US 11,967,865 B2
Drive motor
Zhiyan Guo, Honghu (CN); Jun Li, Lanxi (CN); and Fangkui LIn, Yueqing (CN)
Assigned to ZHEJIANG BAOLONG M&E CO., LTD., Yueqing (CN); and SHENZHEN YUNDING INFORMATION TECHNOLOGY CO., LTD., Shenzhen (CN)
Appl. No. 17/251,217
Filed by Zhejiang Baolong M&E Co., Ltd., Yueqing (CN); and Shenzhen Yunding Information Technology Co., Ltd., Shenzhen (CN)
PCT Filed Jan. 16, 2019, PCT No. PCT/CN2019/071897
§ 371(c)(1), (2) Date Dec. 11, 2020,
PCT Pub. No. WO2019/237736, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 201820899338.9 (CN), filed on Jun. 11, 2018; and application No. 201810896858.9 (CN), filed on Aug. 8, 2018.
Prior Publication US 2021/0249918 A1, Aug. 12, 2021
Int. Cl. H02K 1/27 (2022.01); H02K 1/276 (2022.01); H02K 21/14 (2006.01)
CPC H02K 1/2766 (2013.01) [H02K 21/14 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A drive motor, comprising
a housing, and
a stator iron core;
wherein
the stator iron core is arranged inside the housing;
a rotor iron core is placed through an inside of the stator iron core;
the rotor iron core comprises a cylindrical iron core body; and a first opening and second opening symmetrically formed on a periphery of the cylindrical iron core body in a radial direction of the cylindrical iron core body, respectively;
the cylindrical iron core body is provided with a plurality of mounting slots for receiving magnets, the plurality of mounting slots comprise two groups of mounting slots, such that a first group of mounting slots is provided on an upper side of the two openings while a second group of mounting slots is provided on a lower side of the two openings; each group of the two groups of mounting slots comprise two mounting slots, such that there are two mounting slots between each pair of adjacent openings; the mounting slots are arranged symmetrically in pairs and non-uniformly along a circumferential direction of the rotor iron core; and each of both sides of each mounting slot of the plurality of mounting slots is provided with a magnetic-leakproof air slot, wherein a shape of the magnetic-leakproof air slots at the closest ends of the two mounting slots in a same group are a combination of an arc and a straight line, such that two mounting slots in the same group are closer to each other;
each of the first opening and second opening has a trapezoidal shape gradually narrowing toward the through hole; and
a central part of the cylindrical iron core body is provided with a through hole, a rotating shaft is inserted into the through hole.