EP0473238B1 - Bras porteur d'un dispositif de levage de véhicule - Google Patents

Bras porteur d'un dispositif de levage de véhicule Download PDF

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Publication number
EP0473238B1
EP0473238B1 EP91202201A EP91202201A EP0473238B1 EP 0473238 B1 EP0473238 B1 EP 0473238B1 EP 91202201 A EP91202201 A EP 91202201A EP 91202201 A EP91202201 A EP 91202201A EP 0473238 B1 EP0473238 B1 EP 0473238B1
Authority
EP
European Patent Office
Prior art keywords
lifting device
carriage
extension piece
carrier
arm portion
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
EP91202201A
Other languages
German (de)
English (en)
Other versions
EP0473238A3 (en
EP0473238A2 (fr
Inventor
Jan Willem Fijnvandraat
Jan Berends
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.)
Stertil BV
Original Assignee
Stertil BV
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 Stertil BV filed Critical Stertil BV
Publication of EP0473238A2 publication Critical patent/EP0473238A2/fr
Publication of EP0473238A3 publication Critical patent/EP0473238A3/en
Application granted granted Critical
Publication of EP0473238B1 publication Critical patent/EP0473238B1/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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
    • B66F7/04—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars hydraulically or pneumatically operated

Definitions

  • the invention relates to a vehicle lifting device comprising at least one column, with a vertically movable carriage to which bearing arms for supporting a vehicle are connected and drive means for moving the carriage upward, wherein at least one of the bearing arms of the carriage comprises a base arm pivotally connected to the carriage and having a telescopically extending arm portion which comprises on its free end a carrier formed by a horizontal bearing platform with a downward protruding screw body received in a screw-threaded hole of the arm portion.
  • Such lifting devices are generally known. These can be embodied as a one- or two-column lifting device having fixed columns placed at the sides or as a jack lifter with one telescopically extending column.
  • the movement possibilities of the bearing arms namely pivoting, sliding out and the possibility of screwing the carrier up or downward, are required in order to accurately position the bearing platform of the carrier in a desired position under a support of the vehicle for lifting.
  • the lifting device can be set into operation and the vehicle safely lifted.
  • the extending arm portion is a steel rod.
  • the threaded hole into which engages the screw body of the carrier.
  • the bottom end of the screw body here protrudes beyond the hole on the underside.
  • This protruding screw body portion forms a safety risk.
  • the lifting device In the raised situation of the lifting device it is located at the head height of persons working beneath the raised vehicle. They can easily collide with the screw body with all the danger of head injuries that this implies.
  • the invention has for its object to provide a vehicle lifting device of the type described in the preamble which does not have this drawback and is therefore safer to use.
  • the extending arm portion comprises on its free end a mould-formed extension piece in which the threaded hole receiving the carrier is formed and which comprises a protective cap extending downward around the elongation of the threaded hole and enclosing the bottom end of the screw body. Direct contact with the screw body of the carrier is prevented by the protective cap.
  • the mould-formed extension piece it is possible in economic manner to use large rounded radii at the location of the end of the bearing arm, whereby the danger of injury through collision is obviated or at least very greatly limited.
  • a favourable embodiment is characterized in claim 2.
  • the mould required for manufacturing the extension piece can hereby be embodied more simply and thus more cheaply, while the bottom end of the screw body is moreover accessible when the cover is removed, which is favourable for assembly, and particularly for arranging of a locking ring thereon.
  • the cover is preferably made of a soft plastic.
  • the extension piece is manufactured from a high-grade plastic. It has been found that in a design with a relatively large volume, which to obtain the above mentioned large rounded radii is already per se desirable, it is possible to fulfil all strength requirements with modern high-grade plastics.
  • the advantage of using plastic is of course a comparatively low cost price of the mould-formed extension piece.
  • the use of plastic moreover allows a great freedom of design, whereby an attractive finish and a robust appearance of the bearing arms can be obtained.
  • a very suitable plastic is a polyamide or polyarylamide with glass fibre filling. These materials have properties suitable for the intended application.
  • the extending arm portion is a hollow profile and the extension piece comprises a connecting protrusion fitting into the hollow profile.
  • the extending arm portion can simply be sawn from a greater length and is therefore relatively inexpensive.
  • the means necessary to obtain a good fixing of the extension piece to the hollow profile can be realized in simple manner on account of the great freedom in the design of the extension piece.
  • the step of claim 9 is preferably applied.
  • the large diameter of the screw thread contributes to the robustness of the construction and, when a pitch of the trapezium screw thread is selected that is normal at the said diameter, the advantage is furthermore achieved that a considerable height adjustment of the carrier is already obtained with a limited rotation, so that setting of the carrier to the desired height can take place very rapidly.
  • the vehicle lifting device 1 according to the invention shown in fig. 1 comprises two hollow columns 2 of sturdy steel plate, which have a substantially C-profile as shown particularly in fig. 2. Each column 2 thus has a channel 4 on one side.
  • Each column 2 is fixedly welded onto a base plate 11 which is anchored in the ground using bolts 12.
  • each hollow column 2 Received into each hollow column 2 is a vertically movable carriage 3 which is provided at its bottom end and top end with guide wheels 5 and 6 respectively.
  • the basic body of the carriage 3 consists of a U-profile. The construction is such that the body of the U-profile of the carriage 3 lies in the channel 4 of the column 2 such that it lies in one plane with the profile parts of the column 2 adjoining the channel 4.
  • each carriage 3 On the bottom end each carriage 3 bears a support construction 7 which protrudes outside the column 2 and to which two bearing arms 8 are pivotally mounted. Integrated into the swivel bearings 10 is an arresting mechanism which can lock the relevant arm 8 in a chosen swivel position. Situated on the end of an extending portion of each arm 8 further shown in fig. 3 is a carrier 9, the top surface of which can grip a support on the bottom of a vehicle for raising. To lift a vehicle the arms 8 are swivelled into such a position and extended so far until all four carriers 9 of the lifting device 1 are situated under a relevant support of the vehicle so that the vehicle can be lifted by the simultaneous movement of the two carriages 3 in both columns 2.
  • the lifting device 1 For synchronous upward movement of the carriages 3 the lifting device 1 is provided with drive means.
  • these drive means comprise a hydraulic jack 14 mounted in the left-hand column 2 in fig. 1.
  • the cylinder 15 of this jack 14 is fixedly connected to the carriage 3 and the piston rod 16 is fixedly connected at its top end to the column 2.
  • the piston rod 16 has a central bore 36 to the outer end of which is connected a hydraulic oil feed 17.
