Adjustable Chopping Unit Roller Shafts for Crop Mat Control
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Solution Overview
Problem
Existing chopping units for agricultural harvesting machines have limited options for influencing the division of the harvested crop mat height into portions above and below the chopping drum's central point, which affects throughput and chopping quality.
Innovation Solution
The rotary shafts of the lower press roller and transport roller can be displaced vertically and horizontally relative to the chopping drum, allowing active adjustment of the mat height division and thus influencing throughput and chopping quality, with optional displacement of the stripper device, counter-cutting device, and stops to optimize these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the roller pair arrangement is fixed relative to the chopping drum, then the structure is simple and stable, but the ability to influence mat height division and control throughput is limited
Solution Approach 1:
The patent applies the dynamics principle by making the roller pairs adjustable relative to the chopping drum. The first roller pair can be positioned at different distances from the chopping drum, and the second roller pair can be positioned at different distances from the first roller pair. This dynamic adjustment capability allows the system to adapt to different crop types and desired throughput rates, resolving the contradiction between adaptability and structural simplicity.
2Productivity
If the mat height is increased to improve throughput, then more crops can be processed simultaneously, but the chopping quality deteriorates due to insufficient compression
Solution Approach 1:
The system uses dynamic adjustment of roller positions to optimize the balance between throughput and chopping quality. By independently adjusting the first and second roller pairs, the system can increase mat height for higher throughput while maintaining adequate compression through the counter-cutting device, thereby resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
The patent applies parameter changes by allowing continuous adjustment of the distances between roller pairs and the chopping drum. This enables optimization of the compression parameters and mat height division to achieve both high throughput and high chopping quality simultaneously, as the system can adapt parameters to match desired performance characteristics.
3Manufacturing precision
If the mat height is decreased to improve chopping quality, then better compression is achieved, but the throughput is reduced
Solution Approach 1:
The dynamic roller adjustment system allows the operator to decrease mat height for improved chopping quality when needed, while maintaining the capability to increase throughput by adjusting roller positions. The system resolves the contradiction by providing flexibility to optimize parameters based on specific operational requirements rather than being fixed at a single configuration.
4Adaptability or versatility
If the counter-cutting device is fixed relative to the chopping drum, then the structure is simple, but the ability to optimize chopping quality for different crop types is limited
Solution Approach 1:
The counter-cutting device is made dynamically adjustable relative to the chopping drum, allowing optimization of chopping quality for different crop types. This dynamic capability resolves the contradiction by providing adaptability through a controlled adjustment mechanism rather than a fixed simple structure.
Data Source
AI summary
Chopping unit (5) of an agricultural harvesting machine (1), having a chopping drum (10) bearing chopping knives, a first roller pair (11) consisting of an upper and a lower press roller (15) and (16) positioned upstream of the chopping drum (10), at least one second roller pair (12) consisting of a pre-compression roller (13) and a transport roller (14) positioned upstream of the first roller pair (11), a counter-cutting device (18) cooperating with the chopping drum (10) and a stripper device (19) cooperating with the lower press roller (16), arranged between the lower press roller (16) and the chopping drum (10), wherein a rotary shaft (20) of the lower press roller (16) and/or a rotary shaft (21) of the transport roller (14) can be displaced in its relative position to a rotary shaft (17) of the chopping drum (10) at least in the vertical direction.