EP0320613A1 - Vehicle jack - Google Patents

Vehicle jack Download PDF

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Publication number
EP0320613A1
EP0320613A1 EP88118491A EP88118491A EP0320613A1 EP 0320613 A1 EP0320613 A1 EP 0320613A1 EP 88118491 A EP88118491 A EP 88118491A EP 88118491 A EP88118491 A EP 88118491A EP 0320613 A1 EP0320613 A1 EP 0320613A1
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EP
European Patent Office
Prior art keywords
spindle nut
metal bracket
support
segments
jack according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88118491A
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German (de)
French (fr)
Other versions
EP0320613B1 (en
Inventor
Willi Erschens
Ferdinand Alten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Bilstein GmbH
Original Assignee
August Bilstein GmbH
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Filing date
Publication date
Application filed by August Bilstein GmbH filed Critical August Bilstein GmbH
Publication of EP0320613A1 publication Critical patent/EP0320613A1/en
Application granted granted Critical
Publication of EP0320613B1 publication Critical patent/EP0320613B1/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
    • 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 on which a support arm pivoted about a horizontal axis is articulated, on which a threaded spindle engages, which is articulated on the support leg with a spindle nut made of plastic, which has axle journals in bearing recesses of the sheet metal part trained stand intervenes.
  • the spindle nut of such jacks is often made of plastic because, in conjunction with the threaded spindle made of steel for strength reasons, there is a favorable friction pairing. Therefore, the plastic spindle nut is preferably used where the manual forces to move the spindle when lifting the trolley are to be kept low or a substantial load has to be lifted.
  • a disadvantage of the known jacks is that the axle journals have only a small contact area in the mainstay because the bearing recesses of this sheet metal part are punched and, due to the low material thickness of the sheet metal, have only correspondingly small dimensions. This results in a very high surface pressure, which can lead to the fact that the axle journals are overstressed.
  • the axle journals rotate in the bearing recesses or on their narrow surfaces during the lifting of the motor vehicle, so that damage to the axle journals when the vehicle is raised several times or when lifting higher loads cannot be excluded. With increasing wear, the changing radii result in an increase in the load on the axle journals, which contributes to their rapid wear. This can result in the destruction of the trunnion and the jack becoming unusable.
  • the invention is therefore based on the object of improving a jack of the type mentioned in such a way that the durability of the spindle nut is increased significantly and certainly.
  • the ends of the spindle of the spindle nut no longer rest directly on the narrow webs of the supporting leg, but are supported on support segments. These perform the relative movements to the mainstay required when the motor vehicle is lifted, so that the axle journals made of plastic are no longer subjected to sliding movements.
  • the support segments provide the spindle of the spindle nut with a sufficiently large contact surface so that the surface pressure is reduced in accordance with the material.
  • the design of the support segments is largely independent of the design of the axle journals and can therefore be optimally designed in terms of construction. Tolerances of the metal bracket, the bearing recesses of the The pillar and the journal can move in the usual sizes without there being any fundamental difficulties in adaptation.
  • the metal bracket is a one-piece part, which has the support segments for both journals. So although measures must be taken on two journals, only a single part is necessary to achieve this goal.
  • the form-fitting assembly of the metal bracket with the plastic spindle nut also does not result in any problems, this form-locking being variable within wide limits, provided that it only ensures that the relative position between the metal bracket and the spindle nut is retained.
  • the metal bracket can absorb bending forces with appropriate dimensioning and thus contributes to relieving the load on the spindle nut, which increases its durability, in particular also in the area of the thread of the spindle nut.
  • the metal bracket is a sheet metal bracket with a recess with which the bracket is arranged on a stepped projection of the spindle nut surrounding the threaded spindle.
  • This configuration results in a captive arrangement of the metal bracket on the threaded spindle or on the spindle nut, whereby the offset projection can contribute because it has an internal thread that the forces to be transmitted from the threaded spindle are removed from the spindle nut with a comparatively low load on the nut thread will.
  • the formation of the offset projection is easy because the threaded nut is an injection molded part, in which this projection can be easily molded in the desired configuration.
  • the metal bracket is arranged on the support arm side of the spindle nut and has angled projections against its axle journal, on which the support segments are located.
  • the metal bracket is in a simple manner practically U-shaped with radially outwardly projecting support segments which engage between the axle journals and the narrow webs of the supporting leg.
  • the metal bracket is arranged essentially between the U legs of a U-shaped support leg. This has the advantage that the metal bracket is covered by the pillar and does not interfere outside, for example when operating the jack.
  • the support segments are longer than flaps parallel to the stub axles, and the axles have outer circumferential recesses on the support arm side that accommodate the support segments.
  • the flaps can be dimensioned as long as the load capacity of the material of the axle journals requires and the outer circumferential recesses of the axle journals ensure that the supporting leg does not have to be modified in the area of its bearing recesses, so that there are no strength-influencing circumstances in this area of the supporting leg result in a constructive modification of the mainstay in this area.
  • the axle journals have radially projecting locking ribs at their ends located outside the outer circumferential recesses. These locking ribs engage behind the side walls of the pillar.
  • the metal bracket performs a corresponding function if it has holding lobes parallel to the bends of the metal bracket on its support segments facing the support arm.
  • the narrow webs of the supporting leg are encompassed in the area of the bearing recesses and thereby additionally also the position of the metal bracket on the supporting leg is secured, so that larger tolerances can also occur without the effect of the metal bracket or the mounting of the journal or the plastic spindle nut be affected.
  • the metal bracket is therefore advantageously a stamped part.
  • the jack 1 consists essentially of a pillar 2 of any design, but in the present case with a U-shaped cross section, so that mutually parallel U-legs 2 'are present, which support a horizontal axis 3, on which a support arm 4 is pivotally attached .
  • the lower end of the support leg 2 is provided with a firmly attached foot 17, so that the jack has a positioning surface 18 which ensures that the jack 1 is positioned in the position shown in FIG.
  • the foot 17 rolls around the rolling edge 19 so that it comes to rest on the standing surface 20 when the motor vehicle is fully raised.
  • the support arm 4 which has at its free end 24 a movable support plate 21 with a recess 22 into which, for example, a sill seam of the motor vehicle engages, as a result of which the support arm is immovable on the floor of the motor vehicle.
  • the movable fastening of the support plate 21 with the axle 23 at the free end 24 of the support arm 4 ensures that no rolling movements occur on the floor of the motor vehicle.
  • a threaded spindle 5 is actuated to lift the motor vehicle, which engages on the one hand with a spindle abutment (not shown) on the support arm 4, as is known for example from DE-PS 24 27 443.
  • the threaded spindle 5 is screwed into a spindle nut 6, which with axle journals 7 in bearing recesses 8 of the upper end 2 ⁇ of the supporting leg 2 intervention.
  • the threaded spindle 5 is articulated with a hand crank 25 via a joint piece 26 so that it can be rotated, which results in a longitudinal adjustment in the spindle nut 6 and, as a result, a lifting or lowering of the support arm 4 and thus of the motor vehicle depending on the direction of rotation.
  • the assembly of the spindle nut 6 with the upper end 2 ⁇ of the support leg 2 is carried out in such a way that the bottom 2 ′′′ of the U-shaped support leg 2 is excluded in the area of the spindle nut and in the U-legs 2 'longitudinal slots are provided as bearing recesses 8, about as described in DE-OS 24 38 643.
  • the special installation position and the tensile load on the spindle nut 6 caused by the threaded spindle 5 when the jack 1 is loaded by a motor vehicle mean that the spindle nut 6 cannot slip out of the bearing recesses 8.
  • the spindle nut 6 shown in more detail in FIG. 2 is made of plastic and essentially has a body 27 surrounding the threaded spindle 5, which is designed as a hollow body and has a thread 28 on the inside which corresponds to the thread of the threaded spindle 5, not shown.
  • the axle journals 7 of the spindle nut 6 are provided with a comparatively large diameter D in order to be able to transmit the forces originating from the threaded spindle 5 to the supporting leg 2.
  • the end of the spindle nut 6 on the support arm side is stepped down, so that a projection 13 with a smaller diameter results.
  • a metal bracket 9 is shown in Figure 2, which is essentially a sheet metal tab with a recess 12 which is matched to the outer diameter of the projection 13 so that the bracket 9 can be pushed onto the projection 13. In this position, the metal bracket 9 is arranged after the assembly of the spindle nut 6 with the support leg 2 between the U-legs 2 'in the region of the upper end leg 2..
  • the bracket 9 has two bends 34 projecting in the direction of the axle pins 7, so that the bracket is U-shaped.
  • the ends of the bends 34 carry radially projecting support segments 11 which are at least thick in the supporting leg plate, but preferably somewhat longer.
  • These support segments 11 are axially parallel lobes which are bent in accordance with the outer circumference of the axles 7. They form support surfaces 29 which bear against the journal 7.
  • they form support surfaces 30 which are supported on those narrow webs of the supporting leg 2 which form the bearing recesses 8.
  • the journal 7 with its journal surfaces 31 are supported indirectly via the support segments 11 and by reducing the surface pressure on the supporting leg 2.
  • the axle journals are provided with outer peripheral recesses 14 which are arranged concentrically with the non-reduced outer peripheral surfaces 32 of the axle journals 7. Their extension in the axial direction is comparatively large, preferably over the entire length of the journal 7 and the depth of these outer peripheral recesses 14 corresponds approximately to the sheet thickness of the bracket 9.
  • Retaining tabs 15 are attached to the support segments 11, which are parallel to the bends 34 of the metal bracket 9 and extend away from the spindle nut 6 in the direction of the support arm. With these retaining tabs, the bracket 9 engages around the edges of the supporting leg 2 forming the bearing recesses 8. In addition, as far as they extend correspondingly to the outer circumference of the journal 7 or their outer circumferential surfaces 32, they are engaged by locking ribs 16 which extend outside the area of the outer circumferential recesses 14 the ends of the journal 7 are attached.
  • the spindle nut 6 also has spacing edges 33 which, together with the locking ribs 16, form the groove shown in FIG. 2, the bottom of which is the outer peripheral surface 32.
  • the groove formed in this way or the spacing edge 33 of the spindle nut are arranged so that the distance between the U-legs 2 'of the supporting leg 2 is filled. Only in the area of the outer peripheral recesses 14 are the spacing edges 33 offset from the threaded spindle in order to make room for the engagement of the bends 34 of the bracket 9.
  • the outer diameter of the body 27 of the spindle nut 6 does not need to be reduced, because the distance between the U-legs 2 'for stability reasons of the supporting leg 2 must be larger than the outer diameter of the body 27, so that the arrangement of the bracket 9th no waiver of the spindle nut strength means.

