Servo pressure control unit for drive-by-wire operation

The servo pressure control unit comprises a motor, a piston, an oil path block and a cylinder body, a shell of the motor is fixedly connected to the oil path block, an output shaft of the motor drives a spiral transmission mechanism in a rotating mode through a planetary gear transmission mechanism, a through hole is formed in an oil path, and the piston is arranged in the through hole in a sliding mode. A cylinder body with an inner cavity is installed at the end, away from the motor, of the manifold block in a sealed mode, the inner cavity communicates with the through hole, the spiral transmission mechanism is in transmission connection with the piston and drives the piston to move in the through hole, a rotating bearing is arranged at the end, close to the motor, of the spiral transmission mechanism, and an inner ring of the rotating bearing is connected with the spiral transmission mechanism. An outer ring of the cylinder body is fixedly connected to one end of the oil path block, and an oil inlet hole a