EP0636571B1 - Cric de véhicule - Google Patents

Cric de véhicule Download PDF

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Publication number
EP0636571B1
EP0636571B1 EP19940500129 EP94500129A EP0636571B1 EP 0636571 B1 EP0636571 B1 EP 0636571B1 EP 19940500129 EP19940500129 EP 19940500129 EP 94500129 A EP94500129 A EP 94500129A EP 0636571 B1 EP0636571 B1 EP 0636571B1
Authority
EP
European Patent Office
Prior art keywords
jack
cross shaft
wings
protuberances
accordance
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
EP19940500129
Other languages
German (de)
English (en)
Other versions
EP0636571A1 (fr
Inventor
José Antonio Palacio
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.)
Batz SCL
Original Assignee
Batz SCL
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
Priority claimed from EP93500113A external-priority patent/EP0666235A1/fr
Application filed by Batz SCL filed Critical Batz SCL
Priority to EP19940500129 priority Critical patent/EP0636571B1/fr
Publication of EP0636571A1 publication Critical patent/EP0636571A1/fr
Application granted granted Critical
Publication of EP0636571B1 publication Critical patent/EP0636571B1/fr
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 a vehicle jack of the mechanical type, which operate based on the action of a crank handle that causes a threaded spindle or worm screw to turn in such a way that it raises or lowers one arm with which the jack is provided, depending on the - direction in which the crank handle and the said worm screw are turned.
  • the worm screw passes through a cross shaft situated at the opposite end of the worm screw to the crank handle, with this cross shaft, on occasions, being connected to a holder plate on which the vehicle body is supported.
  • cross shafts are usually made of one single solid - part, sometimes made of plastic, which means that they are excessively heavy and also their cost is considerable.
  • cross shafts form part of the holder plates themselves, they are also usually made of one single piece of plastic material, which in general terms also causes - similar disadvantages.
  • the worm screw head on conventional jacks and the bent or cranked end of the crank handle connected to this head also - have the disadvantage that they are complicated to assemble and costly to make.
  • the end of the worm screw is turned (machined) for a - certain length and then swaged in order to form a broad end with which the cranked end makes contact by means of a longitudinal protrusion formed by stamping.
  • this cranked end can be inserted into the fork, it becomes necessary to make a specially-shaped hole in one wing of the said fork, and finally to make a lug on the - protruding end of the said cranked area.
  • Another disadvantage of known jack is the nut in which the threaded worm screw is lodged in order to raise or lower the jack.
  • these nuts are made of plastic, with their ends being - housed in holes cut in the U-shaped sections that are used for the arms of the jack. When these holes are made, it happens that on numerous occasions, the ends of the nut are sleared off due to the irregularities of the cross-section of the said holes, which concentrate stresses on a small portion of the cutting cross-section.
  • the spring in question is one more part which has to be fitted on the jack, which undoubtedly increases the cost of the whole.
  • One object of the invention is a vehicle jack which is provided with a cross shaft made out of sheet metal which is both more economical and lightweight.
  • an articulated jack is known about which is equipped with a base from which two geared arms stick out below, which are connected above to two other arms that cross over, which are passed through by a threaded spindle and these two in turn are connected to two more above which meet at a top spindle and are finished off by a grip for housing under the body of the vehicle.
  • the grip is a classic U-shaped part with wings tucked in that is held in place by the said wings by means of a solid fixed linchpin.
  • the head of the spindle is also equipped with a conventional nut which may be adjusted by a tool, for example a box spanner, with cross spindles on which some parts are mounted for allowing the spindle to pass through, these parts being in a U-shape with ends provided with sides, which allow it to turn for opening or closing the arms.
  • a tool for example a box spanner
  • cross spindles on which some parts are mounted for allowing the spindle to pass through, these parts being in a U-shape with ends provided with sides, which allow it to turn for opening or closing the arms.
  • this jack is a solution that is too intricate and has a large number of parts in it, especially arms, which also requires a considerable amount of strength to be applied when the jack is in its lowest position.
  • a Y-shaped jack is also known from the DE-A-2453260 with a fixed grip at the free end of the arm that turns around its body equipped with a base.
  • the arm is formed by two parallel panels connected by cross bars in a special shape.
  • the spindle passes through a conventional nut and its connection to the handle is achieved by means of an end part with a complicated design, to which the end of the said handle is also connected, which has a highly specialised shape especially manufactured for it.
  • Another object of the invention is a car jack which is provided with a cross shaft made out of sheet metal and which in its turn is connected to a holder plate, also made out of sheet metal.
