EP0503290A1 - Wagenheber - Google Patents

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Publication number
EP0503290A1
EP0503290A1 EP92102264A EP92102264A EP0503290A1 EP 0503290 A1 EP0503290 A1 EP 0503290A1 EP 92102264 A EP92102264 A EP 92102264A EP 92102264 A EP92102264 A EP 92102264A EP 0503290 A1 EP0503290 A1 EP 0503290A1
Authority
EP
European Patent Office
Prior art keywords
parallelogram
stirrup
apex
spindle
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.)
Granted
Application number
EP92102264A
Other languages
English (en)
French (fr)
Other versions
EP0503290B1 (de
Inventor
S.A. Tub
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.)
Tub SA
Original Assignee
S.A. Tub
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 S.A. Tub filed Critical S.A. Tub
Publication of EP0503290A1 publication Critical patent/EP0503290A1/de
Application granted granted Critical
Publication of EP0503290B1 publication Critical patent/EP0503290B1/de
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 present invention relates to a vehicle lifting jack for raising and lowering a vehicle for changing a wheel of which the tire has become unusable.
  • Lifting jacks which are Y-shaped comprising a column with a foot for resting on the ground.
  • a lifting arm with a U-shaped stirrup or end support is hinged to support the lifted vehicle.
  • the vehicle is provided with corresponding flanges on the underside of the bodywork, which may partly come to rest in a channel of the stirrup.
  • the column and the lifting arm of this type of lifting jack are associated with one another by way of a spindle screwed in a nut pivotably connected to the top of the column, while one end of the spindle is rotatably and pivotably connected to the end of the arm and the other end of the spindle has attached thereto a cranked handle, normally pivotably attached thereto, to operate the jack for lifting or lowering the vehicle.
  • a cranked handle normally pivotably attached thereto
  • the base of the column of the known types of lifting jacks which rests on the ground, moves or rocks relative thereto with the relative tilt of the column varying, since said base is fixedly attached to the column.
  • the stability of the lifting jack is negatively effected, since the initial positioning of the jack to achieve a stable lifting motion and finally the positioning of the vehicle are critical.
  • leaf spring or articulated lifting jacks which are formed by arms hingedly connected together in a parallelogram form.
  • the spindle is located on the substantially horizontal diagonal of this parallelogram with one end of the spindle being screwed to a nut which is attached to one of the apexes of the parallelogram and with the other end thereof rotatably attached to the opposite apex of the parallelogram.
  • the spindle projects outwardly beyond one of said apexes for connection with the cranked handle.
  • This type of lifting jack has one base member pivotably attached to the lower apex of the parallelogram to support the jack on the ground and another base member at the upper apex to support the underside of the vehicle bodywork.
  • the cranked handle of this known lifting jack is located very close to the ground which makes handling difficult, both during the initial lifting and the final lowering phase of the vehicle, and may even cause injury of the hand of an user because of possible ground contact.
  • the corresponding underside of the vehicle bodywork to be lifted is provided with one or more flanges which will be inserted in a groove or a channel of the liftable stirrup, support or base member of the jack, which is V-shaped in cross section.
  • this shape of the channel-shaped stirrup of the lifting jack does not - depending on the height to which the vehicle is lifted by the user and depending on the initial positioning of the jack relative to the vehicle body as selected by the user - prevent the lower flange of the vehicle body from coming to rest against the narrowest or closest part of the stirrup groove or channel.
  • the flange of the vehicle may be deformed because of the relative rotation between this part of the vehicle and the stirrup by which it is supported, with a consequent damage to the flange itself and subsequent difficulties in lifting the vehicle on a future occasion with the same jack. Or worse, the flange may become useless or may even break.
  • a vehicle lifting jack is a new type of a lifting jack with four mutually pivotably attached arms disposed in a parallelogram form, with a spindle located on a diagonal of said parallelogram, which is preferably horizontal or approximately horizontal when the jack is in the lifted position, with one end passing through a nut pivotably attached to an apex of the parallelogram and with the other end passing through a cross member which is pivotably attached to the opposite apex of the parallelogram, one end of the spindle being terminated by a stop member which rotatably bears against the cross member, preferably through a bearing; said spindle is provided, at one of the two ends thereof, with a handle, preferably a cranked handle, or with temporary connection means for such a handle for being caused to rotate by the user; the lower rear arm of the parallelogram, which extends from the rear apex thereof, is extended below said lower apex, forming a support leg for the jack, which is pivotably connected to a floor support
  • the linking means between the stirrup and the end of the upper rear arm of the parallelogram peferably consists of respective parallel peripheral channels which are open to opposite directions. These channels are situated on the outer circular surface of the stirrup and form respective circular arcs. With these channels there are engaged respective inwardly folded flanges of the end of the upper rear arm of the parallelogram, which are disposed facing each other and forming respective circular arcs mating with the arcs of said peripheral channels.
  • the problems mentioned in connection with the known types of lifting jacks are obviated and, among others, the following advantages are provided: greater stability; lower manufacturing cost for the same height; smaller volume occupied, making storage in any part of the vehicle easier; greater lifting height, for the same dimensions in the folded position of the jack; unfolding the jack to its maximum lifting height with less turns of the cranked handle, increasing user convenience; faster lifting and lowering of the vehicle to be lifted or lowered, saving time to the user; achieving a desirable separation or spacing apart of the lower flange of the vehicle bodywork from the groove or channel wall(s) of the stirrup of the jack throughout the whole vehicle lifting or lowering operation; automatic adaptation of the stirrup to the relative movement or rotation of the vehicles underfloor with respect to the ground, without the possibility of transferring harmful torques; and the possibility of making the stirrup as long as desired with respect to the axis of rotation, without limitations in view of the specific constitution of the relative linking means between the stirrup and the end of
