EP0277509A1 - Vehicle jack - Google Patents

Vehicle jack Download PDF

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Publication number
EP0277509A1
EP0277509A1 EP88100416A EP88100416A EP0277509A1 EP 0277509 A1 EP0277509 A1 EP 0277509A1 EP 88100416 A EP88100416 A EP 88100416A EP 88100416 A EP88100416 A EP 88100416A EP 0277509 A1 EP0277509 A1 EP 0277509A1
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EP
European Patent Office
Prior art keywords
crank
rods
threaded spindle
rod
jack
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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
EP88100416A
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German (de)
French (fr)
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EP0277509B1 (en
Inventor
Ferdinand Alten
Willi Erschens
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ThyssenKrupp Bilstein GmbH
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August Bilstein GmbH
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Publication of EP0277509A1 publication Critical patent/EP0277509A1/en
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    • 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
    • B66F13/00—Common constructional features or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/12—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated comprising toggle levers

Definitions

  • the invention relates to a jack with a support leg, with a support arm pivotable thereon about a fixed horizontal axis, with a threaded spindle which is articulated on the support leg and acts on the support arm directly or with lever arms, and with a hand crank which connects with the threaded spindle can be coupled like a universal joint and has two crank rods of approximately the same length, which are connected to one another in an articulated manner.
  • Jacks of this type are known in different embodiments.
  • So-called scissor lifts are widespread, in which the supporting leg and the support arm are part of a parallelogram of the handlebar, the bottom-side handlebar of a foot piece and the vehicle-side handlebar of a headpiece, and their common joints for stretching and together flaps of the parallelogram are engaged with the threaded spindle, which has a substantially horizontal arrangement.
  • jacks are known, e.g. B. from DE-GM 75 15 652, in which the support arm is articulated at the upper end of the supporting leg, as well as the threaded spindle, which on the other hand engages an articulated axis of a pair of lever arms, one lever arm of which acts on the supporting leg and the other lever arm on the supporting arm, so that the support arm and the support leg is spread when the threaded spindle is actuated with the aid of the lever arm pair.
  • Jacks are also known, e.g. B. from DE-GM 75 14 860, in which the fixed horizontal axis of the support arm is arranged in the region between a foot of the support leg and the articulation of the threaded spindle carried out at the upper end of the support leg, which on the other hand is articulated on the support arm.
  • the two latter embodiments of jacks are designed with a fixed crank handle.
  • This crank is designed as a wobble crank in order to be able to crank freely near the ground and to be able to fold the crank parallel to the jack in the transport position.
  • a hand crank intended for a scissor jack which can be coupled to the spindle end by means of a hook and eye and can be stowed separately for accommodation in the motor vehicle, ensures greater freedom when operating the jack.
  • This generally known hand crank of the scissor car jack is in two parts, the two crank rods being connected with a joint, so that the length of the hand crank for transportation in the motor vehicle can be reduced by folding the crank rods together.
  • the two-part is used exclusively the extension, with an L-shaped crank for cranking being present on part of the crank.
  • the invention has for its object to improve a jack of the type mentioned so that the operating forces of the jack when cranking are as small as possible with the hand crank.
  • the connecting joint thus ensures a certain angular position of the two crank rods relative to one another when the hand crank is actuated or when the motor vehicle is raised.
  • the known connecting joint does not serve to extend the hand crank, for which purpose it should serve an easy-to-use hand crank with two aligned crank rods, but rather that the connecting joint allows a certain angular position to be maintained between the two crank rods.
  • the angular position of the two crank rods relative to one another means that the crank rod on the lifting side deviates to a greater extent from its extended position with the threaded spindle, namely the hand crank without contacting the ground and to be able to operate without pivoting the crank rod on the actuating side.
  • the hand crank can be designed so that it is not only too small forces when lifting the vehicle, but also enables comfortable cranking at a distance from the ground. This is particularly important for vehicles with a low floor height or with spoilers protruding in the area where the jack is attached.
  • the connecting joint is a folding joint with a folding limit stop. This allows a structurally simple design of the articulated connection of the two crank rods, as well as a task of determining the angular position of the crank rods when actuating the jack, for example if it is located deep below the motor vehicle, or there are particularly protruding spoilers, which is a deviation of the crank rod on the lifting side from their extended position with the threaded spindle not or not to the desired extent.
  • the hand crank is then a wobble crank with a variable crank radius.
  • the crank rod has a U-shaped joint piece, in the U-leg of which a cranked end of the other crank rod engages, which has a projection determining the angular position by contact with the joint piece.
  • the crank rod on the lifter side has a holding sleeve rotatable on it in the vicinity of the connecting joint and / or the crank rod on the actuation side has a cranked crank end on the actuation side, if necessary provided with a crank knob.
  • the rotatable holding sleeve permits manual control of the crank rod or hand crank in order to be able to hold it effectively in a simple manner in the use of car lifting, without the crank rod on the surface rubbing against the surface of the holding hand or soiling it.
  • the rotatable holding sleeve ensures that both hands of the operator can hold the crank well, in particular without rubbing crank parts on the palms of the hands.
