EP0221911B1 - Cric - Google Patents

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Publication number
EP0221911B1
EP0221911B1 EP86901812A EP86901812A EP0221911B1 EP 0221911 B1 EP0221911 B1 EP 0221911B1 EP 86901812 A EP86901812 A EP 86901812A EP 86901812 A EP86901812 A EP 86901812A EP 0221911 B1 EP0221911 B1 EP 0221911B1
Authority
EP
European Patent Office
Prior art keywords
control lever
standing leg
jack
support
footpiece
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
Application number
EP86901812A
Other languages
German (de)
English (en)
Other versions
EP0221911A1 (fr
Inventor
Ferdinand Alten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Bilstein GmbH
Original Assignee
August Bilstein GmbH
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 DE8513829U external-priority patent/DE8513829U1/de
Priority claimed from DE8522952U external-priority patent/DE8522952U1/de
Application filed by August Bilstein GmbH filed Critical August Bilstein GmbH
Publication of EP0221911A1 publication Critical patent/EP0221911A1/fr
Application granted granted Critical
Publication of EP0221911B1 publication Critical patent/EP0221911B1/fr
Expired 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 scissor jack with a supporting leg and a support arm pivotable thereon about a horizontal axis, which has a load head at its free end, with a rotatable threaded spindle which has a spindle nut on the one hand and a spindle abutment on the other hand at the upper end of the leg and at a joint attacks, which connects two support arms, one of which is articulated on the support arm and the other on the supporting leg, at the lower end of which a footplate having a support plate is fastened, and with a control lever serving to determine the carriage lifting angle at the start of the lifting process, which is rigidly attached to the sits on the support arm articulated on the support leg, projects beyond its hinge axis and can be supported on the ground side.
  • Such a jack is known from GB-A-2 030 108.
  • the control lever is designed as an extension of the support arm articulated on the supporting leg and engages with a guide pin in slots in the foot piece, which is U-shaped and has the guide slots for the pin in its vertical side cheeks.
  • the slots can have a curve shape so that the load head moves on a desired path when the motor vehicle is lifted. This is to prevent the jack from slipping when the motor vehicle is raised. Such a slipping away is to be feared when the jack's load head is no longer above its base or within the friction cone emanating from this base.
  • the guide curves of its foot piece can only have a single shape.
  • the known jack has only a certain lifting curve, which is optimized for a certain type of motor vehicle, because the motor vehicle has to be raised from different starting positions, namely from the lowest starting position with a fully loaded vehicle with flat tires as well as with an unloaded vehicle with intact tires.
  • the known vehicle jack is only suitable for a single type of motor vehicle.
  • a similar jack is known from DE-A1-2 427 443, the supporting leg of which has a rolling base provided with a flat contact surface or support plate at the lower end. With this roller foot or with its contact surface, the jack or its supporting leg can be adjusted with the correct inclined position. This jack also requires that it and its rolling foot or the position of the contact surface of the latter are adapted to the vehicle to be lifted.
  • the invention has for its object to improve a jack of the type mentioned so that it can be arranged regardless of the type of vehicle to be lifted in all positions from which the vehicle can be lifted without slipping.
  • control lever has an end free of the foot piece, with which the jack can be supported on the floor by a penetration recess of the support plate when the foot piece is formed as a rolling foot which is rigidly seated on the support leg.
  • the jack is therefore particularly simple and inexpensive. As soon as the motor vehicle is raised, the free end loses contact with the ground, and the supporting leg can pivot about its base point and follow the movement of the vehicle. As a result, moments resulting from the movement of the vehicle do not occur, as is the case with conventional scissor jacks.
