Combine Concave Frame Assembly With Angled Bars for Better Threshing
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Solution Overview
Problem
Conventional concave bars and separation grates in combine harvesters are not optimized for maximum threshing and separation efficiency, leading to inefficient harvesting and wasted crop material.
Innovation Solution
The concave bars and separation grates are configured with angled surfaces and structures to maximize threshing surface area and separation capacity, utilizing angled concave bars and interchangeable finger-like configurations to enhance threshing and separation operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional concave bars and separation grates are used, then the structure is simple, but threshing efficiency and separation capacity are insufficient
Solution Approach 1:
The concave bar is designed with different surface characteristics in different regions: a threshing surface with angled bars for effective threshing, and a separation surface with spaced bars for grain separation. This local differentiation allows each region to perform its specific function optimally, resolving the contradiction between maintaining simple structure and achieving high threshing efficiency and separation capacity.
Solution Approach 2:
The single concave bar assembly performs multiple functions: threshing crop material through the angled bar surface, separating grain from chaff through the spaced bar surface, and directing material flow through its geometric configuration. This multi-functionality eliminates the need for separate threshing and separation components, maintaining structural simplicity while achieving both high threshing efficiency and separation capacity.
2Productivity
If conventional separation grates are used, then the structure is simple, but separation capacity is insufficient
Solution Approach 1:
The separation grate is designed with fingers having different characteristics in different regions: upper fingers with greater spacing for initial separation, and lower fingers with different spacing for final grain release. This local differentiation allows each region to perform its specific separation function optimally, achieving high separation capacity without requiring complex multi-component systems.
Solution Approach 2:
The separation grate fingers are arranged in a three-dimensional configuration with varying spacing at different heights and positions. This spatial arrangement creates multiple separation zones within a single component, effectively increasing separation capacity by utilizing vertical and horizontal dimensions rather than relying on multiple stacked grates.
3Area of moving object
If conventional concave configurations are used, then manufacturing is simple, but threshing surface area is insufficient
Solution Approach 1:
The concave bar is manufactured with specific geometric parameters: bars angled at 30-45 degrees relative to the horizontal plane, with controlled spacing and dimensions. These parameter optimizations maximize the effective threshing surface area and crop contact without requiring complex manufacturing processes, achieving large threshing surface area through optimized geometry rather than complex structure.
4Loss of time
If conventional threshing configurations are used, then processing time is long, but crop material waste increases
Solution Approach 1:
The angled bars on the concave bar are positioned and dimensioned to perform preliminary threshing action on crop material as it enters the threshing zone. This preliminary action begins the separation process earlier, reducing total processing time and ensuring that grain is separated from chaff before material is discharged, thereby minimizing crop waste while accelerating processing.
Data Source
AI summary
A threshing concave frame assembly for crop separating operations in a combine harvester is disclosed. In one exemplary embodiment, the concave frame includes a first side member and a second side member opposing each other, wherein the first and second side members each have an interior surface and exterior surface. In addition, a crop threshing bar member is disposed between the interior surface of the first side and second side members of the concave frame. In particular, the crop threshing bar member includes a first end and a second end, wherein the first and second ends are secured to the interior surface of the first and second side members of the concave frame.