  • hydraulic oil under pressure is pressed via the feed 17 and the bore 36 above the piston into the cylinder 14 whereby the cylinder 14 and therefore the carriage 3 are moved upward.
  • This chain transmission comprises a chain 19 which is fixedly mounted on a support 18 forming an entity with the carriage 3.
  • the chain 19 extends downward from this support 18 and runs around a chain wheel 20 that is rotatable about a shaft fixedly connected to the column 2.
  • the chain From the chain wheel 20 the chain extends upward via a chain wheel 21 at the top of the left-hand column 2 through a cross beam 13 mutually joining both columns 2 at their top ends, over a chain wheel 22 at the top of the right-hand column 2 to the right-hand carriage 3.
  • the end of the chain 19 is fixedly connected to the carriage 3 by means of a safety construction 23 not further shown in fig. 2.
  • This safety construction 23 is embodied such that if the chain 19 should break the rod 24 mounted fixedly in the column 2 is gripped immediately, thus preventing the right-hand carriage 3 from falling downward.
  • a safety device which, during normal use, also prevents undesired downward movement of the carriages 3, for example as a result of a leakage in the hydraulic jack 14.
  • This safety device comprises a hole strip 27 mounted fixedly in the left-hand column with which a ratchet 28 co-acts that is connected pivotally to the left-hand carriage 3 by means of a shaft 29.
  • the ratchet 28 is embodied such that it allows an upward movement but in the case of downward movement grips into a hole in the hole strip 27.
  • the ratchet 28 can be rotated round the shaft 29 in counter-clockwise direction as seen in fig. 2 by an electromagnet 30.
  • This electromagnet 30 is activated when the control device, which is not described further here, receives a command to lower the lifting device.
  • the described chain transmission ensures that both carriages 3 run synchronously unless, as described, the chain breaks.
  • the right-hand carriage 3 is then instantaneously locked on the rod 24.
  • Chain breakage is moreover detected by a switch means, not further described here, and this switch means generates a signal to the control device whereby the lifting or lowering movement is immediately ended.
  • a switch means not further described here, and this switch means generates a signal to the control device whereby the lifting or lowering movement is immediately ended.
  • the mentioned switch means likewise detects when the chain 19 becomes slack. This can occur when during lowering the right-hand carriage is obstructed by a support or the like accidentally left behind under the device. The lowering movement will in this case also be switched off immediately.
  • These safety devices are otherwise generally per se known.
  • Another per se known safety device is a sensor wire 37 arranged directly beneath the cross beam 13 which activates a switch as soon as the wire 37 is pressed upward, for example by the roof of a vehicle. To prevent damage through contact with the cross beam 13 the lifting movement is then immediately switched off.
  • the bearing arm 8 comprises a hollow base arm 40 pivotally connected to the support 7 of the carriage and a telescopically extending arm portion 41.
  • the extending arm portion 41 bears on its end towards the carriage a stop 42 which can co-act with a stop 43 against the top face of the hollow base arm 40 in order to prevent the sliding part 41 being pushed too far outward.
  • the sliding portion 41 is pushed into the base arm 40 from the left as seen in fig. 3 before the carrying construction 10 is mounted.
  • a mould-formed extension piece 44 Arranged on the free end of the sliding arm portion 41 is a mould-formed extension piece 44.
  • This extension piece 44 has a connecting protrusion 45 which can be pushed into the sliding portion 41.
  • a threaded hole 49 is formed in the extension piece 44 into which engages the screw body 48 of a carrier 9.
  • This carrier 9 comprises in addition to the screw body 48 a bearing platform 46 provided with a covering 47 of rubbery material such as soft polyurethane.
  • the bearing platform 46 is positioned under a support on the bottom of the vehicle in order to lift up the vehicle.
  • the bearing platform 46 can be herein adjusted to a suitable height by rotating the carrier 9.
  • the screw body 48 of carrier 9 has a locking spring 50 which prevents it being possible to entirely unscrew the carrier 9 from the threaded hole 49.
  • the extension piece 44 comprises a protective cap extending downward around the elongation of the threaded hole 49.
  • This protective cap is formed by a sleeve 51 forming an entity with the extension piece 44 and a cover pushed thereon at the bottom end.
  • the protective cap formed by the sleeve 51 and the cover 52 encloses the bottom end of the screw body 48 so that a user cannot collide with it.
  • extension piece 44 is mould-formed there is a large degree of freedom of design. It is hereby possible in particular to employ large rounded radii in economic manner whereby the danger of injury through collision is greatly limited or even eliminated.
  • the cover 52 can, if desired, be manufactured from a soft plastic, likewise to eliminate the danger of injury through collision.
  • extension piece 44 as well as the carrier 9 are formed in this embodiment in a mould from a polyamide or polyarylamide with glass fibre filling. Through the use of this high-grade plastic the extension piece 44 and the carrier 9 obtain mechanical properties as desired for the intended application.
  • the screw body 48 of carrier 9 has a large diameter.
  • a diameter in the order of magnitude of 50 mm is used.
  • the large diameter with correspondingly large pitch of the screw thread moreover has the consequence that a considerable height change of the bearing platform 46 already occurs with only a small rotation of the carrier 9.
  • the carrier 9 can hereby be set very rapidly to the desired height.
  • the extension piece 44 is mounted in the sliding arm portion 41 by means of a snap-in connection.
  • the fastening protrusion 45 comprises in its lower wall a lip 55 which carries a chamfered cam 53.
  • a hole 54 is formed in the sliding arm portion 41.
  • extension piece 44 As noted earlier, the freedom of design is very considerable because the extension piece is mould-formed. As can be seen in the figures, a robust and attractive appearance is already obtained owing to the large rounded radii used, particularly the large diameter of the sleeve 51, and owing to the large diameter of the screw body 48.
  • ribs 56 are arranged on the side faces of the extension piece which serve on the one hand as embellishment while the end faces of which moreover serve as stop surfaces lying against the end of the sliding arm 41.
  • the sliding arm portion 41 hereby need have no further provisions for fixing of the extension piece 44 and is very simply manufactured by sawing a suitable piece from a profile length. As can be seen in fig. 3, the front and rear ends slant at the same angle so that one saw-cut can suffice per sliding arm portion 41.
  • the extension piece can be embodied for instance as capping piece as well as extension piece as shown.
  • the screw body can take a multiple, for instance double, form, so that it is telescopically unscrewable and enables a greater height adjustment.
  • a reinforcement of for instance perforated sheet steel can be taken up. In case of possible molding faults this reinforcement keeps the extension piece together when breakage might occur, so that in that case nevertheless a sufficiency safety is guaranteed.
  • the lifting device according to the invention therefore has a number of advantages. These advantages include a greater safety during use, simpler assembly and lower manufacturing costs.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Chain Conveyers (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Jib Cranes (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Claims (9)