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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)
  • Jib Cranes (AREA)

Abstract

Vehicle jack (1) with a standing leg (2) to which a supporting arm (4) pivotable about a horizontal axis (3) is linked. Acting on the supporting arm (4) is a threaded spindle (5) which is mounted in articulated manner on the standing leg (2) by means of a plastic spindle nut (6) which, with swivel pins (7), engages in bearing recesses (8) of the standing leg (2) designed as a shaped sheet-metal part. In order to improve a vehicle jack (1) of the type mentioned at the beginning in such a way that the durability of the spindle nut (6) is substantially increased and increased with certainty, the jack is designed in such a way that a metal stirrup (9) is present which is assembled in a positive-locking manner with the plastic spindle nut (6) and has on its ends (10) supporting segments (11) covering the swivel pins (7) of the spindle nut (6) in the area of the bearing recesses (8) of the standing leg (2). <IMAGE>

Description

Die Erfindung bezieht sich auf einen Wagenheber mit ei­nem Standbein, an dem ein um eine horizontale Achse schwenkbeweglicher Tragarm angelenkt ist, an dem eine Gewin­despindel angreift, die am Standbein mit einer aus Kunst­stoff bestehenden Spindelmutter gelenkig gelagert ist, wel­che mit Achszapfen in Lagerausnehmungen des als Blechform­teil ausgebildeten Standbeins eingreift.The invention relates to a jack with a support leg on which a support arm pivoted about a horizontal axis is articulated, on which a threaded spindle engages, which is articulated on the support leg with a spindle nut made of plastic, which has axle journals in bearing recesses of the sheet metal part trained stand intervenes.

