EP0704404A1 - Plate-forme de levage - Google Patents

Plate-forme de levage Download PDF

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Publication number
EP0704404A1
EP0704404A1 EP95115101A EP95115101A EP0704404A1 EP 0704404 A1 EP0704404 A1 EP 0704404A1 EP 95115101 A EP95115101 A EP 95115101A EP 95115101 A EP95115101 A EP 95115101A EP 0704404 A1 EP0704404 A1 EP 0704404A1
Authority
EP
European Patent Office
Prior art keywords
lifting
lifting member
guide
table according
lift table
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
EP95115101A
Other languages
German (de)
English (en)
Other versions
EP0704404B1 (fr
Inventor
Peter Ekkehard Heinrichs
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0704404A1 publication Critical patent/EP0704404A1/fr
Application granted granted Critical
Publication of EP0704404B1 publication Critical patent/EP0704404B1/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
    • 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

Definitions

  • the invention relates to a lifting table according to the preamble of claim 1.
  • a lifting table is known for example from DE-GM 90 05 566.7.
  • Known lifting tables for example scissor lifting tables, are used in many fields in industrial production, for example in vehicle construction and also in transportation, in order to raise and lower workpieces or other goods.
  • high load capacity based on the respective size, safe parallel guidance of the table top and a drive that is as jerk-free as possible, it is also important with such lifting tables to keep the height as low as possible in the lowered state so that no special pits are required at the installation site.
  • the invention is therefore based on the object of providing a lifting table which enables rapid lifting and lowering movements with little motor and structural outlay, has a low overall height in the lowered state and does not require a hydraulic drive.
  • the solution to the problem is characterized in claim 1.
  • the circular segment-shaped lifting member can have a large arc length despite a low overall height, which is advantageous as a stroke and control system and at the same time allows a high translation in a simple manner, for example in that the circular segment is designed as a rack that meshes with a driven pinion .
  • the drive for example using a worm drive
  • self-locking results, so that the lifting table is secured against falling even in the event of a power failure.
  • a favorable movement diagram results, in which the lifting movement starts slowly, then takes place with increasing speed and finally slows down again when the maximum lifting height is reached. This enables gentle lifting and lowering despite the high speed.
  • the guide of the lifting member can comprise two pairs of rollers or rollers, which are arranged at a distance and are preferably mounted in the base frame and which grip a circular segment-shaped rail on the outside and inside, which contains the circular segment surface.
  • the guide of the lifting member can also contain two pairs of rollers or rollers arranged at a distance from the lifting member, which capture a circular segment-shaped rail, preferably fixedly arranged in the base frame, with the same radius as the lifting member from the outside and inside, or as individual rollers or rollers in a groove run on the rail.
  • the lifting member can be driven in many ways.
  • a further development of the invention provides that the drive takes place by means of at least one toothing arranged on the circular segment surface of the lifting member and in each case a meshing pinion, preferably mounted in the base frame and driven by a motor.
  • the toothing can also be a rack gear toothing.
  • a modification provides that the drive takes place by means of at least one drive chain arranged on the circular segment surface and in each case a chain wheel which meshes with it and is preferably mounted in the base frame and driven by a motor.
  • the drive chain can be deflected around the sprocket with guide rollers and is attached to the beginning and end of the lifting member.
  • the table top can be guided in a manner known per se with at least one pair of scissors, the arms of which are rotatably mounted at one end in the base frame or on the table and are displaceably mounted at their other end in a slot in the table or the base frame. It is expedient to have one end of the lifting member slidably engage that end of the scissor arm which is rotatably mounted on the table. This also results in a translation from the lifting movement of the lifting member to the lifting movement of the table top.
  • the lifting device can have at least two lifting segments in the form of segments of a circle, which are arranged in opposite directions and each slidably engage with one end at opposite ends of the table top.
  • the lifting movement is transmitted directly to both ends of the table top, which leads to high efficiency and high stability.
  • a parallel guidance of the table top is forced.
  • the additional stabilization in the horizontal direction can in turn be carried out using one or more scissors.
  • the ends of the lifting members engaging on the table top have two opposing racks are connected, which mesh with a gear on opposite sides, which is freely supported on the table top.
