EP0967399A2 - Vérin hydraulique à plusieurs étages et à double effet avec circuit hydraulique, surtout pour élévateurs - Google Patents

Vérin hydraulique à plusieurs étages et à double effet avec circuit hydraulique, surtout pour élévateurs Download PDF

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Publication number
EP0967399A2
EP0967399A2 EP99112185A EP99112185A EP0967399A2 EP 0967399 A2 EP0967399 A2 EP 0967399A2 EP 99112185 A EP99112185 A EP 99112185A EP 99112185 A EP99112185 A EP 99112185A EP 0967399 A2 EP0967399 A2 EP 0967399A2
Authority
EP
European Patent Office
Prior art keywords
piston
piston rod
hydraulic
cylinder
hydraulic cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99112185A
Other languages
German (de)
English (en)
Other versions
EP0967399A3 (fr
Inventor
Holger Dipl.-Ing. Wehner
Helfried Dipl.-Ing.(FH) Sterzel
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.)
Bison Stematec Maschinenbau und Hubarbeitsbuehnen Produktionsgesellschaft mbH
Original Assignee
Bison Stematec Maschinenbau und Hubarbeitsbuehnen Produktionsgesellschaft mbH
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 Bison Stematec Maschinenbau und Hubarbeitsbuehnen Produktionsgesellschaft mbH filed Critical Bison Stematec Maschinenbau und Hubarbeitsbuehnen Produktionsgesellschaft mbH
Publication of EP0967399A2 publication Critical patent/EP0967399A2/fr
Publication of EP0967399A3 publication Critical patent/EP0967399A3/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Withdrawn legal-status Critical Current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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type
    • 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
    • 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
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches

