Washer appliance having removable agitator post with radial 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 newer, more efficient designs that use less water and space, such as rotatable impellers, due to the perceived need for increased fluid levels and agitator action for effective cleaning.
Innovation Solution
A washing appliance with a removable agitator post that can be easily installed or removed without special tools, allowing for adjustable space and effective cleaning, featuring a rotatable shaft with movable tabs that lock or unlock the agitator post into a receptacle for rotation, enabling user preference and space optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional post-type agitator is used, then effective cleaning is achieved, 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 adjust between having the agitator (for effective cleaning) and removing it (for maximum space). This transforms a static space-consuming component into a flexible solution that can be deployed only when needed.
Solution Approach 2:
The agitator assembly is divided into separable components (agitator post and receptacle) that can be independently positioned. The receptacle remains fixed to provide structural support, while the agitator post can be removed when not needed, segmenting the space-consuming element from the essential functional elements.
2Ease of operation
If a conventional fixed agitator is used, then user preference is satisfied, but adaptability to different washing needs is reduced
Solution Approach 1:
The system transitions from a static fixed agitator to a dynamic removable agitator, enabling users to adapt the washing machine to different needs. Users can remove the agitator for large loads requiring more space while maintaining the option to use it for smaller loads where effective cleaning is prioritized.
Solution Approach 2:
The system allows changing the operational parameter of having or not having an agitator present. This binary state change enables adaptation between different washing scenarios without requiring multiple specialized agitators, simply by removing or retaining the single agitator post.
3Adaptability or versatility
If a removable agitator design is implemented, then space flexibility is improved, but device complexity increases
Solution Approach 1:
The removable mechanism uses simple dynamic elements (movable tabs that engage with openings) rather than complex locking systems. The tabs naturally engage with the receptacle openings during insertion and can be easily disengaged by lateral movement, providing removability without requiring tools or complex mechanisms.
Solution Approach 2:
The agitator post design allows users to install and remove it without requiring special tools or technical expertise. The movable tabs self-align with the openings during insertion and can be easily manipulated by hand, making the removable feature user-friendly rather than adding operational complexity.
4Loss of substance
If an impeller without agitator post is used, then water efficiency is improved, but user acceptance decreases
Solution Approach 1:
The system allows dynamic selection between impeller-only operation (for water efficiency) and impeller-with-agitator operation (for user acceptance and enhanced cleaning). Users can choose to install the agitator post when they prefer traditional cleaning action, while the impeller continues to provide water-efficient operation when the agitator is removed.
Solution Approach 2:
The receptacle serves multiple functions: it provides structural support for the impeller, offers a mounting interface for the optional agitator post, and can be used independently without the agitator. This multi-functionality allows the system to accommodate both water-efficient impeller-only operation and user-preferred agitator operation within a single universal design.
Data Source
AI summary
A washing appliance with an agitator post configured for removable positioning in a receptacle. A shaft may be supported by the agitator post, the shaft rotatable relative to the agitator post. A plurality of movable tabs may be positioned at the bottom end of the agitator post and in mechanical communication with the shaft such that a direction of rotation of the shaft causes the plurality of movable tabs to be selectively movable along a radial direction between an extended position in contact with the receptacle that prevents rotation of the agitator post relative to the receptacle and a retracted position that allows rotation of the agitator post relative to the receptacle.