Eccentric Expandable Roller Cover Retaining Ring
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Solution Overview
Problem
Covered rollers in demanding environments face issues with short outer surface lifespan due to corrosion and wear, requiring frequent re-covering and repair, which is time-consuming, costly, and poses health and safety risks due to their large and heavy size, necessitating extensive machinery and personnel for removal and reinstallation.
Innovation Solution
A roller assembly featuring an inner wheel base and an expandable outer ring with adjustable circumference, allowing for easy mounting and dismounting of the roller cover without removing the assembly from the production machine, reducing machine downtime and the need for extensive spare parts and transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the roller is made large and heavy to withstand high loads and severe environments, then the roller can endure demanding operating conditions, but the removal and installation require extensive lifting machinery and personnel, increasing health and safety risks and machine downtime
Solution Approach 1:
The roller is divided into three main segments: the inner wheel base, the expandable outer ring, and the roller cover. This segmentation allows the roller cover to be independently replaced without moving the heavy inner wheel base, significantly easing the removal and installation process while maintaining the roller's ability to withstand demanding environments.
Solution Approach 2:
The outer ring is designed to be expandable and adjustable in circumference. During installation, the outer ring can be contracted to a smaller circumference to facilitate mounting of the roller cover, then expanded to its operational circumference to secure the cover firmly. This dynamic adjustment capability simplifies installation while ensuring secure attachment during operation.
2Strength
If the roller is made large and heavy, then it can handle high loads, but the transportation cost is high and extensive machinery is required for removal and reinstallation
Solution Approach 1:
By segmenting the roller into the heavy inner wheel base and the lighter roller cover, the invention allows only the cover to be transported and replaced. The heavy base remains installed on the production machine, eliminating the need for heavy lifting machinery during routine maintenance and significantly reducing transportation requirements.
Solution Approach 2:
The expandable outer ring with adjustable circumference enables the roller cover to be mounted and removed without complex installation machinery. The ring can be manually adjusted to accommodate the cover during installation, then expanded to secure it, eliminating the need for heavy-duty installation equipment.
3Ease of repair
If the outer surface of the roller is recovered by re-covering or re-grinding, then the roller can be restored, but the procedure is time-consuming and requires the roller to be dismantled and transported
Solution Approach 1:
The roller cover is designed as a separate, replaceable component that can be quickly swapped without dismantling the heavy inner wheel base. This segmentation enables rapid replacement of worn covers on-site, eliminating the need for time-consuming transportation to external facilities and significantly reducing machine downtime.
Solution Approach 2:
The expandable outer ring allows the roller cover to be quickly installed by contracting the ring, mounting the cover, then expanding the ring to secure it. This dynamic mechanism enables rapid in-situ replacement of covers, eliminating the need for lengthy transportation and external repair processes.
4Duration of action of stationary object
If the roller is made large and heavy, then it can withstand prolonged use and stresses, but the lead time between removing and returning the re-covered roller is high, requiring investment in spare rollers
Solution Approach 1:
By making the roller cover a separate, quickly replaceable component, the invention enables rapid replacement during scheduled maintenance without the lengthy lead times associated with re-grinding or external re-covering. This reduces the need for extensive spare roller inventory while maintaining continuous operation.
Solution Approach 2:
The expandable outer ring mechanism enables rapid in-situ replacement of roller covers, dramatically reducing the lead time between removal and reinstallation. This dynamic installation capability allows covers to be replaced during brief maintenance windows, eliminating the need for weeks-long lead times and reducing spare roller requirements.
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 solution minimizes machine downtime, reduces the need for extensive spare parts and personnel, lowers transportation costs, and enhances safety by allowing for quick and lightweight roller cover changes, thereby reducing the capital tied up in spare stock and environmental impact.
Implementation Method 1
an expandable outer ring which co-operatively connectable to said inner wheel base, whereby the circumference of said expandable outer ring is adjustable
Implementation Method 2
the outer surface of the expandable outer ring is eccentric with inner rim of the expandable outer ring, such that said outer surface is concentric with the driving axle when said expandable outer ring is adjusted to secure the outer roller cover
Data Source
AI summary
A roller assembly for a production machine having an inner wheel base capable of attachment to the driving axle of a production machine and an expandable outer ring which is cooperatively connectable to the inner wheel base is disclosed. The circumference of the expandable outer ring is adjustable. An outer roller cover mounts circumferentially around the adjustable expandable outer ring.