EP0734996A1 - Leicht montierbarer Wagenheber - Google Patents

Leicht montierbarer Wagenheber Download PDF

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Publication number
EP0734996A1
EP0734996A1 EP96400669A EP96400669A EP0734996A1 EP 0734996 A1 EP0734996 A1 EP 0734996A1 EP 96400669 A EP96400669 A EP 96400669A EP 96400669 A EP96400669 A EP 96400669A EP 0734996 A1 EP0734996 A1 EP 0734996A1
Authority
EP
European Patent Office
Prior art keywords
jack
nut
support leg
axis
head
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
EP96400669A
Other languages
English (en)
French (fr)
Other versions
EP0734996B1 (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
Priority date (The priority date 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 date listed.)
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 support leg and a lifting arm pivotally mounted on the support leg, to be moved by means of a control screw to lift the vehicle.
  • Cree of this type commonly known as "Cree Y” 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 rotates in a part forming a nut pivotally received in recesses in the support leg.
  • An object of the present invention is to provide a jack of the aforementioned type, of simplified mounting and executable by a robot.
  • the piece forming a nut is retained on the support leg by engagement of a retaining element, integral with the piece forming a nut, in at least one curvilinear opening formed on the support leg and centered on the articulation axis of the nut-forming part.
  • each recess in the support leg receiving the piece forming a nut constitutes a groove the bottom of which is delimited by a semi-circular edge and the opening width of which is greater than or equal to the diameter of said semi-circular edge.
  • the support leg has the general shape of a profile of U-shaped cross section, and said retaining element is a rivet passing through the piece forming a nut and axially bearing on the external faces 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 alignment with the control screw so that the latter is in axial support on the head of the jack at least during the operation of the jack when the latter is working empty and the screw control is actuated in the direction tending to fold the jack.
  • control screw has a stepped head resting axially against a thrust ball bearing at least during the operation of the jack when the latter is loaded.
  • this thrust ball bearing is housed in a yoke articulated on the lifting arm around the same axis of rotation as the jack head.
  • the jack head is articulated on the lifting arm around an axis of rotation perpendicularly cutting the longitudinal axis of the control screw.
  • the jack 1 shown in the figures comprises 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 be lifted.
  • a control screw 6, on which a drive handle 7 is articulated at one end, makes it possible to move the lifting arm 4 to raise or lower the head 5.
  • the lifting arm 4 is articulated on the supporting leg 2 around an axis of rotation X perpendicular to the plane of FIG. 1.
  • the head 5 of the jack 1 is articulated on the lifting arm 4 around a axis of rotation Y parallel to the axis X.
  • the control screw 6 extends along a longitudinal axis W parallel to the plane of FIG. 1, intersecting the axis X perpendicularly. It passes through a piece forming a nut 8 hinged on the supporting leg 2 around an axis of rotation Z intersecting the axis W and parallel to the axis X.
  • the jack 1 is symmetrical with respect to a plane of symmetry containing the axis W and perpendicular to the axis X.
  • the head 5 of the jack 1 is shown in isolation in Figures 3 to 5. It is preferably made of plastic, and comprises a body 50 crossed by a cylindrical bore 51 of revolution about 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 superiorly (when the jack is in the deployed lifting position of a vehicle as shown in FIG. 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 body of the vehicle, projecting downwards, or on any other part of the vehicle provided for this purpose.
  • the respective surfaces 540, 541 of the fingers 52, 53, facing each other, are plane and parallel.
  • the head 5 has stop surfaces 520, the role of which will be explained below, located at the base of the finger 52 and extending, planar, forming an angle of 44 ° 30 'with the plane of the surfaces 540 and 541.
  • the lower ends of these stop surfaces 520 have been referenced 521.
  • the body 50 also has a surface 55, cylindrical of revolution around the axis Y, 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 one axial end a shouldered head 61. It is provided at the opposite axial end with a tip 66 on which the handle 7 is articulated, about an axis of rotation perpendicularly cutting the axis W.
  • the shouldered head 61 rests by its axial end edge 63 against the surface 55 of the head with and by its shoulder, referenced 64, on a ball stop 62 bearing on a yoke 9.
  • This ball stop 62 comprises, in a manner known per se, two rings 62a, 62b of axis W, defining raceways 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. Holes 92 of axis Y are provided on the flanges 90 for the passage of the aforementioned articulation pin 98, 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 towards the interior of the flanges 90.
  • the latter are perforated at 94 as shown in FIG.
  • the lifting arm 4 is shown in isolation in FIGS. 9 to 14.
  • the latter is preferably produced by stamping, cutting and bending a sheet to form a metal section elongated in the direction of a longitudinal axis V perpendicular to the axes.
  • X and Y This profile has a cross section having the general shape of a U, as shown more particularly in Figures 11 to 13. It comprises two wings 40 joined by a back 41 extending generally perpendicular to the wings 40. Des oblong recesses 42 from stamping extend parallel to the axis V 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 inward, is made on the back 41 for the same purpose.
  • the wings 40 are pierced at a longitudinal end, at 44, for the passage of the aforementioned pin 98 and the rotational assembly of the head 5, the yoke 9 and the lifting arm 4.
  • These holes 44 are made at one end longitudinal of the recesses 42.
  • the wings 40 are pierced at the opposite longitudinal end, at 46, for the passage of a pin 28 of axis X serving for the articulation of the lifting arm 4 on the support leg 2.
  • These holes 46 are made on circular stampings 47 projecting towards the outside of the profile, as shown more particularly in FIG. 12.
  • the back 41 is extended, at 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 a cutting and a folding of the sheet metal used to produce the profile, as illustrated in FIG. 14.
  • the longitudinal ends of the wings 40 have at the end articulated on the support leg 2 a generally triangular profile, observed in the direction of the X axis. This profile is delimited by two orthogonal rectilinear edges 401, 402 joined by an edge in an arc of a circle 403 centered on the X axis.
  • the wall 48 s 'extends in the plane of the edges 401 and forms with the back 41 a corner dihedral at the top 238 °.
  • the nut forming part 8 is shown in isolation in FIGS. 15 to 19.
  • the latter is preferably made of plastic. It comprises a body 80 traversed along the axis W by a tapping 81 adapted to receive the threaded body 60 of the control screw 6. Lateral parts 82 form protrusions on either side of the body 80 for the articulation of the piece forming a nut 8 on the support leg 2. These lateral parts 82 are delimited radially, on the outside, by cylindrical surfaces of revolution around the axis Z, and axially by end sections 83 which are planar and perpendicular to the axis Z.