  • the control lever can be kept compact.
  • control lever is provided at its free end with a support curve directed towards the supporting leg, so that a sufficiently large support surface is always available on the bottom side.
  • control lever is articulated on the foot part of the spindle actuation side from the support point for the supporting leg and on the support arm of the spindle actuation side of the articulated axis.
  • the control lever of the jack forms a permanent articulated connection between the support arm of the jack and the foot piece.
  • the control lever When the jack is in the lowest position, the control lever is arranged approximately parallel to the main leg.
  • the spindle actuation-side direct connection with the control lever causes its vertical position, so that the supporting leg is raised accordingly.
  • the support arm is raised above the support arms and thus its load head, the kinematics can be determined by choosing the position of the articulation points of the control lever so that the load head lies in the friction cone at all starting positions of the jack on the foot piece on the support leg.
  • the jack of the type mentioned above can be designed with regard to its sequence of movements and with respect to the movements of its control lever so that no significant constraints are exerted on this control lever when the motor vehicle is raised.
  • Such an interpretation of the construction of the jack However, there are limits, especially if the vehicles to be lifted have very different movement curves when lifting, which result in considerable and also unpredictable pivoting movements of the supporting leg, which strain the control lever.
  • the control lever can be a part which allows shape changes during the lifting process due to relative movements of its articulation points.
  • the control lever is made of hard rubber, for example, and can absorb or support the weight loads originating from the jack.
  • the material of the control lever allows a corresponding change in shape and thus the forced displacement of its articulation points.
  • Articulation points of the control lever can consist of axially fastened, sheet-metal axle pins which are formed by angling the support arm and by releasing the foot piece. Integral parts of the support arm and the foot piece are therefore sufficient to embody the articulation points of the control lever. Since the latter consist regularly of sheet metal and are formed as stamped parts, the articulation points or the axle pins forming them can be produced in one operation, that is to say together with other shaping processes in the production of the support arm and the foot piece. It is not necessary to use special axles or axle bolts to form the articulation points, which must have appropriate fasteners for their attachment to the jack, for example rivet heads or the like. The comparatively weakly dimensioned, sheet-metal axle pins suffice the loads that occur, that is to say from the Weight of the jack originating forces, or the forces deriving from the load on the jack and the possibly elastic control lever.
  • the supporting leg has, at its edges adjacent to the foot piece, stiffening webs directed outwards away from the control lever.
  • the latter provide the necessary stiffening of the support leg in the area of the support point on the foot piece and in the entire foot area of the support leg, but at the same time ensure that there is enough space between the stiffening webs to arrange the axle pins and also a voluminous control lever.
  • the main leg is supported at the highest lifting position of the load head against further swiveling movements directed towards the motor vehicle at an anti-slip strip arranged on the latter between the supporting point for the main leg and the motor-vehicle-side end of the foot piece, which ensures the lifting function of the jack by not allowing that the load head is pulled out of the area of the friction cone above the support point by the motor vehicle, but at the same time counteracting overloading of the control lever by undesired leg movements when the largest stroke position is exceeded.
  • axle pins have radial arm holding projections on both sides of their storage area for the control lever, which secure the position of the control lever on the axle pins.
