JPS5934009A - Control unit of hydraulic cylinder - Google Patents
Control unit of hydraulic cylinderInfo
- Publication number
- JPS5934009A JPS5934009A JP14230082A JP14230082A JPS5934009A JP S5934009 A JPS5934009 A JP S5934009A JP 14230082 A JP14230082 A JP 14230082A JP 14230082 A JP14230082 A JP 14230082A JP S5934009 A JPS5934009 A JP S5934009A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- proportional
- reducing valve
- pressure reducing
- solenoid 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、比例減圧弁を備えた油圧シリンダのａノ制
御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a hydraulic cylinder equipped with a proportional pressure reducing valve.
この種のものとして第１図に示す装置が従来から知られ
ている。As a device of this kind, a device shown in FIG. 1 is conventionally known.
この従来の装置は、方向切換弁１を制御するために、２
つの比例弁圧弁２，３を設けている。This conventional device has two parts for controlling the directional control valve 1.
Two proportional valve pressure valves 2 and 3 are provided.
そして上記比例減圧弁２．３は、入力部４の入力信号に
応じて制御回路５が作動し、その８ノ制御回路５からの
電気信号に応じていずれか一方の比例減圧弁を切換える
構成にしている。The proportional pressure reducing valve 2.3 is configured such that a control circuit 5 is activated in response to an input signal from the input section 4, and one of the proportional pressure reducing valves is switched in response to an electric signal from the eight control circuits 5. ing.
すなわち一方の比例減圧弁２が切換わると当該シリンダ
６が伸長し、他方の比例減圧弁３が切換わると上記シリ
ンダ６が収縮する構成にしている。That is, when one proportional pressure reducing valve 2 is switched, the cylinder 6 is expanded, and when the other proportional pressure reducing valve 3 is switched, the cylinder 6 is contracted.
しかして上記従来の装置の欠点は、１つの方向切換弁１
を制御するのに、高価な比例減圧弁を２つも備えなけれ
ばならないことである。However, the drawback of the above conventional device is that only one directional valve 1
In order to control this, two expensive proportional pressure reducing valves must be provided.
この発明は、１つの方向切換弁に対しては１つの比例減
圧弁のみで制御が可能にし、前記従来よりも安価にした
油圧シリンダの制御装置の提供を目的にする。An object of the present invention is to provide a hydraulic cylinder control device that enables control of one directional switching valve with only one proportional pressure reducing valve and is cheaper than the conventional method.
以下にはこれを図示の各実施例について説明する。This will be explained below with respect to each of the illustrated embodiments.
第２図に示した第１実施例は、シリンダ１０を制御する
方向切換弁１１と、この方向切換弁１１に対するパイロ
ット通路１２．１３を選択する２位置のソレノイドバル
ブ１４と、このソレノイドバルブ１４の上流側に設けた
比例減圧弁１５とを備えている。The first embodiment shown in FIG. A proportional pressure reducing valve 15 provided on the upstream side is provided.
−１−記方向切換弁１１は図示の中立位置において、ポ
ンプ１６からの油を中立流路１７を経由してそのままタ
ンク１８に戻す。そして図示の左側位置に切換わったと
きシリンダｌＯを伸長させ、右側位置に切換わったとき
にシリンダ１０を収縮させる関係にしている。-1- In the illustrated neutral position, the directional control valve 11 returns oil from the pump 16 directly to the tank 18 via the neutral passage 17. The cylinder 10 is extended when the position is switched to the left side as shown in the figure, and the cylinder 10 is contracted when the position is switched to the right side.
