Mower Rotating Body with Segmented Synthetic Resin Flange
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Solution Overview
Problem
Conventional rotating bodies with linear cutters used in mowers experience irregular operation due to various loads and ground unevenness, leading to reduced cutting quality and shorter linear cutter life as they often come into contact with the ground, affecting their speed and longevity.
Innovation Solution
A rotating body design featuring a synthetic resin main body with a brace, flange portion, and engaging structure that positions the linear cutter above the flange, preventing ground contact by using centrifugal force to keep the cutter horizontal, with a detachable flange portion for easy replacement and improved cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the linear cutter is pulled out significantly from the outer circumferential surface of the rotating body, then the linear cutter can be kept at a predetermined distance from the ground surface, but the linear cutter operates in an irregular manner and easily comes into contact with the ground surface due to various loads and ground unevenness
Solution Approach 1:
The rotating body is divided into an upper body and a lower body that are integrally joined with the flange portion therebetween. This segmentation creates a structured assembly that stabilizes the linear cutter position while maintaining the distance from the ground surface, preventing irregular operation caused by external loads and ground unevenness.
Solution Approach 2:
The flange portion acts as an intermediary element between the upper body and lower body, providing a stable mounting surface for the linear cutter. This intermediary structure ensures the linear cutter maintains a consistent position and distance from the ground, preventing contact while handling various loads effectively.
2Productivity
If the linear cutter rotates at high speed during mowing, then cutting efficiency is improved, but the linear cutter easily comes into contact with the ground surface, making it difficult to maintain top speed and reducing cutter life
Solution Approach 1:
The rotating body is segmented into upper and lower bodies joined by the flange portion, creating a stable structure that maintains linear cutter position at high rotation speeds. This prevents ground contact that would otherwise occur during high-speed operation, preserving both cutting efficiency and quality.
Solution Approach 2:
The flange portion is designed to preemptively prevent ground contact by maintaining the linear cutter at a predetermined distance from the ground surface. This prior positioning cushioning ensures that even during high-speed rotation, the linear cutter cannot contact the ground, thereby maintaining top speed and cutting quality.
3Reliability
If the linear cutter is engaged with the rotating body, then the cutter can be positioned above the flange portion, but the structure becomes more complex with multiple components
Solution Approach 1:
The upper body, lower body, and flange portion are integrally joined to form a unified rotating body structure. This merging of components simplifies the overall design while maintaining the complex positioning functionality, as the integral joint ensures stable linear cutter positioning without requiring additional separate mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design maintains favorable cutting quality and extends the life of linear cutters by preventing ground contact, allowing them to maintain top speed and reducing operator labor, with the flange portion's detachability enabling easy replacement and preventing defects.
Implementation Method 1
The linear cutter, pulled out significantly from the outer circumferential surface of the rotating body, is drawn radially outward by the centrifugal force, keeping a predetermined distance between the linear cutter and the ground surface
Data Source
AI summary
In order to obtain favorable cutting quality throughout a long-term, a rotating body has a brace that rotates integrally with a drive shaft of a mower, and a main body made of synthetic resin that is joined to the brace. The main body includes an upper body that is joined to the brace, a flange portion having a diameter larger than that of the upper body, a lower body having a diameter smaller than that of the flange portion, and an engaging structure with which the linear cutter is engaged. The upper body has, on the outer circumferential surface thereof, a plurality of outlets, from each of which one end of the linear cutter is pulled out. With the upper body integrally joined to the lower body with the flange portion therebetween, the linear cutter that is pulled out of each of the outlets is positioned above the flange portion.