Refrigerator Drawer Anti-Racking Cross Bar for Alignment Stability

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Solution Overview

Problem

Conventional pull-out drawers in consumer appliances, such as refrigerators, are prone to misalignment and 'racking' due to off-center pulling forces, which can lead to binding and improper sealing, and existing anti-racking systems like gear and cross shaft assemblies reduce usable compartment space.

Innovation Solution

An anti-racking system that includes a cross bar connected to slide brackets and a bottom slide assembly, allowing for linear adjustability, which supports the pull-out drawer and reduces the load on side slide assemblies, thereby minimizing racking while maintaining compartment space.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a gear and cross shaft assembly is used to synchronize sliding movement of opposite slide mechanisms, then racking of the drawer is minimized, but the usable volume of the compartment is reduced

Engineering Contradiction:

Improvedrawer alignmentVSAvoidcompartment volume

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent removes the cross shaft component from the anti-racking system, extracting only the essential function of synchronizing slide mechanisms. The gear assemblies on opposite sides independently engage with stationary gear rails, achieving synchronized movement without requiring a physical cross shaft to span the drawer width, thereby preserving compartment volume.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system divides the anti-racking function into independent gear assemblies on each side of the drawer. Each gear assembly operates independently but achieves synchronized motion through engagement with stationary gear rails, eliminating the need for a connecting cross shaft and freeing up compartment space.

Inventive Principle:

Principle #1Segmentation

2Volume of stationary object

If conventional slide mechanisms are used without anti-racking features, then the compartment space is maximized, but the drawer becomes susceptible to misalignment and binding

Engineering Contradiction:

Improvecompartment volumeVSAvoiddrawer alignment

Core Design Contradiction:

Volume of stationary objectVSReliability

Solution Approach 1:

The patent replaces complex mechanical anti-racking systems (cross shafts and connecting linkages) with a simplified gear-rail mechanism. The stationary gear rails provide guidance and synchronization through gear engagement alone, eliminating the need for moving cross shafts and reducing spatial requirements while maintaining alignment reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS8931863B2Consumer appliance drawer with improved anti-racking system

Publication Date: 2015.01.13 HAIER US APPLIANCE SOLUTIONS INC

AI summary

A consumer appliance, such as a refrigerator, includes a compartment having opposite sides and a bottom wall. A pull-out drawer is configured above the bottom wall of the compartment. A slide assembly is configured on each opposite side of the compartment and includes a base mounted to the compartment and a slide member linearly moveable along the base. The pull-out drawer has a slide bracket mounted to each respective slide member for movement of the drawer into and out of the compartment. A bottom slide assembly has a slide member and a base mounted on the bottom wall of the compartment. A cross bar is connected to and spans between the slide brackets below the pull-out drawer and is connected to the slide member of the bottom slide assembly.