Turf Slicer Vertical Oscillator Phase Control
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Solution Overview
Problem
Existing turf aerators with multiple slicer blades face challenges in achieving full penetration due to increased power and weight requirements, leading to surface disruption and residue issues.
Innovation Solution
A turf slicer with a series of slicer wheels mounted on a drive shaft, where each slicer wheel has radially extending blades that oscillate out of phase with others, allowing concentrated force application to minimize the number of blades penetrating at once, thereby multiplying the downward force and reducing surface disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple slicer blades are mounted on a common axle to achieve dense pattern aeration, then the aeration density is improved, but the power and weight requirements increase, reducing penetration capability
Solution Approach 1:
The invention divides the multiple slicer blades into separate individual wheels rather than mounting them on a common axle. Each wheel operates independently, allowing the system to achieve dense pattern aeration through multiple passes rather than simultaneous multi-blade penetration, thereby reducing the power and weight requirements for each individual blade while maintaining overall productivity.
2Productivity
If multiple slicer blades are mounted on a common axle to achieve dense pattern aeration, then the aeration density is improved, but the weight increases, reducing penetration capability
Solution Approach 1:
The invention segments the aerator into multiple independent single-blade wheels rather than one heavy multi-blade assembly. This segmentation reduces the weight of each individual cutting element, improving penetration capability while achieving dense pattern aeration through the coordinated operation of multiple lighter wheels passed over the turf area.
3Productivity
If traditional tines are used for aeration, then the aeration function is achieved, but surface disruption and residue are increased
Solution Approach 1:
Instead of using traditional tines that lift and remove soil cores (causing surface disruption and residue), the invention inverts the approach by using slicing blades that cut narrow slits through the turf without removing material. This inverted method achieves the aeration function of creating openings while minimizing surface disruption and eliminating residue problems.
4Length of stationary object
If slicer blades are designed to penetrate deeply, then full root aeration is achieved, but the force required increases, reducing operational efficiency
Solution Approach 1:
The invention incorporates vibration mechanisms that oscillate the slicer blades during penetration. This mechanical vibration reduces the static friction and resistance encountered by the blades, allowing them to achieve full penetration depth with significantly reduced force requirements, thereby improving operational efficiency while maintaining effective root aeration.
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 enables efficient penetration of turf with reduced surface disruption and minimal residue, allowing for a dense pattern of slices while maintaining operational efficiency.
Implementation Method 1
Each circular hub has an off-center opening that is non-rotatably mounted on the drive shaft so that the arcuate portion of the perimeter of each hub that is most remote from the off center opening forms a lobe. When the hubs are mounted with their off center opening on the drive shaft, the lobes protrude from drive shaft. When the drive shaft rotates, the lobes oscillate about the drive shaft.
Implementation Method 2
A series of slicer wheels, each including a plurality of radially extending slicer blades, are rotatably supported on the drive shaft. The slicer blades are positioned in substantially the same plane and extend radially at equal angles from one another about the central axis of the slicer wheel so that the slicer blades closely follow one another into the soil as the slicer wheels 'walk' through the turf
Data Source
AI summary
A turf slicer includes a gang of six slicer wheels that “walk” through the turf in response to the forward motion of the turf slicer. In the meantime, the power takeoff from the tractor vertically oscillates the slicer wheels out of phase with one another, so that every sixth wheel is being thrust downwardly to bear most of the weight of the turf slicer as the other five wheels in the gang of six are either being withdrawn upwardly or moved downwardly and do not bear much weight, so that the weight of the turf slicer is concentrated on the downwardly moving slicer wheel that is approaching bottom dead center of its movement, thereby amplifying the effective weight of the turf slicer against the turf below.