ITTO20010648A1 - FORCE HYDRAULIC MULTIPLIER ACTUATOR. - Google Patents

FORCE HYDRAULIC MULTIPLIER ACTUATOR. Download PDF

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Publication number
ITTO20010648A1
ITTO20010648A1 IT000648A ITTO20010648A ITTO20010648A1 IT TO20010648 A1 ITTO20010648 A1 IT TO20010648A1 IT 000648 A IT000648 A IT 000648A IT TO20010648 A ITTO20010648 A IT TO20010648A IT TO20010648 A1 ITTO20010648 A1 IT TO20010648A1
Authority
IT
Italy
Prior art keywords
actuator
constant
reaction means
force
shoulder
Prior art date
Application number
IT000648A
Other languages
Italian (it)
Inventor
Roberto Fretta
Original Assignee
O M G S R L
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 O M G S R L filed Critical O M G S R L
Priority to IT000648A priority Critical patent/ITTO20010648A1/en
Publication of ITTO20010648A1 publication Critical patent/ITTO20010648A1/en
Priority to DE60106001T priority patent/DE60106001T2/en
Priority to EP01124741A priority patent/EP1273805B1/en
Priority to ES01124741T priority patent/ES2228725T3/en
Priority to AT01124741T priority patent/ATE278111T1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/088Characterised by the construction of the motor unit the motor using combined actuation, e.g. electric and fluid actuation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/032Systems 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
    • F15B11/0325Systems 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B2015/1495Characterised by the construction of the motor unit of the straight-cylinder type with screw mechanism attached to the piston
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/216Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being pneumatic-to-hydraulic converters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/70Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/76Control of force or torque of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Braking Systems And Boosters (AREA)
  • Servomotors (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

An hydraulic force-multiplying actuator is disclosed comprising adjustable pneumatic reaction means (60) adapted to exert a constant reaction pressure and to perform a constant-force stroke, and supplied by compressed-air supplying ducts (52); the actuator further comprises a shoulder (50) for the oil in the working area, and at least one element (11) adapted to prevent the pad of the reaction means (60) from rotating. <IMAGE>

Description

Descrizione dell'Invenzione Industriale avente per titolo: Description of the Industrial Invention entitled:

"Attuatore idraulico moltiplicatore di forza" "Force multiplier hydraulic actuator"

DESCRIZIONE DESCRIPTION

La presente invenzione si riferisce ad un_ attuatore idraulico moltiplicatore di forza. The present invention relates to a force multiplying hydraulic actuator.

Sono noti nella tecnica vari tipi di attuatori, sia elettromeccanici sia idraulici. Questi ultimi hanno di recente fornito una miglior soluzione dal punto di vista dell'intensificazione della forza con rapporti di moltiplica variabili in sede di dimensionamento. Un esempio di attuatore noto consente di realizzare rapporti di moltiplica variabili da almeno due e fino ad un massimo di cinque volte la reazione della vite a ricircolo. E' possibile quindi utilizzare viti in un campo costruttivo di dimensioni e carichi standard e freni di stazionamento ed azionamento dimensionati anche solo per 1/5 della forza massima esplicata. Questo tipo di attuatore intensificatore di forza elettro-idro-meccanico ha l'ulteriore vantaggio di presentarsi in una forma costruttiva non dissimile da quella di un cilindro idraulico e di potersi ad esso sostituire senza eccessive modifiche nelle strutture delle macchine esistenti. Various types of actuators, both electromechanical and hydraulic, are known in the art. The latter have recently provided a better solution from the point of view of the intensification of the force with variable gear ratios during sizing. An example of a known actuator allows to realize gear ratios varying from at least two and up to a maximum of five times the reaction of the recirculating screw. It is therefore possible to use screws in a construction range of standard dimensions and loads and parking and actuation brakes dimensioned even for only 1/5 of the maximum force exerted. This type of electro-hydro-mechanical force intensifier actuator has the further advantage of having a constructive form not dissimilar to that of a hydraulic cylinder and of being able to replace it without excessive modifications in the structures of existing machines.

