Pool Cleaner Drive Mechanism With Directional Dog Clutch
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Solution Overview
Problem
Automatic swimming pool cleaners often fail to move randomly over submerged surfaces, leading to incomplete cleaning and potential obstruction by obstacles, especially when not powered by turbine assemblies.
Innovation Solution
A two-wheel drive mechanism with a double-sided dog clutch and switching mechanism, powered by a fluid-driven turbine, allows for intermittent direction change of the rear wheel, enabling the cleaner to navigate around obstacles and maintain effective surface coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional single-wheel drive mechanism is used, then the structure is simple, but the cleaner cannot change direction and gets stuck in obstacles
Solution Approach 1:
The patent applies dynamics by making the drive mechanism adjustable and changeable during operation. The dog clutch mechanism allows the drive wheels to dynamically switch between forward and reverse rotation, enabling the cleaner to adapt its movement pattern in response to obstacles and surface variations, transforming a static single-wheel drive into a dynamic multi-directional system
Solution Approach 2:
The patent segments the single drive function into separate controllable components. By dividing the drive mechanism into independent drive wheels with individual clutch control, each wheel can be independently switched between forward and reverse rotation, allowing the cleaner to navigate obstacles through differential wheel rotation while maintaining overall system functionality
2Productivity
If the cleaner moves in a fixed pattern, then the mechanism is simple, but it does not adequately cover submerged surfaces
Solution Approach 1:
The patent implements periodic action through the intermittent engagement of the dog clutch mechanism. The clutch periodically switches the drive wheels between forward and reverse rotation, creating a rhythmic pattern of direction changes that enables the cleaner to systematically cover different areas of the pool surface over time, transforming fixed linear movement into periodic multi-directional coverage
Solution Approach 2:
The drive mechanism transitions from static fixed-pattern movement to dynamic adaptive movement. The ability to periodically reverse wheel rotation allows the cleaner to dynamically adjust its trajectory and coverage pattern, ensuring more complete surface coverage while maintaining relatively simple mechanical components
3Reliability
If the cleaner encounters obstacles, then it provides thorough cleaning potential, but it gets stopped and trapped
Solution Approach 1:
The patent applies preliminary anti-action by equipping the cleaner with the capability to detect and respond to obstacles before becoming trapped. The differential wheel rotation mechanism allows the cleaner to proactively adjust its path by reversing one or both wheels when encountering resistance, preventing entrapment before it occurs and maintaining continuous operation
Solution Approach 2:
The cleaner transitions from rigid fixed-direction movement to dynamic obstacle-responsive movement. The ability to independently control wheel rotation direction enables real-time adaptation to obstacles, allowing the cleaner to navigate around barriers while maintaining cleaning effectiveness and operational continuity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism ensures comprehensive cleaning of submerged surfaces by allowing the cleaner to change direction and avoid obstacles, ensuring thorough coverage and efficient debris passage, even when not powered by a turbine assembly.
Implementation Method 1
These cleaners are frequently driven by mechanisms which utilize the power derived from water flow arising in the filter plants used to maintain clarity of the pool water. These power supply sources are commonly provided as turbine assemblies driven by a swimming pool filtration pump.
Implementation Method 2
a cam follower engaged with a cam formation carried on an independently supported control gear in mesh with a worm gear on the lay shaft
Data Source
AI summary
The invention relates to a pool cleaner. Rotation from a turbine is transmitted to a first wheel that is forwardly driven. A second wheel is switched between corresponding forward rotation and rearward rotation. An axle of the first wheel rotatably supports a sleeve that carries the second wheel. The reverse transmission is effected by a double-sided dog clutch member slidably supported between a pair of clutch gears freely rotatable on a rotating lay shaft. A first clutch gear is connected for reverse rotation and a second clutch gear for forward rotation of the sleeve. A switching mechanism includes a movably mounted lever arm engaging the double-sided clutch member with a cam follower engaging a cam formation carried on an independently supported control gear connected to the turbine and in mesh with a worm gear on the lay shaft.