Removable Agitator Post Design for Washing Machine Versatility
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Solution Overview
Problem
Users of vertical axis washing machines face limited flexibility in choosing the type of agitation element for different washing operations, as existing models require a specific agitation element to be selected at the time of purchase, limiting the ability to handle various loads effectively.
Innovation Solution
A washing machine design that includes a removable agitation element with an extended post and impeller base, allowing users to switch between different agitation types without tools, featuring a mating collar and connector bar mechanism for secure attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a specific agitation element is selected at the time of purchase, then the machine can effectively handle certain washing loads, but the user loses flexibility to choose different agitation types for different washing operations
Solution Approach 1:
The agitation element is divided into separate components: an impeller base that remains in the machine and an extended post that can be removed and replaced. This segmentation allows users to swap different agitation types (impeller, single-action, dual-action) without replacing the entire agitation mechanism, thereby improving versatility while keeping the overall system manageable in complexity
Solution Approach 2:
The impeller base is designed as a universal mounting platform that can accommodate multiple types of agitation elements (impeller, single-action, dual-action). The standardized mounting interface with mating collar and recessed cup allows different agitation posts to be attached to the same base, enabling one machine to perform multiple agitation functions
2Adaptability or versatility
If a removable agitation element mechanism is implemented, then users can switch between different agitation types, but the attachment and detachment mechanism adds structural complexity
Solution Approach 1:
The attachment mechanism is segmented into discrete, simple components: a mating collar with internal threading or engagement features, a recessed cup mounting interface, and a connector bar. This segmentation allows each component to perform a specific function (attachment, positioning, connection) without requiring a complex integrated mechanism
Solution Approach 2:
The mating collar and recessed cup design enables users to attach and detach agitation elements without requiring tools or specialized skills. The self-contained engagement features (such as snap-fit or threaded connections) allow the mechanism to serve itself, securing the agitation post automatically when properly installed without additional fastening steps
3Volume of moving object
If an impeller agitation element is used, then a greater volume of the wash basket is available for bulky items, but users perceive less agitation and turnover compared to single-action or dual-action elements
Solution Approach 1:
The agitation system is segmented into a stationary impeller base that maximizes wash basket volume and a removable extended post that provides the agitation action. This allows the machine to maintain the space benefits of an impeller design while offering the option to attach single-action or dual-action posts when greater agitation is desired for specific loads
Solution Approach 2:
The agitation characteristics become dynamic and adjustable rather than fixed. Users can switch between different agitation element types (impeller for bulk handling, single-action for moderate agitation, dual-action for intense agitation) depending on the washing load requirements, making the system adaptable to different operational needs
Data Source
AI summary
A washing machine appliance or agitation element may include an impeller base and an extended post. The impeller base may include an impeller platform and a mounting face. The mounting face may define a recessed cup. The extended post may be removably attached to the impeller base to rotate therewith. The extended post may define an interior cavity. The extended post may include a mating collar and a connector bar. The mating collar may have a mating face disposed in selective engagement with the mounting face at the recessed cup. The connector bar may include an attachment piston slidably received within the interior cavity radially inward from the mating collar to move between a locked position and an unlocked position. The attachment piston may be in selective engagement with an inner surface of the mating collar at the locked position.