JPS58118303A - Regenerative circuit in fluid pressure circuit - Google Patents

Regenerative circuit in fluid pressure circuit

Info

Publication number
JPS58118303A
JPS58118303A JP56213934A JP21393481A JPS58118303A JP S58118303 A JPS58118303 A JP S58118303A JP 56213934 A JP56213934 A JP 56213934A JP 21393481 A JP21393481 A JP 21393481A JP S58118303 A JPS58118303 A JP S58118303A
Authority
JP
Japan
Prior art keywords
passage
valve
circuit
short
cylinder
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
JP56213934A
Other languages
Japanese (ja)
Inventor
Yoshihiko Kitadate
北舘　善彦
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.)
IHI Corp
Kato Heavy Industries Construction Machinery Co Ltd
Original Assignee
IHI Corp
Ishikawajima 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 IHI Corp, Ishikawajima Construction Machinery Co Ltd filed Critical IHI Corp
Priority to JP56213934A priority Critical patent/JPS58118303A/en
Publication of JPS58118303A publication Critical patent/JPS58118303A/en
Pending legal-status Critical Current

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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0246—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits with variable regeneration flow
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/353—Flow control by regulating means in return line, i.e. meter-out control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves
    • F15B2211/5059—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves using double counterbalance valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve
    • F15B2211/5154—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an output member

Abstract

PURPOSE:To prevent a breathing phenomenon of an actuator by flowing a part of discharged fluid through a short-circuit passage between forward and return passages and providing a flow rate adjustment valve downstream from a short- circuit point of the return passage in case fluid supply of an actuator is less in quantity than discharging flow of the same. CONSTITUTION:An electromagnetic control valve 12, a selector valve 8 and a hydraulic motor 9 are connected to a cylinder 1. Only a forward passage and a return passage are formed on one block 14 of the control valve 12 and are short- circuited to a forward passage 16 and a return passage 17 on the other block 15 through a check valve 18 so that pressurized oil flows from the return passage 17 to the forward passage 16, and a flow rate adjustment valve 19 is provided downstream from a short-circuit point of said return passage 17. When a lever 13 is operated, and the selector valve 8 is placed in (d) position, and further the control valve 12 is excited and placed in (a) position, oil supply to the cylinder 1 is performed in proper quantities. Accordingly, a breathing phenomenon of the actuator is prevented.

Description

【発明の詳細な説明】 本兄明は流体圧力回路に連結したアクチュエータ、例え
ばシリンダに負荷重から正荷重が作用した場合に起きる
息付現象を防止する為の再生回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a regeneration circuit for preventing a breathing phenomenon that occurs when a positive load is applied to an actuator, such as a cylinder, connected to a fluid pressure circuit.

油圧ショベル等アタッチメントに使用している油圧シリ
ンダに於いて第１図に示す如き使用時（自由により降下
させる操作）は、ポンプの作動が中、低速運転の場合等
ポンプによりシリンダに供給する油量がピストンの移動
に必要な油量よシも少ないことが往々に生じ、／リンダ
内の供給側が真空状態となり、中立位置に於いてシリン
ダに油が充満する１で止ってし１う（通称息付）現象が
起こる。When a hydraulic cylinder used for an attachment such as a hydraulic excavator is used as shown in Figure 1 (freely lowering operation), the amount of oil supplied to the cylinder by the pump is However, it often happens that the amount of oil required to move the piston is small, and the supply side in the cylinder becomes a vacuum state, and the cylinder stops at 1 when it is filled with oil at the neutral position (commonly known as 1). Attachment) A phenomenon occurs.

図中（ａ）は油圧シリンダ、（ｂ）はピストン、ｆｃ）
は荷、（％）は中立点を示す。In the figure, (a) is a hydraulic cylinder, (b) is a piston, fc)
indicates the load, and (%) indicates the neutral point.

第２図は従来の流体圧力回路を示し、図示しない油圧シ
ョベルに連結した油圧シリンダ（１）、オーバロードリ
リーフバルブ（２）　（３）、逆止弁（４）　（６）、
往路復路にそれぞれ逆止弁（６）　（７）　を備えた切
換弁（８）、油圧ポンプ（９）、油タンク閲を図示の如
く接続したものである。この流体圧力回路で油圧ポンプ
（９）の作動油供給量が少ない場合、例えばエンジンが
アイドリング状態で油圧ポンプ（９）の回転数が低い場
合に前記した如き負荷重から正荷重に変化する荷重がシ
リンダ（１）に作用すると、作動油供給量がシリンダ（
１）のピストンの動きに追従し得す息付現象が起る。FIG. 2 shows a conventional fluid pressure circuit, including a hydraulic cylinder (1) connected to a hydraulic excavator (not shown), overload relief valves (2) (3), check valves (4) (6),
A switching valve (8) equipped with check valves (6) and (7), a hydraulic pump (9), and an oil tank control are connected as shown in the diagram on the forward and return routes. In this fluid pressure circuit, when the amount of hydraulic oil supplied to the hydraulic pump (9) is small, for example, when the engine is idling and the rotation speed of the hydraulic pump (9) is low, the load changes from the load weight to the positive load as described above. When acting on the cylinder (1), the amount of hydraulic oil supplied to the cylinder (
1) A breathing phenomenon occurs that can follow the movement of the piston.

