Rotor and motor including the same

A rotor comprising:

• a plurality of rotor cores;
• a plurality of magnets magnetized such that magnetic flux is formed in a circumferential direction, the magnets and the rotor cores being alternately arranged in the circumferential direction;
• a coupler connected to a shaft;
• and
• a rotor frame formed by injection molding, the rotor frame being integrally coupled to the rotor cores, the magnets, and the coupler, wherein each of the rotor cores comprises:
• a pole shoe for defining a gap between each of the rotor cores and a stator;
• a rotor core body having a depression formed in a side opposite to the pole shoe in a radial direction;
• and
• a fixing hole,
• wherein radially outer portions of side surfaces of the plurality of magnets located at opposite sides of each of the rotor cores do not directly contact with the rotor cores by the depression to define an aperture formed between each of the rotor cores and each of the magnets in the circumferential direction such that the magnetic flux from the magnets is concentrated toward the stator in the radial direction via the rotor cores, and
• the depression is filled with a molding material such that the rotor cores are supported by the rotor frame,
• wherein the fixing hole is formed such that a fixing pin for supporting each of the rotor cores in a mold during injection molding of the rotor frame is inserted into the fixing hole,
• wherein the rotor frame is provided with a cover hole formed as a result of separation of the fixing pin from the rotor frame after the injection molding of the rotor frame, and
• wherein a portion of each of the rotor cores fixed in the rotor frame is exposed outward through the cover hole.

A rotor comprising:

• a plurality of rotor cores;
• a plurality of magnets magnetized such that magnetic flux is formed in a circumferential direction, the magnets and the rotor cores being alternately arranged in the circumferential direction;
• a coupler connected to a shaft;
• and
• a rotor frame formed by injection molding, the rotor frame being integrally coupled to the rotor cores, the magnets, and the coupler, wherein each of the rotor cores comprises:
• a pole shoe for defining a gap between each of the rotor cores and a stator;
• a rotor core body having a depression formed in a side opposite to the pole shoe in a radial direction;
• and
• a fixing hole,
• wherein radially outer portions of side surfaces of corresponding ones of the plurality of magnets located at opposite sides of each of the rotor cores do not directly contact with the rotor cores such that the magnetic flux from the magnets is concentrated toward the stator in the radial direction via the rotor cores from the side surfaces of the magnets, and
• the depression is filled with a molding material such that the rotor cores are supported by the rotor frame,
• wherein the fixing hole is formed such that a fixing pin for supporting each of the rotor cores in a mold during injection molding of the rotor frame is inserted into the fixing hole,
• wherein the rotor frame is provided with a cover hole formed as a result of separation of the fixing pin from the rotor frame after the injection molding of the rotor frame, and
• wherein a portion of each of the rotor cores fixed in the rotor frame is exposed outward through the cover hole.

A rotor comprising:

• a plurality of rotor cores;
• a plurality of magnets magnetized such that magnetic flux is formed in a circumferential direction, the magnets and the rotor cores being alternately arranged in the circumferential direction;
• a coupler connected to a shaft;
• and
• a rotor frame formed by injection molding, the rotor frame being integrally coupled to the rotor cores, the magnets, and the coupler, wherein
• each of the rotor cores comprises:
• a pole shoe for defining a gap between each of the rotor cores and a stator, and a rotor core body having a depression formed in a side opposite to the pole shoe in a radial direction toward the pole shoe,
• the depression comprises:
• incision parts formed at circumferentially opposed ends thereof for forming side surfaces of radial tips of the magnets and an aperture radially outer portions of side surfaces of corresponding ones of the plurality of magnets located at opposite sides of each of the rotor cores do not directly contact with the rotor cores;
• and
• a fixing hole formed between the incision parts so as to be further depressed in the radial direction, and
• a portion of an outer circumferential surface of the fixing hole is open,
• wherein the fixing hole is formed such that a fixing pin for supporting each of the rotor cores in a mold during injection molding of the rotor frame is inserted into the fixing hole,
• wherein the rotor frame is provided with a cover hole formed as a result of separation of the fixing pin from the rotor frame after the injection molding of the rotor frame, and
• wherein a portion of each of the rotor cores fixed in the rotor frame is exposed outward through the cover hole.

A rotor comprising:

• a plurality of rotor cores;
• a plurality of magnets magnetized such that magnetic flux is formed in a circumferential direction, the magnets and the rotor cores being alternately arranged in the circumferential direction;
• a coupler connected to a shaft;
• and
• a rotor frame formed by injection molding, the rotor frame being integrally coupled to the rotor cores, the magnets, and the coupler, wherein each of the rotor cores comprises:
• a pole shoe for defining a gap between each of the rotor core;
• a stator and a rotor core body;
• and
• a fixing hole, wherein the rotor core body is provided with an outer aperture having a radial width greater than a circumferential width such that radially outer portions of side surfaces of corresponding ones of the plurality of magnets located at opposite sides of each of the rotor cores do not directly contact with the rotor cores,
• wherein the fixing hole is formed such that a fixing pin for supporting each of the rotor cores in a mold during injection molding of the rotor frame is inserted into the fixing hole,
• wherein the rotor frame is provided with a cover hole formed as a result of separation of the fixing pin from the rotor frame after the injection molding of the rotor frame, and
• wherein a portion of each of the rotor cores fixed in the rotor frame is exposed outward through the cover hole.