EP2013134B1 - Elevating platform, in particular for small lifting heights - Google Patents

Elevating platform, in particular for small lifting heights Download PDF

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Publication number
EP2013134B1
EP2013134B1 EP07724451A EP07724451A EP2013134B1 EP 2013134 B1 EP2013134 B1 EP 2013134B1 EP 07724451 A EP07724451 A EP 07724451A EP 07724451 A EP07724451 A EP 07724451A EP 2013134 B1 EP2013134 B1 EP 2013134B1
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EP
European Patent Office
Prior art keywords
lifting
frame
horizontal
rollers
lifting frame
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
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EP07724451A
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German (de)
French (fr)
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EP2013134B8 (en
EP2013134A1 (en
Inventor
Jozef Ezechias
Werner Swoboda
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Eisenmann SE
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Eisenmann SE
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Publication of EP2013134A1 publication Critical patent/EP2013134A1/en
Application granted granted Critical
Publication of EP2013134B1 publication Critical patent/EP2013134B1/en
Publication of EP2013134B8 publication Critical patent/EP2013134B8/en
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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
    • B66F7/0608—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement driven by screw or spindle
    • 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, in particular for small lifting heights according to the preamble of patent claim 1.
  • lifting tables payloads, which are arranged on the lifting frame, raised precisely.
  • heavy motor vehicle bodies are brought to small heights of preferably 5 to 10 cm in order to free them from a support surface, in particular from a transport device.
  • a lifting table of the type mentioned is from the FR 2 314 133 known.
  • a lifting frame is adjustable by means of power transmission means against a horizontal support in height by the power transmission means are pivotally connected at the upper end to the lifting table and roll at its lower end on inclined relative to the horizontal cam surfaces.
  • Drive means move via a lever linkage the lower rollers; the entire arrangement is symmetrical to a vertical median plane.
  • As drive means hydraulic cylinders are provided.
  • a lifting table similar to that of the type mentioned is in the JP 2001 262992 described.
  • the drive there is also a hydraulic cylinder, with the help of two wedges in opposite directions be moved on a base plate, such that the slopes of the wedges are moved against sliding elements, which rests on joints of the lifting table.
  • the arrangement is also symmetrical about a vertical median plane; lateral guides ensure a purely vertical movement of the lifting table.
  • Object of the present invention is to design a lifting table of the type mentioned, in which a possible constant course of a required driving force over the entire lifting process can be realized.
  • the lifting frame on its underside and / or the base frame at its top in each case two opposite the horizontal inclined surfaces.
  • At least two lifting rollers driven by the drive means are guided to be movable at least in the horizontal direction, such that they roll in the direction of inclination when moving in the horizontal direction from below or from above on the inclined surface, thereby lifting or lowering the lifting frame vertically.
  • the lifting rollers slide as a result of the driving force in their horizontal movement wedge-like below or over the inclined surfaces and push them with a corresponding lifting force vertically upwards, as they are even guided horizontally, or be pushed upwards.
  • the lifting rollers roll with minimal friction losses from below or from above onto the inclined surface.
  • the inclined surface has the advantage that the drive means can be optimally dimensioned. Depending on a ratio, it must be just large enough to provide a vertical lifting force sufficient to lift the payload. About the degree of inclination the surface can be given the translation between the lifting force and the driving force.
  • the power transmission means can be optimized. For example, drive rods can be significantly smaller dimensions.
  • the at least two surfaces are arranged with mutually mirror-symmetrical inclinations each with respect to the horizontal symmetrical to a vertical center plane and two corresponding lifting rollers for vertically moving the lifting frame are movable toward and away from each other.
  • the lifting frame can be raised evenly by the opposing lifting rollers.
  • the surfaces may in this case be inclined toward one another or away from one another.
  • the drive means a spindle with two opposing threads, via which the two lifting rollers can be moved in the horizontal direction towards and away from each other.
  • two opposing lifting rollers can move synchronously and evenly horizontally towards each other or away from each other.
  • guide rollers are rotatably mounted on both sides of axes, which are guided in guide rails of the base frame.
  • On each axis at least one lifting roller is also independent of the guide rollers rotatably mounted.
  • At least two lifting rollers can be arranged on an axle, which can be guided over two guide rollers in two horizontal guide rails. In this way, a secure and stable horizontal guide for the lifting rollers can be realized.
  • two lifting rollers can be arranged on a common axis and with this at least horizontally displaceable and can roll on two corresponding surfaces lying in the same inclined to the horizontal plane or a single contiguous inclined to the horizontal surface.
  • Two such parallel lifting roller surface arrangements have the great advantage that the lifting force acts distributed over the width of the lifting frame.
  • the surface on the lifting frame at least in the area facing the base frame or the surface on the base frame at least in the Just be facing the lifting frame area is then constant over the entire lifting process. It can in particular be inclined at an angle of 30 ° relative to the horizontal, whereby a particularly favorable translation of the driving force to the lifting force is achieved.
  • the inclination of the surface on the lifting frame relative to the horizontal in the direction of the base frame or the inclination of the surface on the base frame relative to the horizontal increase in the direction of the lifting frame.
  • the lifting frame and the base frame can be connected via at least one stabilizing device for laterally stabilizing the lifting frame during lifting.
  • FIG. 1 is an embodiment of a generally provided with the reference numeral 10 lifting table for small lifting heights between 5 cm and 10 cm shown in lowered position.
  • the lift table 10 is shown in the raised position.
  • heavy payloads not shown, in particular motor vehicle bodies with masses of about 1000 kg, can be raised evenly.
  • the lift table 10 includes a horizontally oriented base frame 12, in the FIGS. 1 and 2 below, with which he stands on a not shown surface.
  • the base frame 12 is rectangular in plan view. Its longitudinal sides are formed by two straight parallel guide rails 14 of U-shaped cross section, the open longitudinal sides facing each other. At their transverse sides, the guide rails 14 are also open.
  • the guide rails 14 are connected to each other via two parallel cross struts 16; in the FIGS. 1 and 2 only one of the cross struts 16 is visible at the bottom left.
  • the cross struts 16 are each secured to the ends of the guide rails 14 at the lower longitudinal sides.
  • the lifting table 10 has a parallel to the base frame 12 aligned elongated lifting frame 18 for receiving the payload.
  • the lifting frame 18 is vertically raised or lowered relative to the base frame 12.
  • the lifting frame 18 is viewed from above U-shaped, with its legs define its longitudinal direction. He is to the in FIGS. 1 and 2 open in the background lying transverse side of the base frame 12.
  • the two legs 62 of the lifting frame 18 extend parallel to the guide rails 14 and are each formed by a hollow longitudinal frame part 20 with a rectangular cross-section.
  • the longitudinal frame members 20 are connected at their ends on the closed side of the lifting frame 18 via a transverse bar 22.
  • the transverse strip 22 is fastened on the upper sides of the longitudinal frame parts 20 facing away from the base frame 12 and extends parallel to the transverse struts 16 of the base frame 12.
  • the outer width of the lifting frame 18 in the transverse direction and its outer length in the longitudinal direction are smaller than the corresponding inner width or inner length of the base frame 12, so that the lifting frame 18 is immersed in the lowered position from above into the base frame 12, as shown in FIG FIG. 1 is shown.
  • each longitudinal frame member 20 The two transverse end faces 24 of each longitudinal frame member 20 are compared to its upper longitudinal side, which extends horizontally, inclined by about 30 ° in the direction of the other end face 24, and so with their surfaces facing the base frame 12.
  • the two end faces 24 of a longitudinal frame part 20 are arranged in this way with opposite inclination relative to the horizontal symmetrical to a vertical center plane, not shown, and inclined away from each other, that is, their surfaces facing away from each other outwardly viewed in the longitudinal direction of the lifting table 10 away.
  • the two lying on the same transverse side of the lifting table 10 end faces 24 of the longitudinal frame members 20 are located in a common plane, which is inclined by 30 ° relative to the horizontal.
  • a lifting roller 26 is arranged so that it can roll in the direction of inclination of the end face 24, viewed from above in the longitudinal direction of the lifting frame 18, on this.
