Aircraft turbomachine comprising an electric machine

Aircraft turbomachine extending along a longitudinal axis of axial direction and comprising:

• a fixed stator,
• a turbine shaft extending along the longitudinal axis up to a rear end of the turbomachine and being capable of rotating about the longitudinal axis relative to the stator,
• an electric machine arranged at the rear of the turbine shaft and comprising an electric machine stator attached to the stator and an electric machine rotor coaxial with the electric machine stator about an electric machine axis of axial direction and capable of rotating relative to the electric machine stator about said electric machine axis,
• a coupling carriage mounted rotationally fixed with the electric machine rotor about the electric machine axis and capable of moving in translation relative to the electric machine rotor in the axial direction between a coupled position and an uncoupled position,
• coupling members, one carried by a rear end of the turbine shaft, the other carried by the coupling carriage, the coupling members being designed to engage with one another after the coupling carriage has moved from the uncoupled position to the coupled position and to transmit a torque from the turbine shaft to the electric machine rotor and/or vice versa, when the coupling members are engaged with one another,
• an elastic return member mounted between the coupling carriage and the electric machine rotor and designed to elastically return the coupling carriage in translation in the axial direction to the coupled position, and
• an actuator designed to drive the coupling carriage in translation from the coupled position to the uncoupled position, the actuator comprising a movable part and a fixed part relative to which the movable part is capable of moving in translation in the axial direction, and wherein the movable part of the actuator is designed to drive the coupling carriage in translation from the coupled position to the uncoupled position, when the movable part itself moves in translation from a first engaged position to a second engaged position, and the movable part of the actuator being designed to move in translation relative to the fixed part from a first disengaged position wherein the movable part and the coupling carriage are free to move relative to one another, to the first engaged position, when the coupling carriage occupies the coupled position.