  • the actuation-side crank rod can be folded out of the actuation position having the specific angular position of both crank rods, via the extended position of both crank rods, into a transport position parallel to the lifting-side crank rod and back.
  • the hand crank In the transport position, the hand crank is consequently short, so that it can be transported together with the jack, whereby it is attached to the side or clipped on and can also be accommodated in the rim of the spare wheel of the car without requiring additional space.
  • the two crank rods are approximately threaded spindle length.
  • a torsion bar for coupling the hand crank to the threaded spindle there is a torsion bar arranged transversely on the latter and a fork piece fastened to the former, one fork arm of which is a hole which accommodates a ridge of the torsion bar with play and the other fork arm of which is a slot which accommodates the other ridge.
  • This type of assembly of the spindle end with the hand crank also gives the advantage that the jack can be attached to the vehicle by hand without a hand crank, i.e. by turning the spindle end or the rotating web with the hand, which is particularly useful in vehicles with a low floor height or with Area of the attachment point of the spoiler unloading is advantageous. Thereafter, the simple coupling described above can be carried out conveniently and easily at a distance from the operator from the jack and motor vehicle, the hand crank practically having the operating position.
  • the universal joint-like connection of the torsion bar with the fork piece is not released even when the crank rod is located flat above the ground, because no forces occur transversely to the threaded spindle during the crank movement required to lift the jack.
  • the hand crank 10 shown in FIG. 1 has two crank rods 11, 12 which are articulated to one another via a connecting joint 13.
  • the actuation-side crank rod 12 has a cranked end 14 with a rotary knob 15 and a joint-side cranked end 16 which engages in the U-leg of a U-shaped joint piece 17 which is attached to the crank rod 11 on the lifter side.
  • the crank rod 11 on the jack side has a fork piece 19 with fork arms 20, 21 on the lifting side.
  • the fork piece 19 is fastened by riveting its base 22 to the crank rod 11.
  • the fork arm 20 has a hole 23 and the fork arm 21 has a slot 24.
  • the hole 23 is designed as an elongated hole and the slot 24 extends over the entire length of the fork arm 21.
  • Both fork arms 20, 21 are somewhat different from one another at their free ends angled away so that as a result the assembly of the fork piece 19 with the jack 30 is facilitated.
  • a holding sleeve 25 is arranged on the crank rod 11 in the vicinity of the connecting joint 13 and can rotate relative to the crank rod 11 and is fixed axially in a manner not shown, for example by deformation of the crank rod 11 in the region of the end of the holding sleeve 25 on the lifting side.
  • the two crank rods 11, 12 are held together by a projection 43, which is present at the cranked end 16 of the crank rod 12 and prevents it from being pulled out of the U-legs 18 of the joint piece 17.
  • This projection is produced by riveting after inserting the cranked crank end 16 into circular bores of the U-legs 18.
  • the cranked crank rod end 16 has a projection 26 which, for example, before insertion into the U-leg 18. B. was made by squeezing out of the crank rod circumference. To insert this projection 26 between the U-legs 18, the rod-side leg has a keyhole-like opening which allows the projection 26 to be pushed through.
  • the projection 26 is arranged according to FIG. 1 so that it in the shown position of the crank rod 12 prevents its folding movement against the direction of arrow 27 by resting on the bottom 28 of the U-shaped joint piece 17. kEr thus determines the angular position of the two crank rods 11, 12 in the usual actuation position of the hand crank 10.
  • crank rod 12 does not prevent the crank rod 12 from being folded in the direction of the arrow 27, for example to reduce the crank radius or to move the crank rod 12 into the to bring the parallel position shown in Fig. 2 to the crank rod 11 so that the hand crank 10 has a transport position.
  • Fig. 3 shows the side view of a schematically illustrated jack 30, which has a supporting leg 31, on the lower end of which a roller foot 32 is rigidly attached and on the upper end of which a support arm 33 and a threaded spindle 34 are articulated.
  • the support arm 33 has at its upper end an articulated support plate 35 with which the jack 30 is attached in the area of a sill seam of its body 36 for lifting the motor vehicle.
  • the jack has two lever arms 37 which are connected to one another in an articulated manner and to the threaded spindle 34, as well as with their free ends in an articulated manner on the supporting leg 31 on the one hand and on the support arm 33 on the other hand.
  • the jack 30 shown in FIG. 3 differs from the known one in that the free end of the threaded spindle 34 has a torsion bar 41 which is fastened transversely to the threaded spindle 34 and is equally wide at both ends protrudes.
  • This torsion bar 41 interacts with the fork piece 19 of the hand crank 10 in the manner of a universal joint.
  • the fork arm 20 is inserted with its hole 23 over the upper end 42 of the torsion bar 41 in FIG. 3, the fork arm 21 engaging around the lower end of the torsion bar 41 in FIG. 3 with its two axial projections formed by the slot 24 on both sides.
  • the assembly is carried out in such a way that the crank rod 11 is initially inserted with its fork arm 21 onto the rotating web 41 approximately in the direction of the threaded spindle 34, so that the hole 23 of the fork arm 20 comes to lie above the upper end 42, after which a radial movement of the crank rod 11 leads to the engagement of this upper end 42 in the hole 23.
  • the hand crank 10 is suspended in the opposite manner, possibly with a slight swiveling of the crank rod 11 towards the jack 30.
  • Fig. 3 shows that the universal joint-like connection of the coupling and counter-coupling means of the torsion bar 41 and fork piece 19 is also ensured if the crank handle 10 has to be actuated in an angular position of the crank rod 11 relative to the threaded spindle 34 because of the proximity of the ground to the threaded rod 34 and the full crank radius of the crank rod 12 should only be available.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