  • the piece forming a nut 8 also comprises two tabs 84 crossed by bores 85 of axis T parallel to the axis Z, for mounting means for retaining the piece forming a nut 8 on the leg of support 2, as will be explained below.
  • the lugs 84 are connected to the body 80 by providing annular grooves 86 centered on the Z axis with the cylindrical surfaces 82.
  • the dihedral from the top of the Z axis, delimited by the plane perpendicular to the W axis and by the plane containing the axis T, has an angle at the top 60 °.
  • FIG. 24 to 29 shows the support leg 2 in isolation.
  • the latter is preferably produced by stamping, cutting and bending a sheet to form an elongated section along a longitudinal axis G perpendicular to the axis Z.
  • 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 FIG. 29. More specifically, the foot 3 has a first planar wall 30 connected to the back 21 by a fold line 31 and forming, in the assembled position of the jack, an angle 43 ° with the back 21 as shown in Figure 24.
  • This wall 30 is extended downwards by a flat wall 32 intended to serve as a bearing surface on the ground.
  • the fold line extending at the junction of the walls 30 and 32 has been referenced 33.
  • the dihedral having the fold line 33 at the top and delimited by the planes of the walls 30 and 32 has an angle at the top of 142 °.
  • the wall 30 widens away from the back 21 until it reaches a width approximately twice that of the back 21 at the fold line 33.
  • the width of the wall 32 is constant. The latter rests, by its face opposite to that coming to bear on the ground, against the edge of the wings 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.
  • the cross section of the support leg 2 is generally constant from the foot 3 to about half the height of the support leg 2, where the width of the wings 20 increases and becomes maximum at the level of a bore. 24 serving for the passage of the pivot 28 of articulation of the lifting arm 4.
  • the width of the wings 20 then decreases up to the height of the upper longitudinal ends 26 of the recesses 22, where the wings 20 form notches 211.
  • the back 21 is interrupts at the height of these notches 211.
  • the width of the wings 20 increases above the notches 211 in the direction of the upper end of the support leg 2, situated opposite the foot 3, up to recesses 25 formed on the wings 20, serving as articulation bearings around the axis Z to the nut-forming part 8.
  • curvilinear lights 27 On the portion of the wings 20 extending between the upper ends 26 of the oblong recesses 22 and the plane containing the axis Z and perpendicular to the axis longitudinal G, are formed curvilinear lights 27. The latter participate in the retention of the part forming a nut in the recesses 25.
  • the back 21 forms, at the height of the holes 24, a dihedral projecting outwards, of angle at the top 152 °.
  • edges 23 extend rectilinearly, parallel to the recesses 22, from their lower end in abutment against the wall 32 to the plane containing the axis Z and perpendicular to the axis G.
  • the edges 23 extend beyond this plane, according to arcs of a circle 230 and end in rectilinear portions 231 perpendicular to the axis G.
  • the recesses 25 have, as shown in FIG. 24, edges in the shape of a semicircle 250, centered on the axis Z and of radius adapted to that of the cylindrical surfaces 82. These semicircular edges 250 are extended below by rectilinear edges 251 perpendicular to the longitudinal axis G, and above, by rectilinear edges 252 extending parallel to the edges 251 but over a distance corresponding to about a quarter of the length of the rectilinear edges 25l.
  • the edges 250, 251 and 252 are curved towards the interior space situated between the wings 20 to form bearing surfaces 253 coming into contact with the cylindrical surfaces 82 of the nut-forming part 8. These bearing surfaces 253 are of generatrix parallel to the Z axis.
  • the recesses 25 define grooves whose the bottom is formed by the semicircular edges 250 and whose opening width, 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 median line K in an arc of a circle situated at the same distance from the axis Z as the distance separating the latter and the axis T of the bores 85, and has at its longitudinal ends half edges -circulars 270 and 271.
  • the dihedral having the Z axis at its apex, delimited by the planes containing the axes of the semicircular edges 270 and 271, has an angle at the apex 115 °.
  • the plane containing the axis Z and the axis of the semi-circular holes 270 extends parallel to the straight edges 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 control screw 6 in the recesses 25, until the cylindrical surfaces 82 stop against the edges. semicircular 250.
  • the introduction of the nut forming part 8 can be carried out by a simple translational movement in a direction perpendicular to the axis Z and is suitable for mechanized execution.
  • 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 for retaining the piece forming the nut 8 on the support leg 2 After the riveting operation, the rivet 89 comes to bear axially at its axial ends on the external surface 200 of the wings 20 bordering the curvilinear openings 27.
  • the operation of the jack 1 is as follows.
  • the lifting arm 4 folds down between the wings 20 of the support leg 2, the head coming into abutment by the stop surfaces 520 on the curved edges 23.
  • the end edge 63 of the control screw 6 rests on the end of the cylindrical surface 55 adjacent to the finger 53, as shown more particularly in Figure 23.
  • the handle 7 can advantageously fold back against the external surface of a wing 20 as shown in FIG. 21.
  • the rivet 89 abuts against the semi-circular edges 271.
  • the user turns the handle 7 and rotates the control screw 6 around the axis W.
  • the longitudinal movement of the control screw 6 which results from its rotation in the internal thread 81 causes the lifting arm 4 to pivot clockwise in FIG. 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 curved slots 27 until the latter stops against the semi-circular edges 270.
  • the jack 1 is then in its maximum lifting position and the control screw is subjected to tensile forces when the jack is loaded.
  • the surfaces 540 and 541 are normally oriented vertically in the lifting position of the vehicle, as shown in FIG.
  • the user turns the control screw 6.
  • the control screw 6 works in traction and the ball bearing 62 is axially stressed in compression.
  • the control screw 6 axially abuts by the end edge 63 against the surface 55 of the head 5. This ensures the drive of the lifting arm 4 without using a stop sleeve engaged on the control screw as is the case with known cries.
  • a jack according to the invention has a space requirement in the folded position that is sufficiently small for its housing in a spare wheel rim, in particular thanks to the particular arrangement of the control screw 6 on the jack 1.
  • the assembly of the jack is easy to perform and can be executed by a robot.
  • the positioning of the axes of rotation X, Y and Z, in particular the intersection of the axes W and Y is advantageous from the kinematic point of view.
  • the rivet 89 increases the safety of use of the jack by preventing the wings of the support leg 2 from moving apart. 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)
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
FR9503832A FR2732325B1 (fr) 1995-03-31 1995-03-31 Cric de vehicule a assemblage simplifie
FR9503832 1995-03-31

