EP0340551B1 - Cric - Google Patents

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Publication number
EP0340551B1
EP0340551B1 EP89107144A EP89107144A EP0340551B1 EP 0340551 B1 EP0340551 B1 EP 0340551B1 EP 89107144 A EP89107144 A EP 89107144A EP 89107144 A EP89107144 A EP 89107144A EP 0340551 B1 EP0340551 B1 EP 0340551B1
Authority
EP
European Patent Office
Prior art keywords
plastic body
jack
bearing
threaded rod
leg
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
EP89107144A
Other languages
German (de)
English (en)
Other versions
EP0340551A1 (fr
Inventor
Dieter Weiser
Franz Hafner
Thomas Pfeiffer
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.)
EA Storz GmbH and Co KG
Original Assignee
EA Storz GmbH and Co KG
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 DE19883815247 external-priority patent/DE3815247A1/de
Application filed by EA Storz GmbH and Co KG filed Critical EA Storz GmbH and Co KG
Publication of EP0340551A1 publication Critical patent/EP0340551A1/fr
Application granted granted Critical
Publication of EP0340551B1 publication Critical patent/EP0340551B1/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 jack with a stand column having two side walls, a support arm attached to it pivotably about a first transverse axis, a load carrier attached in the area of the free end of the support arm for attachment to a body, with a threaded spindle for the area in the area of the top stand end a first axial bearing and a second axial bearing and a support body supporting this are provided on the support arm at a distance from the first transverse axis, the support body being pivotally mounted on the support arm about a second transverse axis and the first axial bearing with pivot pins in the side walls of the standing column about a third transverse axis is pivotally mounted, which runs parallel to the first and second transverse axes, and with a hand crank on the column end of the threaded spindle for rotating the latter and pivoting the support arm relative to the column.
  • both the pedestal and the support arm are formed by sheet-metal parts with a U-shaped cross section
  • an axial bearing attached to the pedestal Threaded spindle is designed as a plastic nut with two molded pivot pins, the latter being rotatably mounted in bearing openings in the side walls of the pillar
  • a second axial bearing for the threaded spindle is supported on the side facing away from the pillar of a load carrier pivotally attached to this in the region of the free support arm end and is designed as a ball bearing.
  • a plastic body of the load carrier has a smooth bore penetrated by the threaded spindle and is pivotably mounted in the opening in the side walls of the support arm with two molded pivot pins.
  • such a jack can be designed so that the plastic body of the load carrier has a nut thread and the threaded spindle can be given away relative to the pedestal, but is not displaceable.
  • the plastic nut of such a jack can, however, be damaged by forces which are oriented transversely to the threaded spindle axis and occur between the threaded spindle and the plastic nut;
  • the cause of such forces can e.g. be that the lifted vehicle has a tendency to roll away or the jack has been attached to the body so that the plane defined by the column and support arm of the jack is not oriented perpendicular to the longitudinal axis of the vehicle - then the threaded spindle tries to widen the plastic nut or even the wall the threaded hole in the plastic nut.
  • the object of the invention was therefore to create a jack of the type mentioned at the outset in which the risk of damage to the plastic body which forms the spindle nut or the abutment body associated with the load carrier is at least considerably less than in the case of the jacks which have become known to date.
  • the object is achieved with respect to the abutment body assigned to the load carrier by the features of claim 2.
  • a further improvement can be achieved by the hinge pins of the spindle nut plastic body, at least partially encompassing metallic bearing shell segments, which are applied against the bearing surfaces of the pillar side walls by the forces acting in the direction of the spindle axis.
  • the bearing shell segments for the respective plastic body so that they are pressed against the bearing surfaces of the pillar or support arm side walls by the resulting forces from the threaded spindle tensile force and the force acting on the load carrier
  • the Bearing shell segments have openings for the latter, which are molded onto the hinge pins of the plastic body and which (in the direction of the resulting forces mentioned above) bear against the bearing surfaces of the relevant side walls of the pillar and / or support arm, so that the metallic bearing shell segments only come into play when the joints in question are so heavily loaded that the dangers described above occur.
