NO750585L

NO750585L -

Info

Publication number: NO750585L
Application number: NO750585A
Authority: NO
Inventors: Y Goren; C N Springett
Original assignee: Santa Fe Int Corp
Priority date: 1974-12-30
Filing date: 1975-02-20
Publication date: 1976-07-01
Also published as: US3924415A; GB1477077A; DK121475A; IE40668L; ES435808A1; AU7854975A; CA1039068A; AU496970B2; NL7506206A; IE40668B1; DE2512565A1; IT1032277B

Description

Annordning ved lastapparat. fortrinsvis for lastebiler ,beregnet, forDevice at loading device. mainly for trucks, calculated, for

å gi en løfteplattform varierende helning.to provide a lifting platform with varying inclination.

Det er kjent bakmontert lasteappparater. for lastebiler, som omfatter parallellogramløftearmer ved visse ytterende en løfteplatt-form er svingbar anordnet i, forhold til vertikale leddarmer. Det er også kjent konstruksjoner ved hvilke løfteplattform, når løfte-armparene med sine ender hviler på marken, heller bakover. Videre er det. foreslått at ved hjelp av minst en excenter og en løfte-plattforms shéSiBing i forhold til de vertikale leddarmene i ytter-randen av parallellogramløftearmsparrene. Rear-mounted loading devices are known. for trucks, which include parallelogram lifting arms at certain extremes a lifting plate form is pivotably arranged in, in relation to vertical articulated arms. There are also known constructions in which the lifting platform, when the pairs of lifting arms rest with their ends on the ground, rather backwards. Furthermore, it is proposed that by means of at least one eccentric and one lifting platform shéSiBing in relation to the vertical joint arms in the outer edge of the parallelogram lifting arm spars.

Det- har imidlertid vist seg at de foreslåtte anordningene har visse ulemper og begrensninger, blant annet ved at de ikke til-later bruk av lasteapparatet i samtlige, forekommende brukstilfeller, og at de ikke kan manueres ved en enkel knappmanøvrering, samt at de ikke er helt funksjonssikre. However, it has been shown that the proposed devices have certain disadvantages and limitations, including that they do not allow the use of the loading device in all possible cases of use, and that they cannot be maneuvered by a simple button operation, and that they are not completely functional.

Foreliggende oppfinnelse går attpå en anorsning som øker de kjente konstruksjonene anvendbarhet i høy grad, samtidig som den fear. sikte på å, framskaffe et lasteapparaj_~kan'"s"tyres"~helt" automatisk og som er helt funksjonssikkert. The present invention is based on an arrangement which increases the applicability of the known constructions to a high degree, at the same time as it aim to provide a loading apparatus that can be controlled completely automatically and is completely functionally safe.

Dette oppnås i følge oppfinnelsen ved en anordning ved bak-monterte lasteapparater som har fått den utforming og gitt de kjenne-.tegnnaom fremgår av patentkravene. According to the invention, this is achieved by means of a device for rear-mounted loading devices which have been given the design and characteristics shown in the patent claims.

Oppfinnelsen skal i døig^ølgende forklares nærmere med hen-visning til tegningen, hvilke Fig.-l viser en utførelsesform•i følge oppfinnelsen, med løfte-plattformen i mormal og horisontal stilling, sett. fra siden. Dess- ■ uten er ytterenden av løfteplattformen i nedsvingt respektive opp-svingt stilling vist med stiplede linjer. Fig.2 viser et lengdesnitt igjennom en hydraulcylinder, som ingår som en del av anordningen ifølge fig.l. In the following, the invention will be explained in more detail with reference to the drawing, which Fig.-1 shows an embodiment according to the invention, with the lifting platform in normal and horizontal position, set. from the side. In addition, the outer end of the lifting platform in the down-swinged or up-swinging position is shown with dashed lines. Fig.2 shows a longitudinal section through a hydraulic cylinder, which is included as part of the device according to fig.1.

