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公开(公告)号：US20160305426A1
公开(公告)日：2016-10-20
申请号：US15096665
申请日：2016-04-12
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
CPC classification number: F04C2/102 , F02M59/12 , F04C2/084 , F04C11/008 , F04C15/0061 , F04C15/0076 , F04C15/008 , F04C2210/1044 , F04C2210/203 , F04C2240/30
Abstract: An inner gear includes an insertion hole, which extends through the inner gear in an axial direction, and a first balance groove, which is axially recessed at an axial end portion of the inner gear and is communicated with the insertion hole. First and second chamfered portions are formed in an inner peripheral edge of the inner gear, which is adjacent to the insertion hole. A joint member has a leg inserted into the insertion hole. An inserting direction of the leg into the insertion hole is defined as a first direction, and a direction, which is opposite from the first direction, is defined as a second direction. In a view taken in a direction perpendicular to the axial direction, at least a part of a first direction side end portion of the leg is axially placed between a first chamfered end plane and a first groove end plane.
Abstract translation: 内齿轮包括沿轴向延伸穿过内齿轮的插入孔和在内齿轮的轴向端部轴向凹入并与插入孔连通的第一平衡槽。 第一和第二倒角部分形成在与插入孔相邻的内齿轮的内周边缘中。 接合构件具有插入到插入孔中的腿。 将脚插入插入孔的方向被定义为第一方向，并且将与第一方向相反的方向定义为第二方向。 沿着与轴向垂直的方向观察，腿的第一方向侧端部的至少一部分轴向地设置在第一倒角端面与第一槽端面之间。
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公开(公告)号：US20160298625A1
公开(公告)日：2016-10-13
申请号：US15096657
申请日：2016-04-12
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
CPC classification number: F04C2/102 , F04C15/0092 , F04C15/06 , F04C2210/1044 , F04C2240/50 , F04C2240/56 , F05C2253/20
Abstract: A pump housing receives an outer rotor and an inner rotor. A joint member couples between a rotatable shaft and the inner rotor to transmit a rotational torque from the rotatable shaft to the inner rotor. A radial bearing is shaped into a cylindrical tubular form. A cylindrical inner peripheral surface of the radial bearing rotatably and slidably supports the rotatable shaft. A cylindrical outer peripheral surface of the radial bearing rotatably and slidably supports an inner peripheral surface of the inner rotor. A lubrication groove is formed in the cylindrical outer peripheral surface of the radial bearing and accumulates fluid, which is present in an inside of the pump housing.
Abstract translation: 泵壳体容纳外转子和内转子。 联接构件联接在可旋转轴和内转子之间，以将旋转扭矩从可旋转轴传递到内转子。 径向轴承成形为圆柱形管状。 径向轴承的圆柱形内周面可旋转并可滑动地支撑旋转轴。 径向轴承的圆柱形外周表面可旋转并可滑动地支撑内转子的内周表面。 在径向轴承的圆筒形外周面上形成润滑槽，并且积聚存在于泵壳体内部的流体。
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公开(公告)号：US20160298624A1
公开(公告)日：2016-10-13
申请号：US15096625
申请日：2016-04-12
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
CPC classification number: F04C2/102 , F02M37/10 , F04C2/084 , F04C2/086 , F04C15/06 , F04C2210/1044 , F04C2250/101
Abstract: A suction groove is formed in an inside wall surface of a pump cover and is communicated with a suction passage of the pump cover. The suction groove extends along a rotational path of external teeth of an inner rotor and a rotational path of internal teeth of an outer rotor. An edge of a portion of the pump cover, which forms the suction groove, includes chamfered edge parts, which are chamfered, and unchamfered edge parts, which are not chamfered and are not rounded. Each of the unchamfered edge parts is located in a direct-inflow region of the suction groove, which overlaps with the suction passage in a view taken in a direction of a rotational axis, and each of the chamfered edge parts is located in a corresponding one of peripheral regions, which are other than the direct-inflow region.
Abstract translation: 在泵盖的内壁面形成有吸入槽，与泵盖的吸入通路连通。 吸入槽沿内转子的外齿的旋转路径和外转子的内齿的旋转路径延伸。 形成抽吸槽的泵盖的一部分的边缘包括倒角的倒角边缘部分和未被倒角且未被倒圆的未受弯边缘部分。 每个未被引导的边缘部分位于吸入槽的直接流入区域中，其沿着沿着旋转轴线的方向的视图与吸入通道重叠，并且每个倒角边缘部分位于相应的一个 的外围区域，其不同于直接流入区域。
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公开(公告)号：US20180363607A1
公开(公告)日：2018-12-20
申请号：US16061070
申请日：2016-11-25
Applicant: DENSO CORPORATION
Inventor： Tetsuo HAYAKAWA , Hiromi SAKAI , Daiji FURUHASHI
IPC: F02M37/02 , F02M37/22 , F02M37/10 , B01D35/027
Abstract: A fuel pump unit includes a suction filter and a fuel pump. The fuel pump includes: a rotatable shaft placed along a rotational axis; a rotor portion that rotates in response to rotation of the rotatable shaft; a suction hole portion, through which the fuel is suctioned into an inside of a rotor receiving chamber; and an outer peripheral wall that surrounds the suction hole portion. The suction filter includes: a filter element that filters the fuel and conducts the filtered fuel into an inside space; and a columnar hole portion having an inner peripheral wall, while the outer peripheral wall and the inner peripheral wall are fitted with each other, so that the columnar hole portion communicates between the inside space and the suction hole portion. The columnar hole portion is placed such that the rotational axis extends on an inner side of the inner peripheral wall.
