Mower Blade Housing With Selective Partitions for Grass Flow

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Solution Overview

Problem

Existing lawn mowers with partitions between cutter blades hinder efficient cutting of turfgrass due to restricted movement of cut grass, leading to inefficient use of multiple blades.

Innovation Solution

A lawn mower design with a blade accommodating section featuring an upper wall and peripheral wall that accommodates multiple cutter blades rotating in the same direction, with a partition member between some blades and no partition between others, along with grass catch members to facilitate grass movement and discharge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If partition members are provided between all cutter blades, then structural stability is improved, but cut grass movement is restricted and cutting efficiency deteriorates

Engineering Contradiction:

Improvestructural stabilityVSAvoidcutting efficiency

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The blade accommodating section is divided into multiple blade accommodating spaces by partition members, with each space accommodating one or more cutter blades. This segmentation provides structural stability while allowing selective openness in certain regions to maintain grass flow

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The partition members are configured with different properties in different locations: the first partition member has an open side facing the discharge direction to allow grass flow, while the second partition member is substantially closed to provide structural stability. This local differentiation resolves the contradiction between stability and efficiency

Inventive Principle:

Principle #3Local quality

2Productivity

If multiple cutter blades are accommodated side by side, then cutting capacity is improved, but grass fluidity deteriorates due to partition restrictions

Engineering Contradiction:

Improvecutting capacityVSAvoidgrass fluidity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The blade accommodating section is segmented into multiple blade accommodating spaces, each capable of holding one or more cutter blades. This allows increased cutting capacity while managing grass flow through strategic opening design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of making all partition members closed for stability, the first partition member is designed with an open side facing the discharge direction, inverting the conventional approach to prioritize grass flow while maintaining structural integrity through the second partition member

Inventive Principle:

Principle #13The other way round (Inversion)

3Stability of the object's composition

If partition members are provided between cutter blades, then blade stability is improved, but power consumption increases due to restricted grass movement

Engineering Contradiction:

Improveblade stabilityVSAvoidpower consumption

Core Design Contradiction:

Stability of the object's compositionVSUse of energy by moving object

Solution Approach 1:

Different partition members are designed with different qualities: the first partition member is open to reduce resistance and power consumption, while the second partition member is closed to maintain blade stability, achieving optimal balance between energy efficiency and structural support

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250287870A1Mower

Publication Date: 2025.09.18 HONDA MOTOR CO LTD

AI summary

A mower includes: a plurality of wheels; at least one cutter blade that cuts turfgrass; and a blade accommodating section that accommodates the cutter blade, in which the blade accommodating section includes an upper wall section and a peripheral wall section, the peripheral wall section has an inside accommodating three or more of the cutter blades side by side, the cutter blades rotating in the same direction, a partition member is provided between the two cutter blades accommodated in one end side of the upper wall section, and the partition member is not provided between the cutter blades accommodated in the other end side of the upper wall section.