Propulsion system provided with a locking device, such as a parking brake

A propulsion system for a mobility apparatus, comprising:

• a casing comprising a motor space;
• an electric motor that is housed in the motor space, said electric motor comprising a stator fastened inside the motor space and a rotor rigidly mounted on a primary shaft for rotation therewith, the primary shaft being guided in rotation about an axis, relative to the casing, with a plurality of bearings, the plurality of bearings comprising at least a first bearing and a second bearing, the first bearing and the second bearing being respectively positioned axially on either side of the rotor, none of the bearings of the plurality of bearings being positioned axially between the first bearing and the second bearing;
• and
• a locking gear that is rigidly connected to the primary shaft for rotation therewith about the axis, said locking gear being capable of and intended for interacting with a locking mechanism that is arranged to adopt a locked state in which said locking mechanism interacts with the locking gear so as to prevent the locking gear from rotating about the axis, said locking gear being positioned axially between the first bearing and the second bearing.