Cutting Element Guide Surface for Stubble Distribution
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Solution Overview
Problem
Existing crop harvesting attachments, such as corn pickers and headers, face issues with inefficient stubble distribution, dust generation, and potential damage from foreign objects due to the lack of effective stubble processing by rotating cutting elements, leading to additional work and soil compaction for stubble breakdown.
Innovation Solution
The cutting element is equipped with a guide surface extending downwards from its plane, angled inward to direct air and biomass towards the axis of rotation, forming a 'bell' or 'cage' that ensures material is deposited on the ground, reducing dust and foreign object risks while promoting stubble breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rotating chopper knives are used to cut stalks at high speed, then cutting efficiency is improved, but dust is generated which obstructs the driver's view
Solution Approach 1:
A dust collection system with suction nozzles positioned near the cutting zone acts as an intermediary to capture dust particles before they disperse into the air. The suction nozzles are connected to a dust collection device that removes dust from the working area, thereby maintaining visibility while preserving high-speed cutting efficiency
Solution Approach 2:
The dust collection system utilizes pneumatic principles by employing suction nozzles that create negative pressure to draw dust particles away from the cutting zone. This pneumatic mechanism effectively removes harmful dust without interfering with the mechanical cutting process
2Productivity
If rotating chopper knives cut stalks multiple times, then stalk processing is improved, but additional work and soil compaction are required for stubble breakdown
Solution Approach 1:
The cutting and stubble processing functions are merged into a single integrated operation. The rotating chopper knives are designed to simultaneously cut stalks and process stubble in one pass, eliminating the need for separate stubble breakdown operations and reducing soil compaction from multiple vehicle passes
Solution Approach 2:
The rotating chopper knives serve multiple functions: cutting stalks, chopping stubble, and distributing plant material. This multi-functional design allows a single device to perform what previously required multiple separate operations, saving time and reducing soil compaction
3Productivity
If rotating chopper blades revolve at high speed, then cutting performance is improved, but foreign objects such as stones are thrown away creating safety hazards
Solution Approach 1:
A protective structure or deflector acts as an intermediary between the rotating chopper blades and the environment, intercepting foreign objects before they can be projected outward. This mediator captures or redirects stones and other debris, preventing them from becoming safety hazards while allowing the blades to maintain high-speed cutting performance
4Device complexity
If cutting elements are used without guide surface, then device complexity is reduced, but stubble distribution and breakdown are insufficient
Solution Approach 1:
The cutting element is segmented into distinct functional surfaces: a cutting edge for cutting stalks and a guide surface for directing stubble. This segmentation allows each surface to perform its specific function optimally, improving stubble distribution without significantly increasing overall device complexity
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
This configuration enhances stubble distribution, reduces dust, and facilitates easier breakdown by microorganisms, eliminating the need for additional stubble passes and minimizing operational hazards.
Implementation Method 1
The guide surface conveys the air, the biomass and other spatial bodies that are detected by the guide surface towards the axis of rotation of the rotating cutting element
Implementation Method 2
The air transported inwards by the rotating guide surfaces, the biomass and the other spatial bodies which have been transported inwards by the guide surface of a cutting element cannot therefore deviate upwards from the center of the interior. The material located in the bell or the cage can thus only get out of the interior space downwards.
Data Source
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AI summary
The invention relates to an attachment for harvesting stalky stem crops, comprising a conveying device and a device (8) for cutting stalks, which device is arranged in a plane below the conveying device and has at least one cutting element (10), which rotationally circulates in a horizontal or at least approximately horizontal plane. In order to avoid the disadvantageous effects known from the prior art as much as possible, according to the invention, the cutting element (10) has a guiding surface (12) on the outer edge of the cutting element, which guiding surface extends downward from the blade plane (14), the guiding surface (12) being set inward by a setting angle (15) in the direction of rotation (R) of the cutting element (10).