Tuttavia, l'attuatore sopra descritto presenta due tipi sostanziali di problemi: innanzitutto, esso è dotato di una molla di azionamento, la quale non presenta una pressione di reazione costante, bensì un accumulo di pressione e pertanto non effettua una corsa a forza costante, e tende con il tempo a perdere le proprie funzionalità: inoltre, la sua sostituzione in caso di necessità costringe a smontare l'intero attuatore, con gli ovvi problemi di tempi e costi. In secondo luogo, tale attuatore consente di realizzare rapporti di moltiplica non superiori a cinque, che sono di applicazione ben limitata nel campo delle macchine esistenti . However, the actuator described above presents two substantial types of problems: first of all, it is equipped with an actuation spring, which does not have a constant reaction pressure, but an accumulation of pressure and therefore does not perform a stroke at constant force, and over time it tends to lose its functionality: moreover, its replacement in case of need forces the entire actuator to be disassembled, with obvious time and cost problems. Secondly, this actuator allows to realize gear ratios not exceeding five, which are of very limited application in the field of existing machines.

Scopo della presente invenzione è quello di risolvere i suddetti problemi della tecnica anteriore, fornendo un attuatore idraulico moltiplicatore di forza che non sia dotato di molla bensì di un pistone ad aria, che offre una pressione costante di reazione ed effettua una corsa costante; tale soluzione a pistone pneumatico regolabile consente inoltre di fare a meno della centralina oleodinamica che era uno dei limiti del precedente attuatore. The object of the present invention is to solve the aforesaid problems of the prior art, by providing a force-multiplying hydraulic actuator which is not equipped with a spring but with an air piston, which offers a constant reaction pressure and performs a constant stroke; this solution with adjustable pneumatic piston also makes it possible to do without the hydraulic control unit which was one of the limitations of the previous actuator.

Un ulteriore scopo della presente invenzione è quello di fornire un attuatore del tipo sopra indicato che consenta di ottenere rapporti di moltiplica fino a 25, che sono molto più consoni per le odierne applicazioni su macchine. A further object of the present invention is to provide an actuator of the type indicated above which allows to obtain gear ratios up to 25, which are much more suitable for today's applications on machines.

I suddetti ed altri scopi e vantaggi dell'invenzione, quali risulteranno dal seguito della descrizione, vengono raggiunti con un attuatore idraulico come quello descritto nella rivendicazione 1. Forme di realizzazione preferite e varianti non banali della presente invenzione formano l'oggetto delle rivendicazioni dipendenti. The above and other objects and advantages of the invention, as will emerge from the following description, are achieved with a hydraulic actuator such as that described in claim 1. Preferred embodiments and non-trivial variants of the present invention form the subject of the dependent claims.

La presente invenzione verrà meglio descritta da alcune forme preferite di realizzazione, fornite a titolo esemplificativo e non limitativo, con riferimento ai disegni allegati, nei quali l’unica Figura 1 rappresenta una vista in sezione laterale della forma di realizzazione attualmente preferita dell'attuatore moltiplicatore della presente invenzione. Come illustrato in Fig. 1, 1'attuatore idraulico della presente invenzione comprende sostanzialmente, come caratteristica fondamentale, mezzi di reazione pneumatica regolabili 60 costituiti da un pistone ad aria compressa alimentato tramite un condotto 52 e che agisce sul corpo dell'attuatore in modo da esercitare una pressione costante di reazione ed effettuare una corsa a forza costante. Tale pistone pneumatico 60 sostituisce la molla utilizzata comunemente negli attuatori noti di questo tipo. The present invention will be better described by some preferred embodiments, provided by way of non-limiting example, with reference to the attached drawings, in which the only Figure 1 represents a side sectional view of the currently preferred embodiment of the multiplier actuator of the present invention. As illustrated in Fig. 1, the hydraulic actuator of the present invention substantially comprises, as a fundamental characteristic, adjustable pneumatic reaction means 60 consisting of a compressed air piston fed through a duct 52 and which acts on the body of the actuator so as to exert a constant reaction pressure and run at constant force. This pneumatic piston 60 replaces the spring commonly used in known actuators of this type.

