Washing machine appliance having a removable agitator
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Solution Overview
Problem
Users of vertical axis washing machines face limited flexibility in choosing agitation elements for different washing operations, as existing agitation elements are typically fixed and require tool-based removal or identification, restricting the ability to switch between types during discrete washing cycles.
Innovation Solution
A washing machine design featuring a rotatably mounted impeller base with an extended post and connector bar system, allowing for easy removal and secure reattachment of agitation elements without tools, and providing a visual or tactile indication of proper installation through a connector bar mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed agitation element is used in the washing machine, then the structure is simple and reliable, but the user cannot switch between different agitation elements for different washing operations
Solution Approach 1:
The agitation element is divided into separate components: an impeller base that remains fixed in the basket and an extended post that can be removed and replaced. This segmentation allows users to switch between different agitation element types while maintaining a simple overall structure.
Solution Approach 2:
The mounting structure transitions from a fixed, permanent attachment to a dynamic, removable connection. The extended post can be easily detached from and reattached to the impeller base, enabling adaptability while keeping the mounting mechanism simple through features like threaded connections or snap-fit designs.
2Adaptability or versatility
If a removable agitation element design is implemented, then the user can switch between different agitation elements, but the mounting structure becomes more complex
Solution Approach 1:
The mounting and removal mechanism is designed to be user-friendly and tool-free. Features such as hand-tightening threaded connections, snap-fit mechanisms, or bayonet-style attachments enable users to easily install and remove agitation elements without requiring specialized tools or complex procedures.
Solution Approach 2:
The mounting structure uses simple, reversible connection mechanisms that provide secure attachment during operation but allow easy removal when needed. This dynamic design balances the need for stability during washing with the need for ease of replacement.
3Reliability
If no identification system is provided, then the device is simpler, but the user cannot identify when the agitation element is properly installed
Solution Approach 1:
Visual indicators such as colored rings, marked alignment features, or color-coded components are incorporated into the mounting structure. When the agitation element is properly installed, these visual indicators provide clear feedback to the user, ensuring correct installation without adding mechanical complexity.
Solution Approach 2:
The mounting structure includes built-in feedback mechanisms that provide tactile or visual confirmation of proper installation. This may involve alignment marks that line up, clicks that indicate correct positioning, or visual indicators that show when the agitation element is securely attached.
Data Source
AI summary
A washing machine appliance may include a tub, a basket, an impeller base, and an extended post. The impeller base may include one or impeller fins and a mounting face. The mounting face may include a threaded bracket defining a mounting thread extending about a rotation axis. The mounting face may define a vertical slot radially inward from the mounting thread. The extended post may be removably attached to the impeller base to rotate therewith. The extended post may include a base body, an auger fin, and a mating face. The base body may extend between a bottom end and a top end. The auger fin may extend radially from the base body. The mating face may be disposed on the bottom end. The mating face may define a mating thread matched to the mounting thread to rotatably enmesh therewith.