Agricultural Piston Press Telescopic Cam Track Control
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Solution Overview
Problem
Existing agricultural piston press systems face issues with cam track contamination and wear, leading to reduced sealing effectiveness and increased hydraulic system demands due to frequent pressure changes in the cam track controls.
Innovation Solution
The implementation of a telescoping gear member and a retaining device with a telescoping coupling element allows for precise and low-wear switching between different cam tracks, utilizing a hydraulic control and regulation system to manage pre-stroke and filling strokes efficiently, reducing mechanical complexity and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cam track controls are used to switch between different conveying paths, then the packer tines can be controlled to follow different trajectories, but the cam tracks are extremely susceptible to contamination and wear which significantly affects the shape of the cam tracks
Solution Approach 1:
The patent replaces the mechanical cam track control system with a hydraulic control system. The hydraulic cylinder actuates the packer tines through fluid pressure, eliminating the exposed mechanical cam tracks that are susceptible to contamination and wear. This substitution maintains the ability to control different trajectories while removing the reliability issues of the mechanical system.
Solution Approach 2:
The patent introduces a hydraulic cylinder with pressure chambers to control the packer tines. By using hydraulic fluid pressure to actuate the tines through different trajectories, the system achieves reliable control without exposed mechanical cam tracks. The hydraulic system is enclosed and less susceptible to environmental contamination compared to external cam tracks.
2Speed
If hydraulic cylinder is used to control packer tines switching between cam tracks, then rapid switching is enabled, but the lifting cylinder must be pressurized and relieved of pressure at extremely short time intervals which places extreme demands on the resilience of the hydraulic system
Solution Approach 1:
The patent employs a dynamic control mechanism where the hydraulic cylinder's pressure chambers are selectively pressurized based on the required trajectory. The system dynamically switches between different pressure chamber configurations to achieve rapid packer tine movement without requiring extreme pressure cycling. This dynamic approach reduces the resilience demands on the hydraulic system while maintaining fast switching capability.
3Speed
If multiple pressure chambers are pressurized alternately for rapid switching, then fast trajectory change is achieved, but large-volume and expensive pump systems are required to provide high pressure oil flows
Solution Approach 1:
The patent uses a hydraulic regulator that controls the pressurization of pressure chambers in a regulated manner. Instead of requiring all chambers to be fully pressurized simultaneously or cycling through extreme pressure levels, the system applies partial pressurization as needed. This regulated approach achieves rapid trajectory switching while reducing the overall hydraulic fluid volume requirements and eliminating the need for large-volume expensive pump systems.
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 solution ensures high functional reliability and low wear of components, achieving rapid and precise switching between cam track paths while minimizing hydraulic system demands and maintaining effective crop pre-compaction.
Implementation Method 1
the lifting cylinder must be pressurized and relieved of pressure at extremely short time intervals in order to switch between the various cam tracks of the packer tines
Data Source
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AI summary
The device has an oscillating press piston (3) in a press channel (2), a feed channel (15) with crank controlled overhung tines (13) and a gathering transmission (30) between the crank drive and overhung tines (13) with at least one telescopic transmission element (29). The at least one telescopic transmission element causes the movement of the overhung tines and a retaining device (44) is associated with the transmission.