Dishwasher Rack Mounting Assembly for Leak-Free Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The installation of upper rack assemblies in dishwasher appliances is complicated and prone to misalignment or leaks due to the need for multiple parts and the use of screw-mounted mounting brackets, which can compromise the integrity of plastic tubs.
Innovation Solution
A rack mounting assembly featuring a mounting body with a complementary alignment feature that engages with the tub's alignment feature, allowing for secure screw fixation without penetrating the tub, thus preventing leaks and simplifying the installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mounting brackets are used with multiple parts and screw mounting, then the upper rack assembly can be securely mounted, but the installation process becomes complicated and prone to misalignment
Solution Approach 1:
The mounting bracket is integrated as a single unit that combines alignment features and mounting functionality. The bracket includes an alignment tab that automatically engages with a recess in the tub, ensuring proper positioning while simplifying installation to a single screw fastening operation.
Solution Approach 2:
The alignment tab is pre-formed on the mounting bracket, creating a predetermined engagement path with the tub recess. This preliminary alignment feature ensures the bracket is correctly positioned before fastening, eliminating misalignment issues during installation.
2Reliability
If screws are passed through the tub for mounting, then secure attachment is achieved, but leaks may occur particularly in plastic tubs
Solution Approach 1:
The screw hole in the tub is designed as a blind hole that penetrates only partially through the tub wall, creating a localized attachment point. The mounting bracket includes a corresponding boss that engages with this blind hole, providing secure attachment while maintaining the integrity of the tub's water containment.
Solution Approach 2:
The screw hole is segmented into two parts: a first portion that receives the screw and a second portion that remains sealed. This segmentation allows the screw to penetrate only the necessary distance to secure the bracket while leaving the majority of the tub wall intact to prevent leaks.
3Reliability
If multiple mounting parts are used, then secure mounting is achieved, but the potential for misalignment or improper mounting increases
Solution Approach 1:
The alignment tab on the mounting bracket and the corresponding recess in the tub are designed with asymmetric geometries that provide a unique fit. The tab has a specific shape that only engages correctly with its matching recess, preventing improper installation and ensuring precise alignment.
Solution Approach 2:
The alignment tab acts as an intermediary feature between the mounting bracket and the tub. This intermediate element facilitates automatic alignment during installation, guiding the bracket into the correct position before the screw is fastened.
Data Source
AI summary
A rack mounting assembly for supporting an upper rack assembly within a tub of a dishwasher appliance is provided. The tub defines an alignment feature and a screw hole. The rack mounting assembly includes a mounting body defining a mounting boss and a complementary feature configured for engaging the alignment feature of the tub when the mounting body is properly aligned. When the mounting body is properly aligned, the mounting boss is substantially aligned with a screw hole in the tub such that a screw can pass through the mounting boss and into the screw hole to secure the mounting body to the tub.