  • the jack 10 consists essentially of a supporting leg 11 and a support arm 12 which is mounted on the supporting leg 11 so as to be pivotable about a horizontal axis 13.
  • the axis 13 is formed by journal 14 of a spindle nut, not shown, which is known per se and through which a threaded spindle 15 is screwed.
  • Support arms 16, 17 are connected to the support leg 11 and the support arm 12, specifically via articulated axes 18, 19, which are arranged in the upper half of the support arm 12 and in the lower half of the support leg 11.
  • the support arms 16, 17 are connected at its other ends via a joint (not shown), which is formed by a journal 20 of a spindle abutment 1.
  • One end of the threaded spindle 15 engages this spindle abutment, the other end of which, for example, can be turned by a hand crank be able to allow both rotational movements of the threaded spindle 15 and pivoting movements of the support arms 16, 17.
  • the spindle abutment and also the aforementioned spindle nut are known for example from DE-A-24 27 443.
  • a load head 21 in the form of a hinged support plate which is movable relative to the support arm 12 about a hinge axis 22.
  • the position of the load head on the support arm or on the hinge axis 22 is secured by a retaining tab 24.
  • the load head 21 has a support surface 23 for abutment on the floor of the motor vehicle to be lifted.
  • the design of the load head 21 is described in detail in DE-C-28 01 735.
  • a foot piece 26 designed as a rolling foot, which is rigidly seated on the supporting leg 11 and has a rolling edge 28 between a setting surface 27 and a standing surface 29.
  • the setting surface 27 defines a support region of the foot piece 26, above which the center of gravity S is arranged, so that the jack 10 can be placed on the floor 30 without tilting.
  • a control lever 31 is provided on the support arm 17 on the supporting leg side, the bottom end of which is provided with a supporting curve 33 directed towards the supporting leg, which therefore appears convex from the floor.
  • the control cam 33 ensures that the control lever 31 can always be supported on the floor 30 with a sufficiently large support surface. Edge support is avoided.
  • the control lever 31 is directed deviating from the longitudinal axis of the support arm 17 towards the floor 30.
  • the hinge axis 19 can be arranged at a distance from the end of the supporting leg which can be seen in the figures, without having to do without the action of the control lever 31.
  • the supporting leg 11 and the support arm 12 consist, for example, of U-shaped supports, the U-bottom of which is cut away in the region of the pivot axis 13 in order to ensure the required freedom of movement.
  • the support arms 16, 17 are, for example, double lugs which are held at a distance from one another, but, if necessary, can also be profiled in a U-shape.
  • Fig. 2 shows a position of the jack, in which the journals 14, 20 have been moved closer together by actuating the threaded spindle 15 compared to Fig. 1, so that the arm polygon of the jack 10 is spread accordingly and the load head 21 is a high position over the foot piece 26 occupies.
  • the load head 21 follows the dotted movement path shown in FIG. 2.
  • This control of the load head 21 or the jack 10 is achieved by the appropriate dimensioning of the control lever 31.
  • Motor vehicles can be lifted from the lowest initial position of the jack according to FIG. 1 and from the highest initial position according to FIG. 2 without slipping. When the motor vehicle is lifted, the control lever 31 is clear of the floor 30 and the load head 21 follows the movement path of the body.
  • control lever 31 Since the control lever 31 according to FIG. 2 engages in the range of motion of the foot piece 26, which is rigidly seated on the supporting leg 11, this foot piece 26 must have a corresponding recess, or the control lever 31 must encompass the contact surface on both sides.
  • the spindle nut 14 ' is shown, through which the threaded spindle 15 is screwed.
  • a U-shaped bracket 52 engages on the journal 20, on whose U-bottom 53 a spindle bearing 54 is supported. At this spindle abutment 54 engages one end 15 'of the threaded spindle 15, the other end z. B. is twisted by a hand crank.
