JPS61123785A - Discharge amount control device in hydraulic pump - Google Patents

Discharge amount control device in hydraulic pump

Info

Publication number
JPS61123785A
JPS61123785A JP59243286A JP24328684A JPS61123785A JP S61123785 A JPS61123785 A JP S61123785A JP 59243286 A JP59243286 A JP 59243286A JP 24328684 A JP24328684 A JP 24328684A JP S61123785 A JPS61123785 A JP S61123785A
Authority
JP
Japan
Prior art keywords
hydraulic pump
lever
control
discharge amount
regulating valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP59243286A
Other languages
Japanese (ja)
Inventor
Akihiro Yuhara
湯原 昭廣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP59243286A priority Critical patent/JPS61123785A/en
Publication of JPS61123785A publication Critical patent/JPS61123785A/en
Pending legal-status Critical Current

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  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To widen the flow rate control range of a hydraulic pump, by controlling the hydraulic pump such that the discharge rate control of the hydraulic pump is made with the use of a pressure regulating valve in a small manipulating range of a control lever, but is made under rotational speed control in a large manipulating range of the lever. CONSTITUTION:A control lever 15 is connected to and associated with a control lever 8 of a rotational speed control device 7 for a motor 6 and a lever 19 of a pressure regulating valve 13. When the manipulating range of the lever is small, the lever 19 is operated to carry out the discharge rate control by means of the pressure regulating valve 13, but if the manipulating range of the lever is greater than that mentioned above, the lever 8 is operated to carry out the discharge rate control of the hydraulic pump 9. With this arrangement the discharge amount per unit time of the hydraulic pump is directly known while the flow rate may be controlled to be continuously changed in a wider range from the minimum discharge rate to the maximum discharge rate.

Description

【発明の詳細な説明】 (a)産業上の利用分野 本発明は、原動機1こよって駆動される油圧ポンプの吐
出量制御装置tこ係り、特tこ最小吐出量から最大吐出
量までの広い範囲1こ亘って制御を必要とする油圧ポン
プの吐出量制御装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a discharge amount control device for a hydraulic pump driven by a prime mover 1, and in particular, to a wide range of discharge amounts from a minimum discharge amount to a maximum discharge amount. The present invention relates to a discharge amount control device for a hydraulic pump that requires control over a range 1.

(b)従来の技術 油圧ポンプの吐出量を制御する方法として、*動機の回
転数を変化させること1こより、油圧ポンプの回転数を
変化させてその吐出量を制御する、いわゆる゛原動機の
回転数制御と、油圧ポンプを可変容量形にしてその制御
シリンダを作動させて吐出量を制御する場合とがあるが
、低速域から高速域まで高範囲に亘る速度制御を必要と
するクレーン等の作業機1ζおいては、それらを別々に
操作しているため、油圧ポンプの時間当りの吐出量がど
の程度になっているのかを直接把握することができない
ので、効率の良い油圧ポンプの吐出量制御を行なうこと
ができなかった。
(b) Conventional technology As a method of controlling the discharge amount of a hydraulic pump, there is a method of controlling the discharge amount by changing the rotation speed of the hydraulic pump. In some cases, the discharge volume is controlled by variable-displacement hydraulic pumps and the control cylinders are activated to control the discharge volume, but cranes, etc., require speed control over a wide range from low speeds to high speeds. In machine 1ζ, since they are operated separately, it is not possible to directly grasp the hourly discharge volume of the hydraulic pump, so it is possible to control the discharge volume of the hydraulic pump efficiently. was unable to do so.

(C)発明が解決しようとする問題点 本発明は、上記の問題点を解決するためになされたもの
で、その目的とするところは、油圧ポンプの時間当りの
吐出量を直接把握しながら、最小吐出量f)zら最大吐
出量までの広い範囲]ζ亘って制御できる油圧ポンプの
吐出量制御装置を提供すること1とある。
(C) Problems to be Solved by the Invention The present invention has been made to solve the above problems, and its purpose is to directly grasp the discharge amount per hour of the hydraulic pump, and to It is an object of the present invention to provide a discharge amount control device for a hydraulic pump that can control a wide range from the minimum discharge amount f)z to the maximum discharge amount.

