EP0636572B1 - Cric de levage, notamment pour vehicule automobile - Google Patents
Cric de levage, notamment pour vehicule automobile Download PDFInfo
- Publication number
- EP0636572B1 EP0636572B1 EP19940401514 EP94401514A EP0636572B1 EP 0636572 B1 EP0636572 B1 EP 0636572B1 EP 19940401514 EP19940401514 EP 19940401514 EP 94401514 A EP94401514 A EP 94401514A EP 0636572 B1 EP0636572 B1 EP 0636572B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jack
- clevis piece
- quadrilateral
- links
- screw
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
- B66F3/12—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated comprising toggle levers
Definitions
- the present invention relates to a lifting jack and, more particularly, to such a jack designed to be stored on the spare wheel of a motor vehicle.
- a jack of a type known, suitable to be stored in this way includes a head 1 intended for engage with the body of the vehicle to be lifted, a base 2 provided for then rest on the ground, first (3, 4) and second (5, 6) pairs of rods articulated on the head 1 and on the base 2, respectively, and connected between them by articulation pins 7, 8 substantially in the configuration a convex quadrilateral such as a rhombus.
- the jack still includes a clevis 9 inside the quadrilateral and mounted on the hinge pin 7 connected ends of a connecting rod 3 of the first pair and of a connecting rod 5 of the second pair, at the top of the quadrilateral, and an operating screw diagonal 10 rotatably mounted on the one hand in the hinge pin 8 of the connecting rods 4 and 6, at the opposite top of the quadrilateral, and on the other hand in a threaded part 11 additionally, mounted on the end of the yoke 9 which is opposite to the one articulated on the pin 7 so that this threaded part carries the load during the lifting phase.
- the yoke 9 makes it possible to reduce the size of the jack, in the position shown in Figure 1, relative to that of a jack of the type classic rhombus, with screw for maneuver also crossing the pin 7. In fact, in this position, the screw of a conventional jack would protrude from the pin 7 then as that of the jack in figure 1 is flush with it. Thanks to the geometry reduced dimensions of the latter due to the retraction of the screw, it is possible to install it inside contour 12 (shown in dashed line) the rim of a vehicle wheel.
- US-4,583,713 has proposed a jack intended to facilitate the installation under the vehicle.
- the operating screw has, at its end to be connected to the screw crank, a smooth portion free from move through the articulation of the connecting rods so as to allow automatic deployment of the jack, under the action of a spring, without it being necessary to drive the screw in rotation.
- the user can thus concentrate pay close attention to positioning the jack under the vehicle. It is nevertheless necessary, after setting up the jack, to activate the crank to catch up with the travel of the smooth portion across the joint. Many crank turns not directly used for vehicle lifting is still necessary and the use of the jack remains somewhat tedious.
- the present invention therefore aims to improve the jack of the figure 1 so that we can give it the geometry suitable for its storage on a wheel of a motor vehicle, by an operation simple and fast.
- FIG. 2 This is how we find in Figures 2 to 4 representing the jack according to the invention, organs identical to those referenced 1 to 8 and 10 in FIG. 1.
- a threaded piece 11 ' On the screw 10 is mounted a threaded piece 11 'which is distinguishes from part 11 of the jack of FIG. 1 in that that it takes the form of a substantially cylindrical axis of sufficient length for its ends to penetrate into two parallel buttonholes 13 drilled in two arms clevis parallels, articulated on the pin 7.
- the axis 11 ' is pierced with a threaded bore transverse for the passage of the operating screw 10.
- the jack is shown in position high, suitable for lifting the body of a vehicle automobile for changing a wheel.
- the 11 'axis is then in abutment with the straight ends (from the point of view of the figure) buttonholes 13, this abutment being moreover necessary for raising the jack by pulling connecting rods 3 and 5 to connecting rods 4 and 6.
- the jack in the low position shown in Figure 3.
- the axis 11 During the entire descent of the jack, the axis 11 'remains in abutment with the straight ends of the buttonholes due to the weight of the vehicle which tends to spread the connecting rods 3.5 from connecting rods 4.6.
