Hydraulic Attachment Pressure Sensing for Stable Contact Control
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Solution Overview
Problem
Existing working machines rely on operator experience to maintain work attachments at a suitable attitude and pressure during operations, leading to inefficiencies and potential damage due to improper contact with objects.
Innovation Solution
Incorporation of rod-side and bottom-side pressure detectors and a controller to calculate and maintain the appropriate contact state and attitude of work attachments by adjusting hydraulic cylinder extension and retraction, using a display for guidance and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If work attachment is brought into contact with ground surface or object, then work function is enabled (leveling, cleaning, crushing), but contact pressure cannot be controlled to suitable degree, leading to inefficiency or damage
Solution Approach 1:
The system uses pressure detectors to monitor hydraulic pressure in real-time and feeds this information back to the controller, which then adjusts hydraulic cylinder extension/retraction to maintain optimal contact pressure between the work attachment and the ground or object, enabling automated control of contact state
Solution Approach 2:
The patent replaces manual operator judgment and mechanical contact control with an automated system using pressure detectors, controllers, and hydraulic actuators that sense pressure conditions and automatically adjust attachment position to maintain optimal contact
2Manufacturing precision
If operator manually controls work attachment contact, then flexibility is maintained, but consistency and precision of contact pressure are reduced
Solution Approach 1:
The system enables the work machine to automatically regulate its own operation by using pressure detectors to sense contact conditions and the controller to autonomously adjust hydraulic cylinder extension/retraction, eliminating the need for constant manual intervention while maintaining precise contact pressure
Solution Approach 2:
The controller continuously receives pressure feedback from detectors and automatically adjusts hydraulic pressure to maintain optimal contact conditions, providing consistent and precise control without requiring complex manual operations
3Productivity
If work attachment contact pressure is increased, then work effectiveness improves, but risk of damage and energy loss increases
Solution Approach 1:
The system dynamically adjusts contact pressure based on real-time detection of work conditions and attachment state, automatically optimizing the balance between work effectiveness and energy consumption by maintaining only the necessary contact pressure for effective operation
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 consistent and efficient operation of work attachments by maintaining the desired contact pressure and attitude, reducing operator dependence and preventing damage.
Implementation Method 1
a rod-side pressure detector to detect a rod-side hydraulic pressure which is a pressure of hydraulic fluid in communication with the rod-side fluid chamber of the at least one hydraulic cylinder
Implementation Method 2
a bottom-side pressure detector to detect a bottom-side hydraulic pressure which is a pressure of hydraulic fluid in communication with the bottom-side fluid chamber of the at least one hydraulic cylinder
Implementation Method 3
at least one hydraulic cylinder extendable and retractable to move the work attachment connected to the at least one support member, the at least one hydraulic cylinder including a rod-side fluid chamber and a bottom-side fluid chamber separated by a piston
Data Source
AI summary
A working machine includes: at least one support member connectable to a work attachment to do work by making contact with an object to be contacted; at least one hydraulic cylinder to move the work attachment connected to the at least one support member, a rod-side pressure detector to detect a rod-side hydraulic pressure of hydraulic fluid in communication with a rod-side fluid chamber of the at least one hydraulic cylinder; a bottom-side pressure detector to detect a bottom-side hydraulic pressure of hydraulic fluid in communication with a bottom-side fluid chamber of the at least one hydraulic cylinder; and a controller to calculate a relationship in pressure between the rod-side hydraulic pressure and the bottom-side hydraulic pressure and evaluate, based on the calculated relationship in pressure, a contact state which is a state of contact of the work attachment with the object.