(d)問題点を解決するための手段 この目的を達成するため]ζ本発明は、原動機によって
駆動される可変容量杉油圧ポンプと、該油圧ポンプの吐
出量を制御する調圧弁とを有する油圧ポンプの吐出量制
御装置(こおいて、前記原動機の回転数を制御する制御
レバーと、前記調圧弁の制御レバーとを1本の操作レバ
ー1こ連動連結し、該操作レバーの小さい操作範囲では
、原動機の最小回転数状態に怠ける調圧弁の作動による
油圧ポンプの吐出量制御を行ない、それを超えた大きい
操作範囲では、原動機の最小回転数から最大回転数まで
の回転数制御1こよる油圧ポンプの吐出量制御を行なう
よう1こ構成したことを特徴とする。
(d) Means for solving the problem In order to achieve this object] ζ The present invention provides a hydraulic system having a variable capacity cedar hydraulic pump driven by a prime mover, and a pressure regulating valve for controlling the discharge amount of the hydraulic pump. A pump discharge amount control device (in which a control lever for controlling the rotation speed of the prime mover and a control lever for the pressure regulating valve are interlocked and connected to one operating lever, and in a small operating range of the operating lever, , the discharge amount of the hydraulic pump is controlled by operating the pressure regulating valve that is idle at the minimum rotational speed of the prime mover, and in a large operating range beyond that, the hydraulic pressure is controlled by the rotational speed from the minimum rotational speed to the maximum rotational speed of the prime mover. The present invention is characterized in that it is configured to control the discharge amount of the pump.

(+5)実施例 以下、本発明の一実施例を第1図乃至第7図を用いて、
さら1こ具体的に説明する。第1図は1本発明の油圧ポ
ンプの吐出量制御装置を備えたクレーン等1こ2ける巻
上ウィンチの油圧回路図である。1は巻上ドラム、2は
巻上ドラム1を駆動するアクチュエータとしての油圧モ
ータ、3は巻上ドラム1を巻下げた時の油圧モータ2の
逸走を防止するカウンタバランス弁、4は油圧モータ2
の回転方向を制御する方向側@弁、5は油圧モータ2の
駆動回路の最高圧力を規制するIJ IJ−フ弁である
(+5) Example Hereinafter, an example of the present invention will be explained using FIGS. 1 to 7.
Let me explain one more thing in detail. FIG. 1 is a hydraulic circuit diagram of a hoisting winch for a crane or the like equipped with a hydraulic pump discharge amount control device according to the present invention. 1 is a hoisting drum, 2 is a hydraulic motor as an actuator that drives the hoisting drum 1, 3 is a counterbalance valve that prevents the hydraulic motor 2 from running away when the hoisting drum 1 is lowered, and 4 is a hydraulic motor 2.
5 is an IJ-F valve that regulates the maximum pressure of the drive circuit of the hydraulic motor 2.

可変容量形油圧ポンプc以下油圧ポンプという)9から
吐出された圧油は、方向制御弁4を通って作動油タンク
14に戻るよろ1こなっており、方向制御弁4を作動さ
せること1こより、前記圧油は油圧モータ2番こ供給さ
れ、油圧ポンプ9の吐出量りこ比例した回転数1どよっ
て油圧モータ2が駆動される。一方、原動機6により駆
動される制御用油圧ポンプ10から吐出された圧油は、
調圧弁13を通って油圧ポンプ9の1回転当りの吐出量
qを制御する制御シリンダ111こ供給されている。ま
た余った圧油は、IJ IJ−フ弁12を通って作動油
タンク14に戻るようになっている。
The pressure oil discharged from the variable displacement hydraulic pump c (hereinafter referred to as hydraulic pump) 9 passes through the directional control valve 4 and returns to the hydraulic oil tank 14. The pressure oil is supplied to the second hydraulic motor, and the hydraulic motor 2 is driven by a rotational speed 1 proportional to the discharge amount of the hydraulic pump 9. On the other hand, the pressure oil discharged from the control hydraulic pump 10 driven by the prime mover 6 is
A control cylinder 111 that controls the discharge amount q per rotation of the hydraulic pump 9 is supplied through the pressure regulating valve 13 . Further, the remaining pressure oil is returned to the hydraulic oil tank 14 through the IJ valve 12.

第5図は調圧弁13の特性図を示したもので、縦軸は調
圧$13の2次圧力、横軸は調圧弁13の操作ストロー
クである。操作ストローク81〜&の変化に応じて制御
シリンダ11に作用する圧力がP8〜Ptjc変化する
ようになっている。
FIG. 5 shows a characteristic diagram of the pressure regulating valve 13, in which the vertical axis is the secondary pressure of the pressure regulating $13, and the horizontal axis is the operating stroke of the pressure regulating valve 13. The pressure acting on the control cylinder 11 changes by P8 to Ptjc in response to changes in the operating strokes 81 to &.