第３図は斯かる思付現象を防止すべく改良を加えた例を
示している。即ち第２図に於いて示した流体圧力口に！
ｒの戻り回路側に固定又は可変の絞シ弁αυを設けて荷
パシリンダー移動）の自由落下速度を押えて作動油供給
量の不足を補うようにしたものである。、この回路では
思付現象を防止することはできるか、絞り効果分だけシ
リンダ作動速度が遅くなり、つｌ）は作業サイクルタイ
ムが遅くなシ装置の作業効率を低下させる。FIG. 3 shows an example in which improvements have been made to prevent such a random phenomenon. That is, to the fluid pressure port shown in Figure 2!
A fixed or variable throttle valve αυ is provided on the return circuit side of r to suppress the free fall speed of the cargo cylinder (moving) to compensate for the lack of hydraulic oil supply. In this circuit, it is possible to prevent the flash phenomenon, but the cylinder operating speed is slowed down by the throttling effect, which lowers the working efficiency of the device with slow working cycle time.

本発明は思付現象を防止し、しかも作業スピードを向上
させると共に円滑な作業を可能ならしめるものであって
、流体圧力回路に連結したアクチーエータへの作動流体
供給量がアクチーエータからの作動流体量よりも少なく
なった状態に於いて、排出側作動流体の一部を供給側へ
分流せしめる様往路と復路とを短絡すると共に復路の前
記短絡箇所よシ下流に流量調整弁を設けたことを特徴と
するものである。The present invention prevents accidental phenomena, improves work speed, and enables smooth work, and the amount of working fluid supplied to the actuator connected to the fluid pressure circuit is greater than the amount of working fluid from the actuator. The present invention is characterized by short-circuiting the outgoing path and the returning path so as to divert a part of the working fluid on the discharge side to the supply side when the working fluid is low, and a flow rate adjustment valve is provided downstream of the short-circuited point in the returning path. It is something to do.

以下第４図を参照しつつ本発明の詳細な説明する。The present invention will be described in detail below with reference to FIG.

シリンダ（１）に電磁制御弁Ｑｇｌ、該制御弁制御弁に
切換弁（８）、切換弁（８）に油圧モータ（９）を接続
して流体圧力回路を構成し、又切換弁（８）と操作レバ
ー（至）と連結し、操作レバー０４の動きと連動して切
換弁（８）の位置が切換わる様にし、更に制御弁（２）
と操作レバー０３とを電気的に接続し操作レノ（−（２
）の位置に応じて、制御弁θ″２Ｊが励磁作動する様に
なっている。A fluid pressure circuit is constructed by connecting an electromagnetic control valve Qgl to the cylinder (1), a switching valve (8) to the control valve, and a hydraulic motor (9) to the switching valve (8). and the control lever (to) so that the position of the switching valve (8) changes in conjunction with the movement of the control lever (04), and the control valve (2)
and the operating lever 03 are electrically connected and the operating lever (-(2)
), the control valve θ''2J is energized.

ここで、前記制御弁（６）の一方のブロックＱ４ｉに単
に往路、復路が形成されており、他方のブロック（至）
の往路ａηと復路（至）とは逆止弁Ｉ、Ｉ４を介して、
復路αりから往路（２）へ圧油が流れ得る様短絡し、又
該復路ａカの短絡箇所より下流に流量調整弁Ｑ鋳を設け
る。Here, one block Q4i of the control valve (6) simply has an outgoing path and a returning path, and the other block (toward)
The outbound path aη and the return path (to) are via check valves I and I4,
A short circuit is made so that pressure oil can flow from the return path α to the outbound path (2), and a flow rate regulating valve Q is provided downstream from the short circuit point on the return path a.

次に作動を説明する。Next, the operation will be explained.

今、ピスト／翰が図中左方へ移動している状態で自由落
下しているとし、その状態でのロッド側への油流入Ｊｔ
ｅｌ＝Ｊｔ−シリンダヘッド１１１］からの油排出量を
Ｑ２、ポンプ（９）からの油供給頁をＱｐとすると、Ｑ
ｌ＞Ｑ、となると思付現象を起こす。Now, let us assume that the piston/rod is moving to the left in the figure and is in free fall, and in that state the oil inflows to the rod side Jt
el = Jt - If the amount of oil discharged from the cylinder head 111 is Q2, and the oil supply page from the pump (9) is Qp, then Q
When l>Q, an afterthought phenomenon occurs.