Ved den viste utførelsesformen er anordningen, festet til undersiden av et lastebilchassi 11 med hjelp av feste 13, i hvilken tverrgående axel 17 er roterbar laget. Den axel kan dreies ved hjelp i av en hydraulisksylinder 15, viss stempelet virker på en til axelen 17 festet arm. I Ytterenden av axelen 17 er det festet armer 16,3, In the embodiment shown, the device is attached to the underside of a truck chassis 11 by means of attachment 13, in which transverse shaft 17 is made rotatable. The axle can be turned with the help of a hydraulic cylinder 15, if the piston acts on an arm attached to the axle 17. At the outer end of the shaft 17, arms 16.3 are attached,

i dette tilfellet utformet som plate 16 som er, forskynt med stilt forb.undende for&engeaise33. To øvre løftarmer 2 med sine nder svingbart laget på bolter 18 på festene 13. Løftarmenes 16,3,2 svingbare-ender er forbundet med leddarmer 8 som er laget påaxler 4,19. Avstanden mellom axlenes 17 og 18 centrumslinjer er tilsvarende avstand for axlene 4 Og 19. Avstanden mellom axlene 4 og 18 centrumsiin linjer er også like motsvarende avstand for axlene 17 og 19. Løfte-plattformen % er på undersiden i nærheten av sin indre ende, forsynt med fire ører 5 i hvilke tverrgående axler 20 er opplagret. På disse axlene er det anordnet to linjere hydraulistiskemotorer 6,7, bestå-ende av sylinder 6 og stempel 7, svingbart laget i den lukkede enden av sylinderen 6. Stempelendene 9 er utformet som sferiske kalotter og er innrettet til å ligge an mot anslagsflater 10 på utstikkende deler 12 som er stivt, forbundét med leddarmene 8. Under den hydrauliske motoren 6,7 er det en beskyttelsesplate 14 på undersiden av løfteplattformen 1. in this case, designed as a plate 16 which is, provided with a fixed connecting for&engeaise33. Two upper lifting arms 2 with their ends pivotably made on bolts 18 on the fasteners 13. The pivoting ends of the lifting arms 16,3,2 are connected to joint arms 8 which are made on axles 4,19. The distance between axles 17 and 18 center lines is the corresponding distance for axles 4 and 19. The distance between axles 4 and 18 center lines is also the same corresponding distance for axles 17 and 19. The lifting platform % is on the underside near its inner end, provided with four lugs 5 in which transverse axles 20 are stored. Two linear hydraulic motors 6,7 are arranged on these axles, consisting of cylinder 6 and piston 7, pivotably made at the closed end of cylinder 6. The piston ends 9 are designed as spherical skull caps and are arranged to rest against impact surfaces 10 on protruding parts 12 which are rigid, connected to the articulated arms 8. Below the hydraulic motor 6,7 there is a protective plate 14 on the underside of the lifting platform 1.

De hydrauliske motorene 6,7 er hensiktsmessig av typen enkelt-virkende og med kortlag, og manøvreres på vanlig måte med knappsystem. The hydraulic motors 6,7 are suitably of the single-acting type and with short layers, and are maneuvered in the usual way with a button system.

Anordningen funksjonerer på den måte at mens løftebevegelsen oppnås ved hjelp av den hydrauliske motor 15, kan løfteplattformen 1 The device functions in such a way that while the lifting movement is achieved by means of the hydraulic motor 15, the lifting platform 1 can

