Hydraulic Soil Working Device With Piston-Position Depth Reset
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Solution Overview
Problem
Existing soil tillage equipment is prone to errors in working depth adjustments due to improper positioning of the primary piston, leading to distorted depth settings.
Innovation Solution
A soil tillage device with a hydraulic system that includes a valve system to control fluid connections to the primary and floating pistons, allowing precise adjustment and lifting of tillage tools, using electro-hydraulic valves for remote control and minimizing operator errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the hydraulic cylinder is supplied with pressurized hydraulic fluid to move the floating piston toward the primary piston for working depth adjustment, then the working depth can be adjusted, but the primary piston chamber must be emptied sufficiently to avoid distortion of the working depth setting
Solution Approach 1:
The valve system is designed to automatically empty the primary piston chamber of hydraulic fluid before working depth adjustment begins. This preliminary action ensures the primary piston is in the zero position, preventing distortion of the working depth setting. The control unit activates the valve system to release hydraulic fluid from the primary piston chamber to the tank line before allowing floating piston movement.
2Adaptability or versatility
If the same tractor hydraulic control unit is used for both working depth adjustment and lifting functions, then the remaining hydraulic control units can be used for other functions, but the risk of incorrect working depth settings increases
Solution Approach 1:
The control unit is designed to automatically control the valve system to empty the primary piston chamber before working depth adjustment. This feedback mechanism ensures that the primary piston is always in the correct zero position before adjustment begins, preventing operator error and ensuring reliable working depth settings even when using the same hydraulic control unit for multiple functions.
3Measurement precision
If the primary piston is not in the zero position when adjusting working depth, then the working depth adjustment is distorted due to inadvertent filling of the primary piston chamber, but ensuring the primary piston is in the zero position requires additional hydraulic control
Solution Approach 1:
The valve system automatically performs the function of emptying the primary piston chamber and positioning the primary piston in the zero position without requiring manual intervention. The control unit activates the valve system, which uses the existing hydraulic pressure to drain the primary piston chamber to the tank line, allowing the system to self-correct and prepare for accurate working depth adjustment.
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 ensures accurate working depth settings by forcing the floating piston to a zero position before adjustment, reducing the risk of incorrect depth adjustments and enabling simultaneous control of depth and lifting functions.
Implementation Method 1
the hydraulic cylinder is currently supplied with pressurized hydraulic fluid in such a way that the floating piston is moved toward the primary piston
Implementation Method 2
by introducing pressurized hydraulic fluid into the pressure line an extension of the primary piston can be effected
Data Source
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AI summary
The invention relates to a soil cultivation implement (10) with a chassis (16) comprising a hydraulic lifting device (24) and at least one wheel (18), and a machine frame (12) connected to the chassis (16) to which several soil cultivation tools (20a-20h, 22a-22h) are attached, wherein the wheel (18) of the chassis (16) and the machine frame (12) are movable relative to each other via the hydraulic lifting device (24) of the chassis (16), wherein the lifting device (24) comprises a hydraulic system (32) with a pressure line (34), a discharge line (38), a hydraulic cylinder (26) having a primary piston (52) and a floating piston (56), a valve system (44) and a valve control unit (66).