  • a foot piece 26 is articulated and designed as a support plate, which is thus fastened with a hinge axis 37 at the lower end 38 of the support leg 11 such that it can be folded.
  • a footprint 27 of this foot piece 26 is always on the floor 30, and to prevent slipping of the foot piece 26 on particularly smooth or to some extent compressible floors is a z.
  • B. made of rubber anti-slip bar 55 or 56 are arranged on the bottom.
  • the support point 41 of the supporting leg 11 on the foot piece 26 is arranged in the vicinity of the anti-slip strip 55 or the features 56.
  • the support leg 11 and the support arm 12 consist of U-shaped supports, as do the support arms 16, 17. In the latter, the U-bottoms in the area of the spindle abutment 54 are widened outwards so that when the jack 10 is completely cranked together for the spindle abutment 54 to create required space.
  • the U-bottom of the supporting leg 11 is recessed in the area of its lower end 38.
  • the edges 57 present in the area of the recess 58 and formed by the U-legs of the supporting leg 11 have outward-facing stiffening webs 51.
  • the stiffening webs 51 are shaped such that they can be arranged parallel to the foot piece 26 or to the contact surface 27 thereof when the jack 10 is in the rest position, provided that they are formed on the spindle actuation side of the support point 41. Insofar as the stiffening webs 51 are arranged on the motor vehicle side from this support point 41, they run at an angle which can be seen from the drawing and allow the supporting leg 11 to be supported on the foot piece 26 in the largest stroke position. They therefore form a stand area 29.
  • a control lever 40 is arranged in the recess 55 between the side cheeks 59 of the supporting leg 11, which is mechanically coupled on the one hand to the support arm 17 and on the other hand to the foot piece 26.
  • the coupling takes place at the articulation points 42, 43.
  • the articulation point 42 lies approximately in the horizontal Level of the articulation axis 37, while the articulation point 43 is arranged below the connecting line 48, which connects the articulation axis 19 to the articulation 20.
  • the control lever 40 is comparatively short.
  • the jack can also be cranked together very flat without the control lever 40 interfering with it.
  • the articulation points 42, 43 are formed by axle pins 44, 45, cf. Fig. 5. These axle pins 44, 45 are integral components of a bend 46 of the support arm 17 and a notch 47 of the foot piece 26.
  • Figs. 4 and 5 show that the bend 46 is a double one, namely from the plane of the U-bottom of the support arm 17 to the hinge axis 19 on the one hand and also parallel to this hinge axis 19.
  • the bend 46 penetrates the control lever 40 and has radial arm holding projections 49, 50 on both sides thereof, which serve to secure the position of the control lever 40.
  • these arm holding projections 49, 50 can be produced by punching the bend 46 made of sheet-metal material of the support arm 17 wider than it corresponds to the hole diameter of the control lever 40.
  • axle pins 44, 45 of the bend 46 or the notch 47 which are produced by punching out, can either remain square as shown in FIG. 4 or are rounded during manufacture of the support arm 17 in one operation with this manufacture.
  • the control lever 40 has the axle pins 44, 45 correspondingly adapted holes that allow relative positions between it and the support arm 17 or the foot piece 26. If the control lever 40 consists of an elastic material, thus allowing changes in shape, for example hard rubber, the assembly of the control lever 40 with the foot piece 26 or the support arm 17 is possible in that the control lever 40 is pushed over the arm holding projections 49 and onto the Axle pins 44, 45 snap on. If the control lever 40 is not elastic, for example made of steel, the arm holding projections 49 must be made after the control lever 40 has been pushed onto the axle pins 44, 45, e.g. B. by squeezing.
  • the jack 10 When lifting the motor vehicle from an initial or position of the jack 10, the jack 10 is not exerted to the left or right shifting horizontal forces, and this can both motor vehicles 3 from the lowest initial position of FIG. 3 as well as from any initial position above it until it reaches the largest stroke position according to FIG. 4 with the vehicle raised