  • the risk of damage to the plastic body or bodies in question by the forces acting in the direction of the threaded spindle axis can be further reduced by using a sheet metal part which not only forms the bearing shell segments, but also a support for the plastic body in question the forces acting in the direction of the spindle axis.
  • this abutment can take the form of a sheet metal part have formed wall, which is clamped between the plastic body and the second thrust bearing; in this case it is advisable to use an essentially pot-shaped or bowl-shaped sheet metal part which is placed on the plastic body from below.
  • the sheet metal part can also have the shape of a bracket, which is supported on the side of the plastic body facing the pedestal, is penetrated by the threaded spindle and on which the bearing shell segments are molded.
  • the forces exerted in the direction of the threaded spindle axis and exerted on the load carrier plastic body are transmitted not only via the joint pins to the bearing shell segments, but also from the actual plastic body itself via the abutment formed by the sheet metal part and those areas of the sheet metal part which are between it Abutment and the bearing shell segments.
  • Easier to produce than a pot-shaped sheet metal part which also forms a wall for the large-scale introduction of the forces acting in the direction of the spindle axis into the plastic body in question, is such a wall designed as a separate sheet metal part, so that, in a preferred embodiment, an abutment designed as a sheet metal part on the load carrier plastic body is provided for the forces acting in the spindle axis direction, which is clamped between the plastic body and the second axial bearing, since it is located on the side of the load carrier facing away from the hand crank.
  • an abutment designed as a sheet metal part on the load carrier plastic body is provided for the forces acting in the spindle axis direction, which is clamped between the plastic body and the second axial bearing, since it is located on the side of the load carrier facing away from the hand crank.
  • Such an embodiment of the load carrier plastic body and the sheet metal parts forming the bearing shell segments or the sheet metal parts forming the bearing shell segments is conducive to the same purpose to the threaded spindle tensile force and / or to the load acting on the load carrier and / or of the resultant from these forces, and in which the load carrier plastic body also has molded steps or shoulders for support on these edges.
  • the two plastic bodies of the known jacks one of which forms the nut for the threaded spindle and the other supports an axial bearing for the threaded spindle, have a guide shoulder with a longitudinal channel for the threaded spindle in addition to their pivot pins on one of the facing sides; it is then advisable to provide a sheet metal ring, which fits this projection, as a reinforcing element for these two guide lugs, each forming a projection of the plastic body in question.
  • the reinforcement ring according to the invention is particularly effective in jacks in which the cross section of the guide projection forming a projection decreases continuously in the direction of the mouth of its longitudinal channel if the reinforcement ring then has a corresponding cross-sectional profile (this of course applies regardless of whether for both plastic bodies or a reinforcing sheet metal ring is only provided for one of the two plastic bodies).
  • the guide projection will thus in particular have a frustoconical shape with a longitudinal channel, and the reinforcement ring then has the shape of a cone, which is pressed onto the guide projection by the forces acting in the longitudinal direction of the threaded spindle and the latter is consequently clamped in the reinforcement ring.
  • jacks are required to have high torque applied to the lead screw crank in the end position with the support arm raised to the maximum without damaging the jack.
  • This requirement can be met without great effort according to the invention by arranging a spacer sleeve on the threaded spindle between the two plastic bodies to limit the stroke of the support arm; If the two plastic bodies are provided with sheet metal parts according to the invention on the sides facing one another, this spacer sleeve is advantageously designed such that it has stop surfaces for these sheet metal parts and, consequently, not the plastic body itself runs onto the spacer sleeve, but rather the sheet metal parts provided on the two plastic bodies .
  • the embodiment of the jack according to the invention shown in FIGS. 1 and 2 has, like all other embodiments, a pedestal 10, a support arm 12, a load carrier 14, a threaded spindle 16, a crank handle 20 articulated thereon and a footplate 22 fastened to the lower end of the pedestal 10 on.
  • the pedestal 10 consists of a sheet-metal section with a U-shaped cross section with two side walls 24 and a rear wall 26 connecting them.