  • the two located on the same transverse side of the lifting frame 18 lifting rollers 26 are rotatably mounted on a common axis 28.
  • the distance between the lifting rollers 26 of an axis 28 corresponds to the distance of these corresponding inclined end faces 24.
  • a respective guide roller 32 is rotatably mounted relative to these independently of the lifting rollers 26.
  • Each guide roller 32 is guided in the respectively corresponding horizontal guide rail 14.
  • the diameter of the guide rollers 32 is smaller than the vertical inner height of the guide rails 14.
  • the lifting rollers 26 roll from below in each case on their associated inclined flat end face 24 in the direction of inclination.
  • the lifting rollers 26 slide like a wedge under the inclined end faces 24 and lift in this way with a corresponding vertically directed lifting force the lifting frame 18 evenly at all four corners vertically.
  • the lifting rollers 26 roll on the inclined end faces 24 in the opposite direction of rotation to the guide rollers 32 in the guide rails 14.
  • the translation of the driving force to the lifting force is constant throughout the lifting process.
  • the horizontal one Guide in the guide rail 14 prevents the lifting rollers 26 dodge when rolling on the inclined end faces 24 vertically down instead of pressing the inclined end faces 24 with the lifting force vertically upwards.
  • the drive of the axles 28 takes place via a respective U-shaped pulling device 34.
  • the two pulling devices 34 are essentially identical. They lie in a horizontal plane between the guide rails 14 of the base frame 12. Their closed sides face each other and their open sides of the respective axis 28.
  • the legs of the drawbars 34 are each formed by two tie rods 36, of which in FIG. 1 only the one lying in the background is visible. They run parallel to one another and to the guide rails 14.
  • the free ends of the tie rods 36 each have an eyelet 38. Between the eyelets 38 of the same pulling device 34 extends perpendicular to the tie rods 36, a sleeve 40 which is inserted in each case with one end in one of the eyelets 38. In each sleeve 40, one of the axles 28 rotates freely relative to the sleeve 40.
  • the tie rods 36 and the sleeve 40 are located between the lifting rollers 26 of the corresponding axis 28. The lifting rollers 26 are freely rotatable relative to the sleeve 40.
  • the extension over both drawbars 34 in the longitudinal direction of the base frame 12 is significantly smaller than the length of the lower longitudinal sides of the longitudinal frame members 20 of the lifting frame 18, ie the distance of the edges of the two inclined end faces 24 there.
  • the lifting rollers 26 can thus roll up to the edges of the end faces 24, without the two pulling devices 34 abut each other and hinder each other.
  • the closed sides of the drawbars 34 are each formed by a straight elongated stem nut carrier 42 having a central spindle nut 44.
  • the Spindelmutterisme 42 extend perpendicular to the tie rods 36 in a common horizontal plane with these. They face each other with their spindle nuts 44 coaxial.
  • spindle nuts 44 performs a spindle 46 with an approximately in the middle changing counter-rotating thread, which in the FIGS. 1 and 2 not shown.
  • the spindle 46 By axial rotation of the spindle 46 so the Spindelmutterisme 42 are synchronously toward or away from each other movable. In this case, they exert a corresponding driving force in the horizontal direction on their tie rods 36 and on these on the axes 28 and the lifting rollers 26.
  • the spindle 46 is at one end, in FIGS. 1 and 2 in the background, connected to an electric motor 48 and with this drivable.
  • the electric motor 48 is mounted on a cross member 50 on the base frame 12. It is connected via lines not shown with a control device, also not shown.
  • a guide device 52 for the drawbars 34 is located between the guide rails 14.
  • the guide device 52 comprises two cross members 50 running parallel to the transverse struts 16 - on which in the FIGS. 1 and 2 lying in the background, already mentioned cross member 50 of the electric motor 50 is fixed - which are fixed with their ends to the undersides of the guide rails 14.
  • the longitudinal members 54 extend parallel in the longitudinal direction of the base frame 12 in an area between the tie rods 36 of the drawbars 34th
  • the spindle nut carriers 42 rest on the longitudinal carriers 54. They are displaceable in the longitudinal direction of the base frame 12 relative to the longitudinal members 54. Where they rest on the longitudinal members 54, the Spindelmutter uman 42 on their undersides guide grooves 56 which extend in the longitudinal direction of the longitudinal members 54. The longitudinal members 54 dip into the guide grooves 56 and thus guide the spindle nut carriers 42 in the horizontal longitudinal direction.
  • the lifting frame 18 and the base frame 12 are also connected via two parallel, substantially identical stabilizing shears 58 for laterally stabilizing the lifting frame 18 during lifting and lowering.
  • the stabilizing shears 58 are viewed from the side approximately in the middle of the lifting table 10. They are respectively at the top of the outer, namely the other longitudinal frame part 20 facing away from, vertical longitudinal side of the corresponding longitudinal frame part 20 of the lifting frame 18 attached. Below they are on the lifting frame 18 facing inside, so the other guide rail 14 side facing the corresponding guide rail 14 is arranged. The distance between the longitudinal frame members 20 and the corresponding guide rails 14 is so large that the corresponding stabilizing shears 58 find in the lowered state of the lifting table 10 between the two place.
  • the longitudinal frame members 20 each have at their outer vertical longitudinal sides approximately centrally a rectangular opening 60 for the associated stabilizing shears 58.
  • the dimensions of the openings 60 are at least so great that the stabilizing shears 58 can freely extend or retract when lifting and lowering the lifting table 10.
  • Each stabilizing shears 58 has two legs 62 of equal length, which are pivotally connected centrally relative to one another.
  • One of the legs 62 is pivotally attached at its upper end via a long upper pivot pin 64 to the longitudinal frame part 20 of the lifting table 10.
  • the upper pivot pin 64 leads from the outer vertical longitudinal side through the opening 60 therethrough to the opposite inner vertical longitudinal side where it is fixed.
  • leg 62 With its lower end of the leg 62 is pivotally guided over a lower leg-roller, not shown, in the guide rail 14 and slidable in the longitudinal direction.
  • the diameter of the lower leg roller is smaller than the vertical inner height of the longitudinal guide rail 14 so that it has some play in the vertical direction.
  • the other leg 62 is pivotally guided over an upper leg roller 66 in the interior of the hollow longitudinal member 54 and displaceable in the longitudinal direction.
  • the axis of the upper leg roller 66 extends through the opening 60 therethrough.
  • the diameter of the upper leg roller 66 is smaller than the vertical inner height of the longitudinal frame part 20 so that it has some play in the vertical direction.
  • the lower pivot pin 68 is located in the side view vertically under the upper pivot pin 64th
  • the upper leg rollers 66 When lifting the lifting frame 18, the upper leg rollers 66 each roll in the interior of the side members 54 at the lower interior surface and the lower leg rollers in the guide rail 14 at the upper interior surfaces thereof. When lowering, the upper leg rollers 66 roll up and the lower leg rollers 66 down.
  • the stabilizing shears 58 prevent the lifting frame 18 when moving the lifting rollers 26 this horizontally evades in the longitudinal direction, instead of exclusively in the vertical direction.
  • the electric motor 48 is driven so that it drives the spindle 46 at a constant speed.
  • the spindle 46 screws into the two spindle nuts 44 a.
  • the two pulling devices 34 are pulled towards each other.
  • the motor power required to lift the lifting frame 18 is constant throughout the lifting process. It is about half the required maximum engine power comparable known from the prior art lifting tables with eccentric discs.
  • the invention is not limited to lifting tables 10 for small lifting heights between 5 cm and 10 cm, but can also be realized for lifting heights of more than 10 cm and / or with correspondingly smaller roll diameter less than 5 cm.
  • the lift table 10 can also be designed for payloads of more or less than 1000 kg.
  • the base frame 12 may additionally have on its underside on wheels, so that the lifting table 10 is mobile.
  • a different kind of drive means for example an internal combustion engine, a hydraulic drive or a compressed air drive, may be provided.
  • the drive means may also have at least one flexible traction means, for example a cable, and at least one take-up drum instead of the spindles 46 with spindle nuts 44.
  • lifting rollers 26 may be provided on corresponding inclined surfaces.
  • the end faces 24 may also be inclined in their flat areas by more or less than 30 ° relative to the horizontal. About the inclination angle, the translation of the driving force to the lifting force can be specified.
  • the lifting rollers 26 can also be driven separately, in particular via a respective spindle 46. It is also possible to arrange each lift roller 26 on a separate axle 28.
  • guide rollers 32 instead of the guide rollers 32 in the first embodiment, other types of guide means, such as sliding blocks can be used.
  • the two inclined end faces 24 on the same transverse side of the lifting table 10 may also be continuous.
  • stabilizing shears 58 instead of the stabilizing shears 58, a different type of stabilizing means for the lateral stabilization of the lifting frame 18 during lifting, for example a linear guide, a four-bar linkage or a lever may be provided.

