DK154486B

DK154486B - HYDRAULIC LIFT PACKAGING FOR VEHICLES.

Info

Publication number: DK154486B
Application number: DK144077A
Authority: DK
Inventors: Martti Varajaervi
Original assignee: Nummi Ab Oy
Priority date: 1976-04-02
Filing date: 1977-04-01
Publication date: 1988-11-21
Also published as: FR2346182A1; FI53419C; DK144077A; SE7703609L; SE414746B; DE2711627A1; NL184730B; FI760893A; DK154486C; BE853174A; FI53419B; DE2711627B2; FR2346182B1; NL7703336A; YU84477A; PL113787B1; PL196920A1; NL184730C

Description

Den foreliggende opfindelse angår en hydraulisk løfte¬bagsmæk til køretøjer, hvilken løftebagsmæk omfatter et tilkøretøjets undervogn fastgjort stativ, en rektangulær ramme,hvis to modstående sider danner to på afstand fra hinanden be¬liggende løftearme,og hvis mellem løftearmenes ene ende tvær¬gående side danner en i stativet lejret bæreaksel, en løfte-platform, som svingbart er lejret i den modsatte ende af løf¬tearmene, samt hydraulikcylindre til svingning af løftearmenei parallelle planer mellem en nedsænket lastestilling (I) ogen løftestilling (II) ved køretøjets lad og til svingning af løfte-piatformen til en oprejst transportstilling (III).The present invention relates to a hydraulic lifting lug for vehicles, the lifting lug comprising a vehicle undercarriage mounted frame, a rectangular frame, the two opposite sides of which form two spaced-apart lifting arms and the transverse side of the lifting arms. forms a support shaft mounted in the rack, a lifting platform pivotally mounted at the opposite end of the lifting arms, and hydraulic cylinders for pivoting the lifting arms in parallel planes between a submerged loading position (I) and lifting position (II) at the vehicle load and to swinging the lifting piat form to an upright transport position (III).

Sådanne løftebagsmække er kendt, og til sådanne løftebagsma&kekræves der foruden enkel konstruktion tillige god stabilitet,gode indstillingsegenskaber og en stor fri markhøjde.Such lifting lugs are known, and for such lifting lugs, in addition to simple construction, good stability, good adjusting properties and a large free ground height are required.

Ifølge en kendt konstruktion er begge løftearme forenetmed en i stativet lejret bæreaksel til et U-formigt stift ele¬ment. Ved en sådan konstruktion forbedres stabiliteten utvivl¬somt, men den anvendte U-form kræver enten at løftearmeneudrustes med knæled, og at løftecylindrene monteres på midtenaf bæreakslen, hvilket forlænger løfterens udstrækning i køre¬tøjets længderetning eller fomindsker den fri markhøjde, ellerat hver løftearm forsynes med sin egen løfte- og indstillings¬cylinder, hvilket kræver flere hydraulikcylindre., sædvanligvis4 stykker, til opnåelse af acceptable indstillingsegenskaber.According to a known construction, both lifting arms are joined together with a support shaft mounted in the rack for a U-shaped rigid element. In such a construction, stability undoubtedly improves, but the U-shape used either requires the lift arms to be equipped with a knee joint and the lift cylinders to be mounted on the center of the support shaft, which extends the length of the lifter in the longitudinal direction of the vehicle or decreases the front ground height of each lift arm. with its own lifting and adjusting cylinder, which requires several hydraulic cylinders, usually 4 pieces, to achieve acceptable adjustment properties.

Hensigten med den foreliggende opfindelse er at tilvejebrin¬ge en løftebagsmæk, som bedre end hidtidige konstruktionertilgodeser ovennævnte ønskede egenskaber, og dette fomål opnåsmed løftebagsmækken ifølge opfindelsen, som er kendetegnetved, at rammen er. vridningsstiv og ved, at en hydraulikcy-linder er placeret under den ene løftearm og er indrettet tilat udføre løftearmenes svingning i vertikalplanet og at enanden hydraulikcylinder er placeret under den anden løfteamog er indrettet til at udføre løfteplatformens svingning iforhold til løftearmene.The object of the present invention is to provide a lifting lug which better than the above-mentioned constructors satisfies the above-mentioned desired properties, and this object is achieved with the lifting lug of the invention, which is characterized in that the frame is. and that a hydraulic cylinder is positioned under one lifting arm and arranged to carry out the swinging of the lifting arms in the vertical plane and that another hydraulic cylinder is placed under the other lifting arm is arranged to carry out the swinging of the lifting platform in relation to the lifting arms.