第6図は油圧ポンプ9の吐出量特性図を示したもめで、
縦軸はポンプ1回転当りの吐出量、横軸は制御シリンダ
11]こ作用する圧力である。しかして、油圧ポンプ9
の1回転当りの吐出量qは、制御シリンダ111こ作用
させた圧力P、〜P、の変化1こ応じて屯〜q、に変化
するよう1こなっている。
FIG. 6 is a diagram showing the discharge amount characteristics of the hydraulic pump 9.
The vertical axis represents the discharge amount per pump revolution, and the horizontal axis represents the pressure acting on the control cylinder 11. However, the hydraulic pump 9
The discharge amount q per rotation of the control cylinder 111 changes by 1 to q in response to a change in the pressure P, .about.P, applied to the control cylinder 111.

運転席1こ設けらnた操作レバー15の中間部Iこは、
レバー17とレバー16とが接続されている。レバー1
7はコントロールケーブル18を介して原動機6の回転
数制御装置7の制御レバー81こ接続されており、操作
レバー15の操作位置に応じて最小回転数N、から最大
回転数Nまで制御できるよう番こなっている。レバー1
6は調圧弁131こ接続されたレバー19を押し込むよ
うになっており、制御シリンダ111こ作用する圧力を
P、からP。
The middle part of the operating lever 15 is provided with one driver's seat.
Lever 17 and lever 16 are connected. Lever 1
7 is connected to a control lever 81 of the rotation speed control device 7 of the prime mover 6 via a control cable 18, and is numbered so that the rotation speed can be controlled from the minimum rotation speed N to the maximum rotation speed N depending on the operating position of the control lever 15. It's happening. Lever 1
6 is designed to push in the lever 19 connected to the pressure regulating valve 131, and the pressure acting on the control cylinder 111 is changed from P to P.

に制御できるようになっている。レバー19と係合する
レバー16の端部1こは案内溝16aが設けられて忘り
、操作レバー15を第2図のB位置からA位置1こ回動
させた場合、コントロールケーブル18は引張られるが
、第3図に示すよう1こレバー19は作動しないように
なっている。また、レバー17と保合するコントロール
ケーブル18の端部1こは案内1111181が設けら
れており、操作レバー15を第2図のB位置からC位置
に回動させた場合、レバー16)こよりレバー19は押
し込まれるがS第4図に示すよう1こコントロールケー
ブル18は作動しないので、制御レバー8は作動しない
ようになっている。
can be controlled. One end of the lever 16 that engages with the lever 19 is provided with a guide groove 16a, and when the operating lever 15 is rotated one turn from the B position to the A position in FIG. 2, the control cable 18 is pulled. However, as shown in FIG. 3, the lever 19 is not operated. In addition, a guide 1111181 is provided at one end of the control cable 18 that engages with the lever 17, so that when the operating lever 15 is rotated from the B position to the C position in FIG. 19 is pushed in, but as shown in FIG. 4, the single control cable 18 is not activated, so the control lever 8 is not activated.

次)ζ、本発明の詳細な説明する。第7図は本発明によ
る油圧ポンプの吐出量線図を示したもので、縦軸は油圧
ポンプ9の吐出量、横軸は操作レバー15の操作位置を
示している。上記した構成により、油圧ポンプ9から吐
出される圧油の量は、操作レバー15のストロークに応
じて第7図に示すよう1こ最大流量Q*= q、X N
tから原動機6の最小回転数時の流量Qx=(IIX 
Nlまでと、原動機6の最小回転数N、の状態でQ、か
らQa = qt X Ntまで連続的1こ制御される
。従って、巻上ウィンチの油圧モータ2の回転数も圧油
の流量に応じて広い範囲1こ亘って制御されることにな
る。
Next) ζ A detailed explanation of the present invention will be given. FIG. 7 shows a discharge amount diagram of the hydraulic pump according to the present invention, in which the vertical axis indicates the discharge amount of the hydraulic pump 9, and the horizontal axis indicates the operating position of the operating lever 15. With the above configuration, the amount of pressure oil discharged from the hydraulic pump 9 varies depending on the stroke of the operating lever 15, as shown in FIG.
From t to flow rate Qx at the minimum rotation speed of the prime mover 6 = (IIX
Nl and the minimum rotational speed N of the prime mover 6 is continuously controlled from Q to Qa = qt x Nt. Therefore, the rotation speed of the hydraulic motor 2 of the hoisting winch is also controlled over a wide range according to the flow rate of the pressure oil.

尚、本実施例では、油圧ポンプ9の制御を制御シリンダ
11を作動させることにより行なっているが、制御シリ
ンダ11を用いず1ζ直接ケーブル等で制御できること
はもちろんである。
In this embodiment, the hydraulic pump 9 is controlled by operating the control cylinder 11, but it is of course possible to control the hydraulic pump 9 directly by a cable or the like without using the control cylinder 11.

