JPS58102804A - Cylinder unit with booster and oil pressure circuit for operating the same - Google Patents

Cylinder unit with booster and oil pressure circuit for operating the same

Info

Publication number
JPS58102804A
JPS58102804A JP56200742A JP20074281A JPS58102804A JP S58102804 A JPS58102804 A JP S58102804A JP 56200742 A JP56200742 A JP 56200742A JP 20074281 A JP20074281 A JP 20074281A JP S58102804 A JPS58102804 A JP S58102804A
Authority
JP
Japan
Prior art keywords
cylinder
booster
piston
rod
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
JP56200742A
Other languages
Japanese (ja)
Inventor
Hiroshi Okada
岡田　弘志
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.)
Nippon Pneumatic Manufacturing Co Ltd
NIHON NUMBER PLATE KK
Original Assignee
Nippon Pneumatic Manufacturing Co Ltd
NIHON NUMBER PLATE KK
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 Nippon Pneumatic Manufacturing Co Ltd, NIHON NUMBER PLATE KK filed Critical Nippon Pneumatic Manufacturing Co Ltd
Priority to JP56200742A priority Critical patent/JPS58102804A/en
Publication of JPS58102804A publication Critical patent/JPS58102804A/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
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/032—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters
    • F15B11/0325—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters the fluid-pressure converter increasing the working force after an approach stroke
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/214—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
    • 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
    • F15B2211/32—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
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/325—Directional control characterised by the type of actuation mechanically actuated by an output member of the circuit
    • F15B2211/326—Directional control characterised by the type of actuation mechanically actuated by an output member of the circuit with follow-up action
    • 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
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • 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
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source 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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5158—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and an 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Abstract

PURPOSE:To obtain smooth operations of booster and rods by a method wherein a piston chamber in a main cylinder is communicated with the external in a state in which a piston mounted slidably on a booster cylinder is moved to the left end position. CONSTITUTION:When a booster changeover valve 36 i switched by the changeover of limit valves 22 and 25, a piston 16 and a rod move reciprocatively in the leftward and rightward direction so that a piston 12 and a rod 11 are moved by a high pressure. In order to contract the rod 11, a main changeover valve 34 is changed over to connect a pump 30 to an oil passage (b) and a tank 31 to an oil passage (a) respectively. At this time a left chamber in the booster cylinder 9b is led to the tank 31 and a right chamber is led with a starting pressure to move the piston 16 and rod 15 to the left end position, so that a hole 20 opens to a port 21 so as to connect the left chamber of a main cylinder 9a to the tank 31.

Description

【発明の詳細な説明】 本発明はブースター付シリンダーユニット及び該ブース
ター付シリンダーユニットを作動させる油圧回路に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylinder unit with a booster and a hydraulic circuit for operating the cylinder unit with a booster.

本発明は全油圧式のブースター付シリンダーユニット及
びこれを作動させる油圧回路の提供を目的とする。An object of the present invention is to provide a fully hydraulic cylinder unit with a booster and a hydraulic circuit for operating the cylinder unit.

例えば第１図に示す様なパワーショベルのアームに取付
けてコンクリート等を押し潰す圧砕機（１）においては
爪（３）に大きな力を与えるために高出力が必要とされ
るだけでなく、機動性及び作動性の点で小型の油圧シリ
ンダー（４）が要求される。For example, a crusher (1) that is attached to the arm of a power shovel to crush concrete, etc., as shown in Figure 1, not only requires high output in order to apply a large force to the claws (3), but also requires maneuverability. A small hydraulic cylinder (4) is required in terms of performance and operability.

本発明のブースター付シリンダーユニットは以上の要求
を満足させるものである。The cylinder unit with booster of the present invention satisfies the above requirements.

本発明のブースター付シリンダーユニット及びこれを作
動させる油圧回路（以下本発明のシリンダーユニット及
び本発明の油圧回路という）を図面に示す実施例に従い
以下各々につい、て説明する。EMBODIMENT OF THE INVENTION The cylinder unit with a booster of this invention and the hydraulic circuit which operates this (hereinafter referred to as the cylinder unit of this invention and the hydraulic circuit of this invention) are each demonstrated below according to the Example shown in drawing.

第２図は本発明のシリンダーユニット及びこれを作動さ
せ巻本発明の油圧回路を示す。FIG. 2 shows the cylinder unit of the present invention and the hydraulic circuit for operating the cylinder unit of the present invention.

一本体（９）を有し、該シリンダ一本体（９）は主シリ
ンダ−（９ａ）　ドブ−スターシリンダー（９ｂ）とを
有する。The cylinder body (9) has a main cylinder (9a) and a booster cylinder (9b).

主シリンダ−（９ａ）にはロッド（１１）及びピストン
ｕ４が摺動可能に取付けられる。A rod (11) and a piston u4 are slidably attached to the main cylinder (9a).

