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11. 发明专利

JP2006152928A Inscribed type gear pump 审中-公开
标题翻译：插入式齿轮泵
公开(公告)号：JP2006152928A
公开(公告)日：2006-06-15
申请号：JP2004345071
申请日：2004-11-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KURATA MASAKAZU , KUSATSUMI TAKUMI , OTAKI MIZUO
IPC分类号： F04C2/10
CPC分类号： F04C2/102
摘要： PROBLEM TO BE SOLVED: To prevent the volume efficiency of a pump by forming two or more of the contact portions of inner and outer teeth near a closed part where the displacement of the pump is maximized.
SOLUTION: In this inscribed type gear pump, a suction port 7 and a discharge port 8 formed in a same circular arc shape are formed at symmetrical positions with respect to an axis X connecting the closed part 20 where the displacement of a pump chamber 6 formed between the inner and outer teeth 3a and 4a of outer and inner rotors 3 and 4 is maximized to a meshed part 21 where the displacement is minimized. The sealability of the pump chambers can be increased by forming three line-contact portions 19a to 19c of the inner and outer teeth near the closed part and in an area between the end part 7a of the suction port and the start end part 8a of the discharge port.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过在泵的位移最大化的闭合部分附近形成内外齿的接触部分中的两个或更多个来防止泵的体积效率。解决方案：在这种内接式齿轮泵中，形成为相同圆弧形状的吸入口7和排出口8相对于连接闭合部分20的轴线X在对称位置处形成，其中泵的位移形成在外转子3和内转子4的内齿3a和外齿4a之间的腔室6最大化为啮合部分21，其中位移最小化。可以通过在封闭部分附近形成内外齿的三个线接触部分19a至19c以及吸入口的端部7a和吸入口的端部部分8a之间的区域来增加泵室的密封性。排气口。版权所有（C）2006，JPO＆NCIPI

12. 发明专利

DE102005037035A1 未知
公开(公告)号：DE102005037035A1
公开(公告)日：2006-02-23
申请号：DE102005037035
申请日：2005-08-05
申请人： HITACHI LTD
发明人： KURATA MASAKAZU , HISAZUMI TAKUMI , NAKAKUKI YASUHITO , NAKADA MITSUAKI , OTAKI MIZUO
IPC分类号： F04C2/10
摘要： A trochoid pump for supplying hydraulic fluid to a power cylinder in a power steering system. The trochoid pump includes a housing formed therein with an annular operating chamber. Outer rotor having internal teeth and inner rotor having external teeth are rotatably accommodated in the operating chamber in such a manner that the internal and external teeth are engageable with each other. A driving shaft is provided for rotationally driving the inner rotor. A low pressure passage is opened to a clearance between an outer peripheral surface of the outer rotor and an inner peripheral surface of the operating chamber within a discharge region at side of an engaging section at which the volume of the pump chamber is the minimum so as to release a high pressure applied to the outer peripheral surface of the outer rotor, to a low pressure side.

13. 发明专利

DE102005056277A1 Geared pump with inner teeth, to supply oil for antilock brake and servo steering systems, has an outer rotor with inner teeth and an inner rotor at the drive shaft with outer teeth in a housing 未知
公开(公告)号：DE102005056277A1
公开(公告)日：2006-06-01
申请号：DE102005056277
申请日：2005-11-25
申请人： HITACHI LTD
发明人： KURATA MASAKAZU , HISAZUMI TAKUMI , OTAKI MIZUO
IPC分类号： F04C2/10 , F04C15/00
摘要： The geared pump, with inner teeth, has a housing and an outer rotor (3) with inner teeth (3a) rotating at an inner side of the housing. An inner rotor (4), with outer teeth (4a), rotates at the inner side of the outer rotor to rotate a drive shaft (5). Volume chambers (6) are between the inner and outer teeth and a suction connection (7) is at the chambers and open to give an increasing volume and an outlet connection (8) at the chambers is open to give a decreasing volume. The teeth have contact zones (19a-19c) between them, between the end (7a) of the suction connection and the start (8a) of the outlet connection at a chamber with a maximum volume at one side of a recess (20), in a whole number more than 2.

14. 发明专利

DE102005048018A1 未知
公开(公告)号：DE102005048018A1
公开(公告)日：2006-04-13
申请号：DE102005048018
申请日：2005-10-06
申请人： HITACHI LTD
发明人： KURATA MASAKAZU , OTAKI MIZUO
IPC分类号： F04C14/04 , F04C2/10

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