Propulsion unit comprising a transmission system, several electric motors and at least one remote coupling system, aircraft comprising at least one such propulsion unit

A propulsion assembly comprising:

• a propulsion system,
• electric motors, and
• a transmission system that is configured to couple the electric motors to the propulsion system,
• each electric motor comprising:
• a first face oriented toward the transmission system,
• a second face facing away from the transmission system, and
• an output shaft,
• the propulsion assembly comprising, for at least one electric motor:
• a first coupling system that is configured to assume a coupled state in which the output shaft of the electric motor is rotationally coupled to the transmission system and an uncoupled state in which the output shaft of the electric motor is not coupled to the transmission system;
• wherein the output shaft and the first coupling system are located at the second face of the electric motor, the output shaft having a free end that protrudes beyond the second face and is remote from the second face, the first coupling system being located within a portion of the output shaft projecting beyond the second face, in a vicinity of the free end of the output shaft,
• wherein the propulsion assembly comprises at least one coupling shaft, which connects the output shaft of the electric motor to the transmission system, and has a first end that is configured to be rotationally coupled to the output shaft by way of the first coupling system and a second end that is rotationally coupled to the transmission system by way of a second coupling system,
• wherein the output shaft is hollow and extends from the first face to the second face, and
• wherein the coupling shaft is housed in the hollow output shaft such that the coupling shaft extends beyond the first face and beyond the second face.