Rear-Discharge Lawn Mower Guide Plate for Even Grass Flow
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Solution Overview
Problem
Existing lawn mowers with adjacent blades rotating in the same direction often discharge cut grass in clumps, leading to uneven and disorganized mowing results.
Innovation Solution
A lawn mower design with blades rotating in opposite directions and a guide plate positioned between the blade centers to direct cut grass evenly, preventing clumping and ensuring uniform discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If blades rotate in the same direction, then the structure is simple, but cut grass discharges in clumps leading to uneven mowing results
Solution Approach 1:
The patent applies the inversion principle by making adjacent blades rotate in opposite directions instead of the same direction. This reversal of the conventional approach prevents cut grass from merging into clumps, as the opposite rotation directions create divergent discharge patterns that result in uniform mowing results across the lawn surface.
2Manufacturing precision
If a guide plate is added to direct grass discharge, then mowing uniformity improves, but device complexity increases
Solution Approach 1:
The patent employs the intermediary principle by introducing a guide plate positioned between adjacent blades. This guide plate serves as a mediator that directs the discharge of cut grass, preventing it from merging into clumps and ensuring uniform distribution across the mowing area, thereby improving mowing uniformity without requiring complex mechanical modifications to the blade system.
Data Source
AI summary
A guide plate for guiding grass that has been cut by a lawn mower having adjacent blades that are rotating in different directions is provided. The lawn mower includes a first blade having a first tip, and a second blade having a second tip, wherein the first blade and the second blade are disposed adjacent to each other, and a rotation direction of the first blade is different from a rotation direction of the second blade, wherein, in a lateral direction of the lawn mower, a guide plate is disposed between a rotation center of the first blade and a rotation center of the second blade, and the guide plate is disposed above the second blade, and the guide plate extends toward a rear of the lawn mower.