Cartridge vane pump and pump device including same

Patent metadata

Field	Value
Publication number	US-2021003129-A1
Application number	US-201816612243-A
Country	US
Kind code	A1
Filing date	Apr 24, 2018
Priority date	May 11, 2017
Publication date	Jan 7, 2021
Grant date	—

Abstract

A cartridge vane pump includes: a side plate brought into contact with first end surfaces of the rotor and the cam ring; a cover brought into contact with second end surfaces of the rotor and the cam ring, the cover attached to the body; and an O-ring provided in an outer circumference of the side plate, the O-ring being configured to seal a gap between the outer circumference of the side plate and an inner circumference of the body. The side plate has: a first flange portion configured to restrict movement of the O-ring towards the rotor side; a second flange portion configured to restrict movement of the O-ring towards an opposite side from the rotor. The first flange portion is formed to be able to compress the O-ring with the body in an axial direction of the driving shaft.

First claim

1 . A cartridge vane pump configured to be accommodated in a body in an attachable and detachable manner, the cartridge vane pump comprising:
a rotor linked to a driving shaft, the rotor being configured to be rotationally driven; a plurality of vanes provided in the rotor so as to be able to 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 first end surfaces of the rotor and the cam ring; a cover member brought into contact with second end surfaces of the rotor and the cam ring, the cover member being configured to be attached to the body; and a sealing member provided in an outer circumference of the side member, the sealing member being configured to seal a gap between the outer circumference of the side member and an inner circumference of the body, wherein the side member has:
a first restricting portion configured to restrict movement of the sealing member towards the rotor side;
a second restricting portion configured to restrict movement of the sealing member towards an opposite side from the rotor; and
an accommodating space defined by the first restricting portion and the second restricting portion, the sealing member being configured to be accommodated in the accommodating space, and wherein
the first restricting portion is formed to have an outer diameter larger than an outer diameter of the second restricting portion so as to be able to compress the sealing member with the body in an axial direction of the driving shaft.

2 . The cartridge vane pump according to claim 1 , wherein
the second restricting portion has a guide surface configured to guide insertion of the sealing member into the accommodating space, the guide surface being formed such that the outer diameter is gradually increased towards the accommodating space.

3 . A pump device comprising:
the cartridge vane pump according to claim 1 ; and the body having an accommodating concave portion configured to accommodate the cartridge vane pump; wherein the accommodating concave portion has:
a first accommodating portion configured to accommodate the first restricting portion;
a second accommodating portion formed to have an inner diameter smaller than an inner diameter of the first accommodating portion, the second accommodating portion being configured to accommodate the second restricting portion; and
a tapered portion formed between the first accommodating portion and the second accommodating portion so as to have a tapered surface inclined with respect to the driving shaft, the sealing member being configured to be compressed in an axial direction between the tapered portion and the first restricting portion.

Assignees

• Kyb Corp

Inventors

• Kondou Hirotoshi
• Sugihara Masamichi

Classifications

• F16J15/10

  with non-metallic packing · CPC title

• F16J15/062

  characterised by the geometry of the seat · CPC title

• F16J15/021

  with elastic packing (F16J15/08 takes precedence) · CPC title

• F04C15/0034

  for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine · CPC title

• F04C2/344

  with vanes reciprocating with respect to the inner member · CPC title