Differential drive

A differential drive with an externally variable controllable locking coupling, comprising:

• a housing;
• a drivable differential carrier rotatably supported in the housing;
• two output shafts;
• output gears arranged coaxially and rotatable relative to the differential carrier, and nonrotatably connectable to their respective output shafts;
• differential gears rotatably held in the differential carrier so as to simultaneously engage the output gears;
• a friction assembly including alternating inner plates nonrotatably connected to a first of the coaxially positioned output gears, and outer plates nonrotatably connected to another of the coaxially positioned output gears or differential carrier and axially supported on a supporting face of a first of the coaxially positioned parts;
• actuating means;
• and
• a pressure plate, the actuating means and the pressure plate being provided so as to load the rotating discs, the actuating means including a pressure ring provided so as to be nonrotatable relative to the housing, but axially movable towards the friction assembly, an actuating ring provided to be rotatable relative to the pressure ring, constrained axially but with means for axially displacing the pressure ring, and rotary drive means for driving the actuating ring.