EP0773184A1 - Jack with an assembly of the barrel for the screw-threaded member of the jack - Google Patents

Jack with an assembly of the barrel for the screw-threaded member of the jack Download PDF

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Publication number
EP0773184A1
EP0773184A1 EP96402400A EP96402400A EP0773184A1 EP 0773184 A1 EP0773184 A1 EP 0773184A1 EP 96402400 A EP96402400 A EP 96402400A EP 96402400 A EP96402400 A EP 96402400A EP 0773184 A1 EP0773184 A1 EP 0773184A1
Authority
EP
European Patent Office
Prior art keywords
jack
pin
projection
journal
recess
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
EP96402400A
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German (de)
French (fr)
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EP0773184B1 (en
Inventor
Gilles Ruffie
David Framboisier
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.)
Adwest Bowden France SA
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Adwest Bowden France SA
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Filing date
Publication date
Application filed by Adwest Bowden France SA filed Critical Adwest Bowden France SA
Publication of EP0773184A1 publication Critical patent/EP0773184A1/en
Application granted granted Critical
Publication of EP0773184B1 publication Critical patent/EP0773184B1/en
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 invention relates to jacks comprising a rotary actuating rod pivotally mounted on two facing walls of a piece of the jack (or two facing walls belonging respectively to one and to the other of two pieces jack) by means of a pin whose pivot axis is perpendicular to the axis of rotation of the rod, the two ends of the pin being pivotally mounted in one and in the other of two recesses in opposite practiced respectively in one and the other of these two walls.
  • the problem is to easily place each end of the pin in the corresponding recess and then prevent this end from coming out of the recess.
  • the publications DE-A- 30 37 934, DE-A- 27 56 108 and DE-A 41 30 108 describe embodiments in which the positioning of the trunnion is facilitated by a lateral cutting of the recess.
  • the publication EP-A 0 327 484 describes a solution in which this lateral cutting is avoided which weakens the mounting but requires a reduction in the section of the ends of the journal thereby reducing the mechanical strength, in order to allow mounting in the recess , also made more complicated.
  • the subject of the present invention is a solution which facilitates mounting while retaining appropriate mounting strength during mounting.
  • each recess is delimited by a side wall, the lower part of which is capable of constituting a cradle for the pin and the upper part of which opens out and allows lower the end of the trunnion into its cradle, and is delimited by a bottom face, in that the edge of the end of the trunnion has a projection, and in that said bottom face has local digging capable of receiving said and to allow it to rotate with the journal when the latter rests in said cradle, in that said bottom face has a groove which communicates said excavation with the outside and which is designed so that said projection can slide in the groove until it is fully received in said digging during the positioning of the pin in said cradle, said projection being chosen so that the angular position of the pin to allow introduction of said projection in the groove is outside the range of angular positions that the journal can take in service.
  • the pin comprises in a manner known per se a central part traversed by a threaded bore in which the rod 3 meshes and two cylindrical ends.
  • the journal On the edge of each end the journal has a projection 8 (8 ') constituted in this example by a circular sector determined by a curve which extends the cylindrical surface of the journal and by a cord smaller than the diameter of this cylinder.
  • the facing faces (1a, 1'a) of the walls (1,1 ') have opposite recesses (4,4') U-shaped, to receive the respective cylindrical ends (2a, 2a ') of the pin (2 ).
  • the recess 4 of the wall 1 opens laterally on a free edge (1b) of this wall and is delimited laterally by a wall (9) whose lower part is shaped semi-circular to hold the end of the pin and allow it to turn on itself.
  • the recess is delimited in the thickness of the wall by a bottom face (5) which has a first local excavation (6), capable of receiving the projection of the journal and allowing it to rotate with the journal when the latter rests on the wall 9, and a second local excavation (7) constituting a groove which makes the first excavation communicate with said free edge (1a) and in which said projection can slide until it is fully received in the first digging.
  • the position of the projection (8,8 ') is chosen so that the angular position of the pin which allows the projection (8) to be introduced into the groove (7) is outside the range of angular positions that the pin can take into service.
  • the invention is particularly applicable to jacks used to lift an automobile.

