Floating-Body Actuation Mechanism for Knock-Resistant Motion Transfer
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Solution Overview
Problem
Actuation devices used in harsh conditions, such as those experienced by washing agent dispensers in dishwashers, are prone to errors due to violent knocks, shakes, and vibrations, which can cause unintended movements of the floating body, leading to inaccuracies in the operating cycle.
Innovation Solution
The actuation device incorporates a floating body that moves between specifically designed seats on the driving and driven members, with constraint projections and recesses that guide and maintain the floating body's position, ensuring controlled movements and preventing accidental displacements, even under harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a floating body is used to transfer movement between driving and driven members, then the device achieves compactness and reliability under normal conditions, but the floating body becomes susceptible to accidental movements under harsh conditions with knocks and vibrations
Solution Approach 1:
The floating body is divided into multiple segments (first floating body portion and second floating body portion) that can move independently relative to each other. This segmentation allows each portion to be constrained separately by corresponding seats, reducing the impact of external shocks on the overall operation and preventing accidental movements while maintaining the compact floating body mechanism.
2Adaptability or versatility
If the floating body is allowed to move freely between seats to enable selective strokes, then the device achieves operational flexibility, but the floating body becomes vulnerable to unintended movements under external impacts
Solution Approach 1:
Different portions of the floating body are provided with different local characteristics - the first floating body portion interacts with the first seat while the second floating body portion interacts with the second seat. This local differentiation allows each portion to be optimized for its specific function, maintaining operational flexibility while enhancing resistance to external impacts through localized constraint mechanisms.
Data Source
AI summary
An actuation device includes a driving member, a driven member and an actuating arrangement operable for producing a movement of the driving member. The driven member has a seat into which is operatively inserted, with the possibility of relative movement, an engagement part of the driving member. The driving member has a seat which, in at least one position of the actuation device, at least partially faces the seat of the driven member. The two seats are longitudinally extended and the actuation device further includes at least one floating body, capable of moving between the two seats when they face each other at least in part. The driving member and the driven member are configured for preventing accidental or irregular displacements of the floating body, particularly accidental or irregular displacements due to knocks, vibrations and similar mechanical stresses.