So that the operating forces of the vehicle jack are as small as possible during cranking, it is designed in such a way that, to connect the two connecting rods (11, 12) in an articulated manner, there is a connecting joint (13) which establishes a certain angular position, differing from 180 DEG , of the two connecting rods (11, 12) during cranking. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Wagenheber mit einem Standbein, mit einem daran um eine festliegende ho­rizontale Achse schwenkbeweglichen Tragarm, mit einer Ge­windespindel, die am Standbein angelenkt ist und am Trag­arm direkt oder mit Hebelarmen gelenkig angreift, und mit einer Handkurbel, die mit der Gewindespindel kreuzgelenk­artig kuppelbar ist und zwei etwa gleichlange Kurbelstan­gen aufweist, die gelenkig miteinander verbunden sind.The invention relates to a jack with a support leg, with a support arm pivotable thereon about a fixed horizontal axis, with a threaded spindle which is articulated on the support leg and acts on the support arm directly or with lever arms, and with a hand crank which connects with the threaded spindle can be coupled like a universal joint and has two crank rods of approximately the same length, which are connected to one another in an articulated manner.

Wagenheber dieser Art sind in unterschiedlichen Aus­führungsformen bekannt. Weitverbreitet sind sogennannte Scherenheber, bei denen das Standbein und der Tragarm Be­standteil eines Lenkerparallelogramms sind, dessen boden­seitige Lenker an einem Fußstück und dessen fahrzeugseiti­ge Lenker an einem Kopfstück gelenkig angreifen, und deren gemeinsamen Gelenke zum Strecken und zum Zusammen­ klappen des Parallelogramms mit der Gewindespindel in Eingriff stehen, die eine im wesentlichen horizontale Anordnung hat.Jacks of this type are known in different embodiments. So-called scissor lifts are widespread, in which the supporting leg and the support arm are part of a parallelogram of the handlebar, the bottom-side handlebar of a foot piece and the vehicle-side handlebar of a headpiece, and their common joints for stretching and together flaps of the parallelogram are engaged with the threaded spindle, which has a substantially horizontal arrangement.

Außerdem sind Wagenheber bekannt, z. B. aus DE-GM 75 15 652, bei denen der Tragarm am oberen Ende des Stand­beins angelenkt ist, wie auch die Gewindespindel, welche andererseits an einer Gelenkachse eines Hebelarmpaares an­greift, dessen einer Hebelarm am Standbein und dessen an­derer Hebelarm am Tragarm angreift, so daß der Tragarm und das Standbein bei Betätigung der Gewindespindel mit Hilfe des Hebelarmpaares gespreizt wird.In addition, jacks are known, e.g. B. from DE-GM 75 15 652, in which the support arm is articulated at the upper end of the supporting leg, as well as the threaded spindle, which on the other hand engages an articulated axis of a pair of lever arms, one lever arm of which acts on the supporting leg and the other lever arm on the supporting arm, so that the support arm and the support leg is spread when the threaded spindle is actuated with the aid of the lever arm pair.

Ferner sind Wagenheber bekannt, z. B. aus DE-GM 75 14 860, bei denen die festliegende horizontale Achse des Tragarms im Bereich zwischen einem Fuß des Standbeins und der am oberen Ende des Standbeins erfolgten Anlenkung der Gewindespindel angeordnet ist, die andererseits am Tragarm gelenkig gelagert ist.Jacks are also known, e.g. B. from DE-GM 75 14 860, in which the fixed horizontal axis of the support arm is arranged in the region between a foot of the support leg and the articulation of the threaded spindle carried out at the upper end of the support leg, which on the other hand is articulated on the support arm.

Die beiden letztgenannten Ausführungsformen von Wagen­hebern sind mit einer fest angebrachten Handkurbel ausgebil­det. Diese Kurbel ist als Taumelkurbel ausgebildet, um in Bodennähe behinderungsfrei kurbeln zu können, und um die Kurbel bei Transportstellung des Wagenhebers parallel zu diesem umklappen zu können.The two latter embodiments of jacks are designed with a fixed crank handle. This crank is designed as a wobble crank in order to be able to crank freely near the ground and to be able to fold the crank parallel to the jack in the transport position.

Eine größere Freiheit beim Betätigen des Wagenhebers gewährleistet eine für einen Scherenheber bestimmte Hand­kurbel, die mit dem Spindelende mittels Haken und Öse kup­pelbar und zur Unterbringung im Kraftfahrzeug separat ver­staubar ist. Diese allgemein bekannte Handkurbel des Sche­renwagenhebers ist zweiteilig, wobei die beiden Kurbelstan­gen mit einem Gelenk verbunden sind, so daß die Länge der Handkurbel für den Transport im Kraftfahrzeug durch Zusammen­klappen der Kurbelstangen reduziert werden kann. Bei dieser bekannten Handkurbel dient die Zweiteiligkeit ausschließlich der Verlängerung, wobei an einem Teil der Kurbel eine L-förmige Abkröpfung zum Kurbeln vorhanden ist.A hand crank intended for a scissor jack, which can be coupled to the spindle end by means of a hook and eye and can be stowed separately for accommodation in the motor vehicle, ensures greater freedom when operating the jack. This generally known hand crank of the scissor car jack is in two parts, the two crank rods being connected with a joint, so that the length of the hand crank for transportation in the motor vehicle can be reduced by folding the crank rods together. In this known hand crank, the two-part is used exclusively the extension, with an L-shaped crank for cranking being present on part of the crank.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, einen Wagenheber der eingangs genannten Art so zu verbessern, daß mit der Handkurbel die Bedienungskräfte des Wagenhebers beim Kurbeln möglichst klein sind.In contrast, the invention has for its object to improve a jack of the type mentioned so that the operating forces of the jack when cranking are as small as possible with the hand crank.

Diese Aufgabe wird dadurch gelöst, daß zur gelenkigen Verbindung der beiden Kurbelstangen ein eine bestimmte von 180° abweichende Winkelstellung der beiden Kurbelstangen beim Kurbeln festlegendes Verbindungsgelenk vorhanden ist.This object is achieved in that for the articulated connection of the two crank rods there is a connecting joint which defines a certain angular position of the two crank rods which deviates from 180 ° when cranking.

Das Verbindungsgelenk gewährleistet also eine bestimm­te Winkelstellung der beiden Kurbelstangen zueinander beim Betätigen der Handkurbel bzw. beim Anheben des Kraftfahrzeugs. Es ist trotz der gelenkigen Verbindung beider Kurbelstangen möglich, die Bedienungskräfte klein zu halten, und zwar durch entsprechend große Länge der betätigungsseitigen Kurbelstan­ge. Für die Erfindung ist also von Bedeutung, daß das an sich bekannte Verbindungsgelenk nicht dazu dient, die Handkurbel zu verlängern, wozu es bei zwei fluchtenden Kurbelstangen ei­ner bedienungsbereiten Handkurbel dienen müßte, sondern daß das Verbindungsgelenk eine bestimmte Winkelstellung zwischen den beiden Kurbelstangen einzuhalten erlaubt.The connecting joint thus ensures a certain angular position of the two crank rods relative to one another when the hand crank is actuated or when the motor vehicle is raised. In spite of the articulated connection of the two crank rods, it is possible to keep the operating forces small, by means of a correspondingly large length of the crank rod on the actuating side. It is therefore important for the invention that the known connecting joint does not serve to extend the hand crank, for which purpose it should serve an easy-to-use hand crank with two aligned crank rods, but rather that the connecting joint allows a certain angular position to be maintained between the two crank rods.

