This utility model relates to the field of electric
actuator technology, and particularly to an electric
actuator with automatic overload protection. It includes a valve body, a sliding hole bracket vertically fixed to one side of the valve body's outer wall, and a perforated plate horizontally fixed to the top of the
valve stem at the upper part of the valve body. A positioning cylinder is vertically fixed to the top surface of the perforated plate. An electric
actuator body is vertically mounted on the upper side of the valve body and slidably assembled on the sliding hole bracket. A rod cylinder is vertically mounted at the bottom of the output end of the electric actuator body and is fitted into the positioning cylinder for limiting. This utility model avoids the problem of
impact force being converted into torque on the
valve stem. Large torque transmitted to the electric actuator motor can easily damage the motor and affect its service life, thus improving the service life of the electric actuator motor.