JPH046788U

JPH046788U -

Info

Publication number: JPH046788U
Application number: JP4695590U
Authority: JP
Priority date: 1990-05-01
Filing date: 1990-05-01
Publication date: 1992-01-22

Description

[Brief explanation of the drawing]

第１図は本考案にかかる可変容量型ベーンポン
プの一実施例をカバー側ハウジングを除いて示す
正面図、第２図はカバー側ハウジングを付けた状
態の第１図の−線断面図、第３図は第１図の
要部拡大図、第４図はシール部材を示す斜視図で
ある。１……ポンプハウジング、１ｃ……ポンプハウ
ジングの内腔、２……カムリング、３……ロータ
、４……ベーン、６……ポンプ室、１１……流体
吸入路、１２……流体吐出路、１５……ポンプハ
ウジング内周面、２１……カムリングの内周面、
２２……カムリング外周面、２４ａ，２４ｂ……
スプリング受座、２２ｄ，２２ｅ……耳部の端面
（ストツパ部）、２５……カムスプリング、３２
……ロータ外周面、Ｏ_３……カムリングの内周面
の中心、α……ロータの回転軸線、β……カムリ
ングの揺動中心とカムリングの内周面の中心とを
結ぶ直線。 Fig. 1 is a front view showing an embodiment of the variable displacement vane pump according to the present invention with the cover side housing removed; Fig. 2 is a sectional view taken along the line - - of Fig. 1 with the cover side housing attached; The figure is an enlarged view of the main part of FIG. 1, and FIG. 4 is a perspective view showing the sealing member. DESCRIPTION OF SYMBOLS 1... pump housing, 1c... lumen of pump housing, 2... cam ring, 3... rotor, 4... vane, 6... pump chamber, 11... fluid suction path, 12... fluid discharge path, 15... Inner circumferential surface of pump housing, 21... Inner circumferential surface of cam ring,
22... Cam ring outer peripheral surface, 24a, 24b...
Spring seat, 22d, 22e... end face of ear (stopper part), 25... cam spring, 32
... Rotor outer circumferential surface, O ₃ ... Center of the inner circumferential surface of the cam ring, α... Rotation axis of the rotor, β... Straight line connecting the center of swing of the cam ring and the center of the inner circumferential surface of the cam ring.

Claims

[Scope of utility model registration request]

A pump housing having a fluid suction passage and a fluid discharge passage, a cam ring provided in the inner cavity of the pump housing, a rotor provided in the cam ring and driven to rotate, and a rotor provided on the outer periphery of the rotor in a radial direction. a plurality of vanes that are movable back and forth and whose radially outer ends slide into contact with the inner peripheral surface of the cam ring, and the cam ring has a center of its inner peripheral surface that can be eccentric with respect to the rotational axis of the rotor. The pump housing is swingably supported by the pump housing, and is biased in the direction of increasing eccentricity by the spring force of a cam spring, and as the rotor rotates, the inner circumferential surface of the cam ring and the rotor As the volume of the pump chamber formed between the pump chamber and the outer peripheral surface of the pump chamber increases or decreases, fluid is sucked into the pump chamber through the fluid suction path and discharged from the pump chamber through the fluid discharge path. In the variable displacement vane pump, the cam ring includes a spring seat that receives a spring force of the cam spring. and a stopper portion that contacts the inner circumferential surface of the pump housing in the maximum eccentric state are symmetrical with respect to a straight line connecting the center of swing of the cam ring and the center of the inner circumferential surface of the cam ring, and symmetrically on the front and back. A variable displacement vane pump characterized by: