ELECTRIC PUMP UNIT

摘要

An electric pump unit is provided that ensures capability for lubricating a plain bearing and in which a lubricating oil passage is formed with a simple structure. This pump unit includes: a pump in which a rotor placed in a pump chamber of a pump housing rotates; and an electric motor having a motor shaft coupled to the rotor. The motor shaft is rotatably supported by a cylindrical plain bearing disposed in the pump housing. An oil seal is provided on the opposite side to the pump chamber with the plain bearing between so as to be located between the pump housing and the motor shaft. Oil supply grooves are formed in an inner peripheral surface of the plain bearing so as to extend through the plain bearing in an axial direction.

主权项

1. An electric pump unit, comprising:
a pump that sucks and discharges oil as a rotor placed in a pump chamber of a pump housing rotates while in sliding contact with wall surfaces at both axial ends of the pump chamber; and an electric motor that has a motor shaft coupled to the rotor and drives the pump; wherein the motor shaft is rotatably supported by a cylindrical plain bearing disposed in the pump housing, a seal member is provided at a position on an opposite side to the pump chamber with the plain bearing between so as to be located between the pump housing and the motor shaft, and an oil supply groove is formed in an inner peripheral surface of the plain bearing so as to extend through the plain bearing in an axial direction.