Vane pump

Abstract

A vane pump includes a pump cartridge that is accommodated in an accommodating space defined by the concave portion and the pump cover. The pump cartridge includes a first side plate that is provided between the bottom portion of the concave portion in the pump body and a cam ring; first pins that are provided so as to extend from the cam ring to the first side plate; and second pins that are provided so as to extend from the first side plate to the pump body.

1 . A vane pump comprising:
 a pump body having a concave portion;   a pump cover attached to the pump body, the pump cover being configured to seal the concave portion; and   a pump cartridge accommodated in an accommodating space defined by the concave portion and the pump cover, wherein   the pump cartridge comprises:   a rotor linked to a driving shaft;   a plurality of slits formed in the rotor in a radiating pattern to open in an outer circumference of the rotor;   a plurality of vanes respectively inserted into the plurality of slits in a slidable manner;   a cam ring having an inner circumferential surface on which tip-ends of the vanes slide by rotation of the rotor;   a side plate provided between a bottom portion of the concave portion in the pump body and the cam ring;   a first pin provided so as to extend from the cam ring to the side plate; and   a second pin provided so as to extend from the side plate to the pump body.   
     
     
         2 . The vane pump according to  claim 1 , wherein
 the pump cartridge comprises two or more second pins.   
     
     
         3 . The vane pump according to  claim 1 , wherein
 the side plate has a discharge port configured to guide working fluid that has been discharged from pump chambers in the pump cartridge, the pump chambers being defined by the rotor, the cam ring, and the adjacent vanes,   the pump body has:
 an arc-shaped high-pressure chamber into which the working fluid that has been discharged from the pump chambers is guided through the discharge port; and 
 a discharge passage configured to communicate with the high-pressure chamber through a high-pressure port opening to the high-pressure chamber, and 
   the second pin is provided at a position where the second pin does not penetrate through a part of the high-pressure chamber extending in a circumferential direction between the discharge port and the high-pressure port.   
     
     
         4 . The vane pump according to  claim 3 , wherein
 the pump body is formed with a raised portion, the raised portion being configured to separate both ends of the high-pressure chamber, and   the second pin is provided so as to extend from the side plate to the raised portion.