主シリンダ−（９ａ）内の左右の部屋（右室がロッド（
均側）は各々接続口Ａ％Ｂに接続される。The left and right chambers in the main cylinder (9a) (the right chamber is the rod (
(uniform side) are each connected to connection port A%B.

次にブースターシリンダー（９ｂ）にはロッドＱｅ及び
ピストンＱＱが摺動可能に取付けられる。Next, a rod Qe and a piston QQ are slidably attached to the booster cylinder (9b).

ロッドＱ篩の先端は主シリンダ−（９ａ）内の左室に突
出している。（ピストンＱ々の左回に凹所ｌが設けられ
ているがロッドＱ篩の先端位置との関係で省略可能）。The tip of the rod Q sieve projects into the left ventricle within the main cylinder (9a). (Although recesses l are provided in the left turns of the pistons Q, they can be omitted in relation to the position of the tip of the rod Q sieve).

ブースターシリンダー（９ｂ）内の左右の部屋（右室が
ロッド（１ｅ側）は各々接続口Ｃ，Ｄに接続される。The left and right chambers (the right chamber is the rod (1e side)) in the booster cylinder (9b) are connected to connection ports C and D, respectively.

次にロッド００の先端面に凹所０枠が設けられ、該凹所
（至）は穴翰によりロッド（至）の側面に開口する。Next, a recess 0 frame is provided on the tip end surface of the rod 00, and the recess (end) is opened on the side surface of the rod (end) by a hole.

穴曽はピストン０・が左端に移動した状態でシリンダ一
本体（９）に設けられ接続口Ｅに接続されたボートＱυ
に開口する様位置決めされる。Anaso is a boat Qυ installed in the cylinder body (9) and connected to the connection port E with the piston 0 moved to the left end.
It is positioned so that it opens at

次にブースターシリンダー（９ｂ）の両端にはリミツト
弁（２）（ハ）が、ロッド（至）鋤をブースターシリン
ダー　（ｓｂ）内の左右の部屋に突出して設けられる。Next, limit valves (2) (c) are provided at both ends of the booster cylinder (9b), with rods protruding into the left and right chambers within the booster cylinder (sb).

リミツト弁＠（ハ）は各々連通位置と遮断位置とを有し
、自由状態ではばね（ホ）（２）により遮断位置にされ
る。Each of the limit valves @(c) has a communicating position and a blocking position, and is set in the blocking position by a spring (e)(2) in a free state.

すなわちリミット弁翰（至）はピストンＱ・が左端に移
動又は右端に移動した状態でロッドＣ１４ｍによりばね
（２）（ホ）に抗して切換えられ連通位置にされる（第
２図ではリミツト弁（イ）が切換えられている）。In other words, the limit valve (to) is switched to the communicating position by the rod C14m against the spring (2) (e) with the piston Q moved to the left end or right end (in Fig. 2, the limit valve (b) has been switched).

リミツト弁（２）は接続口Ｆ、Ｇに、リミツト弁（２）
は接続口Ｈ，Ｉに各々接続される。Limit valve (2) is connected to connection ports F and G.
are connected to connection ports H and I, respectively.

次に本発明の油圧回路であるが、該油圧回路はポンプ（
至）（ポンプ（至）による元圧はリリーフ弁（２）で調
整される）、タンク０η及び前述のシリンダーユニット
（７）を有する。Next, regarding the hydraulic circuit of the present invention, the hydraulic circuit consists of a pump (
to) (the source pressure by the pump (to) is adjusted by a relief valve (2)), a tank 0η, and the above-mentioned cylinder unit (7).

更に油圧回路は主切換弁（財）を有し、該主切換弁（至
）はポンプ（至）及びタンクｅｌｌ）を選択的に油路ａ
、　ｂに接続する。Furthermore, the hydraulic circuit has a main switching valve, which selectively connects the pump and the tank to the oil passage a.
, connect to b.

油路ａ、ｂはばね（至）及びパイロットスプール（ロ）
を有するブースター切換弁（至）により油路ｃ、ｄに選
択的に接続される。Oil passages a and b are the spring (to) and pilot spool (b)
It is selectively connected to oil passages c and d by a booster switching valve (to) having a booster switching valve (to).

油路Ｃは並列に設けられたンーケンス弁（ト）及び逆止
弁＠４（逆方向）を介して７リンダーユニツト（７）の
接続口Ｃに接続される。The oil passage C is connected to the connection port C of the 7-linder unit (7) via a sequence valve (T) and a check valve @4 (reverse direction) provided in parallel.

一方油路ｄはシリンダーユニット（７）の接続口りに接
続される。On the other hand, the oil passage d is connected to the connection port of the cylinder unit (7).

次に油路ａは逆止弁−（順方向）を介してシリンダーユ
ニット（７）の接続口Ａに、及び直接に接続口Ｅに接続
される。The oil passage a is then connected to the connection port A of the cylinder unit (7) via a check valve (forward direction) and directly to the connection port E.

