Agricultural Pick-Up Device with Load-Adaptive Crop Channel
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Solution Overview
Problem
Existing pick-up devices for agricultural harvesting machines face inefficiencies in crop collection due to irregular crop layer thicknesses, leading to unstable crop flow and increased risk of clogging, as they require manual adjustment of hold-down devices to adapt to changing conditions.
Innovation Solution
A pick-up device with a crop channel whose width is adjustable based on load detection, using a hydraulic actuator connected to the drive assembly, which automatically adjusts the channel width to match crop layer thickness, and includes a driven roller for reduced friction and jam clearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hold-down device is manually adjusted to adapt to changing crop layer thicknesses, then the crop transport can be optimized for specific conditions, but the operation becomes complex and requires constant driver attention
Solution Approach 1:
The hold-down device automatically adjusts its own position based on crop layer thickness without requiring manual intervention. The system uses the drive assembly's load signal to self-regulate the channel width, making the device serve itself rather than requiring constant driver attention while maintaining crop transport efficiency
Solution Approach 2:
The actuator is connected to a means for detecting load of the drive assembly, creating a feedback loop where the system continuously monitors drive load and automatically adjusts hold-down device position in response to changing crop conditions, eliminating the need for manual adjustment while optimizing crop transport
2Reliability
If the hold-down device position is adjusted to handle thick crop layers, then clogging is prevented, but the conveying effectiveness decreases when crop layer is thin
Solution Approach 1:
The hold-down device transitions from a static position to a dynamic, adjustable position that changes with crop conditions. The actuator enables real-time modification of channel width based on actual crop layer thickness, allowing the system to maintain optimal performance across varying conditions rather than being fixed at a single position
Solution Approach 2:
The system changes the physical parameter of channel width dynamically based on crop layer thickness. When crop layer is thick, the channel widens to prevent clogging; when crop layer is thin, the channel narrows to maintain conveying effectiveness, thus adapting parameters to match operating conditions
3Productivity
If the crop channel width is increased to handle thick crop layers, then the conveying capacity is improved, but the device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The drive assembly serves dual functions: it both drives the pick-up drum for crop collection and provides load signals for automatic hold-down device adjustment. This multi-functionality eliminates the need for separate sensing and actuation systems, reducing overall device complexity while maintaining increased conveying capacity through automatic channel width adjustment
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
Ensures uniform and reliable crop transport by adapting to varying crop thickness, reducing the risk of clogging and increasing conveying capacity, while allowing for easy reversal of conveying direction to clear jams.
Implementation Method 1
an actuator (25, 26) associated with the hold-down device (10), which is connected to a means for detecting a load of the drive assembly (17, 18) in order to adjust the width of the harvested crop channel (7) according to the load
Implementation Method 2
to enable low-friction, smooth crop transport
Data Source
Figure 1~2
Figure 3~4
AI summary
The receiving device (1) comprises a collection drum (5) for collecting the harvested crops lying on the ground (2), and a harvested crop channel (7) for receiving the collected harvested crop, which is delimited by a hold-down device (10,39) and its width is variable by adjusting the hold-down device. A drive unit is provided for driving the collection drum and an actuating element (25,26) is assigned to the hold-down device. The actuating element is connected to a load detection unit of the drive unit to adjust the width of the harvested crop channel according to the load.