- the size longitudinal of the jack In the position of Figure 3, the size longitudinal of the jack is too large for us to place it on the removed wheel, within the limits of rim 12 of this wheel, before storing the assembly in a vehicle housing for the spare wheel. So that this operation is possible, the jack must have the geometry shown in Figure 4, where its size along the axis of the screw 10 is made less than the diameter rim 12.
- the jack is passed from the geometry of Figure 3 to that of Figure 4, by a simple manual pull exerted between the head 1 and the base 2 in the direction of the arrows F, so that the axis 11 ' slides along the entire length of the buttonholes 13 to come in abutment on the left ends (from the point of view of Figure 4) of these buttonholes, adjacent to the pin 7.
- the position of these ends is determined so as to define for the jack a geometry appropriate to its storage. The operation is easy and instant. She eliminates the long and tedious operation of screw 10 which is necessary to bring the jack known in Figure 1 into the correct position.
- pin 7 must be drilled transversely with an unthreaded hole for the passage of the screw 10 when the jack is maneuvered to pass in its high position (see Figure 2), this hole in front besides accommodating a flat formed at the left end of the screw to prevent it from coming out of the axis 11 'in low position (figure 3).
- FIG. 5 shows a variant of the jack according to the invention which differs from that of Figures 2 to 4 by the presence of two parallel articulation axes 15.16, separate, connecting rods 3.4 respectively on the 9 '' yoke, axes 15 and 16 being symmetrically spaced longitudinal axes of the buttonholes 13. Axes 15 and 16 replace the single articulation pin 7 of the mode of Figures 2 to 4.
- the connecting rods 4 and 6 are mounted on a part 17 through which the screw 10 passes in the vicinity of its stirrup 20 of rotation, using two joints 18,19 respectively, spread apart like the axes 15,16.
- this arrangement increases the height above from the floor of the jack head, with maximum overall dimensions jack constant along the axis of the screw.
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)
Description
- la figure 1 est une vue en élévation du cric de la technique antérieure décrit dans le préambule de la présente description,
- les figures 2, 3 et 4 sont des vues en élévation du cric suivant l'invention, en position haute, basse et de rangement, respectivement, et
- la figure 5 est une vue en élévation d'une variante du cric suivant l'invention.
Claims (8)
- Cric de levage, notamment pour véhicule automobile, comprenant une tête (1), un socle (2) des première (3,4) et deuxième (5,6) paires de bielles articulées sur la tête (1) et sur le socle (2), respectivement, et connectées entre elles sensiblement dans la configuration d'un quadrilatère convexe, une chape montée sur les extrémités connectées d'une bielle (3) de la première paire et d'une bielle (5) de la deuxième paire, à un sommet du quadrilatère, et une vis de manoeuvre (10) diagonale montée à rotation d'une part sur la connexion (8) des deux autres bielles (4,6) de ces paires au sommet opposé du quadrilatère et d'autre part dans une pièce filetée complémentairement montée sur la chape en sorte que cette pièce filetée porte la charge pendant la phase de levage, caractérisé en ce que ladite pièce filetée (11') est montée mobile sur la chape (9';9'') entre deux positions prédéterminées écartées l'une de l'autre suivant l'axe de la vis (10).
- Cric conforme à la revendication 1, caractérisé en ce que celle desdites positions prédéterminées qui est la plus voisine du sommet adjacent du quadrilatère, définit une géométrie prédéterminée du cric qui convient à son installation dans un espace de rangement.
- Cric conforme à la revendication 2, caractérisé en ce que, dans ladite géométrie prédéterminée, il peut être installé dans l'espace délimité par la jante (12) d'une roue de secours d'un véhicule automobile.
- Cric conforme à l'une quelconque des revendications 1 à 3, caractérisé en ce que la pièce filetée (11') présente deux portées d'extrémité dimensionnées pour coulisser dans deux boutonnières parallèles (13) correspondantes de la chape, les extrémités de ces boutonnières définissant lesdites positions prédéterminées de la pièce filetée (11').
- Cric conforme à l'une quelconque des revendications 1 à 4, caractérisé en ce que la chape (9') est articulée autour d'un tourillon d'articulation (7) des extrémités des deux bielles (3,5) connectées à ladite chape (9').