次に油路すであるが、これは分枝してシリンダーユニッ
ト（７）の接続口Ｂに接続される。Next is the oil passage, which is branched and connected to the connection port B of the cylinder unit (7).

以上は主シリンダ−（９ａ）及びブースターシリンダー
（９ｂ）の直接の駆動用の回路部分であり、ブースター
切換弁（至）のパイロットスプール（ロ）を切換えてブ
ースターシリンダー（９ｂ）を往復駆動させる回路部分
を次に説明する。The above is the circuit part for directly driving the main cylinder (9a) and the booster cylinder (9b), and the circuit that drives the booster cylinder (9b) reciprocatingly by switching the pilot spool (b) of the booster switching valve (to). The parts will be explained next.

すなわちパイロットスプール（至）の一端（他端はばね
（２）で押されている）は接続口Ｉに接続される。That is, one end of the pilot spool (the other end is pressed by a spring (2)) is connected to the connection port I.

接続口■にリミツト弁（至）を介して接続された接続口
Ｈは前記油路ａに接続される。A connection port H connected to the connection port (2) via a limit valve (to) is connected to the oil passage a.

パイロットスプール（ロ）と接続ロエとを接続する油路
は途中に分枝路を有し、該分枝路は接続口Ｆに接続され
る。The oil passage connecting the pilot spool (b) and the connection loe has a branch passage in the middle, and the branch passage is connected to the connection port F.

接続口Ｆにリミット弁四を介して接続された接続口Ｇは
逆上弁に）（順方向）を介して油路すに、及び逆止弁−
（順方向）を介して油路ａに接続される。The connection port G connected to the connection port F via the limit valve 4 is connected to the oil passage through the reverse valve (in the forward direction) and the check valve -
(forward direction) to the oil passage a.

次にパイロットスプール（ロ）の一端は逆止弁的（順方
向）を介して油路ａにも接続されている。Next, one end of the pilot spool (b) is also connected to the oil passage a via a check valve (forward direction).

以上に構成を示した本発明のシリンダーユニット及び本
発明の油圧回路の作用を同時に説明する。The operation of the cylinder unit of the present invention and the hydraulic circuit of the present invention having the configurations shown above will be explained at the same time.

ここで第２図を初期状態とし、従ってピストンａ邊ａ＊
、ブースター切換弁（至）、主切換弁■等の作動はこの
状態から説明することにする。Here, Fig. 2 is assumed to be the initial state, and therefore piston a side a*
The operations of , booster switching valve (to), main switching valve (2), etc. will be explained starting from this state.

まず主切換弁（ロ）を第２図に示す遮断位置から切換え
て、ポンプ…を油路ａに、及びタンク０乃を油路すに各
々接続する。First, the main switching valve (b) is switched from the shutoff position shown in FIG. 2, and the pumps are connected to the oil passage a, and the tanks 0 to 1 are connected to the oil passage A.

従ってポンプ…による元圧は油路ａを通り逆止弁に）（
順方向）を介して接続口Ａから主シリンダ−（９ａ）の
左室に導かれる。Therefore, the source pressure from the pump passes through oil path a to the check valve) (
forward direction) from the connection port A to the left ventricle of the main cylinder (9a).

更に元圧は接続口Ｆ１ポートＱυ及び穴翰を介して凹所
Ｍからもシリンダー（９ａ）の左室に導かれる。Furthermore, the source pressure is also led from the recess M to the left chamber of the cylinder (9a) via the connection port F1 port Qυ and the hole.

これによりピストン０埠及びロッド０υは（第２図）右
方に移動し、例えば第１図に示した爪（３）を動かす。As a result, the piston 0 and the rod 0υ move to the right (FIG. 2), for example, moving the pawl (3) shown in FIG.

ロッド０ηの移動に伴っである位置で荷重により大きな
反力が発生した場合には、油路Ｃの圧力（油路Ｃはブー
スター切換弁（至）を介して油路ａに接続され従って元
圧）が上昇する。If a large reaction force is generated due to the load at a certain position as the rod 0η moves, the pressure in oil passage C (oil passage C is connected to oil passage a via the booster switching valve (to), and therefore the source pressure ) increases.

これによりシーケンス弁に）が第２図の遮断位置から連
通位置に切換えられる（この時の圧力は予め設定される
）。As a result, the sequence valve) is switched from the blocking position shown in FIG. 2 to the communicating position (the pressure at this time is set in advance).

これにより油路Ｃからシーケンス弁に）及び接続口Ｃを
介してブースターシリンダー（９ｂ）内の左室に元圧が
導かれる。As a result, the original pressure is introduced from the oil passage C to the sequence valve) and through the connection port C to the left chamber in the booster cylinder (9b).

