Seeding Machine Pneumatic Actuator for Uniform Seed Depth
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Solution Overview
Problem
Existing seeding machines face issues with linear mechanical counter-pressure springs that lack constant force adjustment, leading to uneven seed placement and premature wear due to oscillations and vibrations, while pneumatic counter-pressure systems fail to provide independent pressure control, resulting in inconsistent seeding depth and soil compaction.
Innovation Solution
A pneumatic actuator with an internal guide is integrated into each seeding unit, connected to an air pressure regulation system and control system, allowing for constant, adjustable, and independent pressure control, absorbing terrain irregularities and reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If linear mechanical counter-pressure springs are used, then the structure is simple and easy to manufacture, but the force varies with displacement causing uneven seed placement and oscillations
Solution Approach 1:
The patent replaces linear mechanical springs with pneumatic counter-pressure systems (bellows or air cushions) that can provide constant adjustable force. The pneumatic system uses compressed air to generate counter-pressure force that remains constant regardless of displacement, eliminating the force variation problem of mechanical springs while maintaining structural simplicity.
Solution Approach 2:
The patent changes the physical state from mechanical elastic force to pneumatic pressure force. By using adjustable pneumatic pressure, the system can maintain constant force over the operating range, and the force can be adjusted by changing air pressure parameters, thereby achieving uniform seed placement.
2Ease of manufacture
If linear mechanical counter-pressure springs are used, then the structure is simple, but oscillations and vibrations cause premature wear of components
Solution Approach 1:
The pneumatic counter-pressure system provides damping characteristics that reduce oscillations and vibrations. The compressibility of air in the bellows or air cushions acts as a shock absorber, reducing the transmission of vibrations to mechanical components, thereby extending their service life while keeping the structure simple.
3Force
If pneumatic counter-pressure systems with parallel air cushions are used, then constant adjustable force is achieved, but independent pressure control for each seeding unit is lost
Solution Approach 1:
The patent divides the pneumatic system into independent segments, with each seeding unit having its own pneumatic bellows or air cushion connected to the common air supply through individual channels. This segmentation allows each unit to be independently controlled and adjusted, while still benefiting from the constant force characteristic of pneumatic systems.
4Manufacturing precision
If gauge wheel load is increased to ensure seeding depth, then depth uniformity improves, but soil over-compaction occurs
Solution Approach 1:
The patent changes from mechanical load control to pneumatic pressure control. The pneumatic system can precisely control the gauge wheel load by adjusting air pressure, maintaining consistent force that ensures uniform seeding depth without excessive load that would cause soil compaction. The adjustable nature of pneumatic pressure allows optimization of the force level.
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 uniform seed placement and depth across varying terrain, preventing soil over-compaction and mechanical wear, with improved seed spacing and reduced vibrations.
Implementation Method 1
pneumatic counter-pressure systems that utilizes rubber air cushions with in-line air inlets associated with the duty cycle of the air compressor assembly
Implementation Method 2
pneumatic counter-pressure cushions... absorbing terrain irregularities and reducing vibrations
Data Source
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AI summary
A seeding machine (1), which contains a structural frame (30), where on its lateral side it is connected through a coupling plate (40) to at least one deformable parallelogram (21) belonging to a seeding body. It includes at least one air channel (29), connected at one end to an air compensating tank (28) and at the other distal end to a pneumatic actuator with an internal guide (11), integrally arranged through a set (1) of fastening means and positioned within said at least one deformable parallelogram (21). This pneumatic actuator with an internal guide (11) is operatively connected to a pneumatic air pressure regulation system (31), controlled by a monitoring and control system (39).