Corn Header Drive Layout With Single Shaft and Stepped Gearbox
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Solution Overview
Problem
Conventional corn pickers require separate drive trains for picking and chopping units, leading to high costs, weight, and space requirements, and complicating the attachment to a base unit and the use of different widths.
Innovation Solution
A corn picker design with a single drive shaft for both picking and chopping units, utilizing a stepped transmission with a gearbox in a side wall and remotely controllable gear ratios, allowing simultaneous operation with minimal space and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate drive trains are used for picking and chopping units, then different speed ratios can be achieved, but cost, weight, and space requirements increase significantly
Solution Approach 1:
The patent combines the drive trains for picking and chopping units into a single integrated system. A single drive shaft replaces two separate drive shafts, and a unified transmission unit with a common gearbox provides power to both picking rollers and chopping units. This merging maintains the ability to achieve different speed ratios while significantly reducing structural complexity, cost, weight, and space requirements.
Solution Approach 2:
The transmission unit is designed with multi-functionality, where a single gearbox and drive shaft system serves both picking and chopping operations. The universal drive system can selectively power different units and adjust speed ratios for various operational requirements, eliminating the need for separate dedicated drive trains for each function.
2Adaptability or versatility
If two separate drive connections are provided at opposite ends, then picking and chopping can be driven separately, but coupling to the base unit becomes difficult and accommodates only fixed widths
Solution Approach 1:
The patent merges the two separate drive connections into a single unified drive connection point. The consolidated drive shaft and transmission unit allow the corn picker to be coupled to the base unit at one location, simplifying attachment procedures and enabling the use of different width corn pickers on the same base unit while maintaining operational independence of picking and chopping functions.
3Adaptability or versatility
If a stepped gearbox with multiple gear pairs is used, then different speed ratios are achieved, but installation space increases
Solution Approach 1:
The patent employs a compact stepped gearbox design where gear pairs are nested or arranged in a space-efficient configuration. The transmission unit integrates multiple gear stages within a minimized footprint, allowing different speed ratios to be achieved without proportionally increasing the installation space. The gearbox is designed to fit within constrained spaces while providing multiple gear ratio options for varied operational needs.
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
Enables efficient, space-saving, and cost-effective operation of picking and chopping units, facilitating attachment to various base units and accommodating different widths without additional components.
Implementation Method 1
a gear unit (21) arranged in a side wall (14) of the corn picker and comprising a drive shaft (26) connected to the first and second main shafts (33, 46)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A corn picker comprises at least one row unit, wherein the row unit includes a picking unit in which two picking rollers define a picking gap, and a chopping unit arranged below the picking unit to chop a stalk drawn through the picking gap, and a drive unit comprising a first main shaft for driving the at least one picking unit and a second main shaft for driving the at least one chopping unit. The drive unit (21) is arranged in a side wall of the corn picker (1) and comprises a drive shaft (26) connected to the first and second main shafts (46, 33) and running in a common vertical plane with the first and second main shafts (46, 33).