US 12,140,141 B1
Electric oil pump including pump housing and eccentric assembly non-concentrically arranged with pump housing
Liping Wang, Zhejiang (CN); Guojun Zhang, Zhejiang (CN); Ruinan Wang, Zhejiang (CN); Hezhao Hua, Zhejiang (CN); Yi Zhao, Zhejiang (CN); and Zhixue Lu, Zhejiang (CN)
Assigned to HANGZHOU QUADRANT TECHNOLOGY CO., LTD., Zhejiang (CN)
Filed by HANGZHOU QUADRANT TECHNOLOGY CO., LTD., Zhejiang (CN)
Filed on Apr. 30, 2024, as Appl. No. 18/650,258.
Int. Cl. F04C 2/10 (2006.01); F04C 2/07 (2006.01); F04C 2/08 (2006.01); F04C 15/00 (2006.01)
CPC F04C 15/0065 (2013.01) [F04C 2/10 (2013.01); F04C 2/101 (2013.01); F04C 2/103 (2013.01); F04C 2240/30 (2013.01); F04C 2240/40 (2013.01); F04C 2240/80 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electric oil pump, comprising a pump housing, wherein the pump housing is connected with an outer gear and an inner gear engaged each other, the pump housing is internally connected to a fixed shaft concentrically arranged with the pump housing, the outer gear is connected to the fixed shaft and concentrically arranged with the pump housing, the fixed shaft comprises a connecting section, an eccentric calibrator is provided on an outer circumferential wall of the connecting section, the eccentric calibrator and the connecting section form an eccentric assembly, the inner gear is rotated around a geometric central axis of the eccentric assembly, and the eccentric assembly is non-concentrically arranged with the pump housing;
wherein one end of the fixed shaft is press-fitted with a bearing, the inner gear comprises an inner circumference coaxially fit around with the fixed shaft against the eccentric assembly, an inner circumference of a motor rotor is axially arranged to fit around an outer circumference of the outer gear, an upper part of an outer circumference of the motor rotor is provided with an inner circumference to press-fit with an outer ring of the bearing, the eccentric assembly is fit with the fixed shaft via a bushing, and the inner gear is sleeved on the bushing.