Pumpkin Harvester Gravity Flow and Segmented Threshing
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Solution Overview
Problem
Existing pumpkin harvest machines are bulky, uneconomical, and inefficient in separating pumpkin pulp from seeds, often requiring multiple funding devices and significant installation space, which limits their capacity and makes them unsuitable for large-scale cultivation.
Innovation Solution
The machine arranges the processing steps to minimize funding devices and space requirements, using gravity to transition the pumpkin from the spiked roller to the crusher and then to the threshers, with a first thresher promoting harvest in both directions and a second thresher arranged longitudinally to increase flow capacity and reduce machine width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple conveyors are used to transport pumpkins through processing stations, then the machine can process pumpkins, but the machine becomes bulky and limits throughput capacity
Solution Approach 1:
The patent combines multiple processing functions into a single integrated unit. The crusher, first thresher, and second threshers are arranged in a compact configuration where the output of one station feeds directly into the next without requiring separate conveyor systems between them. This merging of functions reduces the number of conveyors while maintaining high throughput capacity.
Solution Approach 2:
The processing stations are arranged at different heights and orientations to utilize gravity for material flow. The first thresher conveys crop to both ends, and the second threshers are positioned to receive material directly, creating a gravity-assisted flow path that eliminates the need for additional conveyors and reduces overall machine complexity.
2Productivity
If a self-propelled combine harvester style is used, then the machine can harvest pumpkins, but it becomes large and bulky making it uneconomical
Solution Approach 1:
The patent divides the harvesting function into separate modular components: a spiked roller for picking up pumpkins, a crusher for chopping, and threshers for separation. These segmented functions are arranged in a compact vertical configuration rather than a horizontal spread-out layout, reducing the overall machine volume while maintaining harvesting capability.
Solution Approach 2:
The patent transitions from a horizontal arrangement of processing stations to a vertical stacking arrangement. The crusher, first thresher, and second threshers are positioned in a vertical sequence, utilizing the vertical dimension to reduce the horizontal footprint and overall machine volume while maintaining all necessary processing functions.
3Manufacturing precision
If conventional threshing arrangements are used, then seeds can be separated from pulp, but the hard parts of pumpkin skins hinder separation and reduce efficiency
Solution Approach 1:
The patent incorporates a crusher stage before the threshing process to预先 chop and soften the pumpkin skins and hard parts. This preliminary action breaks down the problematic hard structures before they reach the threshers, preventing them from hindering separation and improving both separation quality and efficiency.
Solution Approach 2:
The patent uses a scraper plate in the crusher to remove and extract the hard parts and skin fragments from the pumpkin material. This extraction of problematic components before threshing ensures that only the softer, separation-friendly material proceeds to the threshers, improving separation efficiency.
4Adaptability or versatility
If the machine is designed as a standalone unit, then it can perform all functions, but it requires significant installation space and drive power
Solution Approach 1:
The patent merges multiple processing functions into a single compact attachment unit that can be connected to a tractor. The crusher, first thresher, and second threshers are integrated into one assembly that utilizes the tractor's PTO for power, eliminating the need for separate drive systems and reducing overall installation space requirements.
Solution Approach 2:
The patent uses the tractor's PTO (power take-off) as an intermediary power source to drive the processing stations. This external power source eliminates the need for large on-board engines or multiple drive systems, reducing the machine's self-contained volume and installation space requirements while maintaining full functional 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
This configuration allows for high-speed harvesting with minimal construction volume and weight, making the machine suitable for attachment to a tractor and enabling efficient separation of pumpkin pulp and seeds.
Implementation Method 1
The pumpkins roll by gravity over the stripping plate, which is inclined towards the crusher, taking the shortest possible route to the crusher where they are crushed.
Implementation Method 2
The crop flow is divided, chopped, and directed to both ends. The harvested crop (pulp, skin fragments, and seeds) also falls onto the auger conveyor below, which also operates in both directions.
Implementation Method 3
The Archimedean spirals at the end of the second rotors convey the husk fragments to the ejection point.
Data Source
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AI summary
A pumpkin harvesting machine is proposed, comprising a spiked roller (1) for receiving the harvested crop, a crusher (2) for crushing the harvested crop, at least one thresher for subsequently separating the harvested crop into fruit parts and seeds, and for feeding the seeds to a grain tank. The crusher (2) contains a knife roller (15) enclosed in a housing (16), the axis of which is parallel to the axis of the spiked roller (1). A scraper plate (14) extends from this housing (16) directly between the spikes of the spiked roller (1). A first thresher (4) is arranged directly below the crusher (2) and parallel to its axis. Second threshers (5) are arranged longitudinally on both sides, their inlets (22) being located below the outlets of the first thresher (4) on both sides, and outlet openings (28) at their other ends.Above each of the two second threshers (5) at least one secondary thresher (7) is arranged, and below the two second threshers (5) a trough (33) for collecting harvested crop is arranged, as well as a first conveying device (6) for conveying the harvested crop from the trough (33) to the secondary thresher (7).