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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)

Abstract

Le cric (10) possède une jambe d'appui (11) comportant un bras de support (12) articulé sur un axe horizontal et présentant à son extrémité libre une tête de charge (21). Le cric (10) est pourvu d'une broche filetée rotative (15), dont l'une des extrémités passe dans un écrou se trouvant à l'extrémité supérieure de la jambe d'appui et dont l'autre extrémité tourne dans un palier fixé à une articulation reliant deux bras de support (16, 17), dont l'un est articulé sur le bras de support (12) et l'autre sur la jambe d'appui (11), qui comporte à son extrémité inférieure un pied (26). Pour que le cric (10) puisse être mis en position indépendamment du type de véhicule à lever et que le véhicule puisse être élevé sans glissement, il possède un levier (31) servant à la fixation de son inclinaison au début du levage. Le levier (31) est fixé sur le bras de support (17), qui est articulé sur la jambe d'appui (11), dépassant l'articulation (19) et s'arc-boutant sur le sol. En variente, le levier (31) est d'une part en appui sur le pied (26), qui est articulé sur la jambe d'appui (11), et d'autre part fixé directement au bras de support (17) au-dessus de l'axe d'articulation (19).

Claims (9)

1. Cric à ciseaux (10) comportant une jambe de soutien (11) et un bras porteur (12) pouvant pivoter sur celle-ci autour d'un axe horizontal (13) et présentant à son extrémité libre (33) une tête porte-charge (21), une tige filetée (15) manoeuvrable par rotation et qui, par l'intermédiaire d'un écrou d'une part et d'une butée de tige filetée d'autre part, agit sur l'extrémité supérieure de la jambe de soutien ainsi que sur une articulation reliant l'un à l'autre deux bras-supports (16, 17) dont l'un est articulé sur le bras porteur (12) et dont l'autre est articulé sur la jambe de soutien (11) à l'extrémité inférieure de laquelle est fixé un pied (26) présentant une plaque de pose (27), et un levier de commande (31) servant à déterminer l'inclinaison du cric au début du processus de levage, rigidement fixé au bras-support (17) qui est articulé sur la jambe de soutien (11), se prolongeant au-delà de l'axe d'articulation (19) de ce bras-support, et pouvant s'appuyer contre le sol, caractérisé en ce que le levier de commande (31) présente une extrémité (33) qui est dégagée du pied (26) et par laquelle le cric (10), lorsqu'il est placé contre le véhicule, peut s'appuyer sur le sol (30) en passant à travers un évidement de passage de la plaque de pose (surface de pose 27), le pied (26) étant conçu sous la forme d'un pied de roulage rigidement fixé à la jambe de soutien (11).
2. Cric selon la revendication 1, caractérisé en ce que le levier de commande (31) est muni, à son extrémité libre (33), d'une surface d'appui coudée en direction de la jambe de soutien (11).
3. Cric selon la revendication 1 ou 2, caractérisé en ce que le levier de commande (31) est fixé au bras-support (17) et dirigé vers le sol (30) en s'écartant de l'axe longitudinal de ce bras.
4. Cric à ciseaux (10) comportant une jambe de soutien (11) et un bras porteur (12) pouvant pivoter sur celle-ci autour d'un axe horizontal (13) et présentant à son extrémité libre (33) une tête porte-charge (21), une tige filetée (15) manoeuvrable par rotation et qui par l'intermédiaire d'un écrou d'une part et d'une butée de tige filetée d'autre part, agit sur l'extrémité supérieure de la jambe de soutien ainsi que sur une articulation reliant l'un à l'autre deux bras-supports (16, 17) dont l'un est articulé sur le bras porteur (12) et dont l'autre est articulé sur la jambe de section (11) à l'extrémité inférieure de laquelle est articulé un pied (26), et un levier de commande (40) servant à déterminer l'inclinaison du cric au début du processus de levage, caractérisé en ce que le levier de commande (40) est articulé sur le pied (26), côté manoeuvre de la tige filetée par rapport à l'axe d'articulation (19).
5. Cric selon la revendication 4, caractérisé en ce que le levier de commande (40) est une pièce qui autorise les modifications de forme imposées, lors du processus de levage, par les mouvements relatifs de ses positions d'articulation (42, 43).
6. Cric selon la revendication 4 ou 5, caractérisé en ce que les positions d'articulation (42, 43) du bras de commande (40) sont constituées par des axes (44, 45) de l'épaisseur d'une tôle, fixés à une extrémité et sont formés par un coude (46) du bras-support (17) et par un évidement (47) du pied (26).
7. Cric selon une ou plusieurs revendications 4 à 6, caractérisé en ce que la jambe de soutien (11) présente, à ses bords (57) voisins du pied (26) des nervures de renfort (51) dirigées vers l'extérieur en s'éloignant du levier de commande (40).
8. Cric selon une ou plusieurs des revendications 4 à 7, caractérisé en ce que, en position de course haute de la tête porte-charge (21), pour éviter d'autres mouvements de pivotement dirigés vers le véhicule, la jambe de soutien (11) s'appuie contre une bande antidérapante (55) disposée sur le pied (26), entre l'extrémité de celui-ci qui est située du côté du véhicule et la position d'appui (41), de la jambe de soutien (11).
9. Cric selon une ou plusieurs des revendications 6 à 8, caractérisé en ce que les axes (44, 45) présentent, des deux côtés de leur zone d'appui pour le levier de commande (40), des saillies radiales (49, 50) de maintien sur le bras.
EP86901812A 1985-05-10 1986-03-20 Cric Expired EP0221911B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8513829U 1985-05-10
DE8513829U DE8513829U1 (de) 1985-05-10 1985-05-10 Wagenheber
DE8522952U 1985-08-09
DE8522952U DE8522952U1 (de) 1985-08-09 1985-08-09 Wagenheber

