Seed Meter Projections for Reliable Hand-off
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Solution Overview
Problem
Existing seed metering systems face challenges in maintaining accurate and consistent seed spacing, especially at higher planting speeds, due to difficulties in the hand-off of seeds from the metering member to the delivery system.
Innovation Solution
A metering member with projections extending inwardly from the inner surface of the sidewall, which pushes seeds adhered to apertures into a delivery system, ensuring consistent and reliable transfer of seeds to the delivery system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If seeds are transferred from the metering member to the delivery system by gravity alone, then the device complexity is reduced, but the seed spacing accuracy deteriorates at higher planting speeds
Solution Approach 1:
The projection acts as an intermediary element between the metering member and the delivery system. It actively pushes the seed from the aperture onto the delivery system, ensuring controlled transfer and consistent spacing, rather than relying on passive gravity-based transfer
2Productivity
If the planting speed is increased to improve productivity, then the productivity increases, but the seed spacing accuracy deteriorates due to inconsistent hand-off
Solution Approach 1:
The projection is positioned to contact the seed before it leaves the metering member, preliminarily guiding and positioning the seed for transfer to the delivery system. This preliminary action ensures consistent seed placement even at higher speeds where timing and positioning criticality increases
3Ease of operation
If a passive gravity-based seed transfer is used, then the ease of operation is improved, but the reliability of consistent seed spacing deteriorates
Solution Approach 1:
The projection is integrated into the metering member itself, allowing the metering member to actively perform the transfer function. The projection automatically engages with the seed at the correct position and pushes it onto the delivery system, making the transfer process self-regulating and reliable without requiring separate active control 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 improves the hand-off of seeds from the metering member to the delivery system, maintaining accurate seed spacing and consistency even at higher planting speeds, enhancing overall seed distribution accuracy.
Implementation Method 1
air pressure differential, either vacuum or positive pressure, to adhere seed to a metering member
Implementation Method 2
vacuum applied on the opposite side of the disk adheres seed to the apertures
Data Source
Figure 1
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AI summary
A metering member (100) for a seed meter having a with a sidewall (104) formed with an radially outward and axially flared rim portion (112) is provided. A plurality of apertures (114) extend though the nm portion to which seed is adhered. The metering member is oriented at an angle to the vertical such that an upper portion of the metering member extends beyond a lower portion of the metering member. This orientation allows a seed delivery system to extend into the interior of the metering member and cooperate with the overhanging metering member to remove seed therefrom.