Inclined Blade Guard Pole Layout to Reduce Uncut Plants
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Solution Overview
Problem
Existing guard mechanisms for rotary blades in work machines, such as lawn mowers, cause uncut plant parts due to parallel arrangement of guard portions, leading to inefficiencies in cutting plants while maintaining safety.
Innovation Solution
Incorporating a guard pole portion with an inclined design relative to the machine's longitudinal direction, which includes inclined portions on guard poles to allow plants to rise after being pushed down, reducing uncut parts and enhancing cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard portions are arranged in a direction parallel to the machine body longitudinal direction, then work safety is maintained, but uncut plant parts occur due to plants being stepped on by the guard portion
Solution Approach 1:
The guard pole portion is designed with an inclined shape rather than a parallel arrangement, creating asymmetric geometry that allows plants to rise after being pushed down. The inclined portion extends in an oblique direction relative to the machine body longitudinal direction, preventing plants from being continuously stepped on while maintaining the guard's safety function.
Solution Approach 2:
The guard pole portion is extended in an oblique direction that combines both longitudinal and lateral dimensions. This dimensional change allows the guard to push plants down initially but then permit them to rise as the inclined surface transitions, resolving the contradiction between safety coverage and cutting efficiency.
2Device complexity
If guard portions are arranged parallel to the machine body longitudinal direction, then structural simplicity is maintained, but cutting efficiency deteriorates due to uncut parts
Solution Approach 1:
The guard pole portion adopts an asymmetric inclined design where the extension direction varies along its length. This asymmetric geometry provides cutting efficiency improvement without requiring complex multi-component structures, as it is implemented as a single inclined portion on the guard pole.
3Productivity
If the guard pole portion is designed with an inclined portion extending in an oblique direction, then cutting efficiency is improved by allowing plants to rise, but structural complexity increases
Solution Approach 1:
Only the necessary portion of the guard pole is designed with an inclined shape - specifically the guard pole portion that contacts the plants. The rest of the guard structure can maintain simpler geometry, localizing the complexity only where it provides functional benefit for plant clearance.
Data Source
AI summary
A work machine comprising: a blade; a blade housing; and a guard pole portion provided below the blade, wherein the guard pole portion is supported by the blade housing, and the guard pole portion includes an inclined portion extending in an oblique direction with respect to a machine body longitudinal direction of the work machine.