EP2199244B1 - Hydraulischer Aufzug - Google Patents

Hydraulischer Aufzug Download PDF

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Publication number
EP2199244B1
EP2199244B1 EP09179422A EP09179422A EP2199244B1 EP 2199244 B1 EP2199244 B1 EP 2199244B1 EP 09179422 A EP09179422 A EP 09179422A EP 09179422 A EP09179422 A EP 09179422A EP 2199244 B1 EP2199244 B1 EP 2199244B1
Authority
EP
European Patent Office
Prior art keywords
fixed
cylinder
tubular riser
piston
cabin
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.)
Not-in-force
Application number
EP09179422A
Other languages
English (en)
French (fr)
Other versions
EP2199244A1 (de
Inventor
Edoardo Rolla
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.)
Filippo Rolla Srl
Original Assignee
Filippo Rolla Srl
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 Filippo Rolla Srl filed Critical Filippo Rolla Srl
Publication of EP2199244A1 publication Critical patent/EP2199244A1/de
Application granted granted Critical
Publication of EP2199244B1 publication Critical patent/EP2199244B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically

Definitions

  • the present invention relates to hydraulic lifts.
  • hydraulically operated lifts have been developed where the cabin is raised and lowered by means of the reciprocating displacement of a piston sliding inside a single-acting cylinder, the end of which is mounted on the floor of the pit inside the lift travel shaft.
  • Fig. 1 of the accompanying drawings A side elevation and partially sectioned view of an example of a known hydraulic lift is shown schematically in Fig. 1 of the accompanying drawings.
  • 8 denotes a tubular cylinder which extends from the bottom floor 4 of the lift pit to about halfway along the overall height of the travel which is to be performed by the lift cabin 1.
  • the document DE 3002577 A1 describes an hydraulic lift in which, via a loose pulley and a rope, a cylinder drives a car with a total load (Q + F), in which Q is the movable load and F is the weight of the car, and in which the cylinder carries a counterweight to the value of 2(Q/2 + F). Furthermore, the cylinder is guided along piston rod which is under prestress Q, is anchored in a foundation and at the same time has a bore for supplying the hydraulic fluid. Due to the movement of the cylinder along the piston rod under prestress, a smaller design of the piston rod than in the conventional arrangement with fixed cylinder and movable piston rod is obtained.
  • the document JP 2001063939 A describes a movable cylinder and hydraulic elevator using it in which the lower end of a hollow upper piston rod is fixed to the upper face of a piston, and an upper side inner port is provided near there in communication with the hollow portion and an upper side outer port is provided near the upper end as a fixed point of the upper piston rod in communication with the hollow portion.
  • the upper end of a hollow lower piston rod is fixed to the lower face of the piston, and an lower side inner port is provided near there in communication with the hollow portion and a lower side outer port is provided near the lower end as a fixed point of the lower piston rod in communication with the hollow portion.
  • An upper cylinder chamber on the upper side of the piston and a lower cylinder chamber on the lower side of the piston are provided in a cylinder tube slidable vertically with the inner periphery being inscribed on the outer periphery of the piston.
  • the document WO 00/71456 A1 describes a hydraulic elevator installation, comprising a counterweight, in which a cylinder can be displaced along a piston rod. Said piston rod can be connected in a fixed manner to sections of a building.
  • the cylinder has two pressure chambers, between which hydraulic oil can be circulated, using a pump. This process displaces the cylinder along the piston rod.
  • the movement of the cylinder is transmitted to a cabin by means of a cable which is guided over deflection pulleys.
  • the cylinder forms part of the counterweight in relation to the cabin.
  • the pump and a motor which drives the same are fixed to the cylinder in such a way that these also function as part of the counterweight.
  • the document EP 0254 840 A2 describes a lifting device having a hydraulic linear motor, which is made up of a double-acting hydraulic cylinder and two stationarily anchored piston rods, connected to the piston.
  • a cage is effectively connected to the hydraulic cylinder via a roller of a cable line, fastened at the upper end of the hydraulic cylinder.
  • the hydraulic drive is connected via a control unit through its supply lines to connection points of the hollow-drilled piston rods, and consequently to the hydraulic cylinder.
  • the overall load is compensated, at least partly, by a counterweight, which is fastened to the hydraulic cylinder.
  • the object of the present invention is therefore to provide a hydraulic lift which is able to overcome the drawbacks of the known hydraulic lifts, which allows optimization of the amount of energy which is used in order to raise and lower the cabin, resulting in a considerable saving in energy which can be calculated as being equivalent to about two thirds of that of the hoisting systems of conventional hydraulic lifts, and in which, advantageously, it is possible to adjust the working stroke of the cylinder so as to ensure mechanical stoppage of the cylinder at the end surfaces, without having to provide a cylinder/piston assembly especially for each use, but by constructing it in modular fixed sizes