Die Spindelmutter derartiger Wagenheber besteht häufig deswegen aus Kunststoff, weil sich in Verbindung mit der aus Festigkeitsgründen aus Stahl bestehenden Gewindespindel eine günstige Reibungspaarung ergibt. Daher wird die Kunststoff-­Spindelmutter bevorzugt dort eingesetzt, wo die Handkräfte zum Bewegen der Spindel beim Anheben des Wagens klein gehal­ten werden sollen oder eine wesentliche Last anzuheben ist.The spindle nut of such jacks is often made of plastic because, in conjunction with the threaded spindle made of steel for strength reasons, there is a favorable friction pairing. Therefore, the plastic spindle nut is preferably used where the manual forces to move the spindle when lifting the trolley are to be kept low or a substantial load has to be lifted.

Nachteilig ist bei den bekannten Wagenhebern, daß die Achszapfen nur eine kleine Auflagefläche im Standbein haben, weil die Lagerausnehmungen dieses Blechformteils gestanzt sind und infolge der geringen Materialdicke des Blechs nur entsprechend geringe Abmessungen haben. Daraus ergibt sich eine sehr hohe Flächenpressung, die dazu führen kann, daß die Achszapfen überbeansprucht werden. Hinzu kommt, daß sich die Achszapfen während des Anhebens des Kraftfahrzeugs in den Lagerausnehmungen bzw. auf deren schmalen Flächen dre­hen, so daß eine Beschädigung der Achszapfen bei mehrmaligem Anheben des Fahrzeugs bzw. beim Anheben höherer Lasten nicht ausgeschlossen werden kann. Mit zunehmender Abnutzung ergibt sich infolge der sich ändernden Radien eine Erhöhung der Be­lastung der Achszapfen, was zu einem schnellen Verschleiß dieser beiträgt. Daraus kann sich eine Zerstörung der Lager­zapfen ergeben und damit ein Unbrauchbarwerden des Wagenhe­bers.A disadvantage of the known jacks is that the axle journals have only a small contact area in the mainstay because the bearing recesses of this sheet metal part are punched and, due to the low material thickness of the sheet metal, have only correspondingly small dimensions. This results in a very high surface pressure, which can lead to the fact that the axle journals are overstressed. In addition, the axle journals rotate in the bearing recesses or on their narrow surfaces during the lifting of the motor vehicle, so that damage to the axle journals when the vehicle is raised several times or when lifting higher loads cannot be excluded. With increasing wear, the changing radii result in an increase in the load on the axle journals, which contributes to their rapid wear. This can result in the destruction of the trunnion and the jack becoming unusable.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Wagenheber der eingangs genannten Art so zu verbessern, daß die Dauerhaltbarkeit der Spindelmutter wesentlich und mit Sicherheit gesteigert wird.The invention is therefore based on the object of improving a jack of the type mentioned in such a way that the durability of the spindle nut is increased significantly and certainly.

Diese Aufgabe wird dadurch gelöst, daß ein mit der Kunststoff-Spindelmutter formschlüssig zusammengebauter Me­tallbügel vorhanden ist, der an seinen Enden die Achszapfen der Spindelmutter im Bereich der Lagerausnehmungen des Standbeins abdeckende Abstützsegmente aufweist.This object is achieved in that there is a metal bracket which is positively assembled with the plastic spindle nut and which has at its ends the support segments covering the axle journals of the spindle nut in the region of the bearing recesses of the supporting leg.

Für die Erfindung ist zunächst von Bedeutung, daß die Enden der Achszapfen der Spindelmutter nicht mehr direkt auf den schmalen Stegen des Standbeins aufliegen, sondern sich auf Abstützsegmenten abstützen. Diese führen die beim Anhe­ben des Kraftfahrzeugs erforderlichen Relativbewegungen zum Standbein aus, so daß die aus Kunststoff bestehenden Achs­zapfen insoweit nicht mehr mit Gleitbewegungen beansprucht werden. Dabei ist vorteilhaft, daß die Abstützsegmente den Achszapfen der Spindelmutter eine genügend große Auflage­fläche bieten, so daß die Flächenpressung werkstoffgerecht reduziert wird. Hierzu ist es besonders vorteilhaft, daß die Abstützsegmente in ihrer Ausgestaltung weitgehend unabhängig von der Ausgestaltung der Achszapfen ausgebildet und somit in konstruktiver Hinsicht optimal gestaltet werden können. Toleranzen des Metallbügels, der Lagerausnehmungen des Standbeins und der Achszapfen könne sich in üblichen Größen bewegen, ohne daß sich dadurch grundsätzlich Anpassungs­schwierigkeiten ergeben.It is important for the invention that the ends of the spindle of the spindle nut no longer rest directly on the narrow webs of the supporting leg, but are supported on support segments. These perform the relative movements to the mainstay required when the motor vehicle is lifted, so that the axle journals made of plastic are no longer subjected to sliding movements. It is advantageous that the support segments provide the spindle of the spindle nut with a sufficiently large contact surface so that the surface pressure is reduced in accordance with the material. For this purpose, it is particularly advantageous that the design of the support segments is largely independent of the design of the axle journals and can therefore be optimally designed in terms of construction. Tolerances of the metal bracket, the bearing recesses of the The pillar and the journal can move in the usual sizes without there being any fundamental difficulties in adaptation.

