US 12,088,164 B2
Motor stator having electrical insulators with overlapping parts
Masahiro Hasegawa, Kasugai (JP); and Shoji Mano, Kasugai (JP)
Assigned to AICHI ELECTRIC CO., LTD., Kasugai (JP)
Filed by AICHI ELECTRIC CO., LTD., Kasugai (JP)
Filed on Mar. 10, 2022, as Appl. No. 17/691,707.
Prior Publication US 2023/0291265 A1, Sep. 14, 2023
Int. Cl. H02K 3/38 (2006.01); H02K 1/18 (2006.01); H02K 3/28 (2006.01)
CPC H02K 3/38 (2013.01) [H02K 1/18 (2013.01); H02K 3/28 (2013.01)] 16 Claims
OG exemplary drawing
 
1. Electrical insulators configured to be respectively fitted onto radially-extending teeth of a stator that are spaced apart from each other in a circumferential direction and also extend in an axial direction, each one of the electrical insulators comprising:
a first flange that extends in the circumferential direction and the axial direction;
a second flange that is radially inward of the first flange and extends in the circumferential direction and the axial direction; and
a body that extends radially, connects the first flange and the second flange, and has a through hole configured to receive one of the radially-extending teeth,
wherein:
the second flange has first and second overlapping parts respectively formed on opposite sides of the through hole in the circumferential direction and extending in the circumferential direction and the axial direction,
the first overlapping part of each of the electrical insulators is configured to radially overlap the second overlapping part of an adjacent one of the insulators in the circumferential direction in a state in which the electrical insulators are respectively fitted onto the teeth of the stator,
the second overlapping part of each of the electrical insulators is configured to radially overlap the first overlapping part of an adjacent one of the insulators in the circumferential direction in the state in which the electrical insulators are respectively fitted onto the teeth of the stator,
the electrical insulators comprise first electrical insulators and second electrical insulators,
the first and second overlapping parts of the first electrical insulators are configured to be disposed radially outward of the first and second overlapping parts of adjacent ones of the second electrical insulators in the circumferential direction in the state in which the first and second electrical insulators are respectively fitted onto the teeth of the stator,
the first overlapping part of each of the first electrical insulators has a first abutment part configured to abut on a side surface of one of the first or second overlapping parts of an adjacent one of the second electrical insulators on a first side in the circumferential direction, and a second abutment part configured to abut on an end wall of the one of the first or second overlapping parts of the adjacent one of the second electrical insulators on a first side in the axial direction, and
the second overlapping part of each of the first electrical insulators has a first abutment part configured to abut on a side surface of the one of the first or second overlapping parts of another adjacent one of the second electrical insulators on a second side in the circumferential direction, and a second abutment part configured to abut on an end wall of the one of the first or second overlapping parts of the other adjacent one of the second electrical insulators on the first side in the axial direction.