  • the support arm 12 is also a sheet-metal section with a U-shaped cross section with two side walls 28 and a base 30 connecting them. which, however, is somewhat narrower than the rear wall 26 of the pillar 10, so that the support arm 12 can engage with its right-hand end according to FIG. 1 between the side walls 24 of the pillar and can be pivotably mounted in the side walls 24 by means of a bolt 34.
  • the bolt 34 thus defines the first transverse axis in the sense of the claims.
  • the load carrier 14 is a plastic part, in particular made of the plastic available on the market under the registered trademark DELRIN, into which a groove 36 for receiving a sill seam web on one longitudinal side of the body of a vehicle to be lifted and the top side 38 thereof is molded forms a support for the body. Furthermore, short, practically disk-like pivot pins 40 are formed on both sides of the plastic body forming the load carrier 14, each of which defines a groove 42 between their end faces and the side surfaces of the actual load carrier 14. The edges of bearing openings 44 in the side walls 28 of the support arm 12 engage in these grooves, unless bearing shell segments are arranged between the pivot pin 40 and the bearing surfaces formed by the side walls 28 due to the design of the jack according to the invention; however, this will be discussed in more detail later.
  • a nut formed by a plastic body 46 is for the threaded spindle 16 is pivotally mounted at the upper end of the pedestal 10.
  • disk-shaped hinge pins 48 are formed on both sides of the plastic body 46, which form grooves 50 between their end faces and the side surfaces of the actual plastic body, into which the edges of bearing openings 52 engage in the side walls 24 of the pillar 10, unless bearing shell segments between the invention the pivot pin 48 and the bearing surfaces formed by the side walls 24.
  • the load carrier 14 has an optionally stepped channel 56 with a smooth wall for the passage of the threaded spindle 16, while a channel 58 with a nut thread for the threaded spindle 16 is formed in the plastic body 46.
  • the left end of the threaded spindle 16 according to FIG. 1 is formed into a mushroom-shaped head 60, between which and the load carrier 14 an axial bearing 62 designed as a roller bearing is arranged.
  • the pivot pin 40 thus define the second transverse axis, the pivot pin 48 the third transverse axis in the sense of the claims, while the nut formed by the plastic body 46 forms the first axial bearing and the bearing 62 the second axial bearing in the sense of the claims.
  • a sleeve 64 is pressed into the channel 56 of the load carrier 14, and according to the invention, a reinforcement bracket 68 designed as a sheet metal part is placed on a truncated cone-shaped shoulder 66 of the load carrier 14 penetrated by the channel 56 and has a pot-shaped area 70, consisting of a reinforcement ring 72 and a bottom 74 penetrated by the sleeve 64, as well as two lateral arms 76, to each of which a bearing shell segment 78 according to the invention is formed.
  • the reinforcing ring 72 which is of conical design according to the invention, fits on the frustoconical extension 66 of the plastic body forming the load carrier 14, and the bearing shell segments 78, which are L-shaped, but in particular U-shaped in cross section, fit snugly against the edges of the bearing openings 44 and the peripheral surfaces of the pivot pins 40.
  • the reinforcing bracket 68 of the load carrier 14 takes the place of the reinforcing pot 80 in the plastic body 46 forming the nut for the threaded spindle 16, consisting of a conical reinforcing ring 82, a bottom 84 penetrated by the threaded spindle 16 and two bearing shell segments 86 formed on the reinforcing ring in turn fit snugly against the circumferential surfaces of the pivot pins 48 and the edges of the bearing openings 52, while the reinforcing ring 82 fits appropriately on a frustoconical area of the plastic body 46.
  • the bearing shell segments 78 and 86 each extend over a little less than 180 ° and are formed symmetrically to that plane which runs perpendicular to the plane of the drawing in FIG. 1 through the axis of the threaded spindle 16.