  • the vehicle lifting jack of the invention affords the advantages described above, apart from others which will be readily appreciated from an example of a preferred embodiment described in further detail hereinafter to facilitate the understanding of the features described, disclosing at the same time sundry details. Attached hereto are certain drawings of a preferred embodiment of such a lifting jack which is by no means a restricting example to the scope of the present invention.
  • a vehicle lifting jack is provided with four arms 1, 2, 3 and 4, pivotably connected and forming a parallelogram.
  • the lifting jack is provided with a spindle 5, schematically shown by a center line in Fig. 1 and 2, which is extended along a diagonal of said parallelogram. The angular position of this diagonal changes when the jack is operated as can easily be seen by comparing Figures 1, 2 and 3.
  • a cranked handle 6 connected inseparably and pivotably at a rear end of the spindle 5 and serving as a means by which the spindle 5 is rotated during a lifting or lowering action causing the jack to unfold or fold down, i.e. to lift or lower a stirrup 10 of the jack and the vehicle bodywork engaged therewith.
  • the spindle 5 may be rotated by other means which may have a separable attachment located between the handle 6 which is suitably shaped and the rear end of the spindle 5 to facilitate easy storage in the vehicle when the jack is not used.
  • the lower rear arm 2 of said parallelogram has a lower extension 2a serving as support leg for the jack, spacing the parallelogram apart from the floor.
  • Said extension 2a is pivotably connected to a foot 7.
  • stop means may be provided consisting of additional members or members defined by the very shape of the lower edge of the lower extension 2a, as shown in Fig. 1, 2 and 3.
  • Spring means may also be provided to retain the foot 7 in the position shown in Figure 1 when it is folded down.
  • the spring means is a wire spring attached at one end to the lower extension 2a and supported at the other end on the foot 7, having one or more turns wounded around the pivot shaft between the lower extension 2a and the foot 7.
  • the four arms 1 to 4 of the lifting jack may be formed by U-shaped sections connected by respective pivot pins or, in another embodiment, they may be formed by pairs of parallel flat bars spaced apart by respective cores acting as pivot shafts of the arms to form a parallelogram. Suited Combinations of such sections may be used in one jack and furthermore the specific configuration of said arms could be any other, depending on manufacturing needs and under consideration of the stress to which they might be exposed.
  • the foot 7 is provided with two parallel wings, such as the wing 8, to the outside of which there are, in this embodiment, pivotably connected two side members which constitute the lower rear arm 2 with its lower extension 2a.
  • each of these two side members is formed by a C-shaped section, although it may obviously be formed, as already mentioned, by any other type or form of sections and even by a single appropriate section.
  • the front end of the spindle 5 is supported by support or stop means which may consist of a bearing 9 or any other suitable means which, likewise, holds said spindle end in position and facilitates the rotation thereof relative to the front apex of the parallelogram.
  • Said spindle 5 is screwed in threaded or nut means pivotably attached to the rear apex of the parallelogram, i.e., at the upper portion of the lower rear arm 2. This means allows the spindle 5 to move relative to said rear apex of the parallelogram depending on the direction of rotation of the handle 6.
  • the relative position of the bearing 9 or the like and the nut could be reversed, i.e. the latter could be disposed at the front apex of the parallelogram and the bearing 9 at the rear apex thereof.
  • An upper rear arm 1 of the parallelogram has a short upper extension on which there is disposed the stirrup 10, which is rotatably attached to this arm 1.
  • the stirrup 10 exhibits a cross section similiar to the Greek capital letter omega laying upside down or nearly upside down with respect to the underside of a vehicle bodywork which has to be lifted or lowered. Therefore the stirrup 10 is assembled such that it is able to rotate relative to the end of the upper extension of the upper rear arm 1.
  • the axis of rotation extends in parallel to an ideal or nearly ideal transverse axis perpendicular or almost perpendicular to the longitudinal axis of the upper rear arm 1.
  • the end of the upper rear arm 1 is provided with linking means by which it is associated or attached to respective means of the stirrup 10, to allow the latter to rotate around said transverse axis, but to prevent it from moving in a transverse direction.
  • Said linking means between the stirrup 10 and the end of the upper rear arm 1 consist of respective mutually parallel and opppositely facing peripheral channels, such as the channel 11, which are located on the outer circular surface of the stirrup 10, forming respective circular arcs.
  • said channels 11 may be defined by a formed flat bar 12 firmly attached, for example by welding, to the circumference of the stirrup 10, most preferably at its central portion.
  • the bar 12 is provided with respective deviations at the parallel end edges thereof which form the channels 11.
  • the bar 12 could be replaced by two narrower, also formed bars 12 and, likewise, said channels 11 could be formed in the stirrup 10 itself by cutting and/or swaging.
  • Respective inwardly bent flanges 13 provided at the end of the upper rear arm 1 of the parallelogram are engaged with the channels 11 by insertion. Said flanges 13 are disposed facing each other and also forming circular arcs mating with the arcs of the channels 11 of the formed flat bar 12.
  • the stirrup 10 there will be freely housed a lower flange 14 provided at the corresponding underside of the vehicle bodywork (shown in part in phantom lines in Figures 2 and 3) which is reinforced in this region to withstand the mechanical stress derived from the force of the stirrup 10 to lift the vehicle.
  • the stirrup 10 rotates relative to the end of the upper rear arm 1 in a counterclockwise direction as can be seen at Fig. 2 and 3.
  • the flange 14 of the vehicle is loosely housed in the stirrup 10. Damage to the flange 14 of the vehicle is prevented and save support of the flange 14 in the stirrup 10 is maintained. Because of the design and the attachment of the stirrup 10 balance of the lifting jack is maintained throughout the complete lifting or lowering operation and, of course, in the final vehicle lifting position during exchange of a faulty wheel.
  • the spindle 5 may be provided with a stop means such as a bushing 15 to limit the maximum height position of the lifting jack and, at the same time, facilitating easy handling by eliminating possible dead points or points close thereto in the parallelogram mechanism.
  • a stop means such as a bushing 15 to limit the maximum height position of the lifting jack and, at the same time, facilitating easy handling by eliminating possible dead points or points close thereto in the parallelogram mechanism.
  • the foot 7 may also be provided with resilient blocks to improve its adherence to the floor or with lower projections in order to enhance its gripping characteristics.

