The application relates to the technical field of electro-hydraulic actuators, and discloses a self-driven double-variable electro-hydraulic
actuator which comprises a cylinder body, a plurality of plungers, a shell, a power
assembly and a
variable displacement assembly. The plurality of plungers are arranged on the cylinder body at equal intervals in the circumferential direction. The middle part of the shell is rotationally connected with a main shaft, the cylinder body is sleeved on the main shaft and is fixedly connected with the main shaft. The power
assembly comprises a power piece. A gap is arranged between the outer side wall of the cylinder body and the inner side wall of the shell, the power piece is arranged in the gap, the cylinder body is rotated through the power piece, and the power piece is cooled through the movement of the plungers. The
variable displacement assembly comprises an adjusting plate and an adjusting piece. The adjusting plate is arranged on the main shaft, the plurality of plungers are arranged in contact with the adjusting plate respectively, the adjusting piece is arranged on the shell, the driving end of the adjusting piece extends into the shell and is connected with the adjusting plate, and the adjusting plate and the power piece are respectively used for adjusting the displacement of the plungers. The application improves the heat dissipation capacity and greatly improves the
survivability of the electro-hydraulic
actuator through the double-variable mode.