Dual drive floor scrubber
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Solution Overview
Problem
Current floor cleaning and burnishing machines, especially battery-powered ride-on models, are difficult to maneuver in tight spaces and around obstacles, requiring two controls and causing operator fatigue, with limited precision in speed and steering control.
Innovation Solution
A floor cleaning or burnishing machine equipped with an analog joystick connected to individual right and left potentiometers and motor controllers, allowing independent control of rotational speed and direction of rear steering drive wheels, enabling precise movement and navigation with single-hand operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional steering wheel or handle bar control is used, then the machine can be steered, but the operator experiences fatigue and difficulty maneuvering in tight spaces
Solution Approach 1:
The patent replaces traditional mechanical steering systems (steering wheel or handle bar connected to front wheels) with an electric joystick control system that independently controls the speed and direction of left and right drive wheels through electronic signals, eliminating the need for mechanical steering linkage
Solution Approach 2:
The patent divides the drive system into independently controlled left and right drive wheels, each with its own motor controller, allowing separate control of each wheel's speed and direction through the joystick, enabling precise maneuvering without traditional mechanical steering
2Ease of operation
If foot-operated throttle and separate steering control are used, then speed and direction can be controlled, but the operator needs two hands and experiences fatigue
Solution Approach 1:
The patent merges the functions of acceleration, deceleration, steering, and direction control into a single joystick control mechanism, allowing the operator to control all aspects of machine movement with one hand, eliminating the need for separate throttle and steering controls
Solution Approach 2:
The patent replaces the mechanical foot-operated throttle and hand-operated steering system with an electric joystick control system that uses electronic sensors and motor controllers to achieve the same functions with simplified one-hand operation
3Measurement precision
If open-ended or wig-wag speed control is used, then the machine can move forward and reverse, but precise speed control is limited
Solution Approach 1:
The patent incorporates feedback mechanisms through electronic sensors in the joystick control system that continuously monitor the position and movement of the control lever, providing real-time feedback to the motor controllers to enable precise and proportional control of wheel speed and direction
Solution Approach 2:
The patent transitions from static discrete speed control (open-ended or wig-wag) to dynamic continuous speed control through the joystick, which allows smooth, variable, and proportional adjustment of motor speed based on the control lever's position, enabling precise speed modulation
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 solution enhances maneuverability and reduces operator fatigue by allowing precise control of speed and steering with a single hand, improving navigation in tight areas and reducing cleaning chemical costs.
Implementation Method 1
analog joystick, individual right and left potentiometers
Data Source
AI summary
A floor cleaning or burnishing machine has at least one motor controller that is electrically connected to an analog joystick control, right and left potentiometers, an electrical power source, and right and left electrical drive motors. The right motor is mechanically connected to a right rear steering drive wheel and the left motor is mechanically connected to a left rear steering drive wheel. Rotational speed and direction of each rear wheel is independently controlled, by way of the joystick in cooperation with respective potentiometers, in either a forward or reverse direction. At any given time, each potentiometer controls a respective motor controller which individually controls the rotational speed and direction of a respective wheel, thereby each wheel is capable of rotating in an opposite direction at a different speed to the other wheel. To slow the floor cleaning or burnishing machine down, regenerative braking is utilized by operating the motors as generators.