Coupling driving mechanism

The invention belongs to the technical field of robots, and particularly relates to a coupling driving mechanism. The coupling driving mechanism comprises two driving motors, first screws (3), secondscrews (8), planetary rollers (9) and lead screws (4). First inner rotors (10) in the first driving motor are fixedly connected with the first screws (3). Second inner rotors (5) in the second drivingmotor are fixedly connected with the second screws (8). The first screws (3) and the second screws (8) are engaged with the two ends of the planetary rollers (9) correspondingly. The planetary rollers (9) are engaged with the lead screws (4) through threads. The lead screws (4) are fixedly connected with telescopic rods (6) of the motors. According to the coupling driving mechanism, the problem that due to the limitation to the power ratio density of a single electric cylinder, the single electric cylinder cannot be used in the field of high speed and large load is solved; and the coupling driving mechanism is especia