これにより第３図に示す様にピストン０１が右方に移動
し、ロッドａθが主シリンダ−（９ａ）内の左室に突出
して行゛く。As a result, the piston 01 moves to the right as shown in FIG. 3, and the rod a.theta. projects into the left chamber in the main cylinder (9a).

すなわちピストンθ呻の左側受圧面積とロッドＯ５の断
面積との比率に従い、ロッドｏ５により主シリンダ−（
９ａ）内の左室の油は圧縮されて圧力が上昇する。In other words, according to the ratio of the left pressure receiving area of the piston θ and the cross-sectional area of the rod O5, the main cylinder (
The oil in the left ventricle in 9a) is compressed and the pressure increases.

この様に主シリンダ−（９ａ）内の左室の油の圧縮が可
能になるのは、ロッドＱｏの右方への移動により穴翰が
ボートｅυから離れると共に逆止弁（６）により左室の
油はロックされた状態になっているからである。In this way, the oil in the left ventricle in the main cylinder (9a) can be compressed because the rod Qo moves to the right and the hole is separated from the boat eυ, and the check valve (6) opens the left ventricle. This is because the oil is in a locked state.

従って主シリンダ−（９ａ）内の左室の油の圧力上昇に
より、ピストンａ４及びロッド０ηは大きな力で右方に
移動する（移動速度は遅い）。Therefore, due to the increase in oil pressure in the left chamber of the main cylinder (9a), the piston a4 and the rod 0η move to the right with a large force (the moving speed is slow).

この様にピストンα０及びロッドＱｆ９が右方に移動す
ることにより、ピストンＨの右面がリミツト弁（ハ）の
ロッド（財）に接触しこれをばね（ホ）Ｋ抗して押込め
る。As the piston α0 and the rod Qf9 move to the right in this manner, the right side of the piston H comes into contact with the rod of the limit valve (C) and is pushed in against the spring (E) K.

これによりリミツト弁（ハ）は遮断位置から第４図に示
す様に連通位置に切換えられる。As a result, the limit valve (c) is switched from the blocking position to the communicating position as shown in FIG.

これにより元圧が油路ａから接続ロＨ％！Ｊミツト弁（
２）及び接続口Ｉを介してパイロットスプール（ロ）の
右端に導かれる。As a result, the source pressure is H% from oil path a to connection ro! J Mitutoben (
2) and is led to the right end of the pilot spool (b) through the connection port I.

この結果ブースター切換弁（至）が切換えられて油路ａ
が油路ｄに、油路すが油路Ｃに各々接続される０ ここでパイロットスプールりの右端は逆止４Ｆ（４３に
接続されているが、逆止弁的の他端は元圧が導かれた油
路ａに接続されているためブースター切換弁σｂの切換
えに影響を与えない。As a result, the booster switching valve (to) is switched and the oil passage a
is connected to oil path d, and the oil path is connected to oil path C. Here, the right end of the pilot spool is connected to check 4F (43), but the other end of the check valve is connected to the source pressure. Since it is connected to the guided oil path a, it does not affect the switching of the booster switching valve σb.

ブースター切換弁（ロ）が切換えられることにより、元
圧が油路ａ１油路ｄ及び接続口りを介してブースターシ
リンダー（９ｂ）内の右室に導かれてピストンａＱ及び
ロッド（ｌが左方に移動を始める。By switching the booster switching valve (b), the source pressure is guided to the right chamber in the booster cylinder (9b) via oil passages a1, oil passage d, and the connection port, and the piston aQ and rod (l is on the left) are guided to the right chamber in the booster cylinder (9b). Start moving to.

この際主シ１）ンダー（９ａ）内の左室には接続口Ａ及
び逆止弁（６）を介して油路ａから油が補充される。At this time, the left chamber in the main cylinder 1) (9a) is replenished with oil from the oil passage a via the connection port A and the check valve (6).

ピストンＯＱが左方に移動することによりピストンＯＱ
の右面がリミツト弁（ハ）のロッド■から離れ、ばね（
ホ）によりリミツト弁（ハ）が連通位置から第５図に示
す様に遮断位置に切換えられる。By moving the piston OQ to the left, the piston OQ
The right side of is separated from the rod ■ of the limit valve (c), and the spring (
The limit valve (c) is switched from the communicating position to the blocking position as shown in FIG. 5 by (e).

これによりパイロットスプール（ロ）の右端は油路ａか
ら速断されるが、パイロットスプール（ロ）の右端とリ
ミツト弁（ハ）とを接続する油路は密閉（リミツト弁＠
も遮断位置）されているため、ブースター切換弁（至）
は切換えられずその状態が保たれる。As a result, the right end of the pilot spool (b) is quickly disconnected from oil path a, but the oil path connecting the right end of the pilot spool (b) and the limit valve (c) is sealed (limit valve @
Since the booster switching valve (to) is also in the shutoff position,
is not switched and remains in that state.

