Gearless elevator drive system and elevator system comprising a gearless elevator drive system

A gearless elevator drive system (5, 5a, 5b) comprising:

• a rotatable shaft (12) extending in an axial direction (A) between a first end (12a) and a second end (12b) of the shaft (12);
• an electric motor (9) provided at a side adjacent to the first end (12a) of the shaft (12) and coupled to the shaft (12) for rotatably driving the shaft (12);
• at least one tension member coupling portion (46;
• 46a, 46b) provided at a side adjacent to the second end (12b) of the shaft (12) and configured for coupling the shaft (12) with a tension member (3;
• 3a, 3b) that is provided for suspending and driving an elevator car (6);
• a brake disc (48) provided at the shaft (12) between the electric motor (9) and the at least one tension member coupling portion (46;
• 46a, 46b) and configured for rotating concurrently with the shaft (12);
• and
• at least one brake actuator (50a, 50b) comprising at least one brake shoe (52a, 52b) and configured for selectively urging the at least one brake shoe (52a, 52b) against the brake disc (48) for braking the brake disc (48);
• wherein, when viewed along the axial direction (A), the at least one brake actuator (50a, 50b) is arranged at a side adjacent to the second end (12b) of the shaft (12), and
• wherein the at least one brake actuator (50a, 50b) is arranged radially outside of the at least one tension member coupling portion (46;
• 46a, 46b).