また」二記ソレノイドバルブ１４は、非励磁の状態のと
きに図示の位置に保持され、連通路１８を介して一方の
パイロット通路１２を前記比例減圧弁１５に連通させる
とともに、他方のパイロット通路１３をタンク２０に連
通させる。そしてソレノイド／＜ルブ１４か［ｉｉＪ＋
磁すると、こん度は逆に他方のパイロ・ント通路１３が
比例減圧弁に連通し、一方のパイロン］・通路１２が上
記タンク２０に連通ずる構成にしている。Further, the solenoid valve 14 is held at the position shown in the figure when in a non-energized state, and communicates one pilot passage 12 with the proportional pressure reducing valve 15 via the communication passage 18, and connects the other pilot passage 13 with the proportional pressure reducing valve 15. is communicated with the tank 20. And solenoid/<Lube 14 or [iiJ+
When magnetized, conversely, the other pylon passage 13 communicates with the proportional pressure reducing valve, and one pylon passage 12 communicates with the tank 20.
さらに前記比例減圧弁１５は、後記する電気信号に比例
して駆動するが、図示の状態においては、上記連通路１
９をタンク２１に連通させる一方、上記信号に応じて切
換わったとき補助ポンプ２２と連通路１８とを連通させ
る構成にしている。Further, the proportional pressure reducing valve 15 is driven in proportion to an electric signal, which will be described later, but in the illustrated state, the proportional pressure reducing valve 15 is
9 is communicated with the tank 21, while the auxiliary pump 22 and the communication passage 18 are communicated with each other when switched in response to the above signal.
上記のようにしたソレノイドバルブ１４は、方向判別回
路２３ど接続し、比例減圧弁１５は比例制御回路２４と
接続しているが、上記両回路とも入力ｆ４Ｂ２５の入力
信号に応じて作動する関係にしている。The solenoid valve 14 configured as described above is connected to the direction discrimination circuit 23, and the proportional pressure reducing valve 15 is connected to the proportional control circuit 24, but both circuits are connected to operate in response to the input signal of input f4B25. ing.
しかして入力部２５を操作すると、その入力部２５から
の電気信号に応じて方向判別回路２３がオン、オフ制御
信号を発する。When the input section 25 is operated, the direction determination circuit 23 issues an on/off control signal in response to the electrical signal from the input section 25.
この方向判別回路２３のオン、オフ信号によってソレノ
イドバルブ１４が図示の原位置を保持したりあるいは切
換わったりする。The solenoid valve 14 maintains the original position shown in the figure or switches depending on the on/off signal of the direction determining circuit 23.
上記のように入力部２５の操作、より具体的にはそのレ
バーを操作することによって比例制御回路２４が上記レ
バー比に応じた電流を比例減圧弁１５に流す。As described above, by operating the input section 25, more specifically by operating the lever, the proportional control circuit 24 causes a current to flow through the proportional pressure reducing valve 15 in accordance with the lever ratio.
そして上記電流値に比例して比例減圧弁１５の開■面積
が決まり、補助ポンプ２２から前記パイロ・ント通路１
２あるいは１３へ流入させるパイロット圧を制御する。The opening area of the proportional pressure reducing valve 15 is determined in proportion to the above current value, and the opening area of the proportional pressure reducing valve 15 is determined from the auxiliary pump 22 to the pilot passage 1.
2 or 13 is controlled.
補助ポンプ２２からの上記パイロット圧が前記ノくイロ
ット通路１２あるいは１３に流入すると、前記方向切換
弁１１が左右いずれかに切換わる。このように方向切換
弁が左右いずれかに切換わると、シリンダ１０が伸長し
たり収縮したりするが、そのシリンダの作動速度は上記
比例減圧弁１５への入力信号によって定まる。When the pilot pressure from the auxiliary pump 22 flows into the pilot passage 12 or 13, the directional control valve 11 is switched to either the left or the right. When the directional control valve is switched to the left or right in this way, the cylinder 10 expands or contracts, and the operating speed of the cylinder is determined by the input signal to the proportional pressure reducing valve 15.
−１−記のようにこの実施例では、比例減圧弁１５の下
流側にソレノイドバルブ１４を設けので、高価な比例減
圧弁は１つで足りる。As described in -1-, in this embodiment, the solenoid valve 14 is provided downstream of the proportional pressure reducing valve 15, so one expensive proportional pressure reducing valve is sufficient.