L'attuatore dell'invenzione è dotato inoltre di uno spallamento 50 nella zona di lavoro, il quale spallamento 50 consente un'azione dell'olio operativo (alimentato attraverso il condotto 54) in graduale aumento nella zona di lavoro in maniera da velocizzare e migliorare l'operatività dell'attuatore stesso. The actuator of the invention is also equipped with a shoulder 50 in the working area, which shoulder 50 allows an action of the operating oil (fed through the duct 54) gradually increasing in the working area in order to speed up and improve the operation of the actuator itself.

Inoltre, l'attuatore dell'invenzione può essere dotato, a differenza di quelli noti, di almeno un elemento 11 atto ad impedire la rotazione del tampone dei mezzi di reazione 60: nella pratica, tali elementi 11 sono due e sono costituiti da colonnette antirotazione. Furthermore, the actuator of the invention can be equipped, unlike the known ones, with at least one element 11 suitable for preventing the rotation of the pad of the reaction means 60: in practice, these elements 11 are two and are constituted by anti-rotation columns .

Come illustrato in dettaglio in Fig. 1, l'attuatore comprende quindi, in modo noto, normali particolari componenti che sono, in dettaglio, i seguenti: un tampone 1, uno stelo 2, una testata 3, una camicia 4, una flangia di camicia 5, un supporto tampone 6, una flangia stelo 7, una flangia moltiplicatore 8, una camicia pneumatica 9, una testata pneumatica 10, un mandrino 12, un distanziale 13, un distanziale interno 14, un distanziale inferiore 15, una capsula cuscinetto 16, una vite a ricircolo 18, un distanziale vite 19, una flangia a tampone 20, una puleggia condotta 21, un "n-pur" 22, un "nipsl 310" 23, un anello oring 4312 24, un "ptl" 25, un "t 20" 26, un "oms -mr" 27, una fascia guida 28, un anello o-ring 6820 29, un sf 30, una fascia guida 31, un "omk-e" 32, una fascia guida 22, un "omk-e" 34, un "ptl" 35, un "pu6" 36, una ghiera 37, un corteco 38, un cuscinetto obliquo 39, una chiocciola 40, una linguetta 41, un ingrassatore 42, un cuscinetto obliquo 43, una ghiera anteriore 44, una vite TCEI - ISO 4762 45, boccole alveolate 47, viti 48 ed un tappo 49. As illustrated in detail in Fig. 1, the actuator therefore comprises, in a known way, normal particular components which are, in detail, the following: a plug 1, a rod 2, a head 3, a jacket 4, a flange liner 5, a buffer support 6, a rod flange 7, a multiplier flange 8, a pneumatic liner 9, a pneumatic head 10, a mandrel 12, a spacer 13, an internal spacer 14, a lower spacer 15, a bearing capsule 16 , a recirculating screw 18, a screw spacer 19, a buffer flange 20, a driven pulley 21, an "n-pur" 22, a "nipsl 310" 23, an O-ring 4312 24, a "ptl" 25, a "t 20" 26, a "oms-mr" 27, a guide band 28, an o-ring 6820 29, a sf 30, a guide band 31, an "omk-e" 32, a guide band 22, an "omk-e" 34, a "ptl" 35, a "pu6" 36, a ring nut 37, a corteco 38, an angular bearing 39, a nut 40, a tongue 41, a grease nipple 42, an angular bearing 43, a front ring 44 , one socket head screw - ISO 4762 45, honeycomb bushings 47, screws 48 and a cap 49.

L'attuatore dell'invenzione trova la sua applicazione più efficace nel campo delle pressature, ed in particolare nel campo della formatura e del taglio di materiali, senza dover utilizzare viti e ginocchiere e consentendo di effettuare entrambe le lavorazioni in un'unica operazione . The actuator of the invention finds its most effective application in the field of pressing, and in particular in the field of forming and cutting materials, without having to use screws and knee pads and allowing both operations to be carried out in a single operation.

