公开(公告)号：US20030059312A1

公开(公告)日：2003-03-27

申请号：US10253423

申请日：2002-09-25

Applicant: UNISIA JKC STEERING SYSTEMS CO., LTD

Inventor： Hideo Konishi ,  Kazuyoshi Uchino ,  Haruo Okamoto

IPC: F04B049/00

CPC classification number: F04C14/226 ,  F01C21/0863 ,  F04C2/3442

Abstract: A variable displacement pump has a cam ring, a rotor, a plurality of vanes, a pressure plate and a rear body. The cam ring is accommodated within a pump body. The rotor rotates within the cam ring. The plurality of vanes are inserted retractably into slits formed at regular intervals circumferentially in the rotor. The pressure plate and the rear body carry the cam ring and the rotor. A circular groove communicating to a back pressure inlet bore on a bottom portion of the slits is formed in a suction area on a face of the rear body on a side of the rotor. The groove is communicated via a communication passage to a passage between a power steering gear and a tank T to introduce a working oil after used in the power steering gear.

Abstract translation: 可变排量泵具有凸轮环，转子，多个叶片，压板和后体。 凸轮环容纳在泵体内。 转子在凸轮环内旋转。 多个叶片可缩回地插入在转子中周向形成有规则间隔的狭缝中。 压板和后体承载凸轮环和转子。 在转子的一侧的后体的表面的吸引区域形成有与槽的底部的背压入口孔连通的圆形槽。 该槽通过连通通道连接到动力转向装置和油箱T之间的通道，以在动力转向装置中使用后引入工作油。