Vane pump

Abstract

A vane pump includes a pump rotor having a through hole to which a driving shaft is coupled, a pump housing configured to accommodate the pump rotor and the cam ring, and a first side plate provided between the pump rotor and a bottom surface of the pump housing. The first side plate or the pump housing is formed with a projection, the projection is inserted into the through hole of the pump rotor.

1 . A vane pump comprising:
 a rotor having a through hole to which a driving shaft is coupled;   a plurality of vanes provided so as to be freely reciprocatable in a radial direction with respect to the rotor;   a cam ring configured to accommodate the rotor, the cam ring being configured such that tip-ends of the vanes slide on an inner circumferential surface of the cam ring as the rotor is rotated;   a housing configured to accommodate the rotor and the cam ring; and   a side plate provided between the rotor and a bottom surface of the housing, wherein   the side plate or the housing is formed with a projection, the projection being inserted into the through hole of the rotor, and   the projection is press-fitted into a groove formed in a side surface of the side plate.   
     
     
         2 . The vane pump according to  claim 1 , wherein
 the projection is configured such that the rotor is aligned in the cam ring when the driving shaft is inserted into the through hole of the rotor.   
     
     
         3 . The vane pump according to  claim 1 , wherein
 the projection is formed to have a cylinder shape concentric with the through hole of the rotor, and   a gap is formed between an outer circumferential surface of the projection and an inner circumferential surface of the through hole, and a gap is formed between an end surface of the projection and an end surface of the driving shaft.   
     
     
         4 . (canceled) 
     
     
         5 . (canceled)