公开(公告)号：US10060430B2

公开(公告)日：2018-08-28

申请号：US15104188

申请日：2014-12-10

Applicant: NTN CORPORATION

Inventor： Takuya Ishii ,  Hajime Asada

IPC: F01C1/10 ,  F03C2/00 ,  F03C4/00 ,  F04C2/00 ,  F04C2/10 ,  F16C17/10 ,  F16C33/20 ,  F04C11/00 ,  F04C15/00 ,  F04C18/02 ,  F04C29/02 ,  F16C33/10

Abstract: An internal gear pump integrally provided with a plain bearing requiring fewer machining steps, allowing inexpensive manufacture, and offering a highly stable seizing property. The internal gear pump has a trochoid (4), in which an inner rotor (3) having a plurality of outer teeth is eccentrically and rotatably accommodated in an outer rotor (2) having a plurality of inner teeth, the outer teeth meshing with the inner teeth, and in which a suction-side chamber for suctioning liquid and a discharge-side chamber for discharging the liquid that has been suctioned into the suction-side chamber are formed between the inner teeth and outer teeth; a drive shaft (9) fixed to the inner rotor (3); a casing (5) in which is formed a recess (5a) for accommodating the trochoid (4); and a cover (6) for closing off the recess (5a) of the casing (5).

公开(公告)号：US09810215B2

公开(公告)日：2017-11-07

申请号：US14420351

申请日：2013-07-26

Applicant: NTN CORPORATION

Inventor： Takuya Ishii ,  Masato Shimoda ,  Hajime Asada ,  Kei Hattori

IPC: F04C2/00 ,  F04C2/08 ,  F04C15/06 ,  F04C2/14 ,  F01C21/10 ,  F04C2/10 ,  F04C11/00

CPC classification number: F04C2/14 ,  F01C21/10 ,  F04C2/086 ,  F04C2/102 ,  F04C11/005 ,  F04C15/06 ,  F04C2210/14 ,  F04C2230/21 ,  F04C2230/22 ,  F04C2230/231 ,  F04C2240/51 ,  F05C2253/20

Abstract: Provided is an internal gear pump requiring fewer machining steps, allowing inexpensive manufacture, and offering high safety from the standpoint of function. The internal gear pump 1 comprises: a trochoid 4 in which an inner rotor 3 having a plurality of outer teeth is eccentrically and rotatably accommodated in an outer rotor 2 having a plurality of inner teeth, the outer teeth meshing with the inner teeth, and in which a suction-side chamber for suctioning liquid and a discharge-side chamber for discharging liquid that has been suctioned into the suction-side chamber are formed in between the inner teeth and outer teeth; a casing 5 in which is formed a recess 5a for accommodating the trochoid 4; and a cover 6 for closing off the recess 5a of the casing 5. At least some of the casing 5 is a body injection-molded from a resin composition. The invention also comprises a groove 5d in a portion of the recess 5a of the casing 5 in which the outer periphery is sealed, with a sealing ring 13 installed therein, and bushings 7 made from sintered metal that are provided integrally during injection molding in bolt fixing hole portions.

公开(公告)号：US11007572B2

公开(公告)日：2021-05-18

申请号：US15753205

申请日：2016-07-19

Applicant: NTN CORPORATION

Inventor： Yoshinori Ito ,  Hajime Asada ,  Hiroshi Akai ,  Kei Hattori

IPC: B22F3/24 ,  C22C33/02 ,  C21D1/06 ,  C23C8/22 ,  C22C38/22 ,  C22C38/00 ,  C21D1/46 ,  C22C38/50 ,  C23C8/02 ,  C23C8/56 ,  C23C28/04 ,  C23C8/32 ,  C23C8/80 ,  C23C8/26 ,  C23C8/34 ,  B22F5/00 ,  C23C8/50 ,  B22F5/10

Abstract: A sliding member (1) includes an iron and steel-based sintered compact containing chromium, molybdenum, and carbon and having a content of chromium, of 5 mass % or less. The sliding member (1) includes: a compound layer (11) which has a sliding surface (1a) and is formed mainly of an iron and steel nitride; and a diffusion layer (12) which is adjacent to the compound layer (11) and has an iron and steel structure into which nitrogen and carbon diffuse. The concentrations of carbon and nitrogen in the diffusion layer (12) are gradually reduced with increasing depth from the sliding surface (1a).

公开(公告)号：US20150204325A1

公开(公告)日：2015-07-23

申请号：US14420351

申请日：2013-07-26

Applicant: NTN CORPORATION

Inventor： Takuya Ishii ,  Masato Shimoda ,  Hajime Asada ,  Kei Hattori

IPC: F04C2/14 ,  F04C15/06

CPC classification number: F04C2/14 ,  F01C21/10 ,  F04C2/086 ,  F04C2/102 ,  F04C11/005 ,  F04C15/06 ,  F04C2210/14 ,  F04C2230/21 ,  F04C2230/22 ,  F04C2230/231 ,  F04C2240/51 ,  F05C2253/20

Abstract: Provided is an internal gear pump requiring fewer machining steps, allowing inexpensive manufacture, and offering high safety from the standpoint of function. The internal gear pump 1 comprises: a trochoid 4 in which an inner rotor 3 having a plurality of outer teeth is eccentrically and rotatably accommodated in an outer rotor 2 having a plurality of inner teeth, the outer teeth meshing with the inner teeth, and in which a suction-side chamber for suctioning liquid and a discharge-side chamber for discharging liquid that has been suctioned into the suction-side chamber are formed in between the inner teeth and outer teeth; a casing 5 in which is formed a recess 5a for accommodating the trochoid 4; and a cover 6 for closing off the recess 5a of the casing 5. At least some of the casing 5 is a body injection-molded from a resin composition. The invention also comprises a groove 5d in a portion of the recess 5a of the casing 5 in which the outer periphery is sealed, with a sealing ring 13 installed therein, and bushings 7 made from sintered metal that are provided integrally during injection molding in bolt fixing hole portions.

Abstract translation: 提供了一种需要更少加工步骤的内齿轮泵，允许廉价的制造，并且从功能的角度提供高安全性。 内齿轮泵1包括：次摆线4，其中具有多个外齿的内转子3偏心并可旋转地容纳在具有多个内齿的外转子2中，外齿与内齿啮合，并且在 在内齿和外齿之间形成有用于吸入液体的吸入侧室和用于排出被吸入吸入侧室的液体的排出侧室; 壳体5，其形成有用于容纳次摆线4的凹部5a; 以及用于封闭壳体5的凹部5a的盖6.壳体5中的至少一个是从树脂组合物注射成型的主体。 本发明还包括在壳体5的凹部5a的一部分中的凹槽5d，其中外周被密封，其中安装有密封环13，以及由在金属螺栓中注射成型期间一体地设置的由烧结金属制成的衬套7 固定孔部分。