EP0197109B1 - Cric pour vehicules, en forme de pince double - Google Patents

Cric pour vehicules, en forme de pince double Download PDF

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Publication number
EP0197109B1
EP0197109B1 EP19850905051 EP85905051A EP0197109B1 EP 0197109 B1 EP0197109 B1 EP 0197109B1 EP 19850905051 EP19850905051 EP 19850905051 EP 85905051 A EP85905051 A EP 85905051A EP 0197109 B1 EP0197109 B1 EP 0197109B1
Authority
EP
European Patent Office
Prior art keywords
scissor
arm
arms
vehicle jack
guide slot
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
EP19850905051
Other languages
German (de)
English (en)
Other versions
EP0197109A1 (fr
Inventor
Peter Brosius
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
Application filed by August Bilstein GmbH filed Critical August Bilstein GmbH
Publication of EP0197109A1 publication Critical patent/EP0197109A1/fr
Application granted granted Critical
Publication of EP0197109B1 publication Critical patent/EP0197109B1/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 double-scissor jack with four scissor arms connected to each other to form a handlebar corner, with a hand-operated threaded spindle passing through the handlebar corner, which is mounted on opposite pairs of scissor arms with a spindle nut and with a spindle abutment, with the top and bottom Joints connecting scissor arms with one another and with a support part which is pivotally connected to a scissor arm of one pair of scissor arms and has a guide slot forming a sliding joint guide, which is arranged vertically on the spindle side of the pivot joint of the support part and into which a control part acted upon by a scissor arm of the other pair of scissor arms engages.
  • jacks When lifting a motor vehicle, jacks must absorb not only vertical but also horizontal forces. Such horizontal forces arise, for example, from the approximately circular-arc movement of the raised wagon side about the axis determined by the wheels resting on the floor.
  • each scissor arm is connected to the associated head or foot piece via a special axis.
  • the forces acting horizontally on the jack are dissipated via toothed segments which are present at the ends of the scissor arms on the foot or head piece side and mesh with one another. So that these toothed segments can absorb the forces that occur in practice, the material thickness of the legs of the scissor arms must be chosen to be correspondingly large. These jacks are therefore heavy and expensive. It is also known to produce additional tooth segments and to attach them to the scissor arms. Although this reduces the weight of the jacks, these remain expensive due to the special manufacture of the additional toothed segments and their attachment to the scissor arms.
  • a jack is known, in which a simplification of the structure is achieved in that the two pairs of scissor arms are connected to each other at the top and bottom by simple joints.
  • the pairs of scissors arms form a parallelogram of the handlebars and have eccentrically rounded ends with which they are supported in pairs on the inner wall of the head or foot piece.
  • the vertical bearing formed by this support only works optimally when the support surface on the motor vehicle and the footprint of the foot part are parallel to one another, which is not always ensured, in particular when the jack is attached to the motor vehicle.
  • a jack of the type mentioned is known, in which the control part engaging in the guide slot is acted upon by a control arm which is arranged in parallel with a scissor arm carrying the support part and articulates on two further scissor arms.
  • This results in a very complex construction which, due to the additional control arm parallel to the scissor arm, is built vertically high and consequently also has a considerable height in the transport position.
  • Such a jack can hardly be used if the ground clearance in the area where the jack is attached is low.
  • the invention is therefore based on the object of improving a double-scissor jack of the type mentioned in such a way that, with a simple structure, proper control of the jack is achieved only by using the supporting part.
  • the main purpose of this is the conventional rotatable articulation of a scissor arm, which is achieved in the jack according to the invention by extending one scissor arm beyond its connecting joint to the other scissor arm.
  • the support member cannot move vertically or horizontally relative to the scissor arm supporting it.
  • the control of the support part is taken over by the other scissor arm, which engages with a control part in the guide slot and thereby the movement of the Support part can be controlled in the desired manner by appropriate arrangement on the scissor arm and engagement in a correspondingly designed guide slot.
  • the jack receives an anti-lateral tipping stabilization in notebookbe rich and / or a corresponding vertical posture of the support member in the head area.
  • the improved or safer control of the support part is associated with greater load-bearing capacity or resilience of the vertical bearing.
