Abstract: A vane pump includes: a rotor configured to rotate under rotational force from a rotary shaft while supporting multiple vanes and including a curved surface portion with an arc shape centered on the rotary shaft and a rotor recess depressed from the curved surface portion toward a rotation center; a cam ring disposed so as to surround the rotor and including an inner peripheral surface facing the curved surface portion of the rotor; and an inner plate disposed on one end of the cam ring in an axial direction of the rotary shaft so as to cover an opening of the cam ring and including a suction inner recess depressed toward the rotation center relative to the curved surface portion of the rotor.

Abstract: An embodiment provides a vane pump device including a pump unit that includes a high pressure side discharge through-hole which discharges oil, and a low pressure side discharge through-hole which discharges oil; and a housing which accommodates the pump unit, and includes a high pressure side discharge passage that is formed between the high pressure side discharge through-hole and a high pressure side discharge outlet through which oil discharged from the high pressure side discharge through-hole of the pump unit is discharged to the outside, and a cover low pressure side discharge passage and a case low pressure side discharge passage that are formed between the low pressure side discharge through-hole and a low pressure side discharge outlet through which oil is discharged to the outside, and that are shorter than the high pressure side discharge passage.

Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction, and supplies oil to the columnar grooves. An outer-plate low pressure side through-hole and an outer-plate low pressure side recess portion are provided in an end surface of an outer plate along the rotation direction, and supply oil to the columnar grooves at a position facing the inner-plate low pressure side recess portion. An opening area of the inner-plate low pressure side recess portion is equal to a sum of opening areas of the outer-plate low pressure side through-hole and the outer-plate low pressure side recess portion.

Abstract: An embodiment provides a vane pump device including a rotation shaft; and a pump unit that discharges oil at multiple discharge pressures, discharges oil to one side in an axial direction of the rotation shaft at a first discharge pressure of the multiple discharge pressures, and discharges oil to the other side in the axial direction at a second discharge pressure of the multiple discharge pressures.

Abstract: 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.

Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction of the rotor, and supplies oil to the columnar grooves. It includes a low pressure side upstream recess portion, a low pressure side downstream recess portion, and a low pressure side connection recess portion that connects the low pressure side upstream recess portion and the low pressure side downstream recess portion. The width of the low pressure side downstream recess portion is narrower than that of the low pressure side upstream recess portion. The width of the low pressure side connection recess portion is equal to that of the low pressure side downstream recess portion.

Abstract: An embodiment provides a vane pump device includes multiple vanes; a rotor that includes vane grooves which movably support the vanes and which are formed with columnar grooves accommodating oil on rotation center side, and that rotates due to a rotating force received from a rotation shaft; a cam ring that surrounds the rotor; and an inner plate 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. The inner plate includes a first portion that is provided to face the grooves, and supplies low pressure oil to the grooves, and a second portion which is provided to face the grooves, supplies high pressure oil to the grooves, and has a width in a radial direction of rotation which is different from that of the first portion in the radial direction of rotation.

Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion and an inner-plate high pressure supply region are provided along a rotation direction of the rotor. The inner-plate low pressure side recess portion supplies oil to the columnar grooves at a first pressure, and the inner-plate high pressure supply region supplies oil at a second pressure higher than the first pressure. A size from an inner-plate low pressure side recess portion downstream end to an inner-plate high pressure side through-hole upstream end in the rotation direction is different from that from an inner-plate high pressure side recess portion downstream end to an inner-plate low pressure side recess portion upstream end in the rotation direction.

Abstract: An embodiment provides a vane pump device includes multiple vanes; a rotor that includes vane grooves which support the vanes so that the vanes can move in a radial direction of rotation and which form columnar grooves accommodating oil 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 an outer circumferential surface of the rotor, and surrounds the rotor; and an inner plate that covers an opening of the cam ring. The inner plate includes a first recess portion that supplies low pressure oil to the columnar grooves, a second recess portion that is formed away from the first recess portion, and supplies high pressure oil to the columnar grooves, and an inner-plate first groove connected to the first recess portion and the second recess portion.

Abstract: An embodiment provides a vane pump device includes multiple vanes; a rotor that rotates and includes vane grooves for supporting the vanes and accommodating oil; a cam ring that includes an inner circumferential cam ring surface provided with a high pressure region and a low pressure region, and that surrounds the rotor; and an inner plate that covers an opening of the cam ring. The inner plate includes a first portion that supplies high pressure oil to the vane grooves, and a second portion that supplies low pressure oil to the vane grooves. Among vane grooves which support vanes positioned in the high pressure region of the cam ring, the first portion supplies high pressure oil to vane grooves, the number of which is less than the number of vanes positioned in the high pressure region.

Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction of the rotor, and supplies oil to the columnar grooves. It includes a low pressure side upstream recess portion, a low pressure side downstream recess portion, and a low pressure side connection recess portion through which the low pressure side upstream recess portion is connected to the low pressure side downstream recess portion. The width of the low pressure side upstream recess portion is equal to that of the low pressure side downstream recess portion. The width of the low pressure side connection recess portion is narrower than that of the low pressure side upstream recess portion.

