Battery Powered Riding Lawn Mower Weight Distribution
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Solution Overview
Problem
Riding lawn mowers powered by gas-fueled combustion engines are inefficient, costly to maintain, noisy, and produce emissions, while existing electric solutions face challenges in balancing weight and traction.
Innovation Solution
A battery-powered riding lawn mower with a distributed battery system powering both the drive motor and cutting deck, featuring an articulated frame for balanced weight distribution and efficient operation, eliminating the need for gasoline engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas-fueled combustion engines are used to power riding lawn mowers, then sufficient power and traction are achieved, but operational costs increase, maintenance requirements increase, noise increases, and emissions are produced
Solution Approach 1:
The patent replaces the gas-fueled combustion engine with an electric motor powered by a battery system. This substitution eliminates emissions and noise associated with internal combustion while reducing operational costs and maintenance requirements, as electric motors have fewer moving parts and no fuel consumption.
Solution Approach 2:
The patent changes the power source parameter from chemical energy (gasoline) to electrical energy (battery). This fundamental parameter change enables the elimination of harmful emissions and noise while reducing the complexity of maintenance, though it requires managing battery weight and power delivery characteristics.
2Object-generated harmful factors
If battery systems are used to power riding lawn mowers, then emissions and noise are reduced, but weight increases and power delivery challenges arise
Solution Approach 1:
The patent divides the battery system into multiple individual battery units rather than using a single large battery. This segmentation allows for better weight distribution across the mower platform, improving traction and handling while maintaining the emission-free and quiet operation benefits of electric power.
Solution Approach 2:
The patent positions battery units at specific locations on the mower to optimize weight distribution. By strategically placing battery weight over or near the drive wheels, the system improves traction where needed while keeping the overall weight manageable and the harmful factors eliminated.
3Device complexity
If multiple cutting blades are powered by a single motor, then device complexity is reduced, but cutting performance and reliability decrease
Solution Approach 1:
The patent assigns separate electric motors to each cutting blade rather than using a single motor to drive multiple blades. This segmentation ensures that each blade can operate independently and reliably, with failover capability if one motor fails, while the modular motor design keeps individual units simple and manageable.
Solution Approach 2:
The patent changes the power delivery parameter from a single centralized motor to multiple distributed motors. This parameter change improves reliability by eliminating a single point of failure, allowing each blade to be independently controlled and maintained, while the overall system complexity remains manageable through standardization.
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 battery-powered system improves efficiency, reduces operational costs, and provides a quieter, cleaner, and more balanced riding experience by distributing weight effectively across the frame.
Implementation Method 1
a battery system mountable to a frame... The electric drive motor is powered by the battery system
Implementation Method 2
an electric drive motor and a cutting deck. The electric drive motor is powered by the battery system and coupled with an axle and a wheel such that when the electric drive motor is powered, the drive motor is configured to provide rotation force to the wheel
Implementation Method 3
a plurality of blade motors configured to rotate the plurality of cutting blades. Each of the cutting blades is powered by a separate blade motor
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A drive system of a battery powered riding lawn mower is provided. The drive system may include a battery system mountable to a frame, an electric drive motor and a cutting deck. The electric drive motor may be powered by the battery system and coupled with an axle and a wheel such that when the electric drive motor is powered, the electric drive motor is configured to provide rotation force to the wheel. The cutting deck maybe attached to the frame and powered by the battery system. The cutting deck may include at least one electric blade motor separate from the electric drive motor and configured to rotate at least one cutting blade rotatably mounted in the cutting deck.