  • the thrust bearing 62 bearing against the load carrier 14 not only presses the pivot pins 40 against the bearing shell segments 78, since the load carrier 14 with its shoulder 66 moves toward the crank end of the hand crank
  • the threaded spindle 16 is also supported on the conical reinforcing ring 72 and the base 74, which thus transmit part of the forces oriented in the longitudinal direction of the threaded spindle 16 to the bearing shell segments 78 via the arms 76 of the reinforcing bracket 68.
  • the U-shaped cross section of the bearing shell segments 78 and 86 also prevents the parts articulated on the support arm 12 or the pedestal 10 from being displaced in the direction of the axes of the pivot pins 40 or 48, because each of the bearing shell segments has the edge of the associated one with a type of collar Bearing opening 44 or 52 overlaps.
  • the reinforcing part 80 ' has no equivalent to the bottom 84, but only one reinforcing ring 82' and two bearing shell segments 86 '.
  • the bearing shell segments 86 ⁇ of a reinforcement pot 80 ⁇ each have an opening 100, through which an attachment 102 formed on the respective pivot pin 48 ⁇ engages, in such a way that the jack, which is normally loaded, only the attachments 102 slide on the edges of the bearing openings 52 of the pillar 10 forming the bearing surfaces, while when the jack is subjected to a critical load, the plastic lugs 102 are deformed such that also the metallic bearing shell segments 86 ⁇ come into play, ie they are pressed against the edges of the bearing openings 52.
  • the plastic body forming the nut for the threaded spindle 16 was designated as a whole by 46 ⁇ , otherwise the same reference numerals were used as in Figures 1 and 2.
  • FIGS. 6 to 8 show an embodiment of a reinforcement according to the invention for the load carrier 14, which, particularly with regard to the design and arrangement of the bearing shell segments, are also applied analogously to the plastic body 46 of the embodiment according to FIGS. 1 and 2 forming the nut for the threaded spindle could.
  • the load carrier 14 is inserted from above into a pot-shaped or shell-shaped reinforcing part 200 designed as a sheet metal part, which has a bottom 202, two side walls 204 and an abutment wall 206 and has U-shaped cross sections on its side walls Bearing shell segments 208 are formed.
  • a support area 210 is also formed on the sheet metal part, which supports the shoulder 66 of the load carrier 14 from below.
  • the abutment wall 206 is arranged between the thrust bearing 62 and the front end face of the load carrier 14, and, as a comparison of FIGS. 1 and 6 makes clear, the bearing shell segments 208 are designed and arranged such that they not only exert those in the longitudinal direction exerted by the threaded spindle Can transmit tensile forces to the side walls 28 of the support arm 12, but also the weight load resting on the load carrier 14.
  • a spacer sleeve 300 is arranged on the threaded spindle 16 between the reinforcement parts 68 and 80, which has a collar 302 at each end and rests with this against the adjacent reinforcement part when the support arm 12 has reached its upper end position. In this way it is achieved that the reinforcing parts 68 and 80 are supported on one another via the spacer sleeve 300 and that the two plastic bodies 14 and 46 are not pressed against one another.
  • the bearing shell segments can only encompass the pivot pins over part of the axial extent or the circumference of the pivot pins, but segments are preferred which only include the circumference of the pivot pins as far as required, but instead all sliding surfaces of the pivot pins with which they otherwise attach cover the side walls of the pillar or support arm.
  • bearing shell segments are provided with securing projections which are arranged on the outer sides of the side walls of the pillar or of the support arm and bear against these side walls, as is the case, for example, with the bearing shell segments which are U-shaped in cross section, they cause the edges of the bearing openings in the side walls overarching security approaches also that even high loads do not expand the pillar profile or the support arm profile and can thus lead to damage.
  • the design of the load carrier shown in FIGS. 9 and 10 differs from the embodiment according to FIGS. 6 to 8 in that instead of an abutment wall formed on a cup-shaped sheet metal reinforcement part, an abutment wall 306 formed as a separate part is attached to the load carrier 314 designed as a plastic body is.
  • the abutment wall 306 has a hole 307 for the passage of the threaded spindle 16 and is pressed by this or its axial bearing 62 against the load carrier 314.
