Self-adjusting Harvester Deck Plate Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional agricultural harvester headers require simultaneous adjustment of all row units for varying corn crops, limiting individual row unit adjustments and accommodating different corn stalk widths, which can lead to inefficiencies and losses during harvesting.
Innovation Solution
A self-adjusting deck plate mechanism with a control arm, linkage assembly, and biasing member allows independent adjustment of each row unit's stripping plates, using stop clamps and a spring to automatically adjust the gap between the plates based on stalk width, while maintaining compatibility with existing hydraulic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pneumatic pressure source controls all row units simultaneously, then the system structure is simplified, but individual row unit adjustment capability is lost
Solution Approach 1:
The control system is segmented into individual row unit control mechanisms. Each row unit has its own adjustment mechanism with stops, linkage assembly, and biasing member that can be independently adjusted, allowing each row unit to accommodate different corn stalk widths independently while maintaining overall system simplicity
Solution Approach 2:
Each row unit is equipped with self-adjusting capability through the linkage assembly and biasing member that automatically adjust the deck plate position based on stalk width variations, eliminating the need for complex centralized control while enabling individual adaptation
2Device complexity
If the deck plate gap is fixed, then the structure is simpler, but it cannot accommodate varying corn stalk widths
Solution Approach 1:
The deck plate structure transitions from fixed to dynamic adjustment. The linkage assembly connects the deck plate to the control arm, allowing the gap to dynamically adjust within a range defined by the stops. This enables adaptation to varying stalk widths while maintaining structural simplicity through the mechanical linkage design
Solution Approach 2:
The gap between deck plates is changed as a variable parameter rather than a fixed dimension. The stops are positioned at different locations along the control arm to define the adjustment range, allowing the gap parameter to be modified within limits to accommodate different corn stalk widths
3Stability of the object's composition
If the deck plate is rigidly fixed, then positioning is more stable, but it cannot automatically adapt to stalk width variations
Solution Approach 1:
The deck plate system performs self-adjustment through the linkage assembly and biasing member. When corn stalks engage the deck plate, the linkage automatically translates this force into positional adjustment, enabling automatic adaptation to stalk width variations while maintaining stable positioning through the biasing member and stops
Solution Approach 2:
The system incorporates mechanical feedback through the linkage assembly that senses stalk width variations and automatically adjusts the deck plate position in response. The biasing member provides continuous force to maintain optimal positioning, creating a self-regulating system that adapts to changing conditions
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 efficient and independent adjustment of each row unit to accommodate varying corn stalk widths, reducing losses and simplifying operator adjustments, while maintaining compatibility with existing hardware.
Implementation Method 1
The adjustment mechanism comprises a control arm, a linkage assembly and a biasing member. The linkage assembly is connected to the control arm and pivotably connected to said one of the first and second stripping plates. The biasing member biases the linkage assembly along the control arm toward a predetermined position.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A row unit (22, 122) of an agricultural harvester (10) is disclosed for the automatic adjustment of a gap size of the row unit stripping plates. The row unit includes first and second longitudinally extending stripping plates (28, 30) mounted on a frame (32) and having opposed stripping edges which define a gap (34) between them. The row unit further includes a gap adjustment mechanism (36, 136) for adjusting a size of the gap between the first and second stripping plates. The gap adjustment mechanism includes a control arm (38), a rocker assembly (40) operatively connected to one of the first and second stripping plates and slidably connected to the control arm, and a biasing member (41) for biasing the rocker assembly along the control arm toward a predetermined position corresponding to a predetermined gap size.