Cartridge vane pump and pump device

Abstract

A cartridge vane pump includes: a linkage member being configured to link the side member and the cover member, the linkage member has: a first support portion configured to support the side member; a second support portion configured to support the cover member; and an extended portion formed so as to extend between the first support portion and the second support portion, the extended portion extending in an axial direction of the rotor, grooves are respectively formed in outer circumferential surfaces of the side member and the cover member so as to extend in a circumferential direction, and the first support portion and the second support portion are respectively received in the grooves formed in the side member and the cover member.

1 . A cartridge vane pump attached to a body of a fluid pressure device, the cartridge vane pump comprising:
 a rotor configured to be driven rotationally;   a plurality of vanes provided in the rotor so as to be able to freely reciprocate in a radial direction of the rotor;   a cam ring having an inner circumference cam face with which the plurality of vanes are brought into sliding contact;   a side member brought into contact with a first end surface of the rotor and a first end surface of the cam ring;   a cover member brought into contact with a second end surface of the rotor and a second end surface of the cam ring, the cover member being attached to the body; and   a linkage member provided so as to extend between the side member and the cover member, the linkage member being configured to link the side member and the cover member, wherein   the linkage member has:
 a first support portion configured to support the side member; 
 a second support portion configured to support the cover member; and 
 an extended portion formed so as to extend between the first support portion and the second support portion, the extended portion extending in an axial direction of the rotor, 
   grooves are respectively formed in outer circumferential surfaces of the side member and the cover member so as to extend in a circumferential direction, and   the first support portion and the second support portion are respectively received in the grooves formed in the side member and the cover member.   
     
     
         2 . The cartridge vane pump according to  claim 1 , wherein
 a straight groove is formed in the outer circumferential surfaces of the side member, the cam ring, and the cover member, the straight groove being configured such that the respective grooves formed in the side member and the cover member are communicated with each other, and   the extended portion is received in the straight groove.   
     
     
         3 . The cartridge vane pump according to  claim 1 , wherein
 the extended portion forms a pair thereof extending in straight lines,   one of the first support portion and the second support portion forms a pair thereof, the pair respectively extending in mutually opposite directions from first end portions of the pair of extended portions, and   other of the first support portion and the second support portion is formed so as to extend between second end portions of the pair of extended portions.   
     
     
         4 . A pump device comprising:
 the cartridge vane pump according to  claim 1 ;   the body configured to accommodate the cartridge vane pump; and   a low pressure chamber formed between the body and an outer circumference of the cartridge vane pump, the low pressure chamber being configured to function as a suction passage communicating with a suction port of the cartridge vane pump; wherein   the linkage member is accommodated in the low pressure chamber.