Pump apparatus

Abstract

A pump apparatus includes a motor that rotates a shaft, and a pump that is driven by the shaft, suctions an oil, and delivers the oil to the motor. The pump apparatus includes a first flow channel to suction an oil into the pump through a suction port provided in a pump cover using a negative pressure in the pump, a second flow channel to deliver an oil to the inside of the motor through a delivery port provided in a pump body using pressurization of the pump, a third flow channel provided between a stator and a rotor, a fourth flow channel provided between the stator and a housing, and a fifth flow channel to discharge an oil inside the motor through a discharge port provided in the housing.

1 - 23 . (canceled) 
     
     
         24 . A pump apparatus comprising:
 a motor including a shaft rotatably supported about a central axis extending in an axial direction; and   a pump on one side of the motor in the axial direction, is driven by the shaft extending from the motor, suctions an oil, and delivers the oil to the motor; wherein   the motor section includes:
 a rotor rotating around the shaft; 
 a stator disposed to face the rotor; 
 a housing accommodating the rotor and the stator; and 
 a discharge port provided in the housing to discharge the oil; 
   the pump includes:
 a pump rotor attached to the shaft; 
 a pump case accommodating the pump rotor; 
 a suction port provided in the pump case to suction the oil; and 
 a delivery port provided in the pump case to deliver the oil to the motor; 
   the suction port, the delivery port, and the discharge port are disposed at positions different from each other when viewed in the axial direction; and   the pump apparatus includes:
 a first flow channel to suction the oil into the pump through the suction port of the pump using a negative pressure in the pump; 
 a second flow channel to deliver the oil to an inside of the motor through the delivery port of the pump using pressurization of the pump; 
 a third flow channel provided between the stator and the rotor; 
 a fourth flow channel provided between the stator and the housing; and 
 a fifth flow channel to discharge the oil inside the motor section through the discharge port. 
   
     
     
         25 . The pump apparatus according to  claim 24 , wherein
 the pump case includes a pump cover and a pump body;   the pump body is open at both ends in the axial direction to allow the shaft to pass therethrough;   the pump cover blocks an opening of the pump body on one side in the axial direction; and   the pump rotor rotates due to rotation of the shaft.   
     
     
         26 . The pump apparatus according to  claim 25 , wherein the suction port is provided in the pump cover. 
     
     
         27 . The pump apparatus according to  claim 25 , wherein the suction port is provided on a side surface of the pump body. 
     
     
         28 . The pump apparatus according to  claim 25 , wherein the suction port is provided in a wall portion of the pump body extending to a pump side in the axial direction. 
     
     
         29 . The pump apparatus according to  claim 24 , wherein the suction port is connected to a negative pressure region inside the pump. 
     
     
         30 . The pump apparatus according to  claim 25 , wherein the delivery port is provided on a surface of the pump body facing the pump cover. 
     
     
         31 . The pump apparatus according to  claim 25 , wherein the second flow channel is located between the pump body and the shaft. 
     
     
         32 . The pump apparatus according to  claim 31 , wherein
 the pump includes a bearing between the pump body and the shaft; and   in the bearing, one end of the bearing on a side of the pump in the axial direction is on a side of the motor of one end of the pump body on the side of the pump.   
     
     
         33 . The pump apparatus according to  claim 24 , wherein when the pump apparatus is disposed such that the axial direction extends horizontally, the delivery port is positioned below the shaft in a direction of gravity. 
     
     
         34 . The pump apparatus according to  claim 24 , wherein the delivery port is connected to a pressurization region inside the pump. 
     
     
         35 . The pump apparatus according to  claim 24 , wherein the suction port and the delivery port are disposed at positions different from each other in a circumferential direction with respect to the central axis. 
     
     
         36 . The pump apparatus according to  claim 24 , wherein when the pump apparatus is disposed such that the axial direction extends horizontally, the discharge port is positioned above the shaft in a direction of gravity. 
     
     
         37 . The pump apparatus according to  claim 24 , wherein the discharge port is provided in a bottom portion of the housing. 
     
     
         38 . The pump apparatus according to  claim 24 , wherein
 the motor includes a bearing held in a bottom portion of the housing and rotatably supports the shaft; and   the oil passes through the fifth flow channel between the shaft and the bearing.   
     
     
         39 . The pump apparatus according to  claim 24 , wherein the discharge port is provided in a side surface of the housing. 
     
     
         40 . The pump apparatus according to  claim 39 , wherein the discharge port is positioned between one end of the stator on a side opposite to the section in the axial direction and a bottom portion of the housing. 
     
     
         41 . The pump apparatus according to  claim 24 , wherein a plurality of discharge ports are provided in the housing. 
     
     
         42 . The pump apparatus according to  claim 41 , wherein the discharge ports are provided in a bottom portion and on a side surface of the housing. 
     
     
         43 . The pump apparatus according to  claim 24 , wherein a cross-sectional area of the delivery port is smaller than a cross-sectional area of the discharge port.