  • Another object of the invention is a vehicle jack which has an assembly of a worm screw head, a fork connected to this worm screw and a cranked or bent end of the crank handle; an assembly which is easy to assemble, has less material and is cheap to manufacture.
  • Another object of the invention is a vehicle jack which is provided with a plastic nut, with reinforced ends, to be housed in the body of the jack and preventing the said ends from being sheared off.
  • Another object of the invention is a protuberance by way of a hook at the end of the raising arm of those jacks which have a mobile base, with this hook making contact with the centre part of the - mobile base.
  • the invention claims a cross shaft which is obtained starting from a metal sheet and worked in a progressive dieing press, which by means of successive operations forms a hollow shaft with two circular ends, with a cut in the manner of a chord and a central portion with a rectangular cross-section and with holes passing through two of its opposite faces. Two trunco-conical transmission areas are established between its ends and this central portion.
  • this cross shaft takes place on the wings of the U-shaped arms through holes or slots made previously in these - wings, whose cross-section can be suited to that of the said shaft at its ends.
  • the ends of the shaft have a set of protruding fins, which are later crimped or folded to make them fit or adapt to the outer surface of the wings of the U-shaped arms.
  • the two facing holes in the cross shaft - receive a pipe or tube which is riveted to the threaded worm screw so as to avoid any kind of unwanted movement.
  • the shaft in question is connected to a holder plate also made out of sheet metal and shaped in a progressive dieing press.
  • the holder plate in question is provided with a central area which is suited or matched in shape to the protuberance on the underbody of the vehicle in question and two wings which stand out at perpendicular - planes to the said central area.
  • the wings in question will take in - the wings of the U-shaped cross-section of the jack arm and aligned - holes are cut in them in order to receive the cross shaft.
  • the holes in question are of a particular geometry, based on a circular componente with a series of fins or lugs standing out - towards its centre, between which, obviously, a series of recess are - created, whose diameter corresponds to that of the basic hole.
  • One of these recesses is greater in size than the others, for the purpose of - allowing the cross shaft to be fixed in two different ways.
  • the sides of the shaft will be - fitted to the holes in the holder plate by proceeding to induction weld the front ends of the said sides to the fins or lugs of the holes in - the holder plate.
  • the facing holes in the holder plate take a trochilus shape, receiving the ends of the cross shaft and with fixing being carried out by means of electrode welding.
  • the fork takes a U-shape - starting from sheet metal, that two aligned holes are made in its wings, holes which cause two side lugs to be made of the same shape as the - said holes.
  • the end of the worm screw is housed directly into the - square hole in the base of the worm screw head and is secured by welding.
  • the cranked or bent end of the crank handle is inserted into the aligned holes in the wings of the said head, and later stamping takes place on the free end of the said cranked end, thus forming a protuberance on its circular cross-section, and this protuberance prevents the said cranked end from being extracted or removed later.
  • This solution for the jack is particularly advantageous, - since it uses less material than is used by known techniques, it is - very easy to assemble and more economical.
  • the nut used is a basic conventional part, made out of - plastic material, which logically is provided with and internally - threaded axial hole to engage with the worm screw of the jack. In its turn, it is also provided with two transverse cylindrical protuberances, by means of which the nut is fixed into the openings cut in the sides of the corresponding arm of the jack.
  • the said ends are encircled by metal reinforcing rings, by means of which the technical imperfection of the thickness of the openings in the arms of the jack are completely prevented from shearing the transverse ends with their rings and thus the nut is preserved indefinitely.
  • the reinforcing rings can be secured to the transverse - cylindrical ends of the nut by means of a clip-type connection cut in a non-working portion of the joint, i.e. in an area which is distant - from the portion that is subject to a function, as will be better - appreciated later in conjunction with the drawings.
  • Another solution for this connection consists of making a notch or groove in the side surface of the rings that determine an internal protuberance in the said rings, with this protuberance penetrating into the surface of the transverse cylinder ends of the nut.
  • the lifting arm is provided - with an end protuberance in the form of a downward-facing hook, with - this protuberance jutting out below the plane of the base of the U that is formed by the cross-section of the said lifting arm, with which the said hook rests in the centre of the mobile base, making contact with - it and avoiding the need for any spring to be placed on the cross shaft of the said mobile base.
  • a vehicle jack made up of two arms (1, 2) connected by means of the worm screw - (4), which is operated by the crank handle (5), so that when the crank handle is turned in one direction or the other, the arm (1) is raised or lowered, as shown in the two positions indicated by means of dotted lines.
