When a certain torque is applied to the output shaft, the worm will generate axial displacement in addition to rotation, which will drive the crank and make the striker produce angular displacement; when the torque on the output shaft increases to the set torque, the crank drives the cam The top-moving micro-switch acts to cut off the motor control and drive power to stop the motor, and at the same time send out an over-torque alarm signal, so as to realize the control, protection and alarm of the output torque of the electric actuator, and achieve the purpose of protecting the electric valve.