Die Winkelstellung der beiden Kurbelstangen zueinander bedingt, insbesondere bei horizontaler Anordnung der Gewin­despindel und insbesondere bei der Anfangsstellung des Wagen­hebers mit flach über den Boden befindlicher Gewindespindel, daß die heberseitige Kurbelstange in größerem Maße von ihrer Strecklage mit der Gewindespindel abweicht, um nämlich die Handkurbel ohne Bodenberührung und ohne Verschwenken der be­tätigungsseitigen Kurbelstange betätigen zu können. Durch Wahl der bestimmten Winkelstellung in Verbindung mit der Be­messung der Länge der beiden Kurbelstangen läßt, sich die Handkurbel so auslegen, daß sie nicht nur zu kleinen Bedie­ nungskräften beim Anheben des Fahrzeugs beiträgt, son­dern auch ein bequemes Kurbeln mit Abstand vom Boden ermöglicht. Das ist insbesondere wichtig bei Fahrzeugen mit geringer Bodenhöhe oder mit im Bereich der Ansetz­stelle des Wagenhebers ausladenden Spoilern.The angular position of the two crank rods relative to one another, especially when the threaded spindle is arranged horizontally and in particular when the jack is in the initial position with a threaded spindle located flat above the ground, means that the crank rod on the lifting side deviates to a greater extent from its extended position with the threaded spindle, namely the hand crank without contacting the ground and to be able to operate without pivoting the crank rod on the actuating side. By choosing the specific angular position in connection with the dimensioning of the length of the two crank rods, the hand crank can be designed so that it is not only too small forces when lifting the vehicle, but also enables comfortable cranking at a distance from the ground. This is particularly important for vehicles with a low floor height or with spoilers protruding in the area where the jack is attached.

Das Verbindungsgelenk ist ein Klappgelenk mit einem Klappbegrenzungsanschlag. Das erlaubt eine konstruktiv ein­fache Gestaltung der gelenkigen Verbindung der beiden Kur­belstangen, wie auch eine Aufgabe der bestimmenden Winkel­stellung der Kurbelstangen beim Betätigen des Wagenhebers, wenn dieser beispielsweise tief unter dem Kraftfahrzeug ange­ordnet ist, oder besonders ausladende Spoiler vorhanden sind, was eine Abweichung der heberseitigen Kurbelstange von ihrer Strecklage mit der Gewindespindel nicht oder nicht im gewünschten Maße zuläßt. Die Handkurbel ist dann eine Taumel­kurbel mit veränderlichem Kurbelradius.The connecting joint is a folding joint with a folding limit stop. This allows a structurally simple design of the articulated connection of the two crank rods, as well as a task of determining the angular position of the crank rods when actuating the jack, for example if it is located deep below the motor vehicle, or there are particularly protruding spoilers, which is a deviation of the crank rod on the lifting side from their extended position with the threaded spindle not or not to the desired extent. The hand crank is then a wobble crank with a variable crank radius.

Die Kurbelstange hat ein U-förmiges Gelenkstück, in dessen U-Schenkel ein angekröpftes Ende der anderen Kurbel­stange eingreift, die einen durch Anlage an dem Gelenkstück die Winkelstellung bestimmenden Vorsprung hat. Dies ist eine konstruktiv einfache Ausbildusng des Verbindungsgelenks der beiden Kurbelstangen.The crank rod has a U-shaped joint piece, in the U-leg of which a cranked end of the other crank rod engages, which has a projection determining the angular position by contact with the joint piece. This is a structurally simple design of the connecting joint of the two crank rods.

Die heberseitige Kurbelstange hat eine auf ihr drehbare Haltehülse in der Nähe des Verbindungsgelenks und/oder die betätigungsseitige Kurbelstange weist be­tätigungsseitig ein abgekröpftes, bedarfsweise mit einem Kurbelknauf versehenes Kurbelende auf. Die drehbare Halte­hülse gestattet eine Handführung der heberseitigen Kurbel­stange bzw. der Handkurbel, um diese im Anwendungsfall des Wagenhebens in einfacher Weise wirksam festhalten zu können, ohne daß die heberseitige Kurbelstange an der Fläche der haltenen Hand reibt bzw. diese verschmutzt. Insbesondere in Verbindung mit dem Kurbelknauf wird durch die drehbare Haltehülse gewährleistet, daß beide Hände der Bedienungs­person die Handkurbel gut festhalten können, insbesondere ohne reibende Bewegung von Kurbelteilen an den Handflächen.The crank rod on the lifter side has a holding sleeve rotatable on it in the vicinity of the connecting joint and / or the crank rod on the actuation side has a cranked crank end on the actuation side, if necessary provided with a crank knob. The rotatable holding sleeve permits manual control of the crank rod or hand crank in order to be able to hold it effectively in a simple manner in the use of car lifting, without the crank rod on the surface rubbing against the surface of the holding hand or soiling it. In particular in connection with the crank knob, the rotatable holding sleeve ensures that both hands of the operator can hold the crank well, in particular without rubbing crank parts on the palms of the hands.

Die betätigungsseitige Kurbelstange ist aus der die bestimmte Winkelstellung beider Kurbelstangen aufweisenden Betätigungsstellung über die Strecklage beider Kurbelstangen in eine der heberseitigen Kurbelstange parallele Transport­stellung und zurück klappbar. In der Transportstellung ist die Handkurbel infolgedessen kurz, so daß sie zusammen mit dem Wagenheber transportiert werden kann, wobei sie an diesem seitlich angelegt oder festgeklipst wird und ohne zusätz­lichen Platzbedarf auch in der Felge des Reserverads des Wa­gens unterzubringen ist. Hierzu ist es vorteilhaft, daß die beiden Kurbelstangen etwa gewindespindellang sind.The actuation-side crank rod can be folded out of the actuation position having the specific angular position of both crank rods, via the extended position of both crank rods, into a transport position parallel to the lifting-side crank rod and back. In the transport position, the hand crank is consequently short, so that it can be transported together with the jack, whereby it is attached to the side or clipped on and can also be accommodated in the rim of the spare wheel of the car without requiring additional space. For this purpose, it is advantageous that the two crank rods are approximately threaded spindle length.