  • the known hydraulic lift comprises a tubular riser 17 consisting of two fixed tubular stems which are fixed at their ends between the bottom part or floor 4 of the travel shaft of the lift cabin and the top part or ceiling 12 of this shaft.
  • the stems of the riser 17 are connected at their ends to unions 18 and 19 for supplying and/or discharging, respectively, a hydraulic fluid, which are associated with a hydraulic circuit comprising a motor-driven pump (not shown).
  • 121 denotes a fixed cylindrical piston which is positioned at the central end of the stems of the riser 17 and is concentric with said stems of the tubular riser.
  • Said piston 121 also comprises a fixed diaphragm 221 which divides the internal compartment of said tubular riser 17 into two chambers 26 and 126 which are not interconnected.
  • 16 denotes a movable cylinder which is positioned coaxially around these stems of the fixed riser 17 so as to create a cylindrical cavity 20 and 120 which is formed between these stems of the fixed riser 17 and this movable cylinder 16 and inside which said fixed cylindrical piston 121 is sealingly positioned for example by means of a double set of O-rings 22.
  • the chambers 26 and 126 communicate, upstream and downstream of the piston 121, respectively, via radial apertures 24 and 23, with the cylindrical cavities 120 and 20 of the cylinder 16.
  • the counterweight 15 is mounted on the cylinder 16, and the idle pulleys 13 are keyed onto the cylinder/counterweight assembly by means of the spindles 14.
  • the movable cylinder 16 has a length equal to about half the height of the fixed riser 17 for the purposes which will be described below.
  • Fig. 2 of the accompanying drawings 1 denotes the cabin of the lift.
  • the ends of the cables 2 (only one of which is visible in the figures) are fixed to the structure of the cabin 1.
  • Each of these cables 2 is driven, upstream of the cabin, around a first pair of idle pulleys 11 which are fixed to the top part 12 of the lift housing structure. From this first pair of pulleys 11 the cables 2 pass around a second series of idle pulleys 13, the spindles 14 of which are fixed laterally to the cylinder/counterweight assembly 15, 16 and, from these pulleys 13, the cables 2 lead to the anchoring means 204 on the ceiling 12 of the structure.
  • the counterweight 15 must have a weight such as to counterbalance the weight of the lift cabin 1 plus part of carrying capacity.
  • Fig. 5 shows the hydraulic lift according to the invention, in which identical parts have the same numbers as that used in the above description.
  • the central piston which is positioned at half the height and concentric with the stems 171 and 172 of the tubular riser 17, is formed in this variant by two pistons 121 and 122 each equipped with a diaphragm 221 and 222.
  • a chamber 300 is therefore formed between these diaphragms 221 and 222, resulting in a reduction in the working stroke of the cylinder 16; in fact, the greater the distance between the attachment point fixed to the top part 12 and the attachment point fixed to the bottom part 4, the greater will be the size of this chamber 300 between the diaphragms 221 and 222 of the two pistons 121 and 122 and the smaller will be the extension of the cylindrical cavities 20 and 120.
  • the pressure of the hydraulic fluid inside the chamber 300 must always be less than or equal to the pressure inside the cavities 20 and 120 and therefore two non-return valves 30 and 31 are positioned on the diaphragms 221 and 222. These non-return valves 30 and 31 allow the hydraulic fluid which is present inside the chamber 300 to pass into the cavities 20 and 120 should the pressure of the fluid inside the chamber 300 be greater than the pressure inside the cavities 20 and 120.
  • Two cylindrical sleeves 250 and 251 are also formed in the vicinity of the ends of the cylinder 16.
  • a series of radial apertures 230, 231 and 232 connecting the chamber 126 to the cylindrical cavity 20 are formed on the stem 172 in the vicinity of the piston 121, while a series of radial apertures 240, 241, 242 connecting the chamber 26 to the cylindrical cavity 120 are formed in the vicinity of the piston 122.
  • the sleeve 251 will gradually obstruct the radial apertures 240, 241 and 242, damping the contact between this cylinder 16 and the piston 112.
  • contact between the top end of the cylinder 16 and the piston 221 will be cushioned by gradual closing of the radial apertures 230, 231 and 232.
  • Fig. 4 shows a further constructional variant of the present hydraulic lift in which the cables 2 fixed to the cabin 1, once they have passed around the pulleys 11, are fixed directly to the cylinder 16 by means of the corresponding attachment points 32.
  • This variant of the present lift may be used in the case where the distance between the attachment points on the top part 12 and the bottom part 4 is greater than twice the working stroke of the lift. With this variant it is also possible to reduce the weight of the counterweight by about half.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Types And Forms Of Lifts (AREA)
  • Valve Device For Special Equipments (AREA)
  • Braking Systems And Boosters (AREA)
  • Actuator (AREA)

