Acute-Angle Flail Impact Surface for Rotary Tiller
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Solution Overview
Problem
Agricultural tillers face challenges in extending the service life of their components due to high load and power consumption, leading to frequent replacements.
Innovation Solution
The milling cutter's flail is designed with an impact surface set at an acute angle to the direction of rotation, reducing load and power consumption, allowing for a longer service life and increased milling capacity with optimized flail design and adjustable angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the impact surface is set perpendicular to the direction of rotation to maximize impulse transfer, then soil material is effectively filled towards the dam, but the load on the flail increases and service life decreases
Solution Approach 1:
The patent changes the angular parameter of the impact surface from perpendicular (90 degrees) to acute angles (10-80 degrees relative to the rotation direction). This parameter modification reduces the impulsive load on the flail while maintaining effective soil processing, thereby extending service life without significantly compromising productivity
2Duration of action of stationary object
If the impact surface is set at a more acute angle to reduce load on the flail, then service life increases, but the milling action is reduced and soil throw-up decreases
Solution Approach 1:
The patent optimizes the angle parameter within the range of 10-80 degrees, finding that this range maintains sufficient milling capacity while significantly reducing load. The acute angle configuration allows the flail to cut through soil like a knife with minimal resistance, achieving a balance between productivity and component longevity
3Productivity
If the milling cutter operates at high speed to increase milling capacity, then productivity increases, but power consumption and load on components increase
Solution Approach 1:
The patent modifies the geometric parameter of the flail (acute angle impact surface) to reduce the resistance force during rotation. This allows the milling cutter to operate at high speeds with reduced power consumption, as the acute angle configuration minimizes the force required to cut and move soil material
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 configuration results in a significantly longer service life for flails and milling cutters, with reduced power consumption and maintained milling capacity, ensuring effective soil processing with minimal soil throw-up, even at high speeds.
Implementation Method 1
This at least one flail has at least one impact surface which loosens the soil material due to the rotary movement of the at least one milling cutter and throws it up into the dam
Implementation Method 2
Due to the acute angled arrangement of the baffle, a considerably reduced milling action of the milling machine is expected, since the flail then cuts through the soil like a knife or a plow
Data Source
Figure 1~2
AI summary
An agricultural rotary tiller (1) is used for cultivating a ridge, in particular an asparagus ridge. For this purpose, the tiller (1) has at least one milling cutter (6) rotating around a drive shaft (7), which can throw soil material onto the ridge. The milling cutter (6) is equipped with at least one flail (9) that rotates with the milling cutter (6) and has at least one impact surface (22) for capturing the soil material. To improve the service life of the tiller (1), the impact surface (22) is angled at an acute angle to the direction of rotation.