Vane pump device for controlling deviation of a force applied to the vanes
In a vane pump device, an inner plate is provided with a low pressure side upstream recess portion; a low pressure side downstream recess portion that is positioned on the downstream side of the low pressure side upstream recess portion in a rotation direction of a rotor; and a low pressure side connection recess portion that connects to the low pressure side upstream recess portion and the low pressure side downstream recess portion. An outer plate includes an outer-plate low pressure side through-hole through which oil is supplied to the low pressure side upstream recess portion via columnar grooves of the rotor; an outer-plate low pressure side recess portion into which oil flows from the low pressure side downstream recess portion via the columnar grooves; and an outer-plate connection portion through which connects to the outer-plate low pressure side through-hole and the outer-plate low pressure side recess portion.
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 such that the vanes are supported in such a way as to move in a radial direction of rotation, and which form center side spaces accommodating a working fluid on a rotation center side, 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 surrounds the rotor;
one cover 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 cover 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 a first supply path is provided in a cam ring side end surface of the one cover member along a rotation direction of the rotor, and supplies the working fluid to the center side spaces,
wherein a second supply path is provided in a cam ring side end surface of the other cover member along the rotation direction of the rotor, and supplies the working fluid to the center side spaces at a position corresponding to the first supply path,
wherein the first supply path includes;
a first accommodation portion that accommodates the working fluid,
a second accommodation portion that is positioned on a downstream side of the first accommodation portion in the rotation direction, and
a first connection portion that connects the first accommodation portion and the second accommodation portion, and
wherein the second supply path includes;
a supply portion that supplies the working fluid to the first accommodation portion via the center side spaces,
an inflow portion that is provided on a downstream side of the supply portion in the rotation direction, the working fluid flowing from the second accommodation portion into the inflow portion via the center side spaces, and
a second connection portion that connects to the supply portion and the inflow portion.
2. The vane pump device according to claim 1 , wherein the supply portion is a through-hole that is provided in the other cover member.
3. The vane pump device according to claim 1 , wherein the second connection portion is provided at a position corresponding to the first connection portion.
4. The vane pump device according to claim 1 , wherein the first connection portion reduces a passage of the working fluid flows between the first accommodation portion and the second accommodation portion.
5. The vane pump device according to claim 1 , wherein a flow of the working fluid through the second connection portion is more restricted than a flow of the working fluid through the first connection portion.
6. The vane pump device according to claim 1 , wherein a width of the second connection portion in the radial direction of rotation is narrower than a width of the first connection portion in the radial direction of rotation.
7. A vane pump device comprising:
multiple vanes;
a rotor that includes vane grooves which are recessed from an outer circumferential surface of the rotor such that the vanes are supported in such a way as to move in a radial direction of rotation, and which form center side spaces accommodating a working fluid on a rotation center side, 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 surrounds the rotor;
one cover 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 cover 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 a first fluid path and a second fluid path are provided in a cam ring side end surface of the one cover member along a rotation direction of the rotor, and supply the working fluid to the center side spaces,
wherein a third fluid path, which supplies the working fluid to the center side spaces at a position corresponding to the first fluid path, and a fourth fluid path, which supplies the working fluid to the center side spaces at a position corresponding to the second fluid path, are provided in a cam ring side end surface of the other cover member along the rotation direction of the rotor,
wherein the first fluid path includes;
a first accommodation portion that accommodates the working fluid,
a second accommodation portion that is positioned on a downstream side of the first accommodation portion in the rotation direction, and
a first connection portion that connects to the first accommodation portion and the second accommodation portion,
wherein the third fluid path includes;
a first through-hole that supplies the working fluid to the first accommodation portion via the center side spaces,
a first inflow portion that is positioned on a downstream side of the first through-hole in the rotation direction, the working fluid flowing from the second accommodation portion into the first inflow portion via the center side spaces, and
a second connection portion that connects to the first through-hole and the first inflow portion,
wherein the fourth fluid path includes;
a third accommodation portion that accommodates the working fluid,
a fourth accommodation portion that is positioned on a downstream side of the third accommodation portion in the rotation direction, and
a third connection portion that connects to the third accommodation portion and the fourth accommodation portion,
wherein the second fluid path includes;
a second through-hole that supplies the working fluid to the third accommodation portion via the center side spaces,
a second inflow portion that is positioned on a downstream side of the second through-hole in the rotation direction, the working fluid flowing from the fourth accommodation portion into the second inflow portion via the center side spaces, and
a fourth connection portion that connects to the second through-hole and the second inflow portion,
wherein a width of the second connection portion in the radial direction of rotation is narrower than a width of the first connection portion in the radial direction of rotation, and
wherein a width of the fourth connection portion in the radial direction of rotation is narrower than a width of the third connection portion in the radial direction of rotation.