EP0296047A1 - Mehrstufiger Zylinder mit mindestens drei verschiebbaren Teilen und dessen Anwendung in Teleskopauslegern - Google Patents

Mehrstufiger Zylinder mit mindestens drei verschiebbaren Teilen und dessen Anwendung in Teleskopauslegern Download PDF

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Publication number
EP0296047A1
EP0296047A1 EP88401457A EP88401457A EP0296047A1 EP 0296047 A1 EP0296047 A1 EP 0296047A1 EP 88401457 A EP88401457 A EP 88401457A EP 88401457 A EP88401457 A EP 88401457A EP 0296047 A1 EP0296047 A1 EP 0296047A1
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EP
European Patent Office
Prior art keywords
section
piston
cylinder
chamber
piston rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88401457A
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English (en)
French (fr)
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EP0296047B1 (de
Inventor
Robert Baraniak
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PPM SA
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PPM SA
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Publication date
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Publication of EP0296047B1 publication Critical patent/EP0296047B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type

Definitions

  • FR-A-2 345 608 describes such a jack.
  • the fluid supply and exhaust pipes of this cylinder are connected to the larger diameter cylinder.
  • the object of the invention is therefore firstly to specify the arrangements which allow these preferred embodiments to be obtained and which are defined in the characterizing part of claim 1.
  • the jack comprises a fifth conduit, which is contained in the piston rod, which opens into the second large chamber and which is connected to a selective device for supplementing the supply of pressurized fluid;
  • the selective device supplemental feeding pressurized fluid is constituted by a two-position fluid distributor, a connecting conduit, which connects the two-position fluid distributor which is connected to said connecting conduit and the second conduit supply supplement, which connects said two-position fluid distributor to said fifth conduit, the two positions of the two-position fluid distributor corresponding, the first position, to the closure of the supply complement conduit, and, the second position, when the connecting duct is placed in communication with the supply complement duct;
  • the two-position fluid distributor includes an electromagnetic device for adjusting its position which is connected to one of the electrical terminals of a pressure switch, which is itself connected to said supply complement duct;
  • the actuator comprises a calibrated relief valve connected in bypass to said fifth conduit.
  • the invention also more particularly relates to a telescopic boom comprising a first internal section, a second intermediate section, inside which the first section is slidably mounted, and a third section, external, inside. which the second section is slidably mounted, while a cylinder as described above is mounted therein, longitudinally inside the three said sections, the first cylinder being integral with the first section, the second cylinder being integral with the second section and the piston rod being integral with the third section.
  • the first cylinder is fixed on the internal end of the first section
  • the second cylinder is fixed on the internal end of the second section
  • the piston rod is fixed on the part of the third section, which is opposite to the axial opening of this third section through which the second section penetrates.
  • the main advantage of the invention lies in the possibility of obtaining simultaneous displacements and at equal relative speeds of the elements of the jack, and of the boom sections, without having to resort to complicated, heavy, expensive and fragile mechanical assemblies.
  • the jack shown in the figure includes: - A first cylinder 1 comprising at each end a bottom 2, 3; - A first piston 4, which is slidably mounted inside the first cylinder 1 and which delimits there, in cooperation with the bottom 2, a first large chamber 5 of large useful section S5, and, in cooperation with the bottom 3, a first small chamber 6 of small useful section S6 (less than the useful section S5); - A second cylinder 7 which comprises, at one end, a bottom formed by the first piston 4 and, at the other end, a bottom 8 which is integral with the first piston 4, and which crosses with seal 3b the bottom 3 of the first cylinder 1 which, in cooperation with the first piston 4, delimits the first small useful chamber 6; - A second piston 9, which is slidably mounted inside the second cylinder 7 and which delimits there, in cooperation with the first piston 4, a second large chamber 10 of large useful section S10, and, in cooperation with the bottom 8 of the second cylinder, a second small chamber 11 of small useful section S11 (less than the useful
  • the second conduit 16 and the third conduit 18 open to the outside of the piston rod 12 by fittings 20, 21, respectively.
  • the cylinder supply circuit is itself constituted by: - a fluid reservoir 22; - a pump 23; - a three-position distributor 24; - a calibrated relief valve 25; - The suction pipe 26 and the discharge pipe 27 of the pump 23, which connect it to the tank 22 and to the distributor 24, respectively; - conduits 28 and 29, which connect the distributor 24 to the connections 20, 21, respectively; - A conduit 30, which connects the distributor 24 to the reservoir 22; and a duct 31 which connects the discharge duct 27 to the reservoir 22 and on which the calibrated relief valve 25 is placed.
  • the three positions of the distributor 24 correspond: - The first position, when the conduits 27 and 28 are put into communication, and the conduits 29 and 30; - The second position, to close the conduits 28 and 29, and to connect the conduits 27 and 30; and - the third position, when the conduits 27 and 29 are put into communication, and the conduits 28 and 30.
