Modular Grain Pan with Detachable Members
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Solution Overview
Problem
Conventional grain pans in combine harvesters suffer from fatigue and deformation due to high cycle loads, leading to grain leaks and the need for complete replacement, which results in product loss and operational inefficiencies.
Innovation Solution
A modular grain pan system comprising detachable, self-supporting grain pan members with a closed grain contacting surface and snap connection mechanism, allowing for custom sizing and easy replacement of individual members, reducing fatigue and eliminating gaps between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional welded steel grain pan is used, then the grain pan provides structural support and conveys crop, but it suffers from fatigue and deformation due to high cycle loads, leading to frequent failures and grain leaks
Solution Approach 1:
The grain pan is divided into multiple detachable grain pan members that can be independently replaced. Each member is connected to adjacent members and to the frame via detachable connections, allowing individual members to be replaced without replacing the entire grain pan assembly, thus improving reliability and reducing downtime.
Solution Approach 2:
The grain pan members are designed with specific geometric parameters including a bottom surface, side surfaces, and a grain contacting surface. The cross-sectional shape and dimensional relationships are optimized to provide structural strength while reducing weight and improving fatigue resistance compared to conventional welded steel construction.
2Loss of substance
If a conventional welded grain pan with thin steel plate is used, then the grain pan can be manufactured simply, but gaps form between the grain pan and side beams due to deformation, causing grain leaks and product loss
Solution Approach 1:
The grain pan is segmented into multiple members with detachable connections to the frame and side beams. This segmentation allows for precise fitting and eliminates gaps between the grain pan and supporting structures, preventing grain leaks while maintaining manufacturing simplicity.
Solution Approach 2:
Instead of trying to prevent deformation in a continuous welded structure, the invention inverts the approach by using detachable connections that accommodate dimensional changes while maintaining tight fits. The modular design allows each member to be precisely fitted to eliminate gaps without requiring the entire structure to remain perfectly rigid.
3Productivity
If the entire grain pan is replaced upon failure, then structural integrity is restored, but operational efficiency decreases due to complete replacement requirements and increased downtime
Solution Approach 1:
The grain pan is divided into multiple detachable members that can be independently replaced. When a member fails or shows signs of fatigue, only that specific member needs to be removed and replaced, rather than replacing the entire grain pan assembly. This significantly reduces replacement time and maintains operational efficiency.
Solution Approach 2:
The detachable connection system allows for easy removal and replacement of individual grain pan members. Failed members can be quickly discarded and replaced with new or refurbished members, minimizing downtime. The modular design enables efficient recovery and reuse of functional members.
4Ease of repair
If a modular grain pan system with detachable members is used, then maintenance time is reduced and individual members can be replaced, but the device complexity increases due to multiple connection elements
Solution Approach 1:
The grain pan is segmented into standardizable members with detachable connections. While this increases modularity, the connections are designed to be simple and repeatable, using standardized components that reduce overall complexity. Each member can be independently maintained or replaced without affecting the entire system.
Solution Approach 2:
The detachable connection system serves multiple functions: it allows for easy assembly and disassembly, enables individual member replacement, facilitates maintenance, and allows for different member configurations. This multi-functionality justifies the added complexity by providing numerous operational benefits.
Data Source
AI summary
A grain pan for a combine harvester comprises a plurality of grain pan members with a closed surface grain contacting surface adapted to engage the harvested crop. More than one of the grain pan members are grain pan members comprising a first connection element and a second connection element, the first connection element being adapted to effectuate a detachable connection with the second connection element of another grain pan body member and vice versa. The grain pan members are detachably connected to each other, one behind the other via their respective first and second connection elements, in a direction substantially parallel to the main direction of grain transportation.