Dual motor drive system for actuator

A drive system for an actuator, the drive system comprising:

• first and second motors;
• first and second input shafts connected to be driven by the respective first and second motors, each of the first and second input shafts comprising:
• a first overrunning clutch configured to rotate with the input shaft in a first direction;
• and
• a second overrunning clutch configured to rotate with the input shaft in a second direction;
• a first drive gear configured to be driven alternatively by one of the first overrunning clutches, the other of the first overrunning clutches, or both of the first overrunning clutches together;
• a second drive gear configured to be driven alternatively by one of the second overrunning clutches, the other of the second overrunning clutches, or both of the second overrunning clutches together;
• an output shaft;
• and
• an output clutch associated with the output shaft, wherein the output clutch and output shaft are arranged to be driven by the first drive gear in a first mode of operation of the drive system and be driven by the second drive gear in a second mode of operation of the drive system;
• wherein the output shaft defines an axis of rotation (Z), and the output clutch comprises a driven clutch part connected to the output shaft and first and second driving clutch parts which are axially moveable into and out of engagement with the driven clutch part;
• wherein the first and second drive gears are each positioned adjacent to a respective one of the first and second driving clutch parts, each of the first and second drive gears and driving clutch parts comprise a plurality of ramp elements, and a plurality of rolling elements are positioned between the ramp elements of adjacent ones of the first and second drive gears and driving clutch parts.