ピストンＯＱの左方への移動によりピストンα呻の左面
がリミツト弁（イ）のロッド（財）に接触し、これをば
ね＠に抗して押込めＩＪ　ミツト弁翰を遮断位置から連
通位置へと切換える。As the piston OQ moves to the left, the left side of the piston α contacts the rod of the limit valve (A), which is pushed in against the spring @ to move the IJ valve handle from the blocking position to the communicating position. Switch to

これによりパイロットスプール翰の右端とリミツト弁（
２）（従ってリミツト弁（ハ））とを接続する油路は、
接続口Ｆ、リミツト弁（イ）、接続口Ｇ及び逆上弁に）
を介して油路すに接続される。This will connect the right end of the pilot spool head and the limit valve (
2) (Therefore, the oil line connecting the limit valve (c)) is
connection port F, limit valve (a), connection port G, and reverse valve)
Connected to the oil line via.

これによりパイロットスプール（ロ）の右端の圧力が低
下してばね（至）によりブースター切換弁（至）が切換
えられる。As a result, the pressure at the right end of the pilot spool (b) decreases, and the booster switching valve (to) is switched by the spring (to).

これにより元圧が油路ａから油路Ｃ１シーケンス弁−及
び接続口Ｃを介してブースターシリンダー　（９ｂ）内
の左室に導かれ、ピストンａＱ及びロットθ篩は再び右
方に移動する。As a result, the source pressure is guided from the oil passage a to the left chamber in the booster cylinder (9b) via the oil passage C1 sequence valve and the connection port C, and the piston aQ and the lot θ sieve move to the right again.

これにより主シリンダ−（９ａ）内の左室の圧力が上昇
しピストンａ擾及びロッド０１）は第３図について説明
したと同様大きな力で右方に移動する。As a result, the pressure in the left chamber in the main cylinder (9a) increases, and the piston a and the rod 01) move to the right with a large force similar to that described with reference to FIG.

以上の結果リミツト弁＠（ハ）の切換えに従ってブース
ター切換弁（７）が切換えられ、ピストンＯＱ及びロッ
ドａυが左右に往復動しピストンリカ及びロッド０υを
高圧で右方に移動させることになる。As a result of the above, the booster switching valve (7) is switched in accordance with the switching of the limit valve @(c), and the piston OQ and rod aυ reciprocate from side to side to move the piston Rika and rod 0υ to the right under high pressure.

次に使用後ロッド（Ｉυを収縮させるには主切換弁（ロ
）を切換えてポンプ（７）を油路すに、タンク６υを油
路ａに各々接続する。Next, to deflate the rod (Iυ) after use, switch the main switching valve (b) to connect the pump (7) to the oil path and connect the tank 6υ to the oil path a, respectively.

これによりパイロットスプール（９）の右端は逆止弁（
財）を介して油路ａに接続されて圧力が低下する参 （圧力が既に低下している場合もあるがこの場合は問題
ない。） これによりブースター切換弁伽ははね（至）により第２
図に示した切換位置となる。As a result, the right end of the pilot spool (9) is connected to the check valve (
(The pressure may have already decreased, but there is no problem in this case.) As a result, the booster switching valve is connected to oil line a via the 2
The switching position shown in the figure is reached.

すなわちブースターシリンダー（９ｂ）内の左室は逆上
弁（財）、油路Ｃ及びブースター切換弁（至）を介して
油路ａからタンク０１）に接続される。That is, the left chamber in the booster cylinder (9b) is connected from the oil passage a to the tank 01) via the reverse valve, the oil passage C, and the booster switching valve (to).

一方ブースターシリンダー（９ｂ）内の右室は接続口Ｄ
、油路ｄ及びブースター切換弁（至）を介して油路すか
らポンプ（１）に接続されているため元圧が導かれる。On the other hand, the right chamber in the booster cylinder (9b) is connected to the connection port D.
, the oil path d and the booster switching valve (to) are connected to the pump (1), so the source pressure is introduced.

これによりピストンＱｔ９及びロッドａＧが左端まで移
動し、第２図に示す様に穴■がボートＱυに開口する。As a result, the piston Qt9 and the rod aG move to the left end, and the hole 2 opens into the boat Qυ as shown in FIG.

これにより主シリンダ−（９ａ）内の左室は凹所（至）
、穴翰、ボートＱυ及び接続口Ｅを介して油路ａがらタ
ンク６υに接続される。This causes the left ventricle in the main cylinder (9a) to reach a concave position.
, the oil passage a is connected to the tank 6υ through the hole, the boat Qυ, and the connection port E.

一方主シリンダー（９ａ）内の右室は接続口Ｂを介して
油路すからポンプ（至）に接続されているため元圧が導
かれる。On the other hand, the right chamber in the main cylinder (9a) is connected to the pump (from the oil passage) through the connection port B, so that the original pressure is introduced thereto.

