EP0077837A1 - Unite de cylindre double - Google Patents

Unite de cylindre double Download PDF

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Publication number
EP0077837A1
EP0077837A1 EP82901367A EP82901367A EP0077837A1 EP 0077837 A1 EP0077837 A1 EP 0077837A1 EP 82901367 A EP82901367 A EP 82901367A EP 82901367 A EP82901367 A EP 82901367A EP 0077837 A1 EP0077837 A1 EP 0077837A1
Authority
EP
European Patent Office
Prior art keywords
pressure
receiving surface
rod
piston
fluid pressure
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.)
Withdrawn
Application number
EP82901367A
Other languages
German (de)
English (en)
Other versions
EP0077837A4 (fr
Inventor
Hajimu Inaba
Seiichiro Nakajima
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Publication of EP0077837A1 publication Critical patent/EP0077837A1/fr
Publication of EP0077837A4 publication Critical patent/EP0077837A4/fr
Withdrawn legal-status Critical Current

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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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
    • F15B11/123—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with fluid-operated stops
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke

Definitions

  • the present invention relates to a cylinder unit which is used as an actuator for actuating various kinds of operative matters and more particularly to a duplex cylinder unit capable of applying two actuating actions or double operating forces to an operative matter through the sequential sliding motion of two rod pistons which are received practically concentrically within a single cylinder casing.
  • Cylinder units using fluid pressure such as air pressure and oil pressure and including various kinds of cylinders which are classified by the operating mode into single-acting cylinders, duplex cylinders and multistage cylinders, have been widely used.
  • Even the multistage cylinder among those conventional cylinders merely applies a single operating force to an operative matter in a two-stage mode or in a multistage mode through the two-stage or multistage linear motion of a single rod piston, that is, since a single operating force is applied to one part of an operative matter merely in, at the utmost, a two-stage mode or multistage mode, the application of individual actuating actions or operating forces to two parts of an operative matter is impossible.
  • An object of the present invention is to provide a duplex cylinder unit of a new structure, capable of applying two actuating actions or double operating forces to an operative matter.
  • duplex cylinder unit characterized in that a double-rod piston having a first pressure-receiving surface and a second pressure-receiving surface which is smaller than the first pressure-receiving surface is provided within a-single cylinder casing so as to be slidable from side to side, a single-rod piston having a third pressure-receiving surface of a pressure-receiving area which is practically the same as that of the second pressure-receiving surface, and a fourth pressure-receiving surface of a pressure-receiving area which is smaller than that of the third pressure-
  • FIGS 1 to 3 are longitudinal sectional views showing the constitution and the operating mode of a duplex cylinder unit in accordance with the present invention.
  • the constitution of the duplex cylinder unit in accordance with the present invention will be described first with reference to Fig. 1.
  • the unit has a single cylinder casing 10, which usually has the shape of a hollow cylinder.
  • the opposite ends of the cylinder casing 10 are perfectly sealed with cylinder end plates 12 and 14.
  • Three fluid pressure ports 16, 18, and 20 are formed in the cylinder casing 10.
  • the fluid pressure ports 16 and 20 are provided at positions close to both ends of the cylinder casing, while the fluid pressure port 18 is provided at an intermediate position of the cylinder casing 10. Those positions of the fluid pressure ports will be described in detail afterward.
  • a double-rod piston 22 is received in the cylinder casing 10.
  • a piston 24 is formed in the double-rod piston 22 at the intermediate portion thereof.
  • the respective diameters dl and d2 (dl ⁇ d2) of the left-hand rod and the right-hand rod with respect to the piston 24 of the double-rod piston 22 are different from each other, hence the left-hand pressure--receiving surface 24a is greater than the right-hand pressure-receiving surface 24b.
  • a tubular second rod piston 34 is fitted on the right-hand rod of the double-rod piston 22 on the right-hand side with respect to the piston 24.
  • the second rod-piston 34 is formed in a single rod piston having a piston 36 at the left-end thereof.
  • the diameter of the rod of the single rod piston 34 is d3 (dl ⁇ d2 ⁇ d3). Accordingly, also in the piston 36, the pressure-receiving area of the left-hand pressure-receiving surface 36a is greater than that of the right-hand pressure-receiving surface 36b. Since the second single-rod piston 34 slides along the first double-rod piston 22, the second single-rod piston 34 is provided with slide bearings 38 on the opposite ends thereof. The right--hand end 26 of the double-rod piston 22 and the right-hand end 40 of the single-rod piston 34 are projecting outward through the cylinder end plate 14 each forming a cylinder action part. Operating forces are applied to an operative matter through those ends 26 and 40.
  • the left-hand end 28 of the rod extending on the left-hand side of the piston 24 of the first double-rod piston 22 extends outward through the cylinder end plate 12 and is provided with a stopper 30. Accordingly, the rod piston 22 is allowed to move to the right until the stopper abuts against the outside surface of the cylinder end plate 12 and to move to the left until the piston 24 abuts against the inside surface of the cylinder end plate 12.
  • the second rod piston 34 is allowed to move to the left until the piston 36 thereof abuts against the right-hand surface of the piston 24 of the first rod piston 22 and to move to the right until the piston 36 abuts against the inside surface 14 of the cylinder end plate 14.
  • Sealing packings 42 are put on the respective circumferences of the pistons 24 and 36 which slide along the inside circumference of the cylinder casing 10, for isolating the pressure-receiving surfaces 24a and 24b of the piston 24 and the pressure-receiving surfaces 36a and 36b of the piston 36 from each other. Now, the positions of the fluid pressure ports 16, 18, and 20 will be described in detail.
