JPS6057794U

JPS6057794U - Discharge rate control device for variable discharge rate pump

Info

Publication number: JPS6057794U
Application number: JP14880883U
Authority: JP
Inventors: 杉岡　勲
Original assignee: 株式会社日本製鋼所
Priority date: 1983-09-28
Filing date: 1983-09-28
Publication date: 1985-04-22

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図は従来の可変吐出量ポンプの吐出量制御装置の説
明図。第２図は流量カットオフ線図。第３図は本考案の
吐出量制御装置のスプールの断面図。第４図は本考案に
よる可変吐出量ポンプの吐出量制御装置の説明図である
。１・・・・・・ケース、ＩＡ・・・・・・穴、ＩＢ・・
・・・・ねじ穴、ＩＣ・・・・・・ばね室、ＩＤ・・・
・・・第１の流路、ＩＥ・・・・・・第２の流路、ＩＦ
・・・・・・第３の流路、ＩＧ・・・・・・第４の流路
、２・・・・・・スプール、２Ａ、２Ｂ・・・・・・ラ
ンド、２Ｃ・・・・・・絞り、２Ｄ・・・・・・絞り穴
、２Ｅ・・・・・・連通穴、３・・・・・・圧力調整ね
じ、４・・・・・・ばね受け、５・・・・・・ばね、６
・・・・・・圧力室、７・・・・・・室、訃・・・・・
可変吐出量ポンプ、９・・・・・・ストローク調整装置
、９Ａ・・・・・・油室、１０・・・・・・タンク、１
８・・・・・・圧力調整弁、２１・・・・・・制御弁。FIG. 1 is an explanatory diagram of a discharge amount control device for a conventional variable discharge amount pump. Figure 2 is a flow rate cutoff diagram. FIG. 3 is a sectional view of the spool of the discharge amount control device of the present invention. FIG. 4 is an explanatory diagram of a discharge rate control device for a variable discharge rate pump according to the present invention. 1...Case, IA...hole, IB...
...screw hole, IC...spring chamber, ID...
...First flow path, IE...Second flow path, IF
...Third channel, IG... Fourth channel, 2... Spool, 2A, 2B... Land, 2C... ...Aperture, 2D...Aperture hole, 2E...Communication hole, 3...Pressure adjustment screw, 4...Spring receiver, 5...・Spring, 6
...pressure chamber, 7...chamber, death...
Variable discharge amount pump, 9... Stroke adjustment device, 9A... Oil chamber, 10... Tank, 1
8...Pressure regulating valve, 21...Control valve.

Claims

[Scope of utility model registration request]

A case 1, a spool 2 that is slidably fitted into a hole IA provided in the case 1 and has two lands 2A and 2B, and a screw hole provided on the side facing the hole IA of the case 1. 1B; a spring receiver 4 provided in the spring chamber 1C provided between the hole IA and the screw hole IB of the case 1 and brought into contact with one end of the spool 2;
A spring 5 is provided between the spring receiver 4 and the pressure adjusting screw 3, and acts to move the spool 2 away from the pressure adjusting screw 3 via the spring receiver 4. A first flow path ID that opens into a pressure chamber 6 formed on one end surface side of the land 2A, and a second flow path ID of the spool 2.
A second flow path IE that opens into the chamber 7 formed between the two lands 2A and 2B, and a third flow path that opens at a position where communication with the chamber 7 is controlled by one land 2A of the spool 2. I
F, and a fourth flow path 1G opening into the spring chamber 1C,
The discharge pressure of the variable discharge amount pump 8 is introduced into the pressure chamber 6, the oil chamber 9A of the stroke adjustment device 9 of the variable discharge amount pump 8 and the tank 10 are communicated via the chamber 7, and the spring chamber IC and the tank 10 are connected. In a discharge rate control device for a variable discharge rate pump that communicates with a throttle hole 2 having a throttle 2C in a spool 2
D, pressure chamber 6 and throttle hole 2D on the pressure chamber 6 side of spool 2
In addition to providing a communication hole 2E that communicates with the
8. A discharge rate control device for a variable discharge rate pump, characterized in that: