Robotic pool cleaning vacuum with drive axle and free wheel
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Solution Overview
Problem
Existing robotic pool cleaners face limitations in handling ability, maneuverability, and suction capacity, particularly due to the presence of two motor brushes on lateral sides causing transverse imbalance and difficulty in maneuvering.
Innovation Solution
A robotic pool cleaning vacuum with a single drive axle supporting two drive wheels and a third free wheel, equipped with a non-return system and a large-diameter impeller, allowing for improved maneuverability and suction capacity, and featuring a delayed clutch mechanism for smooth direction changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If two motor brushes are mounted on lateral sides of the robot, then the robot can be propelled forward, but transverse imbalance and difficulty in maneuvering occur
Solution Approach 1:
The robot's drive system is segmented into two independent motor brushes that can rotate at different speeds and directions. This segmentation allows each brush to be controlled independently, enabling precise maneuverability while maintaining propulsion capability. The delayed clutch mechanism further segments the power transmission to each brush, allowing differential rotation for turning and positioning.
Solution Approach 2:
The robot employs dynamic control of the motor brushes through a delayed clutch mechanism that allows the rotation speed and direction of each brush to be dynamically adjusted. This dynamic capability enables the robot to maneuver effectively by varying the rotational characteristics of each brush according to operational needs, resolving the contradiction between propulsion and maneuverability.
2Ease of manufacture
If a single drive axle with two drive wheels is used, then manufacturing costs are reduced, but handling ability on variable surfaces deteriorates
Solution Approach 1:
The single drive axle system is enhanced with a delayed clutch mechanism that dynamically adjusts the power distribution to each drive wheel. This allows the robot to adapt to variable surfaces by independently controlling the rotation of each wheel, improving handling ability while maintaining the cost advantages of a single axle configuration.
Solution Approach 2:
The system changes the operational parameters of the drive wheels through the delayed clutch mechanism, allowing variation in rotation speed and torque distribution. This parameter adjustment capability enables the robot to handle different surface conditions effectively, resolving the contradiction between manufacturing simplicity and handling versatility.
3Ease of operation
If the motor inverts direction of rotation on contact with wall, then the robot can change direction, but the maneuvering becomes less fluid
Solution Approach 1:
Instead of abrupt motor inversion, the system uses dynamic control through the delayed clutch mechanism to gradually adjust the rotation of each motor brush. This dynamic approach allows for smoother direction changes by progressively altering the rotational characteristics rather than sudden reversals, improving maneuvering fluidity while maintaining direction control capability.
Solution Approach 2:
The delayed clutch mechanism performs preliminary action by gradually preparing the motor brushes for direction change before the actual reversal occurs. This preliminary adjustment of rotational parameters smooths the transition and reduces the abruptness of direction changes, resolving the contradiction between direction control and maneuvering smoothness.
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
Enhances maneuverability, stability, and suction efficiency, ensuring thorough pool cleaning with reduced manufacturing and maintenance costs, while minimizing energy consumption and prolonging battery life.
Implementation Method 1
a delayed clutch mechanism for smooth direction changes
Implementation Method 2
an impeller placed inside said duct to suck up debris via a suction port and push it into the filter bag
Implementation Method 3
a non-return system placed between the suction duct and the filter bag to prevent the debris pushed into said bag from falling back into said duct
Data Source
AI summary
A robotic pool cleaning vacuum, includes a chassis, a suction duct topping the frame and opening into a filter bag placed above, and an impeller placed inside the duct to suck up debris via a suction port and push it into the filter bag, the chassis including a motor axle drawing the robot, the axle includes two drive wheels driven by a single motor, and an axis connecting the drive wheels transversely to the movement of the robot, the motor being configured to invert its direction of rotation in contact with a wall, the robot further includes a third free wheel for greater stability and maneuverability.