Commercial vehicle EMB drive-by-wire mechanical braking system actuator with redundant motor

The invention discloses a commercial vehicle EMB drive-by-wire mechanical braking system actuator with a redundant motor, and relates to the technical field of vehicle engineering. On the premise of meeting the redundant requirement of the motor, the motor is simple in mechanical structure, small in size and high in universality. A piston assembly in the actuator of the EMB drive-by-wire mechanical brake system is connected with a brake block; the power mechanism comprises a first motor and a second motor; the second motor comprises a stator and a rotor; the transmission mechanism comprises a first lead screw, a first nut, a first roller and a second roller; the first lead screw, the first nut and the first pin roller jointly form a first planetary pin roller lead screw pair; the first lead screw is connected with the output end of a first motor. A push rod is arranged on the first nut and connected with a pressure arm, and the pressure arm pushes a brake block of the disc brake to move through a piston assem