Abstract: Disclosed is a vane pump device including: an even number of vanes; a rotor; a cam ring; an inner plate; and an outer plate. An inner-plate high pressure side through-hole and an inner-plate low pressure side recess portion are formed separately from each other in a rotation direction in cam ring side end surfaces of the inner plate and the outer plate, and communicate with a columnar groove which is a space of a vane groove on a rotation center side. The position of an inner-plate high pressure side through-hole upstream end and the position of an inner-plate low pressure side recess portion upstream end are point-symmetrical with each other with respect to the rotation center.

Abstract: An embodiment provides an inner plate including a high pressure side discharge through-hole through which a working fluid is discharged from a pump chamber; an inner-plate high pressure side through-hole through which the working fluid is guided to a columnar groove of a vane groove; and an inner-plate high pressure side recess portion that is a groove facing a columnar groove among multiple columnar grooves. An outer plate includes a high pressure side upstream recess portion; a high pressure side downstream recess portion; and a high pressure side connection recess portion through which the high pressure side upstream recess portion and the high pressure side downstream recess portion are connected to each other, and which has a passage area smaller than that of the high pressure side downstream recess portion.

Abstract: An embodiment provides a vane pump device includes a pump unit that includes a high pressure side discharge through-hole which discharges oil at a first discharge pressure, and a low pressure side discharge through-hole which discharges oil at a second discharge pressure lower than the first discharge pressure; and a housing which accommodates the pump unit, and includes a high pressure side discharge outlet through which oil discharged from the high pressure side discharge through-hole of the pump unit is discharged to the outside, and a low pressure side discharge outlet through which oil discharged from the low pressure side discharge through-hole is discharged to the outside, and in which the high pressure side discharge outlet and the low pressure side discharge outlet are formed to face the same direction.

Abstract: An inner-plate cam ring side recess portion is formed in a cam ring side end surface of an inner plate, communicates with a columnar groove which is a center side space in vane grooves, and supplies a working fluid to the columnar groove. The inner-plate cam ring side recess portion is divided into multiple sections between a first side discharge port, through which the working fluid is discharged at a first discharge pressure from a pump chamber, and a second side suction port through which the working fluid is suctioned into a pump chamber discharging the working fluid at a second discharge pressure. The size of a separation portion in a rotation direction is larger than that of the columnar groove of the vane groove in the rotation direction.

Abstract: An inner-plate cam ring side recess portion is formed in a cam ring side end surface of an inner plate, communicates with a columnar groove which is a center side space in a vane grooves, and supplies a working fluid to the columnar groove. The inner-plate cam ring side recess portion is divided into multiple sections between a first side discharge port, through which the working fluid is discharged at a first discharge pressure from a pump chamber, and a second side suction port through which the working fluid is suctioned into a pump chamber discharging the working fluid at a second discharge pressure. An angle of a separation portion in a rotation direction is smaller than or equal to an angle between the first side discharge port and the second side suction port.

Abstract: An embodiment provides a vane pump device includes multiple vanes; a rotor that includes vane grooves which movably support the vanes and which are formed with columnar grooves accommodating oil on rotation center side, and that rotates due to a rotating force received from a rotation shaft; a cam ring that surrounds the rotor; and an inner plate 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. The inner plate includes a first portion that is provided to face the grooves, and supplies low pressure oil to the grooves, and a second portion which is provided to face the grooves, supplies high pressure oil to the grooves, and has a width in a radial direction of rotation which is different from that of the first portion in the radial direction of rotation.

Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction, and supplies oil to the columnar grooves. An outer-plate low pressure side through-hole and an outer-plate low pressure side recess portion are provided in an end surface of an outer plate along the rotation direction, and supply oil to the columnar grooves at a position facing the inner-plate low pressure side recess portion. An opening area of the inner-plate low pressure side recess portion is equal to a sum of opening areas of the outer-plate low pressure side through-hole and the outer-plate low pressure side recess portion.

Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction of the rotor, and supplies oil to the columnar grooves. It includes a low pressure side upstream recess portion, a low pressure side downstream recess portion, and a low pressure side connection recess portion that connects the low pressure side upstream recess portion and the low pressure side downstream recess portion. The width of the low pressure side downstream recess portion is narrower than that of the low pressure side upstream recess portion. The width of the low pressure side connection recess portion is equal to that of the low pressure side downstream recess portion.

Abstract: An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion and an inner-plate high pressure supply region are provided along a rotation direction of the rotor. The inner-plate low pressure side recess portion supplies oil to the columnar grooves at a first pressure, and the inner-plate high pressure supply region supplies oil at a second pressure higher than the first pressure. A size from an inner-plate low pressure side recess portion downstream end to an inner-plate high pressure side through-hole upstream end in the rotation direction is different from that from an inner-plate high pressure side recess portion downstream end to an inner-plate low pressure side recess portion upstream end in the rotation direction.