  • a circuit for adjusting the volume of fluid contained in the chambers 10 and 6 is also provided and consists of: - A fifth conduit 42, internal to the piston rod 12, which opens into the second large chamber 10 and connects it to an external connector 43; - A two-position fluid distributor 44, provided with an electromagnetic device 45 for adjusting its position, the effect of which, when energized, is antagonistic to that of a return spring 46; - A pressure switch 47 with two electrical terminals 48, 49, a hydraulic connection 50 and a return spring 51 with an effect antagonistic to that of the pressurized fluid contained in the hydraulic connection 50; - an electric earth 52; - a calibrated relief valve 53; - A connecting duct 54, connecting the two-position fluid distributor 44 to the duct 28; - a supply complement duct 55, connecting the fluid distributor in two positions to the external connector 43; - A conduit 56, connecting the additional supply conduit 55 to the fluid reservoir 22, the calibrated relief valve 53 being disposed on this conduit 56; - A conduit 57, connecting the hydraulic connection 50 of the pressure
  • the setting of the relief valve 53 is higher, for example by 20 bars, than that of the pressure switch 47, and is equal to 350 bars, that of the pressure switch being equal to 330 bars. This implies that, as long as the pressure in the conduit 57 is greater than 330 bars, the pressure switch 47 does not make the electrical connection between its terminals 48 and 49, and the electromagnetic device 45 is not energized, so that, under the unique effect of the spring 46, the fluid distributor 44 is placed in its first position.
  • This fluid distributor 44 corresponds: - The first position, to the obturations of the connection duct 54 and the supply complement duct 55; and - the second position, when the connecting pipe 54 and the additional supply pipe 55 are placed in communication.
  • the jack which has just been described, is placed inside a telescopic boom with three sections, the axis 32 of the jack substantially coinciding with the axis of this arrow.
  • This consists of a first internal section 33, a second intermediate section 34 and a third external section 35, slidably mounted, the first section 33 inside the second section 34, into which it enters through an opening 34a, and the second section 34 inside the third section 35, into which it enters through an opening 35a.
  • Sliding members, rollers or sliding pads make these sliding possible.
  • these are rollers 36 and 37, mounted inside the second section 34 and the third section 35, respectively, near their respective openings, and rollers 38 and 39, mounted at the 'outside of the first section 33 and the second section 34, respectively, near their respective bottoms, opposite the openings 33a and 34a of these sections.
  • first (1) and second (7) cylinders are extended by sails, which are fixed (3a, 8a) to the internal ends of the first (33) and second (34) sections of the boom telescopic and constitute the bottoms of these respective sections.
  • the third section 35 is closed by a bottom 40, on which is fixed (41) the end of the piston rod 12.
  • the section S10 of the second large chamber 10 is, in the embodiment described, equal to the section S6 of the first small chamber 6. Because these two chambers are in permanent communication with one another, and with no other chamber, the volume of fluid which leaves one of these two chambers (or which enters it) is necessarily received in the other chamber (or leaves it).
  • sections S10 and S6 are equal, this implies that the second cylinder 7 moves with respect to the second piston 9 at the same speed and simultaneously with the movement of the first cylinder 1 with respect to the first piston 4.
  • the relative strokes C33 / 34 and C34 / 35 of the first section 33 relative to the second section 34, and of the second section 34 relative to the third section 35 are also equal.
  • the sum of the volumes of the first small chamber 6 and the second large chamber 10 was assumed to be constant. In reality, inevitable leaks cause slight variations in the value of this sum of volumes, and it is often necessary to supplement the quantity of fluid contained in these chambers, or, on the contrary, to allow an evacuation of excess fluid. This complement or this evacuation of fluid is carried out automatically in the following manner.
  • the three-position distributor 24 is assumed to have been placed in its first position.
  • the pressure of this fluid decreases and becomes lower than the setting pressure of the pressure switch 47, which causes the electrical connection between the two terminals 48, 49 and, consequently , the supply of electrical energy to the electromagnetic device 45, which places the fluid distributor in two positions 44 in its second position.
  • the pressure of this fluid increases until reaching the value of the setting pressure of the relief valve 53: by means of this relief valve 53, the maximum pressure in the second large chamber 10 is limited to a value making it possible to prohibit any deterioration of the jack.
  • the actual telescoping control is as follows: - For the output of the sections relative to each other, and the extension of the arrow, the distributor 24 is placed in its first position: the fluid discharged by the pump 23 fills the first large chamber 5; the first piston 4 approaches the bottom 3 of the first cylinder 1; the fluid contained in the first small chamber 6 is driven out of this chamber and will fill the second large chamber 10; the second piston 9 approaches the bottom 8 of the second cylinder 7; and the fluid contained in the second small chamber 11 is expelled therefrom and, through the fourth 19 and third conduits 18, and the conduit 29, returns to the reservoir 22; - for the return of the various sections and the retraction of the boom, the installation of the distributor 24 in its third position causes the reverse displacements of those described with regard to the exit of these sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Jib Cranes (AREA)
EP19880401457 1987-06-15 1988-06-14 Mehrstufiger Zylinder mit mindestens drei verschiebbaren Teilen und dessen Anwendung in Teleskopauslegern Expired - Lifetime EP0296047B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8708297 1987-06-15
FR8708297A FR2616489A1 (fr) 1987-06-15 1987-06-15 Verin multiple a au moins trois elements coulissants et fleche telescopique en faisant application

