Electric pump
AssigneeMahle Filter Systems Japan Corporation
InventorsToshinobu HORIMATSU, Satoshi Masukura, Naoto Morishita
Life of this patent
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Abstract
An electric pump includes a housing 2 configured of a housing body 3 and a cover 4, a stator 6 having a plurality of coils 15, a rotor 7 configured of an inner side outer rotor 16 and an outer side rotor body 17, a pump part 8 disposed on the inner circumferential side of the rotor 7 of an electric motor 5, side plates 11 and 12 disposed on both side surfaces of the rotor 7, an inner rotor 9, and a plurality of connecting plates 10 interposed between the outer rotor 16 and the inner rotor 9. The side plate 12 of the side plates 11 and 12 is pressed to the rotor 7 by a compression coil spring 28.
Claims5
An electric pump comprising:
- a housing having a sealed structure;
- a stator including a plurality of coils arranged circumferentially, the stator which is accommodated in the housing;
- a rotor disposed on an inner circumferential side of the stator;
- a pump part disposed on an inner circumferential side of the rotor and driven by an electric motor, the rotor which also serves as an outer rotor of the pump part and forms the electric motor with the stator;
- a pair of side plates disposed on both side surfaces of the rotor;
- and
- an inner rotor disposed on the inner circumferential side of the rotor eccentrically, and forming a pump chamber of the pump part with the rotor and the pair of the side plates, the inner rotor which rotates with rotation of the rotor,
- wherein at least one of the pair of the side plates is pressed to the rotor by an elastic member.
Dependencies are inferred from the claim text.