| CPC H02K 3/522 (2013.01) [H02K 2203/12 (2013.01)] | 16 Claims |
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1. A motor comprising:
a stator; and
a rotor that is rotatable relative to the stator;
wherein:
the stator has a stator core, first and second electrical insulator assemblies, insulation members, and a stator winding,
the stator core has a yoke extending in a circumferential direction around an axis of the stator core, a plurality of teeth extending radially inward from the yoke, and a plurality of slots each defined by the yoke and a pair of adjacent teeth,
the first electrical insulator assembly and the second electrical insulator assembly are respectively arranged on a first side and a second side of the stator core in an axial direction,
each of the first electrical insulator assembly and the second electrical insulator assembly has an outer wall part that extends in the circumferential direction and faces the yoke, and extending parts that extend radially inward from the outer wall part and respectively face the teeth,
the stator winding has a plurality of winding parts,
each of the winding parts is respectively wound around one of the teeth of the stator core, one of the extending parts of the first electrical insulator assembly and one of the extending parts of the second electrical insulator assembly,
each of the insulation members has an interphase insulation part, and a first end part and a second end part that are respectively formed by folding a first edge and a second edge of the interphase insulation part away from each other in the circumferential direction,
each of the extending parts of the first electrical insulator assembly has a tip part that is formed on an opposite side to the outer wall part and has a first flange and a second flange respectively protruding toward a first side and a second side in the circumferential direction,
each of the extending parts of the second electrical insulator assembly has a tip part that is formed on an opposite side to the outer wall part and has a third flange and a fourth flange respectively protruding toward the first side and the second side in the circumferential direction,
the interphase insulation parts are respectively disposed between adjacent ones of the winding parts, and
for each one of the extending parts of the first electrical insulator assembly:
the first flange has a first radial movement restriction surface configured to restrict radially outward movement or radially inward movement of the insulation member, and a first axial movement restriction surface that faces an adjacent one of the slots and extends in the circumferential direction and the radial direction,
the second flange has a second radial movement restriction surface configured to restrict radially outward movement or radially inward movement of the insulation member, and a second axial movement restriction surface that faces an adjacent one of the slots and extends in the circumferential direction and the radial direction,
the first radial movement restriction surface, a side surface of the extending part of the first electrical insulator assembly on the first side in the circumferential direction, and the first axial movement restriction surface together define a first movement restriction recess that is open toward the second side in the axial direction, the first side in the circumferential direction and radially inwardly,
the second radial movement restriction surface, a side surface of the extending part of the first electrical insulator assembly on the second side in the circumferential direction, and the second axial movement restriction surface together define a second movement restriction recess that is open toward the second side in the axial direction, the second side in the circumferential direction and radially inwardly, and
a portion of the second end part of the insulation member on the first side in the axial direction is disposed in the first movement restriction recess, and a portion of the first end part of the insulation member on the first side in the axial direction is disposed in the second movement restriction recess such that movement of the insulation members toward the first side and the second side in the axial direction is restricted.
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