Von Bedeutung ist desweiteren, daß der Metallbügel ein einstückiges Teil ist, der die Abstützsegmente für beide Achszapfen aufweist. Obwohl also Maßnahmen an zwei Achszap­fen zu treffen sind, ist nur ein einziges Teil nötig, um dieses Ziel zu erreichen. Der formschlüssige Zusammenbau des Metallbügels mit der Kunststoff-Spindelmutter ergibt eben­falls keine Probleme, wobei dieser Formschluß in weiten Grenzen variabel ist, sofern er nur sichert, daß die Rela­tivlage zwischen Metallbügel und Spindelmutter erhalten bleibt.It is also important that the metal bracket is a one-piece part, which has the support segments for both journals. So although measures must be taken on two journals, only a single part is necessary to achieve this goal. The form-fitting assembly of the metal bracket with the plastic spindle nut also does not result in any problems, this form-locking being variable within wide limits, provided that it only ensures that the relative position between the metal bracket and the spindle nut is retained.

Hinzu kommt letztlich, daß der Metallbügel bei entspre­chender Bemessung Biegekräfte aufnehmen kann und so zu einer Entlastung der Spindelmutter beiträgt, was deren Dauerhaltbarkeit steigert, insbesondere auch im Bereich des Gewindes der Spindelmutter.In addition, there is ultimately the fact that the metal bracket can absorb bending forces with appropriate dimensioning and thus contributes to relieving the load on the spindle nut, which increases its durability, in particular also in the area of the thread of the spindle nut.

Der Metallbügel ist eine Blechlasche mit einer Ausneh­mung, mit der der Bügel auf einem die Gewindespindel um­schließenden abgesetzten Vorsprung der Spindelmutter ange­ordnet ist. Durch diese Ausgestaltung ergibt sich eine un­verlierbare Anordnung des Metallbügels auf der Gewindespin­del bzw. auf der Spindelmutter, wobei der abgesetzte Vor­sprung dazu beitragen kann, weil er Innengewinde aufweist, daß die von der Gewindespindel zu übertragenden Kräfte von der Spindelmutter bei vergleichsweise geringer Belastung des Muttergewindes abgetragen werden. Die Anformung des abge­setzten Vorsprungs ist problemlos, weil die Gewindemutter ein Spritzteil ist, bei dem dieser Vorsprung ohne weiteres in gewünschter Ausgestaltung angeformt werden kann.The metal bracket is a sheet metal bracket with a recess with which the bracket is arranged on a stepped projection of the spindle nut surrounding the threaded spindle. This configuration results in a captive arrangement of the metal bracket on the threaded spindle or on the spindle nut, whereby the offset projection can contribute because it has an internal thread that the forces to be transmitted from the threaded spindle are removed from the spindle nut with a comparatively low load on the nut thread will. The formation of the offset projection is easy because the threaded nut is an injection molded part, in which this projection can be easily molded in the desired configuration.

Der Metallbügel ist tragarmseitig an der Spindelmutter angeordnet und hat gegen deren Achszapfen vorspringende Abwinkelungen, an denen sich die Abstützsegmente befinden. Infolgedessen ist der Metallbügel in einfacher Weise prak­tisch U-förmig mit radial nach außen springenden Abstützseg­menten, die zwischen die Achszapfen und die Schmalstege des Standbeins eingreifen. Bei dieser Ausgestaltung ist der Me­tallbügel im wesentlichen zwischen den U-Schenkeln eines U-­förmigen Standbeins angeordnet. Das hat den Vorteil, daß der Metallbügel vom Standbein abgedeckt wird und außen nicht stört, z.B. bei der Bedienung des Wagenhebers.The metal bracket is arranged on the support arm side of the spindle nut and has angled projections against its axle journal, on which the support segments are located. As a result, the metal bracket is in a simple manner practically U-shaped with radially outwardly projecting support segments which engage between the axle journals and the narrow webs of the supporting leg. In this embodiment, the metal bracket is arranged essentially between the U legs of a U-shaped support leg. This has the advantage that the metal bracket is covered by the pillar and does not interfere outside, for example when operating the jack.

Die Abstütztsegmente sind länger als standbeinblech­starke achszapfenparallele Lappen, und die Achszapfen haben tragarmseitig gelegene, die Abstützsegmente aufnehmende Außenumfangsausnehmungen. Die Lappen können so lang bemessen werden, wie es die Belastbarkeit des Werkstoffs der Achszap­fen erfordert und die Außenumfangsausnehmungen der Achszap­fen sorgen dafür, daß das Standbein im Bereich seiner Lagerausnehmungen nicht abgeändert zu werden braucht, so daß sich in diesem Bereich des Standbeins auch keine festig­keitsbeeinflussenden Umstände ergeben, die eine konstruktive Abänderung des Standbeins in diesem Bereich notwendig werden lassen.The support segments are longer than flaps parallel to the stub axles, and the axles have outer circumferential recesses on the support arm side that accommodate the support segments. The flaps can be dimensioned as long as the load capacity of the material of the axle journals requires and the outer circumferential recesses of the axle journals ensure that the supporting leg does not have to be modified in the area of its bearing recesses, so that there are no strength-influencing circumstances in this area of the supporting leg result in a constructive modification of the mainstay in this area.

