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EP0245328B1 - Hebebühne - Google Patents

Hebebühne Download PDF

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Publication number
EP0245328B1
EP0245328B1 EP86906341A EP86906341A EP0245328B1 EP 0245328 B1 EP0245328 B1 EP 0245328B1 EP 86906341 A EP86906341 A EP 86906341A EP 86906341 A EP86906341 A EP 86906341A EP 0245328 B1 EP0245328 B1 EP 0245328B1
Authority
EP
European Patent Office
Prior art keywords
tilting
base
working plane
articulated
scissor
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.)
Expired - Lifetime
Application number
EP86906341A
Other languages
English (en)
French (fr)
Other versions
EP0245328A1 (de
Inventor
Raimo Juhani POLOJÄRVI
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.)
Orion Oyj
Orion Yhtyma Normet Oy
Original Assignee
Orion Yhtyma Oy
Orion Yhtyma Normet Oy
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 Orion Yhtyma Oy, Orion Yhtyma Normet Oy filed Critical Orion Yhtyma Oy
Publication of EP0245328A1 publication Critical patent/EP0245328A1/de
Application granted granted Critical
Publication of EP0245328B1 publication Critical patent/EP0245328B1/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
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0625—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement with wheels for moving around the floor
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0633—Mechanical arrangements not covered by the following subgroups
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • B66F7/0683—Scissor linkage plus tilting action
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/22—Lifting frames, e.g. for lifting vehicles; Platform lifts with tiltable platforms

