US 12,395,029 B2
Insulator, stator and electric motor
Koji Yonekawa, Gunma (JP); Takeshi Kanai, Gunma (JP); Ryo Ohori, Gunma (JP); and Yukari Otsuka, Gunma (JP)
Assigned to MITSUBA Corporation, Gunma (JP)
Appl. No. 18/009,738
Filed by MITSUBA Corporation, Gunma (JP)
PCT Filed Mar. 17, 2022, PCT No. PCT/JP2022/012158
§ 371(c)(1), (2) Date Dec. 12, 2022,
PCT Pub. No. WO2022/264580, PCT Pub. Date Dec. 22, 2022.
Claims priority of application No. 2021-099567 (JP), filed on Jun. 15, 2021.
Prior Publication US 2024/0136880 A1, Apr. 25, 2024
Prior Publication US 2024/0235309 A9, Jul. 11, 2024
Int. Cl. H02K 3/34 (2006.01); H02K 1/16 (2006.01); H02K 1/18 (2006.01)
CPC H02K 3/345 (2013.01) [H02K 1/16 (2013.01); H02K 1/18 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An insulator, adapted to be attached to a core body having an annular shape and a plurality of teeth protruding along a radial direction from the core body, the insulator is adapted for insulating the teeth and a coil wound around the teeth, each tooth of the plurality of teeth being a tooth that protrudes radially inward from an inner surface of the core body and has an axial end surface facing toward an axial direction of the core body, the insulator comprising:
a tooth end surface covering part configured to cover the axial end surface of the tooth,
wherein the tooth end surface covering part comprises:
a front surface configured to face away from the axial end surface of the tooth;
a back surface opposite to the front surface, the back surface configured to face toward the axial end surface of the tooth;
an inclined part configured on the front surface of the tooth end surface covering part and inclined such that a height of the inclined part gradually changes along the radial direction; and
a concave part configured on the back surface of the tooth end surface covering part and being concaved toward the inclined part in a direction away from the axial end surface of the tooth,
wherein the concave part comprises:
an inclined part parallel part provided parallel to the inclined part; and
a tooth parallel part provided parallel to a horizontal plane parallel to the axial end surface of the tooth.