EP0734996B1 - Leicht montierbarer Wagenheber - Google Patents

Leicht montierbarer Wagenheber Download PDF

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Publication number
EP0734996B1
EP0734996B1 EP19960400669 EP96400669A EP0734996B1 EP 0734996 B1 EP0734996 B1 EP 0734996B1 EP 19960400669 EP19960400669 EP 19960400669 EP 96400669 A EP96400669 A EP 96400669A EP 0734996 B1 EP0734996 B1 EP 0734996B1
Authority
EP
European Patent Office
Prior art keywords
jack
nut
axis
head
forming part
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.)
Expired - Lifetime
Application number
EP19960400669
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English (en)
French (fr)
Other versions
EP0734996A1 (de
Inventor
Gilles Ruffie
David Framboisier
Jean-Jacques Tate
Bernard Figueras
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.)
BOWDEN FRANCE SA
Original Assignee
BOWDEN FRANCE SA
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Filing date
Publication date
Application filed by BOWDEN FRANCE SA filed Critical BOWDEN FRANCE SA
Publication of EP0734996A1 publication Critical patent/EP0734996A1/de
Application granted granted Critical
Publication of EP0734996B1 publication Critical patent/EP0734996B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • 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 present invention relates to a vehicle jack comprising a supporting leg and a lifting arm pivotally mounted on the leg support, to be moved by means of a control screw to lift the vehicle.
  • Jacks of this type commonly known as "Y jacks", are described for example in patent applications EP-0 320 613, EP-0 565 801, GB-2 176 458 and FR-2 663 015.
  • the control screw turns in a part forming a nut pivotally received in support leg recesses.
  • An object of the present invention is to provide a jack of the type above, of simplified assembly and executable by a robot.
  • the nut-forming part is retained on the support leg by engagement of a retaining element, integral with the piece forming a nut, in at least one curvilinear lumen formed on the support leg and centered on the hinge axis of the nut-forming part.
  • each recess of the supporting leg receiving the piece forming a nut constitutes a groove the bottom of which is delimited by a semicircular edge with an opening width greater than or equal the diameter of said semicircular edge.
  • the support leg has the general shape of a U-shaped cross section, and said retaining element is a rivet passing through the nut-forming part and axially bearing on the faces external of the two wings of the profile.
  • the wall of the wings of said profile bordering said recesses is curved to increase the bearing surface in contact with the part forming a nut.
  • the jack comprises a jack head arranged in the alignment of the control screw so that it is in contact axially on the head of the jack at least during operation of the jack when the latter works empty and the control screw is actuated in the direction of folding the jack.
  • control screw has a stepped head resting axially against a thrust ball bearing at least during jack operation when the jack is loaded.
  • this thrust ball bearing is housed in a yoke articulated on the lifting arm around the same axis of rotation as the lifting head jack.
  • the jack head is articulated on the lifting arm about an axis of rotation perpendicularly cutting the longitudinal axis of the control screw.
  • the jack 1 shown in the figures has a support leg 2 intended to rest, by a lower end forming a foot 3, on the ground.
  • a lifting arm 4 is articulated at one end on this support leg 2, and supports at the other end a head 5 intended to come into contact with the vehicle to lift.
  • the lifting arm 4 is articulated on the supporting leg 2 around a axis of rotation X perpendicular to the plane of Figure 1.
  • the head 5 of the jack 1 is articulated on the lifting arm 4 around an axis of rotation Y parallel to the X axis.
  • the control screw 6 extends along a longitudinal axis W parallel to the plane of Figure 1, perpendicularly cutting the X axis. It crosses a piece forming a nut 8 hinged on the support leg 2 about an axis of rotation Z intersecting the W axis and parallel to the X axis.
  • the jack 1 is symmetrical by relation to a plane of symmetry containing the W axis and perpendicular to the X axis.