Definitions

  • Multi-stage, double-acting are generally known Hydraulic cylinder. These have an outer cylinder housing on that on one side through a case back is completed and on the other hand at least two piston rods arranged one inside the other are led out.
  • the piston rods are axially displaceable on their They each have a piston on the housing bottom end on, between the outer cylinder housing and the first piston rod an annular space is formed, the axial on the one hand by the piston and on the other hand by one End ring is completed and the least a next inner piston rod in the previous piston rod is axially displaceable and being between the Piston rods an annular space is formed which is axially through the piston of the inner piston rod on the one hand and End ring of the outer piston rod is completed.
  • a hydraulic arrangement which has a switching arrangement through which optionally at least an annulus or at least one of the between the Piston of the piston rods or between the piston of the first piston rod and the housing bottom Chambers hydraulic fluid can be supplied, the corresponding other side of the piston with a storage tank connected is. This turns the hydraulic cylinder on or extended.
  • Such multi-stage hydraulic cylinders have the disadvantage on that it depends on the load, in which order the Cylinder stages are addressed. Especially if the hydraulic cylinder is used on aerial work platforms, should improve the operational safety Sequence of actuation of the cylinder stages when expanding and Always retract in the same, defined order respectively.
  • Appropriate access platforms are included multi-stage hydraulic cylinders in the post-published DE 29806602.5 described, whereupon expressly is referenced.
  • the object of the invention is to provide multi-stage hydraulic cylinders a load-independent in the simplest possible way To achieve extension or retraction order of the cylinder stages.
  • the task is characterized by the characteristics of the independent Protection claim resolved.
  • the subclaims represent advantageous developments of the The execution according to the protection claim 2 is a version whose displacement paths oppose the desired order of the cylinder step is minimal, while the embodiment according to claim 3 exposes means, depending on their condition, the check valve is switched.
  • Fig. 1 shows a cross section through the two-stage Hydraulic cylinder 10 with a schematic representation the associated hydraulic system.
  • the cross section through the hydraulic cylinder 10 with its outer cylinder housing 12 and the housing base 30 shows the piston rods 16 arranged axially displaceable therein with their pistons 14, which the chambers 32 are each fluid-tight complete and provide a piston seal 20 for this purpose are.
  • Between outer cylinder housing 12 and outer Piston rod 16 is an annular space 18 formed by the first piston 14 on the one hand and on the other hand by the End ring 26 is limited.
  • the outer piston rod protrudes axially out of the cylinder housing 12. Of the End ring is over a rod seal opposite the axially displaceable outer piston rod 16 sealed.
  • In the outer piston rod 16 is an inner piston rod 16 axially slidably arranged, which also has a Piston 14 has.
  • a chamber 32 formed radially through the outer piston rod 16 is limited.
  • two piston rods formed the axially on the one hand by the piston 14 of the inner piston rod 16 and the other by one at the outer piston rod formed end ring 26th is complete, with a rod seal 28 and a Piston seal 20 effect the fluid tightness of the annular space.
  • the annular spaces 18 are in the basic position fluidly connected to one another via switching bores 24.
  • the switching bores 24 are axial in the piston rod immediately behind the piston 14 of the next inner piston rod 16 arranged and passable by him, whereby then a fluidic connection between chamber 32 of the outer piston rod and the annular space 18 of the next inner Piston rod is manufactured. This will be the fluidic connection between the outer annulus and the Return line 74 interrupted.
  • the inner piston rod has a central bore 38, which also passes through the pistons 14 and thus with the chambers 32 is fluidly connected.
  • the central bore 38 is on the side facing away from the piston 14 with a cover 34 connected.
  • the central hole is through the cover 38 connected to the feed line 72, which when extending of the hydraulic cylinder via the switching valve 64 with the Delivery side of the pump 62 is connected.
  • To the storage tank 68, from which the pump 62 is fed leads via the Switch valve 64 and the check valve 66 the return line 74 through the cover 34 with a ring line 36 in the piston rod 16 is connected.
  • the ring line is via switching holes 24 with the innermost Annulus 18 fluidly connected.
  • Hydraulic cylinders are the feed line 72 and the return line 74 connected to the storage tank while the Pump pumps into the storage tank without load.
  • the return line 74 When entering of the hydraulic cylinder is the return line 74 through the switching valve 64 with the delivery side of the pump 62 fluidly connected, while the feed line 72 with the Storage tank 68 is connected.
  • the check valve 66 and the switching valve 64 are via a Control circuit 78 operated, which also the signal of only on the outer end rings 26 of the piston rods 16 arranged limit switches 76, which monitor whether the piston 14 of the next inner piston rod 16 has reached its end position when extending.
  • the switching valve 64 is in the Position in which the feed line 72 with the delivery side the pump 62 is fluidly connected. Via the central bore first the chamber 32a between the outer Piston 14a and the housing cover 30 filled. The piston 14a is axially displaced towards the end ring 26a. Hydraulic fluid displaced from the annular space 18a reaches through the switching holes 24 and the spur holes 22 in the ring line 36 and flows through the return line 74 and the switching valve 64 in the storage tank 68. Das Check valve 66 remains in its unactuated, the Return line 74 with the switching valve 64 fluid connecting position.
  • Fig. 3 shows the state when due to the outer Load conditions first the inner piston 14b of the inner Piston rod 16b is moved. If so the inner piston 14b initially moves so far that the Switch bores 24 are run over. This is the Annulus 18 no longer via the switching holes 24 and Fluid bores 22 with the ring line 36 connected but via the switching holes 24 with the Chamber 32b. Up to this point, the piston 14a remains in its unactuated position near the housing base 30, the chamber 32a has only a small volume. Now it will Check valve 66 operated by the control circuit 78 and thus the fluidic connection between the return line 74 and storage tank 68 interrupted. From the ring line 36 and no hydraulic fluid can flow into the inner annular space 18b escape.
  • the switching valve 64 is controlled by the control circuit 78 actuates that the feed line 72 fluidly with the Storage tank is connected, causing hydraulic fluid from the Central bore 38 can escape into the storage tank; the Central bore is above the chambers 32a, 32b and Switch bores 24 fluidly with the outer annulus 18a in connection, but not with the inner annular space 18b, the annular space 18b is in turn via the ring line 36 and the switching valve 64 with the delivery side of the pump 62 connected.
  • annular space 18b is initially filled until the inner piston 14b the fluidic connection between the Annulus 18a and annulus 18b through the switching holes 24 releases. This is only the case when the inner one Hydraulic cylinder has reached its retracted end position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Actuator (AREA)
EP99112185A 1998-06-25 1999-06-24 Vérin hydraulique à plusieurs étages et à double effet avec circuit hydraulique, surtout pour élévateurs Withdrawn EP0967399A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29811413U 1998-06-25
DE29811413U DE29811413U1 (de) 1998-06-25 1998-06-25 Mehrstufiger, doppelt wirkender Hydraulikzylinder mit Hydraulikanordnung insbesondere für Hubarbeitssysteme

Publications (2)

