EP0472952B1 - Cric pour véhicule - Google Patents

Cric pour véhicule Download PDF

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Publication number
EP0472952B1
EP0472952B1 EP91113063A EP91113063A EP0472952B1 EP 0472952 B1 EP0472952 B1 EP 0472952B1 EP 91113063 A EP91113063 A EP 91113063A EP 91113063 A EP91113063 A EP 91113063A EP 0472952 B1 EP0472952 B1 EP 0472952B1
Authority
EP
European Patent Office
Prior art keywords
crank handle
handle arm
arm
crank
jack
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
EP91113063A
Other languages
German (de)
English (en)
Other versions
EP0472952A1 (fr
Inventor
Dieter Dipl.-Ing. Weisser
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
Application filed by EA Storz GmbH and Co KG filed Critical EA Storz GmbH and Co KG
Publication of EP0472952A1 publication Critical patent/EP0472952A1/fr
Application granted granted Critical
Publication of EP0472952B1 publication Critical patent/EP0472952B1/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 according to the preamble of claim 1.
  • a jack is known from EP-A-0 321 164.
  • FIG EP-0 232 836-A1 of the applicant A similar jack of this type, in which, however, the effective length of the crank arm cannot be changed, is shown in FIG EP-0 232 836-A1 of the applicant is known.
  • the upper threaded spindle bearing is designed as a nut pivotably held in the pillar; in principle, it is also possible to keep the threaded spindle axially immovable in the upper bearing and the mother causing the lifting arm to be pivotally mounted on the supporting arm.
  • a rigid crank arm is to be understood as one which, like, for example, the crank arm of the jack according to DE-GM 8701736.9, cannot bend: in jacks of the type to be improved by the present invention, the crank arm is therefore stiff.
  • the pillar can tip over its lower support when lifting a vehicle body (it runs obliquely to the floor when the jack is attached to the vehicle body, e.g. at 45 °, and straightens up more and more while lifting the vehicle body) the jack according to EP-0 232 836-A 1,
  • the base plate is connected in an articulated manner to the lower end of the pedestal via a pin running parallel to the pivot arm pivot axis.
  • the footplate can also be designed as a so-called tilting footplate and can be firmly connected to the pillar;
  • Such tilting foot plates have an angled bottom, seen in the side view of the jack, the edge of which defines the fourth axis mentioned above (see FIG. 1 of EP-A-0 321 164).
  • jack needs as little space as possible when it is stowed away and in particular can be accommodated in such a way that it does not require any space usable for storing luggage.
  • a shortening of the pedestal leads to the need to shorten the crank arm of the crank, with which the threaded spindle is driven, because otherwise the crank can no longer be rotated through 360 ° because it hits the ground, e.g. . B. strikes the road surface; on the other hand, a shortened crank arm has the disadvantage that the forces to be exerted by an operator at the end of the crank handle become relatively high as soon as the wheels on the side of the vehicle which is being lifted have lifted off the ground.
  • crank as shown in DE-GM 8701736.9, ie with a so-called wobble crank, which not only has a joint between its end area on the jack side, but also another joint approximately in the middle of the crank arm, so that the latter can be bent.
  • a crank is not only relatively expensive to manufacture, it also makes it difficult to operate the jack, especially for inexperienced people - but these are the rule nowadays after punctures occur extremely rarely.
  • the actual crank arm forms, together with a bracket attached to the latter, a slot (or a kind of elongated hole), the longitudinal axis of which runs parallel to the longitudinal direction of the actual crank arm and which is penetrated by a head piece attached to the rear end of the threaded spindle.
  • This head piece forms an annular groove in which the crank is held captively on the threaded spindle, and the annular groove defines a pivot axis running transversely to the threaded spindle, about which the crank arm can be pivoted.
  • the effective length of the crank arm can only be changed in this known jack if the actual crank arm lies exactly in a plane that is perpendicular to that of the head piece or its annular groove defined and mentioned above pivot axis, a circumstance that at least complicates the operation of this known jack by inexperienced people in the handling of jacks. Dirt or the like can also get stuck in the completely open slot of the crank, so that the effective length of the crank arm can then no longer be changed.
  • the invention was based on the object of creating a jack with the features of the preamble of claim 1, which on the one hand can be used easily and reliably even by inexperienced people and on the other hand with the same stroke as the known jack according to EP-A-0 232 836 have a shorter column than the latter and can therefore be accommodated in the rim of the spare wheel arranged in the trunk.