  • the first fluid pressure port 16 is formed for supplying to and for discharging from a cylindrical space, formed between the cylinder end plate 12 and the left-hand pressure-receiving surface 24a of the piston 24, fluid pressure and more particularly, the fluid pressure port 16 is formed at a position on the right of the cylinder end plate 12 adjoining the inside surface of the cylinder end plate 12 for applying a fluid pressure to the left-hand pressure-receiving surface 24a of the piston 24 in order to move the first double-rod piston 22 from the left end position to the right.
  • the fluid pressure port 18 is formed at a position allowing the application of fluid pressure to the interface of the right-hand pressure-receiving surface 24b of the piston 24 and the left-hand pressure-receiving surface 36a of the piston 36 of the second single-rod piston 34 when the first double-rod piston 22 is moved to the right until the stopper 30 of the piston 24 abuts against the cylinder end plate 12.
  • the fluid pressure port 20 is formed at a position adjoining the cylinder end plate 14 on the left side in order to supply into and to discharge from a cylindrical space, formed between the right-hand pressure-receiving surface 36b of the piston 36 and the inside surface of the cylinder end plate 14, fluid pressure.
  • Figure 1 shows a state in which the first and the second rod pistons 22 and 34 are located at their respective initial positions where they are retracted to their respective extremities.
  • Figure 2 shows a state in which the first rod piston 22 has moved together with the second rod piston 34 to the maximum stroke allowed by the stopper 30, and the stopper 30 abuts against the left-hand outside surface of the cylinder end plate 12.
  • Figure 3 shows a state in which the second rod piston 34 has moved further to the right from the position shown in Fig. 2 and the piston 36 abuts against the cylinder end plate 14.
  • both rod pistons 22 and 34 move integrally to the right under the action of a pressure differential between the respective pressures acting on the left-hand pressure-receiving surface 24a and the right-hand pressure--receiving surface 36b, since the pressure-receiving area of the left-hand pressure-receiving surface 24a of the piston 24 is greater than that of the right-hand pressure--receiving surface 36b of the piston 36 and the rightward movement of the first rod piston 22 is interrupted when the stopper 30 of the first rod piston 22 abuts against the cylinder end plate 12, which is shown in Fig. 2.
  • the second rod piston 34 moves rightward under a pressure differential between a total pressure working on the left-hand pressure--receiving surface 36a through the fluid pressure port 18 and a total pressure working on the right-hand pressure--receiving surface 36b through the fluid pressure port 20, since the left-hand pressure-receiving surface 36a of the piston 36 of the second rod piston 34 is greater than the right-hand pressure-receiving surface 36b of the same, during which the first rod piston 22 remains stopped, since the fluid pressure is applied to the left-hand pressure-receiving surface 24a of the piston 24 of the rod piston 22 through the fluid pressure port 16.
  • the second rod piston 34 stops when the right-hand pressure-receiving surface 36 abuts against the inside surface of the cylinder end plate 14, as shown in Fig. 3.
  • a duplex cylinder action can be applied to an operative matter with the respective outer ends 26 and 40 of the rod pistons 22 and 34 through the sequential cylinder action of the first rod piston 22 and the second rod piston 34.
  • the first and the second rod pistons 22 and 34 can be returned easily to the respective initial positions shown in Fig. 1 after the first and the second rod pistons 22 and 34 have moved to the respective maximum stroke by changing the fluid pressure supply.
  • the fluid pressure ports 16 and 18 among the fluid pressure ports 16 and 18 are changed to the discharge side and the fluid pressure is supplied only through the fluid pressure port 20, then the rod pistons 22 and 34 move integrally leftward until the initial state shown in Fig. 1 is attained, since the fluid pressure is applied only to the right-hand pressure-receiving surface 36b of the piston 36 in the first and the second rod pistons 22 and 34.
  • a double-rod piston having a first pressure-receiving surface and a second pressure-receiving surface which is smaller than the first pressure-receiving surface is provided within a single cylinder casing so as to be slidable from side to side, a single-rod piston having a third pressure-receiving surface of a pressure-receiving area which is practically the same with that of the second pressure-receiving surface and a fourth pressure-receiving surface of a pressure-receiving area which is smaller than that of the third pressure--receiving surface is fitted on the piston rod of the double-rod piston on the side of the second pressure--receiving surface with the third pressure-receiving surface disposed opposite to the second pressure-receiving surface, and a duplex action which is effected by means of the double-rod piston and the single-rod piston is provided by selectively applying a fluid pressure from the first to the fourth pressure
  • duplex cylinder unit of the present invention makes extremely simple and accurate assembling possible; one of the two part elements is press fit into one part element by means of the first rod piston of a duplex cylinder unit, then the other one of the two part elements may be press fit by means of the second rod piston while the previously press fit part element is held in its place.
  • stator outer frame part having permanent magnets when the rotor part of the motor is first press fit to the flange part, then the stator outer frame part having permanent magnets is press fit concentrically on the outer circumference of the rotor part while the misalignment is prevented by holding the rotor part with the first rod piston of the duplex cylinder unit, the stator outer frame part can be accurately press fit into the flange part for assembly while the misalignment resulting from the magnetic attraction is prevented if the magnetic attraction is exerted between the rotor part and the stator outer frame part by the permanent magnets.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Actuator (AREA)