Abstract

The invention proposes an elevating platform (10), in particular for small lifting heights, having a basic frame (12), a lifting frame (18) for accommodating a useful load and having at least one drive means (48) for the substantially vertical lifting and lowering of the lifting frame (18) in relation to the basic frame (12). The lifting frame (18) has, on its underside, and/or the basic frame (12) has, on its upper side, at least one planar face (24), which is inclined with respect to the horizontal. At least one lifting roller (26), which is driven by the drive means (48), is guided such that it can move at least in the horizontal direction in such a way that it rolls from the bottom or from the top on the inclined face (24) in the direction of inclination thereof during a movement in the horizontal direction and, in the process, lifts or lowers the lifting frame (18) vertically.

Description

Die Erfindung betrifft einen Hubtisch insbesondere für kleine Hubhöhen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a lifting table, in particular for small lifting heights according to the preamble of patent claim 1.

Mit derartigen Hubtischen werden Nutzlasten, welche auf dem Hubrahmen angeordnet werden, präzise angehoben. Beispielsweise werden in der Automobilproduktion mit solchen Hubtischen schwere Kraftfahrzeugkarosserien auf kleine Höhen von vorzugsweise 5 bis 10 cm gebracht, um diese von einer Auflagefläche, insbesondere von einer Transportvorrichtung, frei zu bekommen.With such lifting tables payloads, which are arranged on the lifting frame, raised precisely. For example, in automobile production with such lifting tables, heavy motor vehicle bodies are brought to small heights of preferably 5 to 10 cm in order to free them from a support surface, in particular from a transport device.

Ein Hubtisch der eingangs genannten Art ist aus der FR 2 314 133 bekannt geworden. Dort ist ein Hubrahmen mittels Kraftübertragungsmitteln gegen eine horizontale Unterlage in der Höhe verstellbar, indem die Kraftübertragungsmittel am oberen Ende schwenkbar mit dem Hubtisch verbunden sind und an ihrem unteren Ende auf gegenüber der Horizontalen geneigten Kurvenflächen abrollen. Antriebsmittel bewegen über ein Hebelgestänge die unteren Rollen; die gesamte Anordnung ist symmetrisch zu einer vertikalen Mittelebene. Als Antriebsmittel sind Hydraulikzylinder vorgesehen.A lifting table of the type mentioned is from the FR 2 314 133 known. There, a lifting frame is adjustable by means of power transmission means against a horizontal support in height by the power transmission means are pivotally connected at the upper end to the lifting table and roll at its lower end on inclined relative to the horizontal cam surfaces. Drive means move via a lever linkage the lower rollers; the entire arrangement is symmetrical to a vertical median plane. As drive means hydraulic cylinders are provided.

Ein Hubtisch ähnlich dem der genannten Art ist in der JP 2001 262992 beschrieben. Als Antrieb dient dort ebenfalls ein Hydraulikzylinder, mit dessen Hilfe zwei Keile gegenläufig auf einer Grundplatte verschoben werden, derart, dass die Schrägen der Keile gegen Gleitelemente bewegt werden, an welchen über Gelenke der Hubtisch aufliegt. Die Anordnung ist ebenfalls symmetrisch zu einer vertikalen Mittelebene; seitliche Führungen sorgen für rein vertikale Bewegung des Hubtisches.A lifting table similar to that of the type mentioned is in the JP 2001 262992 described. The drive there is also a hydraulic cylinder, with the help of two wedges in opposite directions be moved on a base plate, such that the slopes of the wedges are moved against sliding elements, which rests on joints of the lifting table. The arrangement is also symmetrical about a vertical median plane; lateral guides ensure a purely vertical movement of the lifting table.

Aus der US 5 294 379 ist ein Hebestuhl bekannt, dessen Hubrahmen zugleich mit dem Anheben auch geneigt wird. Der Antrieb erfolgt über eine in beiden Richtungen drehbare Spindel, welche eine Querstange bewegt, an deren Enden Heberollen in schrägen Kulissenführungen abrollen, wodurch die Hebe- und Senkbewegung zustande kommt.From the US 5,294,379 is known a lifting chair whose lifting frame is also inclined at the same time with the lifting. The drive takes place via a rotatable spindle in both directions, which moves a cross bar, at the ends lifting rollers roll in oblique slide guides, whereby the lifting and lowering movement comes about.

Vom Markt her bekannte weitere Hubtische weisen Exzenterscheiben auf, die um eine Achse drehbar angetrieben werden und deren Ränder von unten an die Unterseite des Hubrahmens drücken. Durch Drehung der Exzenterscheiben wird der Hubtisch vertikal angehoben beziehungsweise abgesenkt. Allerdings ist der Verlauf eines Antriebsmomentes der Exzenterscheibe stark von der Hubhöhe abhängig und nicht linear, so dass das Antriebsmittel, beispielsweise ein Elektromotor, für ein maximal erforderliches Antriebsmoment, insbesondere eine maximal erforderliche Antriebskraft, dimensioniert sein muss und ansonsten deutlich überdimensioniert ist.From the market known further lifting tables have eccentric discs which are rotatably driven about an axis and press their edges from below to the underside of the lifting frame. By rotation of the eccentric discs of the lift table is raised or lowered vertically. However, the course of a drive torque of the eccentric disc is highly dependent on the lifting height and not linear, so that the drive means, such as an electric motor for a maximum required drive torque, in particular a maximum required driving force, must be dimensioned and otherwise significantly oversized.

Aufgabe der vorliegenden Erfindung ist es, einen Hubtisch der eingangs genannten Art zu gestalten, bei dem ein möglichst konstanter Verlauf einer erforderlichen Antriebskraft über den gesamten Hubvorgang realisierbar ist.Object of the present invention is to design a lifting table of the type mentioned, in which a possible constant course of a required driving force over the entire lifting process can be realized.

Diese Aufgabe wird erfindungsgemäß durch einen Hubtisch mit den im Patentanspruch 1 angegebenen Merkmalen gelöst.This object is achieved by a lifting table with the features specified in claim 1.

Wie aus dem Stand der Technik an sich bekannt, hat der Hubrahmen an seiner Unterseite und/oder der Grundrahmen an seiner Oberseite jeweils zwei gegenüber der Horizontalen geneigte Flächen. Dabei sind wenigstens zwei mit dem Antriebsmittel angetriebenen Heberollen wenigstens in horizontaler Richtung bewegbar geführt, derart, dass sie beim Bewegen in horizontaler Richtung von unten beziehungsweise von oben auf der geneigten Fläche in deren Neigungsrichtung abrollen und dabei den Hubrahmen vertikal anhebt beziehungsweise absenken.As known from the prior art, the lifting frame on its underside and / or the base frame at its top in each case two opposite the horizontal inclined surfaces. At least two lifting rollers driven by the drive means are guided to be movable at least in the horizontal direction, such that they roll in the direction of inclination when moving in the horizontal direction from below or from above on the inclined surface, thereby lifting or lowering the lifting frame vertically.

Somit schieben sich zum Anheben des Hubrahmens die Heberollen in Folge der Antriebskraft bei ihrer horizontalen Bewegung keilartig unter beziehungsweise über die geneigten Flächen und drücken diese mit einer entsprechenden Hubkraft vertikal nach oben, da sie selbst horizontal geführt sind, beziehungsweise werden selbst nach oben gedrückt. Die Heberollen rollen hierbei mit minimalen Reibungsverlusten von unten beziehungsweise von oben auf den geneigten Fläche ab. Die geneigte Fläche hat den Vorteil, dass das Antriebsmittel optimal dimensioniert sein kann. Abhängig von einer Übersetzung muss sie gerade so groß sein, dass mit ihr eine vertikale Hubkraft bewirkt wird, die ausreicht, um die Nutzlast zu heben. Über den Neigungsgrad der Fläche kann die Übersetzung zwischen der Hubkraft und der Antriebskraft vorgegeben werden. Dadurch, dass die maximale Antriebskraft deutlich geringer ist als dies bei Hubtischen mit Exzenterscheiben erforderlich ist, können auch die Kraftübertragungsmittel optimiert werden. Beispielsweise können Antriebsstangen deutlich kleiner dimensioniert werden.Thus, to lift the lifting frame, the lifting rollers slide as a result of the driving force in their horizontal movement wedge-like below or over the inclined surfaces and push them with a corresponding lifting force vertically upwards, as they are even guided horizontally, or be pushed upwards. The lifting rollers roll with minimal friction losses from below or from above onto the inclined surface. The inclined surface has the advantage that the drive means can be optimally dimensioned. Depending on a ratio, it must be just large enough to provide a vertical lifting force sufficient to lift the payload. About the degree of inclination the surface can be given the translation between the lifting force and the driving force. The fact that the maximum driving force is significantly lower than that required for lifting tables with eccentric discs, the power transmission means can be optimized. For example, drive rods can be significantly smaller dimensions.