しかもこれらソレノイドバルブと比例減圧弁とは、入力
部２５を操作することによって、同時に作動するので、
オペレータにとってもその負担が加重されない。Moreover, these solenoid valves and proportional pressure reducing valves are operated simultaneously by operating the input section 25.
The burden on the operator is not increased either.
第３図に示した第２実施例は、そのソレノイドバルブ２
６を３位置としてしかもセンターオープンとするととも
に、前記方向判別回路２３に緊急停止回路２７を接続し
ている。The second embodiment shown in FIG.
6 is set to the 3rd position and the center is open, and an emergency stop circuit 27 is connected to the direction determining circuit 23.
そして上記緊急停止回路２７は、上記方向判別回路２４
の出力をオフにする機能を保持している。The emergency stop circuit 27 is connected to the direction determination circuit 24.
retains the ability to turn off the output of
したがってたとえば比例制御回路等が故障したようなと
きに、この緊急停止回路２７を作動させれば、方向判別
回路２３の出力がオフになり、ソレノイドバルブ２６が
そのばね力によって図示の中立位置に戻る。Therefore, if the emergency stop circuit 27 is activated when the proportional control circuit or the like breaks down, the output of the direction determination circuit 23 will be turned off, and the solenoid valve 26 will return to the neutral position shown in the figure by its spring force. .
ソレノイドバルブ２６が中立位置に復帰すれば、パイロ
ット通路１２．１３がタンク２０に連通するので、方向
ｙＪ換弁１１も図示の中立位置に復帰し、当該シリンダ
１０を停止させる。When the solenoid valve 26 returns to the neutral position, the pilot passage 12.13 communicates with the tank 20, so the YJ switching valve 11 also returns to the neutral position shown, and the cylinder 10 is stopped.
なおこの第２実施例における方向判別回路２３は、上記
ソレノイドバルブ２６を左右いずれかに切換える伸縮信
号を発信する構成にしている。The direction determining circuit 23 in this second embodiment is configured to transmit an expansion/contraction signal for switching the solenoid valve 26 to either the left or right side.
さらにこの第２実施例では、急速往復動指令回路２８を
設け、この指令回路２８からの信号を方向判別回路２３
と比例制御回路２４とに伝達する構成にしている。Furthermore, in this second embodiment, a rapid reciprocating command circuit 28 is provided, and a signal from this command circuit 28 is sent to the direction determining circuit 23.
and the proportional control circuit 24.
そして上記急速往復動指令回路２日が作動すると、入力
部２５のレバー比に関係なく、上記比例制御回路２４の
出力を一定にするとともに、方向判別回路２３がソレノ
イドバルブ２６に対する伸縮信号を交〃に発信する。When the rapid reciprocating motion command circuit 2 is activated, the output of the proportional control circuit 24 is kept constant regardless of the lever ratio of the input section 25, and the direction discrimination circuit 23 exchanges an expansion/contraction signal to the solenoid valve 26. Send to.
したがって、たとえばパワーショベルのバケットの土層
しをするようなときに、この往復動指令回路２８を作動
させれば、入力部２５のレバー比に関係なく当該シリン
ダ１０を急速に往復動させることかできる。Therefore, if the reciprocating motion command circuit 28 is activated when, for example, layering the soil in the bucket of a power shovel, the cylinder 10 can be rapidly reciprocated regardless of the lever ratio of the input section 25. can.
