Wind Guard Height Control Mechanism for Grass Pickup Header
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Solution Overview
Problem
Existing agricultural harvesters face challenges in accurately setting the minimum height of the wind guard assembly, which can lead to inefficiencies and crop losses due to uneven swath handling and pressure issues.
Innovation Solution
A pickup assembly with a wind guard height control mechanism that includes a control arm, a height control flange, and a linear actuator, allowing for precise adjustment and automatic return of the wind guard to its set minimum height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wind guard is set close to the ground to handle big uneven swaths, then the ability to handle large swaths is improved, but the wind guard roller struggles to climb on top of lumps and stop rolling
Solution Approach 1:
The wind guard assembly is made dynamically adjustable in height through a control mechanism comprising a control arm, height control flange, and linear actuator. This allows the wind guard to adapt its position based on swath conditions, resolving the contradiction between handling large swaths and maintaining roller functionality.
2Loss of substance
If the wind guard is set to a higher position to prevent crop losses, then crop retention is improved, but the wind guard may not maintain adequate pressure on the swath
Solution Approach 1:
The control mechanism provides feedback-based height adjustment of the wind guard assembly. The system can sense swath conditions and automatically adjust the wind guard position to maintain optimal pressure while preventing crop losses, resolving the contradiction between these two requirements.
3Adaptability or versatility
If the wind guard height is manually adjusted frequently to adapt to varying swath heights, then adaptability is improved, but the complexity of operation increases
Solution Approach 1:
The wind guard assembly incorporates an automatic control mechanism that self-adjusts the wind guard height based on detected swath conditions. This eliminates the need for frequent manual adjustments by operators, providing adaptability while maintaining ease of operation.
4Device complexity
If a simple height adjustment mechanism is used, then device complexity is reduced, but the precision of wind guard height setting deteriorates
Solution Approach 1:
The control mechanism replaces traditional complex mechanical adjustment systems with a more sophisticated system comprising a linear actuator and control arm assembly. This substitution provides precise height control while maintaining reasonable mechanical complexity through efficient design.
Data Source
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AI summary
A pickup assembly (2) for an agricultural harvester (1) comprises a pickup assembly frame (200), a pickup unit (10) carried by the pickup assembly frame (200) and configured to pick up crop from a field, and a wind guard assembly (220) comprising a wind guard frame (225), pivotably coupled to the pickup assembly frame (200) at a wind guard pivot axle (226). The pickup assembly (2) further comprises a wind guard height control mechanism with a control arm (150), a height control flange (155) and a linear actuator (151). The control arm (150) is pivotably coupled to the pickup assembly frame (200) for pivoting coaxially with the wind guard frame (225). The height control flange (155) is provided on the wind guard frame (225) and configured to be in contact with the control arm (150). The linear actuator (151) has a first end connected to the pickup assembly frame (200) and a second end connected to the control arm (150).