Riding Lawn Mower Electrical Layout to Prevent Chute Clogging
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Solution Overview
Problem
Existing riding lawn mower designs face challenges in efficiently disposing electrical components and batteries, leading to potential space constraints, noise interference, and vulnerability to vibrations and electromagnetic waves.
Innovation Solution
The inverter device, controller, and batteries are strategically positioned and designed to minimize noise interference and vibration effects, with a large space behind the electrical box and inclined chute design to prevent clogging, while utilizing a lithium-ion battery and lead battery configuration for efficient power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the inverter device and controller are disposed close together to save space, then space utilization is improved, but the controller may malfunction due to noise interference from the inverter device
Solution Approach 1:
The electrical components are segmented into separate disposal locations: the inverter device is disposed in the bonnet portion while the controller is disposed in the operation portion, physically separating noise-generating components from sensitive control components to prevent electromagnetic interference while maintaining efficient space utilization
Solution Approach 2:
The patent introduces an intermediary spatial arrangement where the inverter device and controller are separated by different structural zones (bonnet portion vs. operation portion), creating a buffer zone that reduces noise interference while maintaining overall system compactness
2Area of stationary object
If the chute cross-sectional area is reduced to save space, then space utilization is improved, but clogging of mowed grass inside the chute occurs
Solution Approach 1:
The chute is designed with non-uniform cross-sectional area along its length, with the upper wall formed to be inclined upward to the rear, creating a locally enlarged vertical cross-sectional area in the left-right direction at critical sections to prevent grass clogging while maintaining compact overall dimensions
Solution Approach 2:
The chute design utilizes the vertical dimension by inclining the upper wall upward to the rear, thereby increasing the vertical cross-sectional area in the left-right direction without increasing the horizontal footprint, effectively preventing clogging while maintaining space efficiency
3Ease of manufacture
If the battery is disposed in a location subject to vibrations to simplify mounting, then ease of manufacture is improved, but damage to the battery caused by vibrations occurs
Solution Approach 1:
The battery is extracted from vibration-prone areas and disposed in a location less susceptible to vibrations of the traveling vehicle body, separating the battery from harmful vibrational environments while maintaining accessible mounting
Solution Approach 2:
The patent implements protective measures beforehand by disposing the battery in a location inherently less susceptible to vibrations, providing passive protection against vibration-induced damage before it can occur
Data Source
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AI summary
The invention provides a work vehicle in which an electrical component of the work vehicle is efficiently disposed. A riding lawn mower includes: a work machine (4) provided at a lower portion of a traveling vehicle body (1) to mow grass; an operation portion (6) which is provided on the traveling vehicle body (1) and on which an operator gets; a chute (46) through which the grass mowed by the work machine (4) passes; a grass collection container (8) that stores the grass passing through the chute (46); and an electrical component (61). An upper wall of the chute (46) is provided in a space behind the electrical component (61), the upper wall being formed to be inclined upward to a rear.