US 12,476,514 B2
Motor shaft, motor, and electric vehicle
Xiong Hu, Shenzhen (CN); Xueyu Mei, Shanghai (CN); Zhengyi Tang, Shenzhen (CN); and Senlin Ma, Shanghai (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Jul. 7, 2023, as Appl. No. 18/348,658.
Application 18/348,658 is a continuation of application No. PCT/CN2022/071399, filed on Jan. 11, 2022.
Claims priority of application No. 202120118966.0 (CN), filed on Jan. 15, 2021.
Prior Publication US 2023/0353006 A1, Nov. 2, 2023
Int. Cl. H02K 5/16 (2006.01); B60L 50/60 (2019.01); H02K 5/173 (2006.01); H02K 7/00 (2006.01); H02K 7/08 (2006.01); F16C 19/06 (2006.01)
CPC H02K 5/1732 (2013.01) [B60L 50/60 (2019.02); H02K 7/003 (2013.01); H02K 7/083 (2013.01); F16C 19/06 (2013.01); F16C 2380/26 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A motor shaft, comprising:
a shaft body comprising:
a first mounting portion configured to mount a rotor and
a second mounting portion configured to mount a bearing, wherein the first mounting portion and the second mounting portion are connected by fastening, a positioning step surface is disposed at an end of the first mounting portion that is close to the second mounting portion, and the second mounting portion is further provided with an annular groove extending along a circumferential direction of the second mounting portion; and
an insulation coating, wherein the second mounting portion is covered with the insulation coating, an inner wall of the annular groove is not covered with the insulation coating and a resistivity of the insulation coating is not less than 107 Ω·m.