Integrated planetary roller screw electric cylinder with large transmission ratio

The invention discloses an integrated large-transmission-ratio planetary roller screw electric cylinder, which belongs to the technical field of electric cylinders, and comprises a gear box body, a bearing seat arranged on the right side of the gear box body, a cylinder body arranged on the right side of the bearing seat, a driving device arranged in the gear box body, and an execution device arranged in the cylinder body, the execution device penetrates through the bearing seat and then is connected with the driving device. The stator of the servo motor is connected with the gear box body, and the rotor of the servo motor is connected with the inner gear ring, so that the size of the electric cylinder is obviously reduced, the electric cylinder has the flattening characteristic, and the bearing capacity, the maximum speed and the axial rigidity are improved; planetary transmission is adopted, so that the intermediate transmission link is reduced, and synchronous axial movement and revolution of the transmiss