Furrow Opener Two-Way Depth Control
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Solution Overview
Problem
Existing furrow openers face challenges in effectively placing seeds and fertilizers in a single pass without plugging issues, inadequate depth control, and high maintenance costs, particularly in no-tillage planting techniques.
Innovation Solution
A furrow opener device featuring a disc with a wing member to form a groove for seed placement and a packer mechanism for depth control, using a gauge wheel or trailing packer wheel, which allows for precise depth adjustment and prevents seed bounce into the fertilizer furrow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a wing with fertilizer nozzles is supported on the seed boot, then fertilizer can be deposited in proximity to the seed row, but the injectors are readily subject to plugging which prevents effective fertilizer placement
Solution Approach 1:
The device separates the fertilizer delivery function from the seed boot by providing a distinct fertilizer tube that is spaced apart from the seed boot. This segmentation allows fertilizer to be deposited through a separate delivery mechanism that is not subject to plugging from seed handling, while still achieving proximity placement relative to the seed row.
Solution Approach 2:
A shield member is introduced as an intermediary component between the fertilizer tube and the surrounding environment. The shield member protects the fertilizer delivery system from interference with seed handling operations, preventing seed debris from entering the fertilizer tube and causing plugging, while maintaining the proximity placement function.
2Productivity
If a complex mechanism with two discs is used to position seed and fertilizer rows in a single pass, then seed and fertilizer can be placed in a single pass, but the resulting configuration is costly to manufacture and requires more maintenance
Solution Approach 1:
The single disc is designed with multi-functionality, incorporating both a scraper body for furrow formation and a wing member for groove creation in the same component. The disc also integrates both seed delivery and fertilizer delivery capabilities through properly positioned tubes, allowing one disc to perform the work that previously required two separate discs, thus reducing complexity while maintaining single-pass productivity.
Solution Approach 2:
The invention merges the functions of separate discs into a single integrated disc assembly. The scraper body and wing member are combined in one disc, and both seed and fertilizer delivery systems are integrated into the same disc structure, reducing the total number of components while achieving the same single-pass planting objective.
3Ease of manufacture
If a horizontal plate is used to widen the furrow and form a shelf, then seed can be deposited on the shelf, but seed can readily bounce off of the seed shelf and into the deeper portion of the furrow adjacent the fertilizer
Solution Approach 1:
The wing member is designed with an asymmetric, inclined configuration rather than a horizontal plate. The wing member slopes downward and outward, creating a controlled groove that guides seed laterally away from the fertilizer while preventing seed from bouncing into the deeper furrow. This asymmetric geometry provides both structural simplicity and precise seed placement control.
Solution Approach 2:
Instead of using a horizontal plate that creates a shelf in one dimension, the wing member extends into a second dimension by projecting laterally outward from the disc. This creates a three-dimensional groove structure that guides seed placement laterally while maintaining vertical control, preventing seed from bouncing into the deeper furrow portion.
4Measurement precision
If a gauge wheel is positioned very close to the furrow opener, then depth adjustment is more precise, but more packing force is available with the trailing arm system
Solution Approach 1:
The device provides dynamic depth control through a packer mechanism that can be adjusted between two configurations. In the first configuration, the packer arm is pivotally supported allowing the packer wheel to move vertically with the gauge wheel for precise depth control. In the second configuration, the packer arm is fixed to provide maximum packing force. This dynamic adjustability allows the system to optimize between precision and force based on operating conditions.
Data Source
AI summary
A furrow opener device includes a disc arranged to open a primary furrow in the ground. A scraper body has a leading scraper edge supported alongside the disc to scrape the disc. A wing member is supported on a bottom portion of the scraper body in proximity to a bottom end of the disc and extends laterally outwardly away from the disc so as to be arranged to open a groove in the primary furrow projecting laterally to one side of the primary furrow, and a tube extends generally downward to an output opening located adjacent the wing member and is arranged for depositing product into the groove. A packer wheel is arranged in a first configuration where depth of disc penetration is gauged by a gauge wheel adjacent to the furrow opener and in a second configuration in which depth is gauged by the packer wheel.