Die wenigstens zwei Flächen sind dabei mit zueinander spiegelbildlichen Neigungen jeweils gegenüber der Horizontalen symmetrisch zu einer vertikalen Mittelebene angeordnet und zwei entsprechende Heberollen zum vertikalen Bewegen des Hubrahmens sind aufeinander zu und voneinander weg bewegbar. Auf diese Weise kann der Hubrahmen durch die sich gegenüberliegenden Heberollen gleichmäßig angehoben werden. Darüber hinaus wird so verhindert, dass der Hubtisch beim Einschieben der Heberollen in horizontaler Richtung ausweicht, da immer die gegenüberliegende Heberolle dagegen hält. Die Flächen können hierbei aufeinander zu oder voneinander weg geneigt sein.The at least two surfaces are arranged with mutually mirror-symmetrical inclinations each with respect to the horizontal symmetrical to a vertical center plane and two corresponding lifting rollers for vertically moving the lifting frame are movable toward and away from each other. In this way, the lifting frame can be raised evenly by the opposing lifting rollers. In addition, it is thus prevented that the lifting table evades in the horizontal direction when inserting the lifting rollers, as always the opposite lifting roller holds against it. The surfaces may in this case be inclined toward one another or away from one another.

Erfindungsgemäß treibt das Antriebsmittel eine Spindel mit zwei gegenläufigen Gewinden an, über die die beiden Heberollen in horizontaler Richtung aufeinander zu und voneinander weg bewegt werden können. Dadurch können sich zwei sich gegenüberliegenden Heberollen synchron und gleichmäßig horizontal aufeinander zu beziehungsweise voneinander weg bewegen.According to the invention drives the drive means a spindle with two opposing threads, via which the two lifting rollers can be moved in the horizontal direction towards and away from each other. As a result, two opposing lifting rollers can move synchronously and evenly horizontally towards each other or away from each other.

Dabei sind Führungsrollen an beiden Seiten von Achsen drehbar befestigt, welche in Führungsschienen des Grundrahmens geführt sind. Auf jeder Achse ist außerdem mindestens eine Heberolle unabhängig von den Führungsrollen drehbar befestigt. Auf diese Weise ist eine sichere und stabile Führung für die Heberollen realisierbar und die Kraftübertragung zwischen Grundrahmen und Heberahmen kann mit besonders wenigen mechanischen Elementen erfolgen, die außerdem kaum Reibungskraftverluste aufweisen.In this case, guide rollers are rotatably mounted on both sides of axes, which are guided in guide rails of the base frame. On each axis at least one lifting roller is also independent of the guide rollers rotatably mounted. In this way, a secure and stable guidance for the lifting rollers can be realized and the power transmission between the base frame and lifting frame can be done with very few mechanical elements, which also have hardly any friction force losses.

Vorteilhafterweise können wenigstens zwei Heberollen auf einer Achse angeordnet sein, welche über zwei Führungsrollen in zwei horizontalen Führungsschienen geführt sein können. Auf diese Weise ist eine sichere und stabile Horizontalführung für die Heberollen realisierbar.Advantageously, at least two lifting rollers can be arranged on an axle, which can be guided over two guide rollers in two horizontal guide rails. In this way, a secure and stable horizontal guide for the lifting rollers can be realized.

Bei einer weiteren vorteilhaften Ausführungsform können zwei Heberollen auf einer gemeinsamen Achse angeordnet und mit dieser wenigstens horizontal verschiebbar sein und können an zwei entsprechenden, in derselben zur Horizontalen geneigten Ebene liegenden Flächen oder einer einzigen zusammenhängenden zur Horizontalen geneigten Fläche abrollen. Zwei derartige parallele Heberollen-Flächen-Anordnungen haben den großen Vorteil, dass die Hubkraft über die Breite des Hubrahmens verteilt angreift.In a further advantageous embodiment, two lifting rollers can be arranged on a common axis and with this at least horizontally displaceable and can roll on two corresponding surfaces lying in the same inclined to the horizontal plane or a single contiguous inclined to the horizontal surface. Two such parallel lifting roller surface arrangements have the great advantage that the lifting force acts distributed over the width of the lifting frame.

Vorteilhafterweise kann die Fläche am Hubrahmen wenigstens in dem dem Grundrahmen zugewandten Bereich beziehungsweise die Fläche am Grundrahmen wenigstens in dem dem Hubrahmen zugewandten Bereich eben sein. Die Antriebskraft ist dann über den gesamten Hubvorgang konstant. Sie kann/können insbesondere um einen Winkel von 30° gegenüber der Horizontalen geneigt sein, wodurch eine besonders günstige Übersetzung der Antriebskraft zu der Hubkraft erreicht wird.Advantageously, the surface on the lifting frame at least in the area facing the base frame or the surface on the base frame at least in the Just be facing the lifting frame area. The driving force is then constant over the entire lifting process. It can in particular be inclined at an angle of 30 ° relative to the horizontal, whereby a particularly favorable translation of the driving force to the lifting force is achieved.

Ferner kann die Neigung der Fläche am Hubrahmen gegenüber der Horizontalen in Richtung des Grundrahmens beziehungsweise die Neigung der Fläche am Grundrahmen gegenüber der Horizontalen in Richtung des Hubrahmens zunehmen. Dies hat den großen Vorteil, dass am Anfang eines Hubvorgangs eine deutlich kleinere Antriebskraft zum Heben des Hubrahmens aufzuwenden ist, da die Steigung der Fläche(n) am Anfang kleiner sind, als am Ende des Hubvorgangs. Die Kraftdifferenz wird am Anfang zur Beschleunigung der zu bewegenden Massen auf die gewünschte Hubgeschwindigkeit verwendet.Furthermore, the inclination of the surface on the lifting frame relative to the horizontal in the direction of the base frame or the inclination of the surface on the base frame relative to the horizontal increase in the direction of the lifting frame. This has the great advantage that at the beginning of a lifting operation a much smaller driving force is required to lift the lifting frame, since the slope of the surface (s) are smaller at the beginning than at the end of the lifting process. The force difference is used at the beginning to accelerate the masses to be moved to the desired lifting speed.

Um einen Lateralversatz des Hubrahmens gegenüber dem Grundrahmen beim Hubvorgang deutlich zu verringern, können der Hubrahmen und der Grundrahmen über wenigstens eine Stabilisierungseinrichtung zur lateralen Stabilisierung des Hubrahmens beim Anheben verbunden sein.In order to significantly reduce a lateral offset of the lifting frame relative to the base frame during the lifting operation, the lifting frame and the base frame can be connected via at least one stabilizing device for laterally stabilizing the lifting frame during lifting.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert; es zeigen

Figur 1
schematisch eine isometrische Darstellung des erfindungsgemäßen Ausführungsbeispiels eines Hubtisches für kleine Hubhöhen in abgesenkter Position;
Figur 2
schematisch den Hubtisch aus Figur 1 in angehobener Position.
An embodiment of the invention will be explained in more detail with reference to the drawing; show it
FIG. 1
schematically an isometric view of the embodiment of the invention Lifting table for small lifting heights in lowered position;
FIG. 2
schematically the lift table FIG. 1 in raised position.

In Figur 1 ist ein Ausführungsbeispiel eines insgesamt mit dem Bezugszeichen 10 versehenen Hubtisches für kleine Hubhöhen zwischen 5 cm und 10 cm in abgesenkter Position dargestellt. In der Figur 2 ist der Hubtisch 10 in angehobener Position gezeigt. Mit dem Hubtisch 10 können nicht gezeigte schwere Nutzlasten, insbesondere Kraftfahrzeugkarosserien mit Massen von etwa 1000 kg, gleichmäßig angehoben werden.In FIG. 1 is an embodiment of a generally provided with the reference numeral 10 lifting table for small lifting heights between 5 cm and 10 cm shown in lowered position. In the FIG. 2 the lift table 10 is shown in the raised position. With the lifting table 10 heavy payloads, not shown, in particular motor vehicle bodies with masses of about 1000 kg, can be raised evenly.

Der Hubtisch 10 umfasst einen horizontal ausgerichteten Grundrahmen 12, in den Figuren 1 und 2 unten, mit dem er auf einem nicht gezeigten Untergrund steht. Der Grundrahmen 12 ist in der Draufsicht rechteckig. Seine Längsseiten werden von zwei geraden parallelen Führungsschienen 14 mit U-förmigem Querschnitt gebildet, deren offene Längsseiten einander zugewandt sind. An ihren Querseiten sind die Führungsschienen 14 ebenfalls offen.The lift table 10 includes a horizontally oriented base frame 12, in the FIGS. 1 and 2 below, with which he stands on a not shown surface. The base frame 12 is rectangular in plan view. Its longitudinal sides are formed by two straight parallel guide rails 14 of U-shaped cross section, the open longitudinal sides facing each other. At their transverse sides, the guide rails 14 are also open.