Definitions

  • the subject of the present invention is a lift platform, which comprises a working plane, a base, and at least one scissor-like articulation mechanism which connects the working plane and the base with each other, the working plane being arranged displaceable substantially vertically relative the base by means of the said articulation mechanism and at least one hydraulic lifting cylinder connected to same and also tiltabie longitudinally relative to the base.
  • a lift platform in which a particular scissor-like articulation mechanism is used so as to displace the working plane vertically relative the base is known in prior art.
  • an articulation mechanism comprises beams articulated with each other crosswise in the way of scissors, the lifting force being imparted to the said beams by means of a hydraulic cylinder placed between the articulation point and the base.
  • the beams are attached to the working plane and to the base conventionally by means of an articulated joint, but at the opposite ends the beams are, as a rule, mounted mowably on a horizontal guide in order that a movement of the mechanism should be possible.
  • 1 354 962 describes a cargo handling device used for the loading of aeroplanes, which said device comprises two separate lift platforms provided with scissor-like articulation mechanisms.
  • the said lift platforms are, however, of conventional construction, and none of them is provided with a possibility of tilting. If the above devices of prior-art technology were to be provided with a possibility of tilting, the construction of the devices would have to be modified considerably and, in order to permit tilting of the working plane, the devices would have to be provided with a separate tilting mechanism. This would make the said lift platforms highly complicated and inconvenient in operation.
  • a lift platform according to the preamble of claim 1 is shown in DE-A-2 224 713, in which the working plane is tiltable (in only one direction) relative to the scissor mechanism, and in CH-B-489 383 and DK-B-141 864, in each of which the scissor mechanism has sliding joints allowing the working plane to tilt (again in only one direction).
  • the object of the present invention is to provide a lift platform whose working plane is arranged tiltable in two directions.
  • the present invention is characterised in that a first pair of articulated arms of the crosswise pairs of articulated arms of the single or lowermost scissor-like articulation mechanism are attached to the base by a tilting mechanism, by means of which the working plane is tiltable longitudinally relative to the base in both longitudinal directions by tilting the whole scissor-like articulation mechanism.
  • the working plane of the platform in accordance with the invention is arranged tiltable in two directions without a complicated tilting mechanism provided for the working plane.
  • the entire articulation mechanism of the lift platform is tilted, owing to which a better stability is obtained by means of the device when the base of the lift platform is in a position inclined from the horizontal plane. It is quite a remarkable advantage that tilting of the working plane is possible within the whole range of operation and not only with the working plane raised.
  • the main parts of the lift platform in accordance with Figures 1 to 3 are the working plane 1, the base 2, the scissor-like articulated mechanism 3, and the tilting mechanism 4.
  • a vehicle frame is used as the base 2, but as a base, it is also possible to use, e.g., a separate auxiliary frame attached to the vehicle frame, a displaceable base provided with wheels or equivalent, or also a stationary, non-mobile base.
  • the scissor-like articulation mechanism 3 is quite a conventional scissor-like articulation mechanism, and it comprises a first pair of articulated arms 31 and a second pair of articulated arms 32, which are articulated with each other crosswise by means of a first articulated joint 33 placed at the middle of the said articulated arms 31 and 32.
  • the first articulated arms 31 are linked by their lower ends to the tilting mechanism 4 by means of a third articulated joint 35, and at the upper end of each first articulated arm 31 a first slide member 12 is mounted, which is fitted so as to run in a first guide 11 provided on the working plane 1.
  • each second articulated arm 32 is by its upper end linked to the working plane by means of a second articulated joint 34, and the lower ends of the second articulated arms 32 are provided with second slide members 22, which are fitted so as to run in horizontal second guides 21 mounted on the base.
  • the said slide members 12 and 22 may have the form of, e.g., a pin, roll, or equivalent, which are fitted to run along the guides 11 and 21.
  • the scissor-like articulated mechanism 3 is further provided with one or several lifting cylinders 36, whose bottom end is attached by means of an articulated joint, either directly or by the intermediate of fastening members, to the first articulated arms 31 within the area between the said first articulated joint 33 and the third articulated joint 35, and which said lifting cylinders 36 are, by the upper end, i.e. by the piston rod, attached by means of an articulated joint, either directly or by the intermediate of fastening members, to the second articulated arms 32 within the area between the said first articulated joint 33 and the second articulated joint 34.
  • the lifting cylinders 36 it is possible to use single-acting or double-acting hydraulic cylinders, and in the embodiment shown in the figures, the lifting cylinders 36 consist of telescopic cylinders, which provide large lifting height and require little space in the compressed state.
  • Figs. 1 to 3 it is shown further that there is only one scissor-like articulation mechanism 3 between the working plane 1 and the base 2. It is, however, obvious that in the device it is possible to use several scissor-like articulation mechanisms 3 placed one above the other, linked together in a way in itself known. In such a case, the topmost scissor-like articulation mechanism 3 is attached to the working plane 1 in the way described above, and the lowermost scissor-like articulation mechanism 3 is attached to the base 2 and to the tilting mechanism 4 in the way described above.
  • the tiltability of the lift platform has been achieved by means of the tilting mechanism 4, which comprises tilting arms 41, which are by one end attached to the base 2 by means of a fourth articulated joint 42 and which said tifting arms 41 are, by the opposite end, attached to the first articulated arms 31 by means of a third articulated joint 35.
  • the tilting arms 41 are arranged pivotable around the said fourth articulated joint 42 by means of tilting cylinders 43, which are by one end attached to the base 2 by means of an articulated joint and, by the opposite end, i.e. by the piston rod, attached to the tilting arms 41 by means of an articulated joint.
  • the working plane 1 is raised or lowered by means of the lifting cylinder 36, which is attached to the first and second articulated arms 31 and 32, constituting parts of the scissor-like articulated mechanism 3, in the way described above.
  • the movement of the lifting cylinder 36 forces the first and second articulated arms 31 and 32 to pivot relative each other around the first articulated joint 33, whereby the first slide members 12 placed at the upper ends of the first articulated arms 31 glide along the first guides 11 provided on the working plane 1, and correspondingly the second slide members 22 placed at the lower ends of the second articulated arms 32 glide along the second guides 21 placed in the base 2.
  • the upper ends of the articulated arms 31 and 32 are hereby raised or lowered, whereby the working plane 1, placed as supported on one of the articulated joints 34 and on one of the slide members 22 is raised or lowered.
  • the working plane 1 moves in the vertical direction being parallel to the base if the level of the third articulated joint 35 relative the base 2 is adjusted appropriately.
  • the position of the third articulated joint 35 relative the base 2 is correct for keeping the working plane 1 horizontal, i.e. in the vertical direction the said articulated joint 35 is placed at the same level with the second slide members 22 when the tilting arm 41 has been positioned by means of the tilting cylinder 43 parallel to the base 2, i.e. horizontal.
  • the tilting mechanism 4 is dimensioned so that, when the tilting arm 41 is horizontal, the piston rod of the tilting cylinder 43 has been pushed half a stroke out of the cylinder, whereby it is achieved that the tilting allowance of the working plane 1 is, from the horizontal position, equally large in both directions.
  • the working plane 1 is inclined by means of the tilting mechanism 4 as follows:
  • the piston rod of the tilting cylinder 43 displaces the tilting arm 41, whereby a pivoting of the third articulated joint 35, which interconnects the tilting arm 41 and the first articulated arm 31, around the fourth articulated joint 42, the tilting arm 41 constituting the radius for the said pivoting, produces a pivoting of the entire scissor-like articulated mechanism 3 around the second slide member 22, which is placed in the guide 21 and which is connected to the second articulated arm 32, whereby the working plane 1 is tilted.
  • the working plane 1 can be tilted in the longitudinal direction in both directions.
  • the working plane 1 is appropriately arranged so that it can be tilted in the longitudinal direction by 10° relative the base 2 in both directions.
  • the tilting allowance may, of course, also be larger than ⁇ 10°, but in most cases the said tilting allowance of ⁇ 10° is sufficient.
  • the stability of the equipment may constitute a problem if the tilting extent is considerably above 10°.
  • the tilting of the working plane 1 is performed by tilting the entire scissor-like articulated mechanism 3 of the lift platform. Tilting of the working plane 1 is possible within the whole working range of the lift platform, which has been achieved thereby that the lifting cylinders 36 and the tilting cylinders 43 have been arranged adjustable separately and independently from each other.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Claims (4)

