MOTOR

摘要

The motor comprises a rotary unit, a stationary unit disposed around the rotary unit, and a bearing mechanism. The rotary unit comprises a plurality of magnets, a rotor core, a resin portion which covers the plurality of magnets and the rotor core. The rotor core comprises a ring-shaped inner core portion disposed at a radially inner side of the plurality of magnets, an outer core portion, and a plurality of connecting portions which radially connects the plurality of core elements, which are disposed between the plurality of magnets, and the inner core portion. The resin portion comprises an upper resin portion and a lower resin portion. The upper resin portion includes a plurality of gate holes. The lower resin portion is disposed at a more radially inner side than the plurality of outer core elements, and further comprises a first core support mark which exposes a part of the bottom surface of the rotor core, and a second core support mark disposed in the outer core part, and exposes a part of the bottom surface of the rotor core.

主权项

1. A motor, comprising:
a rotary unit which rotates on a vertical center axis; a stationary unit which is disposed around the rotary unit; and a bearing mechanism which rotatably supports the rotary unit relative to the stationary unit, wherein the rotary unit comprises: a plurality of magnets arranged in a circumferential direction; a rotor core provided with a plurality of magnetic steel plates laminated in an axial direction; and a resin portion covering the plurality of magnets and the rotor core, when seen from above, a radial length of each of the plurality of magnets is longer than its circumferential length, the rotor core comprises: a ring-shaped inner core portion disposed on a radially inner side of the plurality magnets; an outer core portion disposed on a radially outer side of the inner core portion; and a plurality of connecting portions connecting the outer core portion and the inner core portion in a radial direction, the outer core portion having a plurality of outer core elements which are connected to the inner core portion through the plurality of connecting portions, and the resin portion comprises: an upper resin portion covering at least a part of a top surface of the rotor core and at least a part of a top surface of each magnet; and a lower resin portion covering at least a part of a bottom surface of the rotor core and at least a part of a bottom surface of each magnet, the upper resin portion including a plurality of gate holes for insert molding of the resin portion, and the lower resin portion comprising: a first core support mark exposing a part of the bottom surface of the rotor core in a more radially inner side from the plurality of outer core elements; and a second core support mark exposing a part of the bottom surface of the rotor core in the outer core portion.