  • the crank arm has a telescope, consisting e.g. from two tubes or a tube and a rod, which are guided longitudinally displaceably to one another with non-round cross-sectional areas in order to keep the orientation of the handle end of the crank securely constant when the jack is actuated, namely in such a way that the handle end points away from the actual jack.
  • stop elements can pose a risk of injury to the hand of the person operating the jack, it is advisable to use the stop elements to be provided on the side of the crank arm facing away from the handle end.
  • stop elements are designed as anti-rotation elements.
  • a particularly preferred embodiment of the jack according to the invention has a sleeve fixedly attached to a first crank arm section, which extends in the longitudinal direction of the crank arm and in which a second crank arm section is guided so as to be longitudinally displaceable.
  • a sleeve fixedly attached to a first crank arm section, which extends in the longitudinal direction of the crank arm and in which a second crank arm section is guided so as to be longitudinally displaceable.
  • a particularly preferred embodiment of the jack according to the invention has spring detents at least for the two extreme working positions of the crank arm sections; if necessary, a further spring locking device can of course also be provided for a middle working position.
  • a jack in which the radial distance of the crank handle end from its jack-side axis of rotation can be changed by longitudinally displacing the crank arm, is known from DE-GM 80 24 720.
  • DE-GM 80 24 720 For one, it is in this known jack, however, by a completely different type of jack, and secondly only one position of the crank is provided and suitable as a working position.
  • this known jack namely, the support arm is displaceable in the longitudinal direction of the pedestal, and the threaded spindle arranged in the pedestal is driven by the crank via an angular gear.
  • the latter consists of two gear wheels with mutually perpendicular axes, one of which is firmly connected to the upper end of the threaded spindle and the other to a covering shell which overlaps it and which has a guide sleeve oriented radially to the axis of this gear wheel, in which the radially extending crank arm is longitudinally displaceable and rotatable about its longitudinal axis.
  • the radially inner end of the crank arm there is a wedge, for which the sleeve has a slot which is open in the direction of the gear axis, into which the wedge engages when the crank takes up its working position, in which its grip end has the greatest radial distance from the gear axis and is aligned parallel to it.
  • crank arm In order to be able to stow away this known jack in a space-saving manner, the crank arm is pushed in the direction of the gearwheel axis until the wedge has left the slot in the sleeve of the cover shell, whereupon the crank can be rotated through 90 ° about the longitudinal axis of the crank arm to achieve that the crank handle no longer protrudes from the pillar. In this known jack, the crank can no longer be operated when the crank arm is "shortened".
  • the jack shown in Fig. 1 has a pedestal 10 which forms a U-profile with two side walls 12 and a back 14. At the lower end of the pillar, the side walls 12 have edges 12a, the shape of which corresponds to an oblique, straight line starting from the back 14 and a circular arc adjoining it.
  • the lower end regions of the side walls 12 are overlaid by side cheeks 16 of a base plate 18, which forms a type of shoe with a flat base plate 20 to which the bent sidewalls 16 are formed.
  • Two rivets 22 serve to link the base plate 18 to the pedestal 10, so that the base plate 20 can pivot about a tilt axis 24.
  • pointed projections 26 were pressed out of the bottom plate 20.
  • U-profile of the pedestal 10 engages between the side walls 12 a support arm designated as a whole with 38, which is also formed by a U-profile, the two side walls 40 and has a back 42.
  • the side walls 40 of the support arm bear against the column side walls 12 and are connected to the latter by two rivets 44 in an articulated manner.
  • the structure of the support arm and the other parts of the jack except the crank design according to the invention - are drawn and described in detail in German Offenlegungsschriften 29 36 002 and 30 37 934, so that it is sufficient for the following to outline this structure only briefly.
  • a threaded spindle 56 passes through the load carrier 50 and has at its left end according to FIG. 1 an integrally formed head 58, between which and the load carrier 50 an axial bearing 60 is arranged.
  • the threaded spindle 56 thus also engages between the support arm side walls 40 and it runs to the upper end of the pedestal 10, where it runs in a nut 62 which is held rotatably about a transverse axis 64 between the side walls 12 of the pedestal 10.
  • the side pillar side walls 12 also have recesses 66 which are partially circular and open to the edge and into which the nut engages with axially shaped stub axles.
