公开(公告)号：US20020085923A1

公开(公告)日：2002-07-04

申请号：US10006139

申请日：2001-12-10

Applicant: Unisia JKC Steering Systems Co, Ltd.

Inventor： Hideo Konishi

IPC: F04B049/00

CPC classification number: F04C14/226

Abstract: A cam ring 10 is slidably supported within a pump body 2, and a rotor 20 is rotatably disposed inside the cam ring. The cam ring is eccentric to a rotation shaft 22 of the rotor. The rotor carries a plurality of vanes 18 that can be advanced or retreated, in which a pump chamber 24 is formed in a space between the cam ring and the rotor. The cam ring is formed with the first and second fluid pressure chambers 14 and 16 on both sides thereof, and biased in a direction where the displacement of the pump chamber is at maximum by a spring 26. A control valve 28 is provided in which a differential pressure across a metering orifice is applied on both ends of a spool 32 and a spring 36 is disposed on the side of an end face where a downstream fluid pressure is applied. The fluid pressures of the fluid pressure chambers 14 and 16 are controlled by means of the control valve, whereby the cam ring is swung. A piston 58 that is moved in accordance with an increase in working pressure of a power steering apparatus is provided. This piston 58 exerts an axial thrust to an end face of the spool on the spring side.

Abstract translation: 凸轮环10可滑动地支撑在泵体2内，转子20可旋转地设置在凸轮环的内部。 凸轮环对于转子的旋转轴22是偏心的。 转子承载可以前进或后退的多个叶片18，其中泵室24形成在凸轮环和转子之间的空间中。 凸轮环在其两侧形成有第一和第二流体压力室14和16，并且通过弹簧26在泵室的位移最大化的方向上被偏压。设置控制阀28，其中 跨越计量孔的压差施加在阀芯32的两端，弹簧36设置在施加有下游流体压力的端面的一侧。 流体压力室14和16的流体压力通过控制阀控制，由此凸轮环摆动。 提供了根据动力转向装置的工作压力的增加而移动的活塞58。 该活塞58在弹簧侧向阀芯的端面施加轴向推力。

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。