helning Slforhold til den vertikale leddarmene 8 stilles inn etter behov med hjelp av de hydrauliske motorene 6,7. Om f.eks. et tungt gods skal rulles inn på kjøretøyet, fra en lastekaj, kan løfteplatt-formen stilles inn noe fellende innover mot kjøretøyet, og når et kolli fra bakkenivået skal skyves inn på løfteplattformen, kan denne stilles inn hellende utover. Beskyttelsesplaten 14 er beregnet til å forhindre at den hydrauliske motor 6,7 skades i lasteapparatets nedre stilling. inclination The ratio of the vertical articulated arms 8 is set as needed with the help of the hydraulic motors 6,7. If e.g. a heavy load is to be rolled onto the vehicle, from a loading dock, the lifting platform shape can be set slightly sloping inwards towards the vehicle, and when a package from ground level is to be pushed onto the lifting platform, this can be set sloping outwards. The protective plate 14 is intended to prevent the hydraulic motor 6,7 from being damaged in the lower position of the loader.

Por å gjøre den besskrevne anordning helt sikker sett fra et vernesynspunkt, utformes den hydrauliske motor 6,7 hensiktsmessig i følge fig.2, med en slangebruddventil 21 innbygd i bunnplaten på sylinderen 6. "Ventilen består av en kule 25 som holdes, fri av et sete 24 ved hjelp av en skruefjær- 23 i kanalen 22. Ventilen til-later foruten innsfcrømming,av hydrauliskvæske i sylinderen 6 en vissEéturstrøm, avhengig av den valgte fjærkraften. Dersom strømmen skulle øke over et visst bestemt verdi, trykkes kulen ned mot setet, og returstrømmen sperres. Etter slangebrudd eller lignende havari 'kan der ikke påvirke luftplattformens 1 hellning, eftersom ventilen befinner seg innen den hydrauliske motor 6,7. In order to make the described device completely safe from a safety point of view, the hydraulic motor 6,7 is suitably designed according to fig.2, with a hose rupture valve 21 built into the bottom plate of the cylinder 6. The valve consists of a ball 25 which is held, free of a seat 24 by means of a coil spring 23 in the channel 22. In addition to the inflow of hydraulic fluid into the cylinder 6, the valve allows a certain flow rate, depending on the selected spring force. If the flow should increase above a certain determined value, the ball is pressed down against the seat , and the return flow is blocked. After a hose break or similar accident, the inclination of the air platform 1 cannot be affected, since the valve is located within the hydraulic motor 6,7.

Claims

1. Device for a step-by-step loading device for lorries, intended to be able to give a lifting platform (1) pivotably arranged at the outer end of two parallelogram lifting arms (16,3,2) a varying inclination, characterized in that on the lifting plate shape ( 1) underside, at least one servo motor (6,7) is arranged in such a way that it can influence at least one connecting link (8) in the outer ends of the parallelogram lifting arms (16,3,2) and thereby impart the lifting platform (1) different angles relative to the connecting link (8).

2. Device according to claim 1, characterized in that the servo motor (6, 7) consists of a linear hydraulic motor.

3. Device according to claim 2, where the lifting platform (1) is pivotally stored on the upper link (4) of the connecting link (8) of the two parallelogram lifting arm pairs (16,3,2), actuated by the fact that the lifting platform (1) is at a distance from the aforementioned link (4) on its underside provided with lugs (5) in which at least one hydraulic cylinder (6) is pivotally mounted and arranged at the end of the piston (7) and rests against a stop surface (10) which is fixed. connected to the vertical connecting link arm (8), so that the cylinder (6) and the piston (7), when they move and change their mutual position in the longitudinal direction, cause the lifting platform (1) to assume different horizontal positions in relation to the connecting linkEmen (8).

4. Device according to claim 3, vessel equipped in that the piston (7) end (9) is designed as a Swedish skullcap.

5. Device according to one or more of the claims from 1-4, where a protective plate is provided. (14) which protrudes from the lifting platform (1) below the servo motor (6,7).

6. Device according to one of the claims from 2-4, characterized in that the hydraulic cylinder (6) is assembled into a unit with a hose break valve (21) which is arranged to allow a specific return flow of hydraulic fluid, and that when the return flow is exceeded and blocks the outlet of the hydraulic cylinder.