Claims (6)

  1. Hydraulischer Aufzug, der aufweist: ein rohrförmiges Steigrohr (17), das an seinen Enden mittels geeigneter Verbindungen zwischen dem Boden (4) des Aufzugkabinenschachts und der Decke (12) des Schachts montiert ist und das an seinen Enden mit Rohrverbindungen (18, 19) in Verbindung steht, um eine Hydraulikflüssigkeit zuzuführen und abzuleiten; wenigstens einen festen zylindrischen Kolben (121), der auf halber Strecke entlang der Höhe konzentrisch mit dem rohrförmigen Steigrohr (17) positioniert ist; wenigstens eine feste Membran (221), die sich auf der Höhe des zylindrischen Kolbens (121) befindet und die das rohrförmige Steigrohr (17) in zwei Kammern (26; 126) teilt, die nicht miteinander verbunden sind; einen Zylinder (16), der koaxial mit dem rohrförmigen Steigrohr (17) ist und einen zylindrischen Hohlraum (20; 120) definiert, der den festen zylindrischen Kolben (121) abdichtend aufnimmt; wobei der Zylinder (16) eine Länge gleich etwa einer Hälfte der Länge des rohrförmigen Steigrohrs (17) hat und der Zylinder (16) fähig ist, relativ zu dem festen Kolben (121) von einem Ende des rohrförmigen Steigrohrs (17) zu dem anderen zu gleiten; Verbindungsöffnungen (23; 24) auf den zwei Seiten des festen Kolbens (121), die fähig sind, die zwei Kammern (26, 126) des rohrförmigen Steigrohrs mit dem zylindrischen Hohlraum (20; 120) des beweglichen Zylinders (16) zu verbinden; Einrichtungen zum abwechselnden Zuführen des unter Druck stehenden Fluids in die zwei Kammern (26; 126) des rohrförmigen Steigrohrs (17), um zu bewirken, dass der bewegliche Zylinder (16) aufwärts oder abwärts gleitet; wenigstens ein erstes Paar von beweglichen Rollen (11), die jeweils an einem Verankerungspunkt befestigt sind, der sich auf der Decke (12) des Fahrschachts der Aufzugkabine (1) befindet; wenigstens ein zweites Paar von beweglichen Rollen (13), das auf dem beweglichen Zylinder montiert ist und relativ zu diesem in diametral entgegengesetzten Richtungen befestigt ist; wenigstens ein Paar von Kabeln (2) zum Aufhängen einer Kabine (1), die an einem Ende an der Decke (12) befestigt sind und um das zweite Paar von beweglichen Rollen (13) herum angetrieben werden und von dem Letzteren um das erste Paar von beweglichen Rollen (11) laufen und dann an der Struktur der Kabine (1) befestigt sind, und Einrichtungen (15) zum Ausgleichen des Gewichts der Kabine, die an dem beweglichen Zylinder befestigt sind, dadurch gekennzeichnet, dass der Hydraulikkolben durch zwei Kolben (121, 122) ausgebildet ist, die jeweils mit einer zugehörigen Membran (221, 222) verbunden sind, wobei eine Innenkammer (300) zwischen den Kolben (121, 122) ausgebildet ist und wenigstens ein Rückschlagventil (30, 31) in jeder der Membranen positioniert ist, um die Innenkammer (300) mit den Kammern (26, 126) zu verbinden, die in dem rohrförmigen Steigrohr (17) ausgebildet sind, wobei eine Reihe radialer Öffnungen (230, 231, 232, 240, 241, 242) in der Nachbarschaft jedes der Kolben (121, 122) bereitgestellt ist, um die Kammern (126, 26) mit den zylindrischen Hohlräumen (20, 120) zu verbinden, wobei Manschetten (250, 251) in der Nachbarschaft der Enden des beweglichen Zylinders (16) positioniert sind, um die radialen Öffnungen (230, 231, 232, 240, 241, 242) allmählich zu schließen.
  2. Hydraulischer Aufzug nach Anspruch 1, dadurch gekennzeichnet, dass jeder der festen Kolben (121, 122) eine zylindrische Umfangsmanschette aufweist, die den zylindrischen Hohlraum in zwei Kammern (20, 120) teilt.
  3. Hydraulischer Aufzug nach Anspruch 1, dadurch gekennzeichnet, dass der feste Kolben (121) den Hohlraum des festen rohrförmigen Steigrohrs (17) in zwei Kammern (26; 126) teilt.
  4. Hydraulischer Aufzug nach Anspruch 1, dadurch gekennzeichnet, dass die zylindrische Manschette oder der feste Kolben (121) Dichtungen (22) aufweist.
  5. Hydraulischer Aufzug nach Anspruch 1, dadurch gekennzeichnet, dass der bewegliche Zylinder (16) Dichtungen (25) an seinen Enden aufweist.
  6. Hydraulischer Aufzug nach Anspruch 1, dadurch gekennzeichnet, dass die an der Kabine (1) befestigten Kabel (2), wenn sie einmal um die Rollen (11) gelaufen sind, mit Hilfe der entsprechenden Befestigungspunkte (33) direkt an dem Zylinder (16) befestigt sind.
EP09179422A 2008-12-19 2009-12-16 Hydraulischer Aufzug Not-in-force EP2199244B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000106A ITGE20080106A1 (it) 2008-12-19 2008-12-19 Ascensore idraulico

