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|1. (WO2018159477) PUMP DEVICE|
|Applicants:||NIDEC TOSOK CORPORATION
This pump device 1 comprises a motor unit 10 having a shaft 5 which rotates around a central axis J, and a pump unit 40 which is positioned to one side in the axial direction and which is driven via the shaft 5 and discharges oil. The motor unit 10 comprises a rotor 11 and stator 15, a housing 21 which houses these, a wall 25 which separates the stator 15 and the rotor 11, and a motor-side discharge port 27 which discharges oil. The pump unit 40 comprises a pump rotor 45, a pump case 49 which houses the pump rotor, a pump-side suction port 63 which sucks oil, and a pump-side delivery port 41d1 which delivers oil into the motor unit 10. The pump device 40 comprises a first flow path 51 which passes oil through the pump-side suction port 47a into the pump unit 40, a second flow path 52 which passes oil through the pump-side delivery port 41d1 into a stator region As, and a third flow path 53 which passes oil into the stator 15.