  • the right end of the threaded spindle 56 according to FIG. 1 has a transverse hole 70 which is penetrated by an upper end region of a crank 74 which serves as a pivot pin 72 and runs perpendicular to the plane of the drawing in FIG. 1; so that the latter is held captive on the jack, the end of the pivot pin 72, not shown, facing away from the viewer of FIG. 1 has a molded head, also not shown, which prevents the pivot pin 72 from sliding out of the transverse hole 70.
  • the crank 74 consists of the pivot pin 72, an extendable crank arm 76 extending perpendicular thereto and a handle end 78 extending perpendicular to the crank arm 76, but also perpendicular to the pivot pin 72, on which a handle 80 is rotatably mounted about the axis of the handle end 78 .
  • the load carrier 50 should be briefly To be received. This has an approximately groove-shaped recess 82, the axis of which runs perpendicular to the plane of the drawing in FIG. 1.
  • a web-shaped area 84 of the vehicle body which is usually the so-called sill seam web, engages in this recess when the jack is attached.
  • the adjacent areas of the body sill 86 then lie on top of the load carrier 50, either on both sides of the recess 82 or only on one side of this recess.
  • the crank arm 76 has a first and a second crank arm section 76a and 76b, the parts 72, 76a, 76b and 78 being able to be produced in a conventional manner from round material by bending such round material twice at right angles and then to produce the two crank arm sections between them is cut through.
  • a sleeve 100 is then attached to the first crank arm portion 76a, e.g. B. with the aid of a rivet 102. This sleeve is cut on its side facing the pedestal according to FIG. 1 between its ends over part of its length, as can be seen in FIG. 2, so as to produce a longitudinal opening 104.
  • a plate 106 slides, which at the threaded spindle end of the second crank arm section 76b z. B. was fixed by spot welding and also cooperates with the stop-forming transverse edges 104b and 104c of the longitudinal opening 104. In this way it is achieved according to the invention that the second crank arm section 76b can be displaced in the longitudinal direction of the crank arm 76 over the length of the longitudinal opening 104, minus the length of the plate 106, relative to the first crank arm section 76a.
  • crank 74 can freely rotate without contact with the ground and without the risk of injury to an operator's hand comprising the crank handle 80, the crank arm 76 is shortened for cranking in the attachment position, as is the case was shown in Fig. 1 for the attachment position.
  • the plate 106 lies against the transverse edge 104b.
  • crank arm 76 can be extended to cope with the larger torque then required on the threaded spindle by the second Pulling crank arm portion 76b out of sleeve 100 as much as possible; then the plate 106 rests on the lower transverse edge 104c, as was shown in FIG. 1 for the position of the jack drawn with solid lines.
  • FIGS. 3 and 4 show a second embodiment of the crank according to the invention, namely a crank 74 ', which differs from the embodiment according to FIGS. 1 and 2 only in that instead of the plate 106 the inner end region of the second crank arm section 76b' was slightly bent and that locking means were provided for the two extreme positions of the second crank arm section. Therefore, only those elements of the second embodiment of the crank in which the second embodiment differs from the first embodiment are described below.
  • the same reference numerals as in FIGS. 1 and 2 have been used for the remaining elements of this second embodiment shown in FIGS. 3 and 4.
  • the sleeve 100 of the second embodiment differs from that of the first embodiment only by an additional design feature, namely by a transverse slot 104d, which is arranged at a distance from and parallel to the transverse edge 104c on the side of the sleeve 100 facing the column 10 and into which a straight spring section 110a 'of a wire spring 110' engages around the sleeve 100.
  • the second crank arm section 76b ' is provided with two annular grooves 112' and 114 'into which the straight spring section 110a' can snap.
  • the upper end of the second crank arm section 76b ' is bent approximately at a right angle and thus forms a projection 112' which projects into the longitudinal opening 104 of the sleeve 100.
  • the projection 116 ' performs two functions according to the invention: on the one hand it limits the two extreme positions of the second crank arm section 76b' by interacting with the two stops or transverse edges 104b and 104c, and on the other hand it prevents the two crank arm sections from rotating relative to one another and thus ensures the correct position of the handle 80 - in the first embodiment, as already mentioned, the plate 106 slides on the longitudinal edges 104a, in the second embodiment the projection 116 'is guided between the two longitudinal edges 104a.
  • the locking devices formed by the two ring grooves 112 'and 114' and the wire spring 110 ' are effective in the two extreme positions of the second crank arm section 76b', but they also allow any intermediate position.
  • the two locking devices will Cranking is easier because the second crank arm section cannot move unintentionally during cranking.