以上の説明から明らかなように、この発明の構成は、パ
イロット圧によって切換わり、シリンダを伸長させたり
収縮させたりする方向切換弁と、この方向切換弁に対す
るパイロット通路を選択するソレノイドバルブと、この
ソレノイドバルブに補助ポンプからのパイロット圧を供
給したりその供給を阻止したりする比例減圧弁と、入力
部の入力信号に応じて電気的信号を発信し、上記ソレノ
イドバルブをその電気信号に応じ切換える方向判別回路
と、上記入力部の入力信号に応じた電気信号を発信し、
上記比例減圧弁を上記出力信号に比例して切換える比例
制御回路とを備えた点に特徴を有する。As is clear from the above description, the configuration of the present invention includes a directional control valve that is switched by pilot pressure to extend or contract a cylinder, a solenoid valve that selects a pilot passage for the directional control valve, and a solenoid valve that selects a pilot passage for the directional control valve. A proportional pressure reducing valve that supplies or blocks pilot pressure from an auxiliary pump to the solenoid valve, and a proportional pressure reducing valve that transmits an electrical signal in response to an input signal from the input section, and switches the solenoid valve in accordance with the electrical signal. A direction determination circuit and an electric signal corresponding to the input signal of the input section are transmitted,
The present invention is characterized in that it includes a proportional control circuit that switches the proportional pressure reducing valve in proportion to the output signal.
上記のように比例減圧弁とソレノイドバルブとを組合せ
たので、高価な比例減圧弁は１つで足りるようになった
。Since the proportional pressure reducing valve and the solenoid valve are combined as described above, one expensive proportional pressure reducing valve is now sufficient.
しかも比例減圧弁を１つにしてもオペノー夕の負担が太
きくなることもない。Moreover, even if only one proportional pressure reducing valve is used, the burden on the operator will not become heavy.
図面第１図は従来の制御装置の回路図、第２図はこの発
明の＄１実施例の回路図、第３図は同じく第２実施例の
回路図である。
１０・・・シリンダ、１１・・・方向切換弁、Ｉ２．１
３−・ 、＜イロットｉ路、１４．２［（−−、ソレノ
イドバルブ、１５・・・比例減圧弁、２２・・・補助ポ
ンプ、２３・・・方向判別回路、２４・・・比例制御回
路、２５・・・入力部。
代理人弁理士 鴫 宣之FIG. 1 is a circuit diagram of a conventional control device, FIG. 2 is a circuit diagram of a $1 embodiment of the present invention, and FIG. 3 is a circuit diagram of a second embodiment. 10... Cylinder, 11... Directional switching valve, I2.1
3-・, <Ilot i path, 14.2 [(--, solenoid valve, 15... proportional pressure reducing valve, 22... auxiliary pump, 23... direction discrimination circuit, 24... proportional control circuit , 25... Input section. Representative Patent Attorney Nobuyuki Shizu
Claims (1)
り収縮させたりする方向切換弁と、この方向切換弁に対
するパイロット通路を選択するソレノイドバルブと、こ
のソレノイドバルブに補助ポンプからのパイロット圧を
供給したりその供給を阻止したりする比例減圧弁と、入
力部の入力信号に応じて電気的信号を発信し、上記ソレ
ノイドバルブをその電気信号に応じて切換える方向側Ｍ
回路と、上記入力部の入力信号に応じた電気信号を発信
し、上記比例減圧弁を上記出力信号に比例して切換える
比例制御回路とを備えた油圧シリンダの制御装置。A directional valve that is switched by pilot pressure to extend or contract the cylinder, a solenoid valve that selects the pilot passage for this directional valve, and a solenoid valve that supplies pilot pressure from an auxiliary pump to the solenoid valve. A proportional pressure reducing valve that prevents the above-mentioned solenoid valve from transmitting an electric signal according to the input signal of the input section, and a direction side M that switches the solenoid valve according to the electric signal.
