Dishwasher Basket Lifting Linkage for Stable High Elevation
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Solution Overview
Problem
Users have to kneel down or bend to load or unload lower baskets in dishwashers due to their proximity to the floor, and existing lifting devices for these baskets lack stability and high elevation capabilities, especially under heavy loads.
Innovation Solution
A lifting device with a guide apparatus, swivel arms, and a connecting element that couples the swivel movements of these arms to stabilize and enable a swivel angle greater than 90°, allowing for high elevation of the basket, preventing buckling under heavy loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lifting device uses simple swivel arms without positive coupling, then the device complexity is reduced, but the stability and reliability deteriorate under heavy loads causing buckling
Solution Approach 1:
The connecting element changes the geometric parameters and relative positions of the swivel arms during operation. By coupling the swivel movements through a connecting element, the system transforms the movement parameters of individual arms into a coordinated motion that prevents buckling while maintaining structural simplicity
Solution Approach 2:
The connecting element acts as an intermediary between the first and second swivel arms, mediating their movements. This intermediary component positively couples the swivel movements, ensuring that both arms move in a coordinated manner that maintains stability under heavy loads without requiring complex structural arrangements
2Length of moving object
If the swivel angle between arms and guide apparatus is limited to 90° or less, then the device complexity is reduced, but the elevation height of the holder deteriorates
Solution Approach 1:
The system transitions from a static 90° fixed angle to a dynamic swivel motion where the angle changes continuously during lifting. The guide apparatus enables the holder to swivel dynamically, achieving angles greater than 90° during operation, which increases elevation height without requiring complex additional mechanisms
Solution Approach 2:
The swivel angle parameter is changed from a fixed 90° limitation to a variable angle exceeding 90°. The guide apparatus and connecting element work together to enable this parameter change, allowing the holder to achieve higher elevation positions while maintaining guidance through the swivel motion
3Ease of operation
If the holder is positioned close to the floor for easy access, then the ease of operation is improved, but the user convenience deteriorates requiring kneeling or bending
Solution Approach 1:
The lifting device creates an equipotential effect by bringing the holder to an elevated position that is accessible without kneeling or bending. The guide apparatus and swivel arms work together to lift the holder to a height where the user can easily access items without physical strain, making the operation as convenient as accessing mid-level shelves
Data Source
AI summary
A lifting device for a holder for items to be washed in a dishwasher is configured to lift the holder for items to be washed from an initial position into an end position or lower it from the end position into the initial position. The lifting device includes a guide apparatus for guiding the holder in a horizontal direction. Arranged on the guide apparatus in a swivelable manner are a first swivel arm and a second swivel arm. A connecting element connects a first end section of the first swivel arm and a first end section of the second swivel arm, and is configured to couple a swivel movement of the first swivel arm and a swivel movement of the second swivel arm to one another in a positively driven manner.