Publications (2)

Publication Number Publication Date
EP0221911A1 EP0221911A1 (fr) 1987-05-20
EP0221911B1 true EP0221911B1 (fr) 1989-08-09

Family

ID=25950336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86901812A Expired EP0221911B1 (fr) 1985-05-10 1986-03-20 Cric

Country Status (10)

Country Link
US (1) US4765595A (fr)
EP (1) EP0221911B1 (fr)
JP (1) JPH064479B2 (fr)
KR (1) KR930003322B1 (fr)
AU (1) AU5662986A (fr)
BR (1) BR8606670A (fr)
DE (1) DE3664900D1 (fr)
ES (1) ES294056Y (fr)
WO (1) WO1986006707A1 (fr)
YU (1) YU44700B (fr)

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DE9015832U1 (de) * 1990-11-20 1991-02-07 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber

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DE8902808U1 (de) * 1989-03-08 1989-05-03 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
DE9015483U1 (de) * 1990-11-12 1991-01-31 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
DE9005572U1 (de) * 1990-05-16 1990-07-19 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
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FR2692241B1 (fr) * 1992-06-12 1997-06-20 Fabrication Accessoires Automo Cric a vis du type a quadrilatere deformable, pour vehicule automobile.
DE4314136C2 (de) * 1993-04-30 1995-05-24 Bilstein August Gmbh Co Kg Wagenheber
ES2096541T3 (es) * 1995-06-20 2005-02-01 Thyssenkrupp Bilstein Gmbh Elevador de vehiculos.
US5975497A (en) * 1998-01-06 1999-11-02 Norco Industries, Inc. Multipiece trunnion for a scissor type jack
DE19804334C2 (de) * 1998-02-05 2003-05-28 Thyssen Krupp Bilstein Gmbh Wagenheber
US20050092975A1 (en) * 2003-10-31 2005-05-05 Tarra Charles J. Airplane jack
US6799749B1 (en) 2003-12-15 2004-10-05 Dura Global Technologies, Inc. Slim pantograph jack
DE102004003177B4 (de) * 2004-01-22 2005-10-20 Thyssen Krupp Bilstein Gmbh Wagenheber
US7073763B1 (en) 2004-09-14 2006-07-11 Trout Kenneth R Support rod for stabilizing an existing scissor jack
US9569912B2 (en) 2008-06-26 2017-02-14 Shopatm Bv (Sarl) Article storage and retrieval apparatus and vending machine

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Publication number Priority date Publication date Assignee Title
DE9015832U1 (de) * 1990-11-20 1991-02-07 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber

Also Published As

Publication number Publication date
YU74986A (en) 1989-06-30
JPS63500165A (ja) 1988-01-21
AU5662986A (en) 1986-12-04
EP0221911A1 (fr) 1987-05-20
ES294056Y (es) 1987-08-01
JPH064479B2 (ja) 1994-01-19
DE3664900D1 (en) 1989-09-14
ES294056U (es) 1986-12-16
BR8606670A (pt) 1987-08-11
YU44700B (en) 1990-12-31
WO1986006707A1 (fr) 1986-11-20
KR870700569A (ko) 1987-12-30
US4765595A (en) 1988-08-23
KR930003322B1 (ko) 1993-04-26

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