Lawn Mower Grass Support Structure for Low-Speed Clean Cutting
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Solution Overview
Problem
Conventional lawn mowers face issues with grass being pushed down or torn apart during cutting, especially at lower speeds, leading to uneven cutting and increased energy consumption at higher speeds.
Innovation Solution
A lawn mower design featuring a supporting mechanism with grass inlet channels and supporting pieces that enhance grass bending resistance, allowing smooth cutting at lower speeds and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the cutting speed of the blade is low, then the energy consumption is reduced, but the grass is easily pushed down or torn apart causing miss cutting or uneven cutting
Solution Approach 1:
The patent introduces supporting pieces as intermediary elements between the grass and the blade. These supporting pieces provide mechanical support to the grass during cutting, preventing it from being pushed down or torn apart. This allows the blade to cut at lower speeds without sacrificing cutting quality, as the supporting pieces compensate for the reduced cutting force available at lower speeds.
Solution Approach 2:
The patent changes the physical parameters of the cutting system by introducing supporting structures that modify the mechanical properties of the grass-cutting interface. The supporting pieces alter the boundary conditions of the grass, providing additional support that enables effective cutting at lower blade speeds. This parameter change allows the system to operate efficiently at lower speeds while maintaining cutting quality.
2Manufacturing precision
If the cutting speed of the blade is high, then the cutting quality is improved, but the energy consumption is sharply increased
Solution Approach 1:
The supporting pieces act as intermediaries that enable high-quality cutting without requiring high blade speeds. By providing mechanical support to the grass, they ensure that the grass remains stable and properly positioned during cutting, allowing the blade to operate at lower speeds while still achieving smooth, clean cuts.
Solution Approach 2:
The patent replaces the reliance on high-speed mechanical cutting with a combined system that uses structural support (supporting pieces) plus lower-speed cutting. This substitution allows the system to achieve the same cutting quality without the high energy consumption associated with high-speed operation.
3Manufacturing precision
If the cutting speed of the blade is increased to prevent grass from being pushed down or torn apart, then the cutting smoothness is improved, but the total bending resistance of the grass increases requiring more energy
Solution Approach 1:
The supporting pieces serve as intermediaries that bear part of the mechanical load during cutting. By providing support underneath the grass, they reduce the bending resistance that the blade must overcome. This allows the blade to cut smoothly without needing to generate high cutting forces, thereby reducing the energy required to overcome grass resistance.
Data Source
AI summary
A lawn mower comprising a lawn mower body, wherein a cutting chamber is arranged at the bottom of the lawn mower body, a blade is rotatably connected to the middle of the cutting chamber, and a plurality of first grass inlet channels communicated with the cutting chamber are arranged on the front side of the bottom of the lawn mower body, wherein the plurality of first grass inlet channels are provided with a supporting mechanism for improving the total bending resistance of the grass in the cutting process; during the traveling of the lawn mower body, the grass to be cut enters between the plurality of supporting pieces from the first grass inlet channels and the second grass inlet channels of the base of the supporting mechanism, and the top of the grass to be cut passes out from the supporting pieces.