I løftebagsmækken ifølge opfindelsen er løftearmene for¬enede stift på stativsiden med en bæreaksel og på løfteplat-formsiden med en støtteaksel, således at der dannes en lukketrektangulær ramme, hvorved konstruktionen bliver særdeles sta¬ bil, selvom rammen i sig selv er af relativ let konstruktion.Takket være dette er to hydrauliske cylindre tilstrækkelige,idet den ene virker som løftecylinder og den anden som indstil¬lingscylinder, og de kan placeres usymmetrisk i forhold tilrammen, f.eks. den ene på den ene side af rammen og den andenpå den anden side af rammen. Således behøver man ikke at mon¬tere nogen cylinder på midten af bæreakslen, hvilket skullemedføre formindsket fri markhøjde. Ved løftebagsmækken ifølge opfin¬delsen opnås der en stiv helhed, uden at konstruktionen behøverat blive indviklet, og dette resulterer i særdeles gode ind¬stillingsegenskaber og god stabilitet, selvom der kun ud¬nyttes to hydraulikcylindre. Således muliggøres der enbetydelig besparelse i arbejde og råmaterialer i forholdtil tidligere kendte konstruktioner.In the lifting luggage according to the invention, the lifting arms are joined rigidly on the stand side with a support shaft and on the lifting platform side with a support shaft, so that a closed rectangular frame is formed, whereby the structure becomes very stable, even though the frame itself is of relatively light construction. Due to this, two hydraulic cylinders are sufficient, one acting as a lifting cylinder and the other as an adjustment cylinder, and they can be placed asymmetrically in relation to the frame, e.g. one on one side of the frame and the other on the other side of the frame. Thus, there is no need to mount any cylinder on the center of the carrier shaft, which should result in reduced free ground height. The lifting lug according to the invention achieves a rigid assembly without the need for the construction to be complicated, and this results in extremely good adjustment properties and good stability, even if only two hydraulic cylinders are used. Thus, a considerable saving in work and raw materials is made possible in comparison with previously known constructions.

Opfindelsen forklares nærmere nedenfor under hen¬visning til medfølgende tegning, på hvilken fig. 1 skematisk viser en fordelagtig udførelsesformfor en løftebagsmask set fra bagsiden, fig. 2 viser løftebagsmækken set fra siden, ogfig. 3-5 viser rammen til løftebagsmækken set fra bagsidenresp. fra de to sider.The invention is further explained below with reference to the accompanying drawing, in which: FIG. 1 is a schematic view of an advantageous embodiment of a lifting back mask seen from the rear; FIG. Fig. 2 shows the lifting lug from side view, and Fig. 3-5 shows the frame for the lifting luggage as seen from the back. from the two sides.

Den på tegningen viste løftebagsmæk tilJ-monte-ring på et lastbillad omfatter som de vigtigste dele et tilchassisbjælkerne på en undervogn monterbart stativ 1, en istativet svingbart lejret ramme 2, og en i rammen svingbartlejret løfteplatform 3, samt en løftecylinder 4 og en ind¬stillingscylinder 5.The lifting lugs shown in the drawing for mounting on a cargo plane comprise, as the main parts, the chassis beams on a chassis mountable frame 1, an ice rack pivotally mounted frame 2, and a lifting platform 3 in the frame, as well as a lifting cylinder 4 and an insert. position cylinder 5.

I stativet 1 er der udformet to i køretøjets tværret¬ning fra hinanden beliggende konsoller 6, i hvilke rammen 2er svingbart lejret på i modsatte ender af den vandrettebæreaksel 7 placerede akseltappe 8. Rammen 2 er rektangulær,og til den nævnte bæreaksel er der stift fastgjort to paral¬lelle løftearme 9,10, som ved enderne stift er forenet meden med bæreakslen parallel støtteaksel 11. Rammen 2 er forsin del lejret svingbart på løfteplatformen placerede kon¬soller 12 ved hjælp af lejetappe 13.In the frame 1, two brackets 6 in the transverse direction of the vehicle are formed, in which the frame 2 is pivotally mounted on opposite ends of the horizontal support shaft 7. The frame 2 is rectangular and to the said support shaft is rigidly attached. two parallel lifting arms 9,10 which are rigidly joined at the ends with the support shaft parallel support shaft 11. The frame 2 is front mounted pivotally mounted on the lifting platform brackets 12 by means of bearing pin 13.

Ved den ene løftearm 9 er der ved et punkt 14 påkonsollen 6 i stativet lejret den i den nedre ende som hydrau- lisk cylinder udformede løftecylinder 4, som i den modsatteende er lejret i de ved punkt 15 på løftearmen udformede ører16.At one of the lifting arms 9, at a point 14 on the bracket 6 of the rack, the lifting cylinder 4 formed at the lower end is mounted, which at the opposite end is mounted in the ears formed at point 15 of the lifting arm16.

Ved den anden løftearm 10 er der ved punkt 17 på konsol¬len 6 på stativet lejret den i den nedre ende som en hydrau¬lisk cylinder udformede indstillingscylinder 5, som i denmodsatte ende er lejret i den ved punkt 18 af løfteplatformenudformede konsol 12.At the second lifting arm 10, at the bottom 17 of the bracket 6 of the rack, the adjusting cylinder 5 formed in the lower end is mounted, which at the opposite end is mounted in the bracket 12 formed at the point 18 of the lifting platform.

Løftebagsmækken er indrettet til at virke på følgende måde: Når løftebagsmækk.en skal løftes fra den nedsænkedelastningsstilling I til en løftestilling ved køretøjets ladII, kobles der tryk ind i indstillingscylinderen 5, som svin¬ger løfteplatformen til vandret stilling 1' omkring tappene13, medens rammen forbliver ubevægelig. Derefter kobles dertryk ind i løftecylinderen 4, som svinger rammen 2 opefter.Løftearmen 10 og indstillingscylinderen 5 danner et parallello-gram, som bibeholder den horisontale stilling af løfteplatfor¬men. Til svingning af løfteplatformen fra stillingen II tillodret transportstilling III indkobles der igen tryk i ind¬stillingscylinderen 5, som derved svinger løfteplatformentil vertikal stilling omkring lejetappene 13, idet rammen 3herunder forbliver urørlig..The lifting lug is arranged to act as follows: When the lifting lug is to be lifted from the submerged loading position I to a lifting position at the vehicle's load II, pressure is engaged in the setting cylinder 5, which pivots the lifting platform to horizontal position 1 'around the pins 13, while the frame 13 remains motionless. Then, pressure is engaged in the lifting cylinder 4, which swings the frame 2 upwards. The lifting arm 10 and the adjusting cylinder 5 form a parallelogram which maintains the horizontal position of the lifting platform. To pivot the lifting platform from the position II allowed transport position III, pressure is again switched on in the adjustment cylinder 5, which thereby pivots the lifting platform to the vertical position around the bearing pins 13, with the frame 3 below which remains motionless.

Man kan således konstatere, at løftearmene 9,10, bære¬akslen 7 og støtteakslen 11 danner en massiv, stiv ramme 2,som muliggør installering af løftecylinderen 4 ekscentriski forhold til rammen ved den ene af løftearmene og indstillings¬cylinderen 5 ekscentrisk i forhold til rammen med den andenløftearm. På denne måde bliver man i stand til at klare sigmed kun to hydraulikcylindre og en i konstruktion enkel ramme,og man opnår stor stabilitet og gode indstillingsegenskabersamt et minimalt pladsbehov.Thus, it can be seen that the lifting arms 9,10, the bearing shaft 7 and the supporting shaft 11 form a solid, rigid frame 2 which allows the installation of the lifting cylinder 4 eccentrically relative to the frame of one of the lifting arms and the adjusting cylinder 5 eccentric with respect to the the frame with the second lifting arm. In this way, you will be able to handle only two hydraulic cylinders and a simple frame in construction, and you achieve great stability and good adjustment characteristics, with minimal space requirements.

Tegningen og den til denne knyttede beskrivelse er kunberegnet til at illustrere tanken bag opfindelsen. I detaljernekan løftebagsmækken ifølge opfindelsen varieres på forskelligmåde indenfor rammerne af patentkravene.The drawing and the attached description are intended to illustrate the idea behind the invention only. In the retail iron bag the invention according to the invention is varied in various ways within the scope of the claims.

Claims

Hydraulic lifting lug for vehicles comprising a lifting lug fitted to the vehicle's undercarriage (1), a rectangular frame (2), the two opposite sides of which form two spaced-apart lifting arms (9,10) and if between the lifting arms (9) (10) one transverse side forms a support shaft (7) mounted in the rack (1), a lifting platform (3) pivotally mounted at the opposite end of the lifting arms (9,10), and hydraulic cylinders (4,5) for pivoting the lifting arms (9,10) in parallel planes between a submerged loading position (I) and a lifting position (II) at the vehicle load and for swinging the lifting platform (3) to an upright transport position (III), ke n- characterized in that the frame (2) is torsionally rigid, and that a hydraulic cylinder (4) is positioned below the single lifting arm (9) and is adapted to carry out the swinging of the lifting arms (9,10) in the vertical plane and that another hydraulic cylinder ( 5) is positioned under the second lifting arm (10) and arranged to carry out the lifting platform (3) oscillation relative to the lift arms (9,10).