Rotary Harrow Insert With Variable Thickness And Rounded Corner
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Rotary harrow tools experience significant wear and require complex or power-intensive designs to extend their life and reduce operational power consumption.
Innovation Solution
A rotary harrow tool with a body forming a blade, featuring inserts with a rounded inner corner and variable thickness, mounted rigidly on a hollow receiving site or an intermediate support piece, providing a simple bevel shape and optimized stress distribution for enhanced wear resistance and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inserts with complex shape (nose associated with shoulder) are used to increase tool life, then wear resistance is improved, but device complexity increases
Solution Approach 1:
The insert is divided into functionally distinct zones: a rounded inner corner for stress distribution, a variable thickness profile for optimized strength-to-weight ratio, and a bevelled working face for soil engagement. This segmentation allows each zone to perform its specific function efficiently without requiring complex overall geometry
Solution Approach 2:
The insert employs local quality variations through its variable thickness profile, being thickest at the rounded inner corner where stress concentration occurs and gradually thinning toward the rear. This localized material distribution provides maximum strength where needed while minimizing overall complexity and weight
2Reliability
If inserts with wide-angle angular active edge (greater than 90°) are used to maintain working regularity, then tool life is extended, but power consumption increases
Solution Approach 1:
The rounded inner corner of convex shape replaces the traditional sharp angular edge, creating a curved stress distribution path. This curvature allows the insert to maintain working regularity through progressive wear while reducing the initial power needed to engage the soil, as the rounded profile naturally guides soil particles rather than requiring high force to initiate cutting
3Ease of manufacture
If inserts with constant thickness are used to simplify manufacturing, then ease of manufacture is improved, but stress distribution during operation worsens
Solution Approach 1:
The insert thickness parameter varies continuously from the front to the rear, creating an optimized stress distribution profile. The variable thickness is achieved through conventional manufacturing processes such as CNC machining or forming, maintaining ease of manufacture while dramatically improving stress distribution compared to constant thickness designs
Data Source
AI summary
A rotary harrow tool includes a body with a lower part that has, in the zone of its lower end, a working portion capable of and designed for being engaged and displaced in the soil and is equipped with at least one element attached in the form of an insert constituting at least the active front edge and the active adjoining elongated face of the working portion at least of the tool. The upper insert, situated opposite the free or lower end of the second part, has a rounded inner corner. Each insert has a substantially plane structure with, viewed in section along a plane perpendicular to the active edge and to the active face, a variable thickness that decreases from its front longitudinal rim forming the active edge to its rear longitudinal rim mounted in the receiving site, while forming a bevel by cooperation with the support piece.