| 摘要 |
An electric pump unit includes: a unit housing; a bearing unit provided within the unit housing; a rotary portion; and a motor stator fixed to the unit housing. The rotary portion includes: a pump driving motor shaft supported by the bearing unit such that an axial position of a center of gravity of the rotary portion falls within an axial range of the bearing unit, and a motor rotor. The motor rotor includes: a disc portion which extends radially outwards from an axial end portion of the motor shaft; and a cylindrical portion which extends from an outer circumferential portion of the disc portion towards the other axial end side and surrounds an outer circumference of the bearing unit.
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