Um den Wagenheber im Bereich der Anlenkung der Gewinde­spindel weiter zu stabilisieren und insbesondere die Festle­gung der Spindelmutter zu verbessern, weisen die Achszapfen an ihren außerhalb der Außenumfangsausnehmungen gelegenen Enden radial vorspringende Rastrippen auf. Diese Rastrippen hintergreifen die Seitenwände des Standbeins. Eine entspre­chende Funktion übt der Metallbügel aus, wenn dieser an sei­nen Abstützsegmenten dem Tragarm zugewendete, den Abwinke­lungen des Metallbügels parallele Haltelappen aufweist. Auf diese Weise werden die Schmalstege des Standbeins im Bereich der Lagerausnehmungen umfaßt und dadurch zusätzlich auch die Lage des Metallbügels am Standbein gesichert, so daß auch größere Toleranzen auftreten können, ohne daß die Wirkung des Metallbügels bzw. die Lagerung der Achszapfen oder der Kunststoff-Spindelmutter beeinträchtigt werden. Vorteil­hafterweise ist daher der Metallbügel ein Stanzteil.In order to further stabilize the jack in the area of the articulation of the threaded spindle and in particular to improve the fixing of the spindle nut, the axle journals have radially projecting locking ribs at their ends located outside the outer circumferential recesses. These locking ribs engage behind the side walls of the pillar. The metal bracket performs a corresponding function if it has holding lobes parallel to the bends of the metal bracket on its support segments facing the support arm. In this way, the narrow webs of the supporting leg are encompassed in the area of the bearing recesses and thereby additionally also the position of the metal bracket on the supporting leg is secured, so that larger tolerances can also occur without the effect of the metal bracket or the mounting of the journal or the plastic spindle nut be affected. The metal bracket is therefore advantageously a stamped part.

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

  • Fig. 1 eine Seitenansicht eines Wagenhebers gemäß der Erfindung,
  • Fig. 2 eine Spindelmutter und einen Metallbügel in perspektivischer Darstellung vor ihrem Zusammenbau.
The invention is described with reference to an embodiment shown in the drawing. It shows:
  • 1 is a side view of a jack according to the invention,
  • Fig. 2 is a spindle nut and a metal bracket in perspective before assembly.

Der Wagenheber 1 besteht im wesentlichen aus einem Standbein 2 beliebiger Ausbildung, im vorliegenden Fall je­doch mit U-förmigem Querschnitt, so daß einander parallele U-Schenkel 2′ vorhanden sind, die eine horizontale Achse 3 lagern, an der ein Tragarm 4 schwenkbeweglich befestigt ist. Das untere Ende des Standbeins 2 ist mit einem fest ange­brachten Fuß 17 versehen, so daß der Wagenheber eine An­stellfläche 18 aufweist, die das Anstellen des Wagenhebers 1 in der in Fig.1 dargestellten Lage gewährleistet. Beim Anhe­ben des Kraftfahrzeugs wälzt sich der Fuß 17 um die Wälz­kante 19 so ab, daß er auf der Standfläche 20 zu stehen kommt, wenn das Kraftfahrzeug vollständig angehoben ist.The jack 1 consists essentially of a pillar 2 of any design, but in the present case with a U-shaped cross section, so that mutually parallel U-legs 2 'are present, which support a horizontal axis 3, on which a support arm 4 is pivotally attached . The lower end of the support leg 2 is provided with a firmly attached foot 17, so that the jack has a positioning surface 18 which ensures that the jack 1 is positioned in the position shown in FIG. When the motor vehicle is raised, the foot 17 rolls around the rolling edge 19 so that it comes to rest on the standing surface 20 when the motor vehicle is fully raised.

Zum Anheben des Kraftfahrzeugs muß dieses auf dem Trag­arm 4 aufliegen, der an seinem freien Ende 24 eine bewegli­che Tragplatte 21 mit einer Ausnehmung 22 aufweist, in die beispielsweise eine Schwellernaht des Kraftfahrzeugs ein­greift, wodurch der Tragarm am Boden des Kraftfahrzeugs un­verschieblich ist. Gleichzeitig wird durch die bewegliche Befestigung der Tragplatte 21 mit der Achse 23 am freien Ende 24 des Tragarms 4 erreicht, daß keine Abwälzbewegungen am Boden des Kraftfahrzeugs auftreten.To lift the motor vehicle, this must rest on the support arm 4, which has at its free end 24 a movable support plate 21 with a recess 22 into which, for example, a sill seam of the motor vehicle engages, as a result of which the support arm is immovable on the floor of the motor vehicle. At the same time, the movable fastening of the support plate 21 with the axle 23 at the free end 24 of the support arm 4 ensures that no rolling movements occur on the floor of the motor vehicle.

Desweiteren ist erforderlich, daß zum Anheben des Kraftfahrzeugs eine Gewindespindel 5 betätigt wird, die ei­nerseits mit einem nicht dargestellten Spindelwiderlager am Tragarm 4 angreift, wie es beispielsweise durch die DE-PS 24 27 443 bekannt ist. Die Gewindespindel 5 ist in eine Spindelmutter 6 eingeschraubt, welche mit Achszapfen 7 in Lagerausnehmungen 8 des oberen Endes 2˝ des Standbeins 2 eingreifen. Außerdem ist die Gewindespindel 5 mit einer Handkurbel 25 über ein Gelenkstück 26 gelenkig verbunden, so daß sie gedreht werden kann, wodurch sich eine Längsverstel­lung in der Spindelmutter 6 ergibt und infolgedessen ein je nach Drehrichtung erfolgendes Anheben oder Ablassen des Tragarms 4 und damit des Kraftfahrzeugs.Furthermore, it is necessary that a threaded spindle 5 is actuated to lift the motor vehicle, which engages on the one hand with a spindle abutment (not shown) on the support arm 4, as is known for example from DE-PS 24 27 443. The threaded spindle 5 is screwed into a spindle nut 6, which with axle journals 7 in bearing recesses 8 of the upper end 2˝ of the supporting leg 2 intervention. In addition, the threaded spindle 5 is articulated with a hand crank 25 via a joint piece 26 so that it can be rotated, which results in a longitudinal adjustment in the spindle nut 6 and, as a result, a lifting or lowering of the support arm 4 and thus of the motor vehicle depending on the direction of rotation.

