Stroke-controllable actuating device

Abstract

The invention relates to a stroke-controllable actuating device which comprises a stepper motor, a control system of the stepper motor, a position feedback mechanism and an actuating mechanism. The position feedback mechanism comprises hall elements and permanent magnets, and the actuating mechanism comprises a rotating assembly and a translating assembly. Movement is converted by a lead screw pair, the position feedback mechanism comprising the hall elements and the permanent magnets is used for detecting the stroke and the position and feeding signals, technical problems of complicated structure of an existing stroke control mechanism and poor anti-interference capacity of an existing position control mechanism are solved, and the stroke-controllable actuating device has the advantages of small size, high starting torque and efficiency, simple structure, good positioning consistency, capability of precisely controlling the stroke and the position, dust prevention and long service life, and is particularly applicable to electric control for various hydraulic valves.

Description

technical field [0001] The invention relates to a stroke-controllable actuator. Background technique [0002] Existing translation actuators, such as CNC machine tools, manipulators, valve controllers, etc., have complex structures in order to ensure the smooth execution of the control system. Although they bring high-precision control effects, the complex structure brings cost increase and decrease in reliability. In addition, in order to ensure the controllability and high precision of the stroke, a position sensor such as a photoelectric sensor must be used for positioning and counting, but this type of sensor is easily interfered by external signals or power signals, resulting in misoperation or wrong counting. [0003] In addition, the most common hydraulic valve control is the pilot hydraulic control system: it uses the control handle to control a small electromagnetic hydraulic valve, and uses the hydraulic oil passing through the small electromagnetic valve to push ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an actuator with simple structure, which can accurately and reliably control stroke and position, which solves the technical problems of complex structure of existing stroke control mechanism and poor anti-interference ability of position control mechanism, and at the same time solves the problem of existing The structure of the hydraulic valve control device is complex, the oil pipe of the solenoid valve is easily blocked, the installation position is limited, the push-pull stroke needs to be adjusted frequently, the gear is easy to be disengaged, the operation is inconvenient, the valve core and oil seal are easily damaged, and the labor intensity is high.

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