Electric Riding Mower Layout for Low-Noise Steering Visibility
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Solution Overview
Problem
Conventional riding mowing devices, such as lawn tractors, face issues with noise pollution, high maintenance costs due to frequent fuel system part replacements, and poor maneuverability due to heavy fuel engines and large front covers, which create blind spots and increase steering difficulty.
Innovation Solution
A riding mowing device design featuring a power supply assembly with battery packs, a control circuit board positioned between the seat and power supply, and a traveling assembly with a load ratio less than or equal to 1, allowing for improved steering and reduced blind spots, along with a grass collecting system for efficient grass management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a fuel engine is used to power the lawn tractor, then sufficient power is provided, but noise pollution increases and maintenance costs rise due to frequent fuel system part replacements
Solution Approach 1:
The patent replaces the fuel engine (mechanical combustion system) with an electric motor powered by a battery pack. This substitution eliminates the combustion process that generates noise and harmful emissions, while providing sufficient power through the electric motor to drive the cutting assembly and traveling mechanisms.
Solution Approach 2:
The patent changes the energy source from chemical energy (fuel) to electrical energy (battery). This parameter change fundamentally alters the operation characteristics, eliminating noise pollution and reducing maintenance requirements while maintaining adequate power output for lawn mowing operations.
2Power
If a fuel engine is used, then power is sufficient, but maintenance costs increase due to frequent replacement of fuel system wearing parts
Solution Approach 1:
The patent replaces the complex fuel engine system with a simpler electric motor and battery system. The electric motor has fewer moving parts, no fuel injection system, no spark plugs, and no exhaust components, dramatically reducing maintenance requirements and costs while maintaining sufficient power for operation.
3Strength
If a large front cover is used to cover the fuel engine, then the engine is protected, but the front blind spot increases and steering becomes more laborious
Solution Approach 1:
The patent replaces the large fuel engine with a more compact electric motor and battery arrangement. This substitution allows for a reduced front cover size that provides adequate protection while minimizing the front blind spot and reducing steering effort, as the lighter and smaller power train requires less force to maneuver.
4Power
If a fuel engine is used, then power is sufficient, but the front cover height increases creating a larger front blind spot
Solution Approach 1:
The patent replaces the vertically-oriented fuel engine with a horizontally-oriented electric motor and battery configuration. This substitution reduces the vertical height requirement of the front cover while maintaining sufficient power output, thereby reducing the front blind spot and improving operator visibility.
Data Source
AI summary
A riding mowing device includes a seat used for a user to sit on and including a seat cushion and a backrest; a frame for supporting the seat; a cutting assembly including a cutting deck and a mowing element for mowing grass, where the mowing element is at least partially accommodated in the cutting deck, and the cutting assembly is mounted to the frame; a traveling assembly for driving the riding mowing device to travel; a control circuit board for controlling at least the cutting assembly and the traveling assembly; and a power supply assembly for supplying power to at least the cutting assembly and the traveling assembly. At least part of the control circuit board is disposed between the seat and the power supply assembly.