Seed-Depositing Row Unit With Multi-Bar Depth and Lift Control
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Solution Overview
Problem
Existing agricultural planters require time-consuming manual adjustments for depth settings on multiple seeding row units, and existing depth adjustment mechanisms add cost without frequent use.
Innovation Solution
A row unit with a seed deposit assembly and a multi-bar linkage assembly, actuated by a primary actuator, that adjusts trench depth and lifts the seeding row unit off the ground, using a resilient structure to maintain consistent depth and a common actuator for multiple units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual depth adjustment mechanisms are provided for each seeding row unit, then depth adjustment capability is available, but adjustment time increases significantly due to the large number of row units
Solution Approach 1:
Multiple depth adjustment mechanisms that were previously distributed across individual row units are merged into a single centralized depth adjustment mechanism. This mechanism uses a drag rod gear system with converging drag rods that can simultaneously adjust the depth of all seeding row units from one location, reducing adjustment time while maintaining full depth adjustment capability.
Solution Approach 2:
The intermediate frame and drag rod gear system serve multiple functions: they provide the mechanical linkage for depth adjustment, act as a support structure for the seeding row units, and enable simultaneous control of multiple units through a single operator interface. This multi-functionality eliminates the need for separate adjustment mechanisms at each row unit.
2Adaptability or versatility
If separate depth adjustment mechanisms are provided for each seeding row unit, then individual depth control is possible, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple individual depth adjustment mechanisms into a single centralized mechanism using an intermediate frame and drag rod gear system. The converging drag rods transmit rotational motion from one gear to multiple seeding row units simultaneously, providing individual depth control capability through a unified system rather than separate mechanisms at each unit.
Solution Approach 2:
The intermediate frame acts as a mediator between the single depth adjustment mechanism and multiple seeding row units. It provides the structural framework and mechanical linkage (through drag rods and gears) that enables one control mechanism to effectively control the depth of multiple individual row units, maintaining adaptability while reducing complexity.
3Productivity
If rockshafts are used to raise or lower row units simultaneously, then simultaneous lifting capability is achieved, but the entire frame must be lifted to disengage seeding row units from soil
Solution Approach 1:
The lifting function is segmented from the main frame structure. Instead of lifting the entire frame to raise row units, the patent uses individual lifting mechanisms at each seeding row unit that can independently raise or lower the row units simultaneously. This segmentation allows row units to be disengaged from soil without moving the entire planter frame.
Solution Approach 2:
The lifting system transitions from a static frame-based approach to a dynamic, independently controllable system. Each seeding row unit has its own lifting mechanism that can be actuated simultaneously, providing flexible and responsive control over row unit position without the constraints of frame lifting. This dynamic approach improves productivity while reducing operational complexity.
Data Source
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AI summary
A row unit (14) for depositing seeds in a furrow (18) formed in soil is disclosed. The row unit (14) comprising: a seed deposit assembly (25) including a gage wheel (27) and a disk (26), the gage wheel (27) configured to contact a top surface of the soil and the disk (26) configured to cut the furrow (18) in the soil for receiving the deposited seeds; a multi-bar linkage assembly (29) operatively connected to the seed deposit assembly (25); and a primary actuator (24, 98) operatively connected to the multi-bar linkage assembly (29, 100), the primary actuator (24,98) being controllably actuated between a retracted position and an extended position; wherein, the primary actuator (24, 98) raises and lowers the seed deposit assembly (25) relative to the soil and moves the disk (26) into the soil to cut the furrow (18) at a depth determined by the primary actuator (24, 98) and the gage wheel (27).