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)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Claims (7)

  1. Cric pour véhicule comprenant une colonne (10), à l'extrémité inférieure de laquelle est agencée une semelle (18) servant à donner appui au cric sur le sol, et dans la région supérieure de laquelle est agencée une vis (56) montée mobile en rotation autour de son axe longitudinal et en pivotement autour d'un axe transversal (64), et, sur laquelle un bras porteur (38) qui peut être relevé au moyen de la vis est monté pivotant entre le palier de la vis et la semelle, autour d'un deuxième axe transversal (34) parallèle au premier axe transversal (64) précité, ainsi qu'un support de charge (50) qui peut être appliqué contre la carrosserie du véhicule, et qui est monté sur le bras porteur (38) dans la région de l'extrémité libre de celui-ci, et qu'une manivelle (74 ; 74') montée imperdable sur la vis (56), et qui est montée pivotante, par une première région terminale (76a) côté vis à l'extrémité de la vis qui est éloignée du bras porteur, pour pivoter autour d'un troisième axe d'articulation (72) qui s'étend transversalement à l'axe de la vis, et qui présente, entre sa première région terminale (76a) et une extrémité de poignée (78), un bras de manivelle rigide allongé (76), l'extrémité de poignée (78) s'étendant transversalement au bras de manivelle (76) et transversalement au troisième axe d'articulation (72), la manivelle (74 ; 74') étant construite de telle manière que, pour obtenir au moins deux positions de travail radiales de l'extrémité de poignée (78) de la manivelle - rapportées au troisième axe d'articulation (72) - la distance de l'extrémité de poignée (78) au troisième axe d'articulation (72) et, par conséquent, la longueur effective du bras de manivelle (76) étant variable, et dans lequel, lorsqu'on soulève une carrosserie de véhicule, la colonne (10) peut s'incliner autour d'un quatrième axe (24) situé dans la région de la semelle (18), et qui s'étend de même parallèlement au premier axe transversal (64), caractérisé en ce que le bras de manivelle (76) présente au moins deux segments de bras (76a, 76b ; 76a, 76b') pouvant coulisser l'un par rapport à l'autre dans la direction longitudinale du bras de manivelle, qui sont guidés à coulisse l'un par rapport à l'autre et verrouillés à l'encontre de la rotation l'un par rapport à l'autre autour de l'axe longitudinal du bras de manivelle, ainsi que des éléments de butée (104b, 104c, 106 ; 104b, 104c, 112') servant à limiter la variation de longueur du bras de manivelle.
  2. Cric selon la revendication 1, caractérisé en ce que le bras de manivelle (76) présente un emmanchement télescopique (76a, 100, 76b).
  3. Cric selon la revendication 1 ou 2, caractérisé en ce que les éléments de butée (104b, 104c, 106 ; 104b, 104c, 116') sont situés sur le côté du bras de manivelle (6) qui est à l'opposé de l'extrémité de poignée (78).
  4. Cric selon une ou plusieurs des revendications 1 à 3, caractérisé en ce que les éléments de butée (104, 106 ; 104, 116') sont constitués par des éléments de blocage de la rotation.
  5. Cric selon une ou plusieurs des revendications 1 à 4, caractérisé en ce qu'un premier segment (76a) du bras de manivelle (76) est muni d'un manchon (100) fixé rigidement à ce segment et qui s'étend dans la direction longitudinale du bras de manivelle, et dans lequel un deuxième segment (76b ; 76b') du bras de manivelle est guidé mobile en translation longitudinale.
  6. Cric selon les revendications 4 et 5, caractérisé en ce que le manchon (100) présente une rainure longitudinale intérieure ou une fente longitudinale (104) et le deuxième segment (76b ; 76b') du bras de manivelle présente une saillie (106 : 112') qui s'engage dans cette rainure ou cette fente.
  7. Cric selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que des dispositifs de verrouillage élastiques (110', 112', 114') sont prévus au moins pour les deux positions de travail extrêmes des segments (76a, 76b ; 76a, 76') du bras de manivelle.
EP91113063A 1990-08-04 1991-08-02 Cric pour véhicule Expired - Lifetime EP0472952B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4024809 1990-08-04
DE4024809A DE4024809A1 (de) 1990-08-04 1990-08-04 Wagenheber

