SELF-PROPELLED DEVICE

A self-propelled device (1), comprising: [0002] a cutting assembly (10) for cutting; [0003] a body (20) for supporting the cutting assembly; and [0004] a traveling system (30) for driving the body to move; [0005] wherein the traveling system comprises at least: [0006] a traveling wheel (301); and [0007] a wheel hub motor (302) integrally disposed in the traveling wheel; [0008] wherein a radial length (D) of the wheel hub motor is greater than or equal to 18 cm and less than or equal to 33 cm; and [0009] an axial thickness (d) of the wheel hub motor is less than or equal to 3.5 cm.