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EP0698575A1 - Elévateur, en particulier pour véhicules automobiles - Google Patents

Elévateur, en particulier pour véhicules automobiles Download PDF

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Publication number
EP0698575A1
EP0698575A1 EP95113417A EP95113417A EP0698575A1 EP 0698575 A1 EP0698575 A1 EP 0698575A1 EP 95113417 A EP95113417 A EP 95113417A EP 95113417 A EP95113417 A EP 95113417A EP 0698575 A1 EP0698575 A1 EP 0698575A1
Authority
EP
European Patent Office
Prior art keywords
levers
lifting
cylinder units
lifting cylinder
lifting platform
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
EP95113417A
Other languages
German (de)
English (en)
Other versions
EP0698575B1 (fr
Inventor
Frank Thielow
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.)
Autop Maschinenbau GmbH
Original Assignee
PERKUTE Maschinenbau GmbH
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
Priority claimed from DE19505366A external-priority patent/DE19505366A1/de
Application filed by PERKUTE Maschinenbau GmbH filed Critical PERKUTE Maschinenbau GmbH
Publication of EP0698575A1 publication Critical patent/EP0698575A1/fr
Application granted granted Critical
Publication of EP0698575B1 publication Critical patent/EP0698575B1/fr
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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
    • 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
    • B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
    • B66F7/20—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by several jacks with means for maintaining the platforms horizontal during movement