Die Führungsschienen 14 sind über zwei parallele Querstreben 16 miteinander verbunden; in den Figuren 1 und 2 ist nur eine der Querstreben 16 links unten sichtbar. Die Querstreben 16 sind jeweils an den Enden der Führungsschienen 14 an deren unteren Längsseiten befestigt.The guide rails 14 are connected to each other via two parallel cross struts 16; in the FIGS. 1 and 2 only one of the cross struts 16 is visible at the bottom left. The cross struts 16 are each secured to the ends of the guide rails 14 at the lower longitudinal sides.

Oben verfügt der Hubtisch 10 über einen parallel zum Grundrahmen 12 ausgerichteten länglichen Hubrahmen 18 zur Aufnahme der Nutzlast. Der Hubrahmen 18 ist relativ zum Grundrahmen 12 vertikal anhebbar beziehungsweise absenkbar.Above the lifting table 10 has a parallel to the base frame 12 aligned elongated lifting frame 18 for receiving the payload. The lifting frame 18 is vertically raised or lowered relative to the base frame 12.

Der Hubrahmen 18 ist von oben betrachtet U-förmig, wobei seine Schenkel seine Längsrichtung definieren. Er ist zu der in Figuren 1 und 2 im Hintergrund liegenden Querseite des Grundrahmens 12 hin offen. Die beiden Schenkel 62 des Hubrahmen 18 verlaufen parallel zu den Führungsschienen 14 und werden jeweils durch einen hohlen Längsrahmenteil 20 mit rechteckigem Querschnitt gebildet. Die Längsrahmenteile 20 sind an ihren Enden auf der geschlossenen Seite des Hubrahmens 18 über ein Querleiste 22 verbunden. Die Querleiste 22 ist auf den dem Grundrahmen 12 abgewandten Oberseiten der Längsrahmenteile 20 befestigt und verläuft parallel zu den Querstreben 16 des Grundrahmens 12. Die Außenbreite des Hubrahmens 18 in Querrichtung und seine Außenlänge in Längsrichtung sind kleiner als die entsprechende Innenbreite beziehungsweise Innenlänge des Grundrahmens 12, so dass der Hubrahmen 18 in abgesenkter Position von oben in den Grundrahmen 12 eintaucht, wie dies in Figur 1 gezeigt ist.The lifting frame 18 is viewed from above U-shaped, with its legs define its longitudinal direction. He is to the in FIGS. 1 and 2 open in the background lying transverse side of the base frame 12. The two legs 62 of the lifting frame 18 extend parallel to the guide rails 14 and are each formed by a hollow longitudinal frame part 20 with a rectangular cross-section. The longitudinal frame members 20 are connected at their ends on the closed side of the lifting frame 18 via a transverse bar 22. The transverse strip 22 is fastened on the upper sides of the longitudinal frame parts 20 facing away from the base frame 12 and extends parallel to the transverse struts 16 of the base frame 12. The outer width of the lifting frame 18 in the transverse direction and its outer length in the longitudinal direction are smaller than the corresponding inner width or inner length of the base frame 12, so that the lifting frame 18 is immersed in the lowered position from above into the base frame 12, as shown in FIG FIG. 1 is shown.

Die beiden querseitigen Stirnflächen 24 eines jeden Längsrahmenteils 20 sind gegenüber seiner oberen Längsseite, welche horizontal verläuft, um etwa 30° in Richtung der jeweils anderen Stirnfläche 24 geneigt, und so mit ihren Oberflächen dem Grundrahmen 12 zugewandt. Die beiden Stirnflächen 24 eines Längsrahmenteils 20 sind auf diese Weise mit entgegengesetzter Neigung gegenüber der Horizontalen symmetrisch zu einer nicht gezeigten vertikalen Mittelebene angeordnet und voneinander weg geneigt, das heißt ihre Oberflächen zeigen voneinander weg nach außen, in Längsrichtung betrachtet vom Hubtisch 10 weg.The two transverse end faces 24 of each longitudinal frame member 20 are compared to its upper longitudinal side, which extends horizontally, inclined by about 30 ° in the direction of the other end face 24, and so with their surfaces facing the base frame 12. The two end faces 24 of a longitudinal frame part 20 are arranged in this way with opposite inclination relative to the horizontal symmetrical to a vertical center plane, not shown, and inclined away from each other, that is, their surfaces facing away from each other outwardly viewed in the longitudinal direction of the lifting table 10 away.

Jeweils die beiden auf derselben Querseite des Hubtisches 10 liegenden Stirnflächen 24 der Längsrahmenteile 20 befinden sich in einer gemeinsamen Ebene, welche um 30° gegenüber der Horizontalen geneigt ist.In each case, the two lying on the same transverse side of the lifting table 10 end faces 24 of the longitudinal frame members 20 are located in a common plane, which is inclined by 30 ° relative to the horizontal.

Unterhalb jeder geneigten Stirnfläche 24 ist eine Heberolle 26 so angeordnet, dass sie in Neigungsrichtung der Stirnfläche 24, von oben betrachtet in Längsrichtung des Hubrahmens 18, auf dieser abrollen kann. Jeweils die beiden auf derselben Querseite des Hubrahmens 18 befindlichen Heberollen 26 sind auf einer gemeinsamen Achse 28 drehbar befestigt. Die Achsen 28 erstrecken sich parallel zueinander horizontal in Querrichtung des Hubtisches 10. Der Abstand der Heberollen 26 einer Achse 28 entspricht dem Abstand der diesen entsprechenden geneigten Stirnflächen 24. Beim Verschieben der Achsen 28 in Längsrichtung des Hubrahmens 18 rollen deren Heberollen 26 synchron an den beiden zugehörigen geneigten Stirnflächen 24 ab. Um den Rollwiderstand und den Verschleiß zu minimieren, sind die Stirnflächen 24 mit gehärteten Leisten 30 versehen.Below each inclined end face 24, a lifting roller 26 is arranged so that it can roll in the direction of inclination of the end face 24, viewed from above in the longitudinal direction of the lifting frame 18, on this. In each case the two located on the same transverse side of the lifting frame 18 lifting rollers 26 are rotatably mounted on a common axis 28. The distance between the lifting rollers 26 of an axis 28 corresponds to the distance of these corresponding inclined end faces 24. When moving the axes 28 in the longitudinal direction of the lifting frame 18 roll their lifting rollers 26 synchronously the two associated inclined end faces 24 from. To minimize the rolling resistance and wear, the end faces 24 are provided with hardened strips 30.

An beiden Enden der Achsen 28 ist jeweils eine Führungsrolle 32 unabhängig von den Heberollen 26 relativ zu diesen drehbar befestigt. In den Figuren 1 und 2 ist lediglich links eine der Führungsrollen 32 zu sehen. Jede Führungsrolle 32 ist in der jeweils entsprechenden horizontalen Führungsschiene 14 geführt. Der Durchmesser der Führungsrollen 32 ist kleiner als die vertikale Innenhöhe der Führungsschienen 14. Die Achsen 28 und mit ihr die Heberollen 26 werden mit den Führungsschienen 14 immer in der gleichen horizontalen Ebene gehalten.At both ends of the axles 28, a respective guide roller 32 is rotatably mounted relative to these independently of the lifting rollers 26. In the FIGS. 1 and 2 only one of the guide rollers 32 can be seen on the left. Each guide roller 32 is guided in the respectively corresponding horizontal guide rail 14. The diameter of the guide rollers 32 is smaller than the vertical inner height of the guide rails 14. The axes 28 and with it the lifting rollers 26 are always held with the guide rails 14 in the same horizontal plane.

Werden die beiden Achse 28 mit einer Antriebskraft horizontal in Längsrichtung synchron aufeinander zu bewegt, so rollen die Heberollen 26 von unten jeweils auf der ihr zugehörigen geneigten ebenen Stirnfläche 24 in deren Neigungsrichtung ab. Hierbei schieben die Heberollen 26 sich keilartig unter die geneigten Stirnflächen 24 und heben auf diese Weise mit einer entsprechenden vertikal gerichteten Hubkraft den Hubrahmen 18 gleichmäßig an allen vier Ecken vertikal an. Die Heberollen 26 rollen auf den geneigten Stirnflächen 24 in entgegengesetztem Drehsinn zu den Führungsrollen 32 in den Führungsschienen 14 ab.If the two axis 28 with a driving force horizontally moved in the longitudinal direction synchronously toward each other, then the lifting rollers 26 roll from below in each case on their associated inclined flat end face 24 in the direction of inclination. Here, the lifting rollers 26 slide like a wedge under the inclined end faces 24 and lift in this way with a corresponding vertically directed lifting force the lifting frame 18 evenly at all four corners vertically. The lifting rollers 26 roll on the inclined end faces 24 in the opposite direction of rotation to the guide rollers 32 in the guide rails 14.