  • the support part is U-shaped and has in its side cheeks projecting beyond the connecting joint connecting the two scissor arms each a guide slot for the control part designed as a control axis.
  • Such U-shaped support parts are known in conventional jack structures and their advantages of simple design and conventional processing can consequently be transferred to the jack according to the invention.
  • the distances between the connecting joints of both arms from the pivot of the extension of one arm and from the control part are the same size. This essentially results in a vertical guidance of the support part or the handlebar polygon when the support part is used as a foot piece. At the same time it is achieved that the vertical length of the support part and its width can be kept comparatively small without impairing a simple design of the control. A particularly unproblematic guidance results when the control slot of the control part is a vertical slot.
  • an upper and a lower support part are designed as a head and foot piece of the jack, which surround the scissor arms with side cheeks on the outside.
  • this jack the head and foot piece or their side cheeks in the areas of the pivot joints of the extensions of the scissor arms are loaded in a conventional manner.
  • the control parts or control axles need to remove only relatively small horizontal loads, so that their guidance in the guide slots is unproblematic. Special wear is avoided and costly reinforcement of the material thickness of the legs is not necessary.
  • the head and foot section of the jack largely cover the articulation points and the end areas of the scissor arms, which increases the safety of the jack, but also enables a comparatively large footprint.
  • control parts of the head and foot piece are arranged approximately in the plane of the swivel joints of the extensions of the scissor arms located on the head and foot piece.
  • At least one guide slot forms a control curve which allows the head piece of the jack to follow the vehicle movement during the lifting process.
  • the jack shown in Fig. 1 has four scissor arms 10 to 13, of which the scissor arms 10, 11 and 12, 13 each form a pair of scissor arms.
  • the scissor arms 10 to 13 form a handlebar polygon or parallelogram, which is penetrated by a horizontal threaded spindle 14. This has a spindle head 15 for engaging a hand crank and is via a z.
  • the threaded spindle 14 passes through a cylindrical bore of the bearing sleeve 18 and engages with its opposite end in a spindle nut, not shown, the bearing pins 19 of which form a joint for the scissor arms 10, 11.
  • the two hinge points or pins 17, 19 are moved towards or away from each other, so that the jack either stretches to lift the motor vehicle or folds it down to lower the motor vehicle and into a transport position which takes up little space to get.
  • support parts 20, 21 are present, which function as the head and foot of the jack.
  • the jack With the lower support part 21, the jack is placed on a floor surface and the upper support part 20 is attached to the motor vehicle when the jack is raised, for which purpose the fork part 22, which is firmly connected to the support part 20, is used. This prevents lateral relative slipping between the motor vehicle and the support part 20.
  • the support parts 20, 21 are each U-shaped and include with their side cheeks 20 ', 21' the upper and lower ends of the scissor arms 10, 12 and 11, 13, each of which is designed either as a parallel tab spaced by spacers or as U-shaped parts. In this case, understand that the webs connecting the side cheeks of the scissor arms in their articulation area are notched in the area in which the other scissor arm must move.
  • connection of the scissor arms 10, 12 and 11, 13 takes place with connecting joints 23 designed as joint axes in a rotatable manner.
  • the connecting joints 23 are each located in such a way that the arms 12, 13 have arm extensions 24, which act on the support parts 20, 21 so as to be rotatable with swivel joints 25.
  • the center distances x, y between the rotary joints 25 and the connecting joints 23 are each of the same size.
  • control parts 27 which are designed as control axes and which engage in these guide slots 26.
  • the control parts 27 are arranged parallel to the axes of the joints 23, 25. Their distances x 'and y' from the connecting joints 23 are equal to the distances x, y of the rotary joints 25 from the connecting joints 23. This results in a vertical alignment of the support parts 20, 21 in the event that the guide slots 26 correspond to the illustration in FIG 1, 2 are vertical elongated holes.
  • these guide slots 26 arcuate, so that they control the support part 20 or the handlebar triangle formed from the scissor arms 10 to 13 in such a way that the support part 22 follows the vehicle movement during the lifting process, that is to say carries out a corresponding arcuate movement .
  • This precludes relative movements between the motor vehicle and the jack, which consequently maintains the desired stability.
  • the jack does not suffer any horizontal vertical movements in the area of the support piece 22.

