Brushless hollow cup motor

A brushless hollow cup motor, comprising:

• a housing comprising a first cover plate, a second cover plate, and a hollow housing body sandwiched between the first cover plate and the second cover plate;
• a rotor assembly supported in the housing and rotatably connected to the housing, wherein two ends of the rotor assembly are supported on the first cover plate and the second cover plate, respectively, and rotatably connected to the first cover plate and the second cover plate, respectively;
• a stator assembly fixed in the housing, the stator assembly being fixed to an inner peripheral side of the housing body and spaced around an outer peripheral side of the rotor assembly;
• a first bearing;
• and
• a second bearing;
• wherein the first bearing is a ball bearing, and the second bearing is an oil bearing;
• a side of the first cover plate close to the housing body is recessed to form a first groove, and a side of the second cover plate close to the housing body is recessed to form a second groove coaxially provided with the first groove;
• an outer peripheral side of the first bearing is fixed in the first groove, and an outer peripheral side of the second bearing is fixed in the second groove;
• the two ends of the rotor assembly are inserted and fixed to an inner peripheral side of the first bearing and an inner peripheral side of the second bearing, respectively.