Title:
ベーンポンプ
Document Type and Number:
Japanese Patent JP6773991
Kind Code:
B2
Abstract:
Provided is a vane pump capable of ejecting two types of pressure oil of high pressure and low pressure and performing a quick start. The vane pump is provided with: a pump body (2) including a suction inlet (30); a cam ring (3); a rotor (4); a plurality of vanes (6); a first side plate (7) disposed on an oil ejection side which is on one end surface side of the cam ring (3); a second side plate (8) disposed on an oil suction side which is on an another end surface side of the cam ring (3); and a pump cover (10) which includes oil ejection openings (40, 41) at two locations and which is joined to the pump body (2). A pair of back pressure grooves (70, 71, 80, 81) are formed on the rotor (4) side of the first and second side plates (7, 8). The back pressure groove (70) is provided with a first back pressure groove (70A), a second back pressure groove (70B) having a shorter groove length, and a third back pressure groove (70C) connecting the two back pressure grooves (70A, 70B) and having the smallest groove width.
Inventors:
Shimoguchi Tamotsu
Tomio Ohgo
Tomio Ohgo
Application Number:
JP2019513640A
Publication Date:
October 21, 2020
Filing Date:
April 17, 2018
Export Citation:
Assignee:
Fujikoshi Co., Ltd.
International Classes:
F04C2/344
Domestic Patent References:
| JP2001027186A | ||||
| JP7317676A |
Attorney, Agent or Firm:
Asamura patent office