Washer appliance having removable agitator post with locking features
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Solution Overview
Problem
Conventional washing machines with fixed agitators consume valuable space and user perception favors traditional post-type agitators, making it difficult to adopt water-conserving designs that use impellers, which may provide better cleaning performance, especially for larger loads.
Innovation Solution
A washing appliance with a removable agitator post that can be easily installed or removed without special tools, allowing for adjustable space utilization and effective cleaning, featuring an impeller with a receptacle for the agitator post and a shaft that moves between up and down positions for secure locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional post-type agitator is used, then user preference and perceived cleaning effectiveness are satisfied, but valuable space in the wash drum is consumed
Solution Approach 1:
The agitator post is made removable rather than fixed, allowing the system to dynamically adapt between two states: with agitator for user-preferred cleaning action, and without agitator for maximum space utilization. This resolves the contradiction by making the space-consuming component optional rather than permanent.
Solution Approach 2:
The agitator assembly is segmented into separable components (agitator post and receptacle) that can be independently positioned. This allows the system to segment the washing functions between impeller-driven water circulation and agitator-driven mechanical action, enabling space optimization when the agitator is not needed.
2Loss of substance
If water conservation measures are implemented with impeller designs, then water usage is reduced, but user acceptance may decrease due to lack of conventional agitator
Solution Approach 1:
The washing machine is designed with multi-functionality to serve both water-conservation mode (impeller only) and user-preferred mode (agitator + impeller). The removable agitator allows the same machine to adapt to different user needs and washing scenarios, maintaining broad acceptance while enabling water conservation.
Solution Approach 2:
The system allows parameter changes in cleaning approach by switching between agitator-based mechanical action and impeller-based water circulation. Users can select the appropriate cleaning parameter set depending on load size, article type, and water availability, with the removable agitator enabling this parameter switch.
3Adaptability or versatility
If a removable agitator design is implemented, then space flexibility is improved, but device complexity increases due to additional locking mechanisms
Solution Approach 1:
The locking mechanism is designed as self-latching rather than requiring external fastening tools or complex assembly procedures. The detent and cam mechanism automatically engages when the agitator is inserted and locked by simple user action, providing self-service functionality that minimizes operational complexity despite the added structural components.
Solution Approach 2:
The cam-actuated detent mechanism serves as an intermediary between user input and the locking function. Instead of directly engaging complex locking components, the cam provides a simple rotational motion that automatically triggers the detent engagement, simplifying the user interface while maintaining secure locking.
4Ease of operation
If the agitator is made removable without special tools, then ease of installation and removal is improved, but reliable locking during operation becomes more difficult to achieve
Solution Approach 1:
The cam mechanism acts as an intermediary that converts simple rotational user input into reliable mechanical locking through the detent engagement. This intermediary mechanism provides both ease of operation (simple rotation) and reliability (positive mechanical engagement that prevents accidental disengagement during vigorous washing).
Solution Approach 2:
The locking function is extracted as a separate, dedicated mechanism (detent and cam) rather than being integrated into the basic mounting structure. This extraction allows the locking system to be optimized independently for both ease of engagement and operational reliability, without compromising the simplicity of removal.
Data Source
AI summary
A washing appliance with an agitator post configured for removable positioning in a receptacle. An actuator is used to selectively control the position of a shaft to as to provide for releasably locking the agitator post into position. A detent is positioned at the receptacle and can be configured for removable receipt of the downward end of the shaft when the bottom end of the agitator post is positioned in the receptacle.