Miniature integrated high-reduction-ratio power device integrated within miniature outer rotor

A miniature high-reduction-ratio power device integrated within an outer rotor, comprising a motor rotor (1), a rotor permanent magnet (2), a stator winding (3), a stator core (4), an internal fixing casing (5), an end cover (20) and a straight end cover opening (9);

• wherein the internal fixing casing (5) is fixedly connected with the end cover (20), the motor rotor (1) is rotatably connected with the internal fixing casing (5), the motor rotor (1) is provided with a rotor output shaft (7), a primary sun gear (12) is fixedly connected with the rotor output shaft (7) through a first D-shaped shaft hole, a plurality of primary planetary gears (10) are meshed outside the primary sun gear (12) in an encircling manner, and a primary planetary gear carrier (13) is rotatably connected with the plurality of primary planetary gears (10), a secondary sun gear (17) is fixedly connected with an output shaft of the primary planetary gear carrier (13) through a second D-shaped shaft hole, a plurality of secondary planetary gears (11) are meshed outside the secondary sun gear (17) in an encircling manner, a secondary planetary gear carrier (15) is rotatably connected with the plurality of secondary planetary gears (11), a tertiary sun gear (18) is fixedly connected with an output shaft of the secondary planetary gear carrier (15) through a third D-shaped shaft hole, and a plurality of tertiary planetary gears (19) are meshed outside the tertiary sun gear (18) in an encircling manner, a tertiary planetary carrier (16) is rotatably connected with the plurality of tertiary planetary gears (19), and the tertiary planetary carrier (16) is provided with a planetary reducer output shaft (21).