Landscapes

  • 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)
  • Motorcycle And Bicycle Frame (AREA)
  • Handcart (AREA)

Abstract

Le cric pour véhicules, en forme de pince double possède quatre branches (10 à 13) reliées les unes aux autres par un polygone de guidage. Le cric comporte un arbre fileté (14) manuellement commandé, qui traverse le polygone et est supporté par une paire de pinces, l'une en face de l'autre, avec un écrou d'arbre et un palier d'appui (16). En haut et en bas il existe des articulations (23, 25) qui relient les pinces (10, 12; 11, 13) les unes aux autres. Le cric possède une partie de support (20, 21) qui est connectée aux pinces (10, 12; 11, 13) et possède une ouverture de guidage (26) qui sert de guide coulissant pour une articulation des pinces. Pour réaliser une conception simple offrant une commande parfaite du cric simplement par l'extension de la partie de support, au moins une partie (12) de l'une des pinces (12, 13) comporte un prolongement au delà de l'articulation qui se trouve à côté de l'élément (10) de l'autre pince (10, 11) et exerce un effet de rotation, grâce à ce prolongement (24), sur la partie de support (20), dans l'ouverture de guidage dont une partie de commande (27) de l'élément de pince (10) entraîne l'autre paire de pinces (10, 11).

Claims (7)

1. Cric de véhicule en forme de pince double, comprenant quatre bras de levier (10, 11, 12, 13) qui s'articulent les uns sur les autres pour former un polygone déformable, une vis à actionnement manuel (14), qui traverse le polygone déformable et qui est montée sur des paires de bras de levier opposées au moyen d'un écrou et d'un palier de vis (18), des articulations (23) qui relient les bras de levier les uns aux autres, en haut et en bas, et un élément d'appui (20, 21) qui est relié à rotation par une articulation pivot à un bras (12, 13) d'une paire de bras de levier et présente une fente de guidage (26) formant une coulisse à articulation qui est disposée verticalement sur le côté vis de l'articulation pivot (25) de l'élément d'appui et dans laquelle est engagé un élément de commande (27) sollicité par un bras de l'autre paire de bras de levier, caractérisé en ce qu'au moins un bras (12) de l'une des paires de bras de levier (12,13) se prolonge au-delà de l'articulation (23) qui se raccorde au bras (10) de l'autre paire de bras de levier (10, 11) et attaque, par son prolongement (24), l'articulation pivot (25) de l'élément d'appui (20) et en ce que le bras de levier (10 ou 11) qui sollicite l'élément de commande (27) engagé dans la fente de guidage (26), porte cet élément de commande (27).
2. Cric de véhicule selon la revendication 1, caractérisé en ce que l'élément d'appui (20) est en forme de U et présente, dans chacune de ses joues latérales (20') qui débordent au-delà de l'articulation de liaison (23) reliant les deux bras de levier (10, 12), une fente de guidage (26) pour l'élément de commande (27) réalisé sous la forme d'un axe de commande.
3. Cric de véhicule selon l'une des revendications 1 ou 2, caractérisé en ce que les distances (x, x' et y, y') qui séparent les articulations de liaison (23) des deux bras (10, 12 resp. 11, 13), d'une part, de l'articulation pivot (25) du prolongement (24) d'un bras (12, 13) et, d'autre part, de l'élément de commande (27) sont identiques.
4. Cric de véhicule selon l'une des revendications 1 à 3, caractérisé en ce que la fente de guidage (26) de l'élément de commande (27) est une boutonnière verticale.
5. Cric de véhicule selon l'une des revendications 1 à 4, caractérisé en ce qu'un élément d'appui supérieur et un élément d'appui inférieur (20, 21) constituent la pièce de tête et la pièce de pied du cric, pièces qui encadrent extérieurement les bras de levier (10, 12 resp. 11, 13) par leurs joues latérales (20', 21').
6. Cric selon l'une des revendications 1 à 5 caractérisé en ce que les éléments de commande (27) des éléments d'appui (20, 21) sont disposés sensiblement dans le plan des articulations pivots (25) des prolongements (24) des bras de levier (12, 13) qui sont situées sur les éléments d'appui (20, 21).
7. Cric selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins une fente de guidage (26) forme une came qui contraint un élément d'appui (20 ou 21) du cric à accompagner le mouvement du véhicule pendant l'opération de levage.
EP19850905051 1984-10-04 1985-10-02 Cric pour vehicules, en forme de pince double Expired EP0197109B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19848429156 DE8429156U1 (de) 1984-10-04 1984-10-04 Doppelscheren-wagenheber
DE8429156U 1984-10-04

Publications (2)

Publication Number Publication Date
EP0197109A1 EP0197109A1 (fr) 1986-10-15
EP0197109B1 true EP0197109B1 (fr) 1988-03-02

Family

ID=6771373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850905051 Expired EP0197109B1 (fr) 1984-10-04 1985-10-02 Cric pour vehicules, en forme de pince double

Country Status (5)

Country Link
EP (1) EP0197109B1 (fr)
AU (1) AU4958185A (fr)
DE (2) DE8429156U1 (fr)
ES (1) ES289302U (fr)
WO (1) WO1986002060A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD268229A1 (de) * 1988-01-14 1989-05-24 Suhl Hebezeugwerk Wagenheber
CA1302389C (fr) * 1988-02-11 1992-06-02 Rudolf Gruber Verin et composants connexes
GB2231859B (en) * 1989-05-19 1993-09-29 Land Rover Uk Ltd A jack for a vehicle
US5421369A (en) * 1992-12-30 1995-06-06 Combustion Engineering, Inc. Mechanically actuated plug
ES2138533B1 (es) * 1997-06-19 2000-09-16 Batz S Coop Ltda Gato de tijera.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR34858E (fr) * 1927-10-22
FR458793A (fr) * 1912-09-02 1913-10-18 Edgard Cremieu Javal Perfectionnements apportés à la construction des appareils élévateurs pliants
FR548718A (fr) * 1922-01-11 1923-01-22 Perfectionnements aux vérins de levage
GB266810A (en) * 1925-12-02 1927-03-02 Florence Fee Hern Improvements in or relating to lifting jacks and the like
FR692878A (fr) * 1930-03-28 1930-11-12 Cric pour véhicules automoteurs
GB424764A (en) * 1933-08-18 1935-02-18 Auncel Brian Fee Hern Improvements in and relating to lifting jacks and the like
FR2132577B1 (fr) * 1971-04-09 1975-09-26 Rousseau Jean
JPS6042159B2 (ja) * 1978-07-25 1985-09-20 アイシン精機株式会社 パンタグラフ形ジャッキ

Also Published As

Publication number Publication date
EP0197109A1 (fr) 1986-10-15
ES289302U (es) 1986-03-16
AU4958185A (en) 1986-04-17
WO1986002060A1 (fr) 1986-04-10
DE8429156U1 (de) 1985-02-28
DE3561715D1 (en) 1988-04-07

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