JPS58190261U

JPS58190261U - Power steering oil pump flow control device

Info

Publication number: JPS58190261U
Application number: JP8810182U
Authority: JP
Inventors: 元小塚
Original assignee: 三菱自動車工業株式会社
Priority date: 1982-06-15
Filing date: 1982-06-15
Publication date: 1983-12-17
Also published as: JPH0137973Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のパワーステアリング用オイルポンプ装置
の縦断面図、第２図Ａ、　Ｂは従来例と本案実施例の流
量特性比較図、第３図は先に開発され本案の基本構成と
なるパワーステアリング用オイルポンプの流量制御装置
を示す縦断面図、第４図は第３図に装備されるリリーフ
バルブの第１実施例を示す縦断面図、第５図は同リリー
フバルブの第２実施例を示す縦断面図である。ｂニオイルポンプ、Ｃ：高圧側油路、１ニスプール室、
２ニオリフイス、３：吐出室、４：バイパスポート、５
ニスプール、６：背圧室、６′　：ばね（スプリング）
’、１２ニオリフイス、１３：パイロット圧油路、１４
ニブランジヤー室、１５ニブランジヤー、５０゜７０：
リリーフバルブ、５２ニブランジヤー、５２′　二弁部
、５３ニブラグ、５６：スプリング、５７：流入油路、
５８：シール部、５９：環状溝、６０：流出油路、６１
：連絡油孔、７１：０ツド、７２：ロッド孔、７４．　
７５：油路。Figure 1 is a vertical cross-sectional view of a conventional oil pump device for power steering, Figure 2 A and B are comparison diagrams of the flow characteristics of the conventional example and the embodiment of the present invention, and Figure 3 is the basic configuration of the oil pump developed earlier and the present invention. A vertical sectional view showing a flow rate control device for a power steering oil pump, FIG. 4 is a vertical sectional view showing a first embodiment of the relief valve installed in FIG. 3, and FIG. 5 is a second embodiment of the same relief valve. It is a longitudinal cross-sectional view showing an example. b 2 oil pump, C: high pressure side oil path, 1 varnish spool chamber,
2 Niorifice, 3: Discharge chamber, 4: Bypass port, 5
Varnish spool, 6: Back pressure chamber, 6': Spring
', 12 Niorifice, 13: Pilot pressure oil line, 14
Nibranger chamber, 15 nibranger, 50°70:
Relief valve, 52 nib plunger, 52' two valve part, 53 nib lug, 56: spring, 57: inflow oil path,
58: Seal portion, 59: Annular groove, 60: Outflow oil path, 61
: Communication oil hole, 71: 0 hole, 72: Rod hole, 74.
75: Oil road.

Claims

[Scope of utility model registration request]

A spool chamber communicating with the high-pressure side oil passage of the oil pump, a discharge chamber communicating with the spool chamber via an orifice, a bypass port to the oil pump provided in the spool chamber, and a spool chamber energized by hydraulic pressure and a spring. In an oil pump equipped with a flow control valve consisting of a spool that adjusts the opening of the bypass port, pilot pressure supplied from the upstream side of an orifice provided in the high-pressure side oil passage is used to control the flow from the spool chamber side to the spool. A flow rate control device for an oil pump for power steering, characterized in that a plunger is provided in contact with the orifice, and relief valves with low resistance and low friction are provided between front and rear of the orifice.