Der Zusammenbau der Spindelmutter 6 mit dem oberen Ende 2˝ des Standbeins 2 erfolgt derart, daß der Boden 2‴ des U-förmigen Standbeins 2 im Bereich der Spindelmutter ausge­nommen ist und in den U-Schenkeln 2′ jeweils Längsschlitze als Lagerausnehmungen 8 vorhanden sind, etwa wie sie in DE-­OS 24 38 643 beschrieben sind. Die spezielle Einbaulage und die durch die Gewindespindel 5 erfolgende Zugbelastung der Spindelmutter 6 bei Belastung des Wagenhebers 1 durch ein Kraftfahrzeug führen dazu, daß die Spindelmutter 6 nicht aus den Lagerausnehmungen 8 herausrutschen kann.The assembly of the spindle nut 6 with the upper end 2˝ of the support leg 2 is carried out in such a way that the bottom 2 ‴ of the U-shaped support leg 2 is excluded in the area of the spindle nut and in the U-legs 2 'longitudinal slots are provided as bearing recesses 8, about as described in DE-OS 24 38 643. The special installation position and the tensile load on the spindle nut 6 caused by the threaded spindle 5 when the jack 1 is loaded by a motor vehicle mean that the spindle nut 6 cannot slip out of the bearing recesses 8.

Die in Fig.2 näher dargestellte Spindelmutter 6 besteht aus Kunststoff und hat im wesentlichen einen die Gewinde­spindel 5 umgebenden Körper 27, der als Hohlkörper aus­gebildet ist und innen ein Gewinde 28 hat, welches dem nicht dargestellten Gewinde der Gewindespindel 5 entspricht. Die Achszapfen 7 der Spindelmutter 6 sind mit einem vergleichs­weise großen Durchmesser D versehen, um die aus der Gewinde­spindel 5 herrührenden Kräfte auf das Standbein 2 übertragen zu können. Das tragarmseitige Ende der Spindelmutter 6 ist abgesetzt, so daß sich ein mit geringerem Durchmesser ausge­bildeter Vorsprung 13 ergibt.The spindle nut 6 shown in more detail in FIG. 2 is made of plastic and essentially has a body 27 surrounding the threaded spindle 5, which is designed as a hollow body and has a thread 28 on the inside which corresponds to the thread of the threaded spindle 5, not shown. The axle journals 7 of the spindle nut 6 are provided with a comparatively large diameter D in order to be able to transmit the forces originating from the threaded spindle 5 to the supporting leg 2. The end of the spindle nut 6 on the support arm side is stepped down, so that a projection 13 with a smaller diameter results.

Desweiteren ist in Fig.2 ein Metallbügel 9 dargestellt, der im wesentlichen eine Blechlasche mit einer Ausnehmung 12 ist, die auf den Außendurchmesser des Vorsprungs 13 so abge­stimmt ist, daß der Bügel 9 auf den Vorsprung 13 aufgescho­ben werden kann. In dieser Stellung ist der Metallbügel 9 nach dem Zusammenbau der Spindelmutter 6 mit dem Standbein 2 zwischen dessen U-Schenkeln 2′ im Bereich des oberen Stand­beinendes 2˝ angeordnet.Furthermore, a metal bracket 9 is shown in Figure 2, which is essentially a sheet metal tab with a recess 12 which is matched to the outer diameter of the projection 13 so that the bracket 9 can be pushed onto the projection 13. In this position, the metal bracket 9 is arranged after the assembly of the spindle nut 6 with the support leg 2 between the U-legs 2 'in the region of the upper end leg 2..

Der Bügel 9 hat zwei in Richtung der Achszapfen 7 vor­springende Abwinkelungen 34, so daß der Bügel U-förmig ist. Die Enden der Abwinkelungen 34 tragen radial vorspringende Abstützsegmente 11 die mindestens standbeinblechstark sind, vorzugsweise aber etwas länger. Diese Abstützsegmente 11 sind achszapfenparallele Lappen, die entsprechend dem Außenumfang der Achszapfen 7 gebogen geformt sind. Sie bil­den Abstützflächen 29, die an den Achszapfen 7 anliegen. Außerdem bilden sie Abstützflächen 30, die sich auf denjeni­gen Schmalstegen des Standbeins 2 abstützen, welche die La­gerausnehmungen 8 bilden. Infolgedessen sind die Achszapfen 7 mit ihren Zapfenflächen 31 über die Abstützsegmente 11 mittelbar und unter Reduzierung der Flächenpressung am Standbein 2 abgestützt.The bracket 9 has two bends 34 projecting in the direction of the axle pins 7, so that the bracket is U-shaped. The ends of the bends 34 carry radially projecting support segments 11 which are at least thick in the supporting leg plate, but preferably somewhat longer. These support segments 11 are axially parallel lobes which are bent in accordance with the outer circumference of the axles 7. They form support surfaces 29 which bear against the journal 7. In addition, they form support surfaces 30 which are supported on those narrow webs of the supporting leg 2 which form the bearing recesses 8. As a result, the journal 7 with its journal surfaces 31 are supported indirectly via the support segments 11 and by reducing the surface pressure on the supporting leg 2.

Um die Lagerausnehmungen 8 des Standbeins 2 nicht ver­größern zu müssen, sind die Achszapfen mit Außenumfangsausnehmungen 14 versehen, welche konzentrisch zu den nicht reduzierten Außenumfangsflächen 32 der Achszapfen 7 angeordnet sind. Ihre Erstreckung in Achsrichtung ist ver­gleichsweise groß, vorzugsweise über die gesamte Länge der Achszapfen 7 und die Tiefe dieser Außenumfangsausnehmungen 14 entspricht etwa der Blechstärke des Bügels 9.In order not to have to enlarge the bearing recesses 8 of the supporting leg 2, the axle journals are provided with outer peripheral recesses 14 which are arranged concentrically with the non-reduced outer peripheral surfaces 32 of the axle journals 7. Their extension in the axial direction is comparatively large, preferably over the entire length of the journal 7 and the depth of these outer peripheral recesses 14 corresponds approximately to the sheet thickness of the bracket 9.