Publications (2)

Publication Number Publication Date
EP0296047A1 true EP0296047A1 (de) 1988-12-21
EP0296047B1 EP0296047B1 (de) 1991-04-03

Family

ID=9352031

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EP19880401457 Expired - Lifetime EP0296047B1 (de) 1987-06-15 1988-06-14 Mehrstufiger Zylinder mit mindestens drei verschiebbaren Teilen und dessen Anwendung in Teleskopauslegern

Country Status (3)

Country Link
EP (1) EP0296047B1 (de)
DE (1) DE3862246D1 (de)
FR (1) FR2616489A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0446115A1 (de) * 1990-03-06 1991-09-11 Ppm Societe Anonyme: Mehrfachzylinder, Versorgungskreis für einen solchen Zylinder und Teleskopausleger als Anwendung dieses Zylinders
EP0551716A1 (de) * 1992-01-14 1993-07-21 SIMON CELLA S.r.L. Hydraulischer Arbeitszylinder
US5435228A (en) * 1993-07-20 1995-07-25 Pneumatic Energy Inc Pneumatic transformer
EP0849824A1 (de) * 1996-12-20 1998-06-24 Yuasa Koki Co Ltd Vorrichtung zum Heben und Senken von Lasen
KR100597531B1 (ko) * 1998-04-06 2006-07-10 그로우브 유.에스. 엘.엘.씨. 다단계 신축 실린더를 갖는 신축 시스템
CN102678662A (zh) * 2012-05-14 2012-09-19 长沙金阳机械设备科技开发有限公司 快慢速行程一体化节能油缸及其应用装置
FR3013744A1 (fr) * 2013-11-26 2015-05-29 Greffet Sas Saigneuse a fosse hydraulique caracterisee par un bras telescopique lineaire a debattement de 2000 mm reglable en rotation a plus ou moins 45° de la route
CN105782160A (zh) * 2016-05-11 2016-07-20 中国工程物理研究院总体工程研究所 单杆出入双向等载液压缸
ITUB20160363A1 (it) * 2016-01-29 2017-07-29 Manitou Italia Srl Braccio telescopico per macchine operatrici semoventi.
CN110296262A (zh) * 2019-06-27 2019-10-01 佛山市恒力泰机械有限公司 一种多级驱动缸以及一种多级驱动的插装阀

