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US 10,119,544 B2Granted
Automotive electric liquid pump
AssigneePierburg Pump Technology GmbH
InventorsAlessandro Malvasi, Robin Wegener
Life of this patent
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Abstract
An automotive electric liquid pump includes a pump wheel, an EC-motor which directly drives the pump wheel, and a cover disk. The EC-motor comprises a wet motor rotor. The wet motor rotor comprises a ring-like motor rotor cavity, and a motor rotor body comprising a cylindrical rotor body section. The cylindrical rotor body section is permanently magnetized and surrounds a motor rotor cavity which is ring-like. The cover disk is arranged at a longitudinal rotor end opposite to the pump wheel. The cover disk closes the motor rotor cavity.
Claims8
An automotive electric liquid pump comprising:
- a pump wheel;
- an EC-motor configured to directly drive the pump wheel, the EC-motor comprising a wet motor rotor, the wet motor rotor comprising,
- a ring-like motor rotor cavity,
- a motor rotor body comprising a cylindrical rotor body section, the cylindrical rotor body section being configured to be permanently magnetized and to surround the motor rotor cavity, and
- a cover body comprising a cylindrical bearing sleeve and a cover disk arranged at a longitudinal rotor end opposite to the pump wheel, the cover disk being configured to completely close the motor rotor cavity;
- and
- a stationary cylindrical bearing shaft configured to directly rotatably support the cover body,
- wherein,
- the wet motor rotor is provided as one single monolithic body which is made of a permanent magnet material.
6 more elements
Dependencies are inferred from the claim text.