Die Übersetzung der Antriebskraft zur Hubkraft ist während des gesamten Hubvorgangs konstant. Die horizontale Führung in den Führungsschiene 14 verhindert, dass die Heberollen 26 beim Abrollen an den geneigten Stirnflächen 24 vertikal nach unten ausweichen statt die geneigten Stirnflächen 24 mit der Hubkraft vertikal nach oben zu drücken. Zum Absenken des Hubrahmens 18 werden die beiden Achsen 28 entsprechend voneinander weg bewegt.The translation of the driving force to the lifting force is constant throughout the lifting process. The horizontal one Guide in the guide rail 14 prevents the lifting rollers 26 dodge when rolling on the inclined end faces 24 vertically down instead of pressing the inclined end faces 24 with the lifting force vertically upwards. To lower the lifting frame 18, the two axes 28 are moved away from each other accordingly.

Der Antrieb der Achsen 28 erfolgt über jeweils eine U-förmige Zugeinrichtung 34. Die beiden Zugeinrichtungen 34 sind im Wesentlichen identisch. Sie liegen in einer horizontalen Ebene zwischen den Führungsschienen 14 des Grundrahmens 12. Ihre geschlossenen Seiten sind einander und ihre offenen Seiten der jeweiligen Achse 28 zugewandt.The drive of the axles 28 takes place via a respective U-shaped pulling device 34. The two pulling devices 34 are essentially identical. They lie in a horizontal plane between the guide rails 14 of the base frame 12. Their closed sides face each other and their open sides of the respective axis 28.

Die Schenkel der Zugeinrichtungen 34 sind jeweils durch zwei Zugstangen 36 gebildet, von denen in Figur 1 jeweils nur die im Hintergrund liegende sichtbar ist. Sie verlaufen parallel zueinander und zu den Führungsschienen 14.The legs of the drawbars 34 are each formed by two tie rods 36, of which in FIG. 1 only the one lying in the background is visible. They run parallel to one another and to the guide rails 14.

Die freien Enden der Zugstangen 36 weisen jeweils eine Öse 38 auf. Zwischen den Ösen 38 derselben Zugeinrichtung 34 erstreckt sich senkrecht zu den Zugstangen 36 eine Hülse 40, welche jeweils mit einem Ende in einer der Ösen 38 steckt. In jeder Hülse 40 läuft eine der Achsen 28 relativ zu der Hülse 40 frei drehbar. Die Zugstangen 36 und die Hülse 40 befinden sich zwischen den Heberollen 26 der entsprechenden Achse 28. Die Heberollen 26 sind relativ zur Hülse 40 frei drehbar.The free ends of the tie rods 36 each have an eyelet 38. Between the eyelets 38 of the same pulling device 34 extends perpendicular to the tie rods 36, a sleeve 40 which is inserted in each case with one end in one of the eyelets 38. In each sleeve 40, one of the axles 28 rotates freely relative to the sleeve 40. The tie rods 36 and the sleeve 40 are located between the lifting rollers 26 of the corresponding axis 28. The lifting rollers 26 are freely rotatable relative to the sleeve 40.

Die Ausdehnung über beide Zugeinrichtungen 34 in Längsrichtung des Grundrahmens 12 ist deutlich kleiner als die Länge der unteren Längsseiten der Längsrahmenteile 20 des Hubrahmens 18, also dem Abstand der Ränder der beiden geneigten Stirnflächen 24 dort. Die Heberollen 26 können so bis zu den Rändern der Stirnflächen 24 abrollen, ohne dass die beiden Zugeinrichtungen 34 aneinander stoßen und sich gegenseitig behindern.The extension over both drawbars 34 in the longitudinal direction of the base frame 12 is significantly smaller than the length of the lower longitudinal sides of the longitudinal frame members 20 of the lifting frame 18, ie the distance of the edges of the two inclined end faces 24 there. The lifting rollers 26 can thus roll up to the edges of the end faces 24, without the two pulling devices 34 abut each other and hinder each other.

Die geschlossenen Seiten der Zugeinrichtungen 34 sind jeweils durch einen geraden langgestreckten Spindelmutterträger 42 mit einer mittigen Spindelmutter 44 gebildet. Die Spindelmutterträger 42 verlaufen senkrecht zu den Zugstangen 36 in einer gemeinsamen horizontalen Ebene mit diesen. Sie sind einander zugewandt, wobei ihre Spindelmuttern 44 koaxial verlaufen.The closed sides of the drawbars 34 are each formed by a straight elongated stem nut carrier 42 having a central spindle nut 44. The Spindelmutterträger 42 extend perpendicular to the tie rods 36 in a common horizontal plane with these. They face each other with their spindle nuts 44 coaxial.

Durch die Spindelmuttern 44 führt eine Spindel 46 mit einem etwa in der Mitte wechselnden gegenläufigen Gewinde, welches in den Figuren 1 und 2 nicht gezeigt ist. Durch axiales Drehen der Spindel 46 sind so die Spindelmutterträger 42 synchron aufeinander zu oder voneinander weg bewegbar. Hierbei üben sie eine entsprechende Antriebskraft in horizontaler Richtung auf ihre Zugstangen 36 und über diese auf die Achsen 28 und die Heberollen 26 aus.Through the spindle nuts 44 performs a spindle 46 with an approximately in the middle changing counter-rotating thread, which in the FIGS. 1 and 2 not shown. By axial rotation of the spindle 46 so the Spindelmutterträger 42 are synchronously toward or away from each other movable. In this case, they exert a corresponding driving force in the horizontal direction on their tie rods 36 and on these on the axes 28 and the lifting rollers 26.

Die Spindel 46 ist an einem Ende, in Figuren 1 und 2 im Hintergrund, mit einem Elektromotor 48 verbunden und mit diesem antreibbar. Der Elektromotor 48 ist auf einem Querträger 50 am Grundrahmen 12 befestigt. Er ist über nicht gezeigte Leitungen mit einer ebenfalls nicht gezeigten Steuereinrichtung verbunden.The spindle 46 is at one end, in FIGS. 1 and 2 in the background, connected to an electric motor 48 and with this drivable. The electric motor 48 is mounted on a cross member 50 on the base frame 12. It is connected via lines not shown with a control device, also not shown.

Zwischen den Führungsschienen 14 befindet sich darüber hinaus eine Führungseinrichtung 52 für die Zugeinrichtungen 34. Die Führungseinrichtung 52 umfasst zwei parallel zu den Querstreben 16 verlaufende Querträger 50 - auf dem in den Figuren 1 und 2 im Hintergrund liegenden, bereits erwähnten Querträger 50 ist der Elektromotor 50 befestigt -, die mit ihren Enden an den Unterseiten der Führungsschienen 14 befestigt sind.In addition, a guide device 52 for the drawbars 34 is located between the guide rails 14. The guide device 52 comprises two cross members 50 running parallel to the transverse struts 16 - on which in the FIGS. 1 and 2 lying in the background, already mentioned cross member 50 of the electric motor 50 is fixed - which are fixed with their ends to the undersides of the guide rails 14.

Auf den Querträgern 50 liegen zwei Längsträger 54 auf und sind an ersteren fixiert. Die Längsträger 54 erstrecken sich parallel in Längsrichtung des Grundrahmens 12 in einem Bereich zwischen den Zugstangen 36 der Zugeinrichtungen 34.On the cross beams 50 are two longitudinal members 54 and are fixed to the former. The longitudinal members 54 extend parallel in the longitudinal direction of the base frame 12 in an area between the tie rods 36 of the drawbars 34th

Die Spindelmutterträger 42 liegen auf den Längsträgern 54 auf. Sie sind in Längsrichtung des Grundrahmens 12 relativ zu den Längsträgern 54 verschiebbar. Dort wo sie auf den Längsträgern 54 aufliegen, weisen die Spindelmutterträger 42 an ihren Unterseiten Führungsnuten 56 auf, die sich in Längsrichtung der Längsträger 54 erstrecken. In den Führungsnuten 56 tauchen die Längsträger 54 ein und führen so die Spindelmutterträger 42 in horizontaler Längsrichtung.The spindle nut carriers 42 rest on the longitudinal carriers 54. They are displaceable in the longitudinal direction of the base frame 12 relative to the longitudinal members 54. Where they rest on the longitudinal members 54, the Spindelmutterträger 42 on their undersides guide grooves 56 which extend in the longitudinal direction of the longitudinal members 54. The longitudinal members 54 dip into the guide grooves 56 and thus guide the spindle nut carriers 42 in the horizontal longitudinal direction.

Der Hubrahmen 18 und der Grundrahmen 12 sind außerdem über zwei parallele, im Wesentlichen identische Stabilisierungsscheren 58 zur lateralen Stabilisierung des Hubrahmens 18 beim Anheben und Absenken verbunden.The lifting frame 18 and the base frame 12 are also connected via two parallel, substantially identical stabilizing shears 58 for laterally stabilizing the lifting frame 18 during lifting and lowering.