Abstract

The rotary support consists of a cylinder (2) fitted into holes (6) in two side plates and able to rotate as the jacking arm is moved up and down. The cylinder has a projection (8,8') on each of its end faces which is able to pass through a slot (7) in each side plate (1) of the jack to engage with the hole. Once the cylinder has been inserted into the side plate holes it is rotated to set it in the required position for the jacking arm. In this position, the cylinder is unable to escape from the holes.

Description

L'invention concerne les crics comportant une tige de manoeuvre rotative montée à pivotement sur deux parois en vis à vis d'une pièce du cric (ou deux parois en vis à vis appartenant respectivement à l'une et à l'autre de deux pièces du cric) au moyen d'un tourillon dont l'axe de pivotement est perpendiculaire à l'axe de rotation de la tige, les deux extrémités du tourillon étant montées à pivotement respectivement dans l'un et dans l'autre de deux évidements en vis à vis pratiqués respectivement dans l'une et l'autre de ces deux parois.The invention relates to jacks comprising a rotary actuating rod pivotally mounted on two facing walls of a piece of the jack (or two facing walls belonging respectively to one and to the other of two pieces jack) by means of a pin whose pivot axis is perpendicular to the axis of rotation of the rod, the two ends of the pin being pivotally mounted in one and in the other of two recesses in opposite practiced respectively in one and the other of these two walls.

Le problème se pose de mettre en place facilement chaque extrémité du tourillon dans l'évidement correspondant et d'empêcher ensuite que cette extrémité ressorte de l'évidement.The problem is to easily place each end of the pin in the corresponding recess and then prevent this end from coming out of the recess.

Les publications DE-A- 30 37 934, DE-A- 27 56 108 et DE-A 41 30 108 décrivent des réalisations dans lesquelles la mise en place du tourillon est facilitée par un découpage latéral de l'évidement. La publication EP-A 0 327 484 décrit une solution dans laquelle on évite ce découpage latéral qui fragilise le montage mais nécessite une réduction de la section des extrémités du tourillon diminuant de ce fait la résistance mécanique, afin de permettre le montage dans l'évidement, également rendu plus compliqué.The publications DE-A- 30 37 934, DE-A- 27 56 108 and DE-A 41 30 108 describe embodiments in which the positioning of the trunnion is facilitated by a lateral cutting of the recess. The publication EP-A 0 327 484 describes a solution in which this lateral cutting is avoided which weakens the mounting but requires a reduction in the section of the ends of the journal thereby reducing the mechanical strength, in order to allow mounting in the recess , also made more complicated.

La présente invention a pour objet une solution facilitant le montage tout en conservant au montage une solidité appropriée.The subject of the present invention is a solution which facilitates mounting while retaining appropriate mounting strength during mounting.

On y parvient, selon l'invention, avec un montage caractérisé en ce que chaque évidement est délimité par une paroi latérale dont la partie inférieure est apte à constituer un berceau pour le tourillon et dont la partie supérieure débouche à l'extérieur et permet de descendre l'extrémité du tourillon dans son berceau, et est délimité par une face de fond, en ce que la tranche de l'extrémité du tourillon comporte une saillie, et en ce que ladite face de fond présente un creusement local apte à recevoir ladite saillie et à lui permettre de tourner avec le tourillon lorsque celui-ci repose dans ledit berceau, en ce que ladite face de fond présente une gorge qui fait communiquer ledit creusement avec l'extérieur et qui est conçue pour que ladite saillie puisse coulisser dans la gorge jusqu'à être reçue intégralement dans ledit creusement pendant la mise en place du tourillon dans ledit berceau, ladite saillie étant choisie en sorte que la position angulaire du tourillon pour permettre l'introduction de ladite saillie dans la gorge soit en dehors de la plage des positions angulaires que le tourillon puisse prendre en service.This is achieved, according to the invention, with an arrangement characterized in that each recess is delimited by a side wall, the lower part of which is capable of constituting a cradle for the pin and the upper part of which opens out and allows lower the end of the trunnion into its cradle, and is delimited by a bottom face, in that the edge of the end of the trunnion has a projection, and in that said bottom face has local digging capable of receiving said and to allow it to rotate with the journal when the latter rests in said cradle, in that said bottom face has a groove which communicates said excavation with the outside and which is designed so that said projection can slide in the groove until it is fully received in said digging during the positioning of the pin in said cradle, said projection being chosen so that the angular position of the pin to allow introduction of said projection in the groove is outside the range of angular positions that the journal can take in service.

