Dishwasher Rack Trim Assembly With Adjustable Length Tolerance Fit

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Solution Overview

Problem

Domestic dishwashers face challenges in accommodating dimensional variations of wire frame racks, leading to issues with trim assembly fitting and stability during dish washing.

Innovation Solution

A rack assembly with a wire frame and a trim assembly that includes tolerance adjusters to adjust the effective length of the trim elements, ensuring compatibility with varying rack dimensions by overlapping the adjusters with the trim elements, allowing for flexible fitting and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed-length trim assembly is used on wire frame racks, then the manufacturing and assembly process is simple, but the trim assembly cannot accommodate dimensional variations in the rack, leading to poor fitting and instability

Engineering Contradiction:
Improveaccommodation of dimensional variationsVSAvoidtrim assembly structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The trim assembly incorporates adjustable components that allow the effective length to be modified. The trim assembly can be adjusted to different lengths to match the actual dimensions of the wire frame rack, transforming a static structure into a dynamic one that adapts to dimensional variations.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the length parameter of the trim assembly by providing adjustable components. The effective length of the trim assembly can be modified to correspond with the actual length of the wire frame rack, allowing the same trim assembly design to accommodate different rack dimensions within a specified range.

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If custom-sized trim assemblies are manufactured for each rack dimension, then perfect fitting is achieved, but manufacturing complexity and cost increase significantly

Engineering Contradiction:
Improvefitting accuracyVSAvoidmanufacturing process
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The trim assembly is designed as a universal component that can fit multiple rack sizes. By incorporating adjustable mechanisms, a single trim assembly design serves multiple functions across different rack dimensions, eliminating the need to manufacture separate trim assemblies for each specific size.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The adjustable nature of the trim assembly allows it to adapt to different rack dimensions without requiring custom manufacturing. The dynamic adjustment capability enables one standardized trim assembly design to achieve precise fitting across various rack sizes.

Inventive Principle:
Principle #15Dynamics

3Stability of the object's composition

If the trim assembly is made rigid to ensure stability, then structural strength is improved, but the ability to compensate for dimensional variations is reduced

Engineering Contradiction:
Improvetrim assembly stabilityVSAvoidadjustment capability
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The trim assembly incorporates adjustable components that allow modification of the effective length while maintaining structural integrity. The adjustable mechanisms are designed to provide both stability during operation and the capability to adapt to different rack dimensions.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The trim assembly is divided into multiple segments or components, some of which are adjustable. This segmentation allows specific portions to be modified in length while other portions maintain rigid structural support, achieving both adaptability and stability simultaneously.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS9113773B2Dishwasher rack assembly with trim assembly
Publication Date: 2015.08.25 WHIRLPOOL CORP
  • US9113773B2 patent drawing
  • US9113773B2 patent drawing
  • US9113773B2 patent drawing

AI summary

A rack assembly for supporting dishes in a dishwasher may comprise a wire frame rack having a plurality of wire elements and a trim assembly having at least one trim element and at least one tolerance adjuster mounted to the wire frame rack. The at least one trim element and the at least one tolerance adjuster may cooperate to alter the effective length of the trim assembly.