  1. Dispositif de levage de véhicule comprenant au moins une colonne, comportant un chariot déplaçable verticalement auquel des bras de support pour porter un véhicule sont reliés et des moyens d'entraînement pour déplacer le chariot vers le haut, dans lequel au moins un des bras de support du chariot comprend un bras formant base relié de façon pivotante au chariot et comportant une partie de bras étendue de façon télescopique qui comprend à son extrémité libre un porteur formé par une plateforme de support horizontale munie d'un corps de vis faisant saillie vers le bas reçu dans un trou fileté de vis de la partie de bras, caractérisé en ce que la partie de bras étendue comprend à son extrémité libre une pièce de prolongement formée par moulage dans laquelle le trou fileté destiné à recevoir le porteur est formé et qui comprend un capuchon de protection s'étendant vers le bas autour du prolongement du trou taraudé et comportant l'extrémité formant fond du corps de vis.
  2. Dispositif de levage selon la revendication 1, caractérisé en ce que le capuchon de protection est formé par un manchon formant partie de la pièce de prolongement et un couvercle agencé à l'extrémité du fond du manchon.
  3. Dispositif de levage selon la revendication 2, caractérisé en ce que le couvercle est fabriqué en plastique mou.
  4. Dispositif de levage selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce de prolongement est fabriquée en plastique de qualité élevée.
  5. Dispositif de levage selon l'une quelconque des revendications précédentes, caractérisé en ce que le porteur est fabriqué en plastique de qualité élevée et la plateforme de support comprend un revêtement en matériau caoutchouteux.
  6. Dispositif de levage selon la revendication 4 ou 5, caractérisé en ce que le plastique de qualité élevée est un polyamide ou un polyarylamide comportant un remplissage de fibres de verre.
  7. Dispositif de levage selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie de bras étendue est un profil creux et la pièce de prolongement comprend une saillie de liaison ajustée dans le profil creux.
  8. Dispositif de levage selon la revendication 7, caractérisé en ce que la saillie de liaison est verrouillée dans le profil creux au moyen d'une liaison par encliquetage, dans lequel la liaison par encliquetage comprend une lèvre élastique munie d'une came saillante sur la saillie de liaison et un trou ménagé dans le profil creux accessible de l'extérieur pour recevoir la came.
  9. Dispositif de levage selon l'une quelconque des revendications 4-8, caractérisé en ce que le corps de vis et le trou taraudé sont munis d'un filetage de vis trapézoïdal avec un diamètre effectif dans l'ordre de grandeur de 50 millimètres.
EP91202201A 1990-08-29 1991-08-29 Bras porteur d'un dispositif de levage de véhicule Expired - Lifetime EP0473238B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9001900A NL9001900A (nl) 1990-08-29 1990-08-29 Drager voor een auto-hefbrug.
NL9001900 1990-08-29

