WO1994024036A1 - Elevateur de vehicules du type pantographe - Google Patents

Elevateur de vehicules du type pantographe Download PDF

Info

Publication number
WO1994024036A1
WO1994024036A1 PCT/EP1994/001124 EP9401124W WO9424036A1 WO 1994024036 A1 WO1994024036 A1 WO 1994024036A1 EP 9401124 W EP9401124 W EP 9401124W WO 9424036 A1 WO9424036 A1 WO 9424036A1
Authority
WO
WIPO (PCT)
Prior art keywords
uprights
pair
motor vehicle
cylinder
vehicle lift
Prior art date
Application number
PCT/EP1994/001124
Other languages
English (en)
Inventor
Eride Rossato
Original Assignee
Eride Rossato
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 Eride Rossato filed Critical Eride Rossato
Priority to AU65673/94A priority Critical patent/AU6567394A/en
Publication of WO1994024036A1 publication Critical patent/WO1994024036A1/fr

Links

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
    • B66F7/065—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
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated

Definitions

  • This invention relates to a motor vehicle of pantograph type.
  • Motor vehicle lifts comprising a pair of
  • the two runways are connected, by pairs of uprights associated with cylinder-piston lifting units, to two longitudinal members resting on or embedded in the ground.
  • vehicle lifts of pantograph type are- 10 known, so called because the uprights therein cross each other to form with the longitudinal members and runways two articulated pantograph structures.
  • the hydraulic cylinder-piston lifting units are generally interposed •J-5 between the base longitudinal members and the uprights or between the uprights and the runways, and operated by extending.
  • the force which each of them 20 has to develop in order to raise the lift is very high and requires them to be adequately sized, and in particular to have a considerable diameter.
  • the result is that when at ground level they occupy considerable space (not less than 30 mm) and ramps are required to enable the vehicle to be driven onto the runways.
  • lifts of pantograph type require a high operating pressure and hence a large motor to operate the pump feeding the operating liquid into the cylinder-piston lifting units.
  • a further drawback is that the speed with which the lift rises, related to the power which the lifting system is able to develop, is greater the greater the size of the cylinder- piston units, however for the aforesaid reasons the tendency ' is to limit this size as much as possible, with the result that the speed with which the lift rises is unsatisfactory, this representing a serious limitation especially in vehicle service centres in which the large number of vehicles to be checked daily means that their lifting speed should be high.
  • these measuring instruments would require the lift to have a height which is actually less than the height of a lowered lift, however as they are mounted on the runways, which in any event must have a certain minumum height from the ground, the overall height of the lowered lift is always greater than the minimum height actually required by these instruments.
  • Vehicle lifts of pantograph type embedded in the ground have been proposed, ie with their base longitudinal members housed in suitable compartments provided in the floor, so that the runways are at ground level when lowered.
  • This * virtually eliminates the space problem of the lowered lift, but requires costly underground work which practically absorbs in terms of cost the space advantages which the method provides.
  • An object of the invention is to provide a motor vehicle lift of pantograph type which when in its lowered state occupies a very small space, which is considerably less than that of conventional vehicle lifts.
  • a further object of the invention is to provide a vehicle lift which although of small overall size when in its lowered state, is able to rise and descend with high speed.
  • a further object of the invention is to provide a vehicle lift which enables this raising and lowering speed to be very easily and reliably adjusted.
  • a further object of the invention is to provide a vehicle lift of pantograph type which does not require high pressure for its raising, so on the one hand requiring small diameter pistons of small overall space requirement, and on the other hand requiring a low power motor for operating the pump feeding the operating liquid into the cylinder-piston units.
  • Figure 1 is a partly sectional side schematic view of a
  • Figure 4 is an enlarged detailed view of a cylinder-piston lifting unit for the lift;
  • Figure 5 is a vertical section therethrough on the line V-V of Figure 4;
  • Figure 6 is a vertical section therethrough on the line VI-VI of Figure 4;
  • Figure 7 is a vertical section therethrough on the line VII- VII of Figure 4.
  • the vehicle lift according to the invention is a lift of pantograph type, with two base longitudinal members 2 resting on the ground or housed in suitable seats provided therein.
  • Two uprights, indicated overall by 4 and 6, are associated with each longitudinal member 2 to connect the longitudinal member to an overlying runway 8.
  • each upright 4 is lowerly hinged to the respective longitudinal member 2 and upperly slidable along the lower surface of the respective
  • each upright 6 is upperly hinged to the respective runway 8 and is lowerly slidable along the upper surface of the respective longitudinal member 2.
  • the two uprights 4 and 6 of each pair which are generally pivoted together on pins 10, each consist of two parallel arms, which in the case of the uprights 6 are internal and slidable via their lower end provided with rollers 12 on the respective longitudinal members, and in the case of the uprights 4 are external and hinged to said longitudinal members, said uprights being connected together at ground level by a tubular shaft 14 forming a torsion bar.
  • Two parallel section pieces 30 extending on the outside of the cubic block 16 are applied to the carriage 24 and are connected together at their opposite end by an annular element 32 of rectangular cross-section which is free to slide on the cylindrical body 18.
  • Two bars 36, pivoted on two lateral pins 34 fixed to the upper section piece 30, carry on their lower edge sawtooth toothing cooperating with corresponding toothing provided on the upper edge of plates 38 fixed to the side of the cylindrical body 18.
  • the two bars 36 can be made to rotate simultaneously about the respective pins 24 under the control of a pneumatic cilinder-piston unit 40 shown schematically in Figure 4.
  • the two cylinder-piston units 20 can be connected to a ' conventional hydraulic centre (not shown on the drawings) provided with a pump driven by an electric motor and able to feed them with oil under pressure.
  • the vehicle lift according to the invention operates as follows: when the lift is in its lowered state (see Figure 1) the runways 8 cover the respective longitudinal members 2 and because of their C-shaped cross-section enclose the folded uprights 4 and 6 and the relative cylinder-piston units 20, which are in their maximum elongation condition.
  • the uprights when in this configuration the uprights can be virtually parallel, meaning that the overall dimensions are at minimum such as to enable the usual safety plates 42 of the runways 8 to also form the ramps for driving the vehicle onto the lift.
  • the guides 28,28*' are profiled, this profile being such that for equal movement of the carriage 24, during the initial part of its travel the raising of the runways takes place with a certain slowness, to increase gradually and then remain constant until maximum height is attained.
  • the annular element 32 rigid with the carriage 24 via the section pieces 30, slides on the cylindrical body 18 such that its toothed bar 36 slides on the respective toothed plate 38, this being allowed by the arrangement of the mutually engaging teeth. In this manner a mechanical safety system is achieved ensuring the stability of the position attained by the runways, even if the hydraulic lifting system should accidentally fail.
  • the mechanical safety system To lower the vehicle lift the mechanical safety system must firstly be deactivated, this being done by raising the vehicle lift very slightly, sufficient to slightly disengage the toothed bars 36 from the respective toothed plates 38, ' then causing total disengagement by rotating the toothed bars 36 about the respective horizontal pins 34. This rotation is achieved, as stated, by a pneumatic cylinder-piston unit 40 or by magnetic systems, etc..
  • the cylinder-piston units 20 are set to discharge so that the weight of the vehicle and of the raised parts of the vehicle lift cause the oil to escape from the cylindrical bodies 18.
  • the profile of the guides 28,28*" causes the descent to commence with a certain speed, to then decelerate during the final part with programmed gradualness.
  • the deactivation of the mechanical safety systems and the opening of the discharge solenoid valves for the cylinder-piston units 20 are preferably effected in an automatic sequence as the result of a single command fed by the operator.
  • the vehicle lift according to the invention is particularly advantageous compared with conventional vehicle lifts of pantograph type, and in particular:
  • the hinged safety plates normally provided on the runways can be used as the access rar ps.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

