Precision Seeder Sowing Disc With Idle Bell for Fast Replacement
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Solution Overview
Problem
Existing sowing elements for precision agricultural seeders face challenges in maintaining sowing precision and speed due to complex disc replacement processes, interference with rotational speed control, and suboptimal tube positioning, leading to inefficiencies in seed distribution.
Innovation Solution
A sowing element design featuring a bell idly supported on the seed selection disc, allowing easy disc replacement and maintaining rotational precision through frictional contact, with a separate pressurization system and optimized tube placement for improved seed distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bell is fixed to the box-shaped body and the disc is coupled to the bell, then the disc rotation is driven by the bell, but the disc replacement becomes complicated and requires dismounting the bell and repositioning screws
Solution Approach 1:
The device is segmented into independent functional modules: the bell remains fixed to the box-shaped body while the disc is made independently replaceable. The disc is detached from the bell coupling mechanism, allowing it to be removed and replaced without affecting the bell or requiring screw repositioning, thus simplifying the replacement procedure.
Solution Approach 2:
The disc is extracted from the coupled system with the bell. Instead of being mechanically linked to the bell, the disc is now independently mounted on the box-shaped body, allowing it to be taken out and replaced separately without disturbing the bell structure or requiring complex reassembly.
2Ease of operation
If the bell is temporarily locked or decelerated to allow disc replacement, then disc access is enabled, but the correct rotation of the sowing disc is not ensured
Solution Approach 1:
The drive system is segmented so that the bell (fixed to the body) and the disc (independently mounted) are separate components. This allows the disc to be accessed and replaced without locking or decelerating the bell, ensuring the bell's rotational function remains uninterrupted and precise.
Solution Approach 2:
The disc is extracted from the bell coupling, eliminating the need to lock or decelerate the bell for disc access. The disc can be independently removed and replaced while the bell continues to rotate correctly, maintaining rotation precision without interference.
3Ease of repair
If the chamber containing the seed and the feeding tank are emptied every time work is done on the disc, then disc maintenance is possible, but operational efficiency is reduced
Solution Approach 1:
The seed storage system is segmented into the chamber and tank, which are made independently accessible. The disc can be maintained without emptying the chamber or tank, as the disc replacement procedure no longer requires access to these components. This segmentation allows maintenance work to proceed without disrupting seed storage, thereby maintaining operational efficiency.
4Ease of manufacture
If the positioning of air aspiration tubes is not optimized, then the connection to the pneumatic vacuum generator is simplified, but seed distribution precision is compromised
Solution Approach 1:
The air aspiration tubes are positioned with optimized local characteristics at critical locations. The tubes are strategically placed to ensure precise seed distribution while maintaining a relatively simple overall connection structure to the pneumatic vacuum generator, balancing manufacturing simplicity with distribution precision.
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
Ensures precise and efficient seed distribution with simplified disc replacement and reduced mechanical interference, enhancing operational efficiency and flexibility in seed type changes.
Implementation Method 1
a face of the disc is pressurised (positively or negatively with respect to the ambient pressure) with respect to the other face by means of a bell that is applied to the selection disc so as to jointly rotate therewith and defines therewith a chamber in which there is established the negative pressure
Implementation Method 2
The dragging effect between the bell and the sowing disc is in fact not essential, but is however ensured by the condition of contact between the bell and the disc, owing to the friction of the respective contact surfaces
Data Source
AI summary
Sowing element for precision agricultural seeders comprising a device for selecting the seed, of the type which is formed of a perforated disc having opposing faces that are subject to a pressure differential and a pressurisation device associated with the disc for applying the pressure differential to the faces of the disc, the pressurisation device including a pressurisation bell combined with the disc so as to pneumatically couple thereto in order to guarantee said pressure differential, wherein the bell is rotatably idle with respect to the disc.