An den Abstützsegmenten 11 sind Haltelappen 15 ange­bracht, die den Abwinkelungen 34 des Metallbügels 9 parallel sind und sich von der Spindelmutter 6 weg in Richtung zum Tragarm erstrecken. Mit diesen Haltelappen umgreift der Bü­gel 9 die die Lagerausnehmungen 8 bildenden Kanten des Standbeins 2. Diese werden außerdem, soweit sie dem Außenumfang der Achszapfen 7 bzw. deren Außenumfangsflächen 32 entsprechend angepaßt verlaufen, von Rastrippen 16 hin­tergriffen, welche außerhalb des Bereichs der Außenumfangsausnehmungen 14 an den Enden der Achszapfen 7 angebracht sind.Retaining tabs 15 are attached to the support segments 11, which are parallel to the bends 34 of the metal bracket 9 and extend away from the spindle nut 6 in the direction of the support arm. With these retaining tabs, the bracket 9 engages around the edges of the supporting leg 2 forming the bearing recesses 8. In addition, as far as they extend correspondingly to the outer circumference of the journal 7 or their outer circumferential surfaces 32, they are engaged by locking ribs 16 which extend outside the area of the outer circumferential recesses 14 the ends of the journal 7 are attached.

Die Spindelmutter 6 hat ferner Distanzkanten 33, welche mit den Rastrippen 16 die aus Fig.2 ersichtliche Nut bilden, deren Grund die Außenumfangsfläche 32 ist. Die auf diese Weise gebildete Nut bzw. die Distanzkante 33 der Spindelmut­ter sind so angeordnet, daß der Abstand zwischen den U-­Schenkeln 2′ des Standbeins 2 ausgefüllt wird. Lediglich im Bereich der Außenumfangsausnehmungen 14 sind die Distanz­kanten 33 zur Gewindespindel hin versetzt, um Platz für den Eingriff der Abwinkelungen 34 des Bügels 9 zu schaffen. Des­wegen braucht der Außendurchmesser des Körpers 27 der Spin­delmutter 6 jedoch nicht reduziert zu werden, weil der Ab­stand zwischen den U-Schenkeln 2′ aus Stabilitätsgründen des Standbeins 2 ohnehin größer sein muß, als der Außendurchmesser des Körpers 27, so daß die Anordnung des Bügels 9 kein Verzicht auf Festigkeit der Spindelmutter be­deutet.The spindle nut 6 also has spacing edges 33 which, together with the locking ribs 16, form the groove shown in FIG. 2, the bottom of which is the outer peripheral surface 32. The groove formed in this way or the spacing edge 33 of the spindle nut are arranged so that the distance between the U-legs 2 'of the supporting leg 2 is filled. Only in the area of the outer peripheral recesses 14 are the spacing edges 33 offset from the threaded spindle in order to make room for the engagement of the bends 34 of the bracket 9. Therefore, the outer diameter of the body 27 of the spindle nut 6 does not need to be reduced, because the distance between the U-legs 2 'for stability reasons of the supporting leg 2 must be larger than the outer diameter of the body 27, so that the arrangement of the bracket 9th no waiver of the spindle nut strength means.

Claims (8)

1. Wagenheber (1) mit einem Standbein (2), an dem ein um eine horizontale Achse (3) schwenkbeweglicher Tragarm (4) angelenkt ist, an dem eine Gewindespindel (5) an­greift, die am Standbein (2) mit einer aus Kunststoff bestehenden Spindelmutter (6) gelenkig gelagert ist, welche mit Achszapfen (7) in Lagerausnehmungen (8) des als Blechformteil ausgebildeten Standbeins (2) ein­greift, dadurch gekennzeichnet, daß ein mit der Kunststoff-Spindelmutter (6) form­schlüssig zusammengebauter Metallbügel (9) vorhanden ist, der an seinen Enden (10) die Achszapfen (7) der Spindelmutter (6) im Bereich der Lagerausnehmungen (8) des Standbeins (2) abdeckende Abstützsegmente (11) auf­weist.1. jack (1) with a support leg (2) on which a support arm (4) which is pivotable about a horizontal axis (3) is articulated, on which a threaded spindle (5) engages, which is on the support leg (2) with a plastic Existing spindle nut (6) is articulated, which engages with axle journals (7) in bearing recesses (8) of the support leg (2) designed as a sheet metal part, characterized in that a metal bracket (9) which is positively assembled with the plastic spindle nut (6) is present which has at its ends (10) the axle journals (7) of the spindle nut (6) in the region of the bearing recesses (8) of the supporting leg (2) covering supporting segments (11). 2. Wagenheber nach Anspruch 1, dadurch ge­kennzeichnet, daß der Metallbügel (9) eine Blechlasche mit einer Ausnehmung (12) ist, mit der der Bügel (9) auf einem die Gewindespindel (5) umschließen­den abgesetzten Vorsprung (13) der Spindelmutter (6) angeordnet ist.2. Jack according to claim 1, characterized in that the metal bracket (9) is a sheet metal tab with a recess (12) with which the bracket (9) on a threaded spindle (5) enclosing the offset projection (13) of the spindle nut (6 ) is arranged. 3. Wagenheber nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Metallbügel (9) tragarmseitig an der Spindelmutter (6) angeordnet ist und gegen deren Achszapfen (7) vorspringende Abwinke­lungen (34) hat, an denen sich die Abstützsegmente (11) befinden.3. Jack according to claim 1 or 2, characterized in that the metal bracket (9) is arranged on the support arm side on the spindle nut (6) and against its journal (7) has protruding bends (34) on which the support segments (11) are located . 4. Wagenheber nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Metallbügel (9) im wesentlichen zwischen den U-Schen­keln (2′) eines U-förmigen Standbeins (2) angeordnet ist.4. Jack according to one or more of claims 1 to 3, characterized in that the metal bracket (9) is arranged substantially between the U-legs (2 ') of a U-shaped leg (2). 5. Wagenheber nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Abstutzsegmente (11) länger als standbeinblechstarke achszapfenparallele Lappen sind, und daß die Achszapfen (7) tragarmseitig gelegene, die Abstützsegmente (11) aufnehmende Außenumfangsausnehmungen (14) haben.5. Vehicle jack according to one or more of claims 1 to 4, characterized in that the support segments (11) are longer than the axles parallel to the main plate, and that the axle journals (7) have the outer segments (14) receiving the supporting segments (11) . 6. Wagenheber nach Anspruch 5, dadurch ge­kennzeichnet, daß die Achszapfen (7) an ihrem außerhalb der Außenumfangsausnehmungen (14) gelegenen Enden (10) radial vorspringende Rastrippen (16) aufweisen.6. Jack according to claim 5, characterized in that the axle journals (7) have radially projecting locking ribs (16) on their ends (10) located outside the outer peripheral recesses (14). 7. Wagenheber nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Metallbügel (9) an seinen Abstützsegmenten (11) dem Tragarm (4) zugewendete, den Abwinkelungen (34) des Me­tallbügels (9) parallele Haltelappen (15) aufweist.7. Jack according to one or more of claims 1 to 6, characterized in that the metal bracket (9) on its support segments (11) facing the support arm (4), the bends (34) of the metal bracket (9) parallel retaining tabs (15) having. 8. Wagenheber nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Metallbügel (9) ein Stanzteil ist.8. Jack according to one or more of claims 1 to 7, characterized in that the metal bracket (9) is a stamped part.
EP88118491A 1987-12-17 1988-11-05 Vehicle jack Expired - Lifetime EP0320613B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8716609U 1987-12-17
DE8716609U DE8716609U1 (en) 1987-12-17 1987-12-17 Car jack

