Pull-Out Refrigerator Container Using Roller and Slide Bearing
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Solution Overview
Problem
Existing refrigeration devices lack an efficient and cost-effective means to easily pull out or push in refrigerated goods containers, often relying on expensive telescopically extendable metal loops or sliding adjustments, which can be cumbersome and require significant effort.
Innovation Solution
The implementation of a bearing system combining rolling and sliding friction using rotatable rollers on the inner container and plain bearing points on the refrigerated goods container, allowing for easy pull-out or push-in with minimal effort, utilizing thermoplastic materials for optimal sliding friction coefficients and incorporating additional guide rails to prevent tilting and ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If telescopically extendable metal slides are used for pull-out storage, then the structural strength and stability are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces expensive metal slide mechanisms with simple plastic rollers and guide rails that are cheaper to manufacture and easier to assemble, while providing sufficient functionality for the application
Solution Approach 2:
The patent extracts the essential function of support and guidance from complex metal slides, separating the load-bearing function (handled by the container structure itself) from the rolling guidance function (handled by simple rollers on guide rails)
2Device complexity
If traditional sliding adjustments are used for pull-out storage, then the device complexity is reduced, but the ease of operation deteriorates due to significant effort required
Solution Approach 1:
The patent uses cylindrical rollers instead of flat sliding surfaces, converting sliding friction into rolling friction which significantly reduces the force required for pull-out operations while maintaining structural simplicity
Solution Approach 2:
The patent changes the friction parameter by introducing rolling elements, transforming the interaction from high-friction sliding contact to low-friction rolling contact, thereby improving ease of operation without complicating the device
3Ease of operation
If rollers are added to reduce friction, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent divides the support function into multiple simple rollers distributed along the guide rails, with each roller handling a portion of the load independently, making the system easier to manufacture and assemble while maintaining low friction
Solution Approach 2:
The rollers serve multiple functions simultaneously: they support the container weight, enable smooth pull-out motion, and guide the container along the rails, eliminating the need for separate mechanisms for each 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 solution enables the refrigerated goods container to be easily and efficiently pulled out or pushed in with reduced effort, utilizing a combination of rolling and sliding friction, while preventing tilting and ensuring smooth operation, thus enhancing user convenience and reducing operational costs compared to existing technologies.
Implementation Method 1
The inner container has two rollers (8a, 8b) which roll along a counter-running surface (9a, 9b) on the refrigerated container in the extension direction
Implementation Method 2
The refrigerated container can be easily pulled out of or pushed into the inner container by means of a cost-effective storage device utilizing a combination of rolling and sliding friction
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a refrigerator, in particular a domestic refrigerator, having an inner container (2) with a front opening (4), which can be closed by a door leaf, for the removal and/or insertion of refrigeration articles, and a pull-out refrigeration article container (3), as well as mounting means (5) for mounting the refrigeration article container (3) in the inner container (2) in a pull-out manner, the mounting means (5) having at least one roller (8a, 8b) which is disposed in a front region of the inner container (2) and on which a counter bearing face (9a, 9b) of the refrigeration article container (3) rolls in the pull-out direction, and at least one counter bearing point (6a, 6b) which is disposed in a rear region of the refrigeration article container (3) and is supported on a counter slide bearing face (7a, 7b) on the inner container (2).