Wheel drive system, in particular for an aircraft

An aircraft comprising:

• a wheel;
• a landing gear strut;
• and
• at least one wheel drive system for ground movement of the aircraft, each of the at least one wheel drive system including:
• a motor system supported by an unsuspended part of the landing gear strut, the motor system including:
• an electric motor, and
• a reduction gearing system, and
• a clutch system, which connects an output shaft of the electric motor to the wheel via the reduction gearing system, the clutch system including:
• a dog-clutch including a drive part, which is secured to the motor system, and a receiving part, which is secured to a rim of the wheel, and
• a translational movement system, which translationally moves the drive part along an axis of an axle crossbeam of the landing gear strut into an engaged position, in which the drive part collaborates with the receiving part, and a disengaged position, in which the drive part is separated from the receiving part,
• wherein the receiving part includes an annular corolla, which is fixed on one side of the rim of the wheel, and a plurality of shock absorbers fixed to the annular corolla and spaced apart so as to leave a square-edged slot between each adjacent pair of the shock absorbers, and
• wherein each of the shock absorbers fixed to the annular corolla is arranged circumferentially between radial stop portions extending radially towards each other.