  • the end of the worm screw (4) receives the cross shaft (7) and the holder plate (6), with the cross shaft connected at the position (8) with the said holder plate.
  • the arm (2) is held and supported on the ground by the portion (3) which is seamed or cramped to the arm (2) by a special process.
  • the end of the worm screw receives the head (9) with its - protuberances (10), and this head also receives the cranked end (11) of the crank handle, on which it is possible to appreciate the protuberance (12) that makes contact with the protuberance (10) on the head (9) so as to limit the turning of the end (11) of the crank handle (5).
  • FIG. 3 shows another vehicle jack in which the invention is applied.
  • the folded position of this jack is shown by the dotted lines.
  • the worm screw is received by the nut (36) and the cross shaft (7), - which is secured by the projections (18) being folded over the arms - (16, 17) once they have been inserted.
  • This vehicle jack stands on a base part (3).
  • the invention here covers a specific variant, according to which the inlet (32a) is carried out as a recess and not as a projection, inside the arm (31).
  • the windows or openings (43) and the legs (33) are maintained, so that these legs fold back in order to hold the cross shaft (7). See figures 4A and 5A.
  • the cross shaft (7) has to be shorter and logically lighter and cheaper than the ones traditionally used.
  • This cross shaft (7) as described, is arranged directly in the vehicle jack illustrated in Figs. 4 and 5, and secured by folding the legs (33) which prevent its being extracted later. These legs are a part of the cross shaft itself.
  • the vehicle jack in Fig. 3 has two pairs of protuberances or projections (18), not shown in Figs. 6 to 9, which are folded at - both ends once that cross shaft (7) has been inserted.
  • the assembly shown in Figure 10 is composed of the said - cross shaft (7) and the holder plate (25), which is also made from - sheet metal and pressed in a progressive die.
  • This holder plate has - the upper centre area of a specific shape, as well as some wings (26, 27), in which the aligned holes between which the cross shaft is situated can be appreciated.
  • the holes in question have radially arranged lugs (29), - between which recesses are formed.
  • the lugs (29) are situated in an - irregular manner, so that one of the recesses (30) is greater in size than the rest. In this way, two forms of arranging the cross shaft (7) in the holder plate are made possible.
  • Fig. 10 itself and in the later Fig. 11, whereas the other is as shown in Fig. 1.
  • the front edges (19) of the cross shaft are induction - welded to lugs (29) of the aligned holes in the holder plate (25), and in the second case, the facing holes in the holder plate would be of a trochilus shape, receiving the ends of the cross shaft (7), and with both being electrode welded together to secure them.
  • Figure 12 shows the position of the cross shaft (7) on the worm screw (4), which corresponds with that of the end of the jack also shown in Fig. 5.
  • the base of the worm screw head has a square hole (44) to receive the end of the worm screw (4), which is then welded to secure it in place.
  • the worm screw head (9) is the result of the transformation of the piece of sheet metal (9), as can be seen in Fig. 16.
  • Fig. 17 The arrangement of the worm screw head (9) on the worm - screw (4) and on the cranked portion (11) of the crank handle can also be seen in Fig. 17.
  • the worm screw is connected to the nut (36), which has already been represented in Fig. 2, and appears - again, in a different perspective, in Fig. 18.
  • the worm screw (4) goes through the threaded axial hollow (39) in the nut (36) and is connected to the sides of the arm of the jack by means of the cylindrical protuberances (37).
  • these protuberances receive the reinforcing rings that are - proposed by the invention, which preserve the whole of the nut from - establishing direct contact with the wings of the arm (39) of the jacks, as shown in Fig. 21.
  • Figure 19 shows how, in this position, the protuberance - (37) and reinforcing ring (8) are fastened together by means of a clip-type connection (40).
  • Figure 20 shows another variant, based on the groove or - notch (49) in the outer body of the ring, which creates a lug (42) - that penetrates into the protuberance (37).
  • FIG. 3 Another complementary detail of the jack is the fixing of the holder plate (13) (Fig. 3), on which a portion of the vehicle body rests.
  • This holder plate which in itself is known, has the particularity of its being fixed by means of a set of outer fins (43), which, - once that the holder plate is housed inside its inlet in the arm (14), fold back to fit tight with the outer surface.
  • Figs. 22 and 23 we point out the special shape of the lifting arm of the vehicle jack provided with a mobile base (52), which corresponds to the model shown in Figs. 4 and 5.
  • the protuberance (50) in the form of a hook, made on the arm (31), more specifically at its end below the portion (45) for the holder plate, with this hook protruding below the base (48) of the arm and after the position of the recess (49) that receives the cross shaft (54) of the mobile base.
  • the position (46) has been shown of the situation of the worm screw cross shaft and the position (47) in which it pivots on the other arm (55) of the vehicle 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 (11)

