JPH02124287U

JPH02124287U -

Info

Publication number: JPH02124287U
Application number: JP3377389U
Authority: JP
Priority date: 1989-03-23
Filing date: 1989-03-23
Publication date: 1990-10-12

Description

[Brief explanation of drawings]

第１〜５図の本考案に係る可変容量ベーンポン
プの一実施例を示す図であり、第１図はその全体
構成図、第２図はそのカムリングおよびロータの
偏心量とフイードバック圧力との関係を示す特性
図、第３図はそのスプリングの反力と偏心量の関
係を示す特性図、第４図はスプリングの他の態様
を示す要部構成図、第５図は第４図のスプリング
を用いたときの偏心量とフイードバック圧力の関
係を示す特性図、第６図は従来の可変容量ベーン
ポンプを示すその全体構成図である２１……カムリング、２２……ロータ、２４…
…作動室、２５……ベーン、２６……支持部材、
２８ａ、２８ｂ……第１、第２スプリング（スプ
リング）、３６……油圧ピストン。 1 to 5 are diagrams showing one embodiment of the variable displacement vane pump according to the present invention, in which FIG. 1 is an overall configuration diagram thereof, and FIG. 2 is a diagram showing the relationship between eccentricity of the cam ring and rotor and feedback pressure. Figure 3 is a characteristic diagram showing the relationship between the reaction force and eccentricity of the spring, Figure 4 is a main part configuration diagram showing other aspects of the spring, and Figure 5 is a characteristic diagram showing the relationship between the spring's reaction force and eccentricity. Figure 6 is a diagram showing the overall configuration of a conventional variable displacement vane pump. 21...cam ring, 22...rotor, 24...
... working chamber, 25 ... vane, 26 ... support member,
28a, 28b...first and second springs (springs), 36...hydraulic piston.

Claims

[Scope of utility model registration request]

A cam ring, a rotor that is eccentrically housed in the cam ring to define a working chamber, and in which a plurality of vanes that are in sliding contact with the inner peripheral surface of the cam ring are fitted so as to be able to protrude and retract in the radial direction, and the amount of eccentricity of the cam ring and rotor. a support member that swingably supports the cam ring in a direction perpendicular to its axis so that the cam ring changes; a spring that urges the cam ring in one direction in the swing direction; and a hydraulic piston that urges the cam ring in the other direction in the swing direction. In the variable capacity vane pump, the spring has a non-linear characteristic, and the spring has a non-linear characteristic, and the spring has a non-linear characteristic, and the spring has a non-linear characteristic, and A variable capacity vane pump characterized by a spring constant that changes depending on the amount of eccentricity.