Mower Cutting Protection Layout for Safe Boundary Cutting
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Solution Overview
Problem
Intelligent mowers face safety issues due to the distance between the machine body and the ground, which allows feet to extend below the machine body, necessitating manual maintenance of the lawn edges, and the cutting mechanism's safety barrier is too large, limiting effective cutting.
Innovation Solution
A mower design with side and bottom protections, a grass inlet, and adjustable cutting mechanisms that allow closer cutting to the edge while ensuring safety, including a movable cutting system and position control to adapt to obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between the machine body and ground is increased to prevent feet from contacting the cutting element, then safety is improved, but the cutting width is reduced and edge cutting capability is lost
Solution Approach 1:
The protection system is segmented into two parts: side protection extending laterally and bottom protection extending downward. This segmentation allows the side protection to provide safety while the bottom protection maintains cutting capability near the ground, resolving the contradiction between safety and cutting width.
Solution Approach 2:
The solution transitions from a single-dimensional vertical distance constraint to a two-dimensional protection system combining lateral extension (side protection) and vertical extension (bottom protection). This dimensional change enables both safety and effective cutting width to be achieved simultaneously.
2Reliability
If the distance between the cutting element and machine body outer wall is increased to prevent contact, then safety is improved, but the ability to cut lawn edges is reduced
Solution Approach 1:
The bottom protection is designed to be movable rather than fixed, allowing it to dynamically adjust its position. This enables the cutting element to approach the machine body outer wall closely for effective edge cutting while the movable bottom protection maintains safety by preventing foot contact.
Solution Approach 2:
The distance between the cutting element and machine body outer wall is optimized to be less than 20mm, a parameter change that enables edge cutting capability while the bottom protection mechanism maintains safety, resolving the contradiction between ease of operation and safety.
3Ease of operation
If the bottom protection is designed with a grass inlet, then cutting smoothness is improved, but the risk of foot contact with cutting elements increases
Solution Approach 1:
The bottom protection features localized quality differentiation: it has a grass inlet area for cutting smoothness and a protective barrier area for safety. This local quality approach allows the grass inlet to enable smooth cutting while the surrounding protective structure maintains safety by preventing foot contact.
Data Source
AI summary
A mower comprises a cutting mechanism, configured to execute a cutting operation; a machine body, wherein the machine body is connected with a side part protection which is located in the side of the cutting mechanism to establish a protection barrier in the side of the cutting mechanism; and a bottom protection, located below the cutting mechanism to establish a protection barrier below the cutting mechanism, wherein the bottom protection is provided with a grass inlet. A human body is prevented from making contact with the cutting mechanism from the side direction of the cutting mechanism, the bottom protection prevents the human body from making contact with the cutting mechanism from the lower side of the cutting mechanism, and the bottom protection is provided with a grass inlet, such that the cutting is smoothly performed.