従ってＱｓ　　Ｑｐ　＝Ｑｇだけ増量してやればよい。Therefore, it is only necessary to increase the amount by Qs Qp = Qg.

この増量分を排出神−Ｑｚより補うとすればＱ２−Ｑｚ
＝Ｑｙ、即ち、逆止弁（ト）を通って９８分だけ往路−
へ分流し、流量調整弁（６）を通る油量は喝であるよう
に流量調整弁（６）を調整してやればよい。If this increase is compensated for by the discharge God -Qz, then Q2-Qz
= Qy, that is, the outward journey for 98 minutes through the check valve (G) -
The flow rate adjustment valve (6) may be adjusted so that the amount of oil passing through the flow rate adjustment valve (6) is just enough.

而して、レバーＱＣ（を操作して、切換弁（８）をｄ位
置とし、更に制御弁（２）を励磁して６位置とすると、
シリンダ（１）への油供給が過不足なく行われて、思付
現象を起こすことがない。Then, by operating the lever QC, the switching valve (8) is set to the d position, and the control valve (2) is further energized to the 6th position.
Oil is supplied to the cylinder (1) in just the right amount and no oil is caused.

尚、ピストン四が右方へ移動している状態で自由落下す
る４会の息付現尿も同様に防止することができる。更に
、流量調整弁翰はポンプの油吐出量、ピストンの速度に
応じて適宜調姫する。Incidentally, it is also possible to prevent the exudate of the piston 4 from freely falling while the piston 4 is moving to the right. Further, the flow rate regulating valve is adjusted as appropriate depending on the oil discharge amount of the pump and the speed of the piston.

尚、上記実施例は制御弁を電気式にフィードバックした
が、レバーの変位、切換弁のノくルブスプールの変位等
を利用して油圧式、機械式で作動させ得ることは勿論で
ある。In the above embodiment, the control valve is fed back electrically, but it is of course possible to operate the control valve hydraulically or mechanically using displacement of a lever, displacement of a knob spool of a switching valve, etc.

以上述べた如く本発明によれば、シリンダ等のアクチュ
エータの作動スピードを制限することなく作動油供給菫
の不足から生ずる思付現象を防止し得るので作動スピー
ドを向上させしかも円滑な作業をすることができる。As described above, according to the present invention, it is possible to prevent the flashing phenomenon caused by a lack of hydraulic oil supply without restricting the operating speed of actuators such as cylinders, thereby improving the operating speed and performing smooth work. I can do it.

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

第１図は流体圧力回路に連結したシリンダと負荷状態を
示す説明図、第２図は従来の一般的な流体圧力回路図、
第５図は改良を加えた従来の流体圧力回路図、第４図は
本発明の実施例の流体圧力回路図である。 （１）　Ｆｉシリンダ、０４は制御弁、叫は往路、αη
は復路、（７）は逆止弁、α燵は流量ｉｉｌ＃ｌ整升を
示す。Fig. 1 is an explanatory diagram showing the cylinders connected to the fluid pressure circuit and the load state, Fig. 2 is a conventional general fluid pressure circuit diagram,
FIG. 5 is a conventional fluid pressure circuit diagram with improvements, and FIG. 4 is a fluid pressure circuit diagram of an embodiment of the present invention. (1) Fi cylinder, 04 is the control valve, scream is the outward path, αη
indicates the return path, (7) indicates the check valve, and α kettle indicates the flow rate iil#l adjustment.

Claims (1)

【特許請求の範囲】[Claims] １）流体圧力回路に連結したアクチェエータへの作動流
体供給量がアクチュエータからの作動流体量よりも少な
くなった状態に於いて、排出側作動流体の一部を供給側
へ分流せしめる様往路と復路とを短絡すると共に復路の
前記短絡箇所より下流に流量調整弁を設けたことを特許
とする流体圧力回路に於ける阿生回命。1) In a state where the amount of working fluid supplied to the actuator connected to the fluid pressure circuit is smaller than the amount of working fluid from the actuator, a part of the working fluid on the discharge side is diverted to the supply side. The invention is based on a patented fluid pressure circuit in which a flow rate adjustment valve is provided downstream from the short-circuit point on the return path.
JP56213934A 1981-12-29 1981-12-29 Regenerative circuit in fluid pressure circuit Pending JPS58118303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56213934A JPS58118303A (en) 1981-12-29 1981-12-29 Regenerative circuit in fluid pressure circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56213934A JPS58118303A (en) 1981-12-29 1981-12-29 Regenerative circuit in fluid pressure circuit