On décrira ci-après une réalisation d'un montage de tourillon conforme à l'invention, cette réalisation n'étant décrite et représentée qu'à titre d'exemple, en référence aux figures du dessin joint sur lequel :

  • - la fig. 1 est une vue en plan de deux parois en vis-à-vis d'un cric sur lesquelles est monté le tourillon de la tige filetée de manoeuvre du cric ;
  • - la fig. 2 est une coupe du montage par un plan passant par l'axe de pivotement du tourillon et l'axe de rotation de la tige filetée, et
  • - les figs. 3A, 3B, 3C et 3D sont des vues en perspective d'étapes successives du montage d'une extrémité du tourillon dans l'évidement correspondant.
An embodiment of a trunnion assembly in accordance with the invention will be described below, this embodiment being described and shown only by way of example, with reference to the figures in the attached drawing in which:
  • - fig. 1 is a plan view of two walls facing a jack on which is mounted the pin of the threaded rod for operating the jack;
  • - fig. 2 is a section of the assembly through a plane passing through the pivot axis of the journal and the axis of rotation of the threaded rod, and
  • - figs. 3A, 3B, 3C and 3D are perspective views of successive stages in the mounting of one end of the trunnion in the corresponding recess.

On voit sur la fig. 1 deux parois opposées (1,1') d'une pièce du cric, par exemple les deux ailes opposées d'une jambe ayant en section droite la forme d'un U (ou deux parois en vis à vis appartenant à deux pièces différentes du cric) sur lesquelles doit être monté le tourillon 2 qui permet à la tige de manoeuvre 3 du cric de pivoter autour d'un axe perpendiculaire à l'axe de rotation de la tige.We see in fig. 1 two opposite walls (1,1 ') of a piece of the jack, for example the two opposite wings of a leg having in cross section the shape of a U (or two opposite walls belonging to two different pieces jack) on which must be mounted the pin 2 which allows the actuating rod 3 of the jack to pivot about an axis perpendicular to the axis of rotation of the rod.

Le tourillon comporte de façon en soi connue une partie centrale traversée par un alésage fileté dans lequel engrène la tige 3 et deux extrémités cylindriques. Sur la tranche de chaque extrémité le tourillon comporte une saillie 8 (8') constituée dans cet exemple par un secteur circulaire déterminé par une courbe qui prolonge la surface cylindrique du tourillon et par une corde inférieure au diamètre de ce cylindre.The pin comprises in a manner known per se a central part traversed by a threaded bore in which the rod 3 meshes and two cylindrical ends. On the edge of each end the journal has a projection 8 (8 ') constituted in this example by a circular sector determined by a curve which extends the cylindrical surface of the journal and by a cord smaller than the diameter of this cylinder.

Les faces en regard (1a, 1'a) des parois (1,1') présentent des évidements opposés (4,4') en forme de U, pour recevoir les extrémités respectives cylindriques (2a, 2a') du tourillon (2).The facing faces (1a, 1'a) of the walls (1,1 ') have opposite recesses (4,4') U-shaped, to receive the respective cylindrical ends (2a, 2a ') of the pin (2 ).

Comme on le voit le mieux sur les figures 3A à 3D, l'évidement 4 de la paroi 1 débouche latéralement sur un bord libre (1b) de cette paroi et est délimité latéralement par une paroi (9) dont la partie inférieure est de forme semi-circulaire pour maintenir l'extrémité du tourillon et lui permettre de tourner sur elle-même. L'évidement est délimité dans l'épaisseur de la paroi par une face de fond (5) qui présente un premier creusement local (6), apte à recevoir la saillie du tourillon et à lui permettre de tourner avec le tourillon lorsque ce dernier repose sur la paroi 9, et un deuxième creusement local (7) constituant une gorge qui fait communiquer le premier creusement avec ledit bord libre (1a) et dans laquelle ladite saille peut coulisser jusqu'à être reçue intégralement dans le premier creusement.As best seen in Figures 3A to 3D, the recess 4 of the wall 1 opens laterally on a free edge (1b) of this wall and is delimited laterally by a wall (9) whose lower part is shaped semi-circular to hold the end of the pin and allow it to turn on itself. The recess is delimited in the thickness of the wall by a bottom face (5) which has a first local excavation (6), capable of receiving the projection of the journal and allowing it to rotate with the journal when the latter rests on the wall 9, and a second local excavation (7) constituting a groove which makes the first excavation communicate with said free edge (1a) and in which said projection can slide until it is fully received in the first digging.

