Electric Actuator

Abstract

The invention relates to the field of actuating mechanisms and provides an electric actuator. The electric actuator comprises a shell body and a gear device and a driving motor which are arranged inside the shell body and a transmission shaft connection device arranged on the shell body, wherein the gear device comprises a transmission gear component, the output end of the driving motor drives thetransmission shaft connection device to rotate through the transmission gear component, the transmission shaft connection device comprises an output shaft connection seat connected to the tail end portion of the gear device and driven to rotate by the gear device and an output shaft connector fixed on the output shaft connection seat, the output shaft connector comprises a ring body, a square transmission shaft is positioned and arranged inside the ring body in a penetrating manner, and a shaft sleeve is arranged between the inner side wall of the ring body and the square transmission shaft.According to the electric actuator, the shaft sleeve is added on the square transmission shaft and the output shaft connector, when the square transmission shaft is fixed, the shaft sleeve wraps the square transmission shaft tightly, the center of the square transmission shaft can be guaranteed to be coincident with the center position of the output shaft connector, and waggling of the actuator inrunning is reduced.

Description

technical field [0001] The invention relates to the field of actuators, in particular to an electric actuator. Background technique [0002] Electric actuators, also known as electrical executing fittings, are commonly used valve drives in industrial automatic control systems. They are widely used in petrochemical, natural gas, metallurgy, electric power, papermaking, steel, cement, municipal environmental protection and other industries. Process automatic control system to meet the increasing automation control needs of industrial production. The electric actuator is used to connect the valve body. The electric actuator uses the motor as the driving source, and uses the DC current as the control and feedback signal. When the upper instrument or computer sends out the control signal, the electric actuator moves in proportion to the signal size and passes through the output shaft. Make the valve or damper open to the corresponding opening degree, and feed back the system ope...

AI Technical Summary

Problems solved by technology

At present, the above-mentioned cam cannot be adjusted and is relatively fixed after installation, so the angle when the micro-switch is touched after assembly cannot be adjusted, and the two micro-switches of the above-mentioned electric actuator correspond to the complete closing of the damper (ie 0°). It is in two states with the damper fully open (that is, 90°); it lacks the shutdown feedback when the damper opening angle is between 0 and 90°, so it can only be stopped in time by manually using external equipment to observe the damper angle, which is very inconvenient

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