  1. Élévateur de voitures comportant des bras (1,2) joints par un arbre fileté (4) actionné à l'une des extrémités par une manivelle (6), un axe transversal (7) recevant l'extrémité de l'arbre et au bout duquel un mordache peut être également fixé, un écrou (3) actionné par l'arbre, où l'extrémité de la manivelle est façonnée spécialement pour être reliée à une pièce de conception spéciale au bout de l'arbre, de solides chevilles pour la fixation du mordache sur le bras correspondant et dont les caractéristiques sont les suivantes :
    un axe transversal (7), obtenu à partir de tôle métallique et en utilisant un outillage à séquence, qui est situé entre les ailes des arbres (1) de l'élévateur dans des trous effectués dans ces mêmes ailes.
    un mordache (25), généralement en forme de U, obtenu en utilisant un outillage à séquence à partir d'une tôle métallique, dont les trous alignés sont préparés dans les ailes (26, 27) afin de recevoir les extrémités de l'axe transversal, et ces ailes (26, 27) apparaissant à l'extérieur des ailes sur les arbres (1).
    une tête porte-broche (9) de coupe transversale en U comportant des trous (34) alignés dans ses ailes (35) et chacun d'eux présentant des protubérances latérales (10) des deux côtés, réalisées à l'aide des restes des trous cités. Ces derniers s `étendent des deux côtés de la base de la tête (9) et sont alignés avec elle. Sur cette base un trou carré (44) est effectué pour la réception de l'extrémité filetée de l'arbre (4), qui est ultérieurement soudée à ce trou.
    une partie (11) de la manivelle (5) placée entre les ailes (35) de la tête (9), surface plane, avec une extrémité en dehors des ailes (35) pourvue d'une protubérance (12) et est limitée en rotation par l'une des protubérances (10) de la tête (9).
    un écrou (36) dont les protubérances transversales (37) se trouvent dans des trous des ailes du bras (39) par le biais d'anneaux de renfort (38) métalliques qui entourent ces protubérances.
    une protubérance (50) en guise de crochet, fabriquée sur le bras élévateur (31) qui fait saillie vers la partie inférieure (48).
  2. Élévateur de voitures, conformément à la première réclamation, présente les caractéristiques suivantes : l'axe (7) possède une géométrie aux extrémités circulaires découpées en zones droites (22) telles des cordes. De même, il possède une zone centrale (20) à section rectangulaire dont deux des faces opposées sont percées par des trous alignés (23, 24), l'un des côtés est établi en tant que continuation de la partie droite des extrémités, des zones tronconiques (31) étant établies sur les deux parties, entre le centre et les extrémités.
  3. Elévateur de voitures, conformément à la première réclamation, présente les caractéristiques suivantes : les extrémités libres de l'axe (7), sont munis de protubérances (18) qui se rabattent directement sur les bras (16, 17) de l'élévateur.
  4. Élévateur de voitures, conformément à la première réclamation, présente les caractéristiques suivantes : l'axe est logé dans une partie évasée (33) du bras (31) de l'élévateur dont les parties latérales sont équipées de fenêtres ou d'ouvertures et où de petites pattes (33) se rabattent vers l'intérieur une fois que l'axe s'est introduit.
  5. Élévateur de voitures, conformément à la première et deuxième revendications, qui présente les caractéristiques suivantes : l'axe transversal (7) se soude aux trous alignés du mordache par induction, ces trous étant équipés de tenons radiaux (29) contre lesquels sont placés les fronts extrêmes (19) de l'axe.
  6. Élévateur de voitures, conformément à la première et à la deuxième revendications, qui présente les caractéristiques suivantes : les trous alignés du mordache (25) adoptent la forme de demi-rond, réalisant ainsi la fixation des deux au moyen d'une soudure par électrode.
  7. Élévateur de voitures, conformément à la première réclamation, qui présente les caractéristiques suivantes : les anneaux de renfort (38) fixés sur les protubérances (37) de l'écrou (36) comprennent un élément de fixation entre les deux, placé sur une zone (M), qui ne travaille pas, sur le bras (39) de l'élévateur.
  8. Élévateur de voitures, conformément à la première et à la septième revendications, qui présente les caractéristiques suivantes : les anneaux de renfort (38) sont installés sur les protubérances (37) par le biais d'un d'un raccordement de type bague (40).
  9. Elévateur de voitures, conformément à la première et à la septième revendications, qui présente les caractéristiques suivantes : les anneaux de renfort sont installés sur les protubérances (37) par le biais d'entailles (41) sur les anneaux qui déterminent des tenons internes (42) sur la superficie des protubérances.
  10. Élévateur de voitures, conformément à la première et la septième revendications, qui présente les caractéristiques suivantes : l'emplacement d'un mordache (13) est fourni, celui-ci est équipé d'ailettes saillantes (43) à une extrémité longitudinale. Elles se rabattent sur les parties extérieures des bras (14) une fois que le mordache est placé.
  11. Élévateur de voitures, conformément à la première et à la septième revendications, qui présente les caractéristiques suivantes : la partie (33) du bras (31) est réalisée en guise d'admission qui reçoit un axe transversal (7) moins long.
EP19940500129 1993-07-27 1994-07-19 Cric de véhicule Expired - Lifetime EP0636571B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19940500129 EP0636571B1 (fr) 1993-07-27 1994-07-19 Cric de véhicule