Definitions

  • the invention relates to a lifting platform for loads, in particular for motor vehicles, with at least one pair of hydraulic lifting cylinder units, the extendable parts of which are each provided with a receiving member for the load to be lifted, and with a synchronizing device for the lifting of the two cylinder units, which has a mechanical connecting member, via which the extendable parts of the lifting cylinder units are connected to one another.
  • mechanical synchronizing devices In addition to known synchronous devices which act in terms of circuitry on the hydraulic drives of the lifting cylinder units of a lifting platform, mechanical synchronizing devices have still proven to be suitable and reliable, particularly in motor vehicle lifting platforms. In the case of mechanical synchronous devices, the synchronous and coordinated extension of the lifting cylinder units is achieved in that the extendable parts of these cylinder units are connected to one another by mechanical-structural means.
  • the invention has for its object to provide a lifting platform of the type mentioned with a mechanical synchronizing device, which on the one hand guarantees a low design effort, on the other hand, sufficient synchronism without generating excessive bending moments in the mechanical connecting link, which leads to tilting movements between the piston rod and Guide the cylinder housing or cylinder housing and cylinder guide.
  • the invention would in principle also be applicable to lifting platforms which have more than one pair of lifting cylinder units, each pair being to be connected by levers according to the invention, but moreover the rare pieces could also be connected to one another by levers according to the invention however, on motor vehicle lifts which have only a pair of lifting cylinder units, these two lifting cylinder units being arranged completely independently and carrying mutually independent receiving members for the load, apart from the constant-speed lifting device, which is necessary precisely because the cylinder units are two independent extension supports acts.
  • underfloor lifts a main area of application for the invention is so-called underfloor lifts, although the invention is also applicable to lifts in a different arrangement.
  • the lifting cylinder units are sunk in a pit in the ground and the receiving members for the load are located at the upper ends of the extendable parts of the lifting cylinder units, which are then extended through openings in the pit cover above ground level to lift, for example, a motor vehicle previously driven over them .
  • These underfloor lifts have their peculiarity in that the basic aim is that only an extendable part of cylindrical cross-section should be moved easily sealable through a corresponding opening in the pit cover when lifting, and that all other construction elements, including in particular those, should be lifted for the synchronization device, remain inside the pit.
  • the articulated connection between the two levers, which are rigidly connected to the extendable parts of the lifting cylinder units, can be designed differently. What is essential is the articulated connection around an axis that runs horizontally and perpendicular to the plane that contains the two cylinder axes in order to reduce the transfer of the internal bending moments from one lever to the other.
  • a further embodiment additionally provides a possibility of pivoting the levers about an axis which runs parallel to the axes of the lifting cylinder units. This makes it possible for the hinge point to no longer lie on a direct connecting line between the cylinder axes, but outside a plane which runs through the cylinder axes, as a result of which the levers form an obtuse-angled triangle with the imaginary direct connection between the cylinder axes.
  • the articulation itself can also be designed in such a way that it allows a certain amount of change in length in the direction of the levers in order to allow a certain adjustment to the distance between the cylinder units.
  • levers themselves can also be designed to be telescopically extendable, so that they can be adapted to different cylinder distances, which means that the variety of components can be reduced for lifting platforms of different widths.
  • the levers are expediently made from a rigid profile, which in particular has a high bending resistance in a vertical plane, in which the synchronization adjustment forces have an effect.
  • the cross section of the levers can be tapered from their starting attachment points on the lifting cylinder units to the articulation point, since the greatest bending moments that may occur occur at the attachment points of the levers on the cylinder units.
  • lifting cylinder units two types are known, namely those in which the piston rod is attached to the floor with a base and the cylinder housing is the extendable part which moves up or down along the piston rod and those in which the cylinder housing is on the floor is attached and the piston rod extends upwards.
  • Lifting cylinder units with multiple pistons or concentric piston-cylinder arrangements are also known, but in the end they can also be classified into these two groups.
  • FIG. 1 A two-post underfloor lifting platform for motor vehicles is shown in FIG. It can be used as a complete unit in a correspondingly excavated, narrow pit and therefore has a base plate 2, side walls 4 and a cover plate or pit cover 6.
  • two lifting cylinder units 8 Arranged in the frame or housing designed in this way are two lifting cylinder units 8, the piston rods 10 of which are supported with their base points on the base plate 2.
  • two cylinder housings 12 Surrounding the piston rods 10 and displaceable in the longitudinal direction thereof or extendable upwards, two cylinder housings 12 are provided.
  • the cylinder housing 12 can be extended above floor level through two sealingly fitting openings 14 by a guide in the area of the pit cover 6.
  • the cylinder housings 12 have at their upper ends load-bearing members 16 for supporting a motor vehicle, which in the exemplary embodiment are also provided with swivel arms 18. The exact design of these load suspension elements depends on the special application of the lift.
  • a lever 20 is rigidly attached to the lower end of each cylinder housing 12.
  • the ends of both levers meet in the middle between the two lifting cylinder units 8 and are connected to one another there by a joint 22.
  • the levers 20 have a U-shaped cross-sectional profile which is open at the top and which has a considerable bending resistance in the vertical direction.
  • the levers 20 are tapered from their start attachment to the cylinder housings 12 starting from the common pivot point 22. This training contributes to Bending moment decreasing towards the joint point under load and thus leads to material savings or lighter components.
  • the joint 22 is designed as a joint with a degree of freedom of movement in the plane of the cylinder axes.
  • This joint is shown in detail in FIG. 2, namely in an exploded view.
  • a joint piece 26 is firmly clamped into the end 24 of a left lever 20.
  • This joint piece 26 has a central joint section 28 with cylindrically curved bearing surfaces 30, the curvature axis of which extends in the horizontal direction.
  • An extension 32 with a rectangular cross-section adjoins the central joint section 28 in the direction of a right lever 20, which in the exemplary embodiment has the same width in the horizontal direction as the joint section 28, but has a smaller thickness in the vertical direction than the latter.
  • the end 34 of the right lever 20 has a U-shaped guide cross section, which can be screwed to a rectangular guide channel 38 with a cover plate 36.
  • the joint piece 26 can be inserted into this guide channel 38, the height of the guide channel 38 corresponding to the thickness of the joint section 28 of the joint piece 26, so that its bearing surfaces 30 come into approximately linear contact with the upper and lower limits of the guide channel 38.
  • the extension 32 of the joint piece 26 is fitted in its width in the guide channel 38, but its thickness in the vertical direction is less than the height of the guide channel 38, which is open at the top behind the cover plate 36 anyway.
  • the joint piece 26 with its joint section 28 is axially displaceable in the direction of the levers 20 in the guide channel 38, as a result of which the lever arrangement can adapt to inaccuracies in the distance between the cylinders.
  • the extension 32 of the joint piece 26, however, acts in this embodiment as a torque arm, which prevents pivoting of the levers against each other in a horizontal plane.
  • the possible deflection angle of the levers 20 in relation to one another in a vertical plane need not be very large, so that the geometry shown in FIG. 2 offers sufficient scope for deflection.
  • FIG 3 a joint between levers 20 in an exploded view in vertical section is shown in a schematic representation, which is designed as a ball joint.
  • the end 40 of a left lever 20 is provided with an articulated head 42 which has a cylindrical base body 44, the end faces of which are each provided with a spherical cap 46.
  • the end 48 of a right lever 20 has two ball sockets 50 as a seat for the spherical caps 46 of the lever end 40. Due to this partially spherical mounting, the levers can be pivoted relative to one another to a limited extent in several planes, so that the pivot point between the levers 20 can be deflected in a horizontal plane.
  • the lateral deflection of the articulation point enables adaptation of the synchronous connection consisting of the two levers 20 to dimensional deviations which can result from inaccuracies in the assembly of the lifting cylinder units 8.
  • FIG. 4 shows a joint in which pivoting of the levers 20 about the axes of the lifting cylinder units 8 is to be suppressed.
  • the levers 20 have a fork 52 or a tab 54, which can be plugged into one another, wherein they touch flat guide surfaces 56 extending along the axes of the lifting cylinder units 8.
  • Fork 52 and tab 54 have bores 58 and 60 into which a bolt 62 is perpendicular to the Guide surfaces 56 is inserted. This construction limits the pivoting movement of the arms 20 about the axes of the lifting cylinder units 8 to the manufacturing and temperature-related tolerances between the contact surfaces 56.
  • the bore 60 in the bracket 54 is designed as an elongated hole, so that the ends of the levers 20 are movable relative to one another in the direction of their longitudinal extent.
  • the elongated hole formation can alternatively also be carried out on the fork 52.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Handcart (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
EP95113417A 1994-08-26 1995-08-26 Elévateur, en particulier pour véhicules automobiles Expired - Lifetime EP0698575B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4430419 1994-08-26
DE4430419 1994-08-26
DE19505366 1995-02-17
DE19505366A DE19505366A1 (de) 1994-08-26 1995-02-17 Hebebühne, insbesondere für Kraftfahrzeuge

