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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：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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Patent Agency Ranking
公开(公告)号：US20180112661A1
公开(公告)日：2018-04-26
申请号：US15568844
申请日：2016-04-19
Applicant: KYB Corporation
Inventor： Koichiro AKATSUKA , Tomoyuki FUJITA , Tomoyuki NAKAGAWA , Fumiyasu KATOU , Hiroki GOMI
CPC classification number: F04C14/26 , F04B2201/1213 , F04C2/344 , F04C14/22 , F04C14/223 , F04C14/24 , F04C2210/206 , F04C2270/20 , F04C2270/215 , F04C2270/585
Abstract: A variable displacement vane pump includes: a control orifice that imparts resistance to a flow of working oil discharged from pump chambers; a flow-amount control valve that operates in accordance with an upstream-downstream differential pressure of the control orifice and controls a flow amount of the working oil discharged from the pump chambers; a variable control valve that is operated by the working oil that has passed through the control orifice and controls an amount of eccentricity of a cam ring with respect to a rotor by controlling a pressure difference between a first fluid pressure chamber and a second fluid pressure chamber; and a return passage that is connected to the flow-amount control valve and circulates a part of the working oil discharged from the pump chambers through a suction passage.
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公开(公告)号：US20160377078A1
公开(公告)日：2016-12-29
申请号：US15125837
申请日：2015-09-02
Applicant: KYB Corporation
Inventor： Koichiro AKATSUKA , Tomoyuki FUJITA , Tomoyuki NAKAGAWA , Fumiyasu KATOU , Hiroki GOMI
CPC classification number: F04C14/26 , F04C2/3446 , F04C15/06 , F04C2210/206 , F04C2240/10 , F04C2240/20 , F04C2270/215 , F04C2270/585 , F04C2270/86
Abstract: A pump device includes a pump, a flow control valve having a spool that returns a part of working fluid discharged from the pump to a suction side, and a differential pressure adjusting device that adjusts a differential pressure acting on both end portions of the spool to a target differential pressure, and the differential pressure adjusting device includes a pressure regulating chamber that communicates with a second fluid pressure chamber and a pilot chamber into which pressure in the discharge channel is guided: and a pressure in the pressure regulating chamber is adjusted such that a differential pressure between the pressure in the pressure regulating chamber and a pressure in the pilot chamber becomes the target differential pressure.
Abstract translation: 泵装置包括泵，流量控制阀，其具有将从泵排出的工作流体的一部分返回到吸入侧的阀芯，以及调节作用于阀芯的两端部的压差的压差调节装置， 目标压差，压差调节装置包括与第二流体压力室和引导室连通的压力调节室，排气通道中的压力被引导到该导向室中;压力调节室中的压力被调整为使得 压力调节室中的压力与先导室中的压力之间的压差成为目标压差。
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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：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：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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