La position de la saillie (8,8') est choisie de façon que la position angulaire du tourillon qui permet d'introduire la saillie (8) dans la gorge (7) soit en dehors de la plage des positions angulaires que le tourillon puisse prendre en service.The position of the projection (8,8 ') is chosen so that the angular position of the pin which allows the projection (8) to be introduced into the groove (7) is outside the range of angular positions that the pin can take into service.

Des dispositions analogues sont prévues sur l'évidement opposé (4') et sur l'autre extrémité (2a') du tourillon 2.Similar arrangements are provided on the opposite recess (4 ') and on the other end (2a') of the pin 2.

Pour mettre en place le tourillon, on le présente (fig. 3A) aux parois (1,1') en sorte que les saillies (8,8') du tourillon puisse glisser dans les gorges respectives (7,7') jusqu'à ce que les extrémités du tourillon repose dans les creusements (6,6') (fig. 3B). Un pivotement du tourillon amène alors ce dernier dans une position où les saillies (8,8') ne peuvent plus remonter dans les gorges (7,7') comme on le voit sur les figures 3C et 3D qui montre les positions angulaires du tourillon correspondant aux fins de course de pivotement de la tige filetée de commande du cric.To set up the pin, it is presented (fig. 3A) on the walls (1,1 ') so that the projections (8,8') of the pin can slide in the respective grooves (7,7 ') until that the ends of the trunnion rest in the hollows (6,6 ') (fig. 3B). A pivoting of the pin then brings the latter into a position where the projections (8,8 ') can no longer go back into the grooves (7,7') as seen in Figures 3C and 3D which shows the angular positions of the pin corresponding to the pivoting limit switches of the threaded jack control rod.

L'invention s'applique notamment aux crics utilisés pour soulever une automobile.The invention is particularly applicable to jacks used to lift an automobile.

Claims (3)

