Patent ID: 8633630

Claim:
A permanent magnet rotor of a motor, comprising: a) a rotor core; and b) permanent magnets; wherein: the rotor core comprises a central core, a plurality of sectional cores, and a connecting mechanism; the sectional cores are integrated with the central core via the connecting mechanism to form a whole iron core; grooves are formed between each sectional core and the central core and the permanent magnets are embedded in the grooves; the grooves and the permanent magnets are distributed in the radial direction and the grooves are evenly distributed along the circumference of the rotor; the central core comprises an annular central seat and a plurality of fixed core blocks extending therefrom; a cavity is formed between two adjacent fixed core blocks; each sectional core is embedded in the cavity; a rotating shaft of the motor is coupled with the annular central seat via a damping device; the damping device comprises pins and a shock ring; the rotating shaft is sheathed with an inner core and the inner core is embedded in the bore inside the annular central seat; a gap is formed between the inner core and the annular central seat; on the outer surface of the inner core and at the corresponding position on the inner wall of the bore are disposed with a plurality of recesses; the shock ring is embedded in the gap and the recesses; and the shock ring in the recesses is disposed with bores, and the pins are embedded in the bores.