Claims (4)

RIVENDICAZIONI 1. Attuatore idraulico moltiplicatore di forza, caratterizzato dal fatto di comprendere mezzi di reazione pneumatici regolabili (60) atti ad esercitare una pressione costante di reazione ed effettuare una corsa a forza costante, detti mezzi di reazione (60) essendo alimentati da condotti (52) di alimentazione di aria compressa. CLAIMS 1. Hydraulic force multiplier actuator, characterized in that it comprises adjustable pneumatic reaction means (60) suitable for exerting a constant reaction pressure and carrying out a stroke at constant force, said reaction means (60) being fed by ducts (52 ) of compressed air supply. 2. Attuatore secondo la rivendicazione 1, caratterizzato dal fatto di essere dotato inoltre di uno spallamento (50) nella zona di lavoro, detto spallamento (50) consentendo un'azione dell'olio operativo in graduale aumento nella zona di lavoro. 2. Actuator according to claim 1, characterized in that it is further provided with a shoulder (50) in the work area, said shoulder (50) allowing a gradually increasing operating oil action in the work area. 3. Attuatore secondo la rivendicazione 1 o 2, caratterizzato dal fatto di essere dotato inoltre di almeno un elemento (11) atto ad impedire la rotazione del tampone dei mezzi di reazione (60). 3. Actuator according to claim 1 or 2, characterized in that it is further provided with at least one element (11) adapted to prevent rotation of the pad of the reaction means (60). 4. Attuatore secondo la rivendicazione 3, caratterizzato dal fatto che detti elementi (11) sono due e sono costituiti da colonnette antirotazione . 4. Actuator according to claim 3, characterized in that said elements (11) are two and consist of anti-rotation columns.
IT000648A 2001-07-05 2001-07-05 FORCE HYDRAULIC MULTIPLIER ACTUATOR. ITTO20010648A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IT000648A ITTO20010648A1 (en) 2001-07-05 2001-07-05 FORCE HYDRAULIC MULTIPLIER ACTUATOR.
DE60106001T DE60106001T2 (en) 2001-07-05 2001-10-17 Hydraulic pressure booster
EP01124741A EP1273805B1 (en) 2001-07-05 2001-10-17 Hydraulic force-multiplying actuator
ES01124741T ES2228725T3 (en) 2001-07-05 2001-10-17 HYDRAULIC FORCE MULTIPLIER ACTUATOR.
AT01124741T ATE278111T1 (en) 2001-07-05 2001-10-17 HYDRAULIC PRESSURE BOOSTER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000648A ITTO20010648A1 (en) 2001-07-05 2001-07-05 FORCE HYDRAULIC MULTIPLIER ACTUATOR.

Publications (1)

Publication Number Publication Date
ITTO20010648A1 true ITTO20010648A1 (en) 2001-10-05

Family

ID=11459018

Family Applications (1)

Application Number Title Priority Date Filing Date
IT000648A ITTO20010648A1 (en) 2001-07-05 2001-07-05 FORCE HYDRAULIC MULTIPLIER ACTUATOR.

Country Status (5)

Country Link
EP (1) EP1273805B1 (en)
AT (1) ATE278111T1 (en)
DE (1) DE60106001T2 (en)
ES (1) ES2228725T3 (en)
IT (1) ITTO20010648A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007116421A1 (en) * 2006-04-12 2007-10-18 O.M.G. S.R.L. Force-multiplying hydraulic actuator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1777270A1 (en) * 1965-05-28 1971-04-08 Frankfurter Maschb Ag Vorm Pok Control of the pressure medium supply to a hydraulic press unit
US4288987A (en) * 1978-11-11 1981-09-15 Eugen Rapp Pneumo-hydraulic booster with rapid-traverse feature
GB2119682B (en) * 1982-04-30 1985-07-10 Cam Gears Ltd Manually controlled power assisted press
DE4236057A1 (en) * 1992-10-26 1994-04-28 Tox Pressotechnik Gmbh Distance sensor for press. converter - has immersion piston, pneumatic controller, working piston displacement detector and electronic controller
JP2000141092A (en) * 1998-11-10 2000-05-23 Enami Seiki:Kk Press machine

Also Published As

Publication number Publication date
EP1273805A2 (en) 2003-01-08
ES2228725T3 (en) 2005-04-16
DE60106001D1 (en) 2004-11-04
DE60106001T2 (en) 2005-11-03
EP1273805B1 (en) 2004-09-29
ATE278111T1 (en) 2004-10-15
EP1273805A3 (en) 2003-04-09

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