(1発明の効果 以上述べたよう(こ、本発明ICよれば、原動機によっ
て駆動される可変容量杉油圧ポンプを用いた油圧ポンプ
の吐出量制御装置1ζgいて、原動機の回転数を制御す
る制御レバーと、油圧ポンプの吐出量を制御する調圧弁
の附御しバー七を1本の操作レバーに連動連結したので
、油圧ポンプの時間当りの吐出量を直接把握しながら、
最小吐出量から最大吐出量まで広い範囲1こ亘って通続
的1こ制御できる。従って、効率の良い油圧ポンプの吐
出量制御を行なうことができる効果を奏するものである
(1) Effects of the Invention As described above, according to the IC of the present invention, a hydraulic pump discharge amount control device 1ζg using a variable displacement cedar hydraulic pump driven by a prime mover is used to control the rotation speed of the prime mover. Since the control bar 7 of the pressure regulating valve that controls the discharge amount of the hydraulic pump is linked to one operating lever, it is possible to directly grasp the discharge amount per hour of the hydraulic pump.
Continuous control is possible over a wide range from the minimum discharge amount to the maximum discharge amount. Therefore, it is possible to efficiently control the discharge amount of the hydraulic pump.

【図面の簡単な説明】[Brief explanation of drawings]

第1図乃至第7図は本発明の一実施例を示したもので、
第1図は本発明の制御装置を備えた油圧ポンプの駆動回
路図、第2図乃至第4図は操作レバーの作動説明図、第
5図は調圧弁の特性図、第6図は可変容量杉油圧ポンプ
の吐出量特性図、第7図は本発明1こよる油圧ポンプの
吐出量線図である。 6・・原動機、  8・・制御レバー、9・・可変容量
杉油圧ポンプ、   13・・調圧弁、   15・・
操作レバー、   19・・制御レバー 第1図 第2図
1 to 7 show an embodiment of the present invention,
Fig. 1 is a drive circuit diagram of a hydraulic pump equipped with the control device of the present invention, Figs. 2 to 4 are explanatory diagrams of operation of the operating lever, Fig. 5 is a characteristic diagram of the pressure regulating valve, and Fig. 6 is a variable displacement displacement diagram. Fig. 7 is a discharge quantity characteristic diagram of a hydraulic pump according to the present invention. 6. Prime mover, 8. Control lever, 9. Variable capacity cedar hydraulic pump, 13. Pressure regulating valve, 15.
Operation lever, 19...Control lever Fig. 1 Fig. 2

Claims (1)

【特許請求の範囲】[Claims] 原動機によつて駆動される可変容量形油圧ポンプと、該
油圧ポンプの吐出量を制御する調圧弁とを有する油圧ポ
ンプの吐出量制御装置において、前記原動機の回転数を
制御する制御レバーと、前記調圧弁の制御レバーとを1
本の操作レバーに連動連結し、該操作レバーの小さい操
作範囲では、原動機の最小回転数状態における調圧弁の
作動による油圧ポンプの吐出量制御を行ない、それを超
えた大きい操作範囲では、原動機の最小回転数から最大
回転数までの回転数制御による油圧ポンプの吐出量制御
を行なうように構成したことを特徴とする油圧ポンプの
吐出量制御装置。
A hydraulic pump discharge amount control device comprising a variable displacement hydraulic pump driven by a prime mover and a pressure regulating valve that controls the discharge amount of the hydraulic pump, a control lever that controls the rotation speed of the prime mover; Pressure regulating valve control lever and
In the small operation range of this control lever, the discharge amount of the hydraulic pump is controlled by the operation of the pressure regulating valve in the state of the minimum rotation speed of the prime mover, and in the large operation range beyond that, the discharge amount of the hydraulic pump is controlled by 1. A discharge amount control device for a hydraulic pump, characterized in that it is configured to control the discharge amount of a hydraulic pump by controlling the rotation speed from a minimum rotation speed to a maximum rotation speed.
JP59243286A 1984-11-20 1984-11-20 Discharge amount control device in hydraulic pump Pending JPS61123785A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59243286A JPS61123785A (en) 1984-11-20 1984-11-20 Discharge amount control device in hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59243286A JPS61123785A (en) 1984-11-20 1984-11-20 Discharge amount control device in hydraulic pump

Publications (1)

Publication Number Publication Date
JPS61123785A true JPS61123785A (en) 1986-06-11

Family

ID=17101588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59243286A Pending JPS61123785A (en) 1984-11-20 1984-11-20 Discharge amount control device in hydraulic pump

Country Status (1)

Country Link
JP (1) JPS61123785A (en)

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