JPS62138881U

JPS62138881U -

Info

Publication number: JPS62138881U
Application number: JP2680086U
Authority: JP
Priority date: 1986-02-26
Filing date: 1986-02-26
Publication date: 1987-09-01
Also published as: JPH0435592Y2

Description

[Brief explanation of the drawing]

第１図は本実施例に係るベーンポンプの縦断側
面図である。第２図はベーンポンプの要部の横断
面図である。第３図は従来のベーンポンプの縦断
側面図である。図中、１はポンプハウジング、１６は第１ドレ
ン通路、１７は第５ドレン通路、２はカムリング
、２１は第３ドレン通路、３はサイドプレート、
３３は第２ドレン通路、４はサイドプレート、４
３は第４ドレン通路、５はロータ、５１はベーン
、６は回転軸をそれぞれ示す。 FIG. 1 is a longitudinal sectional side view of the vane pump according to this embodiment. FIG. 2 is a cross-sectional view of the main parts of the vane pump. FIG. 3 is a vertical side view of a conventional vane pump. In the figure, 1 is a pump housing, 16 is a first drain passage, 17 is a fifth drain passage, 2 is a cam ring, 21 is a third drain passage, 3 is a side plate,
33 is a second drain passage, 4 is a side plate, 4
3 is a fourth drain passage, 5 is a rotor, 51 is a vane, and 6 is a rotating shaft.

Claims

[Scope of Claim for Utility Model Registration] (1) A pump housing having a bearing chamber, a functional chamber communicating with the bearing chamber, a suction passage, and a discharge passage, and a pump housing housed within the functional chamber and having an inner circumferential surface as a cam surface. a cam ring; a pair of side plates that are arranged on both sides of the cam ring and have a suction port that communicates with the suction passage and a discharge port that communicates with the discharge passage, respectively, formed on surfaces that contact the cam ring; and a pair of side plates that are in sliding contact with the cam surface. a rotor that holds a plurality of vanes radially and is rotatably held in a vane chamber formed by the cam ring and the pair of side plates; and a rotating shaft coupled to the rotor and rotatably held in the bearing chamber. In the vane pump, the pump housing includes: a first drain passage whose both ends are open to the bearing chamber and the functional chamber, which return discharge fluid introduced into the bearing chamber to the bearing chamber side; The cam ring and the pair of side plates each have a first drain passage and a fifth drain passage on each circumferential wall of the cam ring and the pair of side plates. It has a third drain passage, a second drain passage, and a fourth drain passage that communicate with each other, and the discharge fluid sent to the bearing chamber is transferred to the first drain passage, the second drain passage, the third drain passage, and the fourth drain passage. A vane pump characterized in that it is configured to return to a suction passage via a drain passage and a fifth drain passage. (2) The vane pump according to claim 1, wherein at least one of the cam ring and the pair of side plates is formed of a sintered body obtained by sintering a green compact having holes that serve as drain passages.