Electro-hydraulic linkage actuating mechanism

The utility model relates to a pneumatic actuator capable of being used on a valve and opening or closing the valve, and discloses an electro-hydraulic linkage actuating mechanism. The scheme includes that the electro-hydraulic linkage actuating mechanism is characterized by comprising a motor, an oil tank, an oil cylinder and a control and actuating device, the control and actuating device consists of an oil way manifold block, a hydraulic lock, a pressure regulating valve and an electromagnetic reversing valve, a coupler, a one-way gear pump and a high-pressure oil filter are sequentially arranged in the oil tank, an output shaft of the motor is connected onto the coupler, the coupler is connected with the one-way gear pump, and one end of the high-pressure oil filter is connected onto the one-way gear pump while the other end of the high-pressure oil filter is disposed on the inner lateral wall of the oil tank. By the aid of the scheme, the electro-hydraulic linkage actuating mechanism overcomes shortcomin