Publications (2)

Publication Number Publication Date
EP2199244A1 EP2199244A1 (de) 2010-06-23
EP2199244B1 true EP2199244B1 (de) 2011-08-03

Family

ID=41682776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09179422A Not-in-force EP2199244B1 (de) 2008-12-19 2009-12-16 Hydraulischer Aufzug

Country Status (4)

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EP (1) EP2199244B1 (de)
AT (1) ATE518797T1 (de)
ES (1) ES2368609T3 (de)
IT (1) ITGE20080106A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2426513B1 (es) * 2011-07-06 2014-07-01 General Elevadores Xxi, S.L. Suelo practicable para cabinas elevadoras y similares

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002577A1 (de) * 1980-01-25 1981-07-30 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Hydraulischer aufzug mit indirekt wirkendem antrieb
CH674641A5 (de) * 1986-06-11 1990-06-29 Gebauer Ag
EP1181230B1 (de) * 1999-05-19 2003-07-30 Wittur AG Hydraulischer aufzug
JP2001063939A (ja) * 1999-08-31 2001-03-13 Oil Drive Kogyo Kk 可動シリンダとこれを用いた油圧エレベータ
GB0006033D0 (en) * 2000-03-13 2000-05-03 Ganus Eng Co Ltd Hydraulic synchronised cylinder
DE10043051B4 (de) * 2000-09-01 2004-12-09 Zf Sachs Ag Führung einer Kolbenstange für ein Kolben-Zylinder-Aggregat
DE112005001015A5 (de) * 2004-02-24 2007-05-24 Anna Widmann Hydraulischer Antrieb mit feststehendem Kolben für Aufzüge

Also Published As

Publication number Publication date
ITGE20080106A1 (it) 2010-06-20
ATE518797T1 (de) 2011-08-15
EP2199244A1 (de) 2010-06-23
ES2368609T3 (es) 2011-11-18

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