これによりピストン（２）及びロッドａηが収縮（左方
に移動）を開始し、最終的に第２図に示す初期状態に戻
ることになる。As a result, the piston (2) and the rod aη begin to contract (move to the left) and eventually return to the initial state shown in FIG. 2.

本発明のシリンダーユニットは以上に説明した本発明の
油圧回路によってのみ作動されるものではない。The cylinder unit of the present invention is not operated solely by the hydraulic circuit of the present invention described above.

例えばピストン（２）及びロッドａυを駆動する油圧回
路とピスト７０時及びロッドａＯを往復動させる油圧回
路とを独立して構成（各々の回路は種々前えらね、る）
すれば本発明のシリンダーユニットを容易に作動させる
ことが出来る。For example, the hydraulic circuit that drives the piston (2) and the rod aυ and the hydraulic circuit that reciprocates the piston 70 and the rod aO are configured independently (each circuit has a variety of options).
Then, the cylinder unit of the present invention can be easily operated.

本発明のシリンダーユニット及び本発明の油圧回路は以
上の構成、作用において次の効果を有する。The cylinder unit of the present invention and the hydraulic circuit of the present invention have the following effects in the above configuration and operation.

まず本発明のシリンダーユニットについて、（１・１）
本発明のブースター付シリンダーユニットは主シリンダ
−（９ａ）及びブースターシリンダー（９ｂ）を有する
シリンダ一本体（９）と、主シリンダ−（９ａ）に摺動
可能に取付けられたピストンα埠及びロッド０υと、ブ
ースターシリンダー（９ｂ）に摺動可能に取付けられた
ピストンαＱと、該ピストンａＱに固定され先端面に凹
所（ト）を有すると共に先端が主シリンダ−（９ａ）内
の左室（ロッドＱｌ）側と反対の部屋）に突出するロッ
ドＱｆ９と、ピストンＯ呻が左端に移動した状態で凹所
ａ枠の穴（ホ）と連通するシリンダ一本体（９）内のボ
ートａ１）と、ブースターシリンダー（９ｂ）の左端に
設けられ自由状態ではばねυにより遮断されピストンα
Ｑにより連通位置に切換えられるリミツト弁（財）と、
ブースターシリンダー（９ｂ）の右端に設けら−れ、自
由状態ではばね（ホ）により遮断されピストン０りによ
り連通位置に切換えられるリミツト弁（ハ）とから構成
され、特にブースターシリンダー　（９ｂ）のピストン
ｌＪ→の往復動はリミツト弁＠（ハ）により検出される
ため全油圧式の回路により作動させることが出来る。First, regarding the cylinder unit of the present invention (1.1)
The cylinder unit with booster of the present invention includes a cylinder main body (9) having a main cylinder (9a) and a booster cylinder (9b), a piston α and a rod 0υ which are slidably attached to the main cylinder (9a). , a piston αQ that is slidably attached to the booster cylinder (9b), and a piston αQ that is fixed to the piston aQ and has a recess (G) on its tip surface, and whose tip is connected to the left chamber (rod) in the main cylinder (9a). A rod Qf9 protrudes into the room opposite to the Ql) side, and a boat a1) in the cylinder body (9) that communicates with the hole (E) in the recess A frame with the piston O moved to the left end. It is installed at the left end of the booster cylinder (9b) and in the free state is blocked by the spring υ and the piston α
a limit valve that is switched to a communicating position by Q;
It consists of a limit valve (C) installed at the right end of the booster cylinder (9b), which is shut off by a spring (E) in the free state and switched to the communicating position when the piston is zero. Since the reciprocating motion of lJ→ is detected by the limit valve @(c), it can be operated by a fully hydraulic circuit.

（］・２）本発明のブースター付シリンダーユニットは
同上の構成であり、特にピストンａすが左端に移動した
状態で主シリンダ−（９ａ）内の左室を外部に連通し、
右方に移動した状態で遮断するポートなυ、ロンドａθ
先端面の凹所（至）及び穴（イ）が設けられるためブー
スターの作動及びロッドａ′Ｄの作動は円滑に行われる
。(]・2) The cylinder unit with a booster of the present invention has the same configuration as above, and in particular, with the piston a moved to the left end, the left chamber in the main cylinder (9a) is communicated with the outside,
Port υ, Rondo aθ, which is shut off when moved to the right
Since the recess (to) and the hole (a) are provided in the tip surface, the operation of the booster and the rod a'D are performed smoothly.

次に本発明の油圧回路について、 （２・１）本発明の油圧回路は同上のブースター付シリ
ンダーユニットと、主シリンダ−（９ａ）の駆動用の回
路部分と、ブースター切換弁（至）によるブースターシ
リンダー（ｆｋ））の往復駆動用の回路部分とから構成
さｔ７るため同上のブースター付シリンダーユニットを
全油圧式で作動させることが可能となる。Next, regarding the hydraulic circuit of the present invention, (2.1) The hydraulic circuit of the present invention includes a cylinder unit with a booster as described above, a circuit portion for driving the main cylinder (9a), and a booster switching valve (to). Since the cylinder unit (fk) is composed of a circuit section for reciprocating the cylinder (fk), it is possible to operate the booster-equipped cylinder unit as described above completely hydraulically.

