes the physical parameters of the roller components by modifying surface geometry (crowning the outer surface, adding angled chamfers at 30-60 degrees, creating radiused corners) and selecting materials with inherently low friction coefficients. These parameter changes allow the system to achieve low friction operation without lubricants.
2Productivity
If lubricants are used to reduce friction, then the operational efficiency of the flow shelf is improved, but the need for continual cleaning and maintenance increases time, labor and expense
Solution Approach 1:
The roller design is self-sufficient with built-in friction-reducing features that require no external lubrication or maintenance. The crowned outer surface and angled chamfers create geometric self-lubrication effects, while the low-friction materials provide inherent slip characteristics. This self-service design eliminates maintenance time while maintaining operational efficiency.
3Reliability
If the inner circumference of the roller is made smooth to reduce friction, then the freedom of motion is improved, but the structural integrity and resistance to wear may be compromised
Solution Approach 1:
The patent applies different surface qualities to different locations on the roller. The inner circumference maintains a smooth bore for rotational freedom, while the outer surface features crowned geometry and angled chamfers that provide both low friction and structural strength. This local differentiation allows each surface to optimize for its specific function.
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
This design significantly reduces frictional resistance, enhancing the operational efficiency of roller bed systems by minimizing the need for maintenance and ensuring consistent parcel handling performance.
Implementation Method 1
The inner circumference of each roller has at least one axial relief channel formed therein along the length of the axial bore
Implementation Method 2
the outer circumference of the first roller is crowned, with a diameter of the first roller taken at a point along its axial length being greater than a diameter of the first roller taken at one axial end thereof
Implementation Method 3
the inner circumference of the roller comprises one or more of high-density polyethylene, nylon, polypropylene, polyvinyl chloride, or some combination thereof
Data Source
AI summary
A flow shelf roller having an outer circumference, a radially central hub, and an axially central bore forming an inner circumference through the central hub. The inner circumference of each roller has at least one axial relief channel formed therein along the length of the axial bore. In a more particular embodiment, the axial relief channel is formed including a non-perpendicular angle with respect to the inner circumference of the roller. In a more particular embodiment, the axial relief channel includes at least one of an angled chamfer and a radiused corner, adjacent to the inner circumference of the first roller. The disclosure also includes a roller flow shelf including a flow bed roller having any or all of the aforementioned characteristics.