  • the abutment wall 306 is designed as a flat shell, which can be pushed with its edges onto a correspondingly contoured area of the load carrier 314 from below (according to FIGS. 9 and 10) and is then held in this position by the threaded spindle.
  • a load carrier 414 is reinforced by a shell-shaped reinforcing part 400, which has a bottom 402, side walls 406 and bearing shell segments 408 integrally formed thereon and from which bottom 402 obliquely punched out abutment sheet metal tongues 410 and have been bent out, which engage in corresponding recesses 412 of the load carrier 414.
  • the thrust forces acting in the direction of the threaded spindle axis are partially transferred from the load carrier plastic body to the sheet metal reinforcing part 400 and thus via its bearing shell segments 408 to the sides walls 28 of the support arm 12 transmit, so that the power transmission from the load carrier 414 to the support arm 12 is not exclusively via the pivot pin 40 of the load carrier.
  • the bearing shell segments 408 are dimensioned and arranged such that the resulting forces from the threaded spindle tensile force and the load acting on the load carrier are approximately perpendicular to the central region of the bearing shell segments 408.
  • the reinforcement part 400 is designed in the side view so that its upward and forward edges 418, which bear against correspondingly extending steps 416 of the load carrier 414, can partially transmit the mentioned thrust forces and the resultant forces mentioned from the load carrier to the reinforcement part 400 and so also help to relieve the hinge pin 40.
  • each of the bearing shell segments is formed by a separate sheet metal part.
  • their pivot pins 40 are of slightly conical design, namely their diameter increases towards their free end, and the same applies to the bearing shell segments 508, so that they can be snapped onto the pivot pin 40.
  • the load carrier 514 is provided with load-transmitting steps 516, against which load-bearing edges 518 of the bearing shell segments 508 bear.

Claims (18)

1. Cric pour automobile comportant une colonne à pied présentant deux parois latérales, un bras porteur monté sur cette dernière pour pouvoir pivoter autour d'un premier axe transversal, un support de charge pour l'adaptation à une carrosserie et monté dans la zone de l'extrémité libre du bras porteur, une tige filetée pour laquelle sont prévus dans la zone de l'extrémité supérieure de colonne à pied un premier palier axial et sur le bras porteur à distance du premier axe transversal un second palier axial ainsi qu'un élément de butée s'appuyant sur ce dernier, l'élément de butée étant monté sur le bras porteur de façon à pouvoir pivoter autour d'un deuxième axe transversal, le premier palier axial étant formé par un élément en matière synthétique qui est réalisé sous une forme d'écrou et qui est porté par des pivots dans les parois latérales de la colonne à pied de façon à pouvoir pivoter autour d'un troisième axe transversal qui s'étend parallèlement aux premier et deuxième axes transversaux, une manivelle à l'extrémité du côté de la colonne à pied de la tige filetée pour la rotation de cette dernière et pour le pivotement du bras porteur par rapport à la colonne à pied, et comportant un élément de renforcement métallique pour l'élément en matière synthétique - écrou de tige présentant, dans la direction du support de charge, devant ses pivots une saillie qui est traversée par son canal fileté et qui est entourée par l'élément de renforcement, caractérisé en ce que l'élément de renforcement (82) présente un anneau en tôle (80) entourant à la manière d'une manchette la saillie de l'élément en matière synthétique-écrou de tige (46).