1. Hebebühne, welche eine Arbeitsplattform (1), eine Basis (2) und wenigstens einen scherenartigen, gelenkigen Mechanismus (3) umfaßt, der die Arbeitsplattform (1) und die Basis (2) miteinander verbindet, wobei die Arbeitsplattform (1) im wesentlichen vertikal gegenüber der Basis (2) durch den Gelenkmechanismus (3) und wenigstens einen hydraulischen Hubzylinder (36) bewegbar ist, der mit diesem verbunden und auch gegenüber der Basis (2) in Längsrichtung kippbar ist, dadurch gekennzeichnet, daß ein erstes Paar von Gelenkarmen (31) der sich paarweise kreuzenden gelenkigen Armen des einzigen oder untersten scherenartig gelenkigen Mechanismus (3) an der Basis (2) mittels eines Schwenkmechanismus (4) angebracht ist, durch den die Arbeits-plattform (1) in Längsrichtung gegenüber der Basis (1) in beiden Lenkrichtungen durch Verschwenken des ganzen scherenartig gelenkigen Mechanismus (3) schwenkbar ist.
2. Hebebühne nach Anspruch 1, in der der Schwenkmechanismus (4) wenigstens einen Schwenkbarm (41) aufweist, der mit einem Ende an der Basis (2) mit Hilfe eines Schwenkpunktes (42) angebracht ist und der mit seinem entgegengesetzten Ende an dem genannten ersten Gelenkarm (31) mit Hilfe eines Gelenkpunktes (35) angebracht ist, und der Schwenkarm (41) so eingepaßt ist, daß er um den Gelenkpunkt (42) mit Hilfe eines Schwenkzylinders (43) zwischen dem Schwenkarm (41) und der Basis (2) schwenkbar ist.
3. Hebebühne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Hubzylinder (36) und der Schwenkzylinder (43) getrennt einstellbar sind, so daß die Arbeitsplattform innerhalb des gesamten Arbeitsbereiches schwenkbar ist.
4. Hebebühne nach irgendeinem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Ausmaß der Längsneigung der Arbeitsplattform (1) gegenüber der Basis (2) nicht größer als t10° ist.
EP86906341A 1985-11-12 1986-10-24 Hebebühne Expired - Lifetime EP0245328B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI854449A FI72105C (fi) 1985-11-12 1985-11-12 Lyftbar plattform.
FI854449 1985-11-12

Publications (2)

Publication Number Publication Date
EP0245328A1 EP0245328A1 (de) 1987-11-19
EP0245328B1 true EP0245328B1 (de) 1990-01-17

Family

ID=8521670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86906341A Expired - Lifetime EP0245328B1 (de) 1985-11-12 1986-10-24 Hebebühne

Country Status (5)

Country Link
EP (1) EP0245328B1 (de)
DE (1) DE3668313D1 (de)
ES (1) ES2003500A6 (de)
FI (1) FI72105C (de)
WO (1) WO1987002974A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229799A1 (de) * 1992-09-09 1994-03-10 Haller Gmbh Fahrzeugbau Wechselaufbausystem für Müllsammelfahrzeuge
RU173805U1 (ru) * 2017-03-15 2017-09-12 федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный аграрный университет" (ФГБОУ ВО Волгоградский ГАУ) Грузоподъемный стол
WO2019051325A1 (en) * 2017-09-07 2019-03-14 Todd Humbert LIFTING AND INCLINATION SUPPORT APPARATUS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1305878A (de) * 1971-05-24 1973-02-07
DE2246868C3 (de) * 1972-09-23 1980-01-03 Karl Mengele & Soehne Maschinenfabrik Und Eisengiesserei Gmbh & Co, 8870 Guenzburg Fahrzeug mit einem Hub- und Kippgerät

Also Published As

Publication number Publication date
FI72105C (fi) 1987-04-13
ES2003500A6 (es) 1988-11-01
FI854449A0 (fi) 1985-11-12
WO1987002974A1 (en) 1987-05-21
DE3668313D1 (de) 1990-02-22
FI72105B (fi) 1986-12-31
EP0245328A1 (de) 1987-11-19

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