Roller assembly
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Solution Overview
Problem
Conventional roller assembly structures experience excessive friction between the roller surface and external contact surfaces, making it difficult for rollers to roll smoothly, especially when bearing weight, which hinders ease of use.
Innovation Solution
A roller structure with an axial hole and axle portion, featuring a sleeve with a fitting portion and blocking portions coated or mounted with substances like Teflon, oil, or lubricants to reduce friction, allowing the roller to rotate freely between these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional roller assembly structures are used, then the roller can support the weight of the moving object, but the friction between the roller surface and external contact surfaces is excessively great, making it difficult for the roller to roll smoothly
Solution Approach 1:
The patent introduces a substance conducive to reduction of friction (such as lubricant, Teflon coating, or other low-friction material) as an intermediary layer between the roller and the sleeve. This intermediary substance reduces the direct contact friction between the roller surface and the sleeve inner wall, allowing the roller to rotate more easily while still supporting the load.
Solution Approach 2:
The patent changes the surface properties of the roller-sleeve interface by applying a substance that alters the friction parameter. This substance modifies the coefficient of friction between the contacting surfaces, transforming the high-friction conventional interface into a low-friction interface that enables smooth rolling motion.
2Productivity
If conventional roller structures are used, then the structure is simple, but the rolling friction is excessively great to the detriment of the rolling
Solution Approach 1:
The friction-reducing substance acts as a mediator between the roller and sleeve, enabling more efficient rolling motion. This intermediary layer reduces energy loss to friction, thereby improving rolling efficiency and productivity without requiring complex structural modifications.
Solution Approach 2:
The patent replaces the purely mechanical contact interface with a chemically modified interface by applying a friction-reducing substance. This substitution changes the nature of the interaction from direct solid-to-solid contact to a contact mediated by a low-friction material, thereby improving rolling efficiency.
3Ease of operation
If friction-reducing substances are applied to the roller or sleeve, then rolling friction is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The friction-reducing substance is applied during the manufacturing process, before the roller is put into service. This preliminary action ensures that the low-friction coating is already in place when the roller begins operation, eliminating the need for separate application steps and simplifying the overall manufacturing workflow.
Solution Approach 2:
The friction-reducing substance is applied locally to specific surfaces that require friction reduction, such as the roller outer surface or the sleeve inner wall. This localized application focuses the manufacturing effort only where needed, rather than requiring treatment of entire components, thereby minimizing the increase in manufacturing complexity.
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
The solution significantly reduces rolling friction, enabling the roller to move easily and enhance usability by minimizing contact friction between the roller and its sleeve, even when bearing weight.
Implementation Method 1
one of the axle portion, the axial hole and the first blocking portion has a substance conducive to reduction of friction between the roller and the sleeve
Data Source
AI summary
A roller assembly includes a roller having an axial hole and an axle portion disposed in the axial hole to allow the roller to rotate about the axle portion; a sleeve with a first end disposed at a first end of the axle portion and a second end having a fitting portion, the fitting portion being fitted to a carried object, the sleeve has a first blocking portion positioned proximate to a first side of the roller to allow the roller to rotate between the first blocking portion and the fitting portion, wherein one of the axle portion, the axial hole and the first blocking portion has a substance conducive to reduction of friction between the roller and the sleeve.