Abstract

Unite de cylindre double dans laquelle une bielle de piston (22) en forme de tige possedant une premiere et une deuxieme surfaces de pression est montee de maniere coulissante lateralement dans une boite de cylindre simple (10) pour entrainer une unite entrainee, et une bielle de piston (34) en forme de tige possedant une troisieme surface de pression sensiblement egale et opposee a la deuxieme surface de pression de la bielle (22) et une quatrieme surface de pression ayant une surface plus petite que celle de la troisieme surface de pression est montee sur la bielle du cote de la deuxieme surface de pression de la bielle (22), permettant ainsi de commander la pression hydraulique actionnant de la premiere a la quatrieme surfaces de pression pour fournir une action double avec les bielles (22 et 34).
EP19820901367 1981-05-06 1982-05-06 Unite de cylindre double. Withdrawn EP0077837A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP66999/81 1981-05-06
JP6699981A JPS57184708A (en) 1981-05-06 1981-05-06 Double cylinder device

Publications (2)

Publication Number Publication Date
EP0077837A1 true EP0077837A1 (fr) 1983-05-04
EP0077837A4 EP0077837A4 (fr) 1984-07-06

Family

ID=13332206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820901367 Withdrawn EP0077837A4 (fr) 1981-05-06 1982-05-06 Unite de cylindre double.