  • a tensioned revolving chain can also be provided on the table top, the upper run of which is connected to one lifting member and the lower run of which is connected to the other lifting member.
  • a table top 2 is supported at both ends and on both sides by two scissors 3 (only one is visible), each of which has two arms or bars 3a and 3b connected in the middle by an axis 4.
  • the bars 3a are rotatably supported at one end of the table top 2 at 5 and slide in the slots 6 of the base plate 1 at the other end. Accordingly, the other arms or bars 3b are pivoted at one end at 7 in the base plate 1 and slide at the other end in a slot 8 of the table top 2.
  • the table top 2 is raised and lowered using a lifting segment (viewed from the side) 9, which is designed in the exemplary embodiment as a truss.
  • a lifting segment (viewed from the side) 9, which is designed in the exemplary embodiment as a truss.
  • a single "half" lifting member 9 can be provided which engages a pair of scissors 3, but two identical lifting members 9 are preferred on both scissors 3.
  • a total of eight rollers then serve to guide the lifting members 9, two of which are pairs in the Drawing are shown, namely the pairs of rollers 10a, 10b and 11a, 11b mounted at a distance in the base frame 1.
  • the rollers 10a, 11a run on the inside of circular rails 9a of the lifting member 9 and the rollers 10b, 11b on the outside.
  • the lifting member 9 has a toothing 12, in which a pinion 13 engages, which is supported coaxially with the roller 10b.
  • the pinion is driven by a motor (not shown), preferably a regulated electric motor with a motor brake.
  • the lifting member 9 engages with two rollers 14 (arranged one behind the other in the drawing) into the grooves 15 provided on the bars 3a.
  • the pairs of rollers 10a, 10b, 11a, 11b can each be replaced by so-called curved guides, which contain balls or rollers as guide elements and are commercially available as components.
  • the lifting member 9 is driven by the pinion 13 and moved from the position shown in FIG. 2 in the direction of the position shown in FIG. 1 or vice versa.
  • the lifting member 9 assumes a position in which the two ends of the rail 9a can be at the same height. Since the radius of the circular segment-shaped lifting member 9 and its rail 9a is chosen to be as large as possible, the height of the lifting member 9 and thus the total height of the lifting table in the lowered position is relatively small.
  • the table top 2 is raised or lowered in the present case by two counter-rotating lifting members 9.
  • the two lifting members 9 engage with their pairs of rollers 14 directly into slots or grooves 25 of the table top 2.
  • the lifting members interlock as shown in FIG. 5.
  • the two halves of the lifting member 9 are arranged on the outside and on the right on the inside of the table top 2 and the base plate 2, so that they lie one inside the other when the table top 2 is lowered.
  • the pinion 13 is driven by worm gear 16 and a common electric motor 17 with a motor brake.
  • the worm gear 16 are self-locking, so that the table top 2 remains safely in any position.
  • the table top 2 is guided parallel to the base plate 1 at any height, so that an additional parallel guide by scissors as in the embodiment of FIGS. 1 and 2 is not required.
  • the table top 2 could slip in intermediate positions in the horizontal direction, because then the pairs of rollers 14 stand in the middle of the groove guides 25 and thus do not give lateral support.
  • two constructions according to FIGS. 4 and 6 are described below.
  • two rods 18 are articulated to the ends of the lifting members 9 provided with the roller pairs 14, each of which merges into a rack 19 in the region of the center of the table top 2.
  • the two toothed racks 19 mesh on opposite sides with a toothed wheel 20 that is freely supported on the table top 1. In this way, complete and secure guidance of the table top 2 is achieved.
  • two sprockets 21 are supported on the table top 2, over which a revolving chain 22 is stretched.
  • the lifting member 9 shown on the left is connected to the upper run of the chain 22 at 23 and that right link 9 with the lower run of the chain 22 at 24.
  • the lifting member 9 has a table support shape with a curved lower flange and a straight upper flange. This design is not binding; shapes with an inward or outward curved upper flange can also be selected. Solid wall girders are also possible. Furthermore, the lifting member 9 can also have supporting surfaces which, in the working position of the lifting table, interact with corresponding supporting surfaces of the drive and relieve the tooth flanks or the chain links.
  • the drive of the gear 13 or the corresponding sprocket does not need to be done directly via an electric motor; it is also possible to use an intermediate gear that generates desired movements, e.g. a sinusoidal lifting and lowering movement.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Machine Tool Units (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Magnetic Heads (AREA)
  • Inorganic Insulating Materials (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
EP95115101A 1994-09-28 1995-09-26 Plate-forme de levage Expired - Lifetime EP0704404B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9415656U 1994-09-28
DE9415656U DE9415656U1 (de) 1994-09-28 1994-09-28 Hubtisch

