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公开(公告)号：US20180149153A1
公开(公告)日：2018-05-31
申请号：US15578437
申请日：2016-06-01
Applicant: KYB Corporation
Inventor： Koichiro AKATSUKA , Tomoyuki FUJITA , Tomoyuki NAKAGAWA , Fumiyasu KATOU , Hiroki GOMI
CPC classification number: F04C2/344 , F01C21/0863 , F01C21/108 , F04C2/3446 , F04C11/00 , F04C11/001 , F04C14/02 , F04C14/26 , F04C15/0049 , F04C15/06 , F04C2270/12 , F04C2270/13
Abstract: A pump device includes: a main pump and a sub pump; and a switching valve that switches so as to supply the hydraulic oil discharged from the sub pump to the hydraulic device, or to return the hydraulic oil discharged from the sub pump to the suction side. The main pump and the sub pump each include: a rotor, a discharge port into which the hydraulic oil discharged from a pump chamber is led, and a groove-shaped discharge-side notch formed from an opening edge of the discharge port toward a direction opposite to a rotation direction of the rotor. The switching valve switches according to a rotation speed of the drive shaft. At least one discharge-side notch of the sub pump is formed so that a resistance applied to the flow of the hydraulic oil passing therethrough is greater than that of the discharge-side notch of the main pump.
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公开(公告)号：US20220178369A1
公开(公告)日：2022-06-09
申请号：US17600549
申请日：2020-03-03
Applicant: KYB Corporation
Inventor： Kouhei KUBO , Tomoyuki FUJITA , Koichiro AKATSUKA , Yoshiyuki MAKI
IPC: F04C15/00 , F04C18/344 , F04C2/344
Abstract: A vane pump is provided with: a pump housing having an accommodating concave portion; and a pump cartridge accommodated in the accommodating concave portion, wherein the pump cartridge has: a rotor; a plurality of vanes received in a plurality of slits formed in the rotor; a cam ring formed with a cam face on an inner circumference of the cam ring; and a first side plate provided at the opposite side from a bottom surface of the accommodating concave portion such that the cam ring is located therebetween, the first side plate has a first projected portion projected radially outward, and the pump cartridge is anchored to the pump housing via the first projected portion.
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公开(公告)号：US20180258931A1
公开(公告)日：2018-09-13
申请号：US15759990
申请日：2016-08-29
Applicant: KYB Corporation
Inventor： Koichiro AKATSUKA , Tomoyuki FUJITA , Hiroki GOMI , Shota SHINDO
CPC classification number: F04C15/0003 , F04C2/324 , F04C2/344 , F04C15/00 , F04C15/06
Abstract: A vane pump includes a pump cartridge that is accommodated in an accommodating space defined by the concave portion and the pump cover. The pump cartridge includes a first side plate that is provided between the bottom portion of the concave portion in the pump body and a cam ring; first pins that are provided so as to extend from the cam ring to the first side plate; and second pins that are provided so as to extend from the first side plate to the pump body.
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公开(公告)号：US20190390670A1
公开(公告)日：2019-12-26
申请号：US16333116
申请日：2017-09-08
Applicant: KYB Corporation
Inventor： Koichiro AKATSUKA , Hiroki GOMI , Fumihiko SOBUE
Abstract: A vane pump includes: a rotor connected to a driving shaft; a plurality of vanes provided so as to be capable of reciprocating in a radial direction with respect to the rotor; a cam ring having a cam face on which a tip-ends of the vanes slide with the rotation of the rotor, the cam ring being provided so as to be capable of being made eccentric with respect to the rotor; a second pump body configured to accommodate the cam ring; and a spring interposed between the cam ring and the second pump body in a compressed state, the spring being configured to bias the cam ring in the direction in which the amount of eccentricity with respect to the rotor is increased. The cam ring and the second pump body have seating surfaces on which the spring is seated and grooves formed in the seating surfaces.
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公开(公告)号：US20190301452A1
公开(公告)日：2019-10-03
申请号：US16344681
申请日：2017-11-08
Applicant: KYB Corporation
Inventor： Koichiro AKATSUKA , Yoshiyuki MAKI
Abstract: A vane pump includes a pump rotor having a through hole to which a driving shaft is coupled, a pump housing configured to accommodate the pump rotor and the cam ring, and a first side plate provided between the pump rotor and a bottom surface of the pump housing. The first side plate or the pump housing is formed with a projection, the projection is inserted into the through hole of the pump rotor.