2. Cric pour automobile comportant une colonne à pied présentant deux parois latérales, un bras porteur monté sur cette dernière pour pouvoir pivoter autour d'un premier axe transversal et présentant aussi deux parois latérales, un support de charge pour l'adaptation à une carrosserie et monté dans la zone de l'extrémité libre du bras transporteur, une tige filetée pour laquelle sont prévus dans la zone de l'extrémité supérieure de colonne à pied un premier palier axial et sur le bras porteur à distance du premier axe transversal un second palier axial ainsi qu'un élément de butée s'appuyant sur ce dernier, l'élément de butée étant monté par des pivots dans les parois latérales du bras porteur pour pouvoir pivoter autour d'un deuxième axe transversal, le premier palier axial étant monté par des pivots dans les parois latérales de la colonne à pied pour pouvoir pivoter autour d'un troisième axe transversal qui s'étend parallèlement aux premier et deuxième axes transversaux, et comportant une manivelle à l'extrémité du côté de la colonne à pied de la tige filetée pour la rotation de celle-ci et pour le pivotement du bras porteur par rapport à la colonne à pied, caractérisé en ce que l'élément de butée (14) est réalisé sous la forme d'un élément en matière synthétique pour les pivots (40) duquel sont prévus des segments de coquille de coussinets métalliques qui entourent au moins partiellement ces pivots et qui peuvent être appliqués contre les faces d'appui (44) des parois latérales du bras porteur (28) par les forces agissant dans la direction de l'axe de tige.
3. Cric pour automobile suivant la revendication 1, caractérisé par des segments de coquille de coussinet métalliques (86) qui entourent au moins partiellement le pivot (48) de l'élément en matière synthétique-écrou de tige (46) et qui peuvent être appliqués contre les faces d'appui (52) des parois latérales de la colonne à pied (24) par les forces agissant dans la direction de l'axe de tige.
4. Cric pour automobile suivant la revendication 2, caractérisé en ce que le premier palier axial est formé par un élément en matière synthétique qui est réalisé sous une forme d'écrou (46) et qui présente, en direction du support de charge (14), devant ses pivots (48) une saillie traversée par son canal fileté (58) et entourée et renforcée par un anneau de tôle (80) en un genre de manchette.
5. Cric pour automobile suivant l'une ou l'autre des revendications 1 et 2, caractérisé en ce que les segments de coquille de coussinet (78, 86; 208) pour l'élément en matière synthétique (46 ou respectivement 14) sont réalisés et agencés de façon qu'ils soient pressés contre les faces d'appui (52 ou respectivement 44) des parois latérales de colonne à pied ou respectivement de bras porteur (24 ou respectivement 28) par les forces résultantes provenant de la force de traction de la tige filetée et de la charge agissant sur le support de charge.
6. Cric pour automobile suivant l'une ou l'autre des revendications 2 et 3, caractérisé en ce que les segments de coquille de coussinet (86˝) présentent des ouvertures (100) pour des saillies en matière synthétique (102) qui les traversent, qui sont façonnées sur les pivots (48˝) de l'élément en matière synthétique (46˝) et qui s'appuyent contre les faces d'appui (52) des parois latérales concernées (24).
7. Cric pour automobile suivant l'une ou l'autre des revendications 1 et 4, caractérisé en ce que l'anneau de tôle (82) est une partie d'un pot de renforcement (80) dont le fond (84) présente un trou pour le passage de la tige filetée (16).
8. Cric pour automobile suivant la revendication 7, caractérisé en ce que le pot de renforcement (80) et la saillie entourée par ce pot sont réalisés en une forme conique.
9. Cric pour automobile suivant la revendication 3, caractérisé en ce que les segments de coquille de coussinet (86) sont des parties constitutives de l'élément de renforcement (82).
10. Cric pour automobile suivant l'une quelconque des revendications 2 et 4 à 6, caractérisé en ce que sur l'élément en matière synthétique-support de charge (14) est prévu une butée (206), pour les forces agissant en direction de l'axe de tige, qui réalisée sous la forme d'une partie en tôle et qui est enserrée entre l'élément en matière synthétique (14) et le second palier axial (62) situé sur le côté du support de charge tourné à l'écart de la manivelle (20).
11. Cric pour automobile suivant l'une quelconque des revendications 2, 4 à 6 et 10, caractérisé en ce que les segments de coquille de coussinet (78) prévus sur le support de charge (14) sont des parties constitutives d'une partie en tôle (200) qui est réalisée essentiellement sous la forme d'un pot ou d'une coquille et qui est posée par le bas sur l'élément en matière synthétique.
