Supplying pressurized fluid to the vane groove for a vane pump device

1. A vane pump device comprising:

multiple vanes;

a rotor that includes vane grooves which are recessed from an outer circumferential surface of the rotor in a radial direction of rotation such that the vanes are supported in such a way as to be capable of moving in the radial direction of rotation, and that rotates due to a rotating force received from a rotation shaft;

a cam ring that includes an inner circumferential surface facing the outer circumferential surface of the rotor, and is disposed to surround the rotor;

a one side member that is disposed on one end portion side of the cam ring in a direction of a rotation axis to cover an opening of the cam ring; and

another side member that is disposed on another end portion side of the cam ring in the direction of the rotation axis to cover an opening of the cam ring,

wherein the one side member includes:

a one side first through-hole through which a working fluid is discharged from a pump chamber;

a one side second through-hole through which the working fluid discharged from the one side first through-hole is guided to a center side space that is a space of a vane groove which is positioned at a rotation center side; and

a one side groove that faces a center side space among multiple center side spaces which is different from a center side space communicating with the one side second through-hole, and

wherein the other side member includes:

another side first recess portion that faces the one side second through-hole;

another side second recess portion that faces the one side groove; and

another side third recess portion through which the other side first recess portion and the other side second recess portion are connected to each other, and which has a passage area smaller than that of the other side second recess portion.

2. The vane pump device according to claim 1 ,

wherein the other side member includes:

another side first through-hole through which the working fluid is discharged from a pump chamber;

another side second through-hole through which the working fluid discharged from the other side first through-hole is guided to the center side space; and

another side groove that faces the center side space among the multiple center side spaces which is different from the center side space communicating with the other side second through-hole, and

wherein the one side member includes:

a one side first recess portion that faces the other side second through-hole;

a one side second recess portion that faces the other side groove; and

a one side third recess portion through which the one side first recess portion and the one side second recess portion are connected to each other, and which has a passage area smaller than that of the one side second recess portion.

3. The vane pump device according to claim 2 ,

wherein multiple pump chambers are formed to discharge the working fluid at multiple different discharge pressures during one revolution of the rotation shaft, and each of the multiple pump chambers is formed by the two adjacent vanes, the outer circumferential surface of the rotor, the inner circumferential surface of the cam ring, the one side member, and the other side member, and

wherein the working fluid discharged at a first discharge pressure from a pump chamber is discharged from the one side first through-hole, and

wherein the working fluid discharged at a second discharge pressure is discharged from the other side first through-hole.

4. The vane pump device according to claim 3 ,

wherein the one side groove and the one side first recess portion of the one side member are separated from each other between a first side discharge port, through which the working fluid is discharged at the first discharge pressure from the pump chamber, and a second side suction port through which the working fluid is suctioned into a pump chamber discharging the working fluid at the second discharge pressure, and

wherein the other side groove and the other side first recess portion of the other side member are separated from each other between a second side discharge port, through which the working fluid is discharged at the second discharge pressure from the pump chamber, and a first side suction port through which the working fluid is suctioned into the pump chamber discharging the working fluid at the first discharge pressure.

5. The vane pump device according to claim 1 , further comprising:

a housing that accommodates the multiple vanes, the rotor, the cam ring, the one side member, and the other side member, and that includes a first discharge outlet through which the working fluid discharged at a first discharge pressure is discharged to the outside, and a second discharge outlet through which the working fluid discharged at a second discharge pressure is discharged to the outside.

6. A vane pump device comprising:

multiple vanes;

a rotor that includes vane grooves which are recessed from an outer circumferential surface of the rotor in a radial direction of rotation such that the vanes are supported in such a way as to be capable of moving in the radial direction of rotation, and that rotates due to a rotating force received from a rotation shaft;

a cam ring that includes an inner circumferential surface facing the outer circumferential surface of the rotor, and is disposed to surround the rotor;

a one side member that is disposed on one end portion side of the cam ring in a direction of a rotation axis to cover an opening of the cam ring; and

another side member that is disposed on the other end portion side of the cam ring in the direction of the rotation axis to cover an opening of the cam ring,

wherein the other side member includes:

another side first through-hole through which a working fluid is discharged from a pump chamber;

another side second through-hole through which the working fluid discharged from the other side first through-hole is guided to a center side space that is a space of a vane groove which is positioned at a rotation center side; and

another side groove that faces a center side space among multiple center side spaces which is different from a center side space communicating with the other side second through-hole, and

wherein a one side member includes:

a one side first recess portion that faces the other side second through-hole;

a one side second recess portion that faces the other side groove; and

a one side third recess portion through which the one side first recess portion and the one side second recess portion are connected to each other, and which has a passage area smaller than that of the one side second recess portion.

7. The vane pump device according to claim 6 ,

wherein the one side member includes:

a one side first through-hole through which the working fluid is discharged from a pump chamber;

a one side second through-hole through which the working fluid discharged from the one side first through-hole is guided to a center side space; and

a one side groove that faces a center side space among the multiple center side spaces which is different from a center side space communicating with the one side second through-hole, and

wherein the other side member includes:

another side first recess portion that faces the one side second through-hole;

another side second recess portion that faces the one side groove; and

another side third recess portion through which the other side first recess portion and the other side second recess portion are connected to each other, and which has a passage area smaller than that of the other side second recess portion.