  • the head 5 of the jack 1 is shown in isolation in FIGS. 3 to 5. It is preferably made of plastic, and has a body 50 crossed by a cylindrical bore 51 of revolution around the Y axis, for the passage of a hinge pin 98 of the head 5 on the lifting arm 4.
  • Two fingers 52, 53 extend the body 50 above (when the jack is in the deployed position for lifting a vehicle as shown in the figure 1) and define between them a groove 54, opening upwards, for the engagement of the head 5 on a weld bead or a rebate of the vehicle body, protruding downward, or any other part of the vehicle provided for this purpose.
  • the respective surfaces 540, 541 of the fingers 52, 53, facing each other, are flat and parallel.
  • Head 5 has surfaces stop 520, the role of which will be explained below, located at the base of finger 52 and extending, flat, at an angle of 44 ° 30 'with the plane of the surfaces 540 and 541. The lower ends of these surfaces have been referenced 521 stop 520.
  • the body 50 also has a cylindrical surface 55 of revolution around the Y axis, extending over an angular sector of 60 °.
  • the control screw 6 has a helical thread 60 extending along the axis W, engaged in the part forming the nut 8, and comprises at a axial end a shouldered head 61. It is provided at the axial end opposite of a tip 66 on which the handle 7 is articulated, about an axis of rotation perpendicularly cutting the W axis.
  • the shouldered head 61 rests by its axial end edge 63 against the surface 55 of the head at and by its shoulder, referenced 64, on a ball bearing 62 bearing on a yoke 9.
  • This ball bearing 62 comprises, in a manner known per se, two rings 62a, 62b of axis W, defining paths of bearing for balls 62c interposed between the rings 62a, 62b.
  • the yoke 9 is shown in isolation in Figures 6 to 8. It has two flanges 90, planes and parallel to each other, joined by a base 91. The latter extends perpendicular to the plane of the flanges 90. Des holes 92 of Y axis are provided on the flanges 90 for the passage of the articulation pin 98 above, and the rotational mounting of the yoke 9 on the lifting arm 4 around the axis Y.
  • the base 91 is crossed by a bore 93 for the passage of the control screw 6.
  • the ring 62b of the ball bearing 62 rests against the face 910 of the base 91 facing the interior space at flanges 90. These are perforated at 94 as shown in FIG. 8 to save material.
  • edges 95 are present, observed in the direction of the Y axis, a generally triangular contour, delimited laterally by two straight edges 95 converging towards the Y axis, these edges 95 being joined at their end opposite the base 91 by an edge 96 in arc of a circle, centered on the Y axis, and connecting to base 91 by edges rectilinear 97, parallel to the W axis.
  • FIGS. 9 to 14 show the lifting arm 4 in isolation.
  • the latter is preferably produced by stamping, cutting and folding of a sheet to form an elongated metal profile in the direction of a longitudinal axis V perpendicular to the X and Y axes.
  • This profile has a cross section having the general shape of a U, as shown more particularly in Figures 11 to 13. It has two wings 40 joined by a back 41 extending generally perpendicular to the wings 40.
  • oblong recesses 42 from stamping extend parallel to the V axis on the wings 40 to stiffen the profile. These recesses 42 protrude into the interior space of the profile located between the wings 40.
  • An oblong recess 43, projecting inwards, is produced on back 41 for the same purpose.
  • the wings 40 are pierced at one end longitudinal, at 44, for the passage of the aforementioned pin 98 and the assembly in rotation of the head 5, of the yoke 9 and of the lifting arm 4. These holes 44 are made at a longitudinal end of the recesses 42.
  • the wings 40 are drilled at the opposite longitudinal end, at 46, for the passage a pin 28 of axis X used for the articulation of the lifting arm 4 on the support leg 2.
  • These holes 46 are made on circular stampings 47 projecting outwards from the profile, as shown more particularly in FIG. 12. These circular stampings 47 are located in the extension of the recesses 42, leaving an interval 470 with these as shown in Figure 9.
  • the back 41 is extended, the end of the lifting arm 4 articulated on the support leg 2, by a wall 48 extending obliquely between the wings 40 and forming a spacer.
  • the wall 48 results from cutting and bending the sheet metal used to make the profile, as shown in Figure 14.
