Dishwasher Lower Rack Lift Linkage for Easier Loading
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Solution Overview
Problem
The existing dishwashers require users to bend or stoop when loading and unloading the lower rack, making it cumbersome, especially when handling larger items, as the rack is positioned near the bottom of the wash chamber.
Innovation Solution
A rack support system with a linkage system that allows the lower rack to be moved between a retracted and extended position, and further between a lowered and elevated position, using a lock-and-release mechanism to securely lock the rack in the elevated position for easier loading and unloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lower rack is positioned near the bottom of the wash chamber to maximize washing space, then the wash chamber capacity is improved, but the ease of operation deteriorates as users must bend or stoop to load and unload items
Solution Approach 1:
The lower rack is transformed from a static fixed-position rack to a dynamic movable rack that can be raised and lowered vertically. The rack includes a rack support system with a linkage mechanism that allows it to move between a lowered position (maximizing wash chamber capacity) and an elevated position (improving ease of loading and unloading). This dynamic positioning resolves the contradiction by allowing the rack to adapt its position based on operational needs.
Solution Approach 2:
The rack positioning problem is solved by adding a vertical dimension to the rack's movement capabilities. Instead of only horizontal movement in and out of the wash chamber, the rack now has vertical movement capability through the linkage system connected to the tub ceiling. This additional degree of freedom allows the rack to be elevated to an accessible height while maintaining the ability to be lowered for maximum washing space utilization.
Data Source
AI summary
A rack support system for a lower rack in a dishwasher is provided for a dishwasher having a wash chamber within a tub. The rack support system includes a frame configured to support the lower rack. A linkage system couples the frame to a side wall of the tub such that the lower rack is movable between a retracted position within the wash chamber and an extended position wherein the lower rack extends from the wash chamber. The lower rack is movable within a range between a lowered position and an elevated position with the lower rack extended from the wash chamber.