Publications (2)

Publication Number Publication Date
EP0704404A1 true EP0704404A1 (fr) 1996-04-03
EP0704404B1 EP0704404B1 (fr) 1998-12-23

Family

ID=6914236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115101A Expired - Lifetime EP0704404B1 (fr) 1994-09-28 1995-09-26 Plate-forme de levage

Country Status (3)

Country Link
EP (1) EP0704404B1 (fr)
DE (2) DE9415656U1 (fr)
ES (1) ES2126825T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29607020U1 (de) * 1996-04-18 1996-08-14 Expert Maschinenbau Gmbh, 64653 Lorsch Scheren-Hubtisch
US20140103277A1 (en) * 2012-10-15 2014-04-17 Cameron Lanning Cormack Hybrid Wedge Jack/Scissor Lift Lifting Apparatus and Method of Operation Thereof
CN107176540A (zh) * 2017-06-06 2017-09-19 北京航天发射技术研究所 一种用于大吨位货物转运的对接装置
WO2019153086A1 (fr) * 2018-02-07 2019-08-15 Terracube International Inc. Table élévatrice et procédé d'utilisation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106144942B (zh) * 2015-04-10 2018-11-23 深圳市裕展精密科技有限公司 顶升机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2201179A (en) * 1938-11-26 1940-05-21 Makaroff Automobile lift
DE1082023B (de) * 1958-12-06 1960-05-19 Ingo Trepel Hebetisch mit Nuernberger Schere
FR1524844A (fr) * 1967-05-30 1968-05-10 J E Greiner Company Procédé et appareil pour le garage des avions dans les aéroports
FR1562515A (fr) * 1967-04-24 1969-04-04
DE9217366U1 (de) * 1992-12-18 1994-01-27 Wegmann & Co Gmbh, 34127 Kassel Scherenhubtisch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH234846A (de) * 1941-02-20 1944-10-31 Otto Dr Becker Alfred Hebevorrichtung.
FR2281310A1 (fr) * 1974-08-05 1976-03-05 Thaon Maurice Commande d'appareil elevateur
GB1487119A (en) * 1975-05-21 1977-09-28 Hydraulmekano Ab Lifting devices
DD252814A1 (de) * 1986-09-29 1987-12-30 Smab Forsch Entw Rat Scherenhubtisch
DE9406480U1 (de) * 1994-04-15 1994-06-16 Laweco-Maschinen- und Apparatebau GmbH, 32339 Espelkamp Scherenhubtisch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2201179A (en) * 1938-11-26 1940-05-21 Makaroff Automobile lift
DE1082023B (de) * 1958-12-06 1960-05-19 Ingo Trepel Hebetisch mit Nuernberger Schere
FR1562515A (fr) * 1967-04-24 1969-04-04
FR1524844A (fr) * 1967-05-30 1968-05-10 J E Greiner Company Procédé et appareil pour le garage des avions dans les aéroports
DE9217366U1 (de) * 1992-12-18 1994-01-27 Wegmann & Co Gmbh, 34127 Kassel Scherenhubtisch

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29607020U1 (de) * 1996-04-18 1996-08-14 Expert Maschinenbau Gmbh, 64653 Lorsch Scheren-Hubtisch
US20140103277A1 (en) * 2012-10-15 2014-04-17 Cameron Lanning Cormack Hybrid Wedge Jack/Scissor Lift Lifting Apparatus and Method of Operation Thereof
US9296596B2 (en) * 2012-10-15 2016-03-29 Cameron Lanning Cormack Hybrid wedge jack/scissor lift lifting apparatus and method of operation thereof
CN107176540A (zh) * 2017-06-06 2017-09-19 北京航天发射技术研究所 一种用于大吨位货物转运的对接装置
CN107176540B (zh) * 2017-06-06 2018-07-13 北京航天发射技术研究所 一种用于大吨位货物转运的对接装置
WO2019153086A1 (fr) * 2018-02-07 2019-08-15 Terracube International Inc. Table élévatrice et procédé d'utilisation

Also Published As

Publication number Publication date
DE9415656U1 (de) 1994-11-17
ES2126825T3 (es) 1999-04-01
DE59504620D1 (de) 1999-02-04
EP0704404B1 (fr) 1998-12-23

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