  • the longitudinal ends of the wings 40 have at the end articulated on the support leg 2 a profile generally triangular, observed in the direction of the X axis. This profile is delimited by two rectilinear orthogonal edges 401, 402 joined by an edge in an arc 403 centered on the axis X.
  • the wall 48 extends in the plane of the edges 401 and forms with the back 41 a dihedral of angle at the top 238 °.
  • FIGS. 15 to 19 show separately the part forming nut 8.
  • the latter is preferably made of plastic.
  • She comprises a body 80 crossed along the axis W by a thread 81 adapted to receive the threaded body 60 of the control screw 6.
  • Lateral parts 82 protrude on either side of the body 80 for the articulation of the part forming nut 8 on the supporting leg 2.
  • These lateral parts 82 are delimited radially, on the outside, by cylindrical surfaces of revolution around from the Z axis, and axially by planar end sections 83 and perpendicular to the Z axis.
  • the nut forming part 8 also comprises two tabs 84 crossed by holes 85 of axis T parallel to the axis Z, for mounting of means for retaining the piece forming a nut 8 on the leg support 2, as will be explained below.
  • the legs 84 are connected to the body 80 with the grooves 82 of the grooves annulars 86 centered on the Z axis.
  • the apex dihedral Z axis, delimited by the plane perpendicular to the W axis and by the plane containing the T axis, is at an angle summit 60 °.
  • FIGS. 24 to 29 show the support leg 2 in isolation.
  • the latter is preferably carried out by stamping, cutting and folding of a sheet to form an elongated profile along a longitudinal axis G perpendicular to the Z axis.
  • This profile has a cross section having the general shape of a U, comprising two wings 20 joined by a back 21.
  • Each wing 20 has an oblong recess 22 coming from stamping, projecting into the interior space of the profile located between the wings 20, and intended to stiffen the profile.
  • the foot 3 is formed by cutting and folding as illustrated in the Figure 29. More specifically, the foot 3 has a first planar wall 30 connecting to the back 21 by a fold line 31 and forming, in position jack assembly, an angle of 43 ° with the back 21 as shown in the Figure 24.
  • This wall 30 is extended downwards by a flat wall 32 intended to serve as a bearing surface on the ground.
  • We have referenced 33 the line of folding extending to the junction of the walls 30 and 32.
  • the dihedral having for vertex the fold line 33 and delimited by the planes of the walls 30 and 32 has a angle at the summit of 142 °.
  • the wall 30 widens away from the back 21 until reaching a width approximately double that of the back 21 at the level of the fold line 33.
  • the width of the wall 32 is constant. This last rests, by its face opposite to that coming to bear on the ground, against the wing edge 20.
  • the free edges 23 of the wings 20 are curved outwards as shown more particularly on the cross sections of Figures 27 and 28, for the purpose of stiffening the profile.
  • Cross section of the supporting leg 2 is generally constant from the foot 3 to the about half the height of the supporting leg 2, where the width of the wings 20 increases and becomes maximum up to a hole 24 used for passage of the pivot 28 of the articulation of the lifting arm 4.
  • the width of the wings 20 then decreases to the height of the upper longitudinal ends 26 recesses 22, where the wings 20 form notches 211.
  • the back 21 stops at the height of these notches 211.
  • the width of the wings 20 increases above the notches 211 towards the upper end of the leg support 2, located opposite foot 3, to recesses 25 formed on the wings 20, serving as articulation bearings around the axis Z to the part forming a nut 8.
  • the back 21 forms, at the height of the holes 24, a dihedral projecting outwards, from angle to summit 152 °.
  • edges 23 extend straight, parallel to the recesses 22, from their lower end resting against the wall 32 up to the plane containing the Z axis and perpendicular to the G axis.
  • the edges 23 extend beyond this plane, in arcs of circle 230 and end in rectilinear portions 231 perpendicular to the G axis.