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

第１図は本発明のシリンダーユニットの使用に適する用
途としての圧砕機の概念図 第２図は本発明のシリンダーユニットを本発明の回路図
と共に示す概略図 第３図乃至第５図は同上シリンダーユニットの作動状態
図 １：圧砕機　　　　　２：本体 ３：爪　　　　　　　４：油圧シリンダー５；軸　　　
　　　　６：ロッド ７：シリンダーユニット ８：ビン　　　　　　９ニジリンダ一本体９ａ：主シリ
ンダ−９ｂニブ−スターシリンダー１１：ロッド　　　
　　１２：ピスト／１３：凹所　　　　　　１５：ロッ
ド １６：ピストン　　　　１８；凹所 ２０：穴　　　　　　　２１：ポート ２２：リミツト弁　　　２３：ばね ２４：ロッド　　　　　２５：リミット弁２６：ばね　
　　　　　２７：ロツド ３０：ポンプ　　　　　３１：タンク ３２：リリーフ弁′３４：主切換弁 ３６：７’−１’−切換弁３７：パイロン）　スフ”　
−ル３８：ばね　　　　　　４ｏニジ−ケンス弁４２乃
至４６：逆正弁　　ＥＬｓ　ｂｓ　Ｃ％ｄ：油路Ａ乃至
■：接続口 出願人　　日本ニューマチック工業株式会社代理人　橋
爪英彌 −１［FIG. 1 is a conceptual diagram of a crusher as an application suitable for use of the cylinder unit of the present invention. FIG. 2 is a schematic diagram showing the cylinder unit of the present invention together with a circuit diagram of the present invention. Unit operating state diagram 1: Crusher 2: Main body 3: Claw 4: Hydraulic cylinder 5; Shaft
6: Rod 7: Cylinder unit 8: Bin 9 Niji cylinder - Main body 9a: Main cylinder - 9b Nib - Star cylinder 11: Rod
12: Piston / 13: Recess 15: Rod 16: Piston 18; Recess 20: Hole 21: Port 22: Limit valve 23: Spring 24: Rod 25: Limit valve 26: Spring
27: Rod 30: Pump 31: Tank 32: Relief valve '34: Main switching valve 36: 7'-1'-Switching valve 37: Pylon)
- Rule 38: Spring 4o Nisikens valve 42 to 46: Reverse valve ELs bs C%d: Oil line A to ■: Connection port applicant Nippon Pneumatic Industry Co., Ltd. agent Hideya Hashizume-1 [

Claims (1)