In Ausgestaltung der Erfindung sind zur Kupplung der Handkurbel mit der Gewindespindel ein an letzterer quer an­geordneter Verdrehsteg und ein an ersterer befestigtes Gabel­stück vorhanden, dessen einer Gabelarm ein ein Stegende des Verdrehstegs mit Spiel aufnehmendes Loch und dessen anderer Gabelarm ein das andere Stegende aufnehmender Schlitz ist.In an embodiment of the invention, for coupling the hand crank to the threaded spindle there is a torsion bar arranged transversely on the latter and a fork piece fastened to the former, one fork arm of which is a hole which accommodates a ridge of the torsion bar with play and the other fork arm of which is a slot which accommodates the other ridge.

Zum Kuppeln der Handkurbel mit dem Ende der Gewinde­spindel ist es also lediglich erforderlich, daß der das Loch aufweisende Gabelarm mit dem Loch über das eine Ende des Verdrehstegs gehängt wird, was auch in Strecklage des Kurbelarms zur Gewindespindel möglich ist, weil der Schlitz des anderen Gabelarms zuvor ohne weiteres und insbesondere ohne Veränderung der Strecklage bzw. der Betätigungsstel­lung der Handkurbel über den Verdrehsteg geschoben werden kann, bevor das Loch des anderen Gabelarms und ein Ende des Verdrehstegs zusammengesteckt und damit die Kupplung voll­zogen wird.To couple the hand crank to the end of the threaded spindle, it is therefore only necessary that the fork arm having the hole is hung with the hole over one end of the torsion bar, which is also possible in the extended position of the crank arm to the threaded spindle, because the slot of the other fork arm previously can be pushed easily and in particular without changing the stretched position or the actuating position of the hand crank over the torsion bar before the hole of the other fork arm and one end of the torsion bar are plugged together and the coupling is thus carried out.

Diese Art des Zusammenbaus des Spindelendes mit der Handkurbel ergibt auch den Vorteil, daß der Wagenheber ohne Handkurbel von Hand am Fahrzeug angesetzt werden kann, also durch Drehen des Spindelendes bzw. des Verdrehstegs mit der Hand, was insbesondere bei Fahrzeugen mit geringer Bodenhöhe oder mit im Bereich der Ansetzstelle des Wagenhebers ausla­denden Spoilern von Vorteil ist. Danach kann die vorbeschrie­bene einfache Kupplung bequem und bei Abstand der Bedienungs­person von Wagenheber und Kraftfahrzeug leicht durchgeführt werden, wobei die Handkurbel praktisch Betätigungslage hat. Die kreuzgelenkartige Verbindung des Verdrehstegs mit dem Ga­belstück wird auch bei flach über den Boden befindlicher he­berseitiger Kurbelstange nicht gelöst, weil bei der zum An­heben des Wagenhebers erforderlichen Kurbelbewegung keine Kräfte quer zur Gewindespindel auftreten.This type of assembly of the spindle end with the hand crank also gives the advantage that the jack can be attached to the vehicle by hand without a hand crank, i.e. by turning the spindle end or the rotating web with the hand, which is particularly useful in vehicles with a low floor height or with Area of the attachment point of the spoiler unloading is advantageous. Thereafter, the simple coupling described above can be carried out conveniently and easily at a distance from the operator from the jack and motor vehicle, the hand crank practically having the operating position. The universal joint-like connection of the torsion bar with the fork piece is not released even when the crank rod is located flat above the ground, because no forces occur transversely to the threaded spindle during the crank movement required to lift the jack.

Die Erfindung wird anhand eines in der Zeichnung dar­gestellten Ausführungsbeispiels näher erläutert. Es zeigt:

  • Fig. 1 eine Ansicht der in Betätigungsstellung befindlichen Handkurbel,
  • Fig. 2 eine gegenüber Fig. 1 um 90° gedreht An­sicht der Handkurbel der Fig. 1 in Richtung A, jedoch in Transportstellung, das heißt mit parallel geklappten Kurbelstangen, und
  • Fig. 3 eine Seitenansicht eines an einem Kraftfahr­zeug angesetzten Wagenhebers mit Handkurbel.
The invention is explained in more detail using an exemplary embodiment shown in the drawing. It shows:
  • 1 is a view of the hand crank in the actuated position,
  • Fig. 2 is a view rotated by 90 ° compared to Fig. 1 of the hand crank of Fig. 1 in the direction A, but in the transport position, that is, with the crank rods folded in parallel, and
  • Fig. 3 is a side view of a jack attached to a motor vehicle with a hand crank.

Die in Fig. 1 dargestellte Handkurbel 10 hat zwei Kurbelstangen 11, 12 die über ein Verbindungsgelenk 13 gelenkig miteinander verbunden sind. Die betätigungssei­tige Kurbelstange 12 hat ein abgekröpftes Ende 14 mit einem Drehknauf 15 und ein gelenkseitiges abgekröpftes Ende 16, das in die U-Schenkel eines U-förmigen Gelenk­stücks 17 eingreift, das an der heberseitigen Kurbelstange 11 befestigt ist. Die heberseitige Kurbelstange 11 hat heberseitig ein Gabelstück 19 mit Gabelarmen 20, 21. Die Befestigung des Gabelstücks 19 erfolgt durch Vernieten seines Boden 22 mit der Kurbelstange 11.The hand crank 10 shown in FIG. 1 has two crank rods 11, 12 which are articulated to one another via a connecting joint 13. The actuation-side crank rod 12 has a cranked end 14 with a rotary knob 15 and a joint-side cranked end 16 which engages in the U-leg of a U-shaped joint piece 17 which is attached to the crank rod 11 on the lifter side. The crank rod 11 on the jack side has a fork piece 19 with fork arms 20, 21 on the lifting side. The fork piece 19 is fastened by riveting its base 22 to the crank rod 11.

