US 9,812,915 B2 | ||
Rotor for rotary electric machine having through piece holes and ribs | ||
Manabu Yazaki, Wako (JP) | ||
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP) | ||
Filed by HONDA MOTOR CO., LTD., Tokyo (JP) | ||
Filed on Sep. 19, 2014, as Appl. No. 14/490,674. | ||
Claims priority of application No. 2013-195194 (JP), filed on Sep. 20, 2013. | ||
Prior Publication US 2015/0084469 A1, Mar. 26, 2015 | ||
Int. Cl. H02K 1/32 (2006.01); H02K 1/27 (2006.01); H02K 9/19 (2006.01) |
CPC H02K 1/32 (2013.01) [H02K 1/276 (2013.01); H02K 9/19 (2013.01)] | 17 Claims |
1. A rotor for a rotary electric machine, comprising:
a rotor core being rotatable around a rotational axis, the rotor core including a plurality of steel plates stacked in a stacking
direction parallel to the rotational axis and having a plurality of magnet insertion holes at every first circumferential
space, each of the plurality of steel plates comprising:
a plurality of magnet insertion piece holes provided at every said first circumferential space, the plurality of magnet insertion
piece holes constituting the plurality of magnet insertion holes when the plurality of steel plates are stacked in the stacking
direction while the plurality of steel plates are rotated by the first circumferential space and a predetermined number of
the plurality of steel plates are stacked in the stacking direction;
a plurality of through piece holes penetrating each of the plurality of steel plates at every second circumferential space
in the stacking direction on a radially inner side of the plurality of magnet insertion piece holes, the first circumferential
space and the second circumferential space being different from each other;
a radially inner side annular ring provided on a radially inner side of the plurality of through piece holes;
a radially outer side annular ring provided on a radially outer side of the plurality of through piece holes; and
a plurality of ribs provided between the plurality of through piece holes and connecting the radially inner side annular ring
and the radially outer side annular ring,
wherein a first one of the magnet insertion piece holes of a first one of the steel plates entirely overlaps a second one
of the magnet insertion piece holes of a second one of the steel plates when viewed in the stacking direction, and
wherein a first one of the through piece holes of the first one of the steel plates partially overlaps a second one of the
through piece holes of the second one of the steel plates when viewed in the stacking direction.
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