US 11,719,254 B2
Micro water pump
Detao Xu, Shenzhen (CN); Fanghua Ling, Shenzhen (CN); and Sensen Yang, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed on Nov. 23, 2021, as Appl. No. 17/534,394.
Claims priority of application No. 202022812013.2 (CN), filed on Nov. 27, 2020.
Prior Publication US 2022/0170481 A1, Jun. 2, 2022
Int. Cl. F04D 29/42 (2006.01); F04D 13/06 (2006.01); F04D 29/60 (2006.01); F04D 29/043 (2006.01)
CPC F04D 29/426 (2013.01) [F04D 13/06 (2013.01); F04D 29/043 (2013.01); F04D 29/605 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A micro water pump, comprising:
a housing having a base, an upper cover engaging with the base, an inner cavity, an inlet communicated with the inner cavity, and an outlet communicated with the inner cavity;
a drive mechanism installed in the housing, comprises a rotating shaft, an impeller arranged in the inner cavity and rotatably connected with the rotating shaft, a rotor installed in the impeller, and a stator installed in the base for driving the rotor to rotate; wherein
the rotating shaft comprises a first end surface and a second end surface arranged relatively parallel, a sidewall surface connecting the first end surface and the second end surface;
the upper cover includes a body part, and an accommodation slot formed by sinking from a surface of the body part close to the base;
one end of the rotating shaft close to the first end surface is embedded in the base; one end of the rotating shaft close to the second end surface is accommodated in the accommodation slot;
the accommodation slot comprises a groove bottom surface and a groove side surface formed by bending and extending from the groove bottom surface in a direction close to the base; the groove side surface abuts against the sidewall surface.