Un élévateur de véhicules du type pantographe est constitué d'une paire d'éléments longitudinaux (2) destinés à être fixés au sol, d'une paire de chemins de roulement relevables (8) sur lesquels le véhicule est placé, d'une paire de montants (4, 6) reliés en leur centre par une articulation et reliant chaque élément longitudinal (2) à un chemin de roulement (8) situé au-dessus, et d'au moins une paire d'organes de levage à piston-vérin (20), le corps cylindrique (18) d'un organe à piston-vérin (20) à axe horizontal étant associé à la broche (10) reliant de manière articulée les deux montants (4, 6) de chaque paire. La tige (22) de l'organe à piston-vérin est dotée de moyens (24, 26) coulissant le long desdits montants (4, 6) et coopérant avec des guides profilés (28, 28') appliqués sur ces derniers de sorte que lesdits montants divergent et soulèvent les chemins de roulement (8).
PCT/EP1994/001124 1993-04-16 1994-04-12 Elevateur de vehicules du type pantographe WO1994024036A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU65673/94A AU6567394A (en) 1993-04-16 1994-04-12 Motor vehicle lift of pantograph type

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT93VE000010A IT1268489B1 (it) 1993-04-16 1993-04-16 Ponte sollevatore a pantografo per autoveicoli
ITVE93A000010 1993-04-16

Publications (1)

Publication Number Publication Date
WO1994024036A1 true WO1994024036A1 (fr) 1994-10-27

Family

ID=11423917

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/001124 WO1994024036A1 (fr) 1993-04-16 1994-04-12 Elevateur de vehicules du type pantographe

Country Status (3)

Country Link
AU (1) AU6567394A (fr)
IT (1) IT1268489B1 (fr)
WO (1) WO1994024036A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107587539A (zh) * 2017-10-09 2018-01-16 冯云鹏 一种建筑施工用地基高效平整装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055514A (en) * 1960-07-26 1962-09-25 Lamb Grays Harbor Co Inc Fork lift type bale stacker
FR1383677A (fr) * 1964-03-05 1964-12-24 Geilinger & Co Plateforme élévatrice
US3556481A (en) * 1969-01-23 1971-01-19 Mcneil Corp Air-operated scissors-type jack
US3901356A (en) * 1972-03-15 1975-08-26 Bear Manufacturing Corp Lift mechanism
DE7932713U1 (de) * 1979-11-20 1981-03-12 Heide, Carsten, 4800 Bielefeld Hubvorrichtung
US5012898A (en) * 1988-09-15 1991-05-07 Hunter Engineering Company Control system for vehicle lift racks

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055514A (en) * 1960-07-26 1962-09-25 Lamb Grays Harbor Co Inc Fork lift type bale stacker
FR1383677A (fr) * 1964-03-05 1964-12-24 Geilinger & Co Plateforme élévatrice
US3556481A (en) * 1969-01-23 1971-01-19 Mcneil Corp Air-operated scissors-type jack
US3901356A (en) * 1972-03-15 1975-08-26 Bear Manufacturing Corp Lift mechanism
DE7932713U1 (de) * 1979-11-20 1981-03-12 Heide, Carsten, 4800 Bielefeld Hubvorrichtung
US5012898A (en) * 1988-09-15 1991-05-07 Hunter Engineering Company Control system for vehicle lift racks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107587539A (zh) * 2017-10-09 2018-01-16 冯云鹏 一种建筑施工用地基高效平整装置

Also Published As

Publication number Publication date
AU6567394A (en) 1994-11-08
ITVE930010A1 (it) 1994-10-16
IT1268489B1 (it) 1997-03-04
ITVE930010A0 (it) 1993-04-16

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