Country Status (4)

Country Link
EP (1) EP0077837A4 (fr)
JP (1) JPS57184708A (fr)
KR (1) KR830010321A (fr)
WO (1) WO1982003896A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308928A1 (de) * 1983-03-12 1984-09-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Hydraulik- oder pneumatikzylinder mit kontinuierlicher druckfluessigkeitsgesteuerter hublaengenverstellung
GB2242231A (en) * 1990-03-13 1991-09-25 Grove Coles Limited Telescopic cylinders
EP1323929A1 (fr) * 2001-12-21 2003-07-02 Techspace Aero S.A. Actionneur pneumatique trois positions
EP1582759A1 (fr) * 2004-03-31 2005-10-05 LuK Lamellen und Kupplungsbau Beteiligungs KG Système d'actionnement hydraulique pour embrayage.
EP3130810A4 (fr) * 2014-04-11 2017-12-27 Shenzhen Biteman Science&Technology Co., Ltd Cylindre, et dispositif d'absorption et de séparation le comportant

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5012725A (en) * 1990-04-19 1991-05-07 Rockwell International Corporation Three position actuator for shifting a two speed transfer case
JP3124526B1 (ja) * 1999-11-22 2001-01-15 エスエムシー株式会社 デュアルストロークシリンダ
FR2848268B1 (fr) 2002-12-06 2006-06-09 Jean Refuveille Verin a chambres multiples
JP4437554B2 (ja) * 2006-12-07 2010-03-24 シーケーディ株式会社 エアオペレイトバルブ
KR101712360B1 (ko) * 2015-06-29 2017-03-07 주식회사 인팩 기밀성을 갖는 더블 클러치 액츄에이터

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR999277A (fr) * 1952-01-29
FR1124969A (fr) * 1954-03-23 1956-10-22 Rolls Royce Perfectionnements aux vérins
DE2658393A1 (de) * 1976-12-23 1978-06-29 Volkswagenwerk Ag Hydraulische oder pneumatische schalt- zylinderanordnung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4415488Y1 (fr) * 1965-02-15 1969-07-04
JPS4643323B1 (fr) * 1968-12-07 1971-12-22
JPS4425709Y1 (fr) * 1969-03-04 1969-10-28
JPS4838156Y1 (fr) * 1970-12-29 1973-11-12
JPS4865985U (fr) * 1971-11-30 1973-08-21

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR999277A (fr) * 1952-01-29
FR1124969A (fr) * 1954-03-23 1956-10-22 Rolls Royce Perfectionnements aux vérins
DE2658393A1 (de) * 1976-12-23 1978-06-29 Volkswagenwerk Ag Hydraulische oder pneumatische schalt- zylinderanordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8203896A1 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308928A1 (de) * 1983-03-12 1984-09-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Hydraulik- oder pneumatikzylinder mit kontinuierlicher druckfluessigkeitsgesteuerter hublaengenverstellung
GB2242231A (en) * 1990-03-13 1991-09-25 Grove Coles Limited Telescopic cylinders
EP1323929A1 (fr) * 2001-12-21 2003-07-02 Techspace Aero S.A. Actionneur pneumatique trois positions
EP1582759A1 (fr) * 2004-03-31 2005-10-05 LuK Lamellen und Kupplungsbau Beteiligungs KG Système d'actionnement hydraulique pour embrayage.
US7370745B2 (en) 2004-03-31 2008-05-13 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Hydraulic clutch-release system
EP3130810A4 (fr) * 2014-04-11 2017-12-27 Shenzhen Biteman Science&Technology Co., Ltd Cylindre, et dispositif d'absorption et de séparation le comportant

Also Published As

Publication number Publication date
KR830010321A (ko) 1983-12-30
EP0077837A4 (fr) 1984-07-06
WO1982003896A1 (fr) 1982-11-11
JPS57184708A (en) 1982-11-13

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19821217

AK Designated contracting states

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850907

RIN1 Information on inventor provided before grant (corrected)

Inventor name: INABA, HAJIMU

Inventor name: NAKAJIMA, SEIICHIRO