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP93500113 1993-07-27
EP93500113A EP0666235A1 (fr) 1993-07-27 1993-07-27 Cric de véhicule
EP19940500129 EP0636571B1 (fr) 1993-07-27 1994-07-19 Cric de véhicule

Publications (2)

Publication Number Publication Date
EP0636571A1 EP0636571A1 (fr) 1995-02-01
EP0636571B1 true EP0636571B1 (fr) 1999-06-09

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Application Number Title Priority Date Filing Date
EP19940500129 Expired - Lifetime EP0636571B1 (fr) 1993-07-27 1994-07-19 Cric de véhicule

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EP (1) EP0636571B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2130961B1 (es) * 1996-09-27 2000-03-01 Batz S Coop Ltda Gato para vehiculos.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1664579A (en) * 1925-06-08 1928-04-03 Twyman B Wickliffe Lifting jack
US3741524A (en) * 1970-09-18 1973-06-26 Auto Specialties Mfg Co Scissors jack
DE2453260A1 (de) * 1974-11-09 1976-05-13 Teves Gmbh Alfred Nach dem kniehebelprinzip arbeitender wagenheber
DE2936002A1 (de) * 1979-09-06 1981-03-26 E.A. Storz Gmbh & Co Kg, 78532 Tuttlingen Wagenheber
ES2030552T3 (es) * 1988-05-05 1992-11-01 E.A. Storz Gmbh & Co. Kg Gato elevacoches.
DE9015483U1 (de) * 1990-11-12 1991-01-31 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
DE4114129C2 (de) * 1991-04-30 1993-11-11 Bilstein August Gmbh Co Kg Wagenheber
DE4130108A1 (de) * 1991-09-11 1993-03-18 Storz E A Kg Wagenheber

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Publication number Publication date
EP0636571A1 (fr) 1995-02-01

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