Dual-Motor Snow Thrower Drive Control for Zero-Radius Turning
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Solution Overview
Problem
Existing snow throwers have a large turning radius and struggle to achieve zero-radius turns, making them difficult to maneuver in tight spaces.
Innovation Solution
A hand-propelled snow thrower with a traveling assembly featuring two electric motors and wheels, and an operating assembly with adjustable speed controls, where a controller manages the motor speeds based on operator input to enable precise turning and maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor drives both wheels through a differential mechanism, then the structure is simple, but the turning radius is large and zero-radius turns cannot be achieved
Solution Approach 1:
The patent divides the drive system into two independent motor-wheel units, with each wheel having its own motor. This segmentation allows independent control of each wheel's rotation speed and direction, enabling zero-radius turns and improved maneuverability while maintaining relatively simple overall structure
2Ease of operation
If independent motors are used for each wheel, then zero-radius turns and maneuverability are improved, but the device complexity increases
Solution Approach 1:
The drive system is segmented into independent motor-wheel units, where each wheel has its own motor. This allows independent speed and direction control of each wheel, achieving zero-radius turns and superior maneuverability. The modular design keeps each unit relatively simple despite the overall system having two motors
3Device complexity
If traditional speed regulation is used, then the control system is simple, but the speed adjustment precision is low
Solution Approach 1:
The patent incorporates feedback mechanisms in the control system that detect the operational state of operating members and use this information to precisely control the rotational speed of each motor. This feedback-based control enables accurate speed regulation and precise maneuvering while maintaining a relatively straightforward control architecture
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 allows for improved maneuverability and the ability to make zero-radius turns, enhancing the operator's control over the snow thrower, especially in confined areas.
Implementation Method 1
a first electric motor for driving the first traveling wheel, a second electric motor for driving the second traveling wheel
Data Source
AI summary
A hand-propelled machine includes a frame, a traveling assembly, an operating assembly, and a controller. The controller is configured to control the rotational speed of a first electric motor and the rotational speed of a second electric motor based on the state of a first operating member and the state of a second operating member. The controller is further configured to, when the first operating member is operated to a preset position and the second operating member is not operated, control the first electric motor to reverse at a preset rotational speed.