- Cric conforme à l'une quelconque des revendications 1 à 4, caractérisé en ce que la chape est montée sur deux axes d'articulation parallèles (15,16) couplant chacun l'extrémité d'une des deux bielles (3,5) à ladite chape (9'').
- Cric conforme à la revendication 6, caractérisé en ce que les bielles (4,6) connectées au sommet du quadrilatère qui est opposé à celui dont déborde la chape (9''), sont articulées sur une pièce (17) traversée par la vis (10), au moyen de deux axes d'articulation parallèles (18,19), respectivement.
- Cric conforme à la revendication 7, caractérisé en ce que les extrémités d'au moins l'une des paires de bielles (3,5;4,6) connectées à la chape (9'') ou au sommet du quadrilatère opposé à cette chape sont positivement couplées en rotation par des secteurs dentés (211,212,213,214) ou de cames complémentaires.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9308053A FR2708243B1 (fr) | 1993-07-01 | 1993-07-01 | Cric de levage, notamment pour véhicule automobile. |
FR9308053 | 1993-07-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0636572A1 EP0636572A1 (fr) | 1995-02-01 |
EP0636572B1 true EP0636572B1 (fr) | 1998-09-16 |
Family
ID=9448787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19940401514 Expired - Lifetime EP0636572B1 (fr) | 1993-07-01 | 1994-07-01 | Cric de levage, notamment pour vehicule automobile |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0636572B1 (fr) |
DE (1) | DE69413335T2 (fr) |
ES (1) | ES2124378T3 (fr) |
FR (1) | FR2708243B1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PT771757E (pt) * | 1995-10-31 | 2002-05-31 | Proma Srl | Um macaco de suspensao com um sistema de rosca e braco de pantografo destinado em particular a ser utilizado em veiculos a motor |
KR200448000Y1 (ko) * | 2008-03-17 | 2010-03-09 | 삼기산업주식회사 | 팬터그래프 잭 |
EP2576756A1 (fr) | 2010-05-25 | 2013-04-10 | Lasi Srl | Appareil de fermentation amélioré |
WO2011148228A1 (fr) | 2010-05-25 | 2011-12-01 | Lasi S.R.L. | Appareil de fermentation amélioré |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092012A (en) * | 1977-01-13 | 1978-05-30 | Otsuka Koki Co., Ltd. | Ratchet type quick feeding mechanism for automobile pantograph jack |
FR2389571A1 (en) * | 1977-05-03 | 1978-12-01 | Noury Roger | Toggle type screw jack for automobile - has cover for screw thread to prevent user soiling hands |
SE445445B (sv) * | 1981-12-08 | 1986-06-23 | Volvo Ab | Domkraft innefattande en utvendigt gengad stang och ett invendigt gengat med stangen ingripande mutterelement |
JPS58173692U (ja) * | 1982-05-15 | 1983-11-19 | 株式会社三ツ知 | パンタグラフ式ジヤツキ |
JPS6112598A (ja) * | 1984-06-29 | 1986-01-20 | アイシン精機株式会社 | パンタグラフ式ジヤツキ |
US4720082A (en) * | 1986-01-08 | 1988-01-19 | Yang Tai Her | Guide rod drive method and structure using slidable drive screw nut set for generating drive feeding dependent on the speed change of the load |
-
1993
- 1993-07-01 FR FR9308053A patent/FR2708243B1/fr not_active Expired - Lifetime
-
1994
- 1994-07-01 DE DE1994613335 patent/DE69413335T2/de not_active Expired - Lifetime
- 1994-07-01 ES ES94401514T patent/ES2124378T3/es not_active Expired - Lifetime
- 1994-07-01 EP EP19940401514 patent/EP0636572B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69413335D1 (de) | 1998-10-22 |
FR2708243B1 (fr) | 1995-10-20 |
DE69413335T2 (de) | 1999-06-02 |
EP0636572A1 (fr) | 1995-02-01 |
FR2708243A1 (fr) | 1995-02-03 |
ES2124378T3 (es) | 1999-02-01 |
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