Cric comportant une tige de manoeuvre rotative (4) montée à pivotement sur deux parois en vis à vis (1b, 1c) d'une pièce du cric (ou deux parois en vis à vis appartenant respectivement à l'une et à l'autre de deux pièces du cric) au moyen d'un tourillon (2) dont l'axe de pivotement est perpendiculaire à l'axe de rotation de la tige, les deux extrémités (5b ; 5c) du tourillon étant montées à pivotement respectivement dans l'un et dans l'autre de deux évidements en vis à vis (4, 4') pratiqués respectivement dans l'une et l'autre de ces deux parois, caractérisé en ce que chaque évidement est délimité par une paroi latérale (9) dont la partie inférieure est apte à constituer un berceau pour le tourillon et dont la partie supérieure permet de descendre le tourillon dans son berceau et débouche à l'extérieur, et est délimité par une face de fond (5), en ce que la tranche de l'extrémité du tourillon comporte une saillie (8, 8') et en ce que ladite face de fond (5) présente un creusement local (6) apte à recevoir ladite saillie du tourillon et la maintenir tout en lui permettant de tourner avec le tourillon, et présente également une gorge (7) qui fait communiquer ledit creusement (6) avec l'extérieur et qui est conçue pour que ladite saillie puisse coulisser dans la gorge jusqu'à être reçue intégralement dans ledit creusement pendant l'introduction du tourillon dans son berceau, ladite saillie étant choisie en sorte que la position angulaire du tourillon pour permettre l'introduction de la saillie dans ladite gorge soit en dehors de la plage des positions angulaires que le tourillon puisse prendre en service.Jack comprising a rotary operating rod (4) pivotally mounted on two facing walls (1b, 1c) in one piece of the jack (or two facing walls belonging respectively to one and to the other) two parts of the jack) by means of a pin (2) whose pivot axis is perpendicular to the axis of rotation of the rod, the two ends (5b; 5c) of the pin being pivoted respectively in the 'one and the other of two opposite recesses (4, 4') made respectively in one and the other of these two walls, characterized in that each recess is delimited by a side wall (9) the lower part of which is capable of constituting a cradle for the trunnion and the upper part of which allows the trunnion to descend into its cradle and opens out, and is delimited by a bottom face (5), in that the edge of the end of the journal has a projection (8, 8 ') and in that said bottom face (5) has a local recess (6) capable of receiving said protrusion from the journal and maintaining it while allowing it to rotate with the journal, and also has a groove (7) which communicates said recess (6) with the outside and which is designed so that said projection can slide in the groove until it is fully received in said digging during the introduction of the pin into its cradle, said projection being chosen so that the angular position of the pin to allow the introduction of the projection in said groove is outside the range of angular positions that the journal can take in service. Cric selon la revendication 1, caractérisé en ce que ladite paroi latérale (9) de l'évidement est en forme de U.Jack according to claim 1, characterized in that said side wall (9) of the recess is U-shaped. Cric selon la revendication 1 ou 2, caractérisé en ce que ladite saillie a la forme d'un secteur circulaire dont la courbe prolonge la surface cylindrique du tourillon et dont la corde est inférieure au diamètre de ce cylindre.Jack according to claim 1 or 2, characterized in that said projection has the shape of a circular sector whose curve extends the cylindrical surface of the pin and whose cord is less than the diameter of this cylinder.
EP19960402400 1995-11-13 1996-11-12 Jack with an assembly of the barrel for the screw-threaded member of the jack Expired - Lifetime EP0773184B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9513392A FR2741059B1 (en) 1995-11-13 1995-11-13 JACK COMPRISING AN IMPROVED BEARING MOUNTING FOR THE JACK OF THE JACK
FR9513392 1995-11-13

Publications (2)

Publication Number Publication Date
EP0773184A1 true EP0773184A1 (en) 1997-05-14
EP0773184B1 EP0773184B1 (en) 2000-10-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960402400 Expired - Lifetime EP0773184B1 (en) 1995-11-13 1996-11-12 Jack with an assembly of the barrel for the screw-threaded member of the jack

Country Status (3)

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EP (1) EP0773184B1 (en)
DE (1) DE69610683D1 (en)
FR (1) FR2741059B1 (en)

Cited By (1)

* 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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756108A1 (en) 1977-12-16 1979-06-21 Storz E A Kg Spindle operated car jack - works with captive nut in pivoted lifting arm and with sprung support clamps
DE3037934A1 (en) 1980-10-08 1982-05-13 E.A. Storz Gmbh & Co Kg, 7200 Tuttlingen Vehicle jack with hinging arm - has slots for spindle nut trunnions sloping downwards and inwards in leg
EP0327484A1 (en) 1988-01-18 1989-08-09 Batz, S. Coop. Ltda. Car jack
DE4130108A1 (en) 1991-09-11 1993-03-18 Storz E A Kg CAR LIFT

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756108A1 (en) 1977-12-16 1979-06-21 Storz E A Kg Spindle operated car jack - works with captive nut in pivoted lifting arm and with sprung support clamps
DE3037934A1 (en) 1980-10-08 1982-05-13 E.A. Storz Gmbh & Co Kg, 7200 Tuttlingen Vehicle jack with hinging arm - has slots for spindle nut trunnions sloping downwards and inwards in leg
EP0327484A1 (en) 1988-01-18 1989-08-09 Batz, S. Coop. Ltda. Car jack
DE4130108A1 (en) 1991-09-11 1993-03-18 Storz E A Kg CAR LIFT

Cited By (1)

* 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

Also Published As

Publication number Publication date
FR2741059A1 (en) 1997-05-16
DE69610683D1 (en) 2000-11-23
EP0773184B1 (en) 2000-10-18
FR2741059B1 (en) 1998-01-30

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