Die Stabilisierungsscheren 58 befinden sich von der Seite betrachtet etwa in der Mitte des Hubtisches 10. Sie sind jeweils oben an der äußeren, nämlich der dem jeweils anderen Längsrahmenteil 20 abgewandten, vertikalen Längsseite des entsprechenden Längsrahmenteils 20 des Hubrahmen 18 befestigt. Unten sind sie an der dem Hubrahmen 18 zugewandten Innenseite, also der jeweils anderen Führungsschiene 14 zugewandten Seite, der entsprechenden Führungsschiene 14 angeordnet. Der Abstand zwischen den Längsrahmenteilen 20 und den entsprechenden Führungsschienen 14 ist so groß, dass die entsprechende Stabilisierungsschere 58 in abgesenktem Zustand des Hubtisches 10 zwischen beiden Platz finden.The stabilizing shears 58 are viewed from the side approximately in the middle of the lifting table 10. They are respectively at the top of the outer, namely the other longitudinal frame part 20 facing away from, vertical longitudinal side of the corresponding longitudinal frame part 20 of the lifting frame 18 attached. Below they are on the lifting frame 18 facing inside, so the other guide rail 14 side facing the corresponding guide rail 14 is arranged. The distance between the longitudinal frame members 20 and the corresponding guide rails 14 is so large that the corresponding stabilizing shears 58 find in the lowered state of the lifting table 10 between the two place.

Die Längsrahmenteile 20 weisen jeweils an ihren äußeren vertikalen Längsseiten etwa mittig eine rechteckige Öffnung 60 für die zugehörige Stabilisierungsschere 58 auf. Die Abmessungen der Öffnungen 60 sind wenigstens so groß, dass die Stabilisierungsscheren 58 beim Anheben und Absenken des Hubtisches 10 ungehindert ausfahren beziehungsweise einfahren können.The longitudinal frame members 20 each have at their outer vertical longitudinal sides approximately centrally a rectangular opening 60 for the associated stabilizing shears 58. The dimensions of the openings 60 are at least so great that the stabilizing shears 58 can freely extend or retract when lifting and lowering the lifting table 10.

Jede Stabilisierungsschere 58 verfügt über zwei gleichlange Schenkel 62, die mittig relativ zueinander schwenkbar verbunden sind.Each stabilizing shears 58 has two legs 62 of equal length, which are pivotally connected centrally relative to one another.

Einer der Schenkel 62 ist mit seinem oberen Ende über einen langen oberen Gelenkzapfen 64 an dem Längsrahmenteil 20 des Hubtisches 10 schwenkbar befestigt. Der obere Gelenkzapfen 64 führt dort von der äußeren vertikalen Längsseite durch die Öffnung 60 hindurch bis zur gegenüberliegenden inneren vertikalen Längsseite, wo er befestigt ist.One of the legs 62 is pivotally attached at its upper end via a long upper pivot pin 64 to the longitudinal frame part 20 of the lifting table 10. The upper pivot pin 64 leads from the outer vertical longitudinal side through the opening 60 therethrough to the opposite inner vertical longitudinal side where it is fixed.

Mit seinem unteren Ende ist der Schenkel 62 über eine nicht gezeigte untere Schenkel-Rolle in der Führungsschiene 14 schwenkbar und in Längsrichtung verschiebbar geführt. Der Durchmesser der unteren Schenkel-Rolle ist kleiner als die vertikale Innenhöhe der Längsführungsschiene 14, so dass sie in vertikaler Richtung etwas Spiel hat.With its lower end of the leg 62 is pivotally guided over a lower leg-roller, not shown, in the guide rail 14 and slidable in the longitudinal direction. The diameter of the lower leg roller is smaller than the vertical inner height of the longitudinal guide rail 14 so that it has some play in the vertical direction.

Der andere Schenkel 62 ist über eine obere Schenkel-Rolle 66 im Inneren des hohlen Längsträgers 54 schwenkbar und in Längsrichtung verschiebbar geführt. Die Achse der oberen Schenkel-Rolle 66 erstreckt sich durch die Öffnung 60 hindurch. Der Durchmesser der oberen Schenkel-Rolle 66 ist kleiner als die vertikale Innenhöhe des Längsrahmenteils 20, so dass sie in vertikaler Richtung etwas Spiel hat.The other leg 62 is pivotally guided over an upper leg roller 66 in the interior of the hollow longitudinal member 54 and displaceable in the longitudinal direction. The axis of the upper leg roller 66 extends through the opening 60 therethrough. The diameter of the upper leg roller 66 is smaller than the vertical inner height of the longitudinal frame part 20 so that it has some play in the vertical direction.

Mit seinem unteren Ende ist der andere Schenkel 62 über einen langen unteren Gelenkzapfen 68 an der äußeren vertikalen Längsseite der Führungsschiene 14 schwenkbar befestigt.With its lower end of the other leg 62 is pivotally mounted on a long lower pivot pin 68 on the outer vertical longitudinal side of the guide rail 14.

Der untere Gelenkzapfen 68 befindet sich in der Seitenansicht lotrecht unter dem oberen Gelenkzapfen 64.The lower pivot pin 68 is located in the side view vertically under the upper pivot pin 64th

Beim Anheben des Hubrahmens 18 rollen die oberen Schenkel-Rollen 66 jeweils im Inneren der Längsträger 54 an deren unteren Innenraumfläche und die unteren Schenkel-Rollen in den Führungsschiene 14 an deren oberen Innenraumflächen ab. Beim Absenken rollen die oberen Schenkel-Rollen 66 oben und die unteren Schenkel-Rollen 66 unten ab.When lifting the lifting frame 18, the upper leg rollers 66 each roll in the interior of the side members 54 at the lower interior surface and the lower leg rollers in the guide rail 14 at the upper interior surfaces thereof. When lowering, the upper leg rollers 66 roll up and the lower leg rollers 66 down.

Die Stabilisierungsscheren 58 verhindern, dass der Hubrahmen 18 beim Verschieben der Heberollen 26 diesen horizontal in Längsrichtung statt ausschließlich in vertikaler Richtung ausweicht.The stabilizing shears 58 prevent the lifting frame 18 when moving the lifting rollers 26 this horizontally evades in the longitudinal direction, instead of exclusively in the vertical direction.

Zum Anheben des Hubrahmens 18 wird der Elektromotor 48 so angesteuert, dass er die Spindel 46 mit einer konstanten Drehzahl antreibt. Die Spindel 46 schraubt sich in die beiden Spindelmuttern 44 ein. Hierdurch werden die beiden Zugeinrichtungen 34 aufeinander zu gezogen. Die zum Anheben des Hubrahmens 18 erforderliche Motorleistung ist über den gesamten Hubvorgang konstant. Sie ist etwa halb so groß wie die erforderliche maximale Motorleistung bei vergleichbaren aus dem Stand der Technik bekannten Hubtischen mit Exzenterscheiben.To lift the lifting frame 18, the electric motor 48 is driven so that it drives the spindle 46 at a constant speed. The spindle 46 screws into the two spindle nuts 44 a. As a result, the two pulling devices 34 are pulled towards each other. The motor power required to lift the lifting frame 18 is constant throughout the lifting process. It is about half the required maximum engine power comparable known from the prior art lifting tables with eccentric discs.

Die Erfindung ist nicht beschränkt auf Hubtische 10 für kleine Hubhöhen zwischen 5 cm und 10 cm, vielmehr können auch solche für Hubhöhen mit mehr als 10 cm und/oder bei entsprechend kleinerem Rollendurchmesser weniger als 5 cm realisiert werden.The invention is not limited to lifting tables 10 for small lifting heights between 5 cm and 10 cm, but can also be realized for lifting heights of more than 10 cm and / or with correspondingly smaller roll diameter less than 5 cm.

Der Hubtisch 10 kann auch für Nutzlasten von mehr oder weniger als 1000 kg ausgelegt sein.The lift table 10 can also be designed for payloads of more or less than 1000 kg.

Der Grundrahmen 12 kann zusätzlich an seiner Unterseite über Räder verfügen, so dass der Hubtisch 10 fahrbar ist.The base frame 12 may additionally have on its underside on wheels, so that the lifting table 10 is mobile.

Statt des Elektromotors 48 kann auch ein andersartiges Antriebsmittel, beispielsweise ein Verbrennungsmotor, ein hydraulischer Antrieb oder ein Druckluft-Antrieb, vorgesehen sein.Instead of the electric motor 48, a different kind of drive means, for example an internal combustion engine, a hydraulic drive or a compressed air drive, may be provided.