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101900150B (zh) * 2010-08-31 2013-11-20 三一汽车起重机械有限公司 多级油缸及具有其的液压设备
CN103452949A (zh) * 2013-09-16 2013-12-18 大连宏远气动液压船舶辅机有限公司 节能双速液压缩复合油缸

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603207A (en) * 1969-05-26 1971-09-07 Koehring Co Multiple-cylinder telescopic actuator
US3624979A (en) * 1969-08-25 1971-12-07 Daniel F Przybylski Telescoping hydraulic cylinder arrangement for multiple section extensible booms

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345608A1 (fr) * 1976-03-23 1977-10-21 Pagliero Pietro Dispositif hydraulique a verins multiples coaxiaux et telescopiques actionnes simultanement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603207A (en) * 1969-05-26 1971-09-07 Koehring Co Multiple-cylinder telescopic actuator
US3624979A (en) * 1969-08-25 1971-12-07 Daniel F Przybylski Telescoping hydraulic cylinder arrangement for multiple section extensible booms

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 31 (M-192)[1176], 8 fevrier 1983; & JP-A-57 184 709 (YUNITSUKU K.K.) 13-11-1982 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0446115A1 (de) * 1990-03-06 1991-09-11 Ppm Societe Anonyme: Mehrfachzylinder, Versorgungskreis für einen solchen Zylinder und Teleskopausleger als Anwendung dieses Zylinders
FR2659398A1 (fr) * 1990-03-06 1991-09-13 Ppm Sa Verin multiple, circuit d'alimentation d'un tel verin, et fleche telescopique faisant application de ce verin.
US5111733A (en) * 1990-03-06 1992-05-12 Ppm Multiple stage hydraulic jack for use with telescopic jib
EP0551716A1 (de) * 1992-01-14 1993-07-21 SIMON CELLA S.r.L. Hydraulischer Arbeitszylinder
US5435228A (en) * 1993-07-20 1995-07-25 Pneumatic Energy Inc Pneumatic transformer
EP0849824A1 (de) * 1996-12-20 1998-06-24 Yuasa Koki Co Ltd Vorrichtung zum Heben und Senken von Lasen
US5850713A (en) * 1996-12-20 1998-12-22 Yuasa Koki Co., Ltd Device raising and lowering apparatus
KR100597531B1 (ko) * 1998-04-06 2006-07-10 그로우브 유.에스. 엘.엘.씨. 다단계 신축 실린더를 갖는 신축 시스템
CN102678662A (zh) * 2012-05-14 2012-09-19 长沙金阳机械设备科技开发有限公司 快慢速行程一体化节能油缸及其应用装置
FR3013744A1 (fr) * 2013-11-26 2015-05-29 Greffet Sas Saigneuse a fosse hydraulique caracterisee par un bras telescopique lineaire a debattement de 2000 mm reglable en rotation a plus ou moins 45° de la route
ITUB20160363A1 (it) * 2016-01-29 2017-07-29 Manitou Italia Srl Braccio telescopico per macchine operatrici semoventi.
EP3199485A3 (de) * 2016-01-29 2017-08-09 Manitou Italia S.r.l. Teleskopausleger für selbstangetriebene arbeitsmaschinen
US10017363B2 (en) 2016-01-29 2018-07-10 Manitou Italia S.R.L. Telescopic arm for self-propelled operating machines
AU2016269490B2 (en) * 2016-01-29 2022-07-07 Manitou Italia S.R.L. A telescopic arm for self-propelled operating machines
CN105782160A (zh) * 2016-05-11 2016-07-20 中国工程物理研究院总体工程研究所 单杆出入双向等载液压缸
CN110296262A (zh) * 2019-06-27 2019-10-01 佛山市恒力泰机械有限公司 一种多级驱动缸以及一种多级驱动的插装阀

Also Published As

Publication number Publication date
EP0296047B1 (de) 1991-04-03
DE3862246D1 (de) 1991-05-08
FR2616489A1 (fr) 1988-12-16

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