  • the recesses 25 have, as shown in FIG. 24, edges in the shape of a semicircle 250, centered on the Z axis and of radius adapted to that of the cylindrical surfaces 82. These semicircular edges 250 are extended below by straight edges 251 perpendicular to the longitudinal axis G, and above, by rectilinear edges 252 extending parallel to the edges 251 but over a corresponding distance about a quarter of the length of the straight edges 25l. Edges 250, 251 and 252 are bent towards the interior space located between the wings 20 to form bearing surfaces 253 coming into contact with the surfaces cylindrical 82 of the nut-forming part 8. These bearing surfaces 253 are of generator parallel to the Z axis.
  • the recesses 25 define grooves whose the bottom is constituted by the semicircular edges 250 and whose width opening, that is to say the distance separating the straight edges 251 and 252, is at least equal to the diameter of the semicircular edges 250.
  • Each curvilinear lumen 27 extends along a midline K in an arc located at the same distance from the Z axis as the distance between the latter and the axis T of the holes 85, and has at its ends longitudinal of the semicircular edges 270 and 271.
  • the dihedral having for vertex the Z axis, delimited by the planes containing the axes of the semicircular edges 270 and 271, is at an angle at the top 115 °.
  • the plane containing the Z axis and the axis of the semi-circular holes 270 extends parallel to the edges straight 251.
  • the mounting of the nut-forming part 8 on the support leg 2 is easily carried out by engaging the nut forming part 8 provided with the screw control 6 in the recesses 25, up to the stop of the cylindrical surfaces 82 against the semicircular edges 250.
  • the introduction of the part forming nut 8 can be made by a simple translational movement in a direction perpendicular to the Z axis and suitable for execution mechanized.
  • the holes 85 of the tabs 84 of the piece forming the nut 8 are then positioned opposite the curved lights 27.
  • a rivet 89 is introduced into the curved lights 27 and the holes 85 to retain the nut forming part 8 on the supporting leg 2. After the riveting operation, the rivet 89 comes to bear axially at its axial ends on the surface external 200 of the wings 20 bordering the curvilinear lights 27.
  • jack 1 The operation of jack 1 is as follows.
  • the user turns the handle 7 and drives in rotation the control screw 6 around the axis W.
  • the displacement longitudinal of the control screw 6 which results from its rotation in the internal thread 81 causes the lifting arm 4 to pivot in the direction time in Figure 1 and the upward movement of the head 5.
  • the rotation of the lifting arm 4 is accompanied by a displacement of the rivet 89 in the curvilinear lights 27 until the latter stops against the semi-circular edges 270.
  • Jack 1 is then in its maximum lifting position and the control screw is subjected to tensile forces when the jack is in charge.
  • the surfaces 540 and 541 are normally oriented vertically in the vehicle lifting position, as shown in Figure 1, and the front surface 63 of the ball stop 62 is then located at the end of the cylindrical surface 55 furthest from the fingers 52 and 53. Any rotation additional head to counterclockwise is prevented by stopper lower ends 521 of stop surfaces 520 against edges end 201 of the wings 20, as illustrated in FIG. 22 more particularly.
  • control screw 6 To fold the jack 1, the user turns the control screw 6. As long as jack 1 lifts the vehicle, i.e. works under load, the screw control 6 works in tension and the thrust ball 62 is stressed axially in compression. When the jack has been folded enough and does not no longer lifts the vehicle, i.e. works when empty, control screw 6 axially abuts by the end edge 63 against the surface 55 of the head 5. This ensures the training of the lifting arm 4 without using stop sleeve engaged on the control screw as is the case on known jacks.
  • a jack according to the invention has a space requirement in the folded position sufficiently weak for its accommodation in a rim of spare wheel, in particular thanks to the special arrangement of the bolt control 6 on the jack 1.
  • the jack is assembled easily and can be executed by a robot.
  • the positioning of the axes of rotation X, Y and Z, in particular the intersection of the W and Y axes is advantageous from the point of kinematic view.
  • Rivet 89 increases the safety of using the jack preventing the wings of the supporting leg 2 from spreading.
  • a stop sleeve is not necessary and the free rotation of the head to on the lifting arm 4 reduces the risk of damage to the vehicle body in the event of improper positioning of the jack.