Publications (2)

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

Family

ID=9477634

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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0785166A3 (de) * 1996-01-22 1999-04-07 Batz, S. Coop. Wagenheber
WO2002036477A1 (de) * 2000-10-31 2002-05-10 Thyssenkrupp Bilstein Gmbh Bewegungsmutter für eine hubvorrichtung sowie hubvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176458A (en) * 1985-05-10 1986-12-31 Metallifacture Ltd Vehicle jacks
EP0565801A1 (de) * 1992-04-14 1993-10-20 E.P.I., EUROPEENNE DE PARTICIPATIONS INDUSTRIELLE, Société Anonyme Wagenheber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176458A (en) * 1985-05-10 1986-12-31 Metallifacture Ltd Vehicle jacks
EP0565801A1 (de) * 1992-04-14 1993-10-20 E.P.I., EUROPEENNE DE PARTICIPATIONS INDUSTRIELLE, Société Anonyme Wagenheber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0785166A3 (de) * 1996-01-22 1999-04-07 Batz, S. Coop. Wagenheber
WO2002036477A1 (de) * 2000-10-31 2002-05-10 Thyssenkrupp Bilstein Gmbh Bewegungsmutter für eine hubvorrichtung sowie hubvorrichtung
CN100430310C (zh) * 2000-10-31 2008-11-05 泰森克鲁普比尔斯坦有限责任公司 用于一台举升装置的运动螺母以及举升装置

Also Published As

Publication number Publication date
EP0734996B1 (de) 2000-05-31
FR2732325A1 (fr) 1996-10-04
FR2732325B1 (fr) 1997-06-20
DE69608603D1 (de) 2000-07-06

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