A control device for a hydraulic cylinder, comprising: a circuit; and a proportional control circuit that transmits an electric signal according to an input signal of the input section and switches the proportional pressure reducing valve in proportion to the output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14230082A JPS5934009A (en) | 1982-08-17 | 1982-08-17 | Control unit of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14230082A JPS5934009A (en) | 1982-08-17 | 1982-08-17 | Control unit of hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5934009A true JPS5934009A (en) | 1984-02-24 |
| JPH026361B2 JPH026361B2 (en) | 1990-02-08 |
Family
ID=15312165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14230082A Granted JPS5934009A (en) | 1982-08-17 | 1982-08-17 | Control unit of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5934009A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61194803U (en) * | 1985-05-29 | 1986-12-04 | ||
| JPS6293481U (en) * | 1985-12-03 | 1987-06-15 | ||
| JPS6344761U (en) * | 1986-09-11 | 1988-03-25 | ||
| US5005466A (en) * | 1988-04-07 | 1991-04-09 | Kabushiki Kaisha Kobe Seiko Sho | Cavitation-preventing pilot valve control system for power shovel hydraulic circuit |
| WO2016147596A1 (en) * | 2015-03-13 | 2016-09-22 | 川崎重工業株式会社 | Hydraulic system |
-
1982
- 1982-08-17 JP JP14230082A patent/JPS5934009A/en active Granted
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61194803U (en) * | 1985-05-29 | 1986-12-04 | ||
| JPS6293481U (en) * | 1985-12-03 | 1987-06-15 | ||
| JPS6344761U (en) * | 1986-09-11 | 1988-03-25 | ||
| US5005466A (en) * | 1988-04-07 | 1991-04-09 | Kabushiki Kaisha Kobe Seiko Sho | Cavitation-preventing pilot valve control system for power shovel hydraulic circuit |
| WO2016147596A1 (en) * | 2015-03-13 | 2016-09-22 | 川崎重工業株式会社 | Hydraulic system |
| JP2016169814A (en) * | 2015-03-13 | 2016-09-23 | 川崎重工業株式会社 | Hydraulic system |
| CN107429715A (en) * | 2015-03-13 | 2017-12-01 | 川崎重工业株式会社 | Oil hydraulic system |
| US20180051721A1 (en) * | 2015-03-13 | 2018-02-22 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic system |
| GB2553967A (en) * | 2015-03-13 | 2018-03-21 | Kawasaki Heavy Ind Ltd | Hydraulic system |
| US10107312B2 (en) * | 2015-03-13 | 2018-10-23 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic system |
| GB2553967B (en) * | 2015-03-13 | 2020-07-29 | Kawasaki Heavy Ind Ltd | Hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH026361B2 (en) | 1990-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1298256A2 (en) | Hydraulic system for suppression of vibrations of a working machine | |
| US6758128B2 (en) | Hydraulic circuit for working machine | |
| JPS5934009A (en) | Control unit of hydraulic cylinder | |
| JPH08105078A (en) | Variable priority device | |
| JPS595163B2 (en) | Speed control circuit for cranes, etc. | |
| JP3859818B2 (en) | Start-up prediction device for double-acting hydraulic actuator | |
| JPH0579503A (en) | Changeover device for oil pressure changeover valve | |
| JPS612908A (en) | Control valve device | |
| JPH04143334A (en) | Hydraulic control device for construction machine | |
| JP2652801B2 (en) | Excavator loader controller | |
| JPS5926601A (en) | hydraulic control device | |
| JPH0735161Y2 (en) | Hydraulic pump controller for hydraulically driven vehicles | |
| JP2003287002A (en) | Hydraulic circuit in working machinery | |
| CN220377407U (en) | Hydraulic control unit and rotary hydraulic system | |
| JP2651226B2 (en) | Operation lever device | |
| JPS6131201Y2 (en) | ||
| JP2775266B2 (en) | Control device with travel control valve | |
| JPH0246417Y2 (en) | ||
| JPS5857636B2 (en) | Hydraulic control circuit device for construction machinery | |
| JPS6128081Y2 (en) | ||
| JPS6219725Y2 (en) | ||
| JPH072732Y2 (en) | Blade control mechanism using pressure proportional control valve | |
| JPS6137204Y2 (en) | ||
| JPH0217723B2 (en) | ||
| JPS60145472A (en) | Controller for variable-capacity pump |