Der Gabelarm 20 hat ein Loch 23, und der Gabelarm 21 hat einen Schlitz 24. Das Loch 23 ist als Langloch ausgebil­det und der Schlitz 24 erstreckt sich über die gesamte Länge des Gabelarms 21. Beide Gabelarme 20, 21 sind an ihren freien Enden etwas voneinander weg abgewinkelt, so daß infolgedessen der Zusammenbau des Gabelstücks 19 mit dem Wagenheber 30 er­leichtert wird.The fork arm 20 has a hole 23 and the fork arm 21 has a slot 24. The hole 23 is designed as an elongated hole and the slot 24 extends over the entire length of the fork arm 21. Both fork arms 20, 21 are somewhat different from one another at their free ends angled away so that as a result the assembly of the fork piece 19 with the jack 30 is facilitated.

Auf der Kurbelstange 11 ist eine Haltehülse 25 in der Nähe des Verbindungsgelenks 13 angeordnet, die sich relativ zur Kurbelstange 11 verdrehen kann und axial in nicht dar­gestellter Weise festgelegt ist, beispielsweise durch eine Verformung der Kurbelstange 11 im Bereich des heber­seitigen Endes der Haltehülse 25.A holding sleeve 25 is arranged on the crank rod 11 in the vicinity of the connecting joint 13 and can rotate relative to the crank rod 11 and is fixed axially in a manner not shown, for example by deformation of the crank rod 11 in the region of the end of the holding sleeve 25 on the lifting side.

Der Zusammenhalt der beiden Kurbelstangen 11, 12 erfolgt durch einen Vorsprung 43, der am abgekröpften Ende 16 der Kurbelstange 12 vorhanden ist und verhindert, daß dieses aus den U-Schenkeln 18 des Gelenkstücks 17 herausgezogen werden kann. Dieser Vorsprung wird nach dem Einstecken des abgekröpften Kurbelstangenendes 16 in kreisförmige Bohrungen der U-Schenkels 18 durch Vernieten hergestellt.The two crank rods 11, 12 are held together by a projection 43, which is present at the cranked end 16 of the crank rod 12 and prevents it from being pulled out of the U-legs 18 of the joint piece 17. This projection is produced by riveting after inserting the cranked crank end 16 into circular bores of the U-legs 18.

Das abgekröpfte Kurbelstangenende 16 hat einen Vorsprung 26, der vor dem Einstecken in die U-Schenkel 18 z. B. durch Herausquetschen aus dem Kurbelstangenumfang hergestellt wurde. Zum Einstecken dieses Vorsprungs 26 zwischen die U-Schenkel 18 hat der stangenseitige Schenkel eine schlüssellochartige, das Durchstecken des Vorsprungs 26 erlaubende Öffnung. Der Vor­sprung 26 ist dabei gemäß Fig. 1 so angeordnet, daß er in der dargestellten Stellung der Kurbelstange 12 deren Klapp­bewegung entgegen der Richtung des Pfeils 27 verhindert, indem er am Boden 28 des U-förmigen Gelenkstücks 17 an­liegt. kEr bestimmt also die Winkelstellung der beiden Kurbelstangen 11, 12 bei üblicher Betätigungsstellung der Handkurbel 10. Er verhindert jedoch nicht, daß die Kurbel­stange 12 in Richtung des Pfeils 27 geklappt werden kann, beispielsweise un den Kurbelradius zu verringern, oder um die Kurbelstange 12 in die in Fig. 2 dargestellte Parallel­lage zur Kurbelstange 11 zu bringen, so daß die Handkurbel 10 eine Transportstellung hat.The cranked crank rod end 16 has a projection 26 which, for example, before insertion into the U-leg 18. B. was made by squeezing out of the crank rod circumference. To insert this projection 26 between the U-legs 18, the rod-side leg has a keyhole-like opening which allows the projection 26 to be pushed through. The projection 26 is arranged according to FIG. 1 so that it in the shown position of the crank rod 12 prevents its folding movement against the direction of arrow 27 by resting on the bottom 28 of the U-shaped joint piece 17. kEr thus determines the angular position of the two crank rods 11, 12 in the usual actuation position of the hand crank 10. However, it does not prevent the crank rod 12 from being folded in the direction of the arrow 27, for example to reduce the crank radius or to move the crank rod 12 into the to bring the parallel position shown in Fig. 2 to the crank rod 11 so that the hand crank 10 has a transport position.

Fig. 3 zeigt die Seitenansicht eines schematisch dar­gestellten Wagenhebers 30, der ein Standbein 31 hat, an dessen unterem Ende ein Wälzfuß 32 starr angebracht ist und an dessen oberem Ende ein Tragarm 33 sowie eine Gewinde­spindel 34 angelenkt sind. Der Tragarm 33 hat an seinem oberen Ende eine gelenkige Tragplatte 35, mit der der Wagenheber 30 im Bereich einer Schwellernaht seiner Ka­rosserie 36 zum Anheben des Kraftfahrzeugs angesetzt wird. Außerdem hat der Wagenheber zwei Hebelarme 37, die gelenkig miteinander und mit der Gewindespindel 34 verbunden sind, sowie mit ihren freien Enden gelenkig am Standbein 31 einer­seits und am Tragarm 33 andererseits angreifen. Durch Dreh­betätigung der Gewindespindel 34 können die Hebelarme 37 ge­streckt werden, so daß sich das Standbein 31 und sein Trag­arm 33 entsprechend aufrichten, wobei sich der Wälzfuß auf dem Boden 38 von seiner Anstellfläche 39 auf seine Standfläche 40 abwälzt. Ein derartiger Wagenheber ist beispielsweise in der deutschen Gebrauchsmusterschrift 75 15 642 näher beschrie­ben.Fig. 3 shows the side view of a schematically illustrated jack 30, which has a supporting leg 31, on the lower end of which a roller foot 32 is rigidly attached and on the upper end of which a support arm 33 and a threaded spindle 34 are articulated. The support arm 33 has at its upper end an articulated support plate 35 with which the jack 30 is attached in the area of a sill seam of its body 36 for lifting the motor vehicle. In addition, the jack has two lever arms 37 which are connected to one another in an articulated manner and to the threaded spindle 34, as well as with their free ends in an articulated manner on the supporting leg 31 on the one hand and on the support arm 33 on the other hand. By turning the threaded spindle 34, the lever arms 37 can be stretched so that the support leg 31 and its support arm 33 are raised accordingly, the rolling base on the floor 38 rolling from its contact surface 39 onto its support surface 40. Such a jack is described for example in German utility model 75 15 642.