Publications (3)

Publication Number Publication Date
EP0473238A2 EP0473238A2 (fr) 1992-03-04
EP0473238A3 EP0473238A3 (en) 1992-03-25
EP0473238B1 true EP0473238B1 (fr) 1995-03-01

Family

ID=19857597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91202201A Expired - Lifetime EP0473238B1 (fr) 1990-08-29 1991-08-29 Bras porteur d'un dispositif de levage de véhicule

Country Status (5)

Country Link
EP (1) EP0473238B1 (fr)
AT (1) ATE119132T1 (fr)
DE (1) DE69107734T2 (fr)
ES (1) ES2068487T3 (fr)
NL (1) NL9001900A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016123383A1 (de) * 2016-12-02 2018-06-07 Johannes Baringer Hubvorrichtung
CN109502505A (zh) * 2017-12-15 2019-03-22 蔚来汽车有限公司 车辆提升机构及自动换电系统
DE102020105446A1 (de) 2020-03-02 2021-09-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Adapter für eine Hebebühne
DE102022204477A1 (de) 2022-05-06 2023-11-09 Maha Maschinenbau Haldenwang Gmbh & Co. Kg Aufnahmevorrichtung zum Aufnehmen eines Fahrzeuges und Hubvorrichtung
CN115818498B (zh) * 2022-11-24 2023-09-05 苏州艾沃意特汽车设备有限公司 非对称双立柱举升机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2070516A5 (fr) * 1969-12-08 1971-09-10 Fogautolube Sa
DE2046460A1 (de) * 1970-09-21 1972-04-13 Maschinenfabrik J.A. Becker & Söhne Neckarsulm, 7101 Erlenbach Verstellbarer Tragteller auf Teleskopschwenkarmen von Hebebühnen aller Art
GB1403074A (en) * 1972-11-29 1975-08-13 Gkn Transmissions Ltd Lifting apparatus
AU1571088A (en) * 1987-04-02 1988-11-02 Man Ho Lee Lift

Also Published As

Publication number Publication date
ES2068487T3 (es) 1995-04-16
DE69107734T2 (de) 1995-06-29
EP0473238A3 (en) 1992-03-25
DE69107734D1 (de) 1995-04-06
NL9001900A (nl) 1992-03-16
EP0473238A2 (fr) 1992-03-04
ATE119132T1 (de) 1995-03-15

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