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公开(公告)号：US20180306148A1
公开(公告)日：2018-10-25
申请号：US15768592
申请日：2016-10-28
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
Abstract: The pump housing includes a pair of sliding surfaces clamping the outer and inner gears from both their sides to allow both the gears to slide on the sliding surfaces, a suction port part suctioning fuel from outside into inside of the gear accommodation chamber, and a discharge port part discharging fuel from inside into outside of the gear accommodation chamber. At least one of the suction port part and the discharge port part includes an elongated groove that is depressed from the corresponding sliding surface and extends along a circumferential direction of the pump housing in a region opposed to the pump chambers, opening bores that open on the elongated groove from outside of the gear accommodation chamber, and ribs each of which is arranged between the corresponding adjacent two opening bores. The opening bores and the ribs are arranged alternately along an extending direction of the elongated groove.
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Patent Agency Ranking
公开(公告)号：US20180038326A1
公开(公告)日：2018-02-08
申请号：US15551661
申请日：2016-03-24
Applicant: DENSO CORPORATION
Inventor： Daiji FURUHASHI , Hiromi SAKAI
CPC classification number: F02M37/08 , F04C2/10 , F04C2/102 , F04C14/10 , F04C15/00 , F04C15/0065 , F04C15/0076 , F04C2210/203 , F04C2270/16
Abstract: A fuel pump includes: an outer gear; an inner gear that is meshed with the outer gear and includes a receiving hole; a rotatable shaft; a contact portion that is formed to be contactable with the receiving hole; and a pump housing that rotatably receives the outer gear and the inner gear and includes a first housing component and a second housing component, between which the inner gear is held in the axial direction. At least one of the receiving hole and the contact portion includes a tilt surface, which is tilted relative to the axis direction. When the rotatable shaft is rotated to a drive rotation side, the receiving hole contacts the contact portion through the tilt surface, so that the receiving hole is urged in a circumferential direction and is also urged toward the first housing component in the axial direction.
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公开(公告)号：US20180010607A1
公开(公告)日：2018-01-11
申请号：US15544345
申请日：2016-01-15
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
CPC classification number: F04C15/06 , F02M37/08 , F04C2/102 , F04C15/0049 , F04C2230/10 , F04C2240/30 , F04C2250/10
Abstract: A suction side end part of a suction guide passage and a discharge side end part of a discharge guide passage are opposed to each other with a gap therebetween. At a deviation angle at which contraction of a pump chamber starts, an outer peripheral part of the discharge side end part is formed along an inner tooth, and an inner peripheral part of the discharge side end part is formed along an outer tooth. A working tool that rotates and cuts circularly is moved around on a pump housing in a single continuous line to form an outline of the discharge guide passage, thereby forming the discharge guide passage. The working tool is moved around on the pump housing in a single continuous line to form an outline of the suction guide passage, thereby forming the suction guide passage.
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公开(公告)号：US20180112659A1
公开(公告)日：2018-04-26
申请号：US15569200
申请日：2016-04-19
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
Abstract: A fuel pump includes: an outer gear having a plurality of inner teeth; an inner gear having a plurality of outer teeth and eccentrically meshing with the outer gear; and a pump housing that defines a cylindrical gear housing chamber housing the outer gear and the inner gear to be rotatable. The outer gear and the inner gear rotate, while expanding and contracting a volume of a plurality of pump chambers formed between the outer gear and the inner gear, to sequentially draw fuel into and discharge from the pump chamber. An inner circumference part of the pump housing has a radially-inside corner part opposing a radially-outside corner part of an outer circumference part of the outer gear, and the pump housing has an annular groove formed in an annular shape all around the radially-inside corner part.
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公开(公告)号：US20180087504A1
公开(公告)日：2018-03-29
申请号：US15564860
申请日：2016-08-08
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
CPC classification number: F04C2/084 , F02M37/08 , F04C2/102 , F04C11/008 , F04C13/005 , F04C15/06 , F04C2210/1044 , F04C2230/602 , F04C2240/40 , F05C2253/20
Abstract: A pump housing includes: a slide surface, along which inner and outer gears are slid; a suction guide passage, which is recessed from the slide surface and guides the fuel at a suction side; a discharge passage, which is recessed from the slide surface-and guides the fuel at a discharge side; and a communication groove, which is recessed from the slide surface and is shaped into an arcuate form that extends along a circumcircle of the inner gear. The communication groove is communicated with the suction groove and the discharge passage through two opposite groove end parts, respectively, of the communication groove.
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公开(公告)号：US20170370338A1
公开(公告)日：2017-12-28
申请号：US15542758
申请日：2015-12-21
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Daiji FURUHASHI
CPC classification number: F02M59/12 , F02M37/10 , F04C2/084 , F04C2/086 , F04C2/102 , F04C11/008 , F04C15/0065 , F04C15/008 , F04C15/0088 , F04C15/06 , F04C2210/203 , F04C2240/30 , F04C2240/40 , F04C2240/60
Abstract: An inner gear includes: sliding surface parts that are provided annularly at an outer peripheral part including a plurality of outer teeth on both sides of the inner gear in its axial direction and that slide on a pump housing; recessed parts that are respectively provided radially inward of the sliding surface parts to respectively form fuel chambers, into which fuel flows, between the recessed parts and the pump housing; and a communication hole that communicates between the recessed parts. The inner gear further includes an inclined surface part that is provided at an edge portion of a communicating edge portion on a rotation advance side of the inner gear, to avoid an adjacent part adjacent to an inner peripheral edge portion of each of the sliding surface parts and that is inclined further toward a rear side in a direction to a central part of the communication hole.
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