Der in Fig. 3 dargestellte Wagenheber 30 unterscheidet sich von dem bekannten dadurch, daß das freie Ende der Ge­windespindel 34 einen Verdrehsteg 41 hat, der quer an der Gewindespindel 34 befestigt ist und beidendig gleich weit vorsteht. Dieser Verdrehsteg 41 wirkt mit dem Gabelstück 19 der Handkurbel 10 kreuzgelenkartig zusammen. Hierzu ist der Gabelarm 20 mit seinem Loch 23 über das in Fig. 3 obere Ende 42 des Verdrehstegs 41 gesteckt, wobei der Gabelarm 21 das in Fig. 3 untere Ende des Verdrehstegs 41 mit seinen beiden durch den Schlitz 24 gebildeten axialen Vorsprüngen beidsei­tig umgreift. Der Zusammenbau erfolgt derart, daß die Kur­belstange 11 zunächst etwa in Richtung der Gewindespindel 34 mit ihrem Gabelarm 21 auf den Verdrehsteg 41 gesteckt wird, so daß das Loch 23 des Gabelarms 20 oberhalb des oberen Endes 42 zu liegen kommt, wonach eine Radialbewegung der Kur­belstange 11 zum Eingriff dieses oberen Endes 42 in das Loch 23 führt. Das Abhängen der Handkurbel 10 erfolgt in umgekehr­ter Weise, eventuell unter geringem Schwenken der Kurbelstange 11 zum Wagenheber 30 hin.The jack 30 shown in FIG. 3 differs from the known one in that the free end of the threaded spindle 34 has a torsion bar 41 which is fastened transversely to the threaded spindle 34 and is equally wide at both ends protrudes. This torsion bar 41 interacts with the fork piece 19 of the hand crank 10 in the manner of a universal joint. For this purpose, the fork arm 20 is inserted with its hole 23 over the upper end 42 of the torsion bar 41 in FIG. 3, the fork arm 21 engaging around the lower end of the torsion bar 41 in FIG. 3 with its two axial projections formed by the slot 24 on both sides. The assembly is carried out in such a way that the crank rod 11 is initially inserted with its fork arm 21 onto the rotating web 41 approximately in the direction of the threaded spindle 34, so that the hole 23 of the fork arm 20 comes to lie above the upper end 42, after which a radial movement of the crank rod 11 leads to the engagement of this upper end 42 in the hole 23. The hand crank 10 is suspended in the opposite manner, possibly with a slight swiveling of the crank rod 11 towards the jack 30.

Fig. 3 läßt erkennenm, daß die kreuzgelenkartige Ver­bindung der die Kupplungs- und Gegenkupplungsmittel bil­denden Verdrehsteg 41 und Gabelstück 19 auch gewährleistet ist, wenn die Handkurbel 10 wegen der Bodennähe der Ge­windespindel 34 in einer Winkelstellung der Kurbelstange 11 zur Gewindespindel 34 betätigt werden muß und der volle Kurbelradius der Kurbelstange 12 nur Verfügung stehen soll.Fig. 3 shows that the universal joint-like connection of the coupling and counter-coupling means of the torsion bar 41 and fork piece 19 is also ensured if the crank handle 10 has to be actuated in an angular position of the crank rod 11 relative to the threaded spindle 34 because of the proximity of the ground to the threaded rod 34 and the full crank radius of the crank rod 12 should only be available.

Claims (7)

