Combine Harvester Threshing Bar Attachment Stability

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing combine harvester threshers are complex and costly to maintain, requiring multiple configurations for different crops, and current attachment methods often result in threshing bars shifting or detaching during use, leading to inefficient grain separation and increased grain loss.

Innovation Solution

The design of a threshing drum with securely attached threshing bars featuring a wedge-shaped leading edge and rasp structure, including alternating grooves and vanes, which are bolted to the drum using a two-point coordination system to prevent shifting and ensure effective crop threshing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional attachment methods are used for threshing bars, then the thresher can be assembled quickly, but the threshing bars shift or detach during use, leading to inefficient grain separation and increased grain loss

Engineering Contradiction:

Improveattachment stabilityVSAvoidgrain separation efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The attachment system is divided into multiple fastening points (first and second fasteners positioned at different locations on the threshing bar), providing segmented securement that prevents shifting and detachment while maintaining assembly efficiency

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The thresher is pre-configured with properly positioned and secured threshing bars before operation begins, ensuring optimal grain separation efficiency is maintained throughout the threshing process without interruptions due to bar displacement

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If multiple thresher configurations are maintained for different crops, then each crop can be threshed optimally, but the cost and complexity of maintaining multiple combine harvesters increases substantially

Engineering Contradiction:

Improvecrop-specific threshing capabilityVSAvoidnumber of combine harvesters required

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The thresher allows dynamic reconfiguration by enabling farmers to change threshing bar configurations between crops, providing adaptability for different crop types without requiring multiple dedicated machines, thus reducing overall fleet complexity

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A single combine harvester is designed to handle multiple crop types through configurable threshing bars, making the machine universal rather than specialized, which eliminates the need to maintain separate harvesters for different crops

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If aggressive threshing is applied to all crops, then grain separation is more effective, but seed damage and over-threshing increase

Engineering Contradiction:

Improvegrain separation effectivenessVSAvoidseed damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Different threshing bar configurations with varying characteristics (spacing, shape, material) are applied to match specific crop requirements, providing locally optimized threshing intensity that achieves effective grain separation without causing seed damage

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11641806B1Threshing bars and combine harvester thresher formed therewith

Publication Date: 2023.05.09 KILE RONALD J

AI summary

A combine harvester threshing drum threshing bar includes a threshing fixture including a leading edge, an opposed trailing end, a top threshing side, including a trailing threshing face that extends between the trailing end and the corner and a leading threshing that inclines downwardly from the corner to the leading edge to form a wedge in the threshing fixture, an opposed bottom threshing drum emplacement side, a first bore and a second bore. The first bore includes a first hole open to trailing threshing face that enlarges a second hole open to the threshing drum emplacement side. The second bore includes a third hole open to leading threshing face that enlarges a second hole open to the threshing drum emplacement side.