Publications (1)

Publication Number Publication Date
JPS58118303A true JPS58118303A (en) 1983-07-14

Family

ID=16647460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56213934A Pending JPS58118303A (en) 1981-12-29 1981-12-29 Regenerative circuit in fluid pressure circuit

Country Status (1)

Country Link
JP (1) JPS58118303A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62278301A (en) * 1986-05-27 1987-12-03 Yutani Heavy Ind Ltd Variably regenerating circuit
JPH0259305U (en) * 1988-10-24 1990-04-27
US5046312A (en) * 1988-07-08 1991-09-10 Kubota, Ltd. Swivel speed control circuit for working vehicle
JPH06117415A (en) * 1991-02-15 1994-04-26 Yutani Heavy Ind Ltd Variable regeneration circuit
KR100468623B1 (en) * 2001-12-12 2005-01-27 한일유압 주식회사 Feedback apparatus of control valve having arm feedback spool in excavator
JP2010210072A (en) * 2009-03-12 2010-09-24 Sumitomo (Shi) Construction Machinery Co Ltd Hydraulic control system for working machine
WO2012105345A1 (en) * 2011-02-03 2012-08-09 日立建機株式会社 Power regeneration device for work machine
CN103225632A (en) * 2012-01-27 2013-07-31 罗伯特·博世有限公司 Valve assembly for a mobile work machine
WO2018056036A1 (en) * 2016-09-21 2018-03-29 Smc Corporation Driving method and driving device of fluid pressure cylinder
JP2018054118A (en) * 2016-09-21 2018-04-05 Smc株式会社 Fluid pressure cylinder
KR20190052116A (en) * 2016-09-21 2019-05-15 에스엠시 가부시키가이샤 Method and apparatus for driving a fluid pressure cylinder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4823035U (en) * 1971-07-24 1973-03-16
JPS493554U (en) * 1972-04-11 1974-01-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4823035U (en) * 1971-07-24 1973-03-16
JPS493554U (en) * 1972-04-11 1974-01-12

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62278301A (en) * 1986-05-27 1987-12-03 Yutani Heavy Ind Ltd Variably regenerating circuit
JPH0550601B2 (en) * 1986-05-27 1993-07-29 Yutani Juko Kk
US5046312A (en) * 1988-07-08 1991-09-10 Kubota, Ltd. Swivel speed control circuit for working vehicle
JPH0259305U (en) * 1988-10-24 1990-04-27
JPH06117415A (en) * 1991-02-15 1994-04-26 Yutani Heavy Ind Ltd Variable regeneration circuit
KR100468623B1 (en) * 2001-12-12 2005-01-27 한일유압 주식회사 Feedback apparatus of control valve having arm feedback spool in excavator
JP2010210072A (en) * 2009-03-12 2010-09-24 Sumitomo (Shi) Construction Machinery Co Ltd Hydraulic control system for working machine
US8659177B2 (en) 2011-02-03 2014-02-25 Hitachi Construction Machinery Co., Ltd. Motive power regeneration system for working machine
JP5681732B2 (en) * 2011-02-03 2015-03-11 日立建機株式会社 Power regeneration device for work machines
CN102971542A (en) * 2011-02-03 2013-03-13 日立建机株式会社 Power regeneration device for work machine
WO2012105345A1 (en) * 2011-02-03 2012-08-09 日立建機株式会社 Power regeneration device for work machine
CN103225632B (en) * 2012-01-27 2020-02-21 罗伯特·博世有限公司 Valve device for mobile working machine
CN103225632A (en) * 2012-01-27 2013-07-31 罗伯特·博世有限公司 Valve assembly for a mobile work machine
WO2018056036A1 (en) * 2016-09-21 2018-03-29 Smc Corporation Driving method and driving device of fluid pressure cylinder
JP2018054118A (en) * 2016-09-21 2018-04-05 Smc株式会社 Fluid pressure cylinder
KR20190050844A (en) * 2016-09-21 2019-05-13 에스엠시 가부시키가이샤 Fluid pressure cylinder
KR20190052116A (en) * 2016-09-21 2019-05-15 에스엠시 가부시키가이샤 Method and apparatus for driving a fluid pressure cylinder
CN109790859A (en) * 2016-09-21 2019-05-21 Smc 株式会社 Fluid pressure cylinder
CN109790859B (en) * 2016-09-21 2020-08-25 Smc 株式会社 Fluid pressure cylinder
US10883523B2 (en) 2016-09-21 2021-01-05 Smc Corporation Fluid pressure cylinder
US10927857B2 (en) 2016-09-21 2021-02-23 Smc Corporation Driving method and driving device of fluid pressure cylinder

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