1. Wagenheber mit einem Standbein, mit einem daran um eine festliegende horizontale Achse schwenkbe­weglichen Tragarm, mit einer Gewindespindel, die am Standbein angelenkt is und am Tragarm direkt oder mit Hebelarmen gelenkig angreift, und mit einer Handkurbel, die mit der Gewindespindel kreuz­gelenkartig kuppelbar ist und zwei etwa gleichlange Kurbelstangen aufweist, die gelenkig miteinander verbunden sind, dadurch gekenn­zeichnet, daß zur gelenkigen Verbindung der beiden Kurbelstangen (11, 12) ein eine bestimmte von 180° abweichende Winkelstellung der beiden Kurbel­stangen (11, 12) beim Kurbeln festlegendes Verbin­dungsgelenk (13) vorhanden ist.1.Car jack with a support leg, with a support arm which can be pivoted about a fixed horizontal axis, with a threaded spindle which is articulated on the support leg and which acts on the support arm directly or with lever arms, and with a hand crank which can be coupled to the threaded spindle in a universal joint-like manner and has two crank rods of approximately the same length, which are connected to one another in an articulated manner, characterized in that, for the articulated connection of the two crank rods (11, 12), a connecting joint (13) which fixes a certain angular position of the two crank rods (11, 12) when cranking, is available. 2. Wagenheber nach Anspruch 1, dadurch ge­kennzeichnet, daß das Verbindungsgelenk (13) ein Klappgelenk mit Klappbegrenzungsanschlag (Vorsprung 26) ist.2. Jack according to claim 1, characterized in that the connecting joint (13) is a folding joint with a folding limit stop (projection 26). 3. Wagenheber nach einem der Ansprüche 1 oder 2, da­durch gekennzeichnet, daß die Kurbelstange (11) ein U-förmiges Gelenkstück (17) hat, in dessen U-Schenkel (18) ein abgekröpftes Ende (16) der anderen Kurbelstange (12) eingreift, die einen durch Anlage an dem Gelenkstück (17) die Winkelstellung bestimmenden Vorsprung (26) hat.3. Jack according to one of claims 1 or 2, characterized in that the crank rod (11) has a U-shaped joint piece (17), in the U-leg (18) a cranked end (16) of the other crank rod (12) engages which has a projection (26) which determines the angular position by abutment on the joint piece (17). 4. Wagenheber nach einem der Ansprüche 1 bis 3, da­durch gekennzeichnet, daß die heberseitige Kurbelstange (11) eine auf ihr drehbare Haltehülse (25) in der Nähe des Verbindungsgelenks (13) hat und/oder daß die betätigungsseitige Kurbel­stange (12) betätigungsseitig ein abgekröpftes, be­darfsweise mit einem Kurbelknauf (150 versehenes Kur­belende (14) aufweist.4. Jack according to one of claims 1 to 3, characterized in that the lifting-side crank rod (11) rotatable on it Has holding sleeve (25) in the vicinity of the connecting joint (13) and / or that the crank rod (12) on the actuating side has a cranked crank end (14) provided with a crank knob (150) if necessary. 5. Wagenheber nach einem der Ansprüche 1 bis 4, da­durch gekennzeichnet, daß die betätigungsseitige Kurbelstange (12) aus der die bestimmte Winkelstellung beider Kurbelstangen (11, 12) aufweisenden Betätigungsstellung über eine Strecklage beider Kurbelstangen (11, 12) in eine der heberseitigen Kurbelstange (11) parallele Trans­portstellung und zurück klappbar ist.5. Jack according to one of claims 1 to 4, characterized in that the actuation-side crank rod (12) from the specific angular position of both crank rods (11, 12) having the actuation position over an extended position of both crank rods (11, 12) in one of the lifter-side crank rod (11) parallel transport position and can be folded back. 6. Wagenheber nach einem der Ansprüche 1 bis 5, da­durch gekennzeichnet, daß die Kurbelstangen (11, 12) etwa gewindespindellang sind.6. Jack according to one of claims 1 to 5, characterized in that the crank rods (11, 12) are approximately threaded spindle length. 7. Wagenheber nach einem der Ansprüche 1 bis 6, da­durch gekennzeichnet, daß zur Kupplung der Handkurbel (10) mit der Gewindespindel (34) ein an letzterer quer angeordneter Verdrehsteg (41) und ein an ersterer befestigtes Gabelstück (19) vorhanden sind, dessen einer Gabelarm (20) ein ein Stegende (42) des Verdrehstegs (41) mit Spiel auf­nehmendes Loch (23) und dessen anderer Gabelarm (21) ein das andere Stegende aufnehmender Schlitz (24) ist.7. Jack according to one of claims 1 to 6, characterized in that for coupling the hand crank (10) with the threaded spindle (34) a transverse to the latter arranged torsion bar (41) and a fork piece (19) attached to the former are provided, the one fork arm (20) is a web end (42) of the torsion bar (41) with play receiving hole (23) and the other fork arm (21) is a slot (24) receiving the other web end.
EP88100416A 1987-02-05 1988-01-14 Vehicle jack Expired - Lifetime EP0277509B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8701736U DE8701736U1 (en) 1987-02-05 1987-02-05 Car jack
DE8701736U 1987-02-05

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EP0277509A1 true EP0277509A1 (en) 1988-08-10
EP0277509B1 EP0277509B1 (en) 1991-03-20

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ES (1) ES2012021B3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651491A1 (en) * 1989-09-05 1991-03-08 Fabrication Accessoires Automo Jack for raising a load, and particularly, a motor vehicle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8701736U1 (en) * 1987-02-05 1987-04-09 August Bilstein GmbH & Co KG, 5828 Ennepetal Car jack
DE8902808U1 (en) * 1989-03-08 1989-05-03 August Bilstein GmbH & Co KG, 5828 Ennepetal Car jack
DE4024809A1 (en) * 1990-08-04 1992-02-06 Storz E A Kg CAR LIFT
TWM315184U (en) * 2006-12-12 2007-07-11 Tien I Ind Co Ltd Joystick structure of jack

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479362A (en) * 1945-12-22 1949-08-16 Jackson Wilbur Jack
US2704199A (en) * 1953-08-27 1955-03-15 Alton M Olson Jack
CH483360A (en) * 1968-04-11 1969-12-31 Tangyes Ltd Jack
FR2273752A1 (en) * 1974-06-07 1976-01-02 Bilstein August JACK FOR MOTOR VEHICLES
GB2030107A (en) * 1978-09-27 1980-04-02 Takraf Schwermasch Coupling between a mechanical lifting jack and operating handle
FR2510090A1 (en) * 1981-07-22 1983-01-28 Florimond Chabardes Outil Astr Scissors linkage car jack - has uneven length upper arms and worked by hexagon headed trapezoidal threaded screw
US4586696A (en) * 1985-10-25 1986-05-06 Chrysler Corporation Vehicle lifting jack with integral stowable crank handle
DE8701736U1 (en) * 1987-02-05 1987-04-09 August Bilstein GmbH & Co KG, 5828 Ennepetal Car jack

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479362A (en) * 1945-12-22 1949-08-16 Jackson Wilbur Jack
US2704199A (en) * 1953-08-27 1955-03-15 Alton M Olson Jack
CH483360A (en) * 1968-04-11 1969-12-31 Tangyes Ltd Jack
FR2273752A1 (en) * 1974-06-07 1976-01-02 Bilstein August JACK FOR MOTOR VEHICLES
GB2030107A (en) * 1978-09-27 1980-04-02 Takraf Schwermasch Coupling between a mechanical lifting jack and operating handle
FR2510090A1 (en) * 1981-07-22 1983-01-28 Florimond Chabardes Outil Astr Scissors linkage car jack - has uneven length upper arms and worked by hexagon headed trapezoidal threaded screw
US4586696A (en) * 1985-10-25 1986-05-06 Chrysler Corporation Vehicle lifting jack with integral stowable crank handle
DE8701736U1 (en) * 1987-02-05 1987-04-09 August Bilstein GmbH & Co KG, 5828 Ennepetal Car jack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651491A1 (en) * 1989-09-05 1991-03-08 Fabrication Accessoires Automo Jack for raising a load, and particularly, a motor vehicle

Also Published As

Publication number Publication date
ES2012021A4 (en) 1990-03-01
DE8701736U1 (en) 1987-04-09
ES2012021B3 (en) 1991-11-16
DE3862035D1 (en) 1991-04-25
EP0277509B1 (en) 1991-03-20

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