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Patent Agency Ranking
公开(公告)号：US20160333876A1
公开(公告)日：2016-11-17
申请号：US15111188
申请日：2015-01-19
Applicant: KYB Corporation
Inventor： Tomoyuki FUJITA , Koichiro AKATSUKA , Fumiyasu KATO , Hiroki GOMI
CPC classification number: F04C15/06 , F01C21/0863 , F04C2/3446 , F04C15/0049 , F04C2210/206 , F04C2240/20 , F04C2250/102 , F04C2250/30
Abstract: A vane pump used as a fluid pressure source includes: a rotor that is rotationally driven; a plurality of vanes that are inserted into the rotor in a freely slidable manner; a cam ring at which tip-end portions of the vanes slides as the rotor rotates; a pump chamber that is defined between the adjacent vanes; a suction port that guides working fluid to the pump chamber; a discharge port through which the working fluid discharged from the pump chamber is guided; a groove-like notch that extends from an opening edge of the discharge port in an opposite direction from rotation direction of the rotor, and the notch has a gradient-changing portion at which a rate of change of opening area is decreased in the rotation direction of the rotor.
Abstract translation: 用作流体压力源的叶片泵包括：旋转驱动的转子; 以可自由滑动的方式插入转子中的多个叶片; 凸轮环，当转子旋转时，叶片的尖端部分滑动; 在相邻叶片之间限定的泵室; 将工作流体引导到泵室的吸入口; 引导从泵室排出的工作流体的排出口; 从所述排出口的开口边缘沿与所述转子的旋转方向相反的方向延伸的槽状切口，所述切口具有梯度变化部，所述切口部的开口面积的变化率在旋转方向上减小 的转子。
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公开(公告)号：US20200347844A1
公开(公告)日：2020-11-05
申请号：US16765133
申请日：2018-11-09
Applicant: KYB Corporation
Inventor： Fumiyasu KATO , Koichiro AKATSUKA
Abstract: A vane pump includes a rotor having slits, vanes received in the slits, a cam ring having an inner circumference cam face with which the vanes are brought into sliding contact, side members, pump chamber formed by the rotor, the cam ring, adjacent vanes, and back pressure chambers formed in the slits by the vanes. In the vane pump, the side members are provided with back pressure opening portions opening at sliding-contact surfaces in sliding contact with the rotor, the back pressure opening portions being configured to communicate with the back pressure chambers, and protruding opening portions protruding along the rotating direction of the rotor from end portions of the back pressure opening portions on the communication-finishing side. And inner-side inner circumferential surfaces of the protruding opening portions are respectively connected to inner-side inner circumferential surfaces of the back pressure opening portions.
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公开(公告)号：US20170227007A1
公开(公告)日：2017-08-10
申请号：US15502938
申请日：2015-08-24
Applicant: KYB Corporation
Inventor： Koichiro AKATSUKA , Tomoyuki FUJITA , Tomoyuki NAKAGAWA , Fumiyasu KATOU , Hiroki GOMI
CPC classification number: F04C14/26 , F01C21/0863 , F04C2/344 , F04C2/3446 , F04C14/08 , F04C14/24 , F04C15/064 , F04C2270/185
Abstract: A pump device includes a flow control valve that returns a part of working fluid discharged from a pump to the suction side, and the flow control valve includes a valve body, a first fluid pressure chamber that is provided so as to face against a first-side end surface of the valve body and that is communicated with a discharge channel, a second fluid pressure chamber that is provided so as to face against a second-side end surface of the valve body and that is communicated with the discharge channel, a biasing member that is accommodated in the second fluid pressure chamber for biasing the valve body in the valve-closing direction, and a pressure regulator that is provided in a communicating passage through which the discharge channel is communicated with the second fluid pressure chamber and that adjusts pressure in the second fluid pressure chamber.
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公开(公告)号：US20210348620A1
公开(公告)日：2021-11-11
申请号：US17268926
申请日：2019-10-29
Applicant: KYB Corporation , NIDEC TOSOK CORPORATION
Inventor： Kohei KUBO , Tomoyuki FUJITA , Koichiro AKATSUKA , Yoshiyuki MAKI , Koji HIGUCHI , Yutaka HASHIMOTO
IPC: F04D29/043 , F04D13/06
Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.
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公开(公告)号：US20180306184A1
公开(公告)日：2018-10-25
申请号：US15767791
申请日：2016-09-16
Applicant: KYB Corporation
Inventor： Yoshinari NAKAMURA , Shinji YAKABE , Kazunari SUZUKI , Koichiro AKATSUKA , Hirohito WATANABE
CPC classification number: F04C15/06 , F04C2/344 , F04C2/3446 , F04C2240/10
Abstract: A vane pump includes a rotor; a plurality of vanes; a cam ring; a second side plate; a suction port provided in the second side plate, the suction port being configured to guide working fluid to the pump chambers; a pump cover arranged so as to sandwich the second side plate with the cam ring; and a low-pressure chamber formed in the pump cover, the low-pressure chamber having an opening portion communicating with the suction port. The suction port is arranged so as to be shifted towards a forward side of in a rotating direction of the rotor with respect to the opening portion of the low-pressure chamber.
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