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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)

Claims (9)

  1. Wagenheber (1) umfassend ein Stützbein (2) und einen Hebearm (4), der drehbar an jenem montiert ist und mit Hilfe einer Betätigungsschraube (6) bewegbar ist, die sich in einem eine Mutter bildenden Teil (8), welches schwenkbar in Aussparungen (25) des Stützbeins (2) gelagert ist, dreht, wobei das die Mutter bildende Teil (8) durch ein Halteelement (89) gehalten wird, welches mit dem die Mutter bildenden Teil (8) einstückig ist, dadurch gekennzeichnet, daß das Halteelement am Stützbein in mindestens eine gekrümmte Öffnung (27) eingreift, die an dem Stützbein (2) ausgespart ist, und zu der Schwenkachse (Z) des die Mutter bildenden Teils (8) am Stützbein (2) zentriert ist.
  2. Heber gemäß Anspruch 1, dadurch gekennzeichnet, daß jede Aussparung (25) des Stützbeins (2), in welcher das die Mutter bildende Teil (8) gelagert ist, eine Vertiefung ausbildet, deren Boden von einem halbkreisförmigen Rand (250) begrenzt wird, und deren Öffnungsgröße größer oder gleich dem Durchmesser des halbkreisförmigen Rands ist.
  3. Heber gemäß einem der Ansprüche 1 und 2, wobei das Stützbein (2) im wesentlichen die Form eines Profils mit U-förmigem Querschnitt hat, dadurch gekennzeichnet, daß das Halteelement ein Niet (89) ist, der sich axial an den Außenseiten der zwei Flügel (20) des Profils abstützt.
  4. Heber gemäß einem der Ansprüche 1 bis 3, wobei das Stützbein (2) im wesentlichen die Form eines Profils mit U-förmigem Querschnitt hat, dadurch gekennzeichnet, daß die Wand der Flügel des Profils, die die Aussparungen (25) begrenzt, gekrümmt ist, um die Stützfläche, die das die Mutter bildende Teil (8) berührt, zu vergrößern.
  5. Heber gemäß einem der Ansprüche 1 bis 4, wobei der Heber einen Hebekopf zum Berühren des Wagens aufweist, dadurch gekennzeichnet, daß der Hebekopf in Ausrichtung mit der Betätigungsschraube angeordnet ist, so daß diese sich zumindest dann beim Betrieb des Hebers axial am Hebekopf abstützt, wenn dieser entlastet arbeitet und die Betätigungsschraube in die Richtung zum Zusammenklappen des Hebers angetrieben wird.
  6. Heber gemäß Anspruch 5, dadurch gekennzeichnet, daß dieser einen Hebekopf (5) aufweist, der am Hebearm (4) um eine Rotationsachse (Y) geschwenkt wird, die senkrecht die Längsachse (W) der Betätigungsschraube (6) schneidet.
  7. Heber gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Betätigungsschraube (6) einen Kopf mit einem Ansatz (61) aufweist, der sich zumindest dann beim Betrieb des Hebers, wenn der Heber belastet ist, gegen ein Kugellager (62) abstützt.
  8. Heber gemäß Anspruch 7, dadurch gekennzeichnet, daß das Kugellager (62) in einer Kappe (9) angeordnet ist, die am Hebearm (4) schwenkbar ist.
  9. Heber gemäß Anspruch 8, dadurch gekennzeichnet, daß die Kappe (9) um die selbe Rotationsachse (Y) drehbar montiert ist, wie der Hebekopf (5).
EP19960400669 1995-03-31 1996-03-28 Leicht montierbarer Wagenheber Expired - Lifetime EP0734996B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9503832 1995-03-31
FR9503832A FR2732325B1 (fr) 1995-03-31 1995-03-31 Cric de vehicule a assemblage simplifie

Publications (2)

Publication Number Publication Date
EP0734996A1 EP0734996A1 (de) 1996-10-02
EP0734996B1 true EP0734996B1 (de) 2000-05-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960400669 Expired - Lifetime EP0734996B1 (de) 1995-03-31 1996-03-28 Leicht montierbarer Wagenheber

Country Status (3)

Country Link
EP (1) EP0734996B1 (de)
DE (1) DE69608603D1 (de)
FR (1) FR2732325B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2129311B1 (es) * 1996-01-22 2000-05-01 Batz S Coop Ltada Gato para vehiculos.
DE10053860B4 (de) * 2000-10-31 2010-10-28 Brano Wagenheber Gmbh Bewegungsmutter für eine Hubvorrichtung sowie Hubvorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176458B (en) * 1985-05-10 1989-07-05 Metallifacture Ltd Vehicle jack
EP0565801B2 (de) * 1992-04-14 2000-08-30 E.P.I., EUROPEENNE DE PARTICIPATIONS INDUSTRIELLE, Société Anonyme Wagenheber

Also Published As

Publication number Publication date
EP0734996A1 (de) 1996-10-02
DE69608603D1 (de) 2000-07-06
FR2732325A1 (fr) 1996-10-04
FR2732325B1 (fr) 1997-06-20

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