12. Cric pour automobile suivant l'une quelconque des revendications 2, 4 à 6 et 10, caractérisé en ce que les segments de coquille de coussinet (78) prévus sur le support de charge (14) sont des parties constitutives d'une partie en tôle (74) formant une collerette qui est appliquée sur le côté de l'élément en matière synthétique (14) tourné vers la manivelle (20) et qui est traversée par la tige filetée (16).
13. Cric pour automobile suivant la revendication 12, caractérisé en ce que l'élément en matière synthétique (14) du support de charge présente une saillie de guidage (66), avec un canal longitudinal (56) pour la tige filetée (16), qui s'étend en direction de la manivelle (20) et en ce que la collerette (74) entoure de façon ajustée la saillie de guidage.
14. Cric pour automobile suivant l'une quelconque des revendications 2, 4 à 6 et 10, caractérisé en ce que les segments de coquille de coussinet (408) prévus sur le support de charge (14) sont des éléments constitutifs d'une partie en tôle (400) qui est réalisée essentiellement en forme de collerette et qui est posée par le bas sur l'élément en matière synthétique (14).
15. Cric pour automobile suivant la revendication 14, caractérisé en ce qu'un fond (402), de la partie en tôle (400) en forme de collerette, qui est appliqué par le bas contre l'élément en matière synthétique-support de charge (14) est pourvu de languettes de tôle-butées (410) qui font saillie à partir du fond vers le haut et vers l'avant et qui entrent en prise dans des évidements correspondants (412) de l'élément en matière synthétique (14).
16. Cric pour automobile suivant l'une quelconque des revendications 2 à 15, caractérisé en ce que la ou les parties en tôle (400; 508) qui forment des segments de coquille de coussinet (408; 508) présentent des bords (418; 518) qui s'étendent perpendiculairement à la force de traction de la tige filetée et/ou à la charge agissant sur le support de charge (14) et/ou aux résultantes de ces forces et en ce que l'élément en matière synthétique-support de charge (14) présente des gradins moulés (416; 516) pour l'appui sur ces bords.
17. Cric pour automobile suivant l'une quelconque des revendications 2 à 16, caractérisé en ce que les pivots (40) sont diminués en partant de leurs extrémités libres et en ce que les segments de coquille de coussinet (508) entourent complètement les pivots et les pivots sont réalisés en forme de cône correspondants.
18. Cric pour automobile suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'une douille d'écartement (300) comportant des surfaces de butée axiales (302) est agencée, pour la limitation de la course du bras porteur (12), sur la tige filetée (16) entre l'élément en matière synthétique-support de charge (14) et le premier palier axial (46) pour la tige filetée.
EP89107144A 1988-05-05 1989-04-20 Cric Expired - Lifetime EP0340551B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3815247 1988-05-05
DE19883815247 DE3815247A1 (de) 1988-05-05 1988-05-05 Wagenheber
DE3841014 1988-12-06
DE3841014 1988-12-06

Publications (2)

Publication Number Publication Date
EP0340551A1 EP0340551A1 (fr) 1989-11-08
EP0340551B1 true EP0340551B1 (fr) 1992-03-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107144A Expired - Lifetime EP0340551B1 (fr) 1988-05-05 1989-04-20 Cric

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EP (1) EP0340551B1 (fr)
DE (1) DE58900895D1 (fr)
ES (2) ES2030552T3 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114129C2 (de) * 1991-04-30 1993-11-11 Bilstein August Gmbh Co Kg Wagenheber
ES1019241Y (es) * 1991-11-12 1993-01-16 T U B, S.A. Gato mecanico elevador de automoviles/
GB9203612D0 (en) * 1992-02-20 1992-04-08 Metallifacture Ltd Vehicle jack
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Also Published As

Publication number Publication date
ES1010176U (es) 1989-12-01
ES2030552T3 (es) 1992-11-01
EP0340551A1 (fr) 1989-11-08
ES1010176Y (es) 1991-08-01
DE58900895D1 (de) 1992-04-09

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