Seed Planter Row Unit Depth Adjustment With Gauge Wheel Linkage
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Solution Overview
Problem
Existing seed-planting implements lack effective furrow depth adjustment systems that can adapt to varying soil moisture conditions, necessitating improved furrow depth control for optimal seed planting.
Innovation Solution
A row unit for a seed-planting implement featuring a frame, disk opener, gauge wheel, wobble bracket, linkage arm, actuator, gearbox, and threaded shaft, allowing for both manual and automatic adjustment of furrow depth through a combination of handle operation and actuator control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a furrow depth adjustment system is implemented, then adaptability to varying soil moisture conditions is improved, but device complexity increases
Solution Approach 1:
The patent implements a dynamic furrow depth adjustment system where the gauge wheel position can be modified during operation. The linkage arm connects the gauge wheel assembly to the frame, allowing the gauge wheel to be positioned at different depths by adjusting the linkage arm's pivot point on the frame. This dynamic adjustability enables the system to adapt to varying soil moisture conditions while maintaining a relatively simple mechanical structure using basic pivot joints and linkage mechanisms.
2Ease of operation
If manual and automatic adjustment mechanisms are combined, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The linkage arm serves multiple functions: it connects the gauge wheel to the frame, transmits adjustment forces, and provides pivot points for both manual adjustment (via the handle that moves the gauge wheel laterally) and automatic adjustment (via the actuator that moves the linkage arm pivot point on the frame). This multi-functionality allows both manual and automatic adjustment capabilities while minimizing the number of separate components needed.
3Manufacturing precision
If precise furrow depth control is achieved, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The gauge wheel acts as a feedback mechanism by rolling on the soil surface and maintaining contact, which provides natural feedback on the furrow depth. When the disk opener creates a furrow, the gauge wheel follows along the side of the furrow, and its position relative to the frame determines the furrow depth. The system self-regulates through this mechanical feedback, achieving precise depth control without requiring complex electronic sensors or control systems.
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
Enables precise and adaptable furrow depth adjustment, enhancing seed planting efficiency by accommodating varying soil conditions and ensuring consistent seed placement.
Implementation Method 1
a threaded shaft coupled to the gearbox. In addition, the row unit includes an actuation assembly coupled between the linkage arm and the threaded shaft such that the actuation assembly transmits rotation of the threaded shaft into linear motion of the linkage arm
Implementation Method 2
an actuator configured to move the linkage arm relative to the frame in a manner that adjusts a position of the gauge wheel relative to the frame
Implementation Method 3
a gauge wheel rotatably coupled to the gauge wheel arm, with the gauge wheel configured to roll along a surface of the field
Data Source
AI summary
A furrow depth adjustment system for a seed-planting implement includes a wobble bracket configured to engage a gauge wheel arm of the seed-planting implement. Furthermore, the furrow depth adjustment system includes a linkage arm coupled to the wobble bracket. Moreover, the furrow depth adjustment system includes an actuator, such as an electric motor, configured to rotate a threaded shaft and a handle coupled to the threaded shaft. Additionally, the furrow depth adjustment system includes an actuation assembly having a hook arm directly coupled to the linkage arm and a collar threadingly coupled to the threaded shaft. Thus, the actuation assembly transmits rotation of the threaded shaft into linear motion of the linkage arm, which moves the wobble bracket to adjust the furrow depth of the implement.