Vane pump

Abstract

A vane pump is provided with: a pump housing having an accommodating concave portion; and a pump cartridge accommodated in the accommodating concave portion, wherein the pump cartridge has: a rotor; a plurality of vanes received in a plurality of slits formed in the rotor; a cam ring formed with a cam face on an inner circumference of the cam ring; and a first side plate provided at the opposite side from a bottom surface of the accommodating concave portion such that the cam ring is located therebetween, the first side plate has a first projected portion projected radially outward, and the pump cartridge is anchored to the pump housing via the first projected portion.

1 . A vane pump configured to discharge working fluid by being rotationally driven by a driving source, comprising:
 a pump housing having an accommodating concave portion; and   a pump cartridge accommodated in the accommodating concave portion, wherein   the pump cartridge has:
 a rotor to which a rotational driving force from the driving source is transmitted; 
 a plurality of vanes freely slidably received in a plurality of slits, the slits being formed in the rotor in a radiating pattern; 
 a cam ring formed with a cam face on an inner circumference of the cam ring, the cam face being configured such that tip ends of the plurality of vanes slide on the cam face as the rotor is rotated; and 
 a first side plate provided on an opposite side from a bottom surface of the accommodating concave portion such that the cam ring is located therebetween, 
   the first side plate has a first projected portion projected radially outward, and   the pump cartridge is anchored to the pump housing via the first projected portion.   
     
     
         2 . The vane pump according to  claim 1 , further comprising
 an annular member fitted into an annular groove, the annular groove being formed in an inner circumferential surface of the accommodating concave portion, wherein   the annular member comes into contact with the first projected portion at an opposite side from the bottom surface of the accommodating concave portion.   
     
     
         3 . The vane pump according to  claim 2 , wherein
 the pump cartridge further has: a second side plate provided on an opposite side from the first side plate such that the cam ring is located therebetween; and a linkage pin configured to link the cam ring, the first side plate, and the second side plate,   the second side plate has a second projected portion projected radially outward, and   a first engagement groove is provided in the inner circumferential surface of the accommodating concave portion so as to extend along an axial direction, the first engagement groove being configured to engage with the second projected portion.   
     
     
         4 . The vane pump according to  claim 1 , wherein
 a second engagement groove is provided in the inner circumferential surface of the accommodating concave portion, the second engagement groove being configured to engage with the first projected portion,   the second engagement groove has an axial groove and a circumferential direction groove, the axial groove being provided so as to extend along an axial direction, and the circumferential direction groove being configured so as to be connected to the axial groove and to extend in a circumferential direction, and   in a state in which at least a part of the first projected portion is engaged with the circumferential direction groove, the pump cartridge is anchored to the pump housing.