公开(公告)号：US4842500A

公开(公告)日：1989-06-27

申请号：US230701

申请日：1988-08-09

申请人： Tohru Fujie ,  Yoshio Hirose

发明人： Tohru Fujie ,  Yoshio Hirose

IPC分类号： F04C2/344 ,  F01C21/10 ,  F04C15/00

CPC分类号： F01C21/10 ,  F04C15/00 ,  F04C2230/603 ,  Y10T29/49245

摘要： A vane pump comprising a housing having front and rear surfaces and formed with a cam ring housing portion which is open to the front surface, the housing being further formed at its inner peripheral wall with recess portions and an axial bore extending from the rear surface, said axial bore being open to a center of the ring housing portion; a drive shaft freely rotatably supported in the axial bore of the housing; a rotor inserted on the drive shaft and engaged with the drive shaft, the rotor having a plurality of slits and a plurality of vanes each projectable from and retractable in the corresponding slit; a cam ring having at its inner peripheral wall a cam surface which is arranged to enclose the rotor therein and form pump chambers in cooperation with the vanes, the cam ring being formed at its outer peripheral wall with recess portions of substantially semicircular configuration in cross section; a front end plate by which the cam ring is closed at its one end; a rear end plate formed with a bearing portion through which one end portion of the drive shaft is freely rotatably supported, the rear end plate also formed with at least a pair of openings, each of the openings being spaced at a predetermined distance from a center axis of the bearing portion of the rear end plate; and knock pins fixedly inserted in the openings of the rear end plate, disposed to engage the cam ring in the semicircular recess portions of the cam ring, and disposed with clearance in bores defined by the recess portions of the housing so that the cam ring is held and positioned only with respect to the rear end plate.

摘要翻译： 一种叶片泵，包括具有前表面和后表面的壳体，并且形成有朝向前表面开口的凸轮环容纳部分，所述壳体在其内周壁处进一步形成有凹部和从后表面延伸的轴向孔， 所述轴向孔向所述环容纳部分的中心开口; 驱动轴，其自由旋转地支撑在壳体的轴向孔中; 转子，其插入在驱动轴上并与驱动轴接合，转子具有多个狭缝和多个叶片，每个叶片能够在相应的狭缝中伸出并缩回; 凸轮环在其内周壁处具有凸轮表面，所述凸轮表面布置成将转子包围在其中并与叶片协作地形成泵室，所述凸轮环在其外周壁处形成有大致半圆形构造的凹部，横截面 ; 前端板，凸轮环在其一端封闭; 后端板，其形成有轴承部分，驱动轴的一个端部通过该轴承部分自由旋转地支撑，后端板还形成有至少一对开口，每个开口与中心隔开预定的距离 后端板的轴承部的轴线; 以及固定地插入在后端板的开口中的敲针，其设置成将凸轮环接合在凸轮环的半圆形凹部中，并且间隙设置在由壳体的凹部限定的孔中，使得凸轮环为 只能相对于后端板固定和定位。