Actuating device with controllable stroke

Abstract

The invention relates to an actuating device with controllable stroke, which comprises a stepping motor and a control system thereof, a position feedback mechanism consisting of a Hall element and a permanent magnet, and an actuating mechanism consisting of a rotating module and a translation module. The actuating device performs conversion of motion through a lead screw pair, uses the Hall element and the permanent magnet as the position feedback mechanism to perform stroke and position detection as well as signal feedback, solves the technical problems that the prior stroke control mechanismhas a complicated structure and the prior position control mechanism has poor antijamming ability, has the advantages of small volume, large starting moment, simple structure, good positioning consistency, accurate stroke and position control, high efficiency, dust prevention and long service life, and particularly can be applied to the electric control of 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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