Pump apparatus

Abstract

A pump apparatus includes a motor including a shaft rotatable around a central axis, and a pump that is positioned on one side in an axial direction thereof, is driven via the shaft, and discharges an oil. The motor includes a rotor, a stator, a housing accommodating the rotor and the stator, a wall partitioning the stator and the rotor, and a motor side discharge port to discharge an oil. The pump includes a pump rotor, a pump case accommodating the pump rotor, a pump side suction port to suction an oil, and a pump side delivery port to deliver an oil to the inside of the motor. A pump apparatus includes a first flow channel to cause an oil to flow into the pump through a pump side suction port, a second flow channel to cause an oil to flow to a stator region through the pump side delivery port, and a third flow channel to cause an oil to flow into the stator.

1 - 14 . (canceled) 
     
     
         15 . A pump apparatus comprising:
 a motor including a shaft rotatably supported about a central axis extending in an axial direction; and   a pump that is positioned on one side of the motor in the axial direction, is driven by the motor via the shaft, and discharges an oil; wherein   the motor includes:
 a rotor rotatable around the shaft; 
 a stator disposed on an outer side of the rotor in a radial direction; 
 a housing accommodating the rotor and the stator; 
 a wall provided between an inner circumference of the stator and an outer circumference of the rotor to partition the stator and the rotor from each other; and 
 a motor side discharge port to discharge the oil inside the motor; 
   the pump includes:
 a pump rotor attached to the shaft; 
 a pump case accommodating the pump rotor; 
 a pump side suction port to suction the oil into the pump using a negative pressure in the pump; and 
 a pump side delivery port to deliver the oil inside the pump to the inside of the motor using pressurization of the pump; and 
   the pump apparatus further comprises:
 a first flow channel to cause the oil to flow into the pump through the pump side suction port; 
 a second flow channel to cause the oil to flow to a region on a side which is partitioned by the wall and on which the stator is present inside the motor, through the pump side delivery port; and 
 a third flow channel provided inside the stator to cause the oil to flow into the stator. 
   
     
     
         16 . A pump apparatus comprising:
 a motor including a shaft rotatably supported about a central axis extending in an axial direction; and   a pump that is positioned on one side of the motor in the axial direction, is driven by the motor via the shaft, and discharges an oil; wherein   the motor includes:
 a rotor rotatable around the shaft; 
 a stator disposed on an outer side of the rotor in a radial direction; 
 a housing accommodating the rotor and the stator; 
 a wall provided between an inner circumference of the stator and an outer circumference of the rotor to partition the stator and the rotor from each other; and 
 a motor side suction port to suction the oil into the motor between the housing and the wall; 
   the pump includes:
 a pump rotor attached to the shaft; 
 a pump case accommodating the pump rotor; and 
 a pump side introduction port to introduce the oil inside the motor into the pump using a negative pressure in the pump; and 
   the pump apparatus includes:
 a fourth flow channel to cause the oil to flow into the motor through the motor side suction port; 
 a third flow channel provided inside the stator to cause the oil to flow into the stator; and 
 a fifth flow channel to introduce the oil inside the motor into the pump through the pump side introduction port. 
   
     
     
         17 . The pump apparatus according to  claim 15 , wherein the stator includes:
 a cylindrical core back portion provided to surround the central axis;   a plurality of teeth portions provided at predetermined intervals in a circumferential direction to protrude to the rotor side from an inner surface of the core back portion; and   a coil wound around the teeth portion; wherein   
       the third flow channel is provided between the coils respectively wound around a pair of teeth portions adjacent to each other in the circumferential direction. 
     
     
         18 . The pump apparatus according to  claim 17 , further comprising:
 a sixth flow channel to cause the oil to flow between the core back portion and the housing.   
     
     
         19 . The pump apparatus according to  claim 17 , wherein the coil is resin-molded. 
     
     
         20 . The pump apparatus according to  claim 15 , wherein the wall includes a cylinder portion covering an outer circumferential surface of the rotor and extending in the axial direction of the shaft. 
     
     
         21 . The pump apparatus according to  claim 20 , wherein in the cylinder portion, a first end portion of the cylinder portion in the axial direction comes into contact with the pump case and a second end portion of the cylinder portion in the axial direction comes into contact with a second end portion of the housing in the axial direction. 
     
     
         22 . The pump apparatus according to  claim 17 , wherein the wall and the stator are integrally molded structures made of a resin. 
     
     
         23 . The pump apparatus according to  claim 21 , wherein the cylinder portion comes into contact with the pump case via a seal. 
     
     
         24 . The pump apparatus according to  claim 23 , wherein a recessed portion is provided in any one of contact portions of the cylinder portion and the pump case which come into contact with each other via the seal, and the seal is inserted into the recessed portion. 
     
     
         25 . The pump apparatus according to  claim 21 , wherein the cylinder portion comes into contact with the second end portion of the housing of the motor in the axial direction via a seal. 
     
     
         26 . The pump apparatus according to  claim 25 , wherein a recessed portion is provided in any one of contact portions of the cylinder portion and the second end portion of the housing in the axial direction which come into contact with each other via the seal, and the seal is inserted into the recessed portion. 
     
     
         27 . The pump apparatus according to  claim 15 , wherein a space surrounded by the stator, the wall, and the housing to be able to be filled with the oil is provided between an end portion of the stator in the axial direction and an end portion of the housing in the axial direction inside the motor. 
     
     
         28 . The pump apparatus according to  claim 16 , wherein a space surrounded by the stator, the wall, and the housing to be able to be filled with the oil is provided between an end portion of the stator in the axial direction and an end portion of the housing in the axial direction inside the motor.