Rock Trap Mechanism for Combine Header Debris Management
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Solution Overview
Problem
Combine harvesters face damage from rocks and debris entering the threshing mechanism, leading to costly repairs and inefficiencies in existing rock trap systems, especially with belt-type crop conveyors.
Innovation Solution
A rock trap system integrated with a combine header and feeder adapter, featuring a transverse conveyor belt and a trap door mechanism that collects rocks in an open area forward of the conveyor belt and rearward of the sickle bar, with a hydraulic motor for selective opening to dispense rocks, providing a cost-effective and reliable solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex detection systems and automatic dumping mechanisms are installed in the feeder housing, then rock protection is improved, but device complexity and cost increase significantly
Solution Approach 1:
The invention extracts the rock trap function from the complex feeder housing location and relocates it to the header assembly where rocks are first encountered. This separates the rock collection function from the crop conveyance system, allowing simpler mechanics without complex detection systems. The trap door mechanism is integrated directly into the header structure rather than requiring elaborate electronic detection and automatic dumping mechanisms.
Solution Approach 2:
Instead of using complex electronic detection systems to automatically detect and dump rocks, the invention uses a simpler mechanical approach where the trap door is manually or mechanically opened when rocks are present. The inversion is in using basic mechanical principles rather than advanced electronic systems to achieve the same rock protection function.
2Reliability
If rock traps are located in the feeder housing or at the beater entrance, then rock damage prevention is improved, but interference with crop delivery increases
Solution Approach 1:
The invention segments the header assembly into distinct functional zones: a rock trap area for collecting debris, a crop conveyance area for transporting cut crop, and a threshing area for processing. By spatially separating these functions, the rock trap does not interfere with crop delivery while still providing effective protection. The trap door mechanism is positioned to dump rocks without obstructing the crop flow path.
3Device complexity
If simple dam structures are mounted on the header, then device complexity is reduced, but interference with crop delivery from the sickle bar occurs
Solution Approach 1:
The invention applies local quality by creating a specific rock trap zone with appropriate structural characteristics only where needed for rock collection, while maintaining open and clear pathways in other areas for crop conveyance. The trap door mechanism is locally positioned and sized to handle rocks without creating broad interference with the overall crop delivery system.
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
The system effectively collects and dispenses rocks without interfering with crop delivery, reducing damage to the combine unit and minimizing the risk of costly repairs, while being simpler and less prone to failure compared to complex detection systems.
Implementation Method 1
A rock trap system integrated with a combine header and feeder adapter, featuring a transverse conveyor belt and a trap door mechanism that collects rocks in an open area forward of the conveyor belt and rearward of the sickle bar, with a hydraulic motor for selective opening to dispense rocks
Implementation Method 2
a trap door mechanism that collects rocks in an open area forward of the conveyor belt and rearward of the sickle bar, with a hydraulic motor for selective opening to dispense rocks
Data Source
AI summary
A rock trap disposed in a feeder adapter of a combine directly behind a sickle bar of a combine header and in an area in front of a rearwardly directed conveyor located for receiving cut crop from transversely directed conveyor of the header. The rock trap has a trap door which can be selectively opened so as to drop beneath the header rocks collected therein.