Over torque device of electric actuator

Abstract

The invention provides an over torque device of an electric actuator. The over torque device comprises a bracket, spring seats, springs, micro-switches, a cam and guide shafts, and further comprises a torque adjusting shaft, wherein the spring seats are symmetrically arranged on the two sides of the lower end of the bracket; the guide shaft sleeves into the middle lower end of the cam; the two ends of the guide shafts sleeve into the spring seats on the two sides respectively; the springs sleeve the guide shafts on the two sides of the cam; the corresponding spring seat sleeves one end of each spring and the lower end of the cam is convexly arranged at the lower end of the bracket; a thread end of the torque adjusting shaft is screwed into a bolt hole in the upper end of the cam; the two micro-switches are fixed on the two sides of the upper end of the bracket, are located above the torque adjusting shaft and are close to the two ends of the torque adjusting shaft; the cam is subjected to the force effect to do left and right reciprocating motion. The over torque device of the electric actuator has the beneficial effects that the over torque device can be used on a plurality of models of electric actuators by replacing the wire diameters of the springs; the aim that the power is cut off when the torque of the electric actuator is too great is realized by not moving the micro-switches and moving the torque adjusting shaft.

Description

[0001] technical field [0002] The invention belongs to the field of valve electric actuators, in particular to an electric actuator over-torque device. Background technique [0003] For the electric actuator with automatic over-torque function, the over-torque device is an indispensable and important part. The over-torque devices on the market are relatively cumbersome and costly. This kind of operation is inefficient and takes up more space. , and it is not convenient for daily maintenance; at the same time, there is a tension spring at the bottom of the micro switch mounting plate to ensure the reset function of the micro switch, but sometimes due to the inaccurate reset position of the micro switch, it will affect the transmission of the next signal; at the same time, an over torque The device is only applicable to a single type of electric actuator, which reduces the utilization of the over-torque device. Contents of the invention [0004] The purpose of the pr...

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Problems solved by technology

[0003] For the electric actuator with automatic over-torque function, the over-torque device is an indispensable and important part. The over-torque devices on the market are relatively cumbersome and costly. This kind of operation is inefficient and takes up more space. , and it is not convenient for daily maintenance; at the same time, there is a tension spring at the bottom of the micro switch mounting plate to ensure the reset function of the micro switch, but sometimes due to the inaccurate reset position of the micro switch, it will affect the transmission of the next signal; at the same time, an over torque The device is only suitable for a single type of electric actuator, which reduces the utilization of the over-torque device

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