Shaker Drum Drive With Eccentric Oscillation for Compact Harvesting
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Solution Overview
Problem
Existing harvesting machines with planetary gear systems for rotating and oscillating shaker drums are cumbersome, complex, and prone to mechanical stress, which can lead to wear and deterioration.
Innovation Solution
A harvesting unit with a simplified shaker system where the shaker drums are driven in rotation and oscillation using compact mechanisms, including an eccentric module and a mechanical member that transforms eccentric rotation into drum oscillation, enhancing resistance to mechanical constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a planetary gear system is used to rotate and oscillate shaker drums, then the drum can be driven in both rotation and oscillation, but the mechanism becomes cumbersome, complex, and requires a lot of space
Solution Approach 1:
The patent divides the drum driving mechanism into two independent parts: a rotational driving device and an oscillating driving device. Each device performs one specific function, eliminating the need for a complex planetary gear system that attempted to combine both functions in a single mechanism. This segmentation simplifies the overall structure while maintaining the ability to rotate and oscillate the drum.
Solution Approach 2:
The patent combines the rotational and oscillating driving devices at the same level, both connected to the drum shaft independently. This merging of simple mechanisms achieves the combined effect of rotation and oscillation without the complexity of nested planetary gears, reducing spatial requirements and mechanical complexity.
2Adaptability or versatility
If a planetary gear system is used to drive shaker drums, then the drum can be steered in rotation and oscillation, but the mechanism is prone to mechanical stress and wear
Solution Approach 1:
By separating the rotational and oscillating functions into independent driving devices, each mechanism experiences only its designated type of stress rather than combined stresses. This reduces mechanical wear and improves reliability compared to the planetary gear system where multiple gears experienced complex combined loading.
Solution Approach 2:
The patent introduces an intermediary oscillating driving device that converts rotational motion from the oscillating motor into oscillating motion of the drum shaft through an eccentric mechanism. This intermediary mechanism protects the main rotational driving system from oscillatory stresses, improving overall mechanical reliability.
3Adaptability or versatility
If a planetary gear system with multiple components is used, then the drum can be driven in oscillation, but the mechanism requires a lot of space on the machine
Solution Approach 1:
The patent extracts the oscillation function from the complex planetary gear system and implements it through a simple oscillating motor with an eccentric mechanism. This extraction eliminates the need for multiple planetary gears, carriers, and associated components, dramatically reducing the volume required for the oscillating mechanism.
Solution Approach 2:
The patent uses a simplified eccentric mechanism that copies the oscillation function previously achieved by complex planetary gear arrangements. This copying approach achieves the same functional result with minimal components, reducing spatial requirements while maintaining oscillation capability.
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 solution provides a more compact, efficient, and durable harvesting unit that effectively detaches crops from plants while minimizing mechanical stress and wear, thus improving harvesting efficiency and machine longevity.
Implementation Method 1
at least one eccentric module and a driving device engaged with said module to steer its rotation, said module being connected to the drum shaft by a mechanical member arranged to transform the eccentric rotation of said module into an oscillation of said drum shaft
Data Source
AI summary
A harvesting unit including a chassis intended to be moved along rows of plants to be harvested, and a shaker system including a shaker device including: a drum operable to detach a crop from the plants, the drum including a drum shaft mounted for rotation on the chassis about a vertical axis and shaker organs mounted to the drum shaft; a rotational driving mechanism for the drum including a driven body and a first driving device engaged with the driven body to steer its rotation about the vertical axis; an oscillatory driving mechanism for the drum about the vertical axis including comprising an eccentric module and a second driving device engaged with the eccentric module to steer its rotation, the eccentric module being connected to the drum shaft by a mechanical member arranged to transform the eccentric rotation of the eccentric module into an oscillation of the drum shaft.