US 11,901,775 B2
Rotor, motor, and electric vehicle
Jiangang Wang, Dongguan (CN); Quanming Li, Dongguan (CN); and Tingyu Xie, Dongguan (CN)
Assigned to HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd, Shenzhen (CN)
Filed on Sep. 13, 2021, as Appl. No. 17/472,998.
Application 17/472,998 is a continuation of application No. PCT/CN2020/083051, filed on Apr. 2, 2020.
Claims priority of application No. 201910570394.7 (CN), filed on Jun. 27, 2019.
Prior Publication US 2021/0408854 A1, Dec. 30, 2021
Int. Cl. H02K 1/32 (2006.01); B60K 1/00 (2006.01); B60K 17/08 (2006.01); H02K 1/28 (2006.01)
CPC H02K 1/32 (2013.01) [B60K 1/00 (2013.01); B60K 17/08 (2013.01); H02K 1/28 (2013.01); B60K 2001/006 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A rotor, comprising a rotor iron core and a rotor shaft, wherein
the rotor iron core is cylindrical in shape and has a first end and a second end along an axial direction, a fastening plate is fastened to at least one end of the rotor iron core, a through hole and a first runner are disposed in the fastening plate; the through hole is arranged along the axial direction of the rotor iron core, the first runner is a damping runner, an inlet of the first runner communicates with the through hole, and an outlet of the first runner is disposed on a surface of a circumferential side of the fastening plate;
the rotor shaft is fitted in the rotor iron core, and at least one end of the rotor shaft extends to the outside of the rotor iron core from the through hole of the fastening plate; a second runner and a third runner are disposed in the rotor shaft, wherein the second runner is disposed along an axial direction, wherein the third runner is disposed along a radial direction at least at one of positions corresponding to the through hole; an inlet of the second runner is disposed at one end of the rotor shaft, an outlet of the second runner communicates with an inlet of the third runner, and an outlet of the third runner communicates with the inlet of the first runner; and
the fastening plates are separately fastened to the first end and the second end, and a fourth runner is disposed on an inner wall of the rotor iron core along the axial direction of the rotor iron core and extends from the first end to the second end, an inlet of the fourth runner communicates with the first runner in the fastening plate fastened to the first end, and an outlet of the fourth runner communicates with the first runner in the fastening plate fastened to the second end,
wherein at least one fastening plate of the fastening plates includes:
a first sub-plate with a first groove; and
a second sub-plate with a second groove, the first sub-plate contacts the second sub-plate thereby forming the first runner where the first groove and the second groove are positioned opposite of each other in the corresponding first sub-plate and the second sub-plate.