Das Antriebsmittel kann anstelle der Spindeln 46 mit Spindelmuttern 44 auch wenigstens ein flexibles Zugmittel, beispielsweise ein Seil, und wenigstens eine Aufwickeltrommel aufweist.The drive means may also have at least one flexible traction means, for example a cable, and at least one take-up drum instead of the spindles 46 with spindle nuts 44.

Statt der vier beziehungsweise acht Heberollen 26 und den entsprechenden geneigten Stirnflächen 24 können auch mehr oder weniger Heberollen 26 an entsprechenden geneigten Flächen vorgesehen sein.Instead of the four or eight lifting rollers 26 and the corresponding inclined end faces 24, more or fewer lifting rollers 26 may be provided on corresponding inclined surfaces.

Statt der paarweise voneinander weg geneigten Stirnflächen 24 können auch einander zugewandte geneigte Flächen vorgesehen sein. In diesem Fall werden die Heberollen 26 voneinander weg geschoben, um den Hubrahmen 18 anzuheben.Instead of mutually inclined away from each other end faces 24 and facing inclined surfaces may be provided. In this case, the lifting rollers 26 are pushed away from each other to lift the lifting frame 18.

Die Stirnflächen 24 können in ihren ebenen Bereichen auch um mehr oder weniger als 30° gegenüber der Horizontalen geneigt sein. Über den Neigungswinkel kann die Übersetzung der Antriebskraft zur Hubkraft vorgegeben werden.The end faces 24 may also be inclined in their flat areas by more or less than 30 ° relative to the horizontal. About the inclination angle, the translation of the driving force to the lifting force can be specified.

Die Heberollen 26 können auch separat, insbesondere jeweils über eine Spindel 46, angetrieben werden. Es kann auch jede Heberolle 26 auf einer separaten Achse 28 angeordnet sein.The lifting rollers 26 can also be driven separately, in particular via a respective spindle 46. It is also possible to arrange each lift roller 26 on a separate axle 28.

Anstelle der Führungsrollen 32 beim ersten Ausführungsbeispiel können auch andersartige Führungsmittel, beispielsweise Gleitblöcke, verwendet werden.Instead of the guide rollers 32 in the first embodiment, other types of guide means, such as sliding blocks can be used.

Die beiden geneigten Stirnflächen 24 auf derselben Querseite des Hubtisches 10 können auch zusammenhängend sein.The two inclined end faces 24 on the same transverse side of the lifting table 10 may also be continuous.

Statt zwei Stabilisierungsscheren 58 kann auch nur eine oder es können auch mehr als zwei Stabilisierungsscheren 58 vorgesehen sein.Instead of two stabilizing shears 58, only one or more than two stabilizing shears 58 can be provided.

Anstelle der Stabilisierungsscheren 58 kann auch ein andersartiges Stabilisierungsmittel zur lateralen Stabilisierung des Hubrahmens 18 beim Anheben, beispielsweise eine Linearführung, ein Gelenkviereck oder ein Hebel, vorgesehen sein.Instead of the stabilizing shears 58, a different type of stabilizing means for the lateral stabilization of the lifting frame 18 during lifting, for example a linear guide, a four-bar linkage or a lever may be provided.

Claims (5)

  1. Elevating platform in particular for small lifting heights having a basic frame (12), a lifting frame (18) for accommodating a useful load and having at least one driving means (48) for vertically lifting and lowering the lifting frame (18) relative to the basic frame (12),
    wherein
    a) the lifting frame (18) at its underside and/or the basic frame (12) at its upper side has at least two faces (24) inclined relative to the horizontal,
    b) at least two lifting rollers (26) driven by the driving means (48) are guided so as to be movable at least in horizontal direction in such a way that in the course of moving in horizontal direction they roll from below respectively from above along the inclined face (24) in the direction of inclination thereof and in so doing vertically lift respectively lower the lifting frame (18)
    c) the at least two faces (24) having mutually mirror-inverted inclinations in each case relative to the horizontal are disposed symmetrically to a vertical centre plane and two corresponding lifting rollers (26) for vertically moving the lifting frame (18) are movable towards and away from one another,
    characterised in that
    d) the driving means (48) drives a spindle (46) having two oppositely directed threads, by means of which the at least two lifting rollers (26) may be moved in horizontal direction towards and away from one another;
    e) guide rollers (32) are disposed rotatably at both ends of axles (28) which are guided in guide rails (14) of the basic frame (12),
    f) on each axle (28) at least one lifting roller (26) is disposed rotatably independent from the guide rollers (32).
  2. Elevating platform according to claim 1, characterized in that the guide rollers (32) are guided in two horizontal guide rails (14).
  3. Elevating platform according to one of the preceding claims, characterized in that each two lifting rollers (26) are disposed on, and are at least horizontally displaceable by, a common axle (28) and roll on two corresponding faces (24) lying in the same plane inclined relative to the horizontal or on a single coherent face inclined relative to the horizontal.
  4. Elevating platform according to one of the preceding claims, characterized in that the face (24) on the lifting frame (18) at least in the region facing the basic frame (12) is planar, in particular is inclined by an angle of 30° relative to the horizontal.
  5. Elevating platform according to one of the preceding claims, characterized in that the lifting frame (18) and the basic frame (12) are connected by at least one stabilizing device (58) for laterally stabilizing the lifting frame (18) during lifting.
EP07724451A 2006-05-03 2007-04-23 Elevating platform, in particular for small lifting heights Not-in-force EP2013134B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006020771A DE102006020771B3 (en) 2006-05-03 2006-05-03 Lifting table especially for small lifting heights
PCT/EP2007/003519 WO2007124878A1 (en) 2006-05-03 2007-04-23 Elevating platform, in particular for small lifting heights

Publications (3)

Publication Number Publication Date
EP2013134A1 EP2013134A1 (en) 2009-01-14
EP2013134B1 true EP2013134B1 (en) 2012-08-01
EP2013134B8 EP2013134B8 (en) 2012-09-26

Family

ID=38169306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07724451A Not-in-force EP2013134B8 (en) 2006-05-03 2007-04-23 Elevating platform, in particular for small lifting heights

Country Status (4)

Country Link
EP (1) EP2013134B8 (en)
CN (1) CN101432217B (en)
DE (1) DE102006020771B3 (en)
WO (1) WO2007124878A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101885121B (en) * 2010-06-10 2012-06-06 无锡华联科技集团有限公司 Lifting roller mechanism for conveying steel plates
DE102012018809B4 (en) 2012-09-24 2018-03-29 Sopap Automation Sas Motorized vertical height adjustable lift table for use in the bodywork of the automotive industry
FR3064618A1 (en) * 2017-03-31 2018-10-05 Florian Bourdeau HEIGHT ADJUSTABLE DEVICE FOR SUPPORTING MOTORCYCLE WHEELS

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Publication number Priority date Publication date Assignee Title
AT44715B (en) 1909-09-18 1910-10-25 Ad Richard Schulze Artificial grindstone for the production of wood pulp.
US3048366A (en) * 1958-09-29 1962-08-07 Clark Equipment Co Lift linkage for low platform hand trucks
DE1175852B (en) * 1963-03-05 1964-08-13 Geilinger & Co Lifting platform
FR2314133A1 (en) * 1975-06-11 1977-01-07 Mactaggart Scott Aircraft lifting mechanism for use on ship - has end of pivoting supporting member moved over cam face by driving member
US4585212A (en) * 1984-12-07 1986-04-29 International Business Machines Corporation Lift device of the scissor-jack type
ATE44715T1 (en) * 1985-04-16 1989-08-15 Hymo Ab HYDRAULIC LIFT.
DE3639651A1 (en) * 1986-11-20 1988-06-01 Weckenmann Maschinen Und Stahl Lifting device that can be suspended from a crane for bulky workpieces
US5294179A (en) * 1992-05-11 1994-03-15 Hand Machine Company, Inc. Retrofittable chair lifting and tilting device
US5294379A (en) 1992-09-18 1994-03-15 Johnson & Johnson Vision Products, Inc. Laser assisted demolding of ophthalmic lenses
JP4315564B2 (en) 2000-03-15 2009-08-19 前田建設工業株式会社 Object lifting device and segment supply device using the same
FR2837193A1 (en) * 2002-03-12 2003-09-19 Transportes Continuos Interior Scissors elevator table comprises arms mounted on pivot pin and pressure spindles displaced by motors acting on arm side to cause raising or descent of table surface
CN1282596C (en) * 2004-07-23 2006-11-01 浙江大学 Lifting device of vehicle detecting system

Also Published As

Publication number Publication date
CN101432217A (en) 2009-05-13
EP2013134B8 (en) 2012-09-26
EP2013134A1 (en) 2009-01-14
WO2007124878A1 (en) 2007-11-08
CN101432217B (en) 2013-06-19
DE102006020771B3 (en) 2008-01-10

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