Publication Number Publication Date
EP0967399A2 true EP0967399A2 (fr) 1999-12-29
EP0967399A3 EP0967399A3 (fr) 2000-04-26

Family

ID=8059061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99112185A Withdrawn EP0967399A3 (fr) 1998-06-25 1999-06-24 Vérin hydraulique à plusieurs étages et à double effet avec circuit hydraulique, surtout pour élévateurs

Country Status (2)

Country Link
EP (1) EP0967399A3 (fr)
DE (1) DE29811413U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434529A (zh) * 2011-12-06 2012-05-02 中联重科股份有限公司 液压缸伸缩控制回路以及工程机械设备
DE102011101019A1 (de) 2011-05-10 2012-11-15 Pacoma Gmbh Mehrstufiger Druckmittelzylinder
CN102808813A (zh) * 2012-08-20 2012-12-05 李文娟 自卸车前置液压油缸
CN105384091A (zh) * 2015-12-31 2016-03-09 徐州重型机械有限公司 带有多级独立伸缩油缸的伸缩臂结构及起重机
CN111717855A (zh) * 2020-05-21 2020-09-29 国网江西省电力有限公司吉安供电分公司 一种电力维修用升降装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010061840B4 (de) 2010-06-14 2020-01-16 Sms Group Gmbh Kolben-Zylindereinheit als schaltbarer Stufen-Zylinder
CN109869372B (zh) * 2019-03-20 2024-03-29 江苏恒立液压股份有限公司 多级油缸

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29806602U1 (de) 1998-04-09 1999-05-12 BISON stematec Maschinenbau- und Hubarbeitsbühnen Produktionsgesellschaft mbH, 02708 Löbau Teleskopausleger für Hubarbeitsbühnen

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE958718C (de) * 1953-11-11 1957-02-21 Toussaint & Hess Hydr Hebezeug Mehrstufiger hydraulischer Teleskopkolben mit hydraulischem Rueckzug
DK121336B (da) * 1969-12-03 1971-10-04 Islef & Hagen As Arbejdscylinder med positionsgiver.
DE2657831C3 (de) * 1976-12-21 1980-02-21 Algi Alfred Giehl Kg Maschinen- U. Hydraulikbau, 6228 Eltville Hydraulischer Teleskopkolbenantrieb für Hubvorrichtungen
AT360466B (de) * 1979-03-14 1981-01-12 Voest Alpine Ag Ventilanordnung fuer die steuerung des hubes eines teleskopisch ausfahrbaren stempels
DE3206870C2 (de) * 1982-02-26 1984-06-07 Montan-Hydraulik GmbH, 4755 Holzwickede Mehrstufiger hydraulischer Teleskopzylinder mit endkolbenseitiger Druckmittelzuführung
US4516468A (en) * 1983-01-10 1985-05-14 Hydraulic Technology Corporation Double acting telescopic cylinder construction
DE3339851C1 (de) * 1983-11-04 1985-04-04 Montan-Hydraulik GmbH, 4755 Holzwickede Mehrstufiger hydraulischer Teleskopzylinder
US4726281A (en) * 1986-06-13 1988-02-23 Quinto De Filippi Hydraulic cylinder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29806602U1 (de) 1998-04-09 1999-05-12 BISON stematec Maschinenbau- und Hubarbeitsbühnen Produktionsgesellschaft mbH, 02708 Löbau Teleskopausleger für Hubarbeitsbühnen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011101019A1 (de) 2011-05-10 2012-11-15 Pacoma Gmbh Mehrstufiger Druckmittelzylinder
CN102434529A (zh) * 2011-12-06 2012-05-02 中联重科股份有限公司 液压缸伸缩控制回路以及工程机械设备
CN102434529B (zh) * 2011-12-06 2015-03-18 中联重科股份有限公司 液压缸伸缩控制回路以及工程机械设备
CN102808813A (zh) * 2012-08-20 2012-12-05 李文娟 自卸车前置液压油缸
CN105384091A (zh) * 2015-12-31 2016-03-09 徐州重型机械有限公司 带有多级独立伸缩油缸的伸缩臂结构及起重机
CN111717855A (zh) * 2020-05-21 2020-09-29 国网江西省电力有限公司吉安供电分公司 一种电力维修用升降装置

Also Published As

Publication number Publication date
EP0967399A3 (fr) 2000-04-26
DE29811413U1 (de) 1999-08-26

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