Row Unit Gauge Wheel Linkage for Precise Seeding Depth
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Solution Overview
Problem
Existing row units for agricultural implements are bulky, complex, and costly, and lack the ability to set drilling depth with precision and adapt to varying ground conditions during operation.
Innovation Solution
A row unit design featuring a seed furrow-opener with a pivotable seed disc and depth regulator, adjustable via a depth-regulating arm and synchronization linkages, allowing for synchronized control of gauge wheel and press wheel positions relative to the seed disc, along with actuators for ground pressure and depth adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional row unit design is used, then the drilling depth can be controlled, but the row unit takes up a great deal of space and is complex to manufacture and maintain
Solution Approach 1:
The patent combines the depth regulator and gauge wheel into a single integrated assembly that pivots about a common axis with the seed disc. This merging of components reduces structural complexity while maintaining drilling depth control capability, directly resolving the contradiction between precision control and device complexity
Solution Approach 2:
The depth-regulating arm serves multiple functions: it positions the gauge wheel, controls drilling depth, and integrates with the seed furrow-opening mechanism. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall structure while preserving depth control precision
2Measurement precision
If the drilling depth is set manually for each row unit, then precision can be achieved, but it is time-consuming and difficult to manage for large machines
Solution Approach 1:
The patent divides the agricultural implement into multiple independent row units, each with its own depth regulator and gauge wheel assembly. This segmentation allows each row unit to be adjusted independently and quickly, reducing the total setup time for large machines while maintaining precise drilling depth control for each unit
Solution Approach 2:
The depth regulator is designed with movable and adjustable components that can be quickly repositioned during operation. The pivotable depth-regulating arm and adjustable gauge wheel position allow dynamic adjustment of drilling depth without requiring time-consuming manual reconfiguration, resolving the contradiction between precision and setup time
3Adaptability or versatility
If the drilling depth is fixed, then the structure is simple, but it cannot adapt to variations in ground bearing capacity
Solution Approach 1:
The patent incorporates a depth regulator with a gauge wheel that provides visual feedback on the drilling depth. This feedback mechanism allows the operator to monitor and adjust the drilling depth in real-time to adapt to variations in ground bearing capacity, achieving adaptability without excessive complexity through simple mechanical indication
Solution Approach 2:
The depth-regulating arm is designed to be pivotable and adjustable, allowing the gauge wheel position to be dynamically changed during operation. This dynamic capability enables adaptation to different ground conditions while maintaining a relatively simple mechanical structure, resolving the contradiction between adaptability and device complexity
Data Source
AI summary
An agricultural implement includes a row unit (2) for feeding granular material to the ground. The row unit has a seed furrow-opener, which has a seed furrow-opening arm (21) carrying a seed disc (22). The seed furrow-opening arm has a proximal portion, in which the seed furrow-opening arm is pivotable about a first geometrical axis (Rb) and a distal portion, to which the seed disc is rotatably attached. The row unit has a depth regulator, which has a depth-regulating arm (31) carrying a gauge wheel (32). The depth-regulating arm (31) is pivotable about a second geometrical axis (Ra) which is concentric with a centre of rotation for the seed disc. The row unit comprises a first adjusting device for setting the height of the gauge wheel (32) in relation to the seed disc (22). The first adjusting device comprises a lever (34), which is fixedly connected to the depth-regulating arm, a depth-regulating driver arm (36) pivotable at the first geometrical axis, and a control link (35), which connects distal portions of the lever (34) and the depth-regulating driver arm (36), so that the pivotal position of the lever is controllable by pivoting the depth-regulating driver arm.