Publications (2)

Publication Number Publication Date
EP0320613A1 true EP0320613A1 (en) 1989-06-21
EP0320613B1 EP0320613B1 (en) 1991-10-16

Family

ID=6815193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118491A Expired - Lifetime EP0320613B1 (en) 1987-12-17 1988-11-05 Vehicle jack

Country Status (3)

Country Link
EP (1) EP0320613B1 (en)
DE (2) DE8716609U1 (en)
ES (1) ES2026626T3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029615A1 (en) * 1997-12-04 1999-06-17 Batz, S. Coop. Ltda. Jack
DE19809441C2 (en) * 1997-10-14 2000-05-25 Metallifacture Ltd Jack
GB2345900A (en) * 1999-01-23 2000-07-26 Metallifacture Ltd Nut arrangement for vehicle jack
US6575432B1 (en) 1999-08-30 2003-06-10 Batz, S., Coop. Jack for vehicles

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2030552T3 (en) * 1988-05-05 1992-11-01 E.A. Storz Gmbh & Co. Kg ELEVACOCHES CAT.
DE3815247A1 (en) * 1988-05-05 1989-11-16 Storz E A Kg Jack
DE4114129C2 (en) * 1991-04-30 1993-11-11 Bilstein August Gmbh Co Kg Jack
ES2129311B1 (en) * 1996-01-22 2000-05-01 Batz S Coop Ltada VEHICLE JACK.
DE10053860B4 (en) * 2000-10-31 2010-10-28 Brano Wagenheber Gmbh Movement nut for a lifting device and lifting device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175532A1 (en) * 1972-03-13 1973-10-26 Rousseau Jean Jacques
FR2273752A1 (en) * 1974-06-07 1976-01-02 Bilstein August JACK FOR MOTOR VEHICLES
DE2914118A1 (en) * 1979-04-07 1980-10-23 Storz E A Kg Bearing for vehicle scissor jack - has load head and bearing body supported on curved ends of arm flanges
GB2070560A (en) * 1980-02-26 1981-09-09 Bilstein August Vehicle lifting jack
DE3510196A1 (en) * 1985-03-21 1986-09-25 E.A. Storz Gmbh & Co Kg, 7200 Tuttlingen Vehicle jack

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175532A1 (en) * 1972-03-13 1973-10-26 Rousseau Jean Jacques
FR2273752A1 (en) * 1974-06-07 1976-01-02 Bilstein August JACK FOR MOTOR VEHICLES
DE2914118A1 (en) * 1979-04-07 1980-10-23 Storz E A Kg Bearing for vehicle scissor jack - has load head and bearing body supported on curved ends of arm flanges
GB2070560A (en) * 1980-02-26 1981-09-09 Bilstein August Vehicle lifting jack
DE3510196A1 (en) * 1985-03-21 1986-09-25 E.A. Storz Gmbh & Co Kg, 7200 Tuttlingen Vehicle jack

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19809441C2 (en) * 1997-10-14 2000-05-25 Metallifacture Ltd Jack
WO1999029615A1 (en) * 1997-12-04 1999-06-17 Batz, S. Coop. Ltda. Jack
ES2139527A1 (en) * 1997-12-04 2000-02-01 Batz S Coop Ltda Jack
GB2345900A (en) * 1999-01-23 2000-07-26 Metallifacture Ltd Nut arrangement for vehicle jack
GB2345900B (en) * 1999-01-23 2002-12-11 Metallifacture Ltd Vehicle jack
US6575432B1 (en) 1999-08-30 2003-06-10 Batz, S., Coop. Jack for vehicles

Also Published As

Publication number Publication date
DE3865648D1 (en) 1991-11-21
ES2026626T3 (en) 1992-05-01
EP0320613B1 (en) 1991-10-16
DE8716609U1 (en) 1988-02-18

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