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)
EP19920102264 1991-02-11 1992-02-11 Wagenheber Expired - Lifetime EP0503290B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9100394U 1991-02-11
ES19919100394U ES1016765U (es) 1991-02-11 1991-02-11 Gato para elevar vehiculos.

Publications (2)

Publication Number Publication Date
EP0503290A1 true EP0503290A1 (de) 1992-09-16
EP0503290B1 EP0503290B1 (de) 1995-10-11

Family

ID=8271235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920102264 Expired - Lifetime EP0503290B1 (de) 1991-02-11 1992-02-11 Wagenheber

Country Status (3)

Country Link
EP (1) EP0503290B1 (de)
DE (1) DE69205308T2 (de)
ES (1) ES1016765U (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620380A1 (de) * 1995-05-22 1996-12-05 Storz E A Kg Einrichtung zum Anheben eines Personenkraftfahrzeugs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109106531B (zh) * 2018-08-14 2020-11-17 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 一种多关节辅助运动床

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936002A1 (de) * 1979-09-06 1981-03-26 E.A. Storz Gmbh & Co Kg, 78532 Tuttlingen Wagenheber
DE8901680U1 (de) * 1989-02-14 1989-04-20 August Bilstein Gmbh & Co Kg, 5828 Ennepetal, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936002A1 (de) * 1979-09-06 1981-03-26 E.A. Storz Gmbh & Co Kg, 78532 Tuttlingen Wagenheber
DE8901680U1 (de) * 1989-02-14 1989-04-20 August Bilstein Gmbh & Co Kg, 5828 Ennepetal, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620380A1 (de) * 1995-05-22 1996-12-05 Storz E A Kg Einrichtung zum Anheben eines Personenkraftfahrzeugs
DE19620380C2 (de) * 1995-05-22 1999-01-21 Storz E A Kg Einrichtung zum Anheben eines Personenkraftfahrzeugs

Also Published As

Publication number Publication date
DE69205308D1 (de) 1995-11-16
ES1016765U (es) 1991-12-01
DE69205308T2 (de) 1996-03-14
EP0503290B1 (de) 1995-10-11

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