US 12,078,191 B2
Electronic water pump and housing assembly thereof
Dong Wang, Guangdong (CN); Xiao Ge, Guangdong (CN); and Huajiang Chen, Guangdong (CN)
Assigned to GUANGDONG WELLING AUTO PARTS CO., LTD., Guangdong (CN)
Filed by GUANGDONG WELLING AUTO PARTS CO., LTD., Guangdong (CN)
Filed on Dec. 11, 2020, as Appl. No. 17/119,173.
Application 17/119,173 is a continuation of application No. PCT/CN2019/094988, filed on Jul. 8, 2019.
Claims priority of application No. 201811014637.0 (CN), filed on Aug. 31, 2018; and application No. 201821424766.2 (CN), filed on Aug. 31, 2018.
Prior Publication US 2021/0131448 A1, May 6, 2021
Int. Cl. F04D 29/60 (2006.01); F04D 13/06 (2006.01); F04D 29/40 (2006.01)
CPC F04D 29/605 (2013.01) [F04D 13/06 (2013.01); F04D 29/406 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of providing an electronic water pump, comprising:
providing a water power part;
providing a brushless motor part; and
providing a control part,
wherein:
the water power part comprises a pump housing and an impeller;
the brushless motor part comprises a rotor and a housing assembly;
the control part comprises a control panel and a rear end cover; and
the brushless motor part is arranged between the water power part and the control part,
wherein the housing assembly is provided by:
providing a stator assembly through one-piece injection molding; and
providing a housing through injection molding,
wherein the housing is over-molded on the stator assembly to enclose the stator assembly, such that self-sealing is provided between the stator assembly and the housing,
wherein:
the impeller comprises an impeller main body and a blade;
the rotor comprises a rotor core, a magnetic steel and a shaft sleeve; and
the rotor core is provided with a magnetic steel groove and the magnetic steel is installed in the magnetic steel groove, and
wherein the method further comprises:
packing the rotor core and the magnetic steel inside the impeller main body through plastic molding to form a first precursor of an impeller rotor assembly;
over-molding the shaft sleeve into the first precursor to form a second precursor of the impeller rotor assembly; and
connecting the second precursor to the blade to form the impeller rotor assembly.