Publications (2)

Publication Number Publication Date
EP0472952A1 EP0472952A1 (fr) 1992-03-04
EP0472952B1 true EP0472952B1 (fr) 1995-11-29

Family

ID=6411662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113063A Expired - Lifetime EP0472952B1 (fr) 1990-08-04 1991-08-02 Cric pour véhicule

Country Status (3)

Country Link
EP (1) EP0472952B1 (fr)
DE (2) DE4024809A1 (fr)
ES (1) ES2080864T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4200391C2 (de) * 1992-01-10 1994-07-07 Panne Gmbh & Co Kg Grundstueck Gelenkwagenheber
CN108974152B (zh) * 2018-09-18 2024-01-12 徐州重型机械有限公司 一种备胎拆装装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR506879A (fr) * 1919-12-02 1920-08-31 Leflaive & Cie Clé de manoeuvre pour crics
FR533844A (fr) * 1921-04-06 1922-03-11 Clef pliante pour cric
US1558114A (en) * 1925-02-11 1925-10-20 John A Morrison Telescoping handle for lifting jacks
US1612446A (en) * 1925-06-12 1926-12-28 Nils G Larson Jack handle
US2574689A (en) * 1949-06-10 1951-11-13 Christ Alfred William Winding crank for cameras
FR2473657A1 (fr) * 1979-12-05 1981-07-17 Slyper Jean Manivelle extensible a verrouillage dans plusieurs longueurs d'utilisation
DE3037934A1 (de) * 1980-10-08 1982-05-13 E.A. Storz Gmbh & Co Kg, 7200 Tuttlingen Wagenheber
US4586696A (en) * 1985-10-25 1986-05-06 Chrysler Corporation Vehicle lifting jack with integral stowable crank handle
DE3603311A1 (de) * 1986-02-04 1987-08-06 Storz E A Kg Spindelwagenheber
DE8701736U1 (fr) * 1987-02-05 1987-04-09 August Bilstein Gmbh & Co Kg, 5828 Ennepetal, De
GB2213783A (en) * 1987-12-17 1989-08-23 Metallifacture Ltd Adjustable length hand crank for jack

Also Published As

Publication number Publication date
ES2080864T3 (es) 1996-02-16
EP0472952A1 (fr) 1992-03-04
DE4024809A1 (de) 1992-02-06
DE59106976D1 (de) 1996-01-11

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