Publications (2)

Publication Number Publication Date
EP0698575A1 true EP0698575A1 (fr) 1996-02-28
EP0698575B1 EP0698575B1 (fr) 1999-11-17

Family

ID=25939566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113417A Expired - Lifetime EP0698575B1 (fr) 1994-08-26 1995-08-26 Elévateur, en particulier pour véhicules automobiles

Country Status (3)

Country Link
EP (1) EP0698575B1 (fr)
AT (1) ATE186708T1 (fr)
DE (1) DE29508251U1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19824081C2 (de) * 1998-05-29 2001-09-13 Autoperkute Maschb Gmbh Hubvorrichtung, insbesondere Hebebühne für Kraftfahrzeuge
DE202007002790U1 (de) 2007-02-22 2008-06-26 Autop Maschinenbau Gmbh Gleichlaufeinrichtung für Hubvorrichtungen
DE102008017889B4 (de) * 2008-04-09 2021-07-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Abnahmestation zur Entnahme eines Personenkraftwagens aus einem Ladungsträger
DE102009029718A1 (de) * 2009-06-16 2010-12-30 Winkel Gmbh Palettenaufgabestation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279562A (en) 1964-07-17 1966-10-18 Dover Corp Equalizer for a vehicle lift
SU1337343A1 (ru) * 1986-04-24 1987-09-15 Государственный Проектно-Конструкторский И Технологический Институт "Индустройпроект" Подъемник
DE8907280U1 (de) 1989-06-14 1989-07-27 Slift Hebezeug GmbH, 7533 Tiefenbronn Hebebühne
DE3824563A1 (de) * 1988-07-19 1990-02-08 Delu Luftkissen Verfahren und einrichtung zum anheben und abstuetzen schwerer grossraeumiger lasten, insbesondere von schienengebundenen wagons auf mehreren vorgegebenen arbeitshoehen
EP0449055A2 (fr) 1990-03-29 1991-10-02 Franz Hörnstein GmbH & Co. KG Elévateur pour véhicules automobiles
EP0461638A1 (fr) * 1990-06-15 1991-12-18 Slift Hebezeug Gmbh Dispositif de synchronisation pour une plate-forme de levage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008626A1 (de) * 1979-03-06 1980-09-11 Pedersen H E H Wagenheber
DE9102833U1 (de) * 1990-03-24 1991-05-29 Slift Hebezeug GmbH, 7533 Tiefenbronn Hebebühne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279562A (en) 1964-07-17 1966-10-18 Dover Corp Equalizer for a vehicle lift
SU1337343A1 (ru) * 1986-04-24 1987-09-15 Государственный Проектно-Конструкторский И Технологический Институт "Индустройпроект" Подъемник
DE3824563A1 (de) * 1988-07-19 1990-02-08 Delu Luftkissen Verfahren und einrichtung zum anheben und abstuetzen schwerer grossraeumiger lasten, insbesondere von schienengebundenen wagons auf mehreren vorgegebenen arbeitshoehen
DE8907280U1 (de) 1989-06-14 1989-07-27 Slift Hebezeug GmbH, 7533 Tiefenbronn Hebebühne
EP0449055A2 (fr) 1990-03-29 1991-10-02 Franz Hörnstein GmbH & Co. KG Elévateur pour véhicules automobiles
EP0461638A1 (fr) * 1990-06-15 1991-12-18 Slift Hebezeug Gmbh Dispositif de synchronisation pour une plate-forme de levage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET PATENTS ABSTRACTS Week 8815, 14 April 1988 Derwent World Patents Index; AN 88-104337 *

Also Published As

Publication number Publication date
EP0698575B1 (fr) 1999-11-17
DE29508251U1 (de) 1995-09-28
ATE186708T1 (de) 1999-12-15

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