【特許請求の範囲】[Claims] 】、主ンリンダ−（９ａ）及びブースターシリンダー（
９ｂ）を有するシリンダ一本体（９）と、主シリンダ−
（９ａ）に摺動可能に取付けられたピストン＠及びロッ
ド０１）と、ブースターシリンダー（９ｂ）に摺動可能
に取付けられたピストンＱｌｌＧと、該ピストンａ・に
固定され先端面に凹所（ト）を有すると共に先端が主シ
リンダ−（９ａ）内の左室（ロッド０η側と反対の部屋
）に突出するロッドＯＤと、ピストンＯ→が左端に移動
した状態で凹所（至）の穴四と連通ずるシリンダ一本体
（９）内のポートＱＤと、ブースターシリンダー（９ｂ
）の左端に設けられ自由状態ではばね（ホ）により遮断
されピストン０Ｑにより連通位置に切換えられるリミツ
ト弁（２）と、ブースターシリンダー（９ｂ）の右端に
設けられ自由状態ではばね（ホ）により遮断されピスト
ンＯＱにより連通位置に切換えられるリミツト弁（ハ）
とからなるブースター付シリンダーユニット２、主シリ
ンダ−（９ａ）及びブースターシリンダー（９ｂ）を有
するシリンダ一本体（９）、主シリンダ−（９ａ）に摺
動可能に取付けられたピストン０′４及びロッドａＬブ
ースターシリンダー（９ｂ）に摺動可能に取付けられた
ピストン叫、該ピストン四に固定され先端面に凹所０榎
を有すると共に先端が主シリンダ−（９ａ）内の左室（
ロッド０η側と反対の部屋）に突出するロッドＱＱ１　
ピストンＯｆ９が左端に移動した状態で凹所（至）の穴
翰と連通ずるシリンダ一本体（９）内のポート■ｌ）、
ブースターシリンダー（９ｂ）の左端に設けられ自由状
態でほぼね翰により遮断されピストンＱ・により連通位
置に切換えられるリミツト弁（２）、及びブースターシ
リンダー（９ａ）の右端に設けられ自由状態ではばね（
至）によ４遮断されピストン叫により連通位置に切換え
られるリミツト弁（ハ）からなるブースター付シリンダ
ーユニットト、主シリンダ−（９ａ）の駆動用の回路部
分と、ブースター切換弁（至）によるブースターシリン
ダー（９ｂ）の往復駆動用の回路一部分とからなる油圧
回路], main cylinder (9a) and booster cylinder (
a cylinder body (9) having a main cylinder (9b);
A piston @ and rod 01) are slidably attached to the booster cylinder (9a), a piston QllG is slidably attached to the booster cylinder (9b), and a recess (trough) is fixed to the piston a and the tip surface. ) and whose tip protrudes into the left chamber (chamber opposite to the rod 0η side) in the main cylinder (9a), and with the piston O → moved to the left end, the rod OD has a hole 4 in the recess (to). The port QD in the cylinder body (9) that communicates with the booster cylinder (9b
) is provided at the left end of the booster cylinder (9b) and is shut off by a spring (E) in the free state and switched to the communicating position by the piston 0Q, and a limit valve (2) is provided at the right end of the booster cylinder (9b) and is shut off by the spring (E) in the free state. Limit valve (c) that is switched to the communicating position by the piston OQ
A cylinder unit 2 with a booster, a cylinder body (9) having a main cylinder (9a) and a booster cylinder (9b), a piston 0'4 and a rod slidably attached to the main cylinder (9a). A piston is slidably attached to the L booster cylinder (9b), is fixed to the piston, has a recess on its tip surface, and has its tip attached to the left chamber (9a) in the main cylinder (9a).
Rod QQ1 protruding into the room opposite to the rod 0η side
A port ■l) in the cylinder body (9) that communicates with the hole in the recess (to) when the piston Of9 has moved to the left end;
A limit valve (2) is provided at the left end of the booster cylinder (9b) and is almost blocked by the spring in the free state and is switched to the communicating position by the piston Q, and a limit valve (2) is provided at the right end of the booster cylinder (9a) and is blocked by the spring (2) in the free state.
A cylinder unit with a booster consisting of a limit valve (c) which is shut off by (to) and switched to a communicating position by the piston scream, a circuit part for driving the main cylinder (9a), and a booster by a booster switching valve (to). Hydraulic circuit consisting of a part of the circuit for reciprocating the cylinder (9b)
JP56200742A 1981-12-11 1981-12-11 Cylinder unit with booster and oil pressure circuit for operating the same Pending JPS58102804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56200742A JPS58102804A (en) 1981-12-11 1981-12-11 Cylinder unit with booster and oil pressure circuit for operating the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56200742A JPS58102804A (en) 1981-12-11 1981-12-11 Cylinder unit with booster and oil pressure circuit for operating the same

Publications (1)

Publication Number Publication Date
JPS58102804A true JPS58102804A (en) 1983-06-18

Family

ID=16429410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56200742A Pending JPS58102804A (en) 1981-12-11 1981-12-11 Cylinder unit with booster and oil pressure circuit for operating the same

Country Status (1)

Country Link
JP (1) JPS58102804A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367143A2 (en) * 1988-10-31 1990-05-09 Toshiba Kikai Kabushiki Kaisha Clamping cylinder system
WO2006125877A1 (en) * 2005-05-25 2006-11-30 Ateliers De Constructions Du Beaujolais Device for supplying oil to a tool mounted on a support device and hydraulic connection assembly
CN108679005A (en) * 2018-04-23 2018-10-19 中国矿业大学 A kind of multistage Multipurpose hydraulic booster that pressure ratio is variable
WO2022209969A1 (en) * 2021-03-31 2022-10-06 イーグル工業株式会社 Fluid circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367143A2 (en) * 1988-10-31 1990-05-09 Toshiba Kikai Kabushiki Kaisha Clamping cylinder system
WO2006125877A1 (en) * 2005-05-25 2006-11-30 Ateliers De Constructions Du Beaujolais Device for supplying oil to a tool mounted on a support device and hydraulic connection assembly
FR2886372A1 (en) * 2005-05-25 2006-12-01 Const Du Beaujolais Sa Atel DEVICE FOR REALIZING THE OIL SUPPLY OF A TOOL MOUNTED ON A CARRIER AND HYDRAULIC CONNECTION ASSEMBLY
CN108679005A (en) * 2018-04-23 2018-10-19 中国矿业大学 A kind of multistage Multipurpose hydraulic booster that pressure ratio is variable
CN108679005B (en) * 2018-04-23 2019-08-27 中国矿业大学 A kind of multistage Multipurpose hydraulic booster that pressure ratio is variable
WO2019205471A1 (en) * 2018-04-23 2019-10-31 中国矿业大学 Multi-stage multipurpose hydraulic pressurizer with variable pressurization rate
WO2022209969A1 (en) * 2021-03-31 2022-10-06 イーグル工業株式会社 Fluid circuit

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