JPH03122285U

JPH03122285U -

Info

Publication number: JPH03122285U
Application number: JP3091190U
Authority: JP
Priority date: 1990-03-26
Filing date: 1990-03-26
Publication date: 1991-12-13

Description

[Brief explanation of the drawing]

第１図ないし第５図は本考案の一実施例を示し
、第１図はシール部の拡大断面図で、第５図の
−線に沿う断面図、第２図はシール部の斜視図
、第３図はその側面図、第４図はその平面図、第
５図はポンプ部の断面図、第６図および第７図は
従来例を示し、第６図はポンプ部の断面図、第７
図はシール部の拡大断面図で、第６図の−線
に沿う断面図である。１……ロータ、２……ベーン、３……カムリン
グ、３ａ……空間、３１……軸部材（支軸）、４
……ポンプハウジング、４１……吸入ポート、４
２……吐出ポート、５……シール部、５１……摺
動体、５１１，５１２……壁部、５１３……凹状
部、５２……弾性体、Ｐ……ポンプ室。 1 to 5 show an embodiment of the present invention, in which FIG. 1 is an enlarged sectional view of the seal portion, a sectional view taken along the line - in FIG. 5, and FIG. 2 is a perspective view of the seal portion; Fig. 3 is a side view thereof, Fig. 4 is a plan view thereof, Fig. 5 is a sectional view of the pump section, Figs. 6 and 7 show a conventional example, and Fig. 6 is a sectional view of the pump section. 7
The figure is an enlarged sectional view of the seal portion, and is a sectional view taken along the - line in FIG. 6. 1... Rotor, 2... Vane, 3... Cam ring, 3a... Space, 31... Shaft member (support shaft), 4
...Pump housing, 41 ...Suction port, 4
2...Discharge port, 5...Seal portion, 51...Sliding body, 511, 512...Wall portion, 513...Concave portion, 52...Elastic body, P...Pump chamber.

Claims

[Scope of utility model registration request]

A plurality of vanes protruding outward in the radial direction are provided at equal intervals on the outer periphery of the rotor, and a cam ring that can swing around a support shaft provided at one location on the outer periphery is arranged on the outer side of the rotor. Then, the tip of each vane is brought into contact with the inner circumferential surface of the cam ring to form a pump chamber between each vane, and as the rotor rotates, fluid is sequentially sucked into each pump chamber from the suction port, and each pump Fluid is sequentially discharged from the chamber to the discharge port, and the seal portion applies discharge pressure to the approximately half-circumferential space between the outer periphery of the swinging end of the cam ring, which is in liquid-tight and slidable contact with the inner peripheral surface of the pump housing, and the support shaft. In the variable displacement vane pump, the cam ring is oscillated from an eccentric position to a concentric position in accordance with the discharge pressure to adjust the discharge flow rate. It is composed of a moving body and an elastic body interposed between the sliding body and the outer circumferential surface of the cam ring to press the sliding body against the inner circumferential surface of the pump housing, and the sliding body leaves walls at both ends in the thickness direction of the cam ring. A variable capacity type characterized in that the middle part of the side surface on the cam ring side is concave, and the elastic body formed into a columnar shape is inserted into the concave part, and the end face thereof is brought into contact with the wall part of the sliding body. vane pump.