Moveable Chaff Pan Locking Assembly for Raised and Lowered Positions
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Solution Overview
Problem
Existing agricultural combines lack a cost-effective and convenient mechanism for locking a chaff pan in both raised and lowered positions to efficiently direct chaff to either a spreader/chopper or windrow it on the ground, respectively.
Innovation Solution
A chaff pan assembly with a moveable locking member connected to a stationary bracket via a linkage, allowing the chaff pan to be locked in either position, guided by a linkage that maintains its movement and distributes weight efficiently, and includes a locking mechanism to prevent unwanted pivoting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a locking mechanism is added to hold the chaff pan in raised or lowered positions, then the functionality and operational efficiency are improved, but the device complexity increases
Solution Approach 1:
The locking member is spring-loaded and automatically engages with the linkage arm when the chaff pan reaches the desired position (raised or lowered). The system uses the chaff pan's own movement and weight to trigger the locking action, eliminating the need for external actuators or complex control systems. The spring provides automatic return to the unlocked position when manually actuated.
Solution Approach 2:
A locking member serves as an intermediary element between the chaff pan linkage and the stationary bracket. This simple mechanical intermediary provides the locking function without requiring direct integration of complex locking mechanisms into the main structure. The locking member translates the chaff pan's positional changes into engagement/disengagement actions with the linkage arm.
2Adaptability or versatility
If the chaff pan is made moveable between raised and lowered positions, then the operational flexibility is improved, but the weight distribution on the cleaning section increases
Solution Approach 1:
The chaff pan assembly is segmented into movable components (chaff pan, linkage, locking member) that are separately mounted on the stationary bracket. This segmentation allows the heavy chaff pan to be moved independently while distributing the mounting loads through the linkage structure to the stationary bracket, reducing the weight burden on the cleaning section.
Solution Approach 2:
The chaff pan is designed with dynamic positioning capability, allowing it to move between raised and lowered positions as needed for different operational modes. The linkage mechanism provides controlled movement while the locking member maintains stable positions when locked, optimizing the balance between movement capability and weight distribution.
Data Source
AI summary
A chaff pan assembly for an agricultural vehicle includes a chaff pan that is moveable between raised and lowered positions. A stationary bracket is mounted to a fixed point on the agricultural vehicle. A linkage interconnects the chaff pan to the stationary bracket and guides movement of the chaff pan between the raised and lowered positions. A locking member is moveably connected to the stationary bracket and is moveable between a locked position, in which the locking member is engaged with one arm of the linkage to prevent movement of the one arm of the linkage, and an unlocked position, in which the locking member is disengaged from the one arm of the linkage to permit movement of the one arm of the linkage.