Electric pump

Abstract

An electric pump includes: a motor housing; a pump housing adjacent to the motor housing; a rotor accommodated in the motor housing and axially supported by a rotating shaft; a stator disposed radially outward of the rotor and fixed to the motor housing; a pump unit accommodated in the pump housing and configured to suck and discharge a fluid by rotation of the rotor; and a cup-shaped can provided between the rotor and the stator to prevent the fluid in the pump unit from being introduced into the stator. A seal member is disposed between the can and the motor housing, and a communication path communicating inner and outer sides of the can is formed between the motor and pump housings at a position closer to an opening side of the can than the seal member.

What is claimed is: 
     
         1 . An electric pump comprising:
 a motor housing;   a pump housing adjacent to the motor housing;   a rotor accommodated in the motor housing and axially supported by a rotating shaft;   a stator disposed radially outward of the rotor and fixed to the motor housing;   a pump unit accommodated in the pump housing and configured to suck and discharge a fluid by rotation of the rotor; and   a cup-shaped can provided between the rotor and the stator to prevent the fluid in the pump unit from being introduced into the stator,   wherein a seal member is disposed between the can and the motor housing, and   a communication path that communicates an inner side of the can with an outer side of the can is formed between the motor housing and the pump housing at a position closer to an opening side of the can than the seal member.   
     
     
         2 . The electric pump according to  claim 1 ,
 wherein the can includes a flange that is provided on an end thereof at the opening side and extends radially outward between the motor housing and the pump housing,   the seal member is elastically deformable and is disposed between the motor housing and the flange, and   the flange of the can is configured to abut on the seal member in a state of having a gap with the motor housing, and the communication path is formed by narrowing the gap.   
     
     
         3 . The electric pump according to  claim 1 ,
 wherein the can includes a flange that is provided on an end thereof at the opening side and extends radially outward between the motor housing and the pump housing,   the seal member is elastically deformable and is disposed between the motor housing and the flange, and   the flange of the can is pressed by the seal member to close the communication path.