Rotor for rotary electric machine

A rotor for a rotary electric machine, comprising:

• a shaft capable of rotating about an axis;
• a rotor main body that includes a field coil impregnated with resin and is fixed to the shaft;
• and
• a slip ring device including a pair of slip rings, a pair of connecting conductors for electrically connecting the slip rings to the field coil, and an insulating molded body attached to a part of the shaft that projects from the rotor main body, the slip rings and the connecting conductors being provided in the insulating molded body,
• wherein the insulating molded body includes a molded body main body portion disposed in a position further from the rotor main body than a bearing provided on the shaft, the slip rings being provided in the molded body main body portion, an opposing portion disposed between the bearing and the rotor main body, and a pair of beam portions that connect the molded body main body portion to the opposing portion, the connecting conductors being provided respectively in the beam portions,
• a pair of shaft grooves respectively accommodating the beam portions are provided in the shaft,
• a spreading suppression portion for preventing the resin with which the field coil is impregnated from spreading into the shaft grooves is provided in the opposing portion,
• a resin accommodating groove extending in a circumferential direction of the shaft is provided in an end surface of the opposing portion on the rotor main body side as the spreading suppression portion,
• the resin accommodating groove is provided in the end surface so as to avoid circumferential ranges of the respective beam portions in a radial direction of the opposing portion.

A rotor for a rotary electric machine, comprising:

• a shaft capable of rotating about an axis;
• a rotor main body that includes a field coil impregnated with resin and is fixed to the shaft;
• and
• a slip ring device including a pair of slip rings, a pair of connecting conductors for electrically connecting the slip rings to the field coil, and an insulating molded body attached to a part of the shaft that projects from the rotor main body, the slip rings and the connecting conductors being provided in the insulating molded body,
• wherein the insulating molded body includes a molded body main body portion disposed in a position further from the rotor main body than a bearing provided on the shaft, the slip rings being provided in the molded body main body portion, an opposing portion disposed between the bearing and the rotor main body, and a pair of beam portions that connect the molded body main body portion to the opposing portion, the connecting conductors being provided respectively in the beam portions,
• a pair of shaft grooves respectively accommodating the beam portions are provided in the shaft,
• a spreading suppression portion for preventing the resin with which the field coil is impregnated from spreading into the shaft grooves is provided in the opposing portion,
• a projection extending in a circumferential direction of the opposing portion is provided in an outer peripheral surface of the opposing portion as the spreading suppression portion,
• the projection is provided in the outer peripheral surface of the opposing portion so as to avoid the exposed end portions of the respective connecting conductors.