Chuck Finger Servo Valve Control for Precise Grip Positioning
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Solution Overview
Problem
The existing chuck device has limited adjustable movement of gripping members, making precise positioning difficult and requiring complex manual adjustments, while also lacking the ability to control the open or closed state using electrical signals.
Innovation Solution
A drive system comprising a controller, a detection sensor to monitor the piston's axial position, and a servo valve that controls the fluid supply to the chuck device, allowing precise control of the piston's displacement and the opening/closing of the fingers through electrical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual rotation of the end member is used to adjust the gripping position, then the adjustable amount of movement of the gripping members is limited to the movable distance of the end member, but the adjustment work becomes complicated and high precision positioning is difficult to achieve
Solution Approach 1:
The patent replaces the manual mechanical rotation of the end member with an automated control system comprising a controller, detection sensor, and switching valve. The controller automatically controls the switching valve to supply or exhaust fluid based on detected piston position, eliminating manual rotation operations while achieving precise positioning through automated feedback control.
Solution Approach 2:
The system implements self-adjustment through the detection sensor that automatically detects the piston's axial position and feeds this information to the controller, which then automatically adjusts the fluid supply state. This eliminates the need for operator intervention in the adjustment process, making the system self-regulating and highly precise.
2Adaptability or versatility
If the end member is rotated to adjust the gripping position, then the axial position of the end member can be adjusted, but the adjustment work is complicated and time-consuming
Solution Approach 1:
The patent replaces the time-consuming manual rotation mechanism with an automated fluid control system. The switching valve, controlled by the controller based on sensor feedback, can rapidly adjust the piston position by controlling fluid supply and exhaust, dramatically reducing adjustment time while maintaining full adaptability of gripping position adjustment.
Solution Approach 2:
The system uses periodic detection and control cycles where the detection sensor continuously monitors the piston position, and the controller periodically adjusts the switching valve state to achieve the desired gripping position. This automated periodic control enables rapid adaptation without manual intervention.
3Extent of automation
If a fixed switching valve state is used for fluid supply, then the system is simple, but the ability to control the open or closed state of the gripping members using electrical signals is lost
Solution Approach 1:
The patent replaces the fixed mechanical switching valve configuration with an electrically controllable switching valve system. The valve responds to electrical control signals from the controller, enabling automated control of the gripping members' open or closed state while maintaining relatively simple hardware through the use of standard electro-pneumatic components.
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
Enables the gripping members to be stopped at any position with high precision and ease, improving upon the limitations of the existing chuck device by simplifying adjustments and allowing for remote control of the open or closed state.
Implementation Method 1
a piston (20) displaceable in an axial direction under an effect of supply of fluid
Implementation Method 2
a detection sensor (32) configured to detect an axial position of the piston (20)
Implementation Method 3
a switching valve (14) configured to switch a state of supply of the fluid to the chuck device (12), wherein the switching valve is a servo valve, of which degree of valve opening is controllable based on a control signal input from the controller (16)
Data Source
AI summary
A drive system for driving a chuck device including a piston and a pair of fingers to be opened and closed according to the displacement of the piston, includes a controller, a detection sensor to detect an axial position of the piston, and three-port servo valves to switch a state of supply of the fluid to the chuck device. A degree of valve opening is controllable based on a control signal input from the controller, and an amount of displacement of the piston and an amount of opening and closing of the fingers are controlled by changing the degree